Download 57LFC/AN
Transcript
® 57LFC/AN System Calibrator Service Manual March 2004 © 2004 Fluke Corporation, All rights reserved. All product names are trademarks of their respective companies. LIMITED WARRANTY AND LIMITATION OF LIABILITY Each Fluke product is warranted to be free from defects in material and workmanship under normal use and service. The warranty period is one year and begins on the date of shipment. Parts, product repairs, and services are warranted for 90 days. This warranty extends only to the original buyer or end-user customer of a Fluke authorized reseller, and does not apply to fuses, disposable batteries, or to any product which, in Fluke's opinion, has been misused, altered, neglected, contaminated, or damaged by accident or abnormal conditions of operation or handling. Fluke warrants that software will operate substantially in accordance with its functional specifications for 90 days and that it has been properly recorded on non-defective media. Fluke does not warrant that software will be error free or operate without interruption. Fluke authorized resellers shall extend this warranty on new and unused products to end-user customers only but have no authority to extend a greater or different warranty on behalf of Fluke. Warranty support is available only if product is purchased through a Fluke authorized sales outlet or Buyer has paid the applicable international price. Fluke reserves the right to invoice Buyer for importation costs of repair/replacement parts when product purchased in one country is submitted for repair in another country. Fluke's warranty obligation is limited, at Fluke's option, to refund of the purchase price, free of charge repair, or replacement of a defective product which is returned to a Fluke authorized service center within the warranty period. To obtain warranty service, contact your nearest Fluke authorized service center to obtain return authorization information, then send the product to that service center, with a description of the difficulty, postage and insurance prepaid (FOB Destination). Fluke assumes no risk for damage in transit. Following warranty repair, the product will be returned to Buyer, transportation prepaid (FOB Destination). If Fluke determines that failure was caused by neglect, misuse, contamination, alteration, accident, or abnormal condition of operation or handling, including overvoltage failures caused by use outside the product’s specified rating, or normal wear and tear of mechanical components, Fluke will provide an estimate of repair costs and obtain authorization before commencing the work. Following repair, the product will be returned to the Buyer transportation prepaid and the Buyer will be billed for the repair and return transportation charges (FOB Shipping Point). THIS WARRANTY IS BUYER'S SOLE AND EXCLUSIVE REMEDY AND IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. FLUKE SHALL NOT BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL DAMAGES OR LOSSES, INCLUDING LOSS OF DATA, ARISING FROM ANY CAUSE OR THEORY. Since some countries or states do not allow limitation of the term of an implied warranty, or exclusion or limitation of incidental or consequential damages, the limitations and exclusions of this warranty may not apply to every buyer. If any provision of this Warranty is held invalid or unenforceable by a court or other decision-maker of competent jurisdiction, such holding will not affect the validity or enforceability of any other provision. Fluke Corporation P.O. Box 9090 Everett, WA 98206-9090 U.S.A. 11/99 To register your product online, visit register.fluke.com Fluke Europe B.V. P.O. Box 1186 5602 BD Eindhoven The Netherlands Claims Immediately upon arrival, purchaser shall check the packing container against the enclosed packing list and shall, within thirty (30) days of arrival, give Fluke notice of shortages or any nonconformity with the terms of the order. If purchaser fails to five notice, the delivery shall be deemed to conform with the terms of the order. The purchaser assumes all risk of loss or damage to instruments upon delivery by Fluke to the carrier. If an instrument is damaged in transit, PURCHASER MUST FILE ALL CLAIMS FOR DAMAGE WITH THE CARRIER to obtain compensation. Upon request by purchaser, Fluke will submit an estimate of the cost to repair shipment damage. Fluke will be happy to answer all questions to enhance the use of this instrument. Please address your requests or correspondence to: Fluke Corporation, P.O. Box 9090, Everett, WA 98206-9090. Interference Information This equipment generates and uses radio frequency energy and if not installed and used in strict accordance with the manufacturer’s instructions, may cause interference to radio and television reception. It has been type tested and found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC Rules, which are designed to provide reasonable protection against such interference in a residential installation. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one of more of the following measures: • Reorient the receiving antenna • Relocate the equipment with respect to the receiver • Move the equipment away from the receiver • Plug the equipment into a different outlet so that the computer and receiver are on different branch circuits If necessary, the user should consult the dealer or an experienced radio/television technician for additional suggestions. The user may find the following booklet prepared by the Federal Communications Commission helpful: How to Identify and Resolve Radio-TV Interference Problems. This booklet is available from the U.S. Government Printing Office, Washington, D.C. 20402. Stock No. 004-000-00345-4. OPERATOR SAFETY SUMMARY XWWARNING HIGH VOLTAGE is used in the operation of this equipment LETHAL VOLTAGE may be present on the terminals, observe all safety precautions! To avoid electrical shock hazard, the operator should not electrically contact the output hi or sense hi binding posts. During operation, lethal voltages of up to 2200 V ac or dc may be present on these terminals. Whenever the nature of the operation permits, keep one hand away from equipment to reduce the hazard of current flowing thought vital organs of the body. Terms in this Manual This instrument has been designed and tested in accordance with the safety standards listed in the General Specifications, which are located in Chapter 1 of this manual. This manual contains information and warnings which have to be followed by the user to ensure safe operation and to retain the instrument in safe condition. XWWARNING statements identify conditions or practices that could result in personal injury or loss of life. XWCAUTION statements identify conditions or practices that could result in damage to the equipment or other property. Symbols Marked on Equipment X Caution, risk of electric shock. . Protective ground (earth) terminal. Q Functional earth terminal. W Caution, risk of danger. Refer to the manual to maintain the safety provided by the equipment. XWWarning • Do not operate this calibrator in a position where it is difficult to operate the power switch. • Do not operate this calibrator in a manner not specified in the manual or the protection provided by the equipment may be impaired. • Do not operate the calibrator if it shows signs of damage or malfunction, the protection provided by the equipment may be impaired. • Do not use hook-up wire on the calibrator with an insulation or current rating of less than the calibrator output. Power Source The 57LFC is intended to operate from a power source that will not apply more than 246 V ac rms between the supply conductors or between either supply conductor and ground. A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation. Use the Proper Fuse To avoid fire hazard, use only the fuse specified on the line voltage selection switch label, and which is identical in type voltage rating, and current rating. Grounding the 57LFC The 57LFC is Safety Class I (grounded enclosure) instruments as defined in IEC 61010 2nd Edition. The enclosure is grounded through the grounding conductor of the power cord. To avoid electrical shock, plug the power cord into a properly wired earth grounded receptacle before connecting anything to any of the 57LFC terminals. A protective ground connection by way of the grounding conductor in the power cord is essential for safe operation. Use the Proper Power Cord • Use only the power cord and connector appropriate for proper operation of a 57LFC. • Use only a power cord that is in good condition. • Refer cord and connector changes to qualified service personnel. Do Not Operate in Explosive Atmospheres To avoid explosion, do not operate the 57LFC in an atmosphere of explosive gas. Do Not Remove Cover To avoid personal injury, do not remove the cover from the 57LFC. Do not operate the 57LFC without the cover properly installed. There are no user-serviceable parts inside the 57LFC, so there is no need for the operator to ever remove the cover. SERVICING SAFETY SUMMARY FOR QUALIFIED SERVICE PERSONNEL ONLY Also refer to the preceding Operator Safety Summary Do Not Service Alone Do not perform internal service or adjustment of this product unless another person capable of rendering first aid and resuscitation is present. Use Care When Servicing With Power On Dangerous voltage exist at many points inside this product. To avoid personal injury, do not touch exposed connections and components while power is on. Whenever the nature of the operation permits, keep one hand away from equipment to reduce the hazard of current flowing through vital organs of the body. Do not wear a grounded wrist strap while working on this product. A grounded wrist strap increase the risk of current flowing through the body. Disconnect power before removing protective panels, soldering, or replacing components. High voltage may still be present even after disconnecting power. FIRST AID FOR ELECTRIC SHOCK Free the Victim From the Live Conductor Shut off high voltage at once and ground the circuit. If high voltage cannot be turned off quickly, ground the circuit. If the circuit cannot be broken or grounded, use a board, dry clothing, or other nonconductor to free the victim. Get Help! Yell for help. Call an emergency number. Request medical assistance. Never Accept Ordinary and General Tests for Death Symptoms of electric shock may include unconsciousness, failure to breathe, absence of pulse, pallor, and stiffness, and severe burns. Treat the Victim If the victim is not breathing, begin CPR or mouth-to-mouth resuscitation if you are certified. Table of Contents Chapter 1 Title Introduction and Specifications ........................................................ 1-1 Introduction........................................................................................................ Service Information ........................................................................................... Accessories ........................................................................................................ Low Thermal EMF Test Leads...................................................................... Rack Mount Kit ............................................................................................. Shielded IEEE-488 Cables (Y8021, Y8022, and Y8023) ............................. Contacting Fluke................................................................................................ Specifications..................................................................................................... General Specifications................................................................................... Accuracy Specifications ................................................................................ DC Voltage Accuracy ............................................................................... DC Current Accuracy................................................................................ Resistance Accuracy ................................................................................. AC Voltage Accuracy ............................................................................... AC Voltage Distortion .............................................................................. AC Current Accuracy................................................................................ AC Current Distortion............................................................................... 2 Page 1-3 1-3 1-4 1-4 1-4 1-4 1-5 1-6 1-6 1-7 1-7 1-7 1-7 1-8 1-9 1-10 1-11 Theory of Operation ........................................................................... 2-1 Introduction........................................................................................................ A1 LED PCA ..................................................................................................... A3 Motherboard PCA........................................................................................ Relay Control and Switch Matrix.................................................................. LED Control and Output Cables ................................................................... Signal Buses .................................................................................................. Low Volt Buffer ............................................................................................ In-guard Power Supplies ............................................................................... Outguard Power Supplies .............................................................................. Miscellaneous Circuits .................................................................................. Troubleshooting Test Points.......................................................................... List of Fuses .................................................................................................. A5 Ohms PCA ................................................................................................... Precision Resistor Networks.......................................................................... i 2-3 2-5 2-5 2-5 2-10 2-10 2-10 2-10 2-11 2-11 2-12 2-13 2-13 2-14 57LFC/AN Service Manual Relay Switch Matrix and Control.................................................................. Other Control Circuits ................................................................................... Guard Circuits ............................................................................................... Compensation Circuits .................................................................................. Monitor...................................................................................................... Diagnostics................................................................................................ A6 Digital Synthesis PCA ................................................................................. Precision, Dual Tracking, +/-7 V References................................................ Precision, 28bit, PWM, Dual DAC's ............................................................. DC Voltage Operation................................................................................... DDS Waveform Generation .......................................................................... AC Voltage Operation................................................................................... DC Current Operation ................................................................................... AC Current Operation ................................................................................... Thermocouple Temperature Measurement.................................................... Iso-thermal Block Reference Junction Temperature Measurement .............. Thermocouple Voltage Measurement: .......................................................... Thermocouple Temperature Simulation........................................................ Analog to Digital Converter .......................................................................... Fault Detection .............................................................................................. Digital Control............................................................................................... A7 Current PCA................................................................................................. Detailed Hardware Description of DC/AC Current....................................... Low Current Output Amplifier...................................................................... Mid-Current Output Amplifier ...................................................................... High Current Output Amplifier ..................................................................... High Current Amplifier Power Supplies (Mongo Supplies) ......................... A8 High Voltage PCA ....................................................................................... Detailed Hardware Description of the 22 V Amplifier ................................. Detailed Description of the 220 V Amplifier ................................................ Detailed Hardware Description of the High Voltage Regulator.................... Heat Sink Temperature Measurement ........................................................... Digital Interface and Control......................................................................... A9 Out-Guard CPU PCA................................................................................... Real Time Clock Memory ............................................................................. IEEE-488 Interface........................................................................................ 3 2-14 2-26 2-26 2-27 2-27 2-29 2-33 2-33 2-33 2-34 2-34 2-35 2-35 2-35 2-35 2-36 2-36 2-36 2-36 2-36 2-37 2-37 2-40 2-40 2-41 2-42 2-43 2-44 2-46 2-47 2-49 2-51 2-51 2-52 2-52 2-52 Calibration and Verification ............................................................... 3-1 Calibration ......................................................................................................... Procedure Architecture.................................................................................. ZERO ........................................................................................................ MAIN ........................................................................................................ DIAG......................................................................................................... Calibration Steps ........................................................................................... RUN .......................................................................................................... Instruction Step (INS) ............................................................................... Reference Step (REF) ............................................................................... NOT .......................................................................................................... Verification Tests............................................................................................... Test Equipment.............................................................................................. Calibrator Configuration and Pre-check........................................................ DC Voltage Test ............................................................................................ AC Voltage Tests .......................................................................................... AC Voltage Accuracy Test ....................................................................... ii 3-3 3-3 3-3 3-3 3-3 3-3 3-4 3-4 3-4 3-4 3-5 3-5 3-6 3-7 3-9 3-9 Contents (continued) Frequency Accuracy Test.......................................................................... DC Current Test ............................................................................................ AC Current Test ............................................................................................ Current Output Compliance Test................................................................... Voltage Output Compliance Test .................................................................. Harmonic Test Levels for AC Volts.............................................................. Harmonic AC Current Test ........................................................................... External Trigger............................................................................................. Verification Test Check List.......................................................................... 4 Maintenance........................................................................................ 4-1 Introduction........................................................................................................ Replacing the Fuse............................................................................................. Cleaning the Air Filter ....................................................................................... Replacing PCA Modules ................................................................................... Cleaning the Exterior ......................................................................................... 5 4-3 4-3 4-4 4-6 4-7 List of Replaceable Parts ................................................................... 5-1 Introduction........................................................................................................ How to Obtain Parts........................................................................................... Service Centers .................................................................................................. Parts Lists........................................................................................................... 6 3-10 3-14 3-15 3-17 3-17 3-19 3-21 3-21 3-22 5-3 5-3 5-4 5-4 Schematic Diagrams .......................................................................... 6-1 iii 57LFC/AN Service Manual iv List of Tables Table 1-1. 2-1. 2-2. 2-3. 2-4. 2-5. 2-6. 2-7. 2-8. 2-9. 2-10. 2-11. 2-12. 2-13. 2-14. 2-15. 3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. 3-10. 3-11. 3-12. 5-1. 5-2. 5-3. 5-4. 5-5. Title 57LFC Accessories ................................................................................................ Functional Description of A3 Motherboard PCA Relays ...................................... A3 Motherboard PCA Power-up and Fault Relay States ....................................... A3 Motherboard PCA Final Relay States by Instrument State .............................. Control Register States by Instrument State........................................................... Functional Description of LED Signals ................................................................. A3 Motherboard PCA Test Points List .................................................................. Functional Description of A5 Ohms PCA Relays.................................................. A5 Ohms PCA Power-up and Fault Relay States .................................................. Final Relay States by Instrument State .................................................................. Functional Description of Signals .......................................................................... Compliance Voltage Thresholds ............................................................................ OTEST Register States by Instrument State .......................................................... OCHK Register States by Instrument State ........................................................... Diagnostic Values by Instrument State .................................................................. Supply Values as a Function of Ranges ................................................................. Recommended Equipment for Calibration and Verification.................................. DC Volts Measurement Limits .............................................................................. AC Volts Measurement Limits .............................................................................. AC Frequency Values ............................................................................................ 4-Wire Ohm Values ............................................................................................... 2-Wire Ohm Values ............................................................................................... DC Current Readings ............................................................................................. AC Current Limits.................................................................................................. Current Output Compliance Limits........................................................................ Voltage Output Compliance Limits ....................................................................... Harmonic Test Values for AC Volts ...................................................................... Harmonic Test Values for AC Current .................................................................. Final Assembly....................................................................................................... A1 LED PCA ......................................................................................................... A3 Motherboard PCA ............................................................................................ A5 Ohms PCA........................................................................................................ A6 Digital Synthesis PCA...................................................................................... v Page 1-4 2-6 2-7 2-8 2-9 2-10 2-12 2-17 2-20 2-21 2-26 2-28 2-30 2-30 2-32 2-47 3-6 3-8 3-10 3-11 3-12 3-13 3-14 3-16 3-17 3-18 3-20 3-21 5-5 5-9 5-10 5-18 5-23 57LFC/AN Service Manual 5-6. 5-7. 5-8. A7 Current PCA..................................................................................................... 5-31 A8 High Voltage PCA ........................................................................................... 5-39 A9 Out-Guard CPU PCA ....................................................................................... 5-55 vi List of Figures Figure 2-1. 2-2. 2-3. 2-4. 2-5. 2-6. 2-7. 3-1. 3-2. 3-3. 3-4. 3-5. 3-6. 3-7. 3-8. 3-9. 3-10. 4-1. 4-2. 4-3. 5-1. 5-2. 5-3. 5-4. 5-5. 5-6. 5-7. 5-8. 6-1. 6-2. 6-3. 6-4. 6-5. 6-6. 6-7. Title 57LFC Block Diagram........................................................................................... Block Diagram of the A5 Ohms PCA .................................................................... A5 Ohms PCA High/Low Output .......................................................................... A5 Ohms PCA High/Low Sense............................................................................ DC Current Functions ............................................................................................ AC Current Functions ............................................................................................ A8 High Voltage PCA 22 V and 220 V Amplifier ................................................ 8508A Connections to the 57LFC for DC Volts Measurement ............................. 8508A Connections to the 57LFC for AC Volts Measurement ............................. 8508A Connections to the 57LFC for AC Frequency Measurement ..................... 8508A Connections to the 57LFC for 4-Wire Ohms ............................................. 8508A Connections to the 57LFC for 2-Wire Compensated Ohms....................... 8508A Connections to the 57LFC for DC Current Measurement.......................... 8508A Connections to the 57LFC for AC Current Measurement.......................... 8508A Connections to the 57LFC for Load Current Compliance Test.................. 8508A Connections to the 57LFC for Voltage Compliance Testing ..................... Harmonic Test Setup.............................................................................................. Replacing the Fuse ................................................................................................. Accessing the Air Filter.......................................................................................... Exploded View of the Calibrator ........................................................................... Final Assembly....................................................................................................... A1 LED PCA ......................................................................................................... A3 Motherboard PCA ............................................................................................ A5 Ohms PCA........................................................................................................ A6 Digital Synthesis PCA...................................................................................... A7 Current PCA..................................................................................................... A8 High Voltage PCA ........................................................................................... A9 Out-Guard PCA................................................................................................ A1 LED PCA ......................................................................................................... A3 Motherboard PCA ............................................................................................ A5 Ohms PCA........................................................................................................ A6 Digital Synthesis PCA...................................................................................... A7 Current PCA..................................................................................................... A8 High Voltage PCA ........................................................................................... A9 Out-Guard CPU PCA ....................................................................................... vii Page 2-4 2-13 2-15 2-16 2-38 2-39 2-45 3-7 3-9 3-11 3-12 3-13 3-14 3-15 3-17 3-18 3-19 4-4 4-5 4-6 5-7 5-9 5-17 5-22 5-30 5-38 5-54 5-59 6-3 6-5 6-11 6-17 6-26 6-32 6-37 57LFC/AN Service Manual viii Chapter 1 Introduction and Specifications Title Introduction........................................................................................................ Service Information ........................................................................................... Accessories ........................................................................................................ Low Thermal EMF Test Leads...................................................................... Rack Mount Kit ............................................................................................. Shielded IEEE-488 Cables (Y8021, Y8022, and Y8023) ............................. Contacting Fluke................................................................................................ Specifications..................................................................................................... General Specifications................................................................................... Accuracy Specifications ................................................................................ DC Voltage Accuracy ............................................................................... DC Current Accuracy................................................................................ Resistance Accuracy ................................................................................. AC Voltage Accuracy ............................................................................... AC Voltage Distortion .............................................................................. AC Current Accuracy................................................................................ AC Current Distortion............................................................................... Page 1-3 1-3 1-4 1-4 1-4 1-4 1-5 1-6 1-6 1-7 1-7 1-7 1-7 1-8 1-9 1-10 1-11 1-1 57LFC/AN Service Manual 1-2 Introduction and Specifications Introduction 1 Introduction The Fluke Model 57LFC System Calibrator (hereafter called the Calibrator) is a precise instrument that calibrates a wide variety of electrical measuring instruments. This calibrator maintains a high accuracy over a wide ambient temperature range, and is able to test instruments in harsh environments, eliminating the restriction of calibrating only in a temperature-controlled standards laboratory. With a 57LFC, you can calibrate precision multimeters that measure ac or dc voltage, ac or dc current, and resistance. The Calibrator operates in a similar manner to the 57XXA series calibrators. Specifications are provided at the end of this chapter. The Calibrator is a fullyprogrammable precision source of the following: • DC voltage to 220 V. • AC voltage to 220 V rms, with output available from 10 Hz to 100 kHz. • AC and DC current to 2.2 A, with AC output available from 10 Hz to 20 kHz. • Resistance in values from 0 Ω to 19 MΩ in 1 and 1.9x. Features of the calibrator include the following: • Automatic meter error calculation obtained through using a simple remote adjust. • Programmable entry limits used for restricting the levels that can be remotely keyed into the calibrator, preventing access to levels that may be harmful to equipment or personnel. • Real-time clock and calendar. • Offset and scaling modes that simplify linearity testing of multimeters. • Standard IEEE-488 (GPIB) interface, complying with ANSI/IEEE Standards 488.11987 and 488.2-1987. • Internal self-testing and diagnostics of analog and digital functions. • Status LEDs on front panel to indicate standby (yellow), operate (green), high voltage (red), and fault (red and yellow). Service Information Each calibrator is warranted to the original purchaser for a period of one year beginning on the date received. The warranty is located at the front of this manual. Service and technical advice for the calibrator is available at Fluke Service Centers. For a complete list of Fluke Service Centers, visit www.fluke.com. A worldwide network of Fluke service centers supports Fluke instruments and assists customers in many ways. Most service centers have standards and calibration laboratories certified by local national standards organizations. The following is a partial list of the services provided by most service centers: • Repair and certified traceable calibration of all Fluke products. • Certified traceable calibration of many non-Fluke standards and calibrators. • Worldwide exchange of calibrator internal modules. Delivery inside the U.S.A. is typically within 48 hours. • Service agreements with the flexibility to suit your needs. These can be a simple warranty extension or an agreement that includes on-site support. Calibration service agreements are also available in many areas. 1-3 57LFC/AN Service Manual • Training programs and seminars, including laboratory metrology, system applications, and product maintenance. • Application help and consulting, including system design, hardware selection, custom software, site evaluation and installation. • Replacement parts inventory, including recommended spare parts and module kits. Visit www.fluke.com for locations and phone numbers of authorized Fluke service centers. Accessories Table 1-1 summarizes the accessories available for the Calibrator. Following the table is a brief description of each accessory. Table 1-1. 57LFC Accessories Model Description 5440A-7002 Low Thermal EMF Test Lead Set with Banana Plugs: One 4 ft. cable (122 cm) and two 2 ft. (61 cm) cables. 5440A-7003 Low Thermal EMF Test Lead Set with Spade Lugs. Two 4 ft. (122 cm) cables and One 2 ft. (61 cm) cable. Y8021 IEEE-488 Shielded Interface Cable, 1 Meter Y8022 IEEE-488 Shielded Interface Cable, 2 Meters Y5537 Rack Mount Kit for 57LFC and 5500A Low Thermal EMF Test Leads Two types of low thermal test leads are available. These cables are designed to exhibit low thermal emfs. The types available are: • Model 5440A-7002. Low Thermal Test Lead cables with banana plugs. Set includes one 4 ft. (122 cm) cable and two 2 ft. (61 cm) cables. Each cable includes two conductors and a shield lead. • Model 5440A-7003. Low Thermal Test Lead cables with spade lugs. Set includes two 4 ft. (122 cm) cables and one 2 ft. (61 cm) cable. Each cable includes two conductors and a shield lead. Shield lead has a banana plug connector. Rack Mount Kit The rack mount kit provides all the hardware necessary to mount the 57LFC. Rack mount instructions are included with each kit. Shielded IEEE-488 Cables (Y8021, Y8022, and Y8023) Shielded IEEE-488 cables are available in two lengths (See Table 1-1). The cables attach the calibrator to any other IEEE-488 device. Each cable has double 24-pin connectors at both ends to allow stacking. Metric threaded mounting screws are provided with each connector. Figure 4-2 in Chapter 4 shows the pinout for the IEEE-488 connector. 1-4 Introduction and Specifications Contacting Fluke 1 Contacting Fluke All Calibrators delivered to the Navy, contractors and subcontractors for the RTCASS program will be repaired and calibrated at the Fluke Technical Support Center in Everett, Washington. Contact Fluke Technical Support at 1-888-993-5853 or by sending a fax to 1-425-446-6390. The address for the Fluke Technical Support Center address is: Fluke Technical Support Center 1420 75th ST SW Everett, WA 98203-6256 U. S. A. Once full production is started the following service centers will also maintain and calibrate the Calibrator in Europe. FLUKE NEDERLAND B.V. Customer Support Services Science Park Eindhoven 5108 5692 EC Son Netherlands FLUKE DEUTSCHLAND GMBH Customer Support Services Heinrich Hertz Straße 11 D-34123 Kassel Germany and in Asia, FLUKE SOUTH EAST ASIA PTE LTD. Service Center 83 Clemenceau Avenue #15-15/06 Ue Square 239920 Singapore 1-5 57LFC/AN Service Manual Specifications The 57LFC System Calibrators are verified and calibrated at the factory prior to shipment to ensure they meet the accuracy standards required for all certified calibration laboratories. By calibrating to the specifications in this chapter, you can maintain the high performance level throughout the life of your calibrator. Specifications are valid after a warm-up period of twice the time the calibrator has been turned off, up to a maximum of 30 minutes. For example, if the calibrator has been turned off for five minutes, the warm-up period is ten minutes. To ensure the validity of the specifications, a dc zeros calibration must be performed at least every 15 days. If more than 15 days elapse without a dc zeros calibration a warning message appears. This procedure does not require any external equipment or connections and takes approximately 5 minutes to complete. General Specifications Factory set IEEE488 address ....... 4 Warm-up Time ............................... Twice the time since last warmed up, to a maximum of 30 minutes Temperature Performance............ Operating: 0 to 50 °C Calibration: 15 to 37.7 °C Storage: -40 to 75 °C Temperature Coefficient ............... Temperature Coefficient for temperatures outside tcal ±5 °C is 10% of the 1-year spec per °C. Relative Humidity Operating: ................................... <95% to 43 °C (non-condensing), <40% to 50 °C. Storage: ....................................... <95%, non-condensing Altitude Operating: ................................... 3,050 m (10,000 ft) maximum Non-operating: ........................... 12,200 m (40,000 ft) maximum Safety ............................................. Designed to comply with IEC 61010-1 2000-1; ANSI/ISA-S82.01-1994; CAN/CSA-C22.2 No. 1010.1-92 Analog Low Isolation .................... 20 V EMC ................................................ Designed to comply with IEC 61326-1 2000-11 (EMC) Class A Criteria C Line Power Line Voltage (selectable): ........... 100 V, 120 V, 208 V, and 230 V Line Frequency: .......................... 47 to 63 Hz Line Voltage Variation: ................ ±7% about line voltage setting Maximum VA: ............................. 200 Settling Time.................................. ≤ 3 to 10 seconds, similar to 5700A. Chassis Dimensions, H x W x D ... 178 mm x 432 mm x 457 mm (7 in x 17 in x 18 in) maximum Weight ............................................ Less than 18.15 kg (40 pounds) Electrical/Signal Interface............. Fluke 5700A/LP equivalent signal interface, AC Mains, IEEE-488, and RS-232 connectors, AC power switch, and Line Voltage selection all on front panel Cooling........................................... 1.42 cubic meters (50 cubic feet) per minute XWCaution Internal damage may occur if excessive external power is applied to the binding posts while the instrument is operating in current, voltage, or ohms. In voltage and current, exceeding 30 V may cause damage. In ohms, do not exceed the maximum specified current. 1-6 Introduction and Specifications Specifications 1 Accuracy Specifications DC Voltage Accuracy Absolute Uncertainty, tcal ±5 °C ±(% output + V) 1 Year Ranges Resolution 0 mV to 220 mV 0.004% 3 µV 0.1 µV 0 V to 2.2 V 0 V to 11 V 0 V to 22 V 0 V to 220 V 0.0025% 0.0025% 0.0025% 0.004% 3 µV 30 µV 30 µV 300 µV 1 µV 10 µV 10 µV 100 µV Maximum Burden [1] 50 Ω output impedance 50 mA 50 mA 50 mA 20 mA [1] Remote sensing provided on all but 220 mV range. Note: minimum output 0 V for all ranges. DC Current Accuracy Ranges Absolute Uncertainty, tcal ±5°C± (% of output + A) 1 year 0 µA to 220 µA 0.05% 0.02 µA 0 mA to 2.2 mA 0 mA to 22 mA 0 mA to 220 mA 0 A to 2.2 A 0.05% 0.05% 0.05% 0.07% 0.05 µA 0.25 µA 2.5 µA 40 µA Resolution 1 ηA 0.01 µA 0.1 µA 1 µA 10 µA Maximum Compliance Voltage Maximum Inductive Load 10 V 400 µH 10 V 10 V 10 V 4V 400 µH 400 µH 400 µH 400 µH Resistance Accuracy Nominal Resistance Value [1] Absolute Uncertainty of Characterized Value, tcal ± 5 °C ± (Ω) 1 Year Full Specification Current Maximum Peak Current Two-Wire Active Compensation Adder (ohms) [2] 0Ω 0.001 Ω 8 mA to 200 mA 220 mA 0.001 1Ω 0.001 Ω 8 mA to 100 mA 220 mA 0.001 1.9 Ω 0.002 Ω 8 mA to 100 mA 220 mA 0.001 10 Ω 0.004 Ω 8 mA to 11 mA 220 mA 0.001 19 Ω 0.008 Ω 8 mA to 11 mA 160 mA 0.001 100 Ω 0.01 Ω 8 mA to 11 mA 70 mA 0.001 190 Ω 0.02 Ω 8 mA to 11 mA 50 mA 0.001 1 kΩ 0.1 Ω 1 mA to 2 mA 22 mA 0.010 1.9 kΩ 0.2 Ω 1 mA to 1.5 mA 16 mA 0.010 10 kΩ 1Ω 0.1 mA to 0.5 mA 3 mA 0.100 19 kΩ 2Ω 0.05 mA to 0.25 mA 1.6 mA 0.200 100 kΩ 10 Ω 0.01 mA to 0.1 mA 0.3 mA 1.000 190 kΩ 20 Ω 5 µA to 50 µA 0.16 mA 2.000 1 MΩ 100 Ω 5 µA to 20 µA 30 µA NA 1.9 MΩ 200 Ω 2.5 µA to 10 µA 16 µA NA 10 MΩ 4 kΩ 0.5 µA to 2 µA 3 µA NA 19 MΩ 10 kΩ 0.25 µA to 1 µA 1.6 µA NA [1] Discrete resistors with characterized values stored in non-volatile memory. Specifications apply to the characterized value using 4-wire connections. [2] Active two-wire compensation may be selected for values up to 190 kΩ. Active compensation is 11 mA load and 2 V burden minimum. 1-7 57LFC/AN Service Manual AC Voltage Accuracy Ranges Frequency 10 mV to 22 mV 22 mV to 220 mV 0.22 V to 2.2 V 2.2 V to 22 V 22 V to 220 V [2] Absolute Uncertainty, tcal ±5 °C ± (% output + V) 1 year 10 Hz to 45 Hz 45 Hz to 20 kHz 20 kHz to 50 kHz 50 kHz to 100 kHz 10 Hz to 45 Hz 45 Hz to 20 kHz 20 kHz to 50 kHz 50 kHz to 100 kHz 10 Hz to 45 Hz 45 Hz to 20 kHz 20 kHz to 50 kHz 50 to 100 kHz 10 Hz to 45 Hz 45 Hz to 20 kHz 0.15% 0.08% 0.25% 0.5% 0.15% 0.05% 0.25% 0.4% 0.1% 0.05% 0.1% 0.25% 0.1% 0.05% 20 µV 20 µV 20 µV 50 µV 50 µV 50 µV 50 µV 200 µV 250 µV 100 µV 320 µV 2000 µV 1 mV 1 mV 20 kHz to 50 kHz 50 kHz to 100 kHz 10 Hz to 45 Hz 45 Hz to 20 kHz 20 kHz to 50 kHz 50 kHz to 100 kHz 0.1% 0.25% 0.1% 0.05% 0.25% 0.5% 1 mV 2 mV 10 mV 10 mV 20 mV 50 mV Resolution Maximum Burden [1] [2] 1 µV 50 Ω output impedance 1 µV 50 Ω output impedance 10 µV 50 mA 100 µV 50 mA 1 mV 20 mA [1] Remote sensing provided on all but 22 mV and 220 mV ranges. Maximum output current is reduced by 50% above 40 °C. Maximum load capacitance is 500 pF. [2] V x Hz limited to 11.8e6. Note: Frequency uncertainty is specified to be 0.01% of frequency setting. 1-8 Introduction and Specifications Specifications 1 AC Voltage Distortion Ranges 10 mV to 22 mV 22 mV to 220 mV 0.22 V to 2.2 V 2.2 V to 22 V 22 V to 220 V Max Distortion and noise 10 Hz to 10 MHz Bandwidth ±(% output + V) [1] Frequency 10 Hz to 45 Hz 45 Hz to 20 kHz 20 kHz to 50 kHz 50 kHz to 100 kHz 10 Hz to 45 Hz 45 Hz to 20 kHz 20 kHz to 50 kHz 50 kHz to 100 kHz 10 Hz to 45 Hz 45 Hz to 20 kHz 20 kHz to 50 kHz 50 kHz to 100 kHz 10 Hz to 45 Hz 45 Hz to 20 kHz 0.15% 0.035% 0.15% 0.25% 0.15% 0.035% 0.15% 0.20% 0.15% 0.035% 0.15% 0.20% 0.15% 0.035% 90 µV 90 µV 90 µV 90 µV 90 µV 90 µV 90 µV 90 µV 200 µV 200 µV 200 µV 200 µV 2 mV 2 mV 20 kHz to 50 kHz 50 kHz to 100 kHz 10 Hz to 45 Hz 45 Hz to 20 kHz 20 kHz to 50 kHz 50 kHz to 100 kHz 0.2% 0.5% 0.15% 0.05% 0.8% 1.0% 2 mV 2 mV 10 mV 10 mV 10 mV 10 mV [1] For larger resistive loads, multiply uncertainty specifications by (actual load/maximum full load for accuracy)2. 1-9 57LFC/AN Service Manual AC Current Accuracy Ranges [3] Frequency 10 Hz to 20 Hz 20 Hz to 45 Hz 30 µA to 220 µA 45 Hz to 1 kHz 1 kHz to 5 kHz 5 kHz to 10 kHz 10 Hz to 20 Hz 20 Hz to 45 Hz 0.22 mA to 2.2 mA 45 Hz to 1 kHz 1 kHz to 5 kHz 5 kHz to 10 kHz 10 Hz to 20 Hz 20 Hz to 45 Hz 45 Hz to 1 kHz 2.2 mA to 22 mA 1 kHz to 5 kHz 5 kHz to 10 kHz 10 kHz to 20 kHz 10 Hz to 20 Hz 20 Hz to 45 Hz 45 Hz to 1 kHz 22 mA to 220 mA 1 kHz to 5 kHz 5 kHz to 10 kHz 10 kHz to 20 kHz 10 Hz to 45 Hz 0.22 A to 2.2 A 45 Hz to 1 kHz 1 kHz to 5 kHz 5 kHz to 10 kHz Absolute Uncertainty, tcal ±5 °C ±(% of output + A) 1 year 0.3% 0.15% 0.125% 0.4% 1.5% 0.2% 0.15% 0.1% 0.2% 0.8% 0.2% 0.1% 0.1% 0.2% 0.4% 0.8% 0.18% 0.1% 0.1% 0.3% 0.4% 0.8% 0.18% 0.1% 1% 5% 0.2 µA 0.2 µA 0.2 µA 0.3 µA 0.4 µA 0.3 µA 0.3 µA 0.3 µA 0.3 µA 0.5 µA 3 µA 3 µA 3 µA 3 µA 5 µA 5 µA 30 µA 30 µA 30 µA 50 µA 100 µA 200 µA 300 µA 300 µA 3000 µA 5000 µA Resolution 7V 50 µH 0.1 µA 7V 50 µH 1 µA 7V 50 µH 10 µA 7V 50 µH 100 µA 4V 2.5 µH [2] See AC Current Compliance Adder and Distortion Table for impact of compliance voltage on specification. [3] I-guard, (as on the 5700A rear panel), required when sourcing low-level currents through a long cable. 1-10 Maximum Inductive Load [1] 0.01 µA [1] 400 µH with inductive compensation ON. Note: Frequency uncertainty is specified to be 0.01% of frequency setting. Maximum Compliance Voltage (rms) [2] Introduction and Specifications Specifications 1 AC Current Distortion Ranges 30 µA to 220 µA 0.22 mA to 2.2 mA 2.2 mA to 22 mA 22 mA to 220 mA 0.22 A to 2.2 A Frequency 10 Hz to 20 Hz 20 Hz to 45 Hz 45 Hz to 1 kHz 1 kHz to 5 kHz 5 kHz to 10 kHz 10 Hz to 20 Hz 20 Hz to 45 Hz 45 Hz to 1 kHz 1 kHz to 5 kHz 5 kHz to 10 kHz 10 Hz to 20 Hz 20 Hz to 45 Hz 45 Hz to 1 kHz 1 kHz to 5 kHz 5 kHz to 10 kHz 10 kHz to 20 kHz 10 Hz to 20 Hz 20 Hz to 45 Hz 45 Hz to 1 kHz 1 kHz to 5 kHz 5 kHz to 10 kHz 10 kHz to 20 kHz 10 Hz to 45 Hz 45 Hz to 1 kHz 1 kHz to 5 kHz 5 Hz to 10 kHz Max Distortion & Noise 10 Hz to 50 kHz BW <0.5V Burden ±(%output + A) Maximum Resistive Load For Full Accuracy Ω [1] 20 kΩ 10 kΩ 3.18 kΩ 318 Ω 18 Ω 0.15% 0.1% 0.05% 0.5% 1.0% 0.15% 0.06% 0.05% 0.5% 1.0% 0.15% 0.05% 0.07% 0.3% 0.7% 1.0% 0.15% 0.05% 0.07% 0.30% 0.70% 1.0% 0.2% 0.07% 1.0% 2.0% 0.5 µA 0.5 µA 0.5 µA 0.5 µA 0.5 µA 1.5 µA 1.5 µA 1.5 µA 1.5 µA 1.5 µA 5 µA 5 µA 5 µA 5 µA 5 µA 5 µA 50 µA 50 µA 50 µA 50 µA 50 µA 50 µA 500 µA 500 µA 500 µA 500 µA [1] For larger resistive loads, multiply uncertainty specifications by actual load/maximum full load for accuracy. Note: Current times Load cannot exceed the maximum compliance voltage. 1-11 57LFC/AN Service Manual 1-12 Chapter 2 Theory of Operation Title Introduction........................................................................................................ A1 LED PCA ..................................................................................................... A3 Motherboard PCA........................................................................................ Relay Control and Switch Matrix.................................................................. LED Control and Output Cables ................................................................... Signal Buses .................................................................................................. Low Volt Buffer ............................................................................................ In-guard Power Supplies ............................................................................... Outguard Power Supplies .............................................................................. Miscellaneous Circuits .................................................................................. Troubleshooting Test Points.......................................................................... List of Fuses .................................................................................................. A5 Ohms PCA ................................................................................................... Precision Resistor Networks.......................................................................... Relay Switch Matrix and Control.................................................................. Other Control Circuits ................................................................................... Guard Circuits ............................................................................................... Compensation Circuits .................................................................................. Monitor...................................................................................................... Diagnostics................................................................................................ A6 Digital Synthesis PCA ................................................................................. Precision, Dual Tracking, +/-7 V References................................................ Precision, 28bit, PWM, Dual DAC's ............................................................. DC Voltage Operation................................................................................... DDS Waveform Generation .......................................................................... AC Voltage Operation................................................................................... DC Current Operation ................................................................................... AC Current Operation ................................................................................... Thermocouple Temperature Measurement.................................................... Iso-thermal Block Reference Junction Temperature Measurement .............. Thermocouple Voltage Measurement: .......................................................... Thermocouple Temperature Simulation........................................................ Analog to Digital Converter .......................................................................... Fault Detection .............................................................................................. Digital Control............................................................................................... A7 Current PCA................................................................................................. Page 2-3 2-5 2-5 2-5 2-10 2-10 2-10 2-10 2-11 2-11 2-12 2-13 2-13 2-14 2-14 2-26 2-26 2-27 2-27 2-29 2-33 2-33 2-33 2-34 2-34 2-35 2-35 2-35 2-35 2-36 2-36 2-36 2-36 2-36 2-37 2-37 2-1 57LFC/AN Service Manual Detailed Hardware Description of DC/AC Current....................................... Low Current Output Amplifier...................................................................... Mid-Current Output Amplifier ...................................................................... High Current Output Amplifier ..................................................................... High Current Amplifier Power Supplies (Mongo Supplies) ......................... A8 High Voltage PCA ....................................................................................... Detailed Hardware Description of the 22 V Amplifier ................................. Detailed Description of the 220 V Amplifier ................................................ Detailed Hardware Description of the High Voltage Regulator.................... Heat Sink Temperature Measurement ........................................................... Digital Interface and Control......................................................................... A9 Out-Guard CPU PCA................................................................................... Real Time Clock Memory ............................................................................. IEEE-488 Interface........................................................................................ 2-2 2-40 2-40 2-41 2-42 2-43 2-44 2-46 2-47 2-49 2-51 2-51 2-52 2-52 2-52 Theory of Operation Introduction 2 Introduction This Chapter is intended to provide a detailed description and analysis, where appropriate, of the printed circuit board assemblies (PCAs) used in the 57LFC System Calibrator. The Calibrator contains the following PCAs. • A1 LED PCA • A3 Motherboard PCA • A5 Ohms PCA • A6 Digital Synthesis PCA • A7 Current PCA • A8 High Voltage PCA • A9 Out-Guard CPU PCA See Figure 2-1 for a block diagram of the 57LFC System Calibrator. 2-3 57LFC/AN Service Manual A9 Outguard Controller IEEE488 A6 Inguard Controller 0 to ±2.2 V AC/DC RS232 Mains Transformer A6 Digital Synthesis & Reference S W I T C H A3 Outguard Power ±12 V +5 V A3 Inguard Power A3 Output Switch A5 OHMS 0 to 19 M A7 Current ±15 V ±5 V +6 V 0 to ±2.2 A AC/DC A3 High Voltage Power A8 High Voltage ±45 V ±180 V 2 to ±220 V AC/DC Binding Posts S W I T C H S W I T C H S W I T C H apv101f.eps Figure 2-1. 57LFC Block Diagram 2-4 Theory of Operation A1 LED PCA 2 A1 LED PCA The Calibrator front panel A1 LED PCA provides the only visual indication of the instrument operation. These LEDs provide a color-coded scheme for the instrument status. XWWarning This instrument is capable of outputting lethal voltages. Observe all safety precautions. While the LEDs should provide years of operation, they are subject to wear out like any other component. Never touch the binding posts without first checking the output with a multimeter. The front panel A1 LED PCA is connected to and controlled by the A3 Motherboard PCA. A cable is used to connect the A3 Motherboard PCA to the A1 LED PCA. On power up, the yellow LED will light indicating that the instrument has moved into a standby state. The green LED is used to indicate that the instrument is in operate and there may be live voltages on the binding posts. The red LED is used to indicate that the instrument may be outputting hazardous voltages greater than 30 V rms. If diagnostic failures occur during power-up, both the yellow and red LEDs light. If all three LEDs are lit, the instrument is broken and must be sent to a qualified technician for repair. A3 Motherboard PCA The following discussion covers the theory of operations for the A3 Motherboard PCA circuits. This A3 Motherboard PCA generally carries power as well as system signal buses to the circuit cards. The A3 Motherboard PCA can be divided into several areas: 1) relay control and switch matrix, 2) LED control and output cables, 3) analog and digital buses, 4) low volt buffer, 5) in-guard power supplies, 6) out-guard power supplies, 7) miscellaneous circuits, and 8) list of fuses. Please refer to the A3 Motherboard PCA schematics for this discussion. XWWarning The A3 Motherboard PCA contains lethal voltages. Only qualified technicians should do troubleshooting. Relay Control and Switch Matrix The relay matrix is shown on Sheet 1 of the A3 Motherboard PCA schematic, and the relay control is shown on Sheet 5. Some of the purposes of the relay matrix are to provide isolation between the output binding posts and the internal circuitry during standby, and provide isolation when running zero calibration or diagnostics. The functions of the relays are shown in Table 2-1. The relay control circuits consist of U3, U5, U6, U8, and U9. For U3 (74HC138), the IG_CS1 signal is generated on the A6 Digital Synthesis PCA. U8 selects the driver latch used to set or reset the latching relays. 2-5 57LFC/AN Service Manual Table 2-1. Functional Description of A3 Motherboard PCA Relays Relay K1 Functional Description Reset: connect LO’s to the A6 Digital Synthesis PCA; connect OUT_LO to the A6 Digital Synthesis PCA RET_LO, and connects IN_SNS_LO to the A6 SNS_LO Set: disconnect LO’s from the A6 Digital Synthesis PCA; disconnect the A6 Digital Synthesis PCA RET_LO and SNS_LO from the LO input terminals K2 Reset: select internal sensing; connect OSNS_HI to IN_SNS_HI and OSNS_LO to IN_SNS_LO Set: select remote sensing; connect SNS_HI to IN_SNS_HI and SNS_LO to IN_SNS_LO K3 Reset: connect the Digital Synthesis PCA divider; connect IN_SNS_HI to the A6 VDIV Set: disconnect the Digital Synthesis PCA divider; disconnect IN_SNS_HI from VDIV K4 Reset: select VMID for output; connect VMID to OUT_HI Set: disconnect VMID from output; disconnect VMID from OUT_HI K5 Reset: select external guard; disconnect GUARD from SCOM Set: select internal guard; connect GUARD to SCOM K6 Reset: select the 2 V buffer amp; connect V3BUF to VMID for output Set: disconnect the 2 V buffer amp; disconnect V3BUF from VMID K7 Reset: disconnect the A8 High Voltage PCA output; disconnect OUT_220V from OUT_HI Set: select the A8 High Voltage PCA output; connect OUT_220V to OUT_HI K8 Reset: disconnect HIGUARD (IGUARD) from GUARD (VGUARD) Set: connect HIGUARD to GUARD K9 Reset: connect A6 Digital Synthesis PCA LO return; connect OUT_LO to A6_RET_LO Set: disconnect the A6 Digital Synthesis PCA LO return, disconnect OUT_LO from A6_RET_LO K10 Reset: provide an internal VMID sense path, connect VMID to the A6 VDIV Set: normal operation; disconnect VMID from VDIV K11 Reset: provide an internal 220 V sense path; connect OUT_220V to VMID Set: normal operation; disconnect OUT_220V from VMID On power up, the relays are forced into a benign setting to protect circuitry and the customer. Table 2-2 shows the state of the A3 Motherboard PCA relays after power up. Table 2-3 shows the A3 Motherboard PCA relay states when in several states (power up and standby). Table 2-4 shows the status of control lines for all modes of A3 Motherboard PCA operation. 2-6 Theory of Operation A3 Motherboard PCA 2 Table 2-2. A3 Motherboard PCA Power-up and Fault Relay States Relay State on Power-up or after Fault K1 Set: disconnect A6 Digital Synthesis PCA LO sense K2 Reset: select internal sensing K3 Set: disconnect the A6 Digital Synthesis PCA divider K4 Set: disconnect VMID from output K5 Reset: select external guard K6 Undefined K7 Reset: disconnect the A8 High Voltage PCA output K8 Undefined K9 Set: disconnect the A6 Digital Synthesis PCA LO return K10 Undefined K11 Undefined 2-7 57LFC/AN Service Manual Table 2-3. A3 Motherboard PCA Final Relay States by Instrument State Relay (Virtual) Register: Guard: ext Int ext int Sense: int int rem rem g=0 g=1 g=0 g=1 K11 K10 K9 K8 K7 K6 K5 K4 K3 K2 K1 d=0 d=0 d=1 d=1 4 2 1 8 4 2 1 8 4 2 1 hex hex hex hex Power Up r s s s r s r s s r s Dormant r s s s r s r s s r s External Guard (mod mask 0010h) x x x x x x r x x x x Internal Guard x x x x x x s x x x x Internal Sense (mod mast 002h) x x x x x x x x x r x External Sense x x x x x x x x x s x 22 mV A6 Output r s r s r s g r s r r Standby 22 mV A6 Output r s s s r s r s s r s 220 mV A6 Output r s r s r s g r s r r Standby 220 mV A6 Output r s s s r s r s s r s Optt 3.3 V A6 Output using LO Comp Amp r s s s r s g r r d r 03a0 03b0 03a2 03a2 Opt 3.3 V A6 Output r s r s r s g r r d r 0210 02b0 02b2 Standby Opt 3.3 A6 Output r s s s r s r s s r s 2.2 V Buffer Out using LO Comp Amp r s s s r r g r r d r 0380 0390 0382 0392 2.2 V Buffer Output r s r s r r g r r d r 0280 0290 0282 0292 r s s r r r s s r s s s r s g r r d r 03a0 03b0 03a2 03b2 02a0 02b0 02a2 02b2 Relay: Instrument State\Bit Weight: MBRLY Standby 2.2 V Buffer Output 03ad 03ad 0000 0000 0010 0000 0000 02a4 02b4 0010 0002 0002 - - - - 03ad 02a4 02b4 03ad 02a2 03ad 038d 22 V A8 Output using LO Comp Amp r s 22 V A8 Output r s r s r s g r r d r Standby 22 V A8 Output r s s s r s r s s r s 220 V A8 Output Using LO Comp Amp r s s s s s g s r d r 03e8 03f8 03ea 03fa 220 V A8 Output r s r s s s g s r d r 02e8 02f8 02ea 02fa Standby 220 V A8 Output r s s s r s r s s r s Ohms A5 Output 4-Wire r s s r r s g s s s s Standby Ohms A5 4W r s s r r s r s s r s Ohms A5 Output 2-Wire r s s r r s g s s r s Standby Ohms A5 2W r s s r r s r s s r s Ohms A5 Out 2W Comp r s s r r s g s s d s Standby A5 2W Comp r s s r r s r s s r s 03ad 03ad - - 032f 033f 032d 032d 033d - - 032f 033f 032d 032d 033d 032d Current A7 Output r s s r r s g s s s s Standby Current A7 Output r s s r r s r s s r s 032f 033f TC A10 Output r s s s r s g s s r s Standby TC A10 Output r s s s r s r s s r s 03ad Internal Measure Opt 3.3 V A6 Output r r s s r s r s s r s 01ad Internal Measure 2.2 V Buffer Output r r s s r r r s s r s 018d Internal Measure 22 V A8 Output r r s s r s r s s r s 01ad Internal Measure 220 V A8 Output s r s s r s r s s r s 05ad - - - - 032d 03ad 03bd Key: x = don’t care, r = reset, s = set, d = reset (0) for internal sense or set (1) for remote sense, g = reset (0) for external guard or set (1) for internal guard Notes: • An over-voltage detection or other serious problem should trip the instrument to the fault state. • An over-compliance or over-current detection should trip the instrument to the appropriate overload fault. • A hardware fault causes the instrument to enter the fault state. 2-8 Theory of Operation A3 Motherboard PCA 2 Table 2-4. Control Register States by Instrument State Control Register MBSW Signal: - - Instrument State \ Bit Weight: 8 4 Dormant x Fault CKIT* CKHVCUR* - WARNING* OPERATE* STANDBY* 2 1 8 4 2 1 hex x H H x H H L 36 x x H H x L H L 32 Standby x x H H x H H L 36 Output Ohms, Current, I, or V < 30 V x x H H x H L H 35 Output V > 30 V x x H H x L L H 31 Output V < 30 V, Monitor HVCOM current via SMUX x x H L x H L H 25 Output V > 30 V, Monitor HVCOM current via SMUX x x H L x L L H 21 Output Ohms, I, or V >30 V, Monitor Internal Temperature via SMUX x x L H x H L H 15 Output V > 30 V, Monitor Internal Temperature via SMUX x x L H x L L H 11 Key: x = don’t care, H = High (Off), L = Low (On) 2-9 57LFC/AN Service Manual LED Control and Output Cables Sheet 5 of the schematic shows the LED control (panel LED's connector). The LEDs are mounted on their own daughter card with control wires cabled from the A3 Motherboard PCA. A description of each LED is provided in Table 2-5. Table 2-5. Functional Description of LED Signals Signal Functional Description STANDBY* Turns on the STANDBY LED when asserted Low (YELLOW) OPERATE* Turns on the OPERATE LED when asserted Low (GREEN) WARNING* Turns on the WARNING LED when asserted Low (RED) CKHVCUR* Turns on an analog switch to place the rectified and filtered shunt voltage generated by the HVCOM current onto the SMUX line when asserted Low CKIT* Turns on a switch to connect the output of the temperature to SMUX. Sheet 1 of the A3 Motherboard PCA schematic shows the connection and wiring for the output cable from the A3 Motherboard PCA to the front panel binding posts. Note that there are two guards - IGUARD and GUARD (voltage guard). These guards may be tied together through K8 when voltage is selected. The other signal leads are OUT_HI, SNS_HI, OUT_LO, and SNS_LO. The output high and low signals (OUT_HI and OUT_LO) are used for the main output for volts, current, and ohms. The output sense signals (SNS_HI and SNS_LO) are used to sense and internally adjust the output signals. The sense terminals are not used for standard (uncompensated) two wire ohms or ac and dc current. Signal Buses The system analog and digital buses are brought to the circuit cards through the A3 Motherboard PCA connectors J105-108 and J205-208. J105-J108 provides the in-guard (IG) digital bus signal lines while J205-208 route the in-guard analog signal lines. Guard is tied to chassis through a set of diodes and MOVs (CR57, CR58, and RV3 and CR69, CR68, and RV1) and prevents the guard from floating more than 20 V from chassis. The guard is tied to SCOM through CR55, CR56, RV2, and R86. Note that relay K5 on Sheet 1 can connect the guard trace directly to SCOM. Low Volt Buffer The low voltage buffer circuit is shown on Sheet 4 of the A3 Motherboard PCA schematic (along the bottom-middle of the Sheet). The V3_3 input signal to U2 comes from the A6 Digital Synthesis PCA (A6). U2, combined with Q1,2,7 and 8, act to buffer the V3_3 signal and isolate the output voltage from the A6 card. Q3 and Q4 limit the output current that may be drawn. In-guard Power Supplies The power supplies for the analog circuits, also referred to as in-guard supplies, are shown on Sheets 2, 3, and 4 of the A3 Motherboard PCA. On Sheet 2 of the A3 Motherboard PCA schematic, the raw transformer secondaries enter at P2. 5AC1, 5AC2, 15AC1 and 15AC2 go to Sheet 3 of the A3 Motherboard PCA schematic along with the GUARD signal. RT7-10 protects the transformer from large current draws that might occur if a diode bridge on Sheet 3 of the A3 Motherboard PCA schematic or other components short. 2-10 Theory of Operation A3 Motherboard PCA 2 The 45 ac, 180 ac, and 360 ac provide the raw voltages that will be used by the A8 High Voltage and A5 Ohms PCAs. If secondary voltages become too large, TRIAC Q19 will turn on the limit voltage, open the mains fuse, and prevent damage. CR62 is the full wave rectifier for the +/-45UNR supply. The +/-45UNR are regulated to become the +/-45V supplies. MP7 and MP8 are assemblies that contain the heat sinks and the main pairs of drive transistors for the 45 V regulated supplies. U18 controls the regulation. Q12 with resistor R48 and R54 and Q13 with resistors R49 and R57 limit the output currents to ~120 mA. CR28 with VR10 and VR11 and CR 26 with VR12 and VR 13 protect against high voltages damaging the regulation circuits. Note that the HVCOM line caries the ground return currents for the high voltage supplies back to the center tap of the transformer. On Sheet 3 of the A3 Motherboard PCA schematic, CR67 and CR51 rectify the 15 V ac and 5 V ac (left side of the Sheet), respectively. The resulting +15UNR goes through U21, a dual regulator., and becomes the guarded +15 V supply. -15UNR goes into U22 and becomes the -15 V supply. VR14 and VR15 limit short term over-voltages to 22 V or so. The 5 ac signals are regulated to be the power for the relays (+5RLH) and the logic (+5 V). The +/-15 V supplies are referenced to SCOM, while the +/-5 V supplies are referenced to DCOM. Note that SCOM and DCOM grounds are kept close to each other electrically due to the Schottky diodes, CR18 and CR19. CR29 and CR31 limit the amount that the +/-15 V and +/-5 V power supplies can float from each other. Each regulator in the design is protected against short-term over voltages occurring at the regulator output with diodes CR41, CR48, CR35, CR36, and CR34. The 6 turn beads reduce conducted noise. Outguard Power Supplies The connector P1 and the out-guard secondaries labeled 12GAC and 5GAC are shown on Sheet 2 of the A3 Motherboard PCA schematic. These unregulated supplies including +5VG_UNR, become the regulated supplies for the outguard controller card (A9) and include +5VG and +/-12VG. These supply power the A9 Out-Guard CPU PCA through the connector J1 (found on Sheet five). RT1, and RT3-RT5 protect the transformer from large current draws that might occur if there is a short down stream. Each regulator in the design (U20, U25, and U19) is protected against short-term over voltages occurring at the regulator output with diodes CR42, CR43, and CR59. The 6 turn beads reduce conducted noise. The regulated +/-12 V supplies also provide power to the 24 V fan located at the front of the instrument. A second fan connector was added for a future version of the instrument. GCOM is the reference and is tied through resistors to earth, and tied to DCOM (the in-guard digital ground) through a 24 V bi-directional Zener, VR17. Miscellaneous Circuits On Sheet five of the A3 Motherboard PCA schematic, J1 connects the digital signals from the A9 Controller card to the A3 Motherboard PCA. The serial data signals form the communication path to the A6 Digital Synthesis PCA (which also controls the in-guard digital bus). J6 is used for trouble shooting the circuitry in manufacturing and service testing. Also on that Sheet is an area marked NOT INSTALLED. These circuits may be used in a future version of the product. Sheet 3 of the A3 Motherboard PCA schematic shows U27, a switch used to connect signals to the SMUX bus line for monitoring the A6 Digital Synthesis PCA. CKHVCUR* is driven by U7 pin 12 on Sheet 5 of the A3 Motherboard PCA schematic for connecting the output of the circuit checking the HVCOM current to SMUX. CKIT* can turn on a switch in U27 to connect the output of the temperature sensor h30 to SMUX. 2-11 57LFC/AN Service Manual Troubleshooting Test Points When a problem occurs with the instrument operation, one likely place to look is the A3 Motherboard PCA and its power supplies. There are a number of convenient test points to monitor the supply voltages. The test points are listed in Table 2-6. The test points can be divided into several groups: general, function unique, out-guard, and fault. General test points include V3BUF, +/-5UNR, +/-5V, +/-15UNR, and +/-15V. The V3BUF monitors the buffered signal used for ac and dc output voltages between 220 mV and 2.2 V +/-5UNR, +/-5V, +/-15UNR, and +/-15V monitor the main supplies used in all of the in-guard board circuitry. Power supplies unique to the A7 Current PCA are monitored by MMONGO, MMCOM, IREF, ICOM, +/-15I_UNR, and 15I. Power supplies unique to the A8 High Voltage PCA are +/-45UNR, +/-45V, +/-180UNR, and +/-360UNR. The A8 High Voltage PCA uses the +/-45V, +/-180UNR and +/-360UNR to produce the high voltage outputs. The A5 Ohms PCA uses the general and +/-45Vsupplies. Out-guard test points monitor provide access to +5VG_UNR, +5VG, GGND, +/-12VG_UNR, and +/-12VG power signals. These power supplies are only used for the controller card (A9) and for manufacturing test fixtures. Besides monitoring the power supplies, several test points are used to monitor fault conditions. Note that the FAULT* signal is a wired "O". The main fault signal is TP3. If any fault occurs, TP3 becomes active. TP2 monitors the 15V BALANCE FAULT* signal and provides status on the +15 V and -15 V supplies. If either supply varies from the other by too much (indicating excessive load or failure), the fault becomes active. TP4 monitors the HVCOM signal trace. If the HVCOM signal moves more than 0.5 V from SCOM, the fault becomes active. TP5 monitors OVER22V. This signal indicates if SCOM differs from chassis ground by more than about 23 V. TP49 monitors 45 V BALANCE FAULT. This fault is similar to the 15 V BALANCE FAULT and monitors that +45 V and -45 V supplies stay within a fixed range of each other. Table 2-6. A3 Motherboard PCA Test Points List Number 2-12 Description Number Description Number Description TP 1 V3BUF TP21 +45 V TP41 +MMONGO TP 2 15V BALANCE FAULT* TP22 -45 V TP42 +15UNR TP 3 FAULT* TP23 +15 V TP43 -15UNR TP 4 HVCOM FAULT* TP24 SCOM TP44 -12VG TP 5 CHASSIS 22V FAULT* TP25 SCOM TP45 -15I_UNR TP 6 +5VG_UNR TP26 -15 V TP46 +12VG_UNR TP 7 DCOM TP27 HVCOM TP47 -12VG_UNR TP 8 DCOM TP28 HVCOM TP48 -45UNR TP 9 -5 V TP29 GGND TP49 45V BALANCE FAULT* TP10 +5RLH TP30 +360UNR TP11 +5 V TP31 +180UNR TP12 -MMONGO TP32 -180UNR TP13 MMCOM TP33 -360UNR Theory of Operation A5 Ohms PCA 2 Table 2-6. A3 Motherboard PCA Test Points List (cont.) Number Description Number Description Number TP14 MMCOM TP34 GGND TP15 +IREF TP35 -5UNR TP16 -IREF TP36 +15I_UNR TP17 -15I TP37 +5VG TP18 ICOM TP38 +12VG TP19 ICOM TP39 +5UNR TP20 +15I TP40 +45UNR Description List of Fuses There are several fuses used on the A3 Motherboard PCA when resistive thermal switches cannot be used. The fuses are used primarily in the high-voltage power supply circuits. F1 and F2 are used to protect the raw +/-45 V supplies. F4 and F5 protect the +/180 V supplies, and F3 and F6 protect the +/-360 V supplies. A5 Ohms PCA The following discussion covers the theory of operations for the A5 Ohms PCA circuitry. The A5 Ohms PCA sources 1x and 1.9x fixed value resistances, provides compensation, and generates an active guard. The A5 Ohms PCA can source ohms in one of several ways: two-wire, two-wire with compensation, and four-wire ohms. For discussion purposes, the A5 Ohms PCA can be divided into several areas: precision thin film resistor networks, relay switch matrix and control circuits, other control circuits, guard circuit, two-wire compensation circuits, monitoring circuits, and diagnostic circuits. See Figure 2-1 for a block diagram of the A5 Ohms PCA. The last part of this section discusses diagnostic capability built into the A5 Ohms PCA. See the A5 Ohms PCA schematics for circuit details. A3 Motherboard PCA OUT_HI SNS_HI SNS_LO OUT_LO HIGUARD Other Control and Monitor Circuits Relay Switch Matrix and Switch Control Thin Film Resistor Networks Compensation Circuits Floating Supply (FCOM) Active Guard Circuits Figure 2-2. Block Diagram of the A5 Ohms PCA apv001f.eps 2-13 57LFC/AN Service Manual Precision Resistor Networks Fluke proprietary hermetically sealed thin film resistors (Z1-5) are used in the A5 Ohms PCA. While the values are not exact, the thin film resistors are made to have excellent time and thermal stability with low temperature coefficients. The resistors are made for 4-wire operation but may be used as 2-wire devices with degraded specifications. In four-wire mode, the resistors are connected to OUT_HI, SNS_HI, OUT_LO, and SNS_LO. The resistors have the following nominal ohm values: 0 (short), Z1 (1, 1.9), Z2 (10, 19, 100, 190, 1.0 k, 1.9 k), Z3 (10 k, 100 k, 1 M, 10 M), Z4 (19 k, 190 k, 1.9 M, 19 M). As an example, at 19 M, the maximum peak current is 1.6 µA. The limit is required because an active circuit used to guard the resistance value from leakage has a maximum range of about +/-33 V. Exceeding that voltage may cause the ZGUARD buffer to cause errors in resistance measurement. Note that the resistors have maximum peak currents that should not be exceeded, and excessive current for extended periods of time may damage the resistors and create a long term offset. Only one resistor is switched onto the out high and out low signal traces at a time. The output and sense resistor traces are directed to the output terminals through a series of relays. Relay Switch Matrix and Control The relay switch matrix and resistors are shown on Sheet 1 of the A5 Ohms PCA schematic, and the switch control circuits are shown on Sheet 5 of the A5 Ohms PCA schematic. A block diagram of the high/low and high-sense/low-sense relay routing is shown in Figures 2-2 and 2-3. The relay matrix provides switching between the various resistor values and the A3 Motherboard PCA, and also switches in guard circuits, 2-wire mode compensation circuits, and other compensation circuits. These relays are latching type and can be set or reset. A3 Motherboard PCA connections are shown on Sheet 1 (8A-8D). K29 and K30 isolate the ohms output and sense lines from the A3 Motherboard PCA. The HIGUARD signal is switched through K25 and can be used to drive the shields of HI cables when the Calibrator output is active. See the Guard Circuits section for more details. 2-14 Theory of Operation A5 Ohms PCA 2 HiSRC Out_Hi K20 K29 K17 F Comp_Out_Hi K12 K37 K7 K13, 14,16, & 38 K8,9, & 10 Z 3 Z 2 K39 K15 K2 K3 K32 K18, 19, 42, & 43 Z 1 K7 K27 K4 Z 1 short K5 K27 K11, 34, & 35 Z 2 Z 4 K41 K33 Out_Lo K30 K31 Comp_Out_Lo K31 K1 S apv002.eps Figure 2-3. A5 Ohms PCA High/Low Output 2-15 57LFC/AN Service Manual BUFCOMPV SNS_HI COMP_EXT_HI K29 HI_CHK K23 K17 COMP_RES_HI K12 K26 HIGUARD K25 K36 K13 & 38 G U A R D Z 3 C K T K8, 9, & 10 K14 & 16 Z 3 K2 Z 2 Z 1 K32 K39 S K3 Z 1 short K5 K40 K18 & 19 K28 K4 K28 K6 K11, 34, & 35 K42 & 43 Z 4 Z 2 Z 4 K41 K33 SNS_LO K30 K31 K31 RCOM1 COMP_OUT_LO K21 COMP_RES_LO LO_CHK K22 apv003.eps Figure 2-4. A5 Ohms PCA High/Low Sense 2-16 Theory of Operation A5 Ohms PCA 2 Table 2-7 provides a functional description of the relay function for either the set or reset condition on the A5 Ohms PCA. Table 2-8 provides information on the hardware control map for the relays and shows the relay setting for each state. Table 2-9 shows the final relay states by instrument state. Table 2-7. Functional Description of A5 Ohms PCA Relays Relay K1 Functional Description Reset: Connect OHMS_OUT_LO to SGND Set: Disconnect OHMS_OUT_LO from SGND K2 Reset: Connect 1.9 Ω Z1 resistance to OHMS_OUT_HI and OHMS_SNS_HI Set: Disconnect 1.9 Ω Z1 resistance from HI K3 Reset: Connect 1.9 Ω Z1 resistance to OHMS_OUT_LO and OHMS_SNS_LO Set: Disconnect 1.9 Ω Z1 resistance from LO K4 Reset: Connect 1 Ω Z1 resistance to OHMS_OUT_HI and OHMS_SNS_HI Set: Disconnect 1 Ω Z1 resistance from HI K5 Reset: Connect 1 Ω Z1 resistance to OHMS_OUT_LO and OHMS_SNS_LO Set: Disconnect 1 Ω Z1 resistance from LO K6 Reset: Connect 19 Ω through 190 kΩ HI sense bus to OHMS_SNS_HI Set: Disconnect 19 Ω through 190 kΩ HI sense bus from OHMS_SNS_HI K7 Reset: Connect 10 Ω through 100 kΩ HI source bus to OHMS_OUT_HI Set: Connect 19 Ω through 190 kΩ HI source bus to OHMS_OUT_HI K8 Reset: Connect 1 kΩ Z2 resistance to OHMS_SNS_HI and 10 Ω through 100 kΩ HI source bus Set: Disconnect 1 kΩ Z2 resistance from HI K9 Reset: Connect 100 Ω Z2 resistance to OHMS_SNS_HI and 10 Ω through 100 kΩ HI source bus Set: Disconnect 100 Ω Z2 resistance from HI K10 Reset: Connect 10 Ω Z2 resistance to OHMS_SNS_HI and 10 Ω through 100 kΩ HI source bus Set: Disconnect 10 Ω Z2 resistance from HI K11 Reset: Connect 1.9 kΩ Z2 resistance to 19 Ω through 190 kΩ HI sense and source buses Set: Disconnect 1.9 kΩ Z2 resistance from HI K12 Reset: Connect OHMS_OUT_HI to COMP_OUT_HI and OHMS_SNS_HI to COMP_RES_HI Set: Disconnect OHMS_OUT_HI from COMP_OUT_HI and OHMS_SNS_HI from COMP_RES_HI K13 Reset: Connect 10 MΩ Z3 resistance to HI_OHMS_HI and HI_SNS_HI Set: Disconnect 10 MΩ Z3 resistance from HI K14 Reset: Connect 100 kΩ Z3 resistance to OHMS_SNS_HI and 10 Ω through 100 kΩ HI source bus Set: Disconnect 100 kΩ Z3 resistance from HI 2-17 57LFC/AN Service Manual Table 2-7. Functional Description of A5 Ohms PCA Relays (cont.) Relay K15 Functional Description Reset: Connect 19 Ω through 190 kΩ HI source bus to HI_OHMS_HI Set: Disconnect 19 Ω through 190 kΩ HI source bus from HI_OHMS_HI K16 Reset: Connect 10 kΩ Z3 resistance to OHMS_SNS_HI and 10 Ω through 100 kΩ HI source bus Set: Disconnect 10 kΩ Z3 resistance from HI K17 Reset: Connect HI_SNS_HI to COMP_EXT_HI and HI_OHMS_HI to 2-wire comp FGND Set: Disconnect HI_OHMS_HI from FGND and connect COMP_EXT_HI to IZGRD and not to HI_SNS_HI K18 Reset: Connect 1.9 MΩ Z4 resistance to HI_OHMS_HI and HI_SNS_HI Set: Disconnect 1.9 MΩ Z4 resistance from HI K19 Reset: Connect 19 MΩ Z4 resistance to HI_OHMS_HI and HI_SNS_HI Set: Disconnect 19 MΩ Z4 resistance from HI K20 Reset: Connect HI_SRC to OHMS_OUT_HI Set: Disconnect HI_SRC from HI K21 Reset: Connect OHMS_SNS_LO to COMP_RES_LO Set: Connect COMP_RES_LO to RCOM1 and not to OHMS_SNS_LO K22 Reset: Connect OHMS_SNS_LO to LO_CHK Set: Disconnect OHMS_SNS_LO from LO_CHK K23 Reset: Connect OHMS_SNS_HI to HI_CHK Set: Connect BUFHCOMPV to HI_CHK K24 Reset: Short COMP_EXT_LO to COMP_OUT_LO Set: Remove Short between COMP_EXT_LO and COMP_OUT_LO K25 Reset: Connect A3 Motherboard PCA HIGUARD to ZGUARD drive Set: Disconnect A3 Motherboard PCA HIGUARD from ZGUARD K26 Reset: Connect HI_SNS_HI to input of ZGUARD amplifier Set: Disconnect HI_SNS_HI from ZGUARD amplifier input K27 Reset: Connect 0 Ω resistor (Short) to OHMS_OUT_HI and OHMS_OUT_LO Set: Disconnect 0 Ω from HI and LO source K28 Reset: Connect 0 Ω resistor (Short) to OHMS_SNS_HI and OHMS_SNS_LO Set: Disconnect 0 Ω from HI and LO sense K29 Reset: Connect A3 Motherboard PCA OUT_HI to HI_OHMS_HI and motherboard SNS_HI to HI_SNS_HI Set: Disconnect A3 Motherboard PCA OUT_HI and SNS_HI from HI_OHMS_HI and HI_SNS_HI 2-18 Theory of Operation A5 Ohms PCA 2 Table 2-7. Functional Description of A5 Ohms PCA Relays (cont.) Relay K30 Functional Description Reset: Connect A3 Motherboard PCA OUT_LO to LO_OHMS_LO and motherboard SNS_LO to LO_SNS_LO Set: Disconnect A3 Motherboard PCA OUT_LO and SNS_LO from LO_OHMS_LO and LO_SNS_LO K31 Reset: Connect LO_SNS_LO to OHMS_SNS_LO and LO_OHMS_LO to OHMS_OUT_LO Set: Connect LO_SNS_LO to COMP_EXT_LO and LO_OHMS_LO to COMP_OUT_LO K32 Reset: Connect 10 Ω, 100 Ω, and 1 kΩ Z2 resistors to OHMS_SNS_LO and OHMS_OUT_LO Set: Disconnect 10 Ω, 100 Ω, and 1 kΩ Z2 resistors from LO K33 Reset: Connect 19 Ω, 190 Ω, and 1.9 kΩ Z2 resistors to OHMS_SNS_LO and OHMS_OUT_LO Set: Disconnect 19 Ω, 190 Ω, and 1.9 kΩ Z2 resistors from LO K34 Reset: Connect 19 Ω Z2 resistance to 19 Ω through 190 kΩ HI sense and source buses Set: Disconnect 19 Ω Z2 resistance from HI K35 Reset: Connect 190 Ω Z2 resistance to 19 Ω through 190 kΩ HI sense and source buses Set: Disconnect 190 Ω Z2 resistance from HI K36 Reset: Connect OHMS_SNS_HI to HI_SNS_HI Set: Disconnect OHMS_SNS_HI from HI_SNS_HI K37 Reset: Connect 10 Ω through 100 kΩ HI source bus to HI_OHMS_HI Set: Disconnect 10 Ω through 100 kΩ HI source bus from HI_OHMS_HI K38 Reset: Connect 1 MΩ Z3 resistance to HI_OHMS_HI and HI_SNS_HI Set: Disconnect 1 MΩ Z3 resistance from HI K39 Reset: Connect 10 kΩ, 100 kΩ, 1 MΩ, and 10 MΩ Z3 resistors to OHMS_SNS_LO and OHMS_OUT_LO Set: Disconnect 10 kΩ, 100 kΩ, 1 MΩ, and 10 MΩ Z3 resistors from LO K40 Reset: Connect 19 Ω through 190 kΩ HI sense bus to HI_SNS_HI Set: Disconnect 19 Ω through 190 kΩ HI sense bus from HI_SNS_HI K41 Reset: Connect 19 kΩ, 190 kΩ, 1.9 MΩ, and 19 MΩ Z4 resistors to OHMS_SNS_LO and OHMS_OUT_LO Set: Disconnect 19 kΩ, 190 kΩ, 1.9 MΩ, and 19 MΩ Z4 resistors from LO K42 Reset: Connect 19 kΩ Z4 resistance to 19 Ω through 190 kΩ HI sense and source buses Set: Disconnect 19 kΩ Z4 resistance from HI K43 Reset: Connect 190 kΩ Z4 resistance to 19 Ω through 190 kΩ HI sense and source buses Set: Disconnect 190 kΩ Z4 resistance from HI 2-19 57LFC/AN Service Manual Table 2-8. A5 Ohms PCA Power-up Fault Relay States Relay 2-20 State on Power-up or After Fault K25 Set: Disconnects A3 Motherboard PCA HIGUARD from ZGUARD K29 Set: Disconnects A3 Motherboard PCA OUT_HI and SNS_HI from HI_OHMS_HI and HI_SNS_HI K30 Set: Disconnects A3 Motherboard PCA OUT_LO and SNS_LO from LO_OHMS_LO and LO_SNS_LO K1 to K24 Undefined state (do not care) K26 to K28 Undefined state (do not care) K31 to K43 Undefined state (do not care) s r r x x x x x x x x x x x x x x x x x Dormant Short, 4 Wire Short, 4 Wire, STBY 1 Ω, 4 Wire 1 Ω, 4 Wire, STBY 1.9 Ω, 4 Wire 1.9 Ω, 4 Wire, STBY 10 Ω, 4 Wire 10 Ω, 4 Wire, STBY 19 Ω, 4 Wire 19 Ω, 4 Wire, STBY 100 Ω, 4 Wire 100 Ω, 4 Wire, STBY 190 Ω, 4 Wire 190 Ω, 4 Wire, STBY 1 kΩ, 4 Wire 1 kΩ, 4 Wire, STBY s s s s s s s s s s s s s s s x 4 8 K8 ,K 11 Inst. State \ Bit Weight: - Power Up Relay (Virtual) Register: Relay: s s s s s s s s s s s s s s s s s s 2 K1 3, K1 9 s s s s s s s s s s s s s s s s s s 1 K1 4, K4 3 s s r r s s r r s s s s s s s s s s 8 K1 5, K4 0 r r s s r r s s r r r r r r r r s s 4 K3 6, K3 7 s s s s s s s s s s s s s s s s s s 2 K6 r r r r r r r r r r r r r r r r r r 1 K7 s s s s s s s s s s s s s s s s s s 8 K1 6, K4 2 s s s s s s s s s s s s s s s s s s 4 K1 8, K3 8 s s s s s s r r r r s s s s s s s s 2 K1 0, K3 4 s s r r r r s s s s s s s s s s s s 1 K9 ,K 35 s s s s s s s s s s s s r r s s s s 8 K4 ,K 5 s s s s s s s s s s r r s s s s s s 4 K2 ,K 3 r r r r r r r r r r r r r r r r s s 2 K2 6 s s s s s s s s s s s s s s r r s s 1 K2 7, K2 8 s s s s s s s s s s s s s s s s s s 8 K4 1 ORLY s s s s s s s s s s s s s s s s s s 4 K3 9 s s r r s s r r s s s s s s s s s s 2 K3 3 r r s s r r s s r r s s s s s s s s 1 K3 2 r r r r r r r r r r r r r r r r r r 8 K2 4 s s s s s s s s s s s s s s s s s s 4 K2 2 s s s s s s s s s s s s s s s s s s 2 K2 3 s s s s s s s s s s s s s s s s s s 1 K2 0 s s s s s s s s s s s s s s s s s s 8 K1 2 r r r r r r r r r r r r r r r r r r 4 K3 1 s s s s s s s s s s s s s s s s s s 2 K2 1 s s s s s s s s s s s s s s s s s s 1 K1 7 s r s r s r s r s r s r s r s r s s 8 K3 0 r r r r r r r r r r r r r r r r s s 4 K1 s r s r s r s r s r s r s r s r s s 2 K2 5 s r s r s r s r s r s r s r s r s s 1 K2 9 7eff f7bf 7eff f7bf 7afc f7b0 7afc f7bb 7af5 f7b0 7af5 f7bb 7af9 f7b0 7af9 f7bb 7add e7b0 7add e7bb 76dd d7b0 76dd d7bb 7aed e7b0 7aed e7bb 76ed d7b0 76ed d7bb 3afd e7b0 3afd e7bb Hex Theory of Operation A5 Ohms PCA 2 Table 2-9. Final Relay States by Instrument State 2-21 2-22 4 r r s s s s s s s s s s s s s s s s 8 x x x x x x x x x x x x x x x x x x 1.9 kΩ, 4 Wire, STBY 10 kΩ, 4 Wire 10 kΩ, 4 Wire, STBY 19 kΩ, 4 Wire 19 kΩ, 4 Wire, STBY 100 kΩ, 4 Wire 100 kΩ, 4 Wire, STBY 190 kΩ, 4 Wire 190 kΩ, 4 Wire, STBY 1 MΩ, 4 Wire 1 MΩ, 4 Wire, STBY 1.9 MΩ, 4 Wire 1.9 MΩ, 4 Wire, STBY 10 MΩ, 4 Wire 10 MΩ, 4 Wire, STBY 19 MΩ, 4 Wire 19 MΩ, 4 Wire, STBY K8 ,K 11 Inst. State \ Bit Weight: - 1.9 kΩ, 4 Wire Relay (Virtual) Register: Relay: r r r r s s s s s s s s s s s s s s 2 K1 3, K1 9 s s s s s s s s r r r r s s s s s s 1 K1 4, K4 3 s s s s s s s s r r s s r r s s r r 8 K1 5, K4 0 s s s s s s s s s s r r s s r r s s 4 K3 6, K3 7 s s s s s s s s s s s s s s s s s s 2 K6 r r r r r r r r r r r r r r r r r r 1 K7 s s s s s s s s s s s s r r r r s s 8 K1 6, K4 2 s s s s r r r r s s s s s s s s s s 4 K1 8, K3 8 s s s s s s s s s s s s s s s s s s 2 K1 0, K3 4 s s s s s s s s s s s s s s s s s s 1 K9 ,K 35 s s s s s s s s s s s s s s s s s s 8 K4 ,K 5 s s s s s s s s s s s s s s s s s s 4 K2 ,K 3 r r r r r r r r r r r r r r r r r r 2 K2 6 s s s s s s s s s s s s s s s s s s 1 K2 7, K2 8 r r s s r r s s r r s s r r s s s s 8 K4 1 ORLY s s r r s s r r s s r r s s r r s s 4 K3 9 s s s s s s s s s s s s s s s s r r 2 K3 3 s s s s s s s s s s s s s s s s s s 1 K3 2 r r r r r r r r r r r r r r r r r r 8 K2 4 s s s s s s s s s s s s s s s s s s 4 K2 2 s s s s s s s s s s s s s s s s s s 2 K2 3 s s s s s s s s s s s s s s s s s s 1 K2 0 s s s s s s s s s s s s s s s s s s 8 K1 2 r r r r r r r r r r r r r r r r r r 4 K3 1 s s s s s s s s s s s s s s s s s s 2 K2 1 s s s s s s s s s s s s s s s s s s 1 K1 7 s r s r s r s r s r s r s r s r s r 8 K3 0 r r r r r r r r r r r r r r r r r r 4 K1 s r s r s r s r s r s r s r s r s r 2 K2 5 s r s r s r s r s r s r s r s r s r 1 K2 9 36fd d7b0 36fd d7bb 7a7d b7b0 7a7d b7bb 767d 77b0 767d 77bb 6afd b7b0 6afd b7bb 66fd 77b0 66fd 77bb 7ebd b7b0 7ebd b7bb 7ebd 77b0 7ebd 77bb 5efd b7b0 5efd b7bb 5efd 77b0 5efd 77bb Hex 57LFC/AN Service Manual Table 2-9. Final Relay States by Instrument State (cont.) s r r r r s s x x x x x x x x x x x x x x x x x x 1 Ω, 2W Comp 1 Ω, 2W Comp, STBY 1.9 Ω, 2W Comp 1.9 Ω, 2W Comp, STBY 10 Ω, 2W Comp 10 Ω, 2W Comp, STBY 19 Ω, 2W Comp 19 Ω, 2W Comp, STBY 100 Ω, 2W Comp 100 Ω, 2W Comp, STBY 190 Ω, 2W Comp 190 Ω, 2W Comp, STBY 1 kΩ, 2W Comp 1 kΩ, 2W Comp, STBY 1.9 kΩ, 2W Comp 1.9 kΩ, 2W Comp, STBY 10 kΩ, 2W Comp 10 kΩ, 2W Comp, STBY s s s s s s s s s s s s x 4 8 K8 ,K 11 Inst. State \ Bit Weight: - Short, W2 omp, C STBY Relay (Virtual) Register: Relay: s s s s s s s s s s s s s s s s s s s 2 K1 3, K1 9 s s s s s s s s s s s s s s s s s s s 1 K1 4, K4 3 s s s s s s s s s s s s s s s s s s s 8 K1 5, K4 0 s s s s s s s s s s s s s s s s s s s 4 K3 6, K3 7 s s r r s s r r s s r r s s s s s s s 2 K6 r r s s r r s s r r s s r r r r r r r 1 K7 r r s s s s s s s s s s s s s s s s s 8 K1 6, K4 2 s s s s s s s s s s s s s s s s s s s 4 K1 8, K3 8 s s s s s s s s s s r r r r s s s s s 2 K1 0, K3 4 s s s s s s r r r r s s s s s s s s s 1 K9 ,K 35 s s s s s s s s s s s s s s s s r r s 8 K4 ,K 5 s s s s s s s s s s s s s s r r s s s 4 K2 ,K 3 r r r r r r r r r r r r r r r r r r r 2 K2 6 s s s s s s s s s s s s s s s s s s r 1 K2 7, K2 8 s s s s s s s s s s s s s s s s s s s 8 K4 1 ORLY r r s s s s s s s s s s s s s s s s s 4 K3 9 s s r r s s r r s s r r s s s s s s s 2 K3 3 s s s s r r s s r r s s r r s s s s s 1 K3 2 s s s s s s s s s s s s s s s s s s s 8 K2 4 s s s s s s s s s s s s s s s s s s s 4 K2 2 s s s s s s s s s s s s s s s s s s s 2 K2 3 s s s s s s s s s s s s s s s s s s s 1 K2 0 r r r r r r r r r r r r r r r r r r r 8 K1 2 s s s s s s s s s s s s s s s s s s s 4 K3 1 r r r r r r r r r r r r r r r r r r r 2 K2 1 r r r r r r r r r r r r r r r r r r r 1 K1 7 s r s r s r s r s r s r s r s r s r s 8 K3 0 r r r r r r r r r r r r r r r r r r r 4 K1 s r s r s r s r s r s r s r s r s r s 2 K2 5 s r s r s r s r s r s r s r s r s r s 1 K2 9 7efc ff4b 7ef5 ff40 7ef5 ff4b 7ef9 ff40 7ef9 ff4b 7edd ef40 7edd ef4b 7ddd df40 7ddd df4b 7eed ef40 7eed ef4b 7ded df40 7ded df4b 3efd ef40 3efd ef4b 3dfd df40 3dfd df4b 7e7d bf40 7e7d bf4b Hex Theory of Operation A5 Ohms PCA 2 Table 2-9. Final Relay States by Instrument State (cont.) 2-23 2-24 s s s s s s s r s s s s s s x x x x x x x x x x x x x x x x x x x 19 kΩ, 2W Comp, STBY 100 kΩ, 2W Comp 100 kΩ, 2W Comp, STBY 190 kΩ, 2W Comp 190 kΩ, 2W Comp, STBY DIAG, 19 Ω, 4 Wire DIAG, 190 Ω, 4 Wire DIAG, 1.9 kΩ, 4 Wire DIAG, 19 kΩ, 4 Wire DIAG, 190 kΩ, 4 Wire DIAG, 1 MΩ, 4 Wire DIAG, 1.9 MΩ, 4 Wire DIAG, 10 MΩ, 4 Wire DIAG, 19 MΩ, 4 Wire DIAG, Any Ω, 2/4 W, Measure Ivref, LO, HI, or Vcompl (use mod mask 00000700h) DIAG, Any Ω, 2/4 W, Connect Guard Amp and measure Vcompl (use mod mask 00020000h) s 4 8 K8 ,K 11 Inst. State \ Bit Weight: - 19 kΩ, 2W Comp Relay (Virtual) Register: Relay: x x r r s s s s s s s s s s s s s 2 K1 3, K1 9 x x s s s s r s s s s r r r r s s 1 K1 4, K4 3 x x r s r s r r r r r s s s s s s 8 K1 5, K4 0 x x s r s r s s s s s s s s s s s 4 K3 6, K3 7 x x r s r s r r r r r r r s s r r 2 K6 x x s r s r s s s s s s s r r s s 1 K7 x x s s s s s r s s s s s s s r r 8 K1 6, K4 2 x x s s r r s s s s s s s s s s s 4 K1 8, K3 8 x x s s s s s s s s r s s s s s s 2 K1 0, K3 4 x x s s s s s s s r s s s s s s s 1 K9 ,K 35 x x s s s s s s s s s s s s s s s 8 K4 ,K 5 x x s s s s s s s s s s s s s s s 4 K2 ,K 3 r x r r r r r r r r r r r r r r r 2 K2 6 x x s s s s s s s s s s s s s s s 1 K2 7, K2 8 x x r s r s r r s s s r r s s r r 8 K4 1 ORLY x x s r s r s s s s s s s r r s s 4 K3 9 x x s s s s s s r r r s s s s s s 2 K3 3 x x s s s s s s s s s s s s s s s 1 K3 2 x x r r r r r r r r r s s s s s s 8 K2 4 x r r r r r r r r r r s s s s s s 4 K2 2 x r r r r r r r r r r s s s s s s 2 K2 3 x r r r r r r r r r r s s s s s s 1 K2 0 x x s s s s s s s s s r r r r r r 8 K1 2 x x r r r r r r r r r s s s s s s 4 K3 1 x x s s s s s s s s s r r r r r r 2 K2 1 x x s s s s s s s s s r r r r r r 1 K1 7 x x s s s s s s s s s s r s r s r 8 K3 0 x x r r r r r r r r r r r r r r r 4 K1 x x s s s s s s s s s s r s r s r 2 K2 5 x x s s s s s s s s s s r s r s r 1 K2 9 Hex 0000 0000 7d7d 7f40 7d7d 7f4b 6efd bf40 6efd bf4b 6dfd 7f40 6dfd 7f4b 75dd d0bb 75ed d0bb 35fd d0bb 757d 70bb 65fd 70bb 7abd b0bb 75bd 70bb 5afd b0bb 55fd 70bb 0000 0000 57LFC/AN Service Manual Table 2-9. Final Relay States by Instrument State (cont.) x s 4 K8 ,K 11 s 2 K1 3, K1 9 s 1 K1 4, K4 3 s 8 K1 5, K4 0 s 4 K3 6, K3 7 s 2 K6 r 1 K7 s 8 K1 6, K4 2 s 4 K1 8, K3 8 s 2 K1 0, K3 4 s 1 K9 ,K 35 s 8 K4 ,K 5 s 4 K2 ,K 3 s 2 K2 6 s 1 K2 7, K2 8 s 8 K4 1 ORLY s 4 K3 9 s 2 K3 3 s 1 K3 2 s 8 K2 4 s 4 K2 2 s 2 K2 3 s 1 K2 0 s 8 K1 2 s 4 K3 1 s 2 K2 1 s 1 K1 7 r 8 K3 0 s 4 K1 s 2 K2 5 Key: x = don’t care, r = reset, s = set Notes • When sourcing a resistance, K25, K29, and K30 are reset after all other relays have been put into position. • When entering STBY, K25, K29, and K30 are set first. • Four Wire and two Wire (No Comp) use the same ORLY values. 4 Wire uses Remote Sense and 2 Wire (No Comp) uses Internal Sense, as selected by a Motherboard relay. • Two wire comp works only to 190 K. 8 Inst. State \ Bit Weight: - LO omp, C V ( c, dV c, a tc.) e Relay (Virtual) Register: Relay: s 1 K2 9 7eff fff7 Hex Theory of Operation A5 Ohms PCA 2 Table 2-9. Final Relay States by Instrument State (cont.) 2-25 57LFC/AN Service Manual Other Control Circuits Other controls on the A5 Ohms PCA are used for selecting a number of different parameters. Table 2-10 lists the name of the other control signals and provides a functional description. The control signals are driven by U39 and U35 as shown on Sheet 4 of the A5 Ohms PCA schematic. Table 2-10. Functional Description of Signals Signal Functional Description ENCOMPFAULT* Connects the divided and buffered SNS_HI compliance voltage to the circuit that will pull down the INS-HI line if the voltage exceeds +/-33.5 V when asserted Low. CKEXTRA* Not used. CKCOMPV* Connects the divided and buffered SNS_HI voltage to the SMUX line when asserted Low. CKLO* Connects the LO_CHK output from relay K22 to the SMUX line when asserted Low. CKHI* Connects the HI_CHK output from relay K23 to the SMUX line when asserted Low. CKIVREF* Connects the IVREF voltage to the SMUX line when asserted Low. INRCOM* Connects the RCOM1 line to the IVREF ground reference buffer when asserted Low. INIVREF* Connects the I_ACDC and the IFBCK lines to the IVREF control amplifier when asserted Low. ZIVREF* Selects 0 V to the IVREF control amplifier when asserted low to select zero output current. ZIVREF* should only be asserted when INIVREF* is de-asserted. ISELHNA* Selects the Hundreds of nano-Amp current source output when asserted Low. ISELUA* Selects the Micro-Amp current source output when asserted Low. ISELTUA* Selects the Tens of Micro-Amp current source output when asserted Low. ISELHUA* Selects the Hundreds of Micro-Amp current source output when asserted Low. ISELMA* Selects the Milli-Amp current source output when asserted Low. This is the normal default ISEL line. Only one of the ISEL lines is normally asserted at one time. Guard Circuits The U40 guard amplifier circuit drives IZGRD, ZGUARD, and also HIGUARD (see A3 Motherboard PCA pins A29 and C29) whenever the instrument is put in Operate for ohms. IZGRD also drives the shield to T1 shown on Sheet 2 of the A5 Ohms PCA schematics. Since HIGUARD is connected to the I-GUARD terminal, the guard amp drives that terminal plus whatever is connected to it as well. In Standby, HIGUARD is not driven. For volts, HIGUARD is shorted to GUARD, so that output terminal IGUARD is connected to and driven by V-GUARD. The circuitry around U40, including, Q6, R58-61, VR3, C93, VR4, and K46 provide capacitive load compensation and regulate the 45 V supply from the A3 Motherboard PCA to about +/-6 V referenced to SNS.HI. 2-26 Theory of Operation A5 Ohms PCA 2 Compensation Circuits In addition to four-wire ohms and two-wire ohms, the user can also select to have twowire compensated ohms where amplifiers and floating supplies are used to negate most of the effects of path loss associated with a two terminal resistance measurement instrument. Sheet 2 contains the compensation circuits for the HI and LO paths. HI compensation (COMP_OUT_HI) is controlled by U19 with inputs from either the internal resistance (COMP_RES_HI) and the external HI (COMP_EXT_HI). U20 provides the drive capability. Similarly, U17 and U41 control the low compensation output (COMP_OUT_LO). Relay K24 shorts the low compensation current inputs when not in use. The maximum output compensation current exceeds 100 mA. The low compensation circuit is referenced to SCOM while the high compensation circuit is referenced to FCOM. The 2 Wire Comp sense, either internal or remote, is selected by a A3 Motherboard PCA relay. The floating power supply used to power the HI compensation circuit is also shown on Sheet 2 of the A5 Ohms PCA schematic. The floating +3.75/-5 V power supply is generated by transformer T1, full wave rectifier bridge CR4, and a number of 1000 uF capacitors, as regulated by Q1, Q2, U24 and associated components. VR1 along with the R23/ R20 resistor divider set the positive regulator output. VR1 along with R30, R18, R16, and R19 set the negative regulator output. Monitor The embedded software continually monitors specific hardware aspects when in operate. In ohms, monitoring protects the instrument from damage and particularly the highperformance Fluke resistor networks from damage. This is accomplished by checking the compliance voltage against the appropriate limit on a regular basis. Short-term overloads below the hardware trip threshold will be allowed, while longer-period over-compliance voltages will cause the instrument to go to Standby. Whenever sourcing a resistance: • ENCOMPFAULT* line will be asserted so that excessive compliance voltages (above +-33 V) will quickly cause the hardware to trip out the instrument. • The compliance voltage is measured regularly using the SMUX line when in Operate. The absolute value of the measurement is internally compared with the SMUX limit given in Table 2-12 for the appropriate resistance output. If too many consecutive measurements exceed the limit, meaning the compliance voltage has been too high for over 2.5 seconds, then the software will generate an over-compliance error and put the instrument into Standby. 2-27 57LFC/AN Service Manual Table 2-11. Compliance Voltage Thresholds Max Vcompliance V dc Output Resistance 2-28 Max BUFHCOMPV V dc SMUX Limit V dc 0Ω 0 0 0.010 1.0 Ω 0.14 0.047 0.05 1.9 Ω 0.28 0.093 0.10 10 Ω 0.14 0.047 0.05 19 Ω 0.28 0.093 0.10 100 Ω 1.41 0.47 0.5 190 Ω 2.83 0.94 1.00 1.0 kΩ 2.83 0.94 1.00 1.9 kΩ 4.24 1.413 1.50 10 kΩ 14.14 4.714 5.00 19 kΩ 7.07 2.357 5.00 100 kΩ 14.14 4.714 5.00 190 kΩ 14.14 4.714 10.0 1.0 MΩ 28.28 9.427 10.0 1.9 MΩ 28.28 9.427 10.0 10 MΩ 28.28 9.427 10.0 19 MΩ 28.28 9.427 10.0 Theory of Operation A5 Ohms PCA 2 Diagnostics Diagnostics which may be executed as a remote command, check that the relays are working, and that each of the resistances is close to its calibrated value. If problems are found, an error message is printed. The error messages can be found in Appendix A of the 57LFC/AN Operators Manual. Table 2-12 lists a few of the relay settings after a power up. Ohms diagnostics work as follows for each resistance in turn: • Sets the relays (see Table 2-8, ORLY) to the DIAG state for the resistance desired. • Set the OTEST register for the test current desired based on Table 2-14. • Set the I_ACDC DDS output voltage to be that for the proper test current shown in the Table 2-14. • Set the OCHK register (see Table 2-13) to the DIAG state for measuring Ivref, and measure the SMUX line. • Next, set the OCHK register to the DIAG state for measuring LO, and measure the SMUX line. This reading should be less than the limit given in the Table 2-14. If not, there is likely a relay or resistor problem. Save this reading for subtracting from the following HI measurement. • Next, set the OCHK register to the DIAG state for measuring HI, and measure the SMUX line. Subtract the LO reading, divide by the Ichk current, and compare the resistance with the calibration value. The difference should a couple percent. If the difference is too large, there’s likely a relay, resistance, or diagnostic circuit problem. 2-29 57LFC/AN Service Manual Table 2-12. OTEST Register States by Instrument State Control Register: Signal: OTEST ISELMA* ISELHUA* ISELTUA* ISELUA* ISELHNA* ZIVR EF* INIVREF* INRCO M* Instrument State \ Bit Weight: 8 4 2 1 8 4 2 1 Hex Dormant L h h h h L h h 7b Any non-Ω function L h h h h L h h 7b Any Ω, 2/4 W, Oper or STBY or Measure Vcompl L h h h h L h h 7b DIAG, 1.5 to 3.3 mA Ichk L h h h h h L L 7c DIAG, 150 to-330 µA Ichk h L h h h h L L bc DIAG, 15 to 33 µA Ichk h h L h h h L L dc DIAG, 1.5 to 3.3 µA Ichk h h h L h h L L ec DIAG, 150 to 330 nA Ichk h h h h L h L L f4 Key: x = don’t care, h = high (off, de-asserted), L = low (on, asserted) Table 2-13. OCHK Register States by Instrument State Control Register: 2-30 OCHK Signal: - - CKIVREF* CKHI* CKLO* CKCOMPV* CKEXTRA* ENCOMPFAULT * Instrument State \ Bit Weight: 8 4 2 1 8 4 2 1 Hex Dormant x x h h h h h h 3f Any non-Ω function x x h h h h h h 3f Any Ω, 2/4 W x x h h h h h L 3e Any Ω, 2/4 W, STBY x x h h h h h h 3f Any Ω, 2/4 W, Measure Vcompl x x h h h L h L 3a DIAG, Any Ω, Measure Ivref x x L h h h h h 1f Theory of Operation A5 Ohms PCA 2 Table 2-13. OCHK Register States by Instrument State (cont.) Control Register: OCHK Signal: - - CKIVREF* CKHI* CKLO* CKCOMPV* CKEXTRA* ENCOMPFAULT * Instrument State \ Bit Weight: 8 4 2 1 8 4 2 1 Hex DIAG, Any Ω, Measure LO x x h h L h h h 37 DIAG, Any Ω, Measure HI x x h L h h h h 2f DIAG, Any Ω, Measure Vcompl x x h h h L h h 3b Key: x = don’t care, h = high (off, de-asserted), L = low (on, asserted) Notes: • Only one of the CKx lines can be asserted low at a time to switch a signal onto the SMUX line for measurement 2-31 57LFC/AN Service Manual Table 2-14. Diagnostic Values by Instrument State Instrument State Ichk IDAC (X2) OTES T Reg Ivref LO Limit Nominal HI Test Current Vdc Hex SMUX Vdc SMUX Vdc SMUX Vdc Dormant 0 mA - 7b - - - Any non-Ω function 0 mA - 7b - - - Any Ω, 2/4 W, Oper or STBY or Monitor Comp or Msr Vcompl 0 mA - 7b - - - DIAG, 0 Ω, Check Ivref, LO, or HI 3 mA 6.0 7c 3.000 0.001 <.0017 DIAG, 1 Ω, Check Ivref, LO, or HI 3 mA 6.0 7c 3.000 0.001 0.003 DIAG, 1.9 Ω, Check Ivref, LO, or HI 3 mA 6.0 7c 3.000 0.001 0.0057 DIAG, 10 Ω, Check Ivref, LO, or HI 3 mA 6.0 7c 3.000 0.001 0.030 DIAG, 19 Ω, Check Ivref, LO, or HI 3 mA 6.0 7c 3.000 0.001 0.057 DIAG, 100 Ω, Check Ivref, LO, or HI 3 mA 6.0 7c 3.000 0.001 0.300 DIAG, 190 Ω, Check Ivref, LO, or HI 3 mA 6.0 7c 3.000 0.001 0.570 DIAG, 1 kΩ, Check Ivref, LO, or HI 2 mA 4.0 7c 2.000 0.001 2.00 DIAG, 1.9 kΩ, Check Ivref, LO, or HI 2 mA 240 7c 2.000 0.001 3.80 DIAG, 10 kΩ, Check Ivref, LO, or HI 0.2 mA 4.0 bc 2.000 0.0001 2.00 DIAG, 19 kΩ, Check Ivref, LO, or HI 0.2 mA 4.0 bc 2.000 0.0001 3.80 DIAG, 100 kΩ, Check Ivref, LO, or HI 20 µA 4.0 dc 2.000 0.0001 2.00 DIAG, 190 kΩ, Check Ivref, LO, or HI 20 µA 4.0 dc 2.000 0.0001 3.80 DIAG, 1 MΩ, Check Ivref, LO, or HI 3 µA 6.0 ec 3.000 0.0001 3.00 DIAG, 1.9 MΩ, Check Ivref, LO, or HI 3 µA 6.0 ec 3.000 0.0001 5.70 DIAG, 10 MΩ, Check Ivref, LO, or HI 300 nA 6.0 f4 3.000 0.0001 3.00 DIAG, 19 MΩ, Check Ivref, LO, or HI 300 nA 6.0 f4 3.000 0.0001 5.70 Key: - = doesn’t apply Notes: 2-32 1. +-30 mV, +-300 mV, +-12 V full-scale can be measured on the SMUX line. 2. 0 to +/-3.3 V is the range of voltages that can be output on I_ACDC. Theory of Operation A6 Digital Synthesis PCA 2 A6 Digital Synthesis PCA The A6 Digital Synthesis PCA contains the following functional blocks: • Precision, dual tracking, +/-7 V references • Two precision, 28 bit, pulse width modulated, digital to analog converters (DAC's) • A 500 kHz, dual channel, variable phase, arbitrary waveform generator • A 3.3 V, AC/DC output amplifier • A 33 mV/330 mV, 50 Ω output attenuator • A 0.33 V – 1000 V sense divider and buffer amplifier • Two ac/dc averaging converters • Two amplitude control loops, for dual channel operation • An 18 bit analog to digital (A/D) converter with input mux and variable gain amplifier • A thermocouple based temperature sourcing and measuring circuit • Digital control circuitry consisting of octal latches, relay drivers, and a high speed serial link to the main CPU. These functional blocks, when used with the A8 High Voltage PCA, and/or A7 Current PCA, provide single or dual channel ac/dc V/A/W, offset table and nonsinusoidal waveforms, duty cycle, temperature measuring and sourcing, internal calibration and diagnostics, and digital control over all the analog assemblies. A brief description of each block is described below. Precision, Dual Tracking, +/-7 V References Refer to Sheet 2 of the A6 Digital Synthesis PCA schematic. The reference circuit is based on the ref amp set used in the 8842A. Reference amplifier, Q1, and op amp, U38, along with Z3 and Z4 generate a trimmed -7 V reference. This reference is inverted by a flying capacitor inverter circuit consisting of U76, C60 and C74, and buffered by U27. Each reference is also buffered by a discrete output stage; Q4 & Q5. Precision, 28bit, PWM, Dual DAC's Refer to Sheet 2 of the A6 Digital Synthesis PCA schematic. Since the two precision DAC's are identical, only the voltage channel DAC will be described. This DAC design uses pulse width modulation (PWM) to convert a digital value to a precise analog voltage. The duty cycle is generated by programmable counter logic contained in an FPGA, U5. The counters are 14 bit binary, operating off of the 10Mhz clock, generating a variable duty factor pulse train at a frequency of 610.3515Hz. The duty cycle has a resolution of 1 part in 16384 (14bits). This variable duty cycle is complemented and deskewed by a D flip flop and outputted from the FPGA as DAC1PREF and DAC1NREF, driving the gate pins of a quad analog switch, U45. U45 alternately connects the input of the DAC filter, Z10, to the +/-7 V references. The output of this filter which consists of Z10, R75,R76, U28, and C76-78, will have a voltage equal to the average value of the voltage at its input. VDC = (D-.5)*14 and D = N/16384 where N is the value that the timer is programmed to. 2-33 57LFC/AN Service Manual U52 and Z10 are used to cancel the resistance of U45, while U58 and Z2 buffer the output and divide it by two. To obtain an additional 14bits of resolution, another PWM channel is generated and output at U18-12. This signal is inverted by U19A, divided by R70, R72, and R73, and summed into the filter at C76. DC Voltage Operation Refer to Sheet 3 of the A6 Digital Synthesis PCA schematic. In the 3.3 V dc range the VDAC output from Z2 is applied to the non-inverting input of the control loop integrator, U60. The output of U60 is inverted by U87B and is buffered by the 3.3 V output amp, U42, and switched to VMID by K8. VMID is switched to the instrument output by the A3 Motherboard PCA relay A3-K3. This output is sensed by NSNS_HI and switched to VDIV by A3-K2. VDIV is applied to the sense divider, Z5, by K3. The composite sense amplifier, U57 and U21, invert the sense signal which is then applied to the inverting input of U60. The net result is an instrument output dc voltage that is equal to -VDAC. The 33 V dc range operates in a similar way, except the inverting amp, U87B, is bypassed by switch U48D and the output of U42 is amplified and inverted by the A8 High. The output of the A8 High Voltage PCA is applied to VMID and the 33 V sense input is selected by K2. The 330 m V dc range does not use the sense divider/amplifier, but instead receives its feedback through analog switch U15A. U87B is bypassed in this range so there is no inversion in this mode of operation. The output of U42 is then divided by 10 by Z8, with the output of Z8 connected to VMID by K7. The 330 V dc and 1000 V dc ranges are generated by rectifying a high voltage ac signal. First the output of U25, a DDS generated 2kHz square wave, is switched to the input of U42 by switch U48C. This square wave is amplified, stepped up, rectified and filtered by the A8 High Voltage PCA to approximately the desired dc voltage. This dc voltage is then connected to VDIV for connection to the instrument output and for sensing. In the case of the 330 V range, VDIV is connected to the sense divider/amplifier by K1. In the 1000 V range, U98 is used to invert the signal on VDIV. This divided voltage is applied to U60, which generates an error signal. This error signal is fed back to U49 (Sheet 1 of the A6 Digital Synthesis PCA schematic) for inversion and amplification before being applied to the multiplying reference pin of the DDS waveform generation DAC, U13. The voltage at this pin controls the amplitude of the ac square wave, thus adjusting the dc voltage to exactly the desired value. DDS Waveform Generation Refer to Sheets 1 and 8 of the A6 Digital Synthesis PCA schematic. Direct digital synthesis was first used at Fluke in the modulation oscillator of the 6080A synthesized signal generator. It uses a high speed waveform reconstruction DAC, digital phase accumulator, and a waveform lookup table to generate repetitive ac signals of arbitrary waveform. A modified and improved circuit, based on the same technique is contained in the FPGA, U5. The DDS circuit uses a 40 phase accumulator and uses SRAM, U1 to store the wave tables. Each memory location in the SRAM wave table corresponds to a phase. The value of each location in the wave table is the instantaneous amplitude value of the waveform for that particular phase. As the phase accumulator sequences through address locations the amplitude data is routed to the 16 bit DDS DAC's (U13, U44) where, point by point, the waveform is generated. 2-34 Theory of Operation A6 Digital Synthesis PCA 2 The FPGA splits the addresses into two channels where the address of the secondary channel can be offset from the first, thereby causing a phase difference between the two. It also provides logic for writing the waveform data to the table. The differential output current of the primary DDS DAC (U13) is converted to a voltage of about 9.7 V p-p by R41,R47 and U4. It is then filtered to remove glitches and clock feed thru and adjusted in amplitude by the scaling DAC, U53 & U25. This voltage can be further adjusted by adjusting the current flowing into U13's IREFIN pin. This is done by amplifying the control loop error voltage by an amount inversely proportional the scaling DAC's attenuation and applying it through R11 to the U13 pin 24. The secondary DDS channel works in a similar way. AC Voltage Operation Refer to Sheet 3 of the A6 Digital Synthesis PCA schematic. The output of the primary DDS channel is routed to the 3.3 V output amplifier, U42, through switch U48. This amplified/divided, outputted and sensed the same as for V dc except instead of the sense amplifier output being applied to the loop integrator, it is first converted to a dc voltage by an average responding ac/dc converter, U40, U20, Q2, Q3, CR5, U39. This dc voltage is filtered and buffered by U84 and U3, and switched into the loop integrator by U15. As in dc the loop integrator reference pin has the VDAC signal on it. The difference between the VDAC and the output of the averaging converter is integrated and applied to the DDS DAC IREFIN pin. This adjusts the output voltage of the DDS DAC, U13, until the difference is zero. DC Current Operation Refer to Sheets 2 and 4 of the A6 Digital Synthesis PCA schematic. In all the dc current ranges the IDAC output from Z1 is applied to the noninverting input of the control loop integrator, U9. The output of U9 is switched to I_AC/DC by U33A. This signal is converted to a high impedance current source by the transconductance amplifier on the A7 Current PCA. This current is routed to the AUX HI output and flows through the UUT, returning into AUX LO terminal. It then passes through a shunt on the A7 Current PCA, converting it back into a voltage, I_FBK. I_FBK is switched to the inverting input of U9 by U31, which integrates the difference between its two inputs, forcing them to be equal. AC Current Operation In all the ac current ranges, the second DDS channel from U34 is switched to I_ACDC by U33C. This signal is converted to a current, outputted, and fed back on I_FBK the same way as for dc currents. In AC, I_FBK is switched to the input of U14B where it is rectified and filtered by U14A, CR1, U84A and U3 before it is switched into the negative input of the error integrator, U9. U9 integrates the difference between this feedback signal and the IDAC output, generating an error signal. This error signal is amplified by the loop compensation DAC, U47, and U90 and then routed to the reference pin of the DDS waveform DAC, U44, adjusting the output until the difference between the inputs of U9 is zero. Thermocouple Temperature Measurement Thermocouples consist of a pair of wires that are each made of different metals or alloys. On one end of this pair, the wires are electrically connected to each other. The other end is terminated to copper contacts fastened to an isothermal block. The voltage produced at the iso-thermal block is a function of the thermocouple type and the temperature 2-35 57LFC/AN Service Manual difference between the iso-thermal block and the end of the wire pair. Thus, to measure the temperature of a thermocouple, its voltage, and the temperature of the iso-thermal block must be measured. Iso-thermal Block Reference Junction Temperature Measurement Refer to Sheet 5 of the A6 Digital Synthesis PCA schematic. The iso-thermal block contains two copper buttons to connect to the thermocouple plug, a precision 10 kΩ bead themistor glued between the buttons, and a 6-layer PWB. It is constructed to maintain as low a temperature difference between the buttons and the transistor as possible. The thermistor is biased with a programmable current sink via TC_ISO_SRC. This current sink consists of U97, U6, R108, R126, and R127 and provides about 10 µA, developing about 1 V across the thermistor. The voltage of the themistor is measured by connecting TC_ISO to the A/D input with U82A. Thermocouple Voltage Measurement: The thermocouple voltage is multiplied by 10 on the A10 Isothermal PCA. It is then switched into the A/D by U82. The A7A10 Isothermal PCA is assembled and tested as part of the A7 Current PCA. Thermocouple Temperature Simulation All that is required to simulate a thermocouple is source a voltage that would be generated by a thermocouple at that temperature. The reference junction is measured to determine the temperature of the isothermal block. Then this temperature and the requested temperature are used to determine the correct output voltage. This voltage is generated by the 3.3 DC range, buffered by U13 and divided by 10 on the A10 Isothermal PCA before being outputted on the thermocouple connector. Analog to Digital Converter Refer to Sheet 4 on the A6 Digital Synthesis PCA schematic. All internal calibration and diagnostic measurements are buffered by a gain programmable instrumentation amplifier, U10. The gain of this amplifier is selected by closing U82D (X10), closing U82C (/40), or by leaving both open (X1). The output of U10 is applied to the A/D, U30 where it is converted into a digital value to be read by the micro-controller. Fault Detection Refer to Sheet 7 of the A6 Digital Synthesis PCA schematic. In order to minimize damage caused by misuse, abuse, component malfunction, or software errors, a fault detection circuit was incorporated into the Calibrator. It consists of a set/reset fault latch, a power MOSFET for driving reset coils, and various fault detecting comparators. On the A6 Digital Synthesis PCA, the only kind of faults detected are destructive voltages present at the instrument output during voltage mode operation. This type of fault is detected with a window comparator, U50, that monitors the output of the sense buffer, U21. When the output of U21 exceeds +/-10 V the output of U50 goes low, setting the fault latch, U16. The output of the fault latch sets the signal CLR_DRVR hi, disabling all the latching relay drivers, and turns on Q6, which resets all the latching relays connected to REL_RST*. The fault latch also signals the FPGA of a fault condition via the IG_FAULT signal, allowing the software to respond appropriately. In the case of the DDS assembly, a fault condition disconnects all DDS relays that are connected to the output. 2-36 Theory of Operation A7 Current PCA 2 The FAULT*, REL_RST*, and CLR_DRVR signals are also routed to the A3 Motherboard PCA, allowing any other assembly to detect and respond to any abnormal conditions as needed. Digital Control Refer to Sheet 8 of A6 Digital Synthesis PCA schematic. The inguard analog circuitry is controlled through an FPGA, U5. U5 contains a 1 megabit/s serial link, a serial to parallel shift register, and a state machine to provide a microprocessor style data, address and control signals. U5 also incorporates six PWM circuits for DAC's and a two channel DDS circuit with phase adjust and phase error measurement. There are also some general purpose registers for control of the analog circuitry. A7 Current PCA Figure 2-4 shows the operation of DC current functions. The DC input signal to the A7 Current PCA comes from the A6 Digital Synthesis PCA on the I_ACDC line. The signal is generated by a high resolution digital-to-analog-converter (IDAC), buffered by amplifier U58, divided by Z1, and applied to the positive input of amplifier U9. The output of U9 is the I_ACDC signal. The negative input of U9 is connected to the IFBK line, which is the feedback from the shunt amplifier on the A7 Current PCA. In operation the IFBK signal must be equal to the IDAC_OUT signal. If it is not equal, the output of U9 changes the I_ACDC signal to adjust the A7 Current PCA output to make them equal. The I_ACDC signal is switched by U25 to provide the I_ACDC_SW input to U18. The output of U18 is buffered and applied to one of the three transconductance output amplifiers. The low current amplifier provides the 220 µA and 2.2 mA ranges. The mid current amplifier provides the 22 mA and 220 mA ranges. The high current amplifier provides the 2.2 A range. The output current is driven through the load connected to the OUT_HI and OUT_LO terminals and returned through the shunt resistors. The differential shunt amp amplifies the voltage developed across the shunt resistors and generates the IFBK feedback signal to the A6 Digital Synthesis PCA as noted above and also to U18 amplifier. When IFBK and I_ACDC_SW signals at the input to U18 are equal the system is in balance providing the correct output current. Figure 2-5 shows the operation of ac current functions. Operation of the ac current function is similar to dc operation except the signal provided on the I_ACDC line is an ac signal generated by the DDS and scaling DACs on the A6 Digital Synthesis PCA. The ac feedback on the IFBK line is buffered by U14 and converted to DC by the averaging ac converter before it is applied to U9 on the A6 Digital Synthesis PCA. 2-37 57LFC/AN Service Manual 57LFC DC Current A6 R14 IFBK U58 U31 + C63 TP9 Z1 U9 I_ACDC U33 IDAC 14k + Z1 14k A7 Low Current Amplifier U25 OUT_HI U18 + I_ACDC R3 2GND C117 Mid Current Amplifier IGND High Current Amplifier IGND IFBK U25 OUT_LO Shunt Amp + - Shunt Resitors U48, U52, U53, U33 SGND IGND 2GND Figure 2-5. DC Current Functions 2-38 apv014f.eps Theory of Operation A7 Current PCA 57LFC 2 AC Current A6 U14 R14 Averaging Converter + IFBK U58 U31 + C63 Z1 R17 R3 TP9 Current _Error Scaling DAC U47 U17 + 14k IDAC Out Z1 Scaling DAC U56 DDS U9 IDAC 14k U33 A7 Low Current Amplifier OUT_HI U18 + I_ACDC U25 R3 2GND C117 Mid Current Amplifier IGND High Current Amplifier IGND IFBK U25 OUT_LO Shunt Amp + - Shunt Resitors U48, U52, U53, U33 SGND IGND 2GND apv015f.eps Figure 2-6. AC Current Functions 2-39 57LFC/AN Service Manual Detailed Hardware Description of DC/AC Current Current returning from the output load is sensed by current shunt R1 for the 2.2 A range, by the 4 Ω shunt in R-net Z2 for the 220 mA range, by the 40 Ω shunt in R-net Z2; for the 22 mA range, by the 400 Ω shunt in R-net Z2 for the 2.2 mA range, and by the four 1k resistors in series (4 k total) R19, R20, R52, R155 for 220 µA range. Solid state switches U23, U10, and U28 select the shunt required by each range. The SHUNT_SEL lines from the digital control circuits activate the switches for the range required. Both the Hi and Low sides of the shunt are selected in pairs. The shunt voltage is amplified by a differential amplifier composed of amplifiers U33, U48, U53, U52 and associated components. R-net Z4 sets the gain of the differential amp to 2.5. Amplifier U29 cancels any current in the RCOM1 line. U33 provides an additional gain of 4 to the 2.2 A range shunt voltage so that a smaller value shunt could be used for less power dissipation. The output of the differential shunt amp is fed back to the A6 Digital Synthesis PCA on the IFBCK line and the CAL_OS line via solid state switches U25 and U27, and to the distortion loop error amp U18 via resistor R3. The feedback from the differential shunt amplifier via R3 is compared to the input signal from the A6 Digital Synthesis PCA I_ACDC_SW, by amplifier U18. Any difference is amplified by U18, and the difference is used to drive one of the three output amplifiers, depending on range, to the correct output level and to correct for any distortion produced by the output amplifiers within the limits of the loop gain around the whole loop. Switch U26 connects various feedback components to U18. The STBY* control line from the digital control circuit turns on a switch to short U18 output to the negative input during instrument standby to keep U18 biased to 0 output. The COMP3 control line switches C135 around U18 to reduce the loop bandwidth in DC mode and the LCOMP ON in the AC mode. The other control lines switch resistors in and out to tailor the response of the loop as needed for each range. The output U18 feeds an isolation amplifier composed of U44, U13 and associated components. This isolation amplifier provides high impedance isolation from circuits referenced to “S” common to circuits referenced to both “I” common and “2” common. The “I” common and “2” common are separated from the “S” common by the shunt resistor that is in use for each range. The output of the isolation amplifier is fed to the low current, mid current, or high current output amplifiers via relays K10 and K1. Relays K10 and K1 also configure the “I” and “2” commons as required by the output amplifier in use. Low Current Output Amplifier The output amplifier for the 220 µA and 2.2 mA ranges is composed of U32, U35, Q16, Q19, Q 20, and associated components. This amplifier uses the “2” common for its ground reference and has its own floating power supply referenced to the “2” common. The power supply is composed of transformer T1, CR26, C102, C103, U50, U51 and associated components. Amplifier U49 drives a shield in transformer T1 to reduce the capacitance between “S” common and the “2” common. Capacitance between the two commons appears across the current sensing shunt and degrades the frequency response and therefore the accuracy of the instrument. Transistor Q20, ½ of amplifier U35, CR11, R44, R148, R47, and R198 form a pull down current source of 2 mA in the 220 µA range and 6.5 mA in the 2.2 mA range. Amplifier U32, Q16, and R37 convert the input voltage at U32 pin 3 into a current that flows into R43 and forms a voltage at U35 pin 5. The other input at U35 pin 6 is derived from the resistors at the emitter of Q19 (R165, R147, and R48). Relay K12 switches R48 into the 2-40 Theory of Operation A7 Current PCA 2 circuit for the 2.2 mA range and out for the 220 µA range. The other half of K12 switches R47 and R198 into the circuit for the 2.2 mA range and out for the 220 µA range. When the voltage at U35 pin 6 is equal to the voltage at pin 5 the amplifier is biased for operation at 6.5 mA on the 2.2 mA range and 2 mA on the 220 µA range. Transistors Q41, Q42, and resistor R7 limit the current that could be forced back into the circuit if a voltage is applied to the output terminals of the instrument when the low current amplifier is in use. The current will be limited to between 10 mA and 50 mA with transient voltages up to 350 V. Solid-state relay U34 is used to disable the amplifier when it is not being used. A high on the LO_CURRENT_DISABLE line from the digital control circuit will turn on the relay, shut off the bias current in the amplifier and put it in a dormant state. The transconductance of this current amplifier is 2 mA/ V on the 2.2 mA range and 214 µA/ V on the 220 µA range. Mid-Current Output Amplifier The output amplifier for the 22 mA and 220 mA ranges is composed of U7, U58, U31, Q3, Q5, Q14, Q15, MP13, MP14 and associated components. This amplifier uses the “I” common for its ground reference. This is a class-A push-pull output stage amplifier with 242 mA bias on the 220 mA range and 27 mA bias on the 22 mA range. MP13 and Q14 supply the positive output current. MP14 and Q15 supply the negative output current. Relay K2 switches in the resistors to set the bias current. With the 1 ohm resistors switched in to the emitters of MP13 and MP14, the bias will be set at 242 mA. With the 10 ohm resistors switched in, the bias will be 27 mA. Input pin 6 of U31 connects to the emitter resistors of MP13 and input pin 5 of U31 connects to R23 through R85. U31 will adjust the base voltage of Q14 and MP13 to make the voltage at its inputs equal. Therefore, the voltage across R23 will set the bias for positive output transistors. In similar manner, the other half of U31 will set the voltage at the emitter of MP14 equal to the voltage across R32. The voltage across R32 will set the bias for the negative output transistors. With no output current, the current from the positive output transistors will flow into the negative output transistors. To obtain a positive output, the current out of MP13 and Q14 is increased and the current through MP14 and Q15 is decreased by the same amount. The total output current is therefore equal to two times the amount of the increase from the positive output transistors. The current increment that was flowing in the negative output transistors is now diverted to the output to supply ½ of the output, and the other ½ of the output comes from the increase in the positive output transistors. Negative output currents are obtained in a similar manner. When the negative output transistors current is increased, the positive output is decreased by the same amount. The maximum output from the amplifier for class A operation will therefore be equal to 2 times the bias current. When either the positive transistors or the negative transistors current is reduced to zero, the opposite side transistors will be supplying 2 times the bias current to the output. The differential drive for the output transistors is obtained from U7, U58, Q5, Q3 and associated components. The positive output transistor drive voltage across R23 is obtained from current supplied by Q5. Q5 is configured as a common base amplifier. Current from R25 in the emitter of Q5 is passed out of the collector and into R23. Q5 is biased by ½ of amplifier U58. R6 and R12 form a divider across the +15I supply to 2-41 57LFC/AN Service Manual provide +2 V at the positive input of U58. The negative input of U58 is connected to the emitter of Q5. U58 will therefore drive the base of Q5 to keep the emitter of Q5 at +2 V. The input to the mid current output amplifier is amplified by U7. The output of U7 is connected to R25//R28 and R27//R84. With zero input voltage the output of U7 will be zero. The current through R25//R28 will be 2 mA (2 V/1 K). The 2 mA through R25//R28 will be passed through Q5 to R23 to provide a voltage of 242 mV (2 mAx121 Ω). The voltage at emitter of MP13 tracks the voltage on R23 as explained above. With the 1 Ω resistor R53 switched in, the bias current will be 242 mA (242 mV/1 Ω). With the 10 Ω resistor, R50 switched in the bias current will be 27 mA (24 2 mV/9.1 Ω) (10 Ω in parallel with 100 Ω = 9.1 Ω). The negative output transistor drive operates in a similar manner. Drive voltage across R32 is obtained from the collector of Q3. Q3 is a common base stage biased to –2 volts by the other ½ of U58 and divider R14 and R15, which is across the –15I supply. The input current to Q3 emitter is from R27, which in turn is connected to the output of U7. The current through R27 will be 2 mA also, and will pass through Q3 to R32 to provide the 242 mV for the negative output transistor drive and sets the bias in the same way as explained above for the positive output transistor. Solid-state relay U30 is used to disable the amplifier when it is not being used. A high on the MID_CURRENT_DISABLE line from the digital control circuit will turn on the relay, shut off the bias current in the amplifier and put it in a dormant state. The transconductance of this current amplifier is 242 mA/ V on the 220 mA range and 27 mA/ V on the 22 mA range. High Current Output Amplifier The output amplifier for the 2.2 A range is composed of U17, U59, U37, Q9, Q4, Q10, Q1, Q2, Q8 and associated components. This amplifier uses the “I” common for its ground reference. This is a class-A push-pull output stage amplifier with 1.8 A bias in the ac mode and a class-AB push-pull output stage amplifier with 0.5 A bias in the dc mode. The circuit topology is similar to the mid current output amplifier. The output drive transistors, bias current determination, and differential drive are established in the same way as the mid current output amplifier. Refer to the mid current output amplifier above for details of the operation. Bias current for dc operation is set at 0.5 A. Relay K22 switches resistor R79 in parallel with R74 on the positive side, and R78 in parallel with R77 on the negative side. This parallel combination sets up the 0.5 A bias in the output stage. With R79 and R78 switched out of the circuit, the higher resistance and therefore higher voltage across them boost the bias in the output stage to 1.8 A for ac operation. With 0.5 A bias in the output stage in the dc mode, either the positive output transistor or the negative output transistor will shut off, depending on the polarity of the output current, at about 1 A of output current. At this point, the amplifier operates class-B with only one or the other of the output transistors in use at a time. Solid-state relay U38 is used to disable the amplifier when it is not being used. A high on the 2.2A_DISABLE line from the digital control circuit will turn on the relay, shut off the bias current in the amplifier and put it in a dormant state. The transconductance of this current amplifier is 1.83 A/ V for ac and .55 A/ V for dc ≤1 A and .45 A/ V for dc >1 A. 2-42 Theory of Operation A7 Current PCA 2 The temperatures of MP2 and MP3 are monitored with some TMP36 temperature sensors mounted to small circuit boards that are soldered to the tabs of the transistors. The temperature sensors put out 10 mV/degree C and have a 500 mV offset. A voltage divider and capacitor on the sensor circuit board reduce the +15 V supply down to around +5 V to power the sensor. The output of the sensor goes through a RC low-pass filter and is sent through U10 to the SMUX line where it can be periodically monitored when in the 2.2 A range. An out-of-range condition would indicate some kind of circuit failure or a blocked or failed fan. High Current Amplifier Power Supplies (Mongo Supplies) The power supply for the 2.2 A high current amplifier was designed to have a magnitude 5 V higher than the output peak compliance voltage. The supply will therefore be +/-5 V with 0 V compliance and +/-11 V with 6 V peak (4 V rms) compliance. The circuitry used to detect the peak compliance voltage is composed of U16, U21, U20, U19, and U47 and associated components. U16 is a unity gain buffer that monitors the output voltage from the current PCB on the OUT_HI line through K19 and R114. The output of U16 is switched by U47 to the input of U21. U21 is configured as a full-wave rectifier which gives a positive rectified output for either polarity of the input signal. This rectified output is filtered by R169, C58, and then applied to switch U47 where it is switched to the PMUX line. PMUX is monitored by the A6 Digital Synthesis PCA, which generates the "compliance voltage exceeded" message and places the instrument back to standby. The output of full-wave rectifier U21 is also applied to a track-and-hold circuit composed of U20, C59, R170, and R193. The positive input signal from U21 is inverted and charges C59 to a negative value of the same magnitude as the input. As the input voltage begins to decrease U20 will turn off and leave C59 with a voltage equal to the negative of the peak input voltage. C59 charges quickly through U20 and discharges slowly through R193 and R170 after U20 shuts off. (U20 has an open collector output stage). The voltage across C59 is applied to the positive input of one op-amp in U19. The negative input is connected to Zener diode VR2 (5.1 V) that is connected between the opamp output and the negative input. VR2 is biased on by R108 and by R63, when solidstate relay U45 is on. With this circuit configuration the output of the op-amp will always be 5.1 V lower than the voltage on the positive input. With 0 V compliance, the voltage across C59 will be 0 and therefore the output of U19 will be -5.1 V. With 6 V compliance the voltage across C59 will be -6 V and therefore the output of U19 will be -11.1 V. The output of this op-amp is the –IREF that is supplied to the high current power supply on the A3 Motherboard PCA. The other half of U19 is configured as a unity gain inverter, and inverts the –IREF to generate the +IREF signal for the high current power supply. At power ON, solid state relay U45 will be off and the bias current to VR2 and C57, which is in parallel with VR2, must come from R108 (200k). The output signals +IREF and –IREF will therefore rise slowly and in turn, the high current power supply will come up slowly. After a delay, relay U45 will turn on and normal bias current will be provided by R63. The high current power supply is located on the A3 Motherboard PCA, and is composed of U23, U24, Q14, Q17, Q9, C87, C53 and associated components. The AC input voltage from the main power transformer is full-wave rectified by CR64 and CR60 for the positive supply and by CR65 and CR61 for the negative supply. When transistor Q14 is on, the positive rectified voltage will charge C87, which provides the +MMONGO output. Q14 is controlled by U23. The inputs to U23 are the +IREF on the + input and the full-wave + rectified AC on the negative input. If the +IREF signal is larger than the AC input signal, the open collector output of U23 will be off and the gate 2-43 57LFC/AN Service Manual of Q14 will be biased on by the +15I_UNR supply through R70 and R74. Once Q14 is on, it will remain on until C87 is charged up to a voltage equal the +IREF signal and then Q14 will be turned off by U23. The voltage at the negative input of U23 turns on the output and shorts the input voltage to Q14. If Q14 is off, diode CR47 (which is connected between the negative input of U23 and the supply output) will begin to conduct when the AC input is one diode drop greater than the supply output. If the supply output decreases more than one diode drop from the +IREF, U23 will turn off and turn Q14 on and allow C87 to charge for more of the AC input cycle, rather then waiting for the next cycle of the AC input. When transistor Q9 is on, the negative rectified voltage will charge C53, which provides the -MMONGO output. U24 and Q17 control Q9. The inputs to U24 are the -IREF on the + input and the full-wave - rectified ac on the negative input. If the -IREF signal is more negative than the AC input signal, the output of U24 will be negative, which will turn on Q17. With Q17 on the +15I supply voltage will turn on Q9. Once Q9 is on, it will remain on until C53 is charged up to a voltage equal the -IREF signal and then Q9 will be turned off by U24/Q17. The voltage at the negative input of U24 turns the output off, which turns off Q17 and Q9. If Q9 is off, diode CR37, which is connected between the negative input of U24 and the negative supply output, will begin to conduct when the AC input is one diode drop less than the negative supply output. If the negative supply output increased more than one diode drop from the -IREF, U24/Q17 will turn on which will turn Q9 on and allow C53 to charge for more of the AC input cycle, rather then waiting for the next cycle of the AC input. A8 High Voltage PCA The function of the A8 High Voltage PCA is to amplify the 2.2 V (nominal max.) signal from the A6 Digital Synthesis PCA to the output levels required for the 22 V and 220 V ranges. The A11 Isothermal PCA is assembled and tested as part of the A8 High Voltage PCA. This is accomplished by employing separate amplifiers for each range. These amplifiers have gains of 10 and 100 for the 22 V and 220 V ranges respectively. The exact gain of each amplifier is not critical as overall amplitude control is maintained by an outer amplitude control loop external to the A8 High Voltage PCA. However, this outer loop does not correct for distortion, noise or offset, all of which must be suitably controlled within the amplifiers. Both amplifiers are directly (dc) coupled to the output terminals and protection against short circuit is provided by appropriate output stage current limit circuits. The A8 High Voltage PCA also contains a dual polarity high voltage regulator circuit which serves to isolate the 220 V amplifier from raw dc supply voltage variations resulting from mains fluctuations, transformer regulation and ripple. The magnitude of the positive and negative outputs may be independently set under firmware control to levels of 188 V or 375 V as dictated by the required amplifier output, thus allowing amplifier output device dissipation to be reduced. The regulator also contains a current limit and over-current shutdown feature to further protect the 220 V amplifier in the event of an output short circuit. See Figure 2-7 a diagram of the A8 High Voltage PCA 22 V and 220V amplifier. 2-44 VDIV P108 RCOM1 V 3_3 K3 K3 K3 K2 K1 K4 5k 50k 500k SG ND R133 K4 SG ND R138 SG ND 2k R132 2k R139 - R203 + U21 + 5k C29 C31 U3/U11 U5/U11 R128 R204 + - R141 200 k 20k A6 VDAC U15 K2 K1 U15 220V Discrete Gain and output stages 22V Discrete G ain and output stages Averaging Converter -PA +PA -45 +45 VM ID OUT_220V K2 K1 + U60 P108 V3_3 A8 22 V and 220 V Amplifiers Theory of Operation A8 High Voltage PCA 2 Figure 2-7. A8 High Voltage PCA 22 V and 220 V Amplifier apv016f.eps 2-45 57LFC/AN Service Manual Detailed Hardware Description of the 22 V Amplifier The 22 V amplifier has a gain of 10 and provides output voltages of between 2.2 V and 22 V dc or ac rms at frequencies up to 100 kHz. The amplifier is designed to accommodate a maximum burden of 50 mA dc or ac rms and a maximum capacitive load of 500 pF. To achieve the maximum required voltage swing under ac conditions the output stage is operated from ±45 V supply rails, whilst the input stages are operated from ±15 V rails. All power supplies are derived externally. In the 22 V range relays K3 and K4 route the input signal (V3_3) and it's associated ground (RCOM1) from connector P108 to the inverting and non-inverting inputs respectively of an operational amplifier input stage comprising U5 and U11. The combination of wide bandwidth amplifier U5 and chopper-stabilised amplifier U11 allows wide bandwidth and good dc performance to be achieved simultaneously. Transistors Q59 and Q60, diodesVR23 and VR24 and resistors R233 and R234 form a feedback voltage clamp around the op-amp to ensure the output and inverting input always remain within their linear operating range. This is necessary to prevent conditional large signal instability of the 22V amplifier resulting from the finite overload recovery time of the op-amp. Dual diodes CR31 and CR32 and associated components clamp the op-amp inverting input at approximately ±1.5V under overload conditions. The output of U5 is fed via R144, to voltage-to-current converter stage Q56. The transconductance of this stage is set by R210 and emitter bias current is provided by current source Q55. Diode CR47 is included to prevent reverse base-emitter breakdown of Q56 which would otherwise occur under overload conditions. The output from the collector of Q56 is applied to the input of common emitter amplifier Q36: this stage is referenced to the -45V supply rail and provides the full output voltage swing of the amplifier. Collector bias current for Q26 is supplied by current source Q35, thus maximising the low frequency gain of the stage. The output from Q35 is buffered by emitter followers Q11 (biased by current source Q8/Q10) and Q12 (biased by current source Q9/Q34) before being fed to complimentary output emitter followers Q4 and Q5 respectively. The output stage bias current is defined by the quiescent voltage imposed across the series/parallel combination of resistors R3 to R10: this voltage is the sum of the base emitter voltages of Q11 and Q12 and the voltage across dual diodes CR16 and CR17 less the base emitter voltages of Q4 and Q5 and the voltage across CR3 and CR6. Resistors R3 to R10 are chosen to set this current at approximately 40mA so that the output stage operates in class A under all specified load conditions to eliminate crossover distortion. Transistor Q3 provides limiting for positive output currents by absorbing further increases in base current to Q4 once sufficient voltage is developed across the R3/R4 parallel combination to turn Q3 on: Q6 provides limiting for negative currents in a similar manner by restricting the base current to Q5. Under current limit conditions, dual diodes CR16 and CR17 prevent reverse base-emitter breakdown of Q11and Q12 respectively whilst diodes CR4 and CR5 prevent current flow from Q11 and Q12 to the output via the forward biased collector-base junctions of Q3 and Q6 respectively. The overall gain of the amplifier within the specified operating bandwidth is defined by feedback network R139, R145 and R146 and is given by the expression (R145 + R146)/R139. Stability is ensured by dominant pole compensation provided by local feedback around Q35 via capacitor C33. Additional open loop frequency response shaping is provided by local feedback around U5/U11 via R141 and C31. Fuse F1 and diodes CR14 and CR15 are included to help protect the amplifier in the event of an external high voltage source being connected to the output terminals. During such an occurrence the amplifier output is clamped to the ±45V supply rails by CR14 2-46 Theory of Operation A8 High Voltage PCA 2 and/or CR15, providing short-term protection. The resulting large current flow eventually causes F1 to rupture, thus providing protection in the longer term. To minimize undesirable effects due to variability in fuse characteristics with operating point, temperature and time F1 is connected within the overall feedback loop of the amplifier. The amplifier output is routed to connector P108 via resistor R143 and relay K1. R143 is included to help prevent output stage instability in the presence of capacitive loads. Detailed Description of the 220 V Amplifier The 220 V amplifier has a gain of 100 and provides output voltages of between 22 V and 220 V dc or ac rms at frequencies up to 100 kHz. The amplifier is designed to accommodate a maximum burden of 20 mA dc or ac rms or a maximum capacitive load of 675 pF for ambient temperatures up to 40 °C. Above this temperature, the allowable load capacitance is reduced. To achieve the maximum required voltage swing under ac conditions the output stage is operated from ±375 V supply rails (±PA). These rails are regulated to provide isolation from raw dc supply voltage variations caused by mains fluctuations, transformer regulation and ripple. To minimize output stage power dissipation (particularly under dc output conditions), the positive and negative PA rails can be independently switched to a value of 188 V under firmware control when compatible with the required amplifier output voltage. See Table 2-15 for the supply values as a function of range. Table 2-15. Supply Values as a Function of Ranges Calibrator Output +PA -PA ±22 V to ±110 V dc +188 V -188 V 110 V to 220 V dc +375 V -188 V -110 V to -220 V dc +188 V -375 V 22 V to 101 V ac +188 V -188 V 101 V to 220 V ac +375 V -375 V The amplifier input stages are operated from ±15 V rails. Regulator circuits for the high voltage rails are located on-the A8 High Voltage PCA while the ±15 V rails are derived externally. In the 220 V range relays K3 and K4 route the input signal (V3_3) and it's associated ground (RCOM1) from connector P108 to the inverting and non-inverting inputs respectively of an operational amplifier input stage comprising U3 and U4. The combination of wide bandwidth amplifier U3 and chopper-stabilized amplifier U4 allows wide bandwidth and good DC performance to be achieved simultaneously. Transistors Q31 and Q32, diodesVR22 and VR42 and resistors R129 and R130 form a feedback voltage clamp around the op-amp to ensure the output and inverting input always remain within their linear operating range. This is necessary to prevent conditional large signal instability of the 220 V amplifier resulting from the finite overload recovery time of the op-amp. Dual diode CR30 clamps the op-amp inverting input at approximately ±0.7 V under overload conditions. The output of U3 is fed via R131 to voltage to current converter stage Q53. The transconductance of this stage is set by R199 and emitter bias current is provided by current source Q54. Diode CR29 is included to prevent reverse base-emitter breakdown of Q53 which would otherwise occur under overload conditions. 2-47 57LFC/AN Service Manual The output from the collector of Q53 is fed via common-gate connected high voltage Pchannel mosfet Q52 to the collector/base of Q51. Q52 is necessary to isolate the collector of Q53, which is a low voltage small signal device, from the high voltage associated with the -PA supply rail. Q51 forms the input of a current mirror whose output flows into the collector of Q50. The output/input current ratio of this mirror is defined essentially by the ratio of the values of R198 and R118 and is approximately 4.7. The collector of Q50 is isolated from highvoltage signal excursions by common-gate configured N-channel mosfet stage Q33, and at low frequencies the mirror output current almost entirely flows via the drain of this device. The gate of Q33 is referenced to the -PA supply rail via VR18, and the drain of this device provides the full output voltage swing of the amplifier. Drain bias current for Q33 is supplied by a current source comprising Q47, Q48, CR46 and R194, thus maximising the low frequency current-to-voltage gain of the stage: this current is set at approximately 8 mA. Common base stage Q30 is included to recover mirror output current which would otherwise be lost via the drain-gate capacitance of Q33 at high frequencies. This is necessary to prevent loss of gain and to alleviate distortion caused by variations of drain-gate capacitance with voltage. The signal at the drain of Q33 is then fed to complimentary Darlington emitter follower output transistors Q45/Q27 and Q46/Q44. The output stage bias current is set by the quiescent voltage imposed across the series/parallel combination of resistors R186 to R189: this voltage is the collector-emitter voltage of 'Vbe multiplier' transistor Q49 less the base emitter voltages of Q27, Q44, Q45 and Q46. Resistors R186 to R189 in conjunction with resistors R195, R196 and variable resistor R197 are chosen to allow this current to be set at 18 mA. High-voltage N-channel mosfet devices Q1 and Q25 isolate Q27 and Q45 from the high potentials necessary to obtain the specified Amplifier output voltage swing. The collector-emitter voltage of Q27 and Q45 is set at approximately 12 V by Zener diode VR15 (which is referenced to the amplifier output) and the gate-source voltage of Q1. Bias current for VR15 is supplied by series/parallel resistor combination R95, R96, R98 to R101, R103 and R104 which also serves to set the gate voltage of Q25 at approximately half way between the +PA supply and amplifier output voltages: the voltage presented across Q1 and Q25 is thus shared equally between the two devices. C18 is included to counteract the effect of input capacitance of Q25, thus ensuring effective voltage sharing up to the maximum operating frequency. High-voltage P-channel mosfet devices Q2 and Q29 isolate Q44 and Q46 in a similar manner. Because the voltage difference between the Amplifier output and the ±PA power supply rails is supported almost entirely by Q1, Q2, Q25 and Q29, the bulk of the amplifier output stage power dissipation is liberated in these in devices. Transistor Q26 provides limiting for positive output currents by absorbing further increases in gate-source voltage of Q4 once sufficient voltage is developed across the R105 to turn Q3 on. Q6 provides limiting for negative currents in a similar manner by restricting the gate-source voltage of Q2. The overall gain of the amplifier within the specified operating bandwidth is defined by feedback network R125, R127 and R132 and is given by the expression (R125 + R127)/R132. Stability is ensured by dominant pole compensation provided by local feedback from the emitter of Q46 to the base of Q50 via capacitor C48. Additional open loop frequency response shaping is provided by local feedback around U3/U4 via R281 and C29. Fuse F2 is included to provide limited protection in the event of an external high voltage source being connected to the output terminals. This device is connected within the overall feedback loop of the Amplifier to minimise distortion, particularly at low frequencies, resulting from the non-linear characteristic of the device. 2-48 Theory of Operation A8 High Voltage PCA 2 The amplifier output is routed to connector P108 via fuse F2, resistors R183 and R185, chokes L2 and L2 and relay K1. R183, R185, L2 and L2 are included to help prevent output stage instability in the presence of capacitive loads. Op-Amp U15, transistors Q13 and Q61 and resistors R49, R94 and R97 comprise a precision current mirror whose output from the collectors of Q13 and Q61 is proportional to the current flowing from the +PA supply into the output stage. The input/output ratio of the mirror is defined by the ratio of R49 to the parallel combination of R94 and R97 and is set at a nominal value of 110:1. Low-pass R-C network R235 and C65 restricts the bandwidth of the signal fed to U15 and Darlington connected transistors Q14 and Q62 increase the output voltage capability of the mirror to accommodate the +PA supply. The mirror output is sensed by resistor R58, and C67 is included to provide low-pass filtering so that at high frequencies the resultant voltage represents the average output stage current. Dual FET-input operational amplifier U2, diode CR65, capacitor C92 and resistors R264 and R277 comprise a peak detector circuit that senses the voltage developed across R58 and temporarily holds its peak value. This ensures that at low frequencies the peak value of current, which is more representative of output device dissipation than the average, is sensed. The peak detector output is multiplexed onto the SMUX line via U10 for subsequent A-to-D conversion. The current from the -PA supply into the output stage is monitored in a similar manner to that from the +PA supply. Detailed Hardware Description of the High Voltage Regulator The high voltage regulator circuits provides linear voltage regulation of the raw high voltage dc supplies from the A3 Motherboard PCA to produce the ±PA supply rails required by the 220 V amplifier output stage. The positive and negative outputs may be set to zero or independently set to levels of 188 V or 375 V under firmware control. The regulator has output current limit to protect both the 220 V amplifier and itself in the event of fault and applied short-circuit conditions. Raw unregulated dc supplies +360UNR, +180UNR, -180UNR and -360UNR (having nominal values of +545 V, +270 V, -270 V and -545 V respectively) are presented at connector P108. For a required +PA output voltage of +375 V, control lines +HI/LO_V and +ON/OFF are set low (-14 V) so that transistors Q18, Q20 and Q17 are turned off and pin 2 of analogue switch U20 (SWA) is connected to HVCOM. The output of current source transistor Q21 (approx. 0.8mA) thus flows in resistors R241, R242, R252 and R253 and transistor Q66. Op-amp U21 controls the gate drive to Q66 to maintain the voltage at the junction of R241 and R242 equal to that at the output of 5 V reference U22, and the voltage at the drain of Q66 is therefore set at 379 V due to the potential divider action of R241, R242, R252 and R253. This voltage is applied to the gate of +PA output transistor Q22, resulting in a nominal regulator output voltage of 375 V at the source terminal of the device. Resistors R38, R41 to R43, R76, R78, R81 and R84 form a potential divider chain which sets the gate (and consequently source) voltage of Q7 at approximately half way between the voltages at the +360UNR input and the Regulator output (VR3, VR5, VR6 and VR7 do not conduct as the sum of their breakdown voltages exceeds that appearing at this node in normal operation and Q18 is turned off). The +PA Regulator input/output voltage difference, and consequently output device power dissipation, is thus shared equally between Q7 and Q22, allowing higher input voltages and output currents than if a single output device were used. In this mode, diodes CR11 and CR12 are reverse biased to prevent current flows from the +180UNR raw supply. Zener diodes VR9 and 2-49 57LFC/AN Service Manual VR10 are included to restrict the regulator output voltage if Q66 or any of it's associated components fails. For a required +PA output voltage of +188 V, control line +HI/LO_V is set high (+14 V) and +ON/OFF is set low (-14 V). Transistor Q18 is thus turned on, shorting Zener diodes VR5, VR6 and VR7 and causing diode VR3 to conduct via resistors R38 and R41 to R43. The gate, and consequently source, of Q7 are thus held at approximately 150 V. As this is lower in voltage than the +180UNR input supply, diode CR13 is reverse biased and all regulator input current flows from the +180UNR supply via CR12 into the drain terminal of Q22: the drain potential of Q22 is thus essentially equal to that of the +180UNR supply. In this condition, pin 2 of analogue switch U20 (SWA) is left unconnected to HVCOM and R240 is thus included in series with R241 so that the voltage at the drain of Q66 is now controlled at 192 V. This voltage is applied to the gate of +PA output transistor Q22, resulting in a nominal regulator output voltage of 188 V. For a required +PA output voltage of zero, control line +ON/OFF is set high. This turns on Q17, shorting out shorting the drain terminal of Q66 to ground and resulting in a nominal voltage of zero at this point. It should be noted that the +PA and -PA outputs cannot be set to zero independently as their control lines are derived from the same logic control signal. Current flowing from the +PA output is sensed by R88, the voltage across which is applied to the base and emitter terminals of Q23. The collector current of Q23 is sensed by the parallel combination of VR33 and R171, and the voltage developed is applied to an R-C low-pass filter comprising R168 and C15. The filter output is applied to the noninverting input (pin 5) of one half of dual comparator U9, the inverting input (pin 6) of which is normally held at approximately 3.5 V by current source CR21 and resistor R77. Under normal operation, Q23 does not conduct and. Pin 5 of U9 therefore remains at approximately 0 V. The comparator output (pin 7) therefore pulls low (approximately -14 V), reverse biasing CR36 and allowing the gate voltage of Q17 to be set in accordance with the +ON/OFF line. When the +PA supply output current exceeds a pre-determined overload limit of approximately 90 mA, Q23 rapidly starts to conduct and the filter output begins to rise. If the overload condition persists for longer than approximately 75 ms, the filter output voltage becomes sufficient to cause the comparator output to start to change state. The positive-going comparator output voltage causes Q19 to start to conduct. This results in positive feedback via the inverting input, thus accelerating the change in state. This process terminates when the open-collector output of the comparator is completely inactive. In this state the gate voltage of Q17 is pulled up to approximately 7.5 V by R159 and Q19 is saturated. Q17 is thus turned on, shorting out the drain of Q66 and resulting in the +PA output being reduced to zero. Reducing +PA to zero causes the output current to fall, and consequently Q23 stops conducting. The filter output voltage applied to the non-inverting (pin 5) comparator input therefore starts to fall. When it reaches the level on the inverting input (the collector saturation voltage of Q19) the comparator reverts to its original state. Q17 is again allowed to be turned off by the low (-14 V) +ON/OFF line and the voltage at the drain of Q66 begins to increase slowly towards its normal reference value as capacitor C13 charges. When the regulator output voltage reaches a value sufficient to again cause the overcurrent condition the process repeats, and this cyclical operation continues until the cause of the over-current is removed. Resistor R90 and transistor Q24 comprise a secondary over-current detector, set at approximately 0.5 A, whose function is to protect the Regulator against a short-circuit applied to the +PA output. Collector current flowing in Q24 causes the voltage across 2-50 Theory of Operation A8 High Voltage PCA 2 Zener diode VR39 to increase rapidly towards a limit of 10 V. This voltage is applied to the non-inverting (pin 5) input of U9 without filtering so that in the event of an overload, no intentional delay occurs before the comparator changes state and the supply shutsdown. To provide a safer environment for fault finding of the 220 V amplifier, the high voltage regulator outputs (±PA) my be reduced to approximately ±45 V by re-routing the drain terminals of output transistors Q22 and Q34 to the ±45 V regulated supplies on the A3 Motherboard PCA. This is implemented by setting switch S1 to its alternative position i.e., with the switch actuator set furthest from the connector edge of the A8 High Voltage PCA. The operating principles used to derive the Regulator -PA output are identical to those for the +PA output. The -PA output voltage is set to -188 V or -375 V by low (-14 V) and high (+14 V) states respectively of control line -HI/LO_V, and is set to zero when the ON/OFF assumes it's low (-14 V) state. Note that the +ON/OFF and -ON/OFF lines are derived from the same control signal and therefore the +PA and -PA outputs cannot be set to zero independently. Heat Sink Temperature Measurement The temperature of the heatsinks for 220 V amplifier output devices Q25, Q29, and high voltage regulator output devices Q22 and Q42 are monitored by heatsink mounted integrated circuit temperature sensors U25, U26, U27 and U28. The sensor output voltages are multiplexed onto the SMUX line by U19 via U10 for subsequent A-to-D conversion. Digital Interface and Control The digital interface to the A8 High Voltage PCA comprises an 8-bit data bus (IG_DATA<7..0>), three address lines (ID_ADDR0, ID_ADDR1 and ID_ADDR2), a board select line (IG_CSO) and a write line (IG_WR*). When the board select line is low, U7 routes the IG_WR* signal (which is normally held high) to the clock inputs of 4-bit relay drivers U12 and U13 or one of two 8-bit latches, U14 and U17, as determined by the state of the three address lines. 8-bit data is clocked into the latching inputs of U12 and U13 (which are connected to act as a single 8-bit device), U14 or U17 in response to the IG_WR* line being taken momentarily low, data being latched on the low to high transition. The open-collector outputs of U12 and U13 are grouped in pairs, each pair driving the set and reset coils of one of the four on-board latching relays. The four reset coils are also connected together via diodes CR49 to CR53 so that all relays can be simultaneously reset by pulling the RLY_RST* line low. The outputs of U14 are used to control U10 and U20 directly. Outputs Q5 to Q7 are also translated by quad comparator U8 to produce the ±14 V signals +ON/OFF, -ON/OFF, +HI/LO_V and -HI/LO_V. This process introduces an inversion in deriving +ON/OFF and +HI/LO_V. Outputs Q0 to Q2 of U17 control the output routing for the heatsink temperature monitor IC's via U19. 2-51 57LFC/AN Service Manual A9 Out-Guard CPU PCA The CPU manages all of the internal remote functions including: IEEE-488 and RS-232 remote communication, calibration enable, watchdog timer, serial communication with the FPGA on the A6 Digital Synthesis PCA. See Sheet 1 of the A9 Out-Guard CPU PCA schematic. The main processor (U10) is a Motorola 68306 that runs on code stored in flash memory (See Sheet 2 of the A9 Out-Guard CPU PCA schematic). The processor directs all internal operations in the Calibrator. It receives commands from the IEEE-488 interface. The RS-232 interface is used in the factory for special testing. There are two serial ports. One serial port is used for communication with a host PC. The other port, AUX, can be used as a programmable serial output port. When the Calibrator is used with Fluke’s hand held scope meters, the port may be used to control the scope meter. The CPU communicates with the A6 Digital Synthesis PCA through serial communication lines through J1, a 20-pin cable to the A3 Motherboard PCA. All communication with the A6 Digital Synthesis PCA is through differential transceivers and transformers. The differential drivers reduce noise coupling between the guarded and non-guarded CPU circuits. The transformers isolate the guarded and unguarded circuits. The transformers are found on the A6 Digital Synthesis PCA. See Sheet 7 of the A6 Digital Synthesis PCA schematic. There are several miscellaneous items to note on the A9 Out-Guard CPU PCA. First, there is a watchdog timer circuit, U1. If the CPU loses communication with either the front panel or the A6 Digital Synthesis PCA, the watchdog timer is not signaled which allows a hard reset to the instrument. Secondly, there is the calibration enable switch. When a 57LFC is calibrated, it is recommended that the switch be set to inactivate calibrating the instrument until the normal calibration interval has expired. Finally, a JTAG port is available to allow programming the flash memory through the CPU when changes are made to the software. This can only be used by the factory. Real Time Clock Memory There is over 640 K bytes of static RAM on the CPU board. The RAM has a bank of 128 k x 16 and a bank of 512 k x 16. The is also 512 k x 16 flash memory in U5 and U6. At power-up, the flash is moved into RAM. Program execution is then out of RAM. The real time clock provides the calendar functions for the instrument. If the real-time lock battery wears out, when power off, the instrument will lose its ability to keep track of the calibration cycle. See Sheet 2 of the A9 Out-Guard CPU PCA schematic. IEEE-488 Interface The TMS9914 IEEE-488 IC is used for all remote IEEE-488 communication. There are two buffers that provide the correct driver capability for the IEEE-488 bus. In general, the product complies will all parts of the IEEE-488 standard. Note that U12 and U19 are not installed. See Sheet 3 of the A9 Out-Guard CPU PCA schematic. 2-52 Chapter 3 Calibration and Verification Title Calibration ......................................................................................................... Procedure Architecture.................................................................................. ZERO ........................................................................................................ MAIN ........................................................................................................ DIAG......................................................................................................... Calibration Steps ........................................................................................... RUN .......................................................................................................... Instruction Step (INS) ............................................................................... Reference Step (REF) ............................................................................... NOT .......................................................................................................... Verification Tests............................................................................................... Test Equipment.............................................................................................. Calibrator Configuration and Pre-check........................................................ DC Voltage Test ............................................................................................ AC Voltage Tests .......................................................................................... AC Voltage Accuracy Test ....................................................................... Frequency Accuracy Test.......................................................................... DC Current Test ............................................................................................ AC Current Test ............................................................................................ Current Output Compliance Test................................................................... Voltage Output Compliance Test .................................................................. Harmonic Test Levels for AC Volts.............................................................. Harmonic AC Current Test ........................................................................... External Trigger............................................................................................. Verification Test Check List.......................................................................... Page 3-3 3-3 3-3 3-3 3-3 3-3 3-4 3-4 3-4 3-4 3-5 3-5 3-6 3-7 3-9 3-9 3-10 3-14 3-15 3-17 3-17 3-19 3-20 3-21 3-22 3-1 57LFC/AN Service Manual 3-2 Calibration and Verification Calibration 3 Calibration Calibration of the 57LFC is accomplished using two internal calibration procedures. The first of these is an offset or "zero" calibration and requires no external standards. The second procedure is used to establish range gains and other constants using external standards. The first internal procedure will be referred to as "zero" calibration and the second will be referred to as "main" calibration for the remainder of this discussion. See Table 3-1 for a list of the equipment required by the main calibration procedure. The calibration procedures consist of a number of calibration steps. While the user has no direct access to the procedures or the individual steps that comprise them, an understanding of their structure makes it easy to write an external computer program to utilize them. For this reason, the internal procedure architecture is described in the following section. Procedure Architecture There are three parts to a calibration procedure. Every procedure has an entry point, one or more steps, and an end point. In this section we will describe each of these and its implications for the programmer writing a calibration application. Note In this section, "controller" refers to the computer controlling the Calibrator. The term "@LFC" refers to the IEEE488 address of the Calibrator. The examples shown are in pseudo code. PROC <name> (Defines the procedure entry point) The procedure name is used to define the start of a calibration procedure. There are three (3) PROC definitions for the Calibrator: ZERO, MAIN, and DIAG. The name associated with the PROC declaration is used in conjunction with the CAL_START command to initiate a calibration procedure. The procedure names are defined below. Note that case is ignored. ZERO ZERO (The offset or zero's calibration procedure as described above.) print @LFC "cal_start zero" MAIN MAIN (The main calibration procedure as described above.) print @LFC "cal_start main" DIAG DIAG (The diagnostics procedure as described in that section). print @LFC "cal_start diag" Calibration Steps There are four types of calibration steps: RUN, INS, REF and NOT. Whenever a calibration procedure is running the controller may query the Calibrator to determine which of the four types of steps is currently being executed by the internal calibration engine. To query the Calibrator for the calibration step type, use the CAL_STATE? Command. As described below, the controller is expected to take different actions depending on the internal step type. See the example below: 3-3 57LFC/AN Service Manual print @LFC “CAL_STATE?” input @LFC A$ print A$ (shows RUN) RUN A run step requires no external intervention (input or output) it simply runs an internal function to perform some calibration operation. Zero calibration is composed of an entry point, followed a number of RUN steps and an END. Instruction Step (INS) This step causes the procedure to pause at the current step and an instruction is made available via the CAL_INFO? command. To resume the procedure, a CAL_NEXT command must be issued. This step is used to inform the user that some operator intervention is required, such as an external connection to a measurement standard. Note The CAL_INFO? command is not mandatory. Reference Step (REF) A reference step, like an INS step, causes the procedure to pause and an instruction is made available via the CAL_INFO? command. Additionally, the controller is expected to supply a floating point number. This number is typically a reference reading from an external DMM. As an example, the internal calibration procedure may setup the Calibrator to source 1.9 V. Then a REF step would prompt the user to go to operate. The controller would need to send the operate command and command an external DMM to take a reading. The reading from the DMM would be sent to the Calibrator using a CAL_NEXT command. The Calibrator would use that value to calculate a new calibration constant and then would continue to the next step. See the example below: print @LFC input @LFC print A$ (shows "Go print @LFC INPUT @DMM print @LFC "CAL_INFO?" A$ to operate and measure the expected value.") "OPER"// Go to operate reading// get measurement from DMM "CAL_NEXT" + reading// send DMM reading to LFC NOT NOT simply means that the calibration procedure in no longer running. If the controller determines that the NOT step was returned due to a normal termination of the calibration procedure, a CAL_STORE command MUST be issued to store the newly derived calibration constants into non volatile memory. Once the calibration constants are saved, it is a good idea to reset the instrument using a *RST command For a complete list of remote commands for calibration see Chapter 3 of the 57LFC/AN Operators Manual. 3-4 Calibration and Verification Verification Tests 3 During calibration, it is a good idea to check the Calibrator fault queue after each calibration command. This will alert the user to any problems during the calibration. To check the fault queue, send the command “ERR?” as shown below. print @LFC "ERR?" input @LFC A$ print A$ Verification Tests The verification tests are used as the basis of: • Final product testing performed in manufacturing • Automated test system design • Product acceptance by the end user This section describes the minimum testing necessary to verify with reasonable certainty that the Calibrator is totally functional and will meet its published specifications over the specified environmental conditions and for the specified calibration interval. Any personnel using the verification tests must be familiar with the operation of the Calibrator and the have ability to set up and operate the recommended test equipment. While the verification tests were developed for manual testing, if the test steps listed are followed and test uncertainty ratios are kept above 3:1, automation of the verification test will meet the requirements of verifying the product specifications. XWWarning This instrument is capable of outputting lethal voltages. Observe all safety precautions. To avoid shock, the operator should not electrically contact the Output V or Sense binding posts during operation. Lethal voltages of up to 230 V ac or dc may be present. Whenever the nature of the operation permits, keep one hand away from the equipment to reduce the hazard of current flowing through vital organs of the body. The verification tests are sufficient to insure that the shipped units will meet and/or exceed published specifications over the specified environmental conditions and specified calibration interval. All tests limits are based on specifications measured within 23 oC +/- 3 oC (room temperature) and humidity less than 80%. Any test that fails will be rerun immediately. If the failure repeats, it will be noted as a failure and testing will continue with the next step if possible. Failures will be repaired and then the unit will be retested. Test Equipment The equipment listed in Table 3-1 is for reference only. You can substitute any of the equipment provided adequate measurement accuracy with a test uncertainty ratio of 4:1 if possible. Only equipment that is calibrated and traceable according to the manufacturer specifications may be used for performance verification testing. 3-5 57LFC/AN Service Manual Table 3-1. Recommended Equipment for Calibration and Verification Recommended Equipment Recommended Model Purpose Calibration and Verification Procedure Chapter 3 of the 57LFC/AN Service Manual Define procedure test points and specifications Test Lead Kit Fluke 8508A-LEAD or equivalent Cable interconnect assembly 8-1/2 digit DMM Fluke 8508A DMM or equivalent Measure DC Volts, DC Current, AC Volts, AC Current, and Resistance Precision Calibrator Fluke 5720A or equivalent Characterize 8508 for ac voltage and ac current measurements Harmonic Distortion Analyzer Boonton 1130 or equivalent Measure LF harmonic distortion of ac voltage and current Harmonic Distortion Analyzer Agilent ESA 4411A Spectrum Analyzer or equivalent Measure harmonic distortion of ac voltage for f > 30 kHz Test Controller Computer with an IEEE-488 interface card or equivalent Connect to and communicate with the Calibrator Frequency Measurement Fluke 8508A or counter with 10 Hz to 100 kHz frequency range and 25 ppm frequency uncertainty or equivalent Shunt Resistors (5% 1/8 watt unless noted) 0.1 (1 W), 10, 100, and 1 k Load Resistors (10%) 1.8 (10 W), 40 (0.1 W), 440 (2 W), Compliance testing and 1k (5 W), and 22 k (5 W) Resistor Divider (10% 1/4 W) 2 M/20 k Harmonic testing for AC current Harmonic Testing Calibrator Configuration and Pre-check The Calibrator must be switched on and powered for at least 30 minutes prior to verification testing and the air filter inspected for adequate airflow. Refer to filter inspection and cleaning procedure provided in Chapter 4 for detailed cleaning instructions. Verification can only be performed using a controller as the Calibrator has no front panel controls. Furthermore the Calibrator has no internal hardware adjustments. When powered correctly the Calibrator front interface panel STANDBY LED indicator will illuminate (yellow). When in operate, the OPERATE LED will illuminate (green). If the output voltage goes above 30 V, the warning LED will illuminate (red). If the unit encounters an output fault, both the yellow and red LEDs will light. For example, if in current mode and the load is removed, a fault condition will be indicated since the output compliance voltage will go to a maximum value. Self-test routines are executed at power up that test the internal controller device and memory. Any failure at power up will be displayed with both the yellow and red LEDs lighting. A failure message can be requested over the IEEE-488 bus as part of the instrument status (see Chapter 3 in the 57LFC/AN Operators Manual for additional information). 3-6 Calibration and Verification Verification Tests 3 Confirm Cal Enable (J1) is in the disabled condition before starting the rest of the verification procedures. If the unit passes all tests. Cover the Cal Enable switch with a calibration label. DC Voltage Test The dc voltage amplitude accuracy test verifies the accuracy of dc voltage at the Calibrator front panel output terminals. Use the specifications in Chapter 1 to determine maximum load for testing. Connect the equipment as shown in Figure 3-1 and verify the Calibrator is within the limits shown in Table 3-2. FLUKE 57LFC OPERATE STANDBY 8508A apv004f.eps Figure 3-1. 8508A Connections to the 57LFC for DC Volts Measurement 3-7 57LFC/AN Service Manual Table 3-2. DC Volts Measurement Limits Range 3-8 Amplitude Reading Upper Limit (V) Lower Limit (V) 200.0E-3 0 2.40E-6 -2.40E-6 200.0E-3 219.0E-3 219.0075E-3 218.9925E-3 200.0E-3 -219.0E-3 -218.9925E-3 -219.0075E-3 2 0 2.40E-6 -2.40E-6 2 2.19 2.19003696 2.18996304 2 -2.19 -2.18996304 -2.19003696 20 0 24.00E-6 -24.00E-6 20 10 10.00017920 9.99982080 20 -10 -9.99982080 -10.00017920 20 21.9 21.9003696 21.8996304 20 -21.9 -21.8996304 -21.9003696 200 0 240.00E-6 -240.00E-6 200 219 219.0057984 218.9942016 200 -219 -218.9942016 -219.0057984 Calibration and Verification Verification Tests 3 AC Voltage Tests AC Voltage Accuracy Test The ac voltage amplitude accuracy test verifies the accuracy of ac voltage at the Calibrator front panel terminals. First, use the 5720A to characterize all the points in Table 3-3. Next, connect the equipment as shown in Figure 3-2 and verify the Calibrator is within the limits shown in Table 3-3. FLUKE 57LFC OPERATE STANDBY 8508A apv005f.eps Figure 3-2. 8508A Connections to the 57LFC for AC Volts Measurement 3-9 57LFC/AN Service Manual Table 3-3. AC Volts Measurement Limits Range Amplitude Frequency Reading Upper Limit (V) Lower Limit (V) 20.0E-3 21.9E-3 10 21.93382E-3 21.86618E-3 20.0E-3 21.9E-3 45 21.92401E-3 21.87599E-3 20.0E-3 21.9E-3 20.0E+3 21.92401E-3 21.87599E-3 20.0E-3 21.9E-3 50.0E+3 21.94784E-3 21.85216E-3 20.0E-3 21.9E-3 100.0E+3 22.00208E-3 21.79792E-3 200.0E-3 219.0E-3 10 219.2422E-3 218.7578E-3 200.0E-3 219.0E-3 45 219.1021E-3 218.8979E-3 200.0E-3 219.0E-3 20.0E+3 219.1021E-3 218.8979E-3 200.0E-3 219.0E-3 50.0E+3 219.3824E-3 218.6176E-3 200.0E-3 219.0E-3 100.0E+3 219.6886E-3 218.3114E-3 2 2.19 10 2.19156160 2.18843840 2 2.19 45 2.19076480 2.18923520 2 2.19 20.0E+3 2.19076480 2.18923520 2 2.19 50.0E+3 2.19160640 2.18839360 2 2.19 100.0E+3 2.19478400 2.18521600 20 21.9 10 21.9146560 21.8853440 20 21.9 45 21.9076480 21.8923520 20 21.9 20.0E+3 21.9076480 21.8923520 20 21.9 50.0E+3 21.9146560 21.8853440 20 21.9 100.0E+3 21.9363200 21.8636800 200 219 10 219.146560 218.853440 200 219 45 219.076480 218.923520 200 219 20.0E+3 219.076480 218.923520 200 219 53.88E+3 219.363200 218.636800 200 118 100.0E+3 118.409600 117.590400 Frequency Accuracy Test The specification for frequency is 100 ppm (0.01%). Connect the 8508A to the Calibrator output terminals as shown in Figure 3-3. Then set the Calibrator to 2 V at the output frequencies specified in Table 3-4. Verify that the meter reads within the limits specified on the test record. 3-10 Calibration and Verification Verification Tests 3 FLUKE 57LFC OPERATE STANDBY 8508A Figure 3-3. 8508A Connections to the 57LFC for AC Frequency Measurement apv006f.eps Table 3-4. AC Frequency Values Frequency Value Measured Value Lower Limit Upper Limit 11 Hz 10.999296 Hz 11.000704 Hz 1000 Hz 999.936 Hz 1000.064 Hz 10000 Hz 99993.6 Hz 100006.4 Hz 3-11 57LFC/AN Service Manual FLUKE 57LFC OPERATE STANDBY 8508A apv007f.eps Figure 3-4. 8508A Connections to the 57LFC for 4-Wire Ohms Table 3-5. 4-Wire Ohm Values Nominal Calibrated Value Measured Value Difference Specification 0Ω 640E-6 Ω 1Ω 640E-6 Ω 1.9 Ω 1.280E-3 Ω 10 Ω 2.560E-3 Ω 19 Ω 5.120E-3 Ω 100 Ω 6.40E-3 Ω 190 Ω 12.80E-3 Ω 1.0E+ Ω3 64.0E-3 Ω 1.9E+3 Ω 128.0E-3 Ω 10.0E+3 Ω 640.0E-3 Ω 19.0E+3 Ω 1.280 Ω 100.0E+3 Ω 6.40 Ω 190.0E+3 Ω 12.80 Ω 1.0E+6 Ω 64.0 Ω 1.9E+6 Ω 128.0 Ω 10.0E+6 Ω 640.0 Ω 19.0E+6 Ω 1280.0 Ω *Note: Calibrated ohm values are measured and stored during calibration. These values can be accessed remotely or from the factory test report supplied with the instrument. This measurement assumes four-wire connection. The measured value is made with a Fluke 8508A or equivalent. 3-12 Calibration and Verification Verification Tests 3 FLUKE 57LFC OPERATE STANDBY 8508A Figure 3-5. 8508A Connections to the 57LFC for 2-Wire Compensated Ohms apv008f.eps Table 3-6. 2-Wire Ohm Values Nominal Calibrated Value Measured Value Difference Specification 0Ω 0.0013 Ω 1Ω 0.0013 Ω 1.9 Ω 0.0019 Ω 10 Ω 0.0032 Ω 19 Ω 0.0058 Ω 100 Ω 0.0070 Ω 190 Ω 0.0134 Ω 1.00E+03 Ω 0.0704 Ω 1.90E+03 Ω 0.1344 Ω 1.00E+04 Ω 0.7040 Ω 1.90E+04 Ω 1.4080 Ω 1.00E+05 Ω 7.0400 Ω 1.90E+05 Ω 14.0800 Ω 3-13 57LFC/AN Service Manual DC Current Test The dc current amplitude accuracy test verifies the accuracy of dc current at the Calibrator output terminals. First, use the 5720A to characterize all the points in Table 3-7. Next, connect the 8508A to the appropriate terminals on the Calibrator (as shown in Figure 3-6) and verify the Calibrator is within the limits shown in Table 3-7. Maximum compliance voltage is 4 V in 2.2 A range and 10 V on other ranges. FLUKE 57LFC OPERATE STANDBY 8508A apv009f.eps Figure 3-6. 8508A Connections to the 57LFC for DC Current Measurement Table 3-7. DC Current Readings Range 3-14 Amplitude Reading Upper Limit Lower Limit 200.0E-6 000.0E+0 16.00E-9 -16.00E-9 200.0E-6 219.0E-6 219.082880E-6 218.917120E-6 200.0E-6 -219.0E-6 -218.917120E-6 -219.082880E-6 2.0E-3 0.00E+00 40.0E-9 -40.00E-9 2.0E-3 2.19E-3 2.1907328E-3 2.1892672E-3 2.0E-3 -2.19E-3 -2.1892672E-3 -2.1907328E-3 20.0E-3 0.00E+00 200.00E-9 -200.00E-9 20.0E-3 21.90E-3 21.907168E-3 21.892832E-3 20.0E-3 -21.90E-3 -21.892832E-3 -21.907168E-3 200.0E-3 000.0E+0 2.00E-6 -2.00E-6 200.0E-3 219.0E-3 219.0717E-3 218.9283E-3 200.0E-3 -219.0E-3 -218.9283E-3 -219.0717E-3 2.0 0.00 32.00E-6 -32.00E-6 2.0 2.19 2.1910067 2.1889933 2.0 -2.19 -2.1889933 -2.1910067 Calibration and Verification Verification Tests 3 AC Current Test The ac current amplitude accuracy test verifies the accuracy of AC Current at the Calibrator output terminals. First use the 5720A to characterize all the points in Table 38. Next, connect the equipment as shown in Figure 3-7 and verify the Calibrator is within the limits shown in Table 3-8. Maximum compliance voltage is 4 V in 2.2 A range and 7 V on other ranges FLUKE 57LFC OPERATE STANDBY 8508A apv010f.eps Figure 3-7. 8508A Connections to the 57LFC for AC Current Measurement 3-15 57LFC/AN Service Manual Table 3-8. AC Current Limits Range 3-16 Amplitude Frequency Reading Upper Limit Lower Limit 200.0E-6 219.0E-6 10 219.54848E-6 218.45152E-6 200.0E-6 219.0E-6 20 219.33824E-6 218.66176E-6 200.0E-6 219.0E-6 45 219.30320E-6 218.69680E-6 200.0E-6 219.0E-6 1.0E+3 219.30320E-6 218.69680E-6 200.0E-6 219.0E-6 5.0E+3 219.75264E-6 218.24736E-6 200.0E-6 219.0E-6 10.0E+3 221.35840E-6 216.64160E-6 2.0E-3 2.19E-3 10 2.1929952E-3 2.1870048E-3 2.0E-3 2.19E-3 20 2.1922944E-3 2.1877056E-3 2.0E-3 2.19E-3 45 2.1915936E-3 2.1884064E-3 2.0E-3 2.19E-3 1.0E+3 2.1915936E-3 2.1884064E-3 2.0E-3 2.19E-3 5.0E+3 2.1929952E-3 2.1870048E-3 2.0E-3 2.19E-3 10.0E+3 2.2015328E-3 2.1784672E-3 20.0E-3 21.90E-3 10 21.929952E-3 21.870048E-3 20.0E-3 21.90E-3 20 21.915936E-3 21.884064E-3 20.0E-3 21.90E-3 45 21.915936E-3 21.884064E-3 20.0E-3 21.90E-3 1.00E+3 21.915936E-3 21.884064E-3 20.0E-3 21.90E-3 5.00E+3 21.929952E-3 21.870048E-3 20.0E-3 21.90E-3 10.00E+3 21.959264E-3 21.840736E-3 20.0E-3 21.90E-3 20.00E+3 22.015328E-3 21.784672E-3 200.0E-3 219.0E-3 10 219.27149E-3 218.72851E-3 200.0E-3 219.0E-3 20 219.15936E-3 218.84064E-3 200.0E-3 219.0E-3 45 219.15936E-3 218.84064E-3 200.0E-3 219.0E-3 1.0E+3 219.15936E-3 218.84064E-3 200.0E-3 219.0E-3 5.0E+3 219.45248E-3 218.54752E-3 200.0E-3 219.0E-3 10.0E+3 219.62464E-3 218.37536E-3 200.0E-3 219.0E-3 20.0E+3 220.24928E-3 217.75072E-3 2.0 2.19 10 2.192714880 2.187285120 2.0 2.19 20 2.192714880 2.187285120 2.0 2.19 45 2.19159360 2.18840640 2.0 2.19 1.00E+03 2.19159360 2.18840640 2.0 2.19 5.00E+03 2.2059360 2.1740640 2.0 2.19 10.0E+3 2.2632800 2.1167200 Calibration and Verification Verification Tests 3 Current Output Compliance Test Connect the Calibrator to the 8508A as shown in Figure 3-8. Apply the load to the 8508A terminals. For safety reasons, please observe the power limits of the resistors used in the test. See Table 3-9 for power limits. • Apply the maximum dc current output (1.8 Ω load for 4 V compliance voltage) when set to 2.19 A dc. • Verify that the current remains at the correct limit by measuring the current as described in the resistance accuracy test earlier in this Chapter. FLUKE 57LFC OPERATE STANDBY 8508A 1.8 Figure 3-8. 8508A Connections to the 57LFC for Load Current Compliance Test apv011f.eps Table 3-9. Current Output Compliance Limits Amplitude 2.19 A Frequency 0 Shunt Reading 1.8 Ω Upper Limit 2.1910067 Lower Limit 2.1889933 Voltage Output Compliance Test XWWarning This instrument is capable of outputting lethal voltages. Observe all safety precautions while performing this test. Connect the Calibrator to the 8508A as shown in Figure 3-9. Apply the load to the 8508A terminals. For safety reasons, please observe the power limits of the resistors used in the test. Table 3-10 contains the test limits. • Apply the maximum load (440 Ω for 50 mA) to the dc voltage output when set to 21.9 V dc (using 8508A to measure). • Verify that the voltage is at the correct limit. • Apply the maximum load (440 Ω) to the ac voltage output when set to 100 kHz and 21.9 V rms (using 8508A to measure). • Verify that the voltage is at the correct limit. • Apply the maximum load (11 kΩ for 20 mA) to the dc voltage output when set to 219 V dc (using 8508A to measure). • Verify that the voltage is at the correct limit. 3-17 57LFC/AN Service Manual • Apply the maximum load (11 kΩ) to the ac voltage output when set to 1 kHz and 219 V rms (using 8508A to measure). • Verify that the voltage is at the correct limit. apv012f.eps Figure 3-9. 8508A Connections to the 57LFC for Voltage Compliance Testing Table 3-10. Voltage Output Compliance Limits Range 3-18 Amplitude Frequency Reading Upper Limit Lower Limit 20 V 21.9 0 21.9003696 V 21.8996304 V 20 V 21.9 100.0E+3 21.9363200 V 21.8636800 V 200 V 219 0 219.005798 V 218.994201 V 200 V 219 1kHz 219.1195 V 218.8805 V Calibration and Verification Verification Tests 3 Harmonic Test Levels for AC Volts The harmonic ac voltage test verifies that the output ac signal has a limited amount of noise in the signal. For these tests, the use of the distortion analyzer or spectrum analyzer is required. Follow the vendor's specifications for setting up those instruments. The connection used will depend on which test instrument is used. Figure 10 shows the set up used for a Booton 1130A and Agilent 4411A instrument. The Booton is used below 30 kHz and the Agilent is used above 30 kHz. A set of test limits is provided in Table 3-11. FLUKE 57LFC OPERATE Booton 1130A Resistor Divider with Optional Switch Box STANDBY S1 2M/20K Resistor Divider Hi Input S2 Coax Cables Agilent 4411A Input apv013f.eps Figure 3-10. Harmonic Test Setup 3-19 57LFC/AN Service Manual Table 3-11. Harmonic Test Values for AC Volts Amplitude Frequency Load Reading Maximum Distortion 20.0E-3 10.0E+0 0.600% 20.0E-3 45.0E+0 0.485% 20.0E-3 20.0E+3 0.485% 20.0E-3 50.0E+3 0.600% 20.0E-3 100.0E+3 0.700% 200.0E-3 10.0E+0 0.195% 200.0E-3 45.0E+0 0.080% 200.0E-3 20.0E+3 0.080% 200.0E-3 50.0E+3 0.195% 200.0E-3 100.0E+3 0.245% 2.0 10.0E+0 0.160% 2.0 45.0E+0 0.045% 2.0 20.0E+3 0.045% 2.0 50.0E+3 0.160% 2.0 100.0E+3 0.210% 20.0 10.0E+0 0.160% 20.0 45.0E+0 0.045% 20.0 20.0E+3 0.045% 20.0 50.0E+3 0.210% 20.0 100.0E+3 0.510% 200.0 10.0E+0 0.155% 200.0 45.0E+0 0.055% 200.0 20.0E+3 0.055% 219.0 50.0E+3 0.805% 118.0 100.0E+3 1.008% 2 10 40 Ω 0.160% 2 100.0E+3 40 Ω 0.210% 14.2 10 400 Ω 0.164% 14.2 100.0E+3 400 Ω 0.514% 219 50.0E+3 22000 Ω 0.805% Harmonic AC Current Test The harmonic ac current test verifies that the output ac signal has a limited amount of noise in the signal. A distortion analyzer is required for this test. Follow the vendor's 3-20 Calibration and Verification Verification Tests 3 specifications for setting up those instruments. It is necessary to use a shunt resistor across the Calibrator output. A set of test limits is provided in Table 3-12. See Figure 3-10 for a sample test setup. Table 3-12. Harmonic Test Values for AC Current Amplitude Frequency Shunt Reading Maximum Distortion 219.0E-6 1.0E+3 1000 Ω 0.2783% 219.0E-6 10.0E+3 1000 Ω 1.2283% 2.19E-3 1.0E+3 100 Ω 0.1185% 2.19E-3 10.0E+3 100 Ω 1.0685% 21.9E-3 1.0E+3 10 Ω 0.0928% 21.9E-3 10.0E+3 10 Ω 0.7228% 21.9E-3 20.0E+3 10 Ω 1.0228% 219.0E-3 1.0E+3 1Ω 0.0928% 219.0E-3 10.0E+3 1Ω 0.7228% 219.0E-3 20.0E+3 1Ω 1.0228% 2.0 1.0E+3 0.1 Ω 0.0950% 2.0 10.0E+3 0.1 Ω 2.0250% External Trigger No external trigger mechanism is available on the Calibrator. 3-21 57LFC/AN Service Manual Verification Test Check List Verification Test Procedure Date o o Temperature (23 C +/- 3 C) Serial Number for the Calibrator Under Test AC Mains 120 V/60 Hz Operator Verification Test Procedure Check List Equipment Calibrator Configuration and Pre-check Unit powered for 30 minutes None Switch set to disable calibration None Yellow LED lights on Standby None Green LED lights on Operate None Red LED lights at 30 V ac None Red and Yellow LEDs light when load removed during current output 0.1 Ω shunt resistor or equivalent Output relays disconnect terminals from instrument during self test. None DC Voltage Fluke 8508A or equivalent AC Voltage Frequency Accuracy Fluke 8508A or equivalent ACV Accuracy Fluke 8508A or equivalent DC Current Fluke 8508A or equivalent AC Current Fluke 8508A (characterized by a Fluke 5720) or equivalent Resistance Fluke 8508A or equivalent 2-wire 4-wire Harmonic Test Levels for AC Volts Booton and Agilent Analyzer with resistor divider Harmonic Test Levels for AC Current Booton and Agilent Analyzer with resistor divider External Trigger No external trigger mechanism is available on the Calibrator 3-22 NA Voltage Output Compliance Test Fluke 8508A or equivalent with 440 W (22 V) or 11 kW load resistor (220 V) Current Output Compliance Test Fluke 8508A or equivalent with 1.8 Ω combined shunt resistance Test Results (Pass/Fail) Chapter 4 Maintenance Title Introduction........................................................................................................ Replacing the Fuse............................................................................................. Cleaning the Air Filter ....................................................................................... Replacing PCA Modules ................................................................................... Cleaning the Exterior ......................................................................................... Page 4-3 4-3 4-4 4-6 4-7 4-1 57LFC/AN Service Manual 4-2 Maintenance Introduction 4 Introduction This chapter explains how to perform the maintenance tasks required to keep your calibrator in optimal operating condition. The tasks covered in this chapter include the following. • Replacing the fuse • Cleaning the air filter and external surfaces • Replacing the PCA modules Replacing the Fuse XWCaution To prevent instrument damage, verify that the correct fuse is installed for the line voltage setting. The line power fuse is accessible on the front panel. The fuse rating label to the right of the fuse holder shows the correct replacement fuse rating for each operating voltage. To check or replace the fuse: 1. Disconnect line power. 2. Insert a small screwdriver in the fuse holder release slot and push upward until the fuse compartment pops free. See Figure 4-1. 3. Slide the fuse and fuse holder out of the fuse compartment. 4. Inspect or replace the fuse. 5. Install the fuse compartment in the calibrator. 4-3 57LFC/AN Service Manual J5 E1 J1 CALIBRATION MAINS SUPPLY J5 100 V / 120 V 208 V / 230 V STANDBY J2 CAUTION FOR FIRE PROTECTION 032 REPLACE ONLY WITH A 250 V FUSE OF INDICATED RATING SERIAL 2 TO UUT WARNING: TO AVOID ELECTRIC SHOCK GROUNDING CONNECTOR IN POWER CORD MUST BE CONNECTED J3 SERIAL 1 FROM HOST IEEE-488 E1 OPERATE FUSE T2.0 A 250 V (SB) T1 A 250 V (SB) J4 47- 63 Hz 200 VA MAX Figure 4-1. Replacing the Fuse apw004f.eps Cleaning the Air Filter XWCaution Damage caused by overheating may occur if the area around the fan is restricted, the intake air is too warm, or the air filter becomes clogged. The air filter must be removed and cleaned at least every 30 days, or more frequently if the calibrator is operated in a dusty environment. The air filter is accessible from the rear panel of the Calibrator. To clean the air filter: 1. Disconnect line power. 2. Remove the filter by pulling the filter’s retainer downwards (it hinges at the bottom) and removing the filter element. 3. Clean the filter by washing it in soapy water. Rinse and dry it thoroughly before reinstalling. 4. Reinstall the filter. 4-4 Maintenance Cleaning the Air Filter 4 apw010f.eps Figure 4-2. Accessing the Air Filter 4-5 57LFC/AN Service Manual Replacing PCA Modules Follow the steps below to replace PCA modules in the Calibrator. Refer to Figure 4-3 for a disassembly illustration and the location of the PCA modules. 1. Turn the Calibrator off and disconnect line power. 2. Remove the six screws holding the top cover in place. Remove the top cover. 3. Remove the two screws holding the guard cover in place. Tilt the guard cover up and leave vertical or remove the guard cover. 4. Remove the required module using the module extractors. Top Cover Guard Cover Module apv102f.eps Figure 4-3. Exploded View of the Calibrator 4-6 Maintenance Cleaning the Exterior 4 Cleaning the Exterior To keep the calibrator looking like new, clean the case using a soft cloth slightly dampened with either water or a non-abrasive mild cleaning solution that is not harmful to plastics. XWCaution Do not use aromatic hydrocarbons or chlorinated solvents for cleaning. They can damage the plastic materials used in the Calibrator. 4-7 Chapter 5 List of Replaceable Parts Title Introduction........................................................................................................ How to Obtain Parts........................................................................................... Service Centers .................................................................................................. Parts Lists........................................................................................................... Page 5-3 5-3 5-4 5-4 5-1 57LFC/AN Service Manual 5-2 List of Replaceable Parts Introduction 5 Introduction This Chapter contains a list of field replaceable parts for the Calibrator. Parts are listed by assembly. Each assembly is accompanied by an illustration showing the location of each part and its reference designator. The parts lists give the following information: • • • • An indication if the part is subject to damage by static discharge Description Fluke item number Any special notes (i.e., factory-selected part) The replaceable parts list is limited to removable module assemblies and ancillary hardware such as screws nuts and structural parts that may become damaged or lost during repair or shipping. The Calibrator is intended to be repaired to the component level by Fluke authorized personnel only. All others are encourage to localize faults to the module assembly and then to exchange the assembly through the Fluke Product Exchange System. Note Once parts have been replaced, the Calibrator must be fully adjusted and verified to be within manufacturer’s specification before being returned to normal use. XWCAUTION The Calibrator may be damaged by static discharge if improperly handled. How to Obtain Parts Listed parts may be ordered directly from Fluke Corporation and its authorized representatives by using the part number. Parts price information is available from the Fluke Corporation or its representatives. To ensure prompt delivery of the correct part, include the following information when you place an order: • • • • • Instrument model and serial number Part number and revision level of the PCA containing the part Fluke part number Description (as given under the DESCRIPTION heading) Quantity Refer to Contacting Fluke earlier in this manual for more information. 5-3 57LFC/AN Service Manual Service Centers All Calibrators delivered to the Navy, contractors and subcontractors for the RTCASS program will be repaired and calibrated at the Fluke Technical Support Center in Everett, Washington. Contact Fluke Technical Support at 1-888-993-5853 or by sending a fax to 1-425-446-6390. The address for the Fluke Technical Support Center is: Fluke Technical Support Center 1420 75th ST SW Everett, WA 98203-6256 U. S. A. Once full production is started the following service centers will also maintain and calibrate the Calibrator in Europe. FLUKE NEDERLAND B.V. Customer Support Services Science Park Eindhoven 5108 5692 EC Son Netherlands FLUKE DEUTSCHLAND GMBH Customer Support Services Heinrich Hertz Straße 11 D-34123 Kassel Germany and in Asia, FLUKE SOUTH EAST ASIA PTE LTD. Service Center 83 Clemenceau Avenue #15-15/06 Ue Square 239920 Singapore Parts Lists The following tables list the replaceable parts for the 57LFC System Calibrator. Parts are listed by assembly and alphabetized by reference designator. Each assembly is accompanied by an illustration showing the location of each part and its reference designator. 5-4 List of Replaceable Parts Parts Lists 5 Table 5-1. Final Assembly Ref Des Description Part Number Qty A1 LED PCA 2096773 1 A3 MOTHERBOARD PCA 2048925 1 A5 OHMS PCA 2048887 1 A6 DIGITAL SYNTHESIS PCA 2116745 1 A7 CURRENT , PCA 2048916 1 A8 HIGH VOLTAGE PCA 2048868 1 A9 OUT-GUARD CPU PCA 2110808 1 F1 FUSE,.25X1.25,2A,250V,SLOW 109181 1 F2 FUSE,.25X1.25,1A,250V,SLOW 109272 1 H1 WASHER, LOW THERMAL #8 859939 12 H2 NUT, LOW THERMAL, 8-32 850334 14 H3 NUT,HEX,ELASTIC STOP,STL,10-32,.375 944350 4 H4 SCREW,6-32,.250,PAN,PHILLIPS,STEEL,ZINC-CLEAR,LOCK 152140 17 H5 WASHER,FLAT,STL,.203,.434,.031 110262 4 H6 CONNECTOR, ACC,MICRO-RIBBON,SCREW LOCK 854737 2 H7 SCREW,FHU,P,SS,6-32,.312 867234 2 H8 SCREW,FHU,P,LOCK,MAG SS,6-32,.250 320093 17 H9 NUT,HEX,BR,1/4-28 110619 1 H10 SCREW,6-32,.375,PAN,PHILLIPS,STEEL,ZINC-CLEAR,LOCK 152165 14 H11 SCREW,6-32,1.250,PAN,PHILLIPS,STEEL,ZINC-CLEAR,LOCK 159756 4 H12 SCREW,CAP,SCKT,SS,8-32,.375 295105 20 H13 2 3/4 SCREW 10-32, MODIFIED 2095974 4 H14 CONNECTOR ACCESSORY,D-SUB JACK SCREW,4-40,.250 L,W/FLAT WASHER 1777348 4 H15 WASHER,LOCK,SPLIT,STL,.255,.491,.062 111518 4 LF1 POWER ENTRY MODULE,LINE FILTER,A/C INLET,ON/OFF SWITCH,1POLE,4A,250VAC,BULK 2065010 1 LF2 POWER ENTRY MODULE,CUSTOM FUSE DRAWER,MARKINGS 100 120 208 230, BULK 2065022 1 MP1 OUTPUT BLOCK DECAL 2100381 1 5-5 57LFC/AN Service Manual Table 5-1. Final Assembly (cont) Ref Des 5-6 Description Part Number Qty MP2 BINDING POST-RED 886382 2 MP3 BINDING POST-BLACK 886379 2 MP4 BINDING POST-PURPLE 886361 1 MP5 BINDING POST-BLUE 886366 1 MP6 GASKET, FRONT PANEL 627072 4 MP7 SHIM,TRANSFORMER 625985 1 MP8 HANDLE,INSTRUMENT, GRAY #7 886333 4 MP9 CLAMP,CABLE,.50 ID,ADHESIVE MOUNT 688629 1 MP10 FAN ASSEMBLY 2096806 1 MP11 SHOCK ABSORBER 878983 2 MP12 EXTRUSION, SIDE 2113208 2 MP13 BOTTOM FOOT, MOLDED, GRAY #7 868786 4 MP14 BINDING POST, STUD, PLATED 102707 1 MP15 BINDING HEAD, PLATED 102889 1 MP16 7 INCH CORNER 2065186 4 MP17 AIR FILTER 945287 1 MP18 TRANSFORMER 2066205 1 MP19 INSERT, PLASTIC SIDE 937276 2 MP20 GROUND STRIP,BECU FINGERS,ADHES,.32 W,12.5 L 601762 4 MP21 GROUND STRIP,CU FINGERS,.32,12.50 601770 4 MP22 FRONT PANEL DECAL 2097147 1 TM1 57LFC/AN CD ROM 2103419 1 W1 CABLE ASSEMBLY, MOTHERBOARD 2065343 1 W2 LINE CORD,NORTH AM,10A,5-15/IEC,18/3,SVT,7.5 FT 284174 1 W3 TRANSFORMER GROUND CABLE 2095956 1 List of Replaceable Parts Parts Lists 5 H8 A6,H4,MP9 H4 A5,H4 A7,H4 A8,H4,H8 H13 H5 MP17 W3 MP6 MP7 H9 MP16 MP8 H12 MP12 H2 MP18 H4 A9 H4 MP19 A1 A3 MP1 LF1,LF2,F1 H8 MP20 MP21 H7 MP10 H11 MP14,MP15 H14 H6 H4 H22 H10 H4 H10 MP2, H1, H2 H4 MP3, H1, H2 MP4, H1, H2 H1, H2 W1,H4 H8 MP13 57LFC-120 (1 of 2) apv050f.eps Figure 5-1. Final Assembly 5-7 57LFC/AN Service Manual W3 H2 MP14,H9 57LFC-120 (2 of 2) apv051f.eps Figure 5-1. Final Assembly (cont) 5-8 List of Replaceable Parts Parts Lists 5 Table 5-2. A1 LED PCA Ref Des Description Part Number Qty DS1 LED,RED,RIGHT ANGLE,3.0 MCD 927389 1 DS2 LED,YELLOW,HLMP-1401,2.2MCD,10MA,1.5 / 2.4V,60 DEG VIEW ANGLE,T1 RT ANGLE,BULK 914242 1 DS3 LED,GREEN,RIGHT ANGLE,2.6 MCD 944801 1 MP1 LED, PCB 2096764 1 N/A LED CABLE 2100054 1 N/A CABLE ACCESSORY,CABLE ACCESS,TIE,4.00L,.10W,.75 DIA 172080 2 57LFC-4001 (1 of 1) apv052f.eps Figure 5-2. A1 LED PCA 5-9 57LFC/AN Service Manual Table 5-3. A3 Motherboard PCA Ref Des Part Number Qty 605441 4 C2 CAPACITOR, SMR,CAP,CER,0.1UF,+-10%,50V,X7R,1206 C4-6 C8 C11-12 C17-18 C20-27 C29 C3235 C38 C41 C4546 C48-49 C51-52 C55-56 C58 C60 C62-68 C75 C7982 C88-89 C95-96 C99-100 C102-107 C116-120 C122 605292 64 C10 C57 C59 CAPACITOR, CERAMIC,100PF,+-5%,100V,C0G,0805,TAPE 601028 3 C14 CAPACITOR, SMR,CAP,CER,10PF,+-5%,50V,C0G,0805 494781 1 C28 C3031 CAPACITOR, SMR,CAP,CER,0.22UF,+-10%,25V,X7R,1206 106625 3 822403 4 C1 C3 C15 C19 Description CAPACITOR, SMR,CAP,TA,4.7UF,+-10%,35V,6032 C36-37 CAPACITOR, R05A,CAP,AL,47UF,+-20%,50V,SOLV PROOF C50 C108 5-10 C39 C4344 C61 C76 C98 CAPACITOR, SMR,CAP,TA,10UF,+-20%,25V,6032 927814 6 C40 C42 C77 C85 CAPACITOR, R05A,CAP,AL,100UF,+-20%,16V,SOLV PROOF 816850 4 C47 C70 CAPACITOR, CAP,AL,15000UF,+-20%,16V,25X30 803764 2 C53 C87 CAPACITOR, CAP,AL,47000UF,+-20%,16V 601259 2 C54 C71 CAPACITOR, CERAMIC,0.01UF,+-10%,50V,X7R,0805,TAPE 106146 2 C69 C78 C86 CAPACITOR, CAP,AL,2200UF,+-20%,25V,SOLV PROOF 782383 3 C72 C90 C93-94 CAPACITOR, ELECTROLYTIC,ALUMINUM,3300UF,+20%,35V,22X25,BULK 2065600 4 List of Replaceable Parts Parts Lists 5 Table 5-3. A3 Motherboard PCA (cont) Ref Des Part Number Qty 782532 4 C83 C101 CAPACITOR, CAP,AL,330UF,+-20%,100V,SOLV PROOF 816785 2 C84 C97 C121 CAPACITOR, SMR,CAP,CER,0.1UF,+-10%,100V,X7R,1206 804325 3 C109 CAPACITOR, R05A,CAP,POLYES,1UF,+-10%,50V 733089 1 CR1-2 DIODE,SI,125V,200MA,DO-35 802550 2 CR3 CR5 CR12 CR14 CR16-17 CR20-21 CR23 CR26 CR28-29 CR31 CR34-36 CR38-39 CR41-43 CR48 CR50 CR52-59 CR63 CR68-69 CR89 CR92 DIODE,SI,PN,S1G,400V,1A,1.8US,DO-214AC,TAPE 107573 36 CR4 CR45 DIODE,SI,PN,BAV199,70V,215MA,3US,DUAL,SERIES,SOT-23,TAPE 605805 2 CR6-11 CR13 CR15 CR37 CR40 CR44 CR47 CR79-80 CR88 DIODE,SI,DUAL,50V,250MA,SOT-23 851659 15 CR18-19 CR24-25 CR33 CR49 CR90-91 DIODE,SI,SCHOTTKY,40V,1A,DO-214AB 605821 8 C73-74 C91-92 Description CAPACITOR, CAP,AL,47UF,+-20%,400V,SOLV PROOF 5-11 57LFC/AN Service Manual Table 5-3. A3 Motherboard PCA (cont) Ref Des 5-12 Description Part Number Qty CR22 CR27 CR60-61 CR64-65 DIODE,SI,SCHOTTKY,40V,3A,DO-204AE 604546 6 CR46 CR66-67 DIODE,SI,PN,DF01S,100V,1A,BRIDGE,4 PIN SURFACE MOUNT,3530,TAPE 912456 3 CR51 CR62 DIODE BRIDGE,SI,200V,1.5A,SIP 296509 2 CR70-76 CR78 DIODE,SI,1KV,1A,DO-41 707075 8 CR77 DIODE BRIDGE,SI,800V,1A,SIP 341016 1 CR81-82 DIODE,SI,DUAL,70V,50MA,SOT-23 742544 2 CR83-87 DIODE,SI,SCHOTT,DUAL,30V,200MA,SOT-23 942594 5 E12-16 NUT,BROACH,STL,6-32 393785 5 F1-6 FUSE,8X8.5MM,0.2A,250V,SLOW,RADIAL 851949 6 H1-16 RIVET,AL,.089 DIA,.250 L,SEMI-TUBULAR,OVAL HEAD,DEEP HOLE 838482 16 J1 HEADER,2 ROW,2MMCTR,RT ANG,20 PIN 686725 1 J6 HEADER,2 ROW,2MMCTR,RT ANG,20 PIN 686725 1 J105-108 J205-208 CONNECTOR,DIN41612,TYPE C,64 SCKT 807818 8 K1 K3-7 K9-11 RELAY,ARMATURE,2 FORM C,5VDC,LATCH 603001 9 K2 RELAY,ARMATURE,4 FORM C,5V,LATCH 715078 1 K8 RELAY,ARMATURE,2 FORM C,5 VDC,LATCH 910773 1 L1-10 CHOKE,38.4UH,6TURN,6160A-8002,BULK 320911 10 MP1 PCB, MOTHERBOARD 2048831 1 MP15-18 CONNECTOR, ACC,DIN41612,KEY 832733 4 P1 HEADER,1 ROW,.156CTR,8 PIN 385435 1 P2 HEADER,1 ROW,.156CTR,16 PIN 831370 1 P3 CONNECTOR, MATE-N-LOK,HEADER,8 PIN 570515 1 P4 HEADER,1 ROW.100CTR,RT ANG,3 PIN,FRICTION LOCK 2083751 1 P5 HEADER,1 ROW,.100CTR,3 PIN 845334 1 P8 HEADER,1 ROW,.100CTR,4 PIN 631184 1 List of Replaceable Parts Parts Lists 5 Table 5-3. A3 Motherboard PCA (cont) Ref Des Description Part Number Qty P201 CONNECTOR,HEADER,1 ROW,.156 CTR,RT ANG,LOCKING RAMP,3 PIN,BULK 2137917 1 P202 CONNECTOR,HEADER,1 ROW,.156 CTR,RT ANG,LOCKING RAMP,5 PIN,BULK 2137921 1 Q1-2 TRANSISTOR,SI,PNP,2N3906,40V,200MA,250MHZ,625MW,AMMO BOX,TO-92,TAPE 698233 2 Q3 Q6 Q17 TRANSISTOR,SI,PNP,MMBT3906,40V,200MA,250MHZ,225MW,SOT23,TAPE 742684 3 Q4-5 TRANSISTOR,SI,NPN,60V,350MW,SOT-23 742676 2 Q7-8 TRANSISTOR,SI,NPN,2N3904,60V,200MA,300MHZ,625MW,AMMO BOX,TO-92,TAPE 698225 2 Q12 TRANSISTOR,SI,NPN,300V,1W,TO-92 722934 1 Q13 TRANSISTOR,SI,PNP,2N5401,160V,600MA,100MHZ,350MW,AMMO BOX,TO-92,TAPE 698274 1 Q18 TRANSISTOR,SI,PNP,2N6520,350V,500MA,40MHZ,625MW,TO-92,TAPE 602961 1 Q19 THYRISTOR,SI,TRIAC,VBO=200V,8.0A 413013 1 R1-2 R9 R12 R1417 R26 R66-67 RESISTOR, SMR,RES,CERM,2K,+-1%,.125W,100PPM,1206 807172 11 R6 RESISTOR, SMR,RES,CERM,32.4,+-1%,0.1W,100PPM,0805 641974 1 R7 R13 R30 R60 R62 R71 R75 RESISTOR, SMR,RES,CERM,1K,+-1%,.125W,100PPM,1206 783241 7 R5 R8 RESISTOR, SMR,RES,CERM,10,+-1%,.125W,100PPM,1206 867676 2 R11 R32 R53 R58 R69 R7982 R87 R109-110 R113 RESISTOR, SMR,RES,CERM,4.99K,+-1%,.125W,100PPM,1206 604345 13 R18-19 RESISTOR, SMR,RES,CERM,1K,+-5%,1W,200PPM,2512 601176 2 R20 R27 R111 RESISTOR, CERMET,100,+-1%,0.125W,100PPM,1206,TAPE 867494 3 5-13 57LFC/AN Service Manual Table 5-3. A3 Motherboard PCA (cont) Ref Des 5-14 Part Number Qty R21 R23 RESISTOR, SMR,RES,CERM,49.9K,+-1%,.125W,100PPM,1206 R28 R116 836379 4 R22 801415 1 R24 R115 RESISTOR, CERMET,150K,+-1%,0.125W,100PPM,1206,TAPE 867697 2 RESISTOR, SMR,RES,CERM,100K,+-1%,.125W,100PPM,1206 R25 R29 R33 R78 R83-85 R88 R114 769802 9 R31 R117 RESISTOR, SMR,RES,CERM,499K,+-1%,.125W,100PPM,1206 821678 2 Description RESISTOR, SMR,RES,CERM,453,+-1%,.125W,100PPM,1206 R34 R36 R40-41 R59 R68 R70 R7374 R77 R94-95 R100 R107-108 R112 R118-119 RESISTOR, SMR,RES,CERM,10K,+-1%,.125W,100PPM,1206 769794 18 R35 R72 RESISTOR, SMR,RES,CERM,3.01K,+-1%,.125W,100PPM,1206 604329 2 R42-43 R86 R120-123 RESISTOR, SMR,RES,CERM,1,+-5%,.125W,400PPM,1206 690492 7 R44-45 R48 R57 RESISTOR, SMR,RES,CERM,4.99,+-1%,.125W,400PPM,1206 603271 4 R46-47 RESISTOR, SMR,RES,CERM,2.2M,+-5%,.125W,200PPM,1206 811778 2 R49 R54 RESISTOR, SMR,RES,CERM,100,+-5%,.125W,200PPM,1206 746297 2 R50 R52 RESISTOR, SMR,RES,CERM,200,+-1%,.125W,100PPM,1206 772798 2 R51 RESISTOR, SMR,RES,CERM,604,+-1%,.125W,100PPM,1206 644689 1 R55-56 R61 RESISTOR, SMR,RES,MF,90K,+-0.1%,0.125W,25PPM,1206 106374 3 R63 RESISTOR, METAL FILM,15K,+-0.1%,0.1W,25PPM,0805,TAPE 1274218 1 R64-65 R91-92 RESISTOR, A52R,RES,CF,560K,+-5%,0.5W 640364 4 R76 RESISTOR, A73R,RES,CERM,10K,+-5%,2W,100PPM 650405 1 List of Replaceable Parts Parts Lists 5 Table 5-3. A3 Motherboard PCA (cont) Ref Des Description Part Number Qty R89-90 RESISTOR, R05A,RES,CF,1,+-5%,0.25W 867866 2 R93 RESISTOR, A73R,RES,CERM,560,+-5%,2W,100PPM 643764 1 R124-125 RESISTOR, SMR,RES,CERM,86.6,+-1%,0.1W,100PPM,0805 106929 2 RT1 RT35 RT7-12 THERMISTOR, THERMISTOR,DISC,0.18,25C 875273 10 RT2 RT6 THERMISTOR, PTC,0.02,30V,2W,3A HOLD,6A TRIP,RADIAL,BULK 2075107 2 RV1-5 VARISTOR,22V,+-20%,1.0MA 500777 5 TP7 TP14 CONNECTOR,TERMINAL,TEST POINT,1510,TAPE TP18 TP24 TP27 TP29 602125 6 U2 IC,OP AMP,AD744J,+-4.5 TO +-18V,2MV OFFSET,6MHZ,HI SLEW RATE,SO8,TAPE 629992 1 U3 IC,CMOS,3-8 LINE DCDR W ENABLE,SOIC 783019 1 U4 IC,CMOS,HEX INVERTER,UNBUFFERED,SOIC 806893 1 U5-6 U8-9 IC,BIMOS,4 CHNL DRVR W/LTCH,SOIC U28-29 929781 6 U7 IC,CMOS,OCTAL D F/F,+EDG TRG,SOIC 866798 1 U10 IC,COMPARATOR,QUAD,14 PIN,SOIC 741561 1 U11 U18 DUAL OP-AMP 1756700 2 U12 U2324 IC,COMPARATOR,DUAL,LOW PWR,SOIC 837211 3 U13 HEATSINK ASSEMBLY 2114956 1 U14 HEATSINK ASSEMBLY 2114963 1 U15 U19 HEATSINK ASSEMBLY 2114939 2 U16 HEATSINK ASSEMBLY 2114988 1 U17 HEATSINK ASSEMBLY 2114995 1 U20 HEATSINK ASSEMBLY 2114942 1 U21 HEATSINK ASSEMBLY 665562 1 U22 HEATSINK ASSEMBLY 2115019 1 U25 HEATSINK ASSEMBLY 2114921 1 5-15 57LFC/AN Service Manual Table 5-3. A3 Motherboard PCA (cont) Ref Des 5-16 Description Part Number Qty U27 IC,ANALOG SWITCH,DG444,+12 TO +-20V,85 OHMS,SPST,QUAD,NC,LOW LEAKAGE,SO16,TAPE 688457 1 U30 IC,TEMP SENSOR,LM35D,4-30V,+-2C,10MV/C,TO-92,BULK 2111629 1 U31 HEATSINK ASSEMBLY WITH 2-MJE15028 XSTRS 2065328 1 U32 HEATSINK ASSEMBLY WITH 2-MJE15029 XSTRS 2065337 1 U33-34 HEATSINK ASSEMBLY 2114974 2 VR1-2 ZENER,UNCOMP,56V,5%,2.2MA,0.4W 832568 2 VR3 ,ZENER,COMP,6.4V,2%,20PPM,1MA 419036 1 VR4-5 VR16 ZENER,UNCOMP,MMBZ5245B,15V,5%,8.5MA,225MW,SOT-23,TAPE 837187 3 VR6 VR9 ZENER,UNCOMP,MMBZ5235B,6.8V,5%,20MA,225MW,SOT-23,TAPE 837195 2 VR7-8 ZENER,UNCOMP,MMBZ5251B,22V,5%,5.6MA,225MW,SOT-23,TAPE 831230 2 VR10 VR13 ZENER,UNCOMP,SMBJ12A,12V,5%,1MA,600W,TRANSIENT SUPRESSOR,SMB,TAPE 2002382 2 VR11-12 ZENER,UNCOMP,1.5SMC47A,47V,5%,1MA,4W,TRANSIENT SUPRESSOR,SMC,TAPE 2086534 2 VR14-15 ZENER,UNCOMP,1.5SMC20A,20V,5%,1MA,1.5KW,TRANSIENT SUPRESSOR,SMC,TAPE 2102456 2 VR17 ZENER,UNCOMP,1SMA24CA,24V,5%,1MA,1W,TRANSIENT SUPRESSOR,SMA,TAPE 1572981 1 List of Replaceable Parts Parts Lists 5 57LFC-4003 apv053f.eps Figure 5-3. A3 Motherboard PCA 5-17 57LFC/AN Service Manual Table 5-4. A5 Ohms PCA Ref Des CAPACITOR, SMR,CAP,TA,10UF,+-20%,25V,6032 Part Number Qty 927814 12 CAPACITOR, SMR,CAP,CER,0.1UF,+-10%,50V,X7R,1206 C2-17 C19-21 C23-36 C38 C40 C43-45 C49 C5160 C6566 C69 C71-73 C75 C7778 C81 C84 C8687 C8992 C9899 605292 68 C22 CAPACITOR, SMR,CAP,CER,0.047UF,+-20%,50V,X7R,1206 782615 1 C37 C74 C76 C93 CAPACITOR, CERAMIC,100PF,+-5%,100V,C0G,0805,TAPE 601028 4 C41 C46 C63-64 C67-68 CAPACITOR,CAP,AL,1000UF,+-20%,16V,SOLV PROOF 837468 6 C79-80 C94-95 CAPACITOR, SMR,CAP,CER,0.1UF,+-10%,100V,X7R,1206 804325 4 C100 CAPACITOR, SMR,CAP,CER,68PF,+-2%,50V,C0G,0805 802090 1 CR1-3 CR7-8 SMR,DIODE,SI,DUAL,50V,250MA,SOT-23 851659 5 DIODE,SI,PN,DF01S,100V,1A,BRIDGE,4 PIN SURFACE MOUNT,3530,TAPE 912456 1 CR4 CR5-6 DIODE,MBRS140 SMR,DIODE,SI,SCHOTTKY,40V,1A,DO-214AB 605821 2 CR9-10 CR13 CR16 DIODE,SI,PN,BAV199,70V,215MA,3US,DUAL,SERIES,SOT-23,TAPE 605805 4 CR11 CR15 CR17-18 DIODE,SI,PN,S1G,400V,1A,1.8US,DO-214AC,TAPE 107573 4 H1-4 RIVET,AL,.089 DIA,.344 L,SEMI-TUBULAR,OVAL HEAD 838458 4 C1 C18 C39 C42 C47-48 C82-83 C85 C88 C96-97 5-18 Description List of Replaceable Parts Parts Lists 5 Table 5-4. A5 Ohms PCA (cont) Ref Des Description K1 K6-7 RELAY,ARMATURE,2 FORM C,5VDC,LATCH K15 K2023 K2526 K3637 K40 Part Number Qty 603001 13 K2-5 K814 K1619 K2735 K3839 K4143 RELAY,ARMATURE,4 FORM C,5V,LATCH 715078 29 K24 RELAY,ARMATURE,2 FORM C,5 VDC,LATCH 910773 1 L1-3 INDUCTOR,BEAD,95 OHMS@100MHZ,1ADC,1MOHM,3612,TAPE 867734 3 MP1 PCB, OHMS 2048822 1 MP4-5 EJECTOR, EJECTOR,PWB,NYLON 494724 2 P105 P205 CONNECTOR, DIN41612,TYPE C,RT ANG,64 PIN 807800 2 Q1 PNP,MPS6562 R05A,TRANSISTOR,SI,PNP,25V,1.5W,T0-92 698290 1 Q2 NPN R05R,TRANSISTOR,SI,NPN,25V,1.5W,SEL,TO-92 685404 1 Q3 MOSFET,P-CHANNEL, TRANSISTOR,SI,P-MOS,ENHANCEMENT,TO-72 741058 1 MOSFET,SI,N,SD210,30V,50MA,45 OHMS,300MW,DMOS,LOW CAPACITANCE,TO-72,BULK 394122 1 Q4 TRANSISTOR,SI,PNP,2N5401,160V,600MA,100MHZ,350MW,AMMO BOX,TO-92,TAPE 698274 1 Q5 Q6 NPN,MPSA42 R05A,TRANSISTOR,SI,NPN,300V,1W,TO-92 722934 1 R1 R4-5 R28 RESISTOR, SMR,RES,CERM,2.2M,+-5%,.125W,200PPM,1206 811778 4 R2 R14 R17 R22 R46-47 RESISTOR, CERMET,100,+-1%,0.125W,100PPM,1206,TAPE 867494 6 RESISTOR, SMR,RES,CERM,1K,+-1%,.125W,100PPM,1206 R3 R11 R15 R2526 R31 R42 R6566 783241 9 R6-9 R68-69 867676 6 RESISTOR, SMR,RES,CERM,10,+-1%,.125W,100PPM,1206 5-19 57LFC/AN Service Manual Table 5-4. A5 Ohms PCA (cont) Ref Des Description R10 R12- RESISTOR, SMR,RES,CERM,10K,+-1%,.125W,100PPM,1206 13 R1821 R30 R48-53 R67 5-20 Part Number Qty 769794 15 R16 R23 R43-45 R63 RESISTOR, SMR,RES,CERM,4.99K,+-1%,.125W,100PPM,1206 604345 6 R27 RESISTOR, SMR,RES,MF,10K,+-0.5%,.125W,10PPM,1206 687407 1 R40-41 RESISTOR, SMR,RES,CERM,2K,+-1%,.125W,100PPM,1206 807172 2 R54-55 RESISTOR, SMR,RES,CERM,24.9K,+-1%,.125W,100PPM,1206 867689 2 R56-57 R64 RESISTOR, SMR,RES,CERM,100K,+-1%,.125W,100PPM,1206 769802 3 R58-61 RESISTOR, SMR,RES,CERM,15K,+-1%,.125W,100PPM,1206 769810 4 T1 POWER TRANSFORMER,16.5V-17VCT 625977 1 TP4 TP10 CONNECTOR,TERMINAL,TEST POINT,1510,TAPE 602125 2 U1-16 BIMOS 5800, SMR,IC,BIMOS,4 CHNL DRVR W/LTCH,SOIC 929781 16 U17 CMOS 1151,IC,OP AMP,CHOPPER,DUAL,INT CAPS,8PDIP 929539 1 U18 U20 57LFC-4322,HEATSINK ASSEMBLY 2115004 2 U19 CMOS TLC2652 SMR,IC,OP AMP,CHOPPER STAB,PRECISION,SO8 642741 1 U21-23 U28 U32 IC,ANALOG SWITCH,DG444,+12 TO +-20V,85 OHMS,SPST,QUAD,NC,LOW LEAKAGE,SO16,TAPE 688457 5 U24 BIPOLAR OP284 SMR,IC,OPAMP,DUAL,PRECN,RAIL-RAIL I/O,SO8 642691 1 U25 BIFET AD823 SMR,IC,OP AMP,DUAL,RAIL-RAIL,16 MHZ,SO8 642709 1 U26-27 U31 BIPOLAR AD707K SMR,IC,OPAMP,ULOW DRIFT,LOW NOISE,SO8 887120 3 U33-34 CMOS 74HCU04 SMR,IC,CMOS,HEX INVERTER,UNBUFFERED,SOIC 806893 2 U35 U39 CMOS 74HC374 SMR,IC,CMOS,OCTAL D F/F,+EDG TRG,SOIC 866798 2 U36 BIPOLAR 339 SMR,IC,COMPARATOR,QUAD,14 PIN,SOIC 741561 1 U37-38 CMOS 74HC138 SMR,IC,CMOS,3-8 LINE DCDR W ENABLE,SOIC 783019 2 IC,OP AMP,OPA129,+-5 TO +-18V,+-2MV OFFSET,1MHZ,DIFET,SO8,TAPE 1644333 1 U40 IC,OP AMP,AD825,+-5V TO +-15V,2MV OFFSET,18MHZ,JFET,SO8,TAPE 2115379 1 U41 VR1 BIPOLAR 4040 SMR,IC,V REF,SHUNT,2.5 V,1%,150 PPM,SOT23 930065 1 List of Replaceable Parts Parts Lists 5 Table 5-4. A5 Ohms PCA (cont) Ref Des Description Part Number Qty VR3-4 ZENER,UNCOMP,MMBZ5233B,6V,5%,20MA,225MW,SOT-23,TAPE 837161 2 Z1 THIN FILM, HERM, RESISTANCE REF. 2063764 1 Z2 THIN FILM, HERM, RESISTANCE REF 2063675 1 Z3 THIN FILM, HERM, RESISTANCE REF. 2063701 1 Z4 THIN FILM, HERM, RESISTANCE REF. 2063735 1 Z5 R-NET, THIN FILM, ASSEMBLY 626496 1 5-21 57LFC/AN Service Manual 57LFC-3005 apv054f.eps Figure 5-4. A5 Ohms PCA 5-22 List of Replaceable Parts Parts Lists 5 Table 5-5. A6 Digital Synthesis PCA Ref Des Description Part Number Qty C1 C3-6 CAPACITOR, SMR,CAP,CER,0.1UF,+-10%,50V,X7R,0805 C8-16 C18-23 C26-28 C42-43 C45-46 C50 C54 C60 C70 C72-77 C79 C8184 C8695 C97101 C104105 C107109 C111116 C119126 C133134 690500 78 C2 C35 CAPACITOR, SMR,CAP,CER,10PF,+-5%,50V,C0G,0805 494781 2 C7 CAPACITOR, SMR,CAP,CER,4700PF,+-10%,50V,X7R,1206 832279 1 C17 CAPACITOR, SMR,CAP,CER,3.3PF,+-0.25PF,50V,C0G,0805 942560 1 C24 C41 CAPACITOR, SMR,CAP,CER,33PF,+-5%,50V,C0G,0805 603172 2 C25 C51 C57 C59 C62-68 C96 CAPACITOR, SMR,CAP,TA,10UF,+-20%,25V,6032 927814 12 C29 C32- CAPACITOR, SMR,CAP,CER,2200PF,+-5%,50V,C0G,0805 33 942524 3 C30-31 C36-37 CAPACITOR, CERAMIC,100PF,+-5%,100V,C0G,0805,TAPE 601028 4 C34 CAPACITOR, SMR,CAP,CER,100PF,+-1%,100V,C0G,1206 644812 1 C38-39 CAPACITOR, SMR,CAP,CER,330PF,+-5%,50V,C0G,0805 512038 2 C40 C117 CAPACITOR, SMR,CAP,CER,1000PF,+-1%,50V,C0G,1206 867668 2 C44 CAPACITOR, CERAMIC,10UF,+-20%,10V,X5R,1210,TAPE 1589417 1 5-23 57LFC/AN Service Manual Table 5-5. A6 Digital Synthesis PCA (cont) Ref Des 5-24 Description Part Number Qty C47-48 CAPACITOR, CERAMIC,560PF,+-5%,50V,C0G,0603,TAPE 1555376 2 C49 CAPACITOR, SMR,CAP,CER,0.47UF,+-10%,16V,X7R,0805 690545 1 C52-53 CAPACITOR, SMR,CAP,TA,4.7UF,+-10%,20V,3528 605433 2 C55-56 CAPACITOR, SMR,CAP,CER,1UF,+80-20%,25V,Y5V,1206 605303 2 C58 CAPACITOR, SMR,CAP,TA,33UF,+-20%,16V,6032 691151 1 C61 CAPACITOR, SMR,CAP,CER,56PF,+-5%,50V,C0G,0805 887901 1 C69 C71 C78 C80 CAPACITOR, SMR,CAP,TA,100UF,+-20%,16V,7343 803822 4 C85 CAPACITOR, ELECTROLYTIC,TANTALUM,150UF,+20%,20V,7260,TAPE 1279156 1 C131132 CAPACITOR, SMR,CAP,CER,10PF,+-10%,50V,C0G,1206 747311 2 C135 CAPACITOR, SMR,CAP,CER,0.033UF,+-10%,200V,X7R,1206 602547 1 CR1-10 CR12 CR14-15 CR21 DIODE,SI,PN,MMBD1503A,150V,200MA,DUAL,SERIES,LOW LEAKAGE,SOT-23,TAPE 928143 14 CR11 A52R,I-REG DIODE,2MA,10%,DO-7 686714 1 CR16 CR18 CR24-25 DIODE,GF1B, SMR,DIODE,SI,100V,1A,DO-214 912451 4 CR17 CR26 DIODE,SI,PN,DF01S,100V,1A,BRIDGE,4 PIN SURFACE MOUNT,3530,TAPE 912456 2 CR27-28 DIODE,MBRS140 SMR,DIODE,SI,SCHOTTKY,40V,1A,DO-214AB 605821 2 CR29-30 DIODE,SI,SCHOTTKY,BAT54S,30V,200MA,5NS,DUAL-SERIES,SOT23,TAPE 929745 2 E2 SURGE PROTECTOR,90V,+-20% 198507 1 H12-15 RIVET,AL,.089 DIA,.344 L,SEMI-TUBULAR,OVAL HEAD 838458 4 K1-2 K5 RELAY,ARMATURE,2 FORM C,5 VDC,LATCH K10 K12 K14 K2022 910773 9 K13 K17 715078 2 RELAY,ARMATURE,4 FORM C,5V,LATCH List of Replaceable Parts Parts Lists 5 Table 5-5. A6 Digital Synthesis PCA (cont) Ref Des Description Part Number Qty K18 RELAY,ARMATURE,2 FORM C,5VDC,LATCH 643178 1 K19 RELAY,ARMATURE,2 FORM A,5VDC,LATCH 642782 1 MP1 PCB, CURRENT 2048846 1 MP2 HEATSINK ASSEMBLY 2112487 1 MP3 HEATSINK ASSEMBLY 2112493 1 MP5-6 EJECTOR,PWB,NYLON 494724 2 MP13 HEAT SINK ASSEMBLY WITH MJE15029 XSTR 2062805 1 MP14 HEAT SINK ASSEMBLY WITH MJE15028 XSTR 2062797 1 P107 P207 CONNECTOR, DIN41612,TYPE C,RT ANG,64 PIN 807800 2 Q1 PNP,PWR,CENU56, TRANSISTOR,SI,PNP,80V,10W,TO-202 495689 1 742684 6 Q3-4 Q6 TRANSISTOR,SI,PNP,MMBT3906,40V,200MA,250MHZ,225MW,SOTQ12 Q14 23,TAPE Q19 Q5 Q7 Q9 Q11 Q15-16 Q20 NPN,MMBT3904 SMR,TRANSISTOR,SI,NPN,60V,350MW,SOT-23 742676 7 Q8 NPN,PWR,CENU06, TRANSISTOR,SI,NPN,80V,10W,TO-202 535468 1 Q41-42 FET,DMOS,N-CH R05A,TRANSISTOR,SI,N-DMOS FET,DEPL,TO-92 945050 2 R1 RESISTOR, METAL FOIL,0.1,+-0.1%,1W,10PPM,RADIAL,BULK 2061053 1 R2 R13 R124 R133134 R154 RESISTOR, SMR,RES,MF,10K,+-0.1%,.125W,25PPM,1206 106366 6 R3 R1718 R21 R29 R39 R43 R57 R70-71 R85-86 R140 R145 R147 R190 R209 RESISTOR, SMR,RES,CERM,1K,+-1%,.125W,100PPM,1206 783241 17 5-25 57LFC/AN Service Manual Table 5-5. A6 Digital Synthesis PCA (cont) Ref Des Description RESISTOR, CERMET,100,+-1%,0.125W,100PPM,1206,TAPE R4 R7 R16 R22 R30-31 R33 R4041 R46 R59-60 R72-73 R116 R205206 5-26 Part Number Qty 867494 17 R5 R12 R14 R25 R27 R45 R58 R66 R75-76 R83-84 R89-90 R106 RESISTOR, SMR,RES,CERM,2K,+-1%,.125W,100PPM,1206 807172 15 R6 R15 R64-65 RESISTOR, SMR,RES,CERM,13K,+-1%,0.1W,100PPM,0805 930164 4 R8 R108 RESISTOR, CERMET,200K,+-1%,0.125W,100PPM,1206,TAPE 783258 2 R9 R28 R156 RESISTOR, SMR,RES,CERM,2.2M,+-5%,.125W,200PPM,1206 811778 3 R10 R87 600202-536,RES RC1206 6.04K 1% 25PPM 1760171 2 R11 RESISTOR, SMR,RES,CERM,270,+-5%,.125W,200PPM,1206 746354 1 R19-20 R52 R155 RESISTOR, SMR,RES,MF,1K,+-0.1%,0.125W,10PPM,1206 929880 4 R23 R32 RESISTOR, SMR,RES,CERM,121,+-1%,.063W,100PPM,0603 689122 2 R24 R34 R61-62 RESISTOR, CERMET,0.060,+-5%,0.5W,100PPM,2010,TAPE 105999 4 List of Replaceable Parts Parts Lists 5 Table 5-5 A6 Digital Synthesis PCA (cont) Ref Des Description Part Number Qty R26 R54 R56 R69 R93 R102 R137 R143 R163166 R169172 R175176 R193 R197 R199 RESISTOR, SMR,RES,CERM,10K,+-1%,.125W,100PPM,1206 769794 21 R35-36 RESISTOR, SMR,RES,CERM,316,1%,.125W,100PPM,1206 604900 2 R37 R63 RESISTOR, SMR,RES,CERM,2.61K,+-1%,.125W,100PPM,1206 781179 2 R38 R42 R80 R95 RESISTOR, SMR,RES,CERM,698,+-1%,0.1W,100PPM,0805 641156 4 R44 R105 R148 RESISTOR, SMR,RES,CERM,511,+-1%,.125W,100PPM,1206 769869 3 R47-48 R74 R77 R198 RESISTOR, SMR,RES,CERM,110,+-1%,.125W,100PPM,1206 644473 5 R49 R53 RESISTOR, WIREWOUND,1.0,+-0.5%,1W,50PPM,2515,TAPE 1544336 2 R50-51 RESISTOR, SMR,RES,CERM,10,+-1%,.125W,100PPM,1206 867676 2 R55 R91- RESISTOR, SMR,RES,CERM,4.02K,+-1%,.125W,100PPM,1206 92 R101 R114 R118119 R211 783266 8 R67-68 RESISTOR, SMR,RES,CERM,1M,+-1%,.125W,100PPM,1206 836387 2 R78-79 RESISTOR, CERMET,47.5,+-1%,0.1W,100PPM,0805,TAPE 802006 2 R81-82 RESISTOR, SMR,RES,CERM,4.99K,+-1%,.125W,100PPM,1206 604345 2 R88 RESISTOR, SMR,RES,CERM,4.32K,+-1%,.063W,100PPM,0603 605250 1 5-27 57LFC/AN Service Manual Table 5-5. A6 Digital Synthesis PCA (cont) Ref Des 5-28 Description Part Number Qty R96-99 RESISTOR, SMR,RES,CERM,49.9K,+-1%,.125W,100PPM,1206 836379 4 R100 R103 RESISTOR, SMR,RES,CERM,4.99K,+-1%,0.1W,100PPM,0805 928767 2 R104 RESISTOR, SMR,RES,CERM,49.9,+-1%,0.1W,100PPM,0805 604923 1 R107 RESISTOR, SMR,RES,CERM,1M,+-5%,.063W,200PPM,0603 604998 1 R115 R117 R120121 RESISTOR, SMR,RES,CERM,10K,+-1%,0.1W,100PPM,0805 928791 4 R146 RESISTOR, SMR,RES,CERM,1.8K,+-5%,.125W,200PPM,1206 746453 1 R159 R173 RESISTOR, SMR,RES,CERM,6.98K,+-1%,.125W,100PPM,1206 929919 2 R186 RESISTOR, SMR,RES,CERM,301,+-1%,.125W,100PPM,1206 644598 1 R207208 RESISTOR, SMR,RES,CERM,49.9,+-1%,0.25W,100PPM,1210 929674 2 RT2 THERMISTOR, SMR,THERMISTOR,3,25,8055 642519 1 T1 POWER TRANSFORMER,16.5V-43.6VCT 627031 1 TP2-4 TP6-10 TP18-25 CONNECTOR,TERMINAL,TEST POINT,1510,TAPE 602125 16 U1 CMOS 74AC04 SMR,IC,CMOS,HEX INVERTER,SOIC 838417 1 U2 CMOS 74HC138 SMR,IC,CMOS,3-8 LINE DCDR W ENABLE,SOIC 783019 1 U3 U5 CMOS 74HC374 SMR,IC,CMOS,OCTAL D F/F,+EDG TRG,SOIC 866798 2 U4 U24 CMOS 74ACT175 SMR,IC,CMOS,QUAD D F/F,+EDG TRG,SOIC 944132 2 U6 U8-9 U11-12 U14 BIMOS 5800, SMR,IC,BIMOS,4 CHNL DRVR W/LTCH,SOIC 929781 6 U7 U13 U17 U29 U32 IC,OP AMP,AD744J,+-4.5 TO +-18V,2MV OFFSET,6MHZ,HI SLEW RATE,SO8,TAPE 929992 5 U10 U23 U25-26 U28 U47 IC,ANALOG SWITCH,DG444,+12 TO +-20V,85 OHMS,SPST,QUAD,NC,SO16,TAPE 875232 6 U16 BIFET LF412A ,IC,OP AMP,DUAL,LO OFFST VOLT,LO-DRIFT 851704 1 U18 BIPOLAR OP27G SMR,IC,OP AMP,ULOW NOISE,LOW VOS,SO8 687282 1 U19 BIFET TL062 SMR,IC,OP AMP,DUAL,JFET,LOW POWER,SOIC 806794 1 List of Replaceable Parts Parts Lists 5 Table 5-5. A6 Digital Synthesis PCA (cont) Ref Des Description Part Number Qty U20 BIPOLAR LM393 SMR,IC,COMPARATOR,DUAL,LOW PWR,SOIC 837211 1 U21 U44 U58-59 BIFET AD823 SMR,IC,OP AMP,DUAL,RAIL-RAIL,16 MHZ,SO8 642709 4 U27 IC,ANALOG SWITCH,ADG431,5-44V,24 OHMS,SPST,NO,SO16,TAPE 689844 1 U30 U34 U38 RELAY, SMR,RELAY,SOLID STATE,1FORM A,80VDC,120MA 687217 3 U31 U37 IC,OP AMP,LT1630,2.7V TO +-15V,525UV OFFSET,15MHZ,R-R,SS,DUAL,SO8,TAPE 2075118 2 U33 U48 U52-53 IC,OP AMP,LTC1150,+-16V,10UV OFFSET,2.5MHZ,ZERODRIFT,CHOPPER,DIP8,TUBE 2051666 4 U35 BIPOLAR OP284 SMR,IC,OPAMP,DUAL,PRECN,RAIL-RAIL I/O,SO8 642691 1 U45 ISOLATOR,OPTO SMR,ISOLATOR,OPTO,LED TO TRANSISTOR,SOIC 929281 1 U49 BIFET LF356N, IC,OP AMP,JFET INPUT,8 PIN DIP 472779 1 U50 IC,VOLTAGE REGULATOR,LINEAR,LM2990,-15V,1A,LDO,TO-220,TUBE 2111724 1 U51 BIPOLAR 2940, IC,VOLT REG,LDO,+15 V,1.0 A,TO-220 602748 1 VR1 VR5 ZENER,UNCOMP,MMBZ5237B,8.2V,5%,20MA,225MW,SOT-23,TAPE 837146 2 VR2 ZENER,UNCOMP,MMBZ5231B,5.1V,5%,20MA,225MW,SOT-23,TAPE 837179 1 VR3-4 ZENER 1N5908, ZENER,TRANS SUPPRESSOR,6V 508655 2 W1 W5-7 CONNECTOR,JUMPER,COPPER,TIN,1206,SURFACE MOUNT,T/R W14-15 W22 2061468 7 Z2 SUBSTRATE ASSY, 5500A-4R02T-H 945316 1 Z4 THIN FILM, HERM, RESISTANCE REF. 2094985 1 5-29 57LFC/AN Service Manual 57LFC-4006 apv055f.eps Figure 5-5. A6 Digital Synthesis PCA 5-30 List of Replaceable Parts Parts Lists 5 Table 5-6. A7 Current PCA Ref Des A7A101 Description Part Number ISOTHERMAL PCA Qty 1 C1 C3-6 CAPACITOR, SMR,CAP,CER,0.1UF,+-10%,50V,X7R,0805 C8-16 C18-23 C26-28 C42-43 C45-46 C50 C54 C60 C70 C72-77 C79 C81-84 C86-95 C97-101 C104105 C107109 C111116 C119126 C133134 690500 78 C2 C35 CAPACITOR, SMR,CAP,CER,10PF,+-5%,50V,C0G,0805 494781 2 C7 CAPACITOR, SMR,CAP,CER,4700PF,+-10%,50V,X7R,1206 832279 1 C17 CAPACITOR, SMR,CAP,CER,3.3PF,+-0.25PF,50V,C0G,0805 942560 1 C24 C41 CAPACITOR, SMR,CAP,CER,33PF,+-5%,50V,C0G,0805 603172 2 C25 C51 CAPACITOR, SMR,CAP,TA,10UF,+-20%,25V,6032 C57 C59 C62-68 C96 927814 12 C29 C3233 CAPACITOR, SMR,CAP,CER,2200PF,+-5%,50V,C0G,0805 942524 3 C3031 C3637 CAPACITOR, CERAMIC,100PF,+-5%,100V,C0G,0805,TAPE 601028 4 C34 CAPACITOR, SMR,CAP,CER,100PF,+-1%,100V,C0G,1206 644812 1 5-31 57LFC/AN Service Manual Table 5-6. A7 Current PCA (cont) Ref Des 5-32 Description Part Number Qty C38-39 CAPACITOR, SMR,CAP,CER,330PF,+-5%,50V,C0G,0805 512038 2 C40 C117 CAPACITOR, SMR,CAP,CER,1000PF,+-1%,50V,C0G,1206 867668 2 C44 CAPACITOR, CERAMIC,10UF,+-20%,10V,X5R,1210,TAPE 1589417 1 C47-48 CAPACITOR, CERAMIC,560PF,+-5%,50V,C0G,0603,TAPE 1555376 2 C49 CAPACITOR, SMR,CAP,CER,0.47UF,+-10%,16V,X7R,0805 690545 1 C52-53 CAPACITOR, SMR,CAP,TA,4.7UF,+-10%,20V,3528 605433 2 C55-56 CAPACITOR, SMR,CAP,CER,1UF,+80-20%,25V,Y5V,1206 605303 2 C58 CAPACITOR, SMR,CAP,TA,33UF,+-20%,16V,6032 691151 1 C61 CAPACITOR, SMR,CAP,CER,56PF,+-5%,50V,C0G,0805 887901 1 C69 C71 CAPACITOR, SMR,CAP,TA,100UF,+-20%,16V,7343 C78 C80 803822 4 C85 CAPACITOR, ELECTROLYTIC,TANTALUM,150UF,+-20%,20V,7260,TAPE 1279156 1 C102103 CAPACITOR, CAP,AL,470UF,+-20%,35V,SOLV PROOF 756700 2 C110 CAPACITOR, SMR,CAP,CER,3900PF,+-5%,25V,C0G,0805 690560 1 C129130 CAPACITOR, SMR,CAP,CER,0.047UF,+-20%,50V,X7R,1206 782615 2 C131132 CAPACITOR, SMR,CAP,CER,10PF,+-10%,50V,C0G,1206 747311 2 C135 CAPACITOR, SMR,CAP,CER,0.033UF,+-10%,200V,X7R,1206 602547 1 CR1-10 DIODE,SI,PN,MMBD1503A,150V,200MA,DUAL,SERIES,LOW LEAKAGE,SOT-23,TAPE CR12 CR1415 CR21 928143 14 CR11 DIODE,2MA,10%,DO-7 686714 1 CR16 CR18 CR2425 DIODE,SI,100V,1A,DO-214 912451 4 CR17 CR26 DIODE,SI,PN,DF01S,100V,1A,BRIDGE,4 PIN SURFACE MOUNT,3530,TAPE 912456 2 CR2728 DIODE,SI,SCHOTTKY,40V,1A,DO-214AB 605821 2 CR2930 DIODE,SI,SCHOTTKY,BAT54S,30V,200MA,5NS,DUAL-SERIES,SOT23,TAPE 929745 2 List of Replaceable Parts Parts Lists 5 Table 5-6. A7 Current PCA (cont) Ref Des Description Part Number Qty E2 SURGE PROTECTOR,90V,+-20% 198507 1 H12-15 RIVET,AL,.089 DIA,.344 L,SEMI-TUBULAR,OVAL HEAD 838458 4 K1-2 K5 RELAY,ARMATURE,2 FORM C,5 VDC,LATCH K10 K12 K14 K20-22 910773 9 K13 K17 RELAY,ARMATURE,4 FORM C,5V,LATCH 715078 2 K18 RELAY,ARMATURE,2 FORM C,5VDC,LATCH 643178 1 K19 RELAY,ARMATURE,2 FORM A,5VDC,LATCH 642782 1 MP1 PCB, CURRENT 2048846 1 MP2 HEATSINK ASSEMBLY 2112487 1 MP3 HEATSINK ASSEMBLY 2112493 1 MP5-6 EJECTOR,PWB,NYLON 494724 2 MP13 HEAT SINK ASSEMBLY WITH MJE15029 XSTR 2062805 1 MP14 HEAT SINK ASSEMBLY WITH MJE15028 XSTR 2062797 1 P107 P207 CONNECTOR, DIN41612,TYPE C,RT ANG,64 PIN 807800 2 Q1 TRANSISTOR,SI,PNP,80V,10W,TO-202 495689 1 742684 6 Q3-4 Q6 TRANSISTOR,SI,PNP,MMBT3906,40V,200MA,250MHZ,225MW,SOT23,TAPE Q12 Q14 Q19 Q5 Q7 Q9 Q11 Q15-16 Q20 TRANSISTOR,SI,NPN,60V,350MW,SOT-23 742676 7 Q8 TRANSISTOR,SI,NPN,80V,10W,TO-202 535468 1 Q41-42 TRANSISTOR,SI,N-DMOS FET,DEPL,TO-92 945050 2 R1 RESISTOR, METAL FOIL,0.1,+-0.1%,1W,10PPM,RADIAL,BULK 2061053 1 R2 R13 R124 R133134 R154 RESISTOR, SMR,RES,MF,10K,+-0.1%,.125W,25PPM,1206 106366 6 5-33 57LFC/AN Service Manual Table 5-6. A7 Current PCA (cont) 5-34 R3 R17- RESISTOR, SMR,RES,CERM,1K,+-1%,.125W,100PPM,1206 18 R21 R29 R39 R43 R57 R70-71 R85-86 R140 R145 R147 R190 R209 783241 17 RESISTOR,CERMET,100,+-1%,0.125W,100PPM,1206,TAPE R4 R7 R16 R22 R30-31 R33 R40-41 R46 R59-60 R72-73 R116 R205206 867494 17 R5 R12 RESISTOR, SMR,RES,CERM,2K,+-1%,.125W,100PPM,1206 R14 R25 R27 R45 R58 R66 R75-76 R83-84 R89-90 R106 807172 15 R6 R15 R64-65 930164 4 R8 R108 RESISTOR, CERMET,200K,+-1%,0.125W,100PPM,1206,TAPE 783258 2 R9 R28 R156 811778 3 R10 R87 RESISTOR, RC1206 6.04K 1% 25PPM 1760171 2 R11 746354 1 RESISTOR, SMR,RES,CERM,13K,+-1%,0.1W,100PPM,0805 RESISTOR, SMR,RES,CERM,2.2M,+-5%,.125W,200PPM,1206 RESISTOR, SMR,RES,CERM,270,+-5%,.125W,200PPM,1206 List of Replaceable Parts Parts Lists 5 Table 5-6. A7 Current PCA (cont) Ref Des Part Number Qty 929880 4 R23 R32 RESISTOR, SMR,RES,CERM,121,+-1%,.063W,100PPM,0603 689122 2 R24 R34 RESISTOR, CERMET,0.060,+-5%,0.5W,100PPM,2010,TAPE R61-62 105999 4 R26 R54 RESISTOR, SMR,RES,CERM,10K,+-1%,.125W,100PPM,1206 R56 R69 R93 R102 R137 R143 R163166 R169172 R175176 R193 R197 R199 769794 21 R19-20 R52 R155 Description RESISTOR, SMR,RES,MF,1K,+-0.1%,0.125W,10PPM,1206 R3536 RESISTOR, SMR,RES,CERM,316,1%,.125W,100PPM,1206 604900 2 R37 R63 RESISTOR, SMR,RES,CERM,2.61K,+-1%,.125W,100PPM,1206 781179 2 R38 R42 R80 R95 RESISTOR, SMR,RES,CERM,698,+-1%,0.1W,100PPM,0805 641156 4 R44 R105 R148 RESISTOR, SMR,RES,CERM,511,+-1%,.125W,100PPM,1206 769869 3 R4748 R74 R77 R198 RESISTOR, SMR,RES,CERM,110,+-1%,.125W,100PPM,1206 644473 5 R49 R53 RESISTOR, WIREWOUND,1.0,+-0.5%,1W,50PPM,2515,TAPE 1544336 2 R5051 RESISTOR, SMR,RES,CERM,10,+-1%,.125W,100PPM,1206 867676 2 5-35 57LFC/AN Service Manual Table 5-6. A7 Current PCA (cont) Ref Des Description Qty R55 R91-92 R101 R114 R118119 R211 RESISTOR, SMR,RES,CERM,4.02K,+-1%,.125W,100PPM,1206 783266 8 R67-68 RESISTOR, SMR,RES,CERM,1M,+-1%,.125W,100PPM,1206 836387 2 R78-79 RESISTOR, CERMET,47.5,+-1%,0.1W,100PPM,0805,TAPE 802006 2 R81-82 RESISTOR, SMR,RES,CERM,4.99K,+-1%,.125W,100PPM,1206 604345 2 R88 RESISTOR, SMR,RES,CERM,4.32K,+-1%,.063W,100PPM,0603 605250 1 R96-99 RESISTOR, SMR,RES,CERM,49.9K,+-1%,.125W,100PPM,1206 836379 4 R100 R103 RESISTOR, SMR,RES,CERM,4.99K,+-1%,0.1W,100PPM,0805 928767 2 R104 RESISTOR, SMR,RES,CERM,49.9,+-1%,0.1W,100PPM,0805 604923 1 R107 RESISTOR, SMR,RES,CERM,1M,+-5%,.063W,200PPM,0603 604998 1 R115 R117 R120121 RESISTOR, SMR,RES,CERM,10K,+-1%,0.1W,100PPM,0805 928791 4 R146 RESISTOR, SMR,RES,CERM,1.8K,+-5%,.125W,200PPM,1206 746453 1 R159 R173 RESISTOR, SMR,RES,CERM,6.98K,+-1%,.125W,100PPM,1206 929919 2 R186 RESISTOR, SMR,RES,CERM,301,+-1%,.125W,100PPM,1206 644598 1 R207208 RESISTOR, SMR,RES,CERM,49.9,+-1%,0.25W,100PPM,1210 929674 2 T1 POWER TRANSFORMER,16.5V-43.6VCT 627031 1 CONNECTOR,TERMINAL,TEST POINT,1510,TAPE TP2-4 TP6-10 TP18-25 602125 16 U1 SMR,IC,CMOS,HEX INVERTER,SOIC 838417 1 U2 SMR,IC,CMOS,3-8 LINE DCDR W ENABLE,SOIC 783019 1 U3 U5 CMOS 74HC374 SMR,IC,CMOS,OCTAL D F/F,+EDG TRG,SOIC 866798 2 U4 U24 SMR,IC,CMOS,QUAD D F/F,+EDG TRG,SOIC 944132 2 929781 6 U6 U8-9 IC,BIMOS,4 CHNL DRVR W/LTCH,SOIC U11-12 U14 5-36 Part Number List of Replaceable Parts Parts Lists 5 Table 5-6. A7 Current PCA (cont) Ref Des Part Number Qty U7 U13 IC,OP AMP,AD744J,+-4.5 TO +-18V,2MV OFFSET,6MHZ,HI SLEW U17 U29 RATE,SO8,TAPE U32 929992 5 U10 U23 IC,ANALOG SWITCH,DG444,+12 TO +-20V,85 U25-26 OHMS,SPST,QUAD,NC,SO16,TAPE U28 U47 875232 6 U16 BIFET LF412A, IC,OP AMP,DUAL,LO OFFST VOLT,LO-DRIFT 851704 1 U18 BIPOLAR OP27G, SMR,IC,OP AMP,ULOW NOISE,LOW VOS,SO8 687282 1 U19 SMR,IC,OP AMP,DUAL,JFET,LOW POWER,SOIC 806794 1 U20 BIPOLAR LM393, SMR,IC,COMPARATOR,DUAL,LOW PWR,SOIC 837211 1 U21 U44 BIFET AD823, SMR,IC,OP AMP,DUAL,RAIL-RAIL,16 MHZ,SO8 U58-59 642709 4 U27 689844 1 U30 U34 RELAY,SOLID STATE,1FORM A,80VDC,120MA U38 687217 3 U31 U37 IC,OP AMP,LT1630,2.7V TO +-15V,525UV OFFSET,15MHZ,R-R,SS,DUAL,SO8,TAPE 2075118 2 U33 U48 IC,OP AMP,LTC1150,+-16V,10UV OFFSET,2.5MHZ,ZEROU52-53 DRIFT,CHOPPER,DIP8,TUBE 2051666 4 U35 BIPOLAR OP284, SMR,IC,OPAMP,DUAL,PRECN,RAIL-RAIL I/O,SO8 642691 1 U45 ISOLATOR,OPTO,LED TO TRANSISTOR,SOIC 929281 1 U49 BIFET LF356N, IC,OP AMP,JFET INPUT,8 PIN DIP 472779 1 U50 IC,VOLTAGE REGULATOR,LINEAR,LM2990,-15V,1A,LDO,TO-220,TUBE 2111724 1 U51 BIPOLAR 2940, IC,VOLT REG,LDO,+15 V,1.0 A,TO-220 602748 1 VR1 VR5 ZENER,UNCOMP,MMBZ5237B,8.2V,5%,20MA,225MW,SOT-23,TAPE 837146 2 VR2 ZENER,UNCOMP,MMBZ5231B,5.1V,5%,20MA,225MW,SOT-23,TAPE 837179 1 VR3-4 ZENER,TRANS SUPPRESSOR,6V 508655 2 W1 W57 W1415 W22 CONNECTOR,JUMPER,COPPER,TIN,1206,SURFACE MOUNT,T/R 2061468 7 Z2 SUBSTRATE ASSEMBLY 945316 1 Z4 THIN FILM, HERM, RESISTANCE REF. 2094985 1 Description IC,ANALOG SWITCH,ADG431,5-44V,24 OHMS,SPST,NO,SO16,TAPE 5-37 57LFC/AN Service Manual 57LFC-4007 apv056f.eps Figure 5-6. A7 Current PCA 5-38 List of Replaceable Parts Parts Lists 5 Table 5-7. A8 High Voltage PCA Ref Des Description Part Number Qty A10 ISOTHERMAL PCA 1 C1 C2 C8 C34 CAPACITOR, SMR,CAP,CER,0.1UF,+-10%,100V,X7R,1206 804325 4 C3 C4 C5 C11 C26 C28 C30 C32 C36 C39 C40 C53 C54 C57 C58 C60 C62 C63 C64 C66 C67 C68 C70 C71 C72 C73 C74 C76 C83 C84 C85 C86 C87 C88 C89 C90 CAPACITOR, SMR,CAP,CER,0.1UF,+-10%,50V,X7R,0805 690500 36 5-39 57LFC/AN Service Manual Table 5-7. A8 High Voltage PCA (cont) Ref Des 5-40 Description Part Number Qty C6 C7 C10 C12 C13 C37 C38 C41 CAPACITOR, CAP,AL,3.3UF,+30-20%,450V 782524 8 C9 C35 CAPACITOR, CAP,AL,10UF,+-20%,160V,SOLV PROOF 817064 2 C14 C42 C61 CAPACITOR, SMR,CAP,CER,100PF,+-5%,50V,C0G,0805 514133 3 C15 C43 C65 C69 C91 C92 CAPACITOR, FILM,POLYESTER,1.0UF,+-10%,50V,7360,TAPE 2063474 6 C16 C44 CAPACITOR, SMR,CAP,TA,100UF,+-20%,10V,7343 929877 2 C17 C25 CAPACITOR, CAP,CER,0.02UF,+-20%,500V,Z5U 407403 2 C18 C24 C45 CAPACITOR, CERAMIC,22PF,+-5%,1000V,C0G,1808,TAPE 2062822 3 C19 C46 C47 C49 CAPACITOR, FILM,POLYPHENYLENE SULFIDE,0.22UF,+20%,50V,7360,TAPE 1546405 4 C20 C23 CAPACITOR, R05R,CAP,TA,15UF,+-20%,20V 807610 2 C21 C22 CAPACITOR, SMR,CAP,POLYES,0.47UF,+-10%,50V,7360 802519 2 C27 CAPACITOR, SMR,CAP,CER,10PF,+-5%,50V,C0G,0805 494781 1 C29 CAPACITOR, SMR,CAP,CER,470PF,+-1%,50V,C0G,0805 929476 1 C31 C33 C81 C82 CAPACITOR, SMR,CAP,CER,47PF,+-5%,50V,C0G,0805 494633 4 C48 CAPACITOR, CERAMIC,10PF,+-2%,1000V,C0G,1808,TAPE 1579905 1 List of Replaceable Parts Parts Lists 5 Table 5-7. A8 High Voltage PCA (cont) Ref Des Description Part Number Qty C50 CAPACITOR, SMR,CAP,TA,1UF,+-20%,35V,3528 866970 1 C51 CAPACITOR, SMR,CAP,CER,22PF,+-1%,50V,C0G,0805 867663 1 C52 CAPACITOR, SMR,CAP,CER,0.1UF,+-10%,50V,X7R,1206 605292 1 C55 C56 C59 C75 CAPACITOR, SMR,CAP,TA,10UF,+-20%,25V,6032 927814 4 C77 C78 C79 C80 CAPACITOR,CERAMIC,0.1UF,+-10%,25V,X7R,0805,TAPE 942529 4 CR1 CR2 CR4 CR5 CR16 CR17 CR22 CR23 CR25 CR27 CR29 CR30 CR36 CR37 CR39 CR47 CR49 CR50 CR51 CR52 CR53 CR58 CR59 CR60 CR61 DIODE,SI,PN,BAV99,70V,215MA,6NS,DUAL,SERIES,SOT-23,TAPE 742320 25 CR3 CR6 CR10 CR11 CR12 CR13 CR54 CR55 CR56 CR57 DIODE,SI,PN,S1G,400V,1A,1.8US,DO-214AC,TAPE 107573 10 5-41 57LFC/AN Service Manual Table 5-7. A8 High Voltage PCA (cont) Ref Des 5-42 Description Part Number Qty CR7 CR8 CR9 CR14 CR15 CR18 CR19 CR20 CR40 CR41 CR62 CR63 DIODE,SI,PN,GF1M,1000V,1A,SMB,TAPE 2060197 12 CR21 CR38 CR46 CURRENT REGULATOR DIODE,CCLM1000,1.1MA,20%,1.7100V,SOD80,TAPE 2043974 3 CR26 CR43 CR44 CR45 DIODE,MURS120 SMR,DIODE,SI,ULTRAFAST,200V,1A,SMB 944264 4 CR31 CR32 CR65 CR66 DIODE,SI,PN,BAV199,70V,215MA,3US,DUAL,SERIES,SOT-23,TAPE 605805 4 CR35 CR48 DIODE,MBRS140 SMR,DIODE,SI,SCHOTTKY,40V,1A,DO-214AB 605821 2 CR42 CURRENT REGULATOR DIODE,CCLM2000,2MA,16%,2.3100V,SOD80,TAPE 2119594 1 F1 F2 FUSE,8X8.5MM,0.2A,250V,SLOW,RADIAL 851949 2 K1 K2 K3 K4 RELAY,ARMATURE,2 FORM C,5VDC,LATCH 603001 4 L1 CHOKE,6TURN 320911 1 L2 INDUCTOR,1.5UH,+-5%,128MHZ,SHLD 413856 1 MP1 PCB, HIGH VOLTAGE 2048854 1 MP2 MP5 HEATSINK ASSEMBLY 2070059 2 MP3 MP14 HEATSINK ASSEMBLY 2070067 2 MP4 HEATSINK ASSEMBLY 2070032 1 List of Replaceable Parts Parts Lists 5 Table 5-7. A8 High Voltage PCA (cont) Ref Des Description Part Number Qty MP6 MP9 HEATSINK ASSEMBLY 2117189 2 MP7 MP11 HEATSINK ASSEMBLY 2117192 2 MP8 HEATSINK ASSEMBLY 2070044 1 MP10 HEATSINK ASSEMBLY 2070836 1 MP12 HEATSINK ASSEMBLY 665448 1 MP13 HEATSINK ASSEMBLY 2070849 1 MP15 MP16 EJECTOR,PWB,NYLON 494724 2 P18 P28 CONNECTOR,CONN,DIN41612,TYPE C,RT ANG,64 PIN 807800 2 Q03 Q09 Q19 Q26 Q31 Q47 Q49 Q59 NPN,MMBT3904 SMR,TRANSISTOR,SI,NPN,60V,350MW,SOT-23 742676 8 Q6 Q8 Q28 Q30 Q32 Q39 Q53 Q54 Q55 Q60 TRANSISTOR,SI,PNP,MMBT3906,40V,200MA,250MHZ,225MW,SOT23,TAPE 742684 10 Q10 Q11 Q35 Q56 TRANSISTOR,SI,PNP,150V,300MW,TO-92 266619 4 Q12 Q34 Q36 TRANSISTOR,SI,NPN,2N5551,180V,600MA,100MHZ,625MW,TO92,TAPE 1791849 3 Q13 Q14 Q61 Q62 TRANSISTOR,SI,PNP,MJD350,300V,500MA,1.56W,D-PAK,TAPE 2063630 4 5-43 57LFC/AN Service Manual Table 5-7. A8 High Voltage PCA (cont) Ref Des 5-44 Description Part Number Qty Q15 Q16 Q63 Q64 TRANSISTOR,SI,NPN,MJD340,300V,500MA,1.56W,D-PAK,TAPE 2063627 4 Q17 Q18 Q20 Q41 FET,DMOS,N-CH R05A,TRANSISTOR,SI,N-DMOS,500V,TO-92 782490 4 Q21 Q37 Q38 Q40 MOSFET,P-CHN R05A,TRANSISTOR,SI,P-MOS,500V,TO-92 782508 4 Q23 Q24 TRANSISTOR,SI,PNP,2N6520,350V,500MA,40MHZ,625MW,TO-92,TAPE 602961 2 Q43 Q58 TRANSISTOR,SI,NPN,350V,625MW,TO-92 853994 2 Q45 Q50 Q51 TRANSISTOR,SI,NPN,2N3904,60V,200MA,300MHZ,625MW,AMMO BOX,TO-92,TAPE 698225 3 Q46 TRANSISTOR,SI,PNP,12V,625MW,TO-92 831446 1 Q48 N-CHANNEL MOSFET ENHANCEMENT 1756473 1 Q66 MOSFET,SI,N,IRF820,500V,2.5A,3 OHMS,50W,TO-220,BULK 782540 1 Q67 FET,PWR,P,MTP2P50 ,TRANSISTOR,SI,P-MOS,POWER,500V,TO-220 782482 1 R1 R2 R102 R111 RESISTOR, SMR,RES,CERM,470,+-5%,.125W,200PPM,1206 740506 4 R3 R9 RESISTOR, SMR,RES,CERM,27,+-5%,.125W,200PPM,1206 807735 2 R4 R6 R8 R10 RESISTOR, CERMET,10,+-5%,0.25W,200PPM,1206,TAPE 2060987 4 R5 R7 RESISTOR, SMR,RES,CERM,22,+-5%,.125W,200PPM,1206 746230 2 List of Replaceable Parts Parts Lists 5 Table 5-7. A8 High Voltage PCA (cont) Ref Des Description Part Number Qty R11 R12 R49 R57 R129 R131 R133 R138 R144 R212 R234 RESISTOR, SMR,RES,CERM,1K,+-1%,0.1W,100PPM,0805 928713 11 R22 R23 R24 R25 R26 R27 R28 R29 R95 R96 R98 R99 R100 R101 R103 R104 R107 R108 R109 R110 R113 R114 R116 R117 RESISTOR, CERMET,68K,+-2%,0.75W,200PPM,2010,TAPE 2062916 24 5-45 57LFC/AN Service Manual Table 5-7. A8 High Voltage PCA (cont) Ref Des 5-46 Description Part Number Qty R30 R58 R134 R149 R159 R160 R164 R165 R171 R172 R203 R204 R205 R214 R244 R250 RESISTOR, SMR,RES,CERM,10K,+-1%,0.1W,100PPM,0805 928791 16 R36 R73 R74 R157 R216 R217 RESISTOR, CERMET,110,+-5%,0.75W,200PPM,2010,TAPE 2060968 6 R37 R39 R40 R85 R87 R89 R218 R220 R222 R229 R230 R231 RESISTOR, CERMET,150K,+-5%,0.25W,200PPM,1206,TAPE 2060922 12 List of Replaceable Parts Parts Lists 5 Table 5-7. A8 High Voltage PCA (cont) Ref Des Description Part Number Qty R38 R41 R42 R43 R76 R78 R81 R84 R219 R221 R223 R224 R225 R226 R227 R228 RESISTOR, CERMET,56K,+-5%,0.75W,200PPM,2010,TAPE 2060910 16 R44 R142 RESISTOR, SMR,RES,CERM,150,+-5%,.125W,200PPM,1206 746313 2 R45 R46 RESISTOR, CERMET,10K,+-5%,0.25W,200PPM,1210,TAPE 1597827 2 R48 R50 R51 R52 R53 R54 R55 R56 RESISTOR, CERMET,120K,+-1%,0.25W,100PPM,1206,TAPE 2062893 8 R61 R62 R63 R64 R150 R151 R152 R153 RESISTOR, CERMET,280K,+-5%,0.25W,200PPM,1206,TAPE 2060979 8 R65 R66 R67 R70 R71 R72 RESISTOR, CERMET,10,+-10%,1W,200PPM,2512,TAPE 2113674 6 R68 R156 R158 RESISTOR, CERMET,33.2K,+-1%,0.1W,100PPM,0805,TAPE 943345 3 5-47 57LFC/AN Service Manual Table 5-7. A8 High Voltage PCA (cont) Ref Des 5-48 Description Part Number Qty R69 R155 RESISTOR, METAL FILM,48.7K,+-0.1%,0.1W,25PPM,0805,TAPE 1544262 2 R75 R136 R137 R140 R154 R162 R207 RESISTOR, SMR,RES,CERM,100K,+-1%,0.1W,100PPM,0805 928866 7 R77 R163 RESISTOR, CERMET,3.16K,+-1%,0.1W,100PPM,0805,TAPE 943019 2 R79 R80 R82 R166 R167 R170 RESISTOR, CERMET,330K,+-5%,0.25W,200PPM,1206,TAPE 2060931 6 R83 R86 R173 R178 RESISTOR, CERMET,9.1K,+-5%,0.1W,200PPM,0805,TAPE 2060946 4 R88 R179 RESISTOR, CERMET,8.2,+-1%,0.25W,100PPM,1206,TAPE 2123526 2 R90 R232 RESISTOR, CERMET,3.3,+-1%,0.25W,100PPM,1206,TAPE 2113688 2 R91 R92 R93 R180 R181 R182 RESISTOR, CERMET,27K,+-5%,0.125W,200PPM,1206,TAPE 740530 6 R94 R97 R112 R115 RESISTOR, CERMET,18.2,+-1%,1W,100PPM,2512,TAPE 2052279 4 R118 R190 R191 RESISTOR, SMR,RES,CERM,47,+-5%,.125W,200PPM,1206 746263 3 R119 R120 R121 R122 RESISTOR, CERMET,15K,+-5%,0.75W,200PPM,2010,TAPE 2090984 4 R123 RESISTOR, SMR,RES,CERM,2.2K,+-5%,.125W,200PPM,1206 746479 1 List of Replaceable Parts Parts Lists 5 Table 5-7. A8 High Voltage PCA (cont) Ref Des Description Part Number Qty R124 RESISTOR, CERMET,3.92K,+-1%,0.125W,100PPM,0805,TAPE 1591284 1 R125 R127 RESISTOR, BULK METAL FOIL,100K,+0.1%,0.6W,0.6PPM,RADIAL,BULK 2114847 2 R126 R198 RESISTOR, CERMET,220,+-1%,0.25W,100PPM,1206,TAPE 2063572 2 R128 RESISTOR, SMR,RES,CERM,30.9K,+-1%,0.1W,100PPM,0805 928838 1 R130 R215 R233 R243 R249 RESISTOR, CERMET,4.75K,+-1%,0.1W,100PPM,0805,TAPE 2063107 5 R132 R139 R213 RESISTOR, CERMET,2K,+-1%,0.1W,100PPM,0805,TAPE 928742 3 R135 R147 R206 RESISTOR, CERMET,237,+-1%,0.1W,100PPM,0805,TAPE 801990 3 R141 RESISTOR, SMR,RES,CERM,13.3K,+-1%,0.1W,100PPM,0805 928809 1 R143 RESISTOR, SMR,RES,CERM,10,+-5%,1W,200PPM,2512 886705 1 R145 R146 RESISTOR, BULK METAL FOIL,10K,+-0.1%,0.6W,0.6PPM,RADIAL,BULK 2114858 2 R148 RESISTOR, SMR,RES,MF,1K,+-0.1%,0.1W,50PPM,0805 802469 1 R161 RESISTOR, SMR,RES,CERM,301K,+-1%,0.1W,100PPM,0805 602711 1 R168 R169 RESISTOR, SMR,RES,CERM,200K,+-1%,0.1W,100PPM,0805 928882 2 R174 R175 R176 R177 RESISTOR, SMR,RES,CERM,15K,+-1%,.125W,100PPM,1206 769810 4 R183 R185 RESISTOR, SMR,RES,CERM,100,+-1%,1W,100PPM,2512 691394 2 R184 RESISTOR, SMR,RES,CERM,332,+-1%,.125W,100PPM,1206 644614 1 R186 R187 R188 R189 RESISTOR, CERMET,100,+-1%,0.25W,100PPM,1206,TAPE 2090991 4 R192 RESISTOR, SMR,RES,CERM,1.5K,+-1%,.125W,100PPM,1206 810630 1 R193 RESISTOR, SMR,RES,CERM,432,+-1%,.125W,100PPM,1206 811885 1 5-49 57LFC/AN Service Manual Table 5-7 A8 High Voltage PCA (cont) Ref Des 5-50 Description Part Number Qty R194 RESISTOR, SMR,RES,CERM,86.6,+-1%,0.1W,100PPM,0805 106929 1 R195 RESISTOR, CERMET,3.57K,+-1%,0.1W,100PPM,0805,TAPE 943022 1 R196 RESISTOR, CERMET,750,+-1%,0.1W,100PPM,0805,TAPE 1292158 1 R197 RESISTOR, VARIABLE,CERMET,2K,+-20%,0.25W,SINGLE TURN,TOP ADJ,4MM,TAPE 1292409 1 R199 R201 R210 RESISTOR, SMR,RES,CERM,2.43K,+-1%,0.1W,100PPM,0805 928754 3 R200 RESISTOR, SMR,RES,CERM,27.4K,+-1%,0.1W,100PPM,0805 930185 1 R202 RESISTOR, SMR,RES,CERM,18.2K,+-1%,0.1W,100PPM,0805 930177 1 R208 RESISTOR, SMR,RES,CERM,1.5K,+-1%,0.1W,100PPM,0805 688884 1 R211 R264 R265 RESISTOR, SMR,RES,CERM,3.32K,+-1%,0.1W,100PPM,0805 930099 3 R235 R236 RESISTOR, CERMET,24.3K,+-1%,0.1W,100PPM,0805,TAPE 943071 2 R240 R241 R246 R247 RESISTOR, SMR,RES,MF,10K,+-0.1%,0.1W,25PPM,0805 650389 4 R242 R248 R252 R253 R254 R255 RESISTOR, SMR,RES,CERM,249K,+-1%,.125W,100PPM,1206 821306 6 R245 R251 RESISTOR, SMR,RES,CERM,2K,+-1%,.125W,100PPM,1206 807172 2 R256 R257 R258 R259 RESISTOR, CERMET,2.21K,+-1%,0.1W,100PPM,0805,TAPE 928747 4 R260 R261 RESISTOR, CERMET,5.6,+-1%,0.25W,100PPM,1206,TAPE 2113695 2 R277 R278 RESISTOR, CERMET,10M,+-1%,0.1W,400PPM,0805,TAPE 943659 2 RT001 RT002 THERMISTOR,DISC,POS,47,+-20%,25C 604139 2 S1 WIRE,JUMPER,TEF,22AWG,WHT,.200 529776 2 List of Replaceable Parts Parts Lists 5 Table 5-7. A8 High Voltage PCA (cont) Ref Des Description Part Number Qty TP1 TP2 TP3 TP4 TP5 TP6 TP7 TP8 TP9 TP10 TP11 TP12 TP13 TP14 TP15 TP16 TP17 TP18 CONNECTOR, TERMINAL,TEST POINT,1510,TAPE 602125 18 U1 U2 BIFET LF353, SMR,IC,OP AMP,DUAL,JFET INPUT,SO8 688579 2 U3 U5 IC,OP AMP,OPA637,+-4.5V TO +-18V,250UV OFFSET,80MHZ,HISPEED,DIFET,SO8,TAPE 2091008 2 U4 U11 CMOS LTC1150, SMR,IC,OP AMP,CHOPPER,+/-15V,INT CAPS,SO8 107565 2 U6 CMOS 74HCU04, SMR,IC,CMOS,HEX INVERTER,UNBUFFERED,SOIC 806893 1 U7 CMOS 74HC138, SMR,IC,CMOS,3-8 LINE DCDR W ENABLE,SOIC 783019 1 U8 BIPOLAR 339, SMR,IC,COMPARATOR,QUAD,14 PIN,SOIC 741561 1 U9 BIPOLAR LM393, SMR,IC,COMPARATOR,DUAL,LOW PWR,SOIC 837211 1 U10 U20 IC,ANALOG SWITCH,DG413,3-44V,35 OHMS,SPST,QUAD,2NC,2NO,SO16,TAPE 1563433 2 U12 U13 BIMOS 5800, SMR,IC,BIMOS,4 CHNL DRVR W/LTCH,SOIC 929781 2 U14 U17 CMOS 74HC374 SMR,IC,CMOS,OCTAL D F/F,+EDG TRG,SOIC 866798 2 U15 U16 IC,OP AMP,OP196,3-12V,300UV OFFSET,350KHZ,R/R,S/S,SO8,TAPE 2101052 2 U19 IC,ANALOG SWITCH,DG408,+-15V,100 OHMS,8-1 MULTIPLEXER,SO16,TAPE 2101034 1 U21 U24 IC,OP AMP,AD744J,+-4.5 TO +-18V,2MV OFFSET,6MHZ,HI SLEW RATE,SO8,TAPE 929992 2 5-51 57LFC/AN Service Manual Table 5-7. A8 High Voltage PCA (cont) Ref Des 5-52 Description Part Number Qty U22 U23 IC,VOLTAGE REFERENCE,ZRB500,5V,1%,50PPM/C,150UA,SOT23,TAPE 2101029 2 VR1 VR2 VR4 VR11 VR12 VR14 VR17 VR20 VR21 VR33 VR34 VR35 VR38 VR39 VR40 VR46 VR49 VR51 ZENER,UNCOMP,MMSZ5240B,10V,5%,20MA,500MW,SOD-123,TAPE 2060235 18 VR3 VR5 VR6 VR7 VR13 VR28 VR29 VR44 VR45 VR47 ZENER,UNCOMP,BZG03-C150,150V,8%,5MA,1.25W,SOD106,TAPE 2060212 10 VR8 VR26 VR27 VR30 ZENER,UNCOMP,MMBZ5237B,8.2V,5%,20MA,225MW,SOT-23,TAPE 837146 4 VR9 VR10 VR31 VR32 ZENER,UNCOMP,BZG03-C200,200V,6%,5MA,1.25W,SOD106,TAPE 2113707 4 VR15 VR16 VR18 ZENER,UNCOMP,MMSZ5245B,15V,5%,8.5MA,500MW,SOD-123,TAPE 2062810 3 VR19 ZENER,UNCOMP,MMSZ5226B,3.3V,5%,20MA,500MW,SOD-123,TAPE 641925 1 List of Replaceable Parts Parts Lists 5 Table 5-7. A8 High Voltage PCA (cont) Ref Des Description Part Number Qty VR22 VR23 VR24 VR25 VR41 VR42 VR43 VR48 VR50 ZENER,UNCOMP,MMBZ5231B,5.1V,5%,20MA,225MW,SOT-23,TAPE 837179 9 VR36 VR37 ZENER,UNCOMP,MMSZ5263B,56V,5%,2.2MA,500MW,SOD-123,TAPE 2060247 2 VR54 VR55 ZENER,UNCOMP,MMBZ5240B,10V,5%,20MA,225MW,SOT-23,TAPE 783704 2 VR56 VR59 ZENER 1N6456A A52R,ZENER,TRANS SUPPRESSOR,400V,5% 845003 2 VR57 VR58 ZENER,UNCOMP,1.5SMC47A,47V,5%,1MA,4W,TRANSIENT SUPRESSOR,SMC,TAPE 2086534 2 5-53 57LFC/AN Service Manual 57LFC-4008 apv057f.eps Figure 5-7. A8 High Voltage PCA 5-54 List of Replaceable Parts Parts Lists 5 Table 5-8. A9 Out-Guard CPU PCA Ref Des Description Part Number Qty BT1 BATTERY,PRIMARY,LITHIUM-MNO2,3.0V,0.560AH,CR2450,COIN,PC PINS,24X5MM,BULK 821439 1 C1-2 CAPACITOR, SMR,CAP,CER,22PF,+-10%,50V,C0G,1206 740563 2 C3-4 CAPACITOR, SMR,CAP,CER,22PF,+-10%,50V,C0G,1206 740563 2 C5 C7-8 C1112 C1516 C1821 C2526 C3132 C3638 C4244 C4749 C53 CAPACITOR, SMR,CAP,CER,0.01UF,+-10%,50V,X7R,0603 644838 25 C6 C23 C30 C39 C46 C55 C64 C66 CAPACITOR, SMR,CAP,CER,0.1UF,+-10%,25V,X7R,1206 747287 8 C9 CAPACITOR, SMR,CAP,CER,100PF,+-10%,50V,C0G,1206 740571 1 C13 CAPACITOR, SMR,CAP,TA,47UF,+-20%,16V,7343 644994 1 C17 CAPACITOR, SMR,CAP,CER,1000PF,+-10%,50V,X7R,0805 484378 1 C24 C2829 CAPACITOR, SMR,CAP,CER,0.01UF,+-10%,50V,X7R,0603 644838 3 5-55 57LFC/AN Service Manual Table 5-8. A9 Out-Guard PCA (cont) Ref Des 5-56 Description Part Number Qty C27 C45 C5052 C54 C67 CAPACITOR, SMR,CAP,TA,10UF,+-20%,25V,6032 927814 7 C3335 CAPACITOR, SMR,CAP,CER,100PF,+-10%,500V,C0G,1206 691508 3 C4041 C7273 CAPACITOR, SMR,CAP,CER,0.1UF,+-10%,25V,X7R,1206 747287 4 C5663 CAPACITOR, SMR,CAP,CER,100PF,+-10%,500V,C0G,1206 691508 8 C65 C6870 CAPACITOR, SMR,CAP,TA,10UF,+-20%,25V,6032 927814 4 C71 CAPACITOR, SMR,CAP,CER,330PF,+-5%,50V,C0G,0805 512038 1 H1-2 SCREW,6-32,.250,PAN,PHILLIPS,STEEL,ZINC-CLEAR,LOCK 152140 2 J1 CABLE,2MM,FLAT,20PIN 626066 1 J2 CONNECTOR, CONN,D-SUB,PWB,9 PIN 944256 1 J4 CONNECTOR, CONN,MICRO-RIBBON,REC,PWB,24 POS 851675 1 L1-8 INDUCTOR,BEAD,70 OHMS@100MHZ,200MADC,500MOHM,1206,TAPE 944558 8 L9-24 INDUCTOR,BEAD,70 OHMS@100MHZ,200MADC,500MOHM,1206,TAPE 944558 16 MP1-2 STANDOFF,ROUND,6-32,.220 HEIGHT,.250 OD,BRASS,SWAGE,.062 PANEL THK 261727 2 MP3-5 SPACER,SWAGE,.250 RND,BR,6-32,.250 446351 3 MP6 RUBBER,PAD,PORON,.75,.75,.125,SSA 690495 1 P3 CONNECTOR, D-SUB,PWB,9 SCKT 942581 1 R1 RESISTOR, SMR,RES,MF,10K,+-0.1%,.125W,25PPM,1206 106366 1 List of Replaceable Parts Parts Lists 5 Table 5-8. A9 Out-Guard PCA (cont) Ref Des Description Part Number Qty R2 R4 R5657 RESISTOR, SMR,RES,CERM,2K,+-5%,.125W,200PPM,1206 746461 4 R3 R55 R58 RESISTOR, SMR,RES,CERM,2K,+-5%,.125W,200PPM,1206 746461 3 R5 RESISTOR, CERMET,JUMPER,0,+0.05 MAX,0.063W,0603,TAPE 604394 1 R6 R13 RESISTOR, SMR,RES,CERM,51.1,+-1%,.125W,100PPM,1206 806422 2 R7 R11 RESISTOR, SMR,RES,CERM,499,+-1%,.125W,100PPM,1206 867833 2 R8-9 R19 R34 R37 R54 R5960 RESISTOR,SMR,RES,CERM,3K,+-5%,.125W,200PPM,1206 746511 8 R1415 RESISTOR, SMR,RES,CERM,27,+-5%,.125W,200PPM,1206 807735 2 R17 RESISTOR, SMR,RES,CERM,1K,+-5%,.125W,200PPM,1206 745992 1 R18 RESISTOR, SMR,RES,CERM,390,+-5%,.125W,200PPM,1206 740498 1 R20 RESISTOR, SMR,RES,CERM,3.6K,+-5%,.125W,200PPM,1206 746537 1 R21 RESISTOR, SMR,RES,CERM,10.7K,+-1%,0.1W,100PPM,0805 930037 1 R22 RESISTOR, SMR,RES,CERM,1K,+-5%,.125W,200PPM,1206 745992 1 S2 SWITCH,SLIDE,SPDT,LOW PROFILE 911250 1 U1 SMR,IC,CMOS,MICROPROCESSOR SUPERVISOR,SO8 929224 1 U2 SMR,IC,TTL,DUAL RS422 DRVR/RCV W/3ST,SOIC 913827 1 U3 REAL TIME CLOCK MODULE,RTC64613A,PARALLEL I/O,W/CRYSTAL,SO24,TAPE 914036 1 U4 IC,VOLTAGE REGULATOR,LINEAR,LP2980,5V,50MA,LDO,LO PWR,W/SHUT DOWN,SOT-23-5,TAPE 944996 1 U5 IC,MEMORY,FLASH,28F004,4MB,512KX8,5V,80NS,BOTTOM BOOT,PROGRAMMED,U5,TSOP40,TRAY 689232 1 5-57 57LFC/AN Service Manual Table 5-8. A9 Out-Guard PCA (cont) Ref Des 5-58 Description Part Number Qty U6 IC,MEMORY,FLASH,28F004,4MB,512KX8,5V,80NS,BOTTOM BOOT,PROGRAMMED,U6,TSOP40,TRAY 689239 1 U7 IC, LOGIC, 7SZ04, 1.8V-5.5V, INVERTER, SC70-5, TAPE 1541155 1 U8 CMOS 7SZ125 SMR,IC,CMOS,SINGLE BUFFER W/3-ST,SOT-23-5 690765 1 U9 CMOS 7SZ126 SMR,IC,CMOS,SINGLE BUFFER W/3-ST,SOT-23-5 689304 1 U10 IC,MICROPROCESSOR,68306,16 BIT,5V,16MHZ,INTEGRATED,PQFP132,TRAY 929083 1 U11 IC, LOGIC, 7SZ04, 1.8V-5.5V, INVERTER, SC70-5, TAPE 1541155 1 U14 CMOS 68C681 SM,IC,CMOS,DUAL CHANNEL UART,PLCC 866785 1 U1920 IC,INTERFACE,LT1781,DUAL RS-232 LINE DRIVER/RECEIVER,+15KV ESD,SOICW16,TAPE 2101104 2 U21 SMR,IC,NMOS,GPIB CONTROLLER,PLCC 887190 1 U24 SMR,IC,LSTTL,OCTAL GPIB XCVR,SOIC 831651 1 U25 SMR,IC,LSTTL,OCTAL GPIB XCVR,SOIC 831669 1 U3235 IC,MEMORY,SRAM,K6T1008,1MB,128KX8,5V,100NS,SO32,TAPE 914101 4 Y1 CRYSTAL,12.288MHZ,50/100PPM,20PF,PLASTIC ENCAPSULATED,SMD,TAPE 913942 1 Y2 CRYSTAL,3.6864MHZ,100/100PPM,20PF,PLASTIC ENCAPSULATED,SMD,TAPE 929240 1 Z1-2 RESISTOR, SMR,RES,CERM,ARRAY,4 PIN,2 RES,1K,+-5% 644861 2 List of Replaceable Parts Parts Lists 5 57LFC-7609 (1 of 1) apv058f.eps Figure 5-8. A9 Out-Guard PCA 5-59 Chapter 6 Schematic Diagrams Figure 6-1. 6-2. 6-3. 6-4. 6-5. 6-6. 6-7. Title Page A1 LED PCA............................................................................................................ A3 Motherboard PCA .............................................................................................. A5 Ohms PCA.......................................................................................................... A6 Digital Synthesis PCA........................................................................................ A7 Current PCA ....................................................................................................... A8 High Voltage PCA.............................................................................................. A9 Out-Guard CPU PCA ......................................................................................... 6-3 6-5 6-11 6-17 6-26 6-32 6-37 6-1 57LFC/AN Service Manual 6-2 Schematic Diagrams 6 57LFC-7601 (1 of 1) Figure 6-1. A1 LED PCA 6-3 57LFC Service Manual +5 V WP1 RED WP2 WP3 WP4 WARNING* OPERATE* DS1 RA-LED GREEN YELLOW DS3 HMPL-1503 STANDBY* DS2 HLMP-1401 57LFC-1001 6-4 Figure 6-1. A1 LED PCA (cont) Schematic Diagrams 6 57LFC-7603 Figure 6-2. A3 Motherboard PCA 6-5 57LFC Service Manual 8 NOTES: 6 7 5 UNLESS OTHERWISE SPECIFIED REFERENCE DESIGNATON LAST NOT USED USED C130 C7,9,13,16 CR92 CR30,32 E16 E9 F6 J208 J2-5,7-104,109-202 J204 K11 L10 M6 P201 P9-200 Q19 Q9-11,14-16 R125 R3,4,10,37-39 RT12 RV5 TP49 U34 U1 VR17 1. ALL RESISTORS ARE IN OHMS, ALL CAPACITORS ARE IN FARADS. A8_VOLTAGE D OGUA3 DCOM IG_DATA0 IG_DATA2 IG_DATA4 IG_DATA6 DCOM IG_ADDR0 IG_ADDR2 DCOM IG_CS0 DCOM IG_RD* DCOM 50MIL RLY_RST* 20MIL CLR_DRVR DCOM +5V +5V DCOM DCOM +5RLH DCOM OGUA2 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 A24 A25 A26 A27 A28 A29 A30 A31 A32 A7_CURRENT E7 J208 NC C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 A6_DDS J207 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 A24 A25 A26 A27 A28 A29 A30 A31 A32 OGUA3 5AC1 DCOM IG_DATA1 IG_DATA3 IG_DATA5 IG_DATA7 DCOM IG_ADDR1 IG_ADDR3 DCOM SPARE1 DCOM IG_DATA0 IG_DATA2 IG_DATA4 IG_DATA6 DCOM IG_ADDR0 IG_ADDR2 DCOM DCOM IG_WR* DCOM FAULT* IG_INT* DCOM DCOM -5V DCOM DCOM +5RLH DCOM DCOM IG_RD* SPARE4 DCOM RLY_RST* CLR_DRVR DCOM +5V +5V DCOM DCOM +5RLH DCOM OGUA2 A5_OHMS J206 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 OGUA3 5AC2 SPARE2 DCOM IG_DATA0 IG_DATA2 IG_DATA4 IG_DATA6 IG_DATA1 IG_DATA3 IG_DATA5 IG_DATA7 DCOM IG_ADDR0 IG_ADDR2 IG_ADDR1 IG_ADDR3 DCOM IG_CS0 IG_CS2 IG_CS4 IG_CS6 IG_CS3 DCOM IG_RD* SPARE4 IG_WR* SPARE0 DCOM RLY_RST* CLR_DRVR FAULT* IG_INT* DCOM +5V +5V DCOM -5V J205 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 A24 A25 A26 A27 A28 A29 A30 A31 A32 CLIN_A CLIN_B CLOUT_A CLOUT_B FIG_A DCOM DCOM +5RLH DCOM OGUA2 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 SER_CLK_A SER_CLK_B TIG_A TIG_B FIG_B A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 A24 A25 A26 A27 A28 A29 A30 A31 A32 5AC1 SPARE1 DCOM IG_DATA1 IG_DATA3 IG_DATA5 IG_DATA7 IG_DATA0 IG_DATA2 IG_DATA4 IG_DATA6 DCOM IG_ADDR1 IG_ADDR3 IG_ADDR0 IG_ADDR2 DCOM IG_CS1 IG_CS3 IG_CS5 IG_CS7 IG_CS4 IG_CS6 DCOM IG_WR* SPARE0 IG_RD* SPARE4 DCOM FAULT* IG_INT* RLY_RST* CLR_DRVR DCOM +5V +5V DCOM -5V DCOM DCOM +5RLH DCOM OGUA2 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 1 3 4 5AC2 SPARE2 DCOM IG_DATA1 IG_DATA3 IG_DATA5 IG_DATA7 DCOM IG_ADDR1 IG_ADDR3 DCOM IG_CS5 DCOM IG_WR* SPARE0 DCOM FAULT* IG_INT* DCOM DCOM -5V DCOM DCOM +5RLH DCOM OGUA2 D E5 NC ISHLD J108 C +360UNR +180UNR +45V SCOM -45V -180UNR -360UNR SCOM +15V SCOM -15V SCOM V3_3 SCOM RCOM1 SCOM VMID SCOM SLOT OUT_220V J107 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 A24 A25 A26 A27 A28 A29 A30 A31 A32 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 +360UNR +180UNR +45V SCOM -45V -180UNR -360UNR +MMONGO MMCOM -MMONGO +IREF +15I ICOM -15I ISHLD SCOM +15V SCOM -15V SCOM V3_3 SCOM I_PHASE IFBCK RCOM1 PMUX SCOM SCOM +15V SCOM -15V SCOM V3_3 SCOM RCOM2 SMUX SCOM VMID SCOM SCOM OUT_LO SCOM HIGUARD SLOT SLOT OUT_220V OUT_HI J106 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 A24 A25 A26 A27 A28 A29 A30 A31 A32 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 J105 A1 A2 A3 A4 A5 A6 A7 A8 SCOM A9 A10 A11 SCOM A12 V3_3 A13 SCOM A14 TC_LO A15 TC_COMP TC_ISO_MEAS A16 A17 SCOM A18 I_PHASE A19 IFBCK A20 RCOM1 A21 PMUX SCOM A22 A23 VMID SCOM A24 A25 A6_RET_LO A26 A6_SNS_LO A27 A28 A29 A30 SLOT A31 A32 VDIV C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 OGUA1 +15V SCOM -15V SHORT* +MMONGO MMCOM -MMONGO -IREF +15I ICOM -15I ISHLD SCOM +15V SCOM -15V SCOM V3_3 SCOM I_ACDC RCOM2 SMUX SCOM SCOM OUT_LO SCOM HIGUARD SLOT OUT_HI OGUA1 +15V +15V SCOM -15V -15V OTD* SRC* SCOM +45V SCOM -45V SCOM V3_3 SCOM TC_MEAS TC_ISO_SRC TC_SRC SCOM IFBCK RCOM1 PMUX I_ACDC RCOM2 SMUX SCOM SCOM VMID SCOM A6_RET_LO A6_SNS_LO SCOM OUT_LO IN_SNS_LO SCOM HIGUARD SLOT SLOT VDIV OUT_HI IN_SNS_HI A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 A18 A19 A20 A21 A22 A23 A24 A25 A26 A27 A28 A29 A30 A31 A32 C1 C2 C3 C4 C5 C6 C7 C8 C9 C10 C11 C12 C13 C14 C15 C16 C17 C18 C19 C20 C21 C22 C23 C24 C25 C26 C27 C28 C29 C30 C31 C32 OGUA1 +15V SCOM -15V C SCOM +45V SCOM -45V SCOM V3_3 SCOM C123-130 NOT INSTALLED SCOM P201 IS A 3-PIN HEADER FOR PINS 1 TO 3 AND A 5-PIN HEADER FOR PINS 5 TO 9 I_ACDC RCOM2 SMUX SCOM EARTH E16 C123 22P SCOM OUT_LO IN_SNS_LO SCOM HIGUARD P201 OUT_HI 3 SLOT K8 2 2 3 3 C125 10P C126 10P C127 20MIL 10P 4 1000V 1000V 1000V 1808 1808 1808 DS2E1 1 GUARD 6 2 7 3 8 4 SNS_LO 9 5 C130 20MIL 10P 10 OSNS_LO OUT_HI V3BUF TO VMID 13 DS2E1 CR16 BI V3BUF 8 K6 6 DS2E1 K6 9 9 S 13 DS2E1 11 GF1G 8 6 Z 220V TO VMID K11 K11 9 K10 K10 4 13 DS2E1 R18 11 9 VDIV VMID 11 K4 DS2E1 E6 BI E10 E11 E8 A6_RET_LO GUARD E14 K2 14 DS4E K2 3 DS4E 7 C128 10P SNS_HI RST 5 OSNS_HI 20MIL CR1 FDH300A K4 E1 9 IN_SNS_LO RST 11 K2 13 DS4E K2 4 DS4E 8 SNS_LO 6 OSNS_LO CR55 CR56 GF1G GF1G GF1G 1 RV2 22V 20% 1MA 2 OVER22V RV1 22V 20% 1MA 2 E15 R120 R121 R86 1 R123 1 R122 1 1 1 CR57 K5 8 6 E3 OUT_HI DS2E1 E4 GF1G 3A8 BI 6 GF1G 1 RV3 22V 20% 1MA 2 11 S 8 6 NOT INSTALLED J203 1 2 3 4 SRC* 5 TC_ISO_MEAS 6 OTD* 7 SCOM 8 9 SHORT* 10 11 12 TC_ISO_SRC 13 14 15 16 TC_SRC 17 +5V 18 TC_MEAS 19 20 OUT_LO K9 DS2E1 SNS_LO TO A6 K1 8 A6_SNS_LO 1206 57LFC-1003 (1 of 5) 4 DS2E1 9 6 IN_SNS_LO K1 13 11 DS2E1 S 8 7 6 B SNS_LO TC_LO -5V TC_COMP 13 11 100V OUT_LO 4 4 CR58 100V 1206 GUARD 13 OUT_LO TO A6 K9 9 DS2E1 C129 10P 100V 1206 IGUARD GUARD TO SCOM K5 9 DS2E1 20MIL 4 DS2E1 NC E2 RST GUARD 8 CR68 E13 12RST CR12 GF1G 1 IN_SNS_HI IN_SNS_HI GF1G CR14 2B7 E12 10 FDH300A 6 1W 2512 13 11 GF1G 8 VMID TO OUT 13 CR69 K3 4 DS2E1 1K 9 DS2E1 DS2E1 R19 1K 1W 2512 VMID OUT_220V 8 DS2E1 11 VDIV Z VMID TO VDIV S K3 13 VMID 50MIL GF1G CR17 4 SENSE SELECT CR2 4 DS2E1 20MIL SNS_HI TO VDIV 11 4A3 6 J202 100MIL 9 OUT_HI SNS_HI KEY 5 HIGUARD OUT_LO 220V TO OUT K7 K7 OUT_220V 8 4 A 2 20MIL 9 TOROIDS 1 SNS_HI OSNS_HI 7 8 6 J201 1 100MIL TQ2E OUT_HI IN_SNS_HI TQ2E B 200V 805 HIGUARD TO GUARD K8 4 OUTPUT BLOCK SCHEMATIC C124 22P 200V 805 5 4 3 2 Figure 6-2. A3 Motherboard PCA (cont) 6-6 A Schematic Diagrams 8 7 6 5 6 3 4 P5 R90 +12VGF C108 1/4W CR43 RT5 D 47U 50V R89 L8 1 6TURN P4 -12VGF 1/4W 50MIL 50MIL RT4 DB101S 1A KEY 12GAC2 12GCOM 12GAC1 TAB 7812 0.1U +12VG BI 50MIL 6TURN C78 R69 C66 2200U 4.99K 0.1U 25V 12V 5% OUT GND TO220HS C61 CR33 C65 10U MBRS140 0.1U 25V GGND 5B2 BI I349 M2 50MIL TP47 5GAC2 5GCOM 5GAC1 1 2 3 TP29 TP34 C67 0.1U P1 C2 4.7U 35V AY 50MIL 180M 1 2 3 4 5 6 7 8 IN C1 TP38 L6 U20 +12VG_UNR C68 0.1U OUTGUARD SECONDARIES GF1G TP46 CR46 180M FAN AT MAINS END 0.1U 6TURN 1 1 2 3 C107 L9 C86 R87 C95 2200U 4.99K 0.1U 25V U25 IN TAB 7912 TO220HS C98 CR63 10U GF1G 25V C106 0.1U AY 100MIL 100MIL 50MIL TP44 L10 -12V 5% OUT GND -12VG_UNR G -12VG FROM POWER XFRMR BI 50MIL 6TURN 5B2 CR50 CR59 GF1G RT1 GF1G +5VG_UNR 100MIL CR42 100MIL 180M TP6 1N5822 C38 0.1U IN TAB 7805 +5VG 100MIL 6TURN 5B2 AY C47 1N5822 100MIL 5V 5% OUT GND C60 R59 10.0K 15000U 16V 100MIL BI TP37 L7 U19 +5VG_UNR CR27 C 5B2 GF1G CR22 RT3 180M BI 0.1U 1206 TO220HS C64 C77 CR49 C63 0.1U 100U 16V MBRS140 0.1U I353 M1 C121 R118 R119 0.1U 100V 10.0K 10.0K 1 VR17 G 24V 5% 2 1SMA24CA RT7 D 5AC2 100MIL 100MIL 5COM 180M 100MIL 5AC1 RT9 100MIL BI 3C8 BI 3C8 VR6 BI 3C8 5235 6.8V 5% 100MIL VR9 5235 6.8V 5% TP40 VR8 5251 22V 5% 180M VR7 R93 Q19 8A 200V +45UNR 5251 22V 5% RT8 15AC2 560 1W C109 1U BI 100MIL R94 3D8 C84 CR52 R53 0.1U 100V GF1G 4.99K VR1 15COM BI 100MIL CR40 3D8 C57 S 15AC1 BI 100MIL 100MIL 3D8 CR76 1N4007 CR70 P2 1N4007 CR72 SP200A 1N4007 R64 560K 0.5W C73 47U +180UNR SP+300 BI C62 BI 1 F2 0.2 AMP T5AC1 T15AC2 T15AC1 SHIELD GUARD SHIELD CR62 KBP04M 1.5A BAV199 1 F4 2 SP200B 0.2 AMP SP200B CR77 FROM POWER XFRMR 1 SP200A F5 1.5A 800V KBP08M 2 0.2 AMP 1 R92 560K 0.5W C92 47U F1 R62 R61 100P 1.00K 90.0K 100U 16V U18 2N6520 6 R63 5 15K R85 -15V VR2 R88 A CR78 CR75 SP200B 1 SP400A F6 2 SP400A 0.2 AMP 1N4007 CR71 1N4007 CR74 SP200A 1N4007 1N4007 C74 47U R84 400V 100K TP32 S C37 47U 50V BI 3B8 VR12 5% 47V 1.5SMC47A VR13 TP22 0.1% VR3 12V 5% SMBJ12A -45V 4.99 BI 2N5401 1N4572 6.4V S 2% 7 CR44 1N979B 56V 5% 10K 1W R57 R49 100 Q13 U32 MJE15029 5 BAV74 R76 100K R65 R68 10.0K 100K 330U 100V 560K 0.5W AD822AR Q18 C101 47V 5% 1.5SMC47A +15V 2 400V S 0.1% C85 0.2 AMP SP200A VR11 TP27 TP28 HVCOM C59 7 180AC1 360AC1 50V HVCOM GF1G 330U 100V BI -15V CR54 C83 400V C36 47U 0.1% 200V C91 47U R56 90.0K 0.1U 8 R91 560K 0.5W 2 360AC2 1 180AC2 SP400B 0.2 AMP +45V VR10 12V 5% SMBJ12A 0.1% CR45 S F3 45AC2 HVCOM 45AC1 S TP21 4.99 90.0K 3 2 GF1G R55 S 400V CR28 R48 R54 100 MPSA42 2 AD822AR U31 MJE15028 7 TO220-HSNK S 8 U18 1 4 KEY 1N4007 T5AC2 +360UNR SP+600 TP31 SP200B SP400B INGUARD SECONDARIES CR73 6 8 5 Q12 0.1U TP30 U31 MJE15028 TO220-HSNK 3 BAV74 180M 1A7 BI 100P +15V C58 4 B GUARD 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 1N979B 56V 5% RT10 100MIL 2 4 1 180M 10.0K 3 8 U32 MJE15029 1 6 TO220-HSNK CR26 GF1G 4 R58 TP48 2 TO220-HSNK 4.99K -45UNR -180UNR SP-300 TP33 BI -360UNR BI C97 57LFC-1003 (2 of 5) CR53 0.1U SP-600 GF1G 100V S 8 7 6 5 4 3 2 Figure 6-2. A3 Motherboard PCA (cont) 6-7 57LFC Service Manual 8 7 6 5 3 4 CR41 GF1G 2B6 BI TP42 U21 1B +15UNR IN 0.1U D DB101S 100V BI IN 15V OUT GND 3B 2A DUAL_ASSY C105 15AC2 OUT GND 2B C93 C75 3300U 0.1U 15V DUAL_ASSY 1A CR67 2B6 U21 15AC1 +15V 3A I329 +15V TP23 L4 +15V DUAL_HSNK 35V CR91 47U 50V MBRS140 BI 100MIL 6TURN C50 CR29 C45 GF1G 0.1U VR14 20V 5% 1.5SMC20A TP24 TP25 C104 0.1U I233 BI 100MIL I359 SCOM M3 2B6 BI 15COM C94 C82 3300U 0.1U U22 IN 35V TP43 C76 TO220HS TAB 7915 10U 25V CR92 C46 GF1G 0.1U AY S S TP26 L5 -15V 5% OUT GND -15UNR VR15 20V 5% 1.5SMC20A -15V BI 100MIL 6TURN I331 CR31 CR48 -15V GF1G GF1G CR19 GF1G U14 TP10 R50 OUT ADJ 5AC2 CR51 C C79 2C7 5AC1 BI 5COM GF1G +5UNR IN R52 200V BI 0.1U C40 CR24 C34 100U 16V MBRS140 0.1U BI +5V I333 +5V TP11 L3 U15 0.1U 2C7 C41 200 TO220HS CR36 TP39 KBP04M 1.5A +5RLH 100MIL 6TURN AY ADJ BI MBRS140 L2 IN TAB LT1086 2C7 -15V CR18 MBRS140 CR35 TAB 7805 +5V 100MIL 6TURN BI AY 200 C70 R67 15000U 2.00K 16V 5V 5% OUT GND C52 0.1U R51 604 TO220HS C49 C42 CR25 C35 0.1U 100U 16V MBRS140 0.1U TP7 TP8 I228 BI 100MIL M4 I361 C69 2200U 25V R66 C51 2.00K 0.1U U13 IN TP35 TO220HS TAB 7905 C48 C39 CR23 C33 0.1U 10U 25V GF1G 0.1U D TP9 AY L1 -5V 5% OUT GND -5UNR DCOM D -5V 25MIL 6TURN BI CR34 GF1G +5V +15V C118 SMUX C119 BI CKHVCUR* HVCOM B R44 R43 4.99 1 R45 R42 4.99 1 100K 0.22U FAULT* 0.1U 2 1 0.1U +15V S R33 100K 3 R31 6 499K TP4 R107 100K BAT54A 10.0K U11 7 R26 2.00K C30 0.22U 0.22U 150K AD822AR U11 C29 R32 0.1U 4.99K R28 R110 49.9K S R27 100 +5V 0.1U 5 8 6 4 LM393DT R35 TRIP = +/- 0.65V -15V D 7 10.0K A R41 3 2 TP5 11 100K 4.99K 10 CR86 C116 -45V CR87 10.0K CKIT* 3 U10 13 12 LM339 BAT54A 0.1U TP49 D 8 U12 +5V D 4 LM393DT 9 +45V R115 BAT54A R36 IN +5V R112 10.0K R113 1 0.1U 4 D S 10.0K C32 GND V- -15V 5D4 R114 D OVER22V U27 ADG444 5 S R111 100 S +5V 3.01K 15 16 D U12 R40 V+ D +5V C26 R34 VL 14 BAT54A +5V 10.0K 12 LM339 CR85 C27 0.1U 12 13 2 GND 3 3 U10 2 4 4.99K R21 49.9K S S BI +5V D 1 +VS LM35D VO TP2 D 5245 15V 5% +5V +15V U30 12 LM339 5 453 1A6 BAT54A VR16 S +15V D 6 S AD822AR S S CR84 C25 0.1U R109 4.99K S S R22 0.1U 3 U10 1 7 5 C31 S R20 100 C23 CR83 R25 +5V +5V R108 10.0K +5V 4 C120 D R24 BI +5V -15V 4 C28 2 U27 ADG444 S 8 R29 V+ 1 5 R23 1.00K S 3 GND V- 49.9K +5V C24 R30 VL BAV74 8 2B2 IN D 0.1U 4 5D4 12 13 0.1U BI TP3 CR15 D 3 U10 14 8 57LFC-1003 (3 of 5) 12 LM339 150K R116 49.9K C117 R117 499K 0.1U D D S S -15V 8 7 6 5 4 3 2 Figure 6-2. A3 Motherboard PCA (cont) 6-8 Schematic Diagrams 8 7 6 5 6 3 4 P3 5 4 CR64 MMAC2 100MIL 1 RV5 22V 20% 1MA 2 D 8 +IREF C100 0.1U +15I_UNR CR65 1N5822 CR61 R80 4.99K R74 C71 0.01U 10.0K 8 U23 3 2 R79 4.99K C99 0.1U RFP70N3 AY TO220HS R71 10.0K 4 LM393DT 100K R46 2.2M U34 R70 1 R78 C88 0.1U 1N5822 1 RV4 22V 20% 1MA 2 IN 100MIL 1N5822 MMAC1 100MIL 6 TP15 1N5822 CR60 1.00K TP41 RT6 +MMONGO VR5 5245 15V 5% BAV74 BI 100MIL 100MIL CR47 80M C87 4.700E-02 16V TP14 TP13 TMMCOM MMCOM 100MIL M6 I142 100MIL C53 4.700E-02 16V +15I_UNR CR37 8 U23 7 5 C80 0.1U 6 4 LM393DT C89 0.1U +15I 100K 0.1U 3 4 LM393DT 8 U24 7 6 R75 1.00K R77 8 U24 1 2 BI 100MIL 80M BAV74 R83 R82 4.99K C81 100MIL R81 4.99K MMCOM RT2 -MMONGO +15I BI TP12 C54 0.01U Q17 MMBT3906 R73 10.0K 10.0K R72 3.01K -15I 5 4 LM393DT U33 RFP70N3 R60 VR4 AY TO220HS 1.00K R47 5245 15V 5% 2.2M TP16 -15I 100MIL -IREF C 7 SHIELD ISHLD BI CR21 CR39 RT11 180M 2 15ICOM 1 T15IAC2 C102 0.1U C103 0.1U GF1G TAB 7815 TP20 +15I BI 50MIL AY C72 15V 5% OUT GND C56 0.1U 3300U 35V T15IAC1 U17 IN 50MIL DB101S 1A 50MIL 3 GF1G GF1G CR20 TP36 CR66 +15I_UNR RT12 IN TO220HS C44 CR90 10U MBRS140 25V TP18 TP19 180M 50MIL ICOM 50MIL 50MIL I96 BI M5 C90 3300U 35V TP45 U16 C55 0.1U IN TO220HS TAB 7915 C43 CR89 10U GF1G 25V TP17 AY -15V 5% OUT GND -15I_UNR 50MIL -15I BI 50MIL CR38 GF1G R11 4.99K B +15V C14 10P R14 2.00K CR4 R9 2.00K +15V C15 C12 4.7U 35V 0.1U Q8 2N3904 CR5 GF1G BAV199 S Q7 2N3904 MMBT3904 -15V Q4 CR81 BAW56 +15V C6 BI V3_3 R8 MMBT3906 0.1U 2 R7 BAW56 Q6 7 U2 CR82 10.0 6 3 R6 MC34081 4 1.00K C4 Q5 V3BUF BI 1B7 10.0 32.4 CR79 MMBT3904 BAV74 0.1U -15V TP1 R5 V3B S CR80 BAV74 Q3 MMBT3906 Q2 2N3906 A R2 2.00K S Q1 2N3906 R1 2.00K C3 C5 4.7U 35V 0.1U 57LFC-1003 (4 of 5) CR3 GF1G -15V 8 7 6 5 4 3 2 Figure 6-2. A3 Motherboard PCA (cont) 6-9 57LFC Service Manual 8 7 6 5 3 4 +5V +5V REF DES C96 0.1U C17 0.1U 74HC374 7 6 5 4 3 2 1 0 IN IN IN IN IN IN IN IN IG_DATA7 IG_DATA6 IG_DATA5 IG_DATA4 IG_DATA3 IG_DATA2 IG_DATA1 IG_DATA0 3 D PANEL LED'S 2 IG_DATA<7..0> D P8 4 D U7 7 6 5 4 3 2 1 0 18 17 14 13 8 7 4 3 D7 D6 D5 D4 D3 D2 D1 D0 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 19 16 15 12 9 6 5 2 R17 2.00K DGND 138_HC 04 UCN5800 8 7 7 374_HC VOLTREG3P_DUAL_HSNK 10 HSNK P5V 16 14 13 20 HS1,HS2 1 R16 2.00K R15 2.00K WARNING* OPERATE* NOT INSTALLED STANDBY* CKIT* CKHVCUR* 11 1 PARTNAME U3 U4 U5,U6,U8,U9 U28,U29 U7 U21 OE OUT 3A3 OUT 3B8 OUT CLIN_A R124 +5RLH +5V R104 C110 49.9 0.01U C20 4.7U 0.1U 10 MHZ IN R99 100 86.6 R98 OUT CLIN_B C19 P7 COAX 49.9 C8 0.1U D +5V IN IN IN IG_ADDR0 IG_ADDR1 IG_ADDR2 1 2 3 IG_WR* 6 4 5 D +5V 1 74HC138 Y7 A Y6 B Y5 C Y4 Y3 Y2 G1 Y1 G2A Y0 G2B 7 9 10 11 12 13 14 15 7 6 5 4 C122 0.1U 6 5 4 3 1 2 D IN IN CLR STB OE C OUT OUT 2 K11 1 2 K10 1 2 C10 100P BAV74 U29 UCN5800L SET RST 16 15 DS2E1 SET RST 16 15 DS2E1 SET RST 16 15 R125 COM 74HCU04 D U4 5 IG_CS1 IN CLR_DRVR BI RLY_RST* 1 2 6 IN OUT IN IN OUT CLR STB OE IN 9 10 11 12 C112 4.7U 0.1U DS2E1 15MIL 14 IN 6 5 4 3 C113 86.6 CLOUT_A 1 B1 R97 R102 100 CLOUT_B 3 100 15MIL R96 15MIL 15MIL 49.9 15MIL 7 V+ 2 U26 R101 R103 49.9 1.00K U28 CR88 UCN5800L R105 C111 6 SHDN 8 V4 B2 5 49.9 0.01U LT1223 P6 10 MHZ OUT COAX C114 C115 4.7U 0.1U BAV74 COM -12VG 8 R12 2.00K 3 2 1 0 +12VG 1.00K 15MIL CR6 R106 K9 9 10 11 12 8 14 IN U3 +5V C21 0.1U 7 6 5 4 D 6 5 4 3 1 2 IN OUT IN OUT CLR STB OE COM 1 9 10 11 12 10 K8 1 2 K7 1 K6 2 1 2 K2 J1 T_DS U5 UCN5800L SET RST 5 6 TQ2E SET RST 16 15 DS2E1 SET RST 16 15 SET DS2E1 RST 16 15 DS4E IN SER_CLK_A IN SER_CLK_B F_DS 15MIL 8 14 15MIL 15MIL GGND 15MIL 3 2 1 0 6 5 4 3 74HCU04 U4 3 1 2 4 B IN IN CLR STB OE OUT OUT FIG_B TIG_B IN 9 10 11 12 OUT 15MIL 15MIL TIG_A FIG_A OUT 15MIL IN 15MIL ENCSIG U8 UCN5800L COM CR7 CR10 BAV74 BAV74 ENCRESET* 0.1U 8 14 C18 2C4 BI +5VG 2D3 BI +12VG 2C3 BI -12VG 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 CPU G D +5V 7 6 5 4 C22 0.1U 6 5 4 3 1 2 D IN OUT IN OUT CLR STB OE 9 10 11 12 U6 UCN5800L COM 1 2 SET RST 16 15 K1 DS2E1 1 2 SET RST 16 15 K4 DS2E1 1 K3 2 SET RST 16 15 DS2E1 1 2 SET RST 16 15 K5 GGND DS2E1 15MIL 2C4 15MIL 8 14 J6 BI +5VG_UNR 15MIL 15MIL 3 2 1 0 +5V 74HCU04 C11 0.1U U4 1 6 5 4 3 1 2 2 OUT IN OUT 15MIL ENCRESET* UNUSED 15MIL 15MIL U9 UCN5800L CR8 CR13 CR11 BAV74 BAV74 BAV74 BAV74 13 9 D 74HCU04 8 R13 1.00K R95 7 T_DS F_DS G 10 D 57LFC-1003 (5 of 5) D 8 ENCSIG 10.0K U4 11 A U4 12 R100 10.0K 74HCU04 U4 CR9 8 COM +5VG 15MIL 74HCU04 CLR STB OE 14 D IN 9 10 11 12 6 5 4 3 2 Figure 6-2. A3 Motherboard PCA (cont) 6-10 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 ENCODER Schematic Diagrams 6 57LFC-7605 Figure 6-3. A5 Ohms PCA 6-11 57LFC Service Manual 8 6 7 NOTES: K17 13 UNLESS OTHERWISE SPECIFIED DS4E 1. ALL RESISTANCES ARE IN OHMS. 2. ALL CAPACITANCES ARE IN FARADS. 3. ALL RELAYS ARE SHOWN IN THE RESET POSITION. 9 11 6RST 12 D 8 K29 4 6RST P105 A31 C31 DS4E RST DS4E 2D7 BI BI 2C7 DS4E DS2E1 K20 BI DS2E1 6 3B6 BI BUFHCOMPV 3B5 BI DS2E1 K23 11 HI_CHK 4 3C2 9 13 5 K23 8 HI_SRC 4 RST DS4E K20 6 7 K12 3 5 COMP_RES_HI 8 K12 14 12 RST 2D4 DS4E RST 7 BI D 9 13 11 DS2E1 HI_OHMS_HI 11 DS4E 6RST COMP_EXT_HI COMP_OUT_HI K12 4 10 K17 14 DS4E 9 K29 13 OUT_HI K17 3 11 8 F DS4E 10 9 RST DS4E K17 4 1 3 4 K12 13 RST 8 RST 5 HI_SNS_HI 7 5RST SNS_HI DS4E OHMS_OUT_HI 10 K29 14 OHMS_SNS_HI RST 12 DS4E K26 8 9 K26 K13 3 13 DS4E 4 6 11 DS2E1 K25 12RST K25 9 4 6 11 K2 14 DS4E 7 R47 RST 5 100 K3 14 DS4E C95 7 0.1U R43 S 1 DS4E 5RST 4.99K 3 RST 4 9 K3 13 DS4E 5 K3 3 K3 4 DS4E DS4E RST 11 6 11RST 12 9 RST DS4E 1.90 10 DS4E 8 K2 4 2 6 K38 4 DS4E 8 RST 6 K38 3 K18 4 DS4E DS4E K19 14 DS4E DS4E 7 5RST 100P 3 DS4E K14 3 K36 DS4E 8 4 10 6 RST 12 7 VNC 5 5RST 4 CR13 K27 14 CR9 C79 BAV199 DS4E 0.1U VR3 100V 6V 5% 5233 7 S 5RST R59 15.0K Q5 K27 4 2N5401 DS4E 9 CR11 GF1G 11RST C94 0.1U -45V 100V K19 3 DS4E 10 RST 12 11 11 DS4E 12 K4 4 7 DS4E 1.00 10 10 RST 8 K5 3 DS4E 9 10 RST 6 9 12RST K39 4 8 DS4E RST 6 DS4E 9 7 10 RST 5RST 12 K27 3 6 11RST K27 13 K28 4 DS4E 12RST 12 9 8 10 RST DS4E RST K8 3 DS4E 10 K28 14 DS4E K28 3 DS4E K9 3 8 DS4E RST 6 DS4E 10 12RST S 6RST K30 13 DS4E 5 6 K14 14 K14 13 DS4E DS4E K37 9 RST11 13 11 DS2E1 DS2E1 K15 9 13 8 4 DS2E1 11 DS4E 10 RST 12 K15 9 4 6 DS2E1 6 K40 8 K43 3 DS4E 10 RST 12 7 8 RST RST 5 6 K43 14 K43 13 DS4E DS4E 4 K43 4 6 DS4E K40 9 RST 11 DS2E1 8 7 RST 6RST 5 K16 14 K16 13 DS4E DS4E 8 8 RST 1 4 5 6 6 K16 4 DS2E1 DS4E K7 DS2E1 RST11 DS4E 9 10 11 12RST 7 8 RST 6RST 5 K42 14 K42 13 DS4E DS4E 3 Z3 7 RST 5 7 K39 13 K39 14 DS4E DS4E 8 7 RST 6RST 5 K8 14 K8 13 DS4E DS4E 11 K6 4 K42 3 6 13 9 C 9 13 DS2E1 6 8 4 K39 3 K41 3 DS4E DS4E 10 10 RST12 12RST K8 4 K11 4 DS4E DS4E 9 9 RST11 11RST K9 4 K35 3 7 RST 5 4 5 8 K42 4 DS4E 9 K6 DS2E1 9 13 DS2E1 11 RST 11 Z4 8 1 2 K41 14 6RST K41 13 DS4E DS4E 7 8 RST 5RST 6 K11 13 K11 14 DS4E DS4E 8 7 RST 6RST 5 K9 14 K9 13 DS4E DS4E DS4E DS4E 10 9 RST 12RST 11 7 8 RST5 6RST K35 14 K35 13 DS4E DS4E RST 12 K30 3 K32 4 DS4E DS4E 10 9 RST 11RST 12 K30 4 K41 4 DS4E 9 REFERENCE DESIGNATON LAST NOT USED USED C101 C50,61,62,70 CR18 CR12,14 E1 K43 L3 P205 P1-104,106-204 Q6 R69 R24,29,32-39,62 T1 TP12 U41 U29,30 VR4 VR2 Z5 RST11 K11 3 DS4E 10 RST12 K35 4 DS4E 9 RST 11 B DS4E RST 11 K31 14 DS4E K31 4 DS4E K31 13 DS4E 7 K10 14 K10 13 DS4E 6 8 DS4E 6 K34 3 DS4E DS4E 10 9 RST 12RST 11 7 7 K32 13 5RST K32 14 DS4E DS4E K32 3 K33 3 DS4E DS4E 10 10 RST 12RST 12 8 RST5 6RST K34 14 DS4E Z2 5 RST K10 4 7 RST5 K33 14 DS4E K34 13 12 DS4E K34 4 DS4E 9 RST 11 Z2 8 11 6RST K33 13 DS4E K33 4 DS4E 9 RST11 OHMS_OUT_LO K31 3 9 6RST 5 OHMS_SNS_LO LO_OHMS_LO DS4E 8 7 RST 9 10 14 13 1.90K 15 10 11 LO_SNS_LO 8 K37 K14 4 DS4E DS4E 190 DS4E 13 DS4E RST K18 14 19.0 K10 3 9 DS2E1 K30 14 11 12 K18 13 K28 13 DS4E DS2E1 K1 5RST 8 7 RST K5 13 DS4E K5 4 DS4E DS4E 8 11RST 12 K16 3 4 6 7 RST K18 3 K1 8 S DS4E DS4E 11RST BAV199 DS4E 9 10 RST K7 K4 13 RST 12 K4 3 2 SUB 8 OPA129 RST Z1 K5 14 NC 6 100 9 10 1 V+ K38 14 5RST 6 19.0M DS4E R45 4.99K U40 7 K38 13 7 8 RST 190K S BAV199 R46 5RST 1.90M 100V C93 CR10 8 11RST K19 13 19.0K 0.1U R63 7 6 100K K4 14 4.99K A RST11 5RST 6 8 4.99K C80 OUT_LO 9 7 8 RST R44 MPSA42 6V 5% 5233 A26 C26 9 8 13 DS2E1 Q6 SNS_LO DS4E K36 9 11 DS2E1 R60 8 RST 10.0K 100V K2 3 K2 13 10 GF1G 11RST 12 100 CR15 15.0K VR4 A27 C27 DS4E 10.0M R61 15.0K 9 10 RST Z1 3B8 2A7 BI +45V R58 DS4E 1.00M IZGRD 15.0K K13 13 K19 4 DS2E1 ZGUARD B K13 14 K13 4 DS4E 13 DS2E1 C 6RST 5 4 3 7 8 HIGUARD 10 8 7 RST 1 A29 C29 8 DS2E1 1.00K 2 A32 C32 K29 3 7 RST RCOM1 5 10 COMP_EXT_LO BI 2C7 RST K21 8 BI 3B8 8 K21 DS2E1 K22 9 6 DS2E1 COMP_OUT_LO BI 11 57LFC-1005 (1 of 5) DS2E1 9 13 13 RST K22 4 6 4 6 12 9 8 COMP_RES_LO DS2E1 BI 11 LO_CHK 2C3 BI 3A4 2C7 RST 11 6 5 4 3 2 Figure 6-3. A5 Ohms PCA (cont) 6-12 A Schematic Diagrams 8 6 7 5 1 3 4 6 2WIRE COMPENSATION CIRCUITRY HI COMP VBT+ VBT+ D C23 C47 C45 0.1U 10U 0.1U 25V D F COMP_EXT_HI C22 R4 0.047U 2.2M 3 2 7 V+ 5 R12 10.0K TLC2652AC R14 6 CLAMP V5 4 B2 8 2 100 AY BW R7 U20 BUF634T 4 10.0 COMP_OUT_HI 1D4 BI R6 TO220HS 3 BI F U19 10.0 1 1D5 1 B1 C21 R15 0.1U C35 C38 F 1.00K F 0.1U C40 C42 0.1U 10U 25V 0.1U R5 2.2M F VBTVBT1D4 BI COMP_RES_HI R13 C37 10.0K 100P LO COMP R65 1.00K K24 C100 4 TQ2E 7 +15V 2 K24 8 9 R1 2.2M +15V TQ2E 10U +15V 25V R8 R9 R68 R69 10.0 10.0 10.0 10.0 AY GF1G C31 -15V 7 6 U41 AD825 C99 100 1U 50V NOLOAD 2 R2 2 BW CR18 C101 S 3 COMP_OUT_LO C19 0.1U S 1 BI GF1G +15V BAV199 5 CR17 C30 0.1U CR16 C98 0.1U U18 BUF634T 4 TO220HS 10.0K +15V C96 C20 1A6 C R10 68P 3 8 C -15V R67 3 0.1U S 6 7 10.0K U17 LTC1151C R66 R11 5 4 BI COMP_EXT_LO 4 1A6 COMP_RES_LO BI 1A5 1.00K C26 1.00K 0.1U R3 C97 1.00K S 0.1U 0.1U -15V S -15V S 10U 25V S -15V 2WIRE COMP CIRCUITRY FLOATING POWER SUPPLY Q2 MPS6560,SEL FLOATP B P205 5AC2 11 B CR4 T1 C2 DB101S 2 R31 C68 C67 C46 1000U 1000U 1000U 1.00K 5AC1 9 10 U24 0.1U 5 5 C64 C41 C63 1000U 1000U 1000U 4 VR1 4040 2.5V F C48 4.99K R22 10U 25V 100 F 7 OP284 C66 6 5520A-6503 R23 C65 8 4 A2 TP3 VBT+ +3.75V WITH RESPECT TO FCOM TP1 R20 10.0K C44 F 0.1U 0.1U F C39 F 10U R21 25V TP2 F 10.0K Q1 FLOATM -5V WITH RESPECT TO FCOM MPS6562 R30 R16 10.0K 3B8 1C7 BI VBT- 4.99K IZGRD R18 10.0K C43 0.1U 2 8 3 4 R19 1 R17 U24 OP284 100 10.0K F F A 57LFC-1005 (2 of 5) 8 7 6 5 4 3 A 2 Figure 6-3. A5 Ohms PCA (cont) 6-13 57LFC Service Manual 8 6 7 5 1 3 4 +15V 1.00K 100K 10.0K 6 5 Z5 3 4 1MEG 1 Z5 10MEG 2 Z5 10.0K 9 10 Z5 25.0K 8 11 7 +15V D +5V +15V C53 +5V +15V C33 C34 0.1U 0.1U +5V +15V C28 C29 0.1U 0.1U C24 C25 0.1U 0.1U D ISELGRD ADG444 2 3 13 12 U23 16 14 VL U22 V+ 1 15 2 3 U22 14 15 ADG444 4B5 0.1U D S ADG444 GND 5 S 12 U23 13 8 U21 9 P105 11 5 4B5 VL 13 ZIVREF* IN U28 1 0.1U 6 7 12 C59 15 7 8 U28 ADG444 6 7 SWRCOM 3 7 11 5 7 10 ADG444 4 ADG444 ADG444 4 5 5 4 4 IN ISELUA* 4B5 IN ISELTUA* 4B5 IN ISELHUA* 4B5 IN ISELMA* Q3 4 3 2 1 TO72 C TO72 1 5 BI 1D3 10.0K 0.5% 0.1U 4 S 10 PPM/C 12 4B5 CKIVREF* IN C56 R28 4 3B8 1A5 BI 6 ADG444 5 R27 AD707K 2.2M RCOM1 U25 U27 6 2 4 5 10 4 IVREF S RCOM1 8 13 4B5 IN U22 9 -15V 3 -15V A20 4B5 1.00K 2 C54 ADG444 0.1U RCOM2 INRCOM* U21 HI_SRC 14 C57 -15V 12 U22 8 13 13 ISELHNA* AD823 7 R25 4 1.00K U28 16 +15V 0.1U S 2 13 Q4 U26 4 5 4 5 AD707K R26 6 3 V- D C55 S ADG444 2 3 8 +15V 4B5 S V+ GND IN 4 C72 0.1U 12 C71 D C20 12 +15V 0.1U I_ACDC 13 4 +5V +15V C19 11 ADG444 ADG444 C U23 9 7 10 5 12 6 6 IFBCK A19 13 S -15V 12 12 C27 0.1U D -15V 13 V- 4 5 C32 0.1U D -15V 12 U21 V+ 2 V- 4 5 4 S -15V INIVREF* IN GND 5 C36 VL 1 3 ADG444 V- 5 GND 4 C52 0.1U S 13 16 ADG444 12 D 13 S 4 U23 V+ 12 D 12 VL 1 2 4 S 13 3 D 13 8 S U25 AD823 1 12 0.1U 13 U28 9 11 10 ADG444 0.1U S 5 4 -15V +15V 1D2 BI HI_CHK 12 U17 LTC1151C 1 8 S 3 4B5 IN CKHI* 13 U21 16 14 15 2 4 ADG444 5 4 12 13 -15V B 4A5 2A7 1C7 BI IN CKCOMPV* 14 +15V IZGRD U32 16 R56 0.1U 7 100K U31 5 100K BUFHCOMPV BI 1D4 0.1U 3 5 4 100K SMUX 12 S 4A5 U36 IN CKEXTRA* 2 S 13 U32 8 6 7 4 C49 0.1U C21 C73 2 R64 P105 4 +15V S AD707K 6 3 R57 B 15 ADG444 C69 ADG444 12 LM339 5 4 12 13 S -15V S 7 U36 3 1 +15V 6 12 LM339 4A5 1A4 R52 BI IN CKLO* LO_CHK 11 5 9 +5V +15V C58 12 0.1U VL A 4A5 IN ENCOMPFAULT* 1 0.1U 5 4 10.0K 10.0K R54 R55 24.9K 24.9K 4.6225V 11 U36 P205 3 FAULT* 13 C23 10 12 LM339 57LFC-1005 (3 of 5) HARDWARE FAULT TRIP POINT +/-11.51V R50 C89 R53 10.0K 0.1U 10.0K C51 0.1U -15V 7 R51 LM339 10.0K V- D 8 R48 R49 2 GND 8 S ADG444 3 U36 3 12 U32 V+ 4 14 +15V C60 13 D 10 ADG444 10.0K 10.3775V U32 9 S IZGRD TRIP POINT +/-34.5V S S 6 5 4 3 2 Figure 6-3. A5 Ohms PCA (cont) 6-14 A Schematic Diagrams 8 6 7 5 4 6 1 3 TP6 P105 +45V A8 C8 TP5 A10 C10 -45V TP8 D A2 C2 +15V D L2 +15V 95 OHM A3 C3 A7 C7 A9 C9 A11 C11 A13 C83 C84 10U 0.1U 25V TP4 E1 TOP SHIELD SGND C13 A17 C17 A22 C22 A24 C24 A28 C28 A4 C4 S C82 C81 10U 0.1U S 25V TP7 L1 -15V 95 OHM CR6 -15V MBRS140 CR5 P205 A30 C30 TP11 MBRS140 +5RLH C88 C87 10U 0.1U 25V C C D TP9 A26 A27 +5V L3 +5V 95 OHM C85 C86 10U 0.1U 25V A6 C6 A11 C11 A14 C14 A19 C19 A22 C22 A25 C25 C26 A28 C28 A29 C29 A31 C31 TP10 DGND D +5V C92 0.1U +5V D U39 74HC374 TP12 C91 0.1U C27 -5V 7 6 5 4 3 2 1 0 5B8 OUT D U38 +5V B 74HC138 A12 C12 A13 0 1 2 0 1 2 IG_ADDR<2..0> R41 A18 IG_CS6* 2.00K 1 2 3 A B C 6 4 5 G1 G2A G2B Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 7 9 10 11 12 13 14 15 18 17 14 13 8 7 4 3 1 C17 IG_CS5* OUT OUT OUT OUT OUT OUT OUT OUT OUT 3C3 3C4 3C4 3C5 3C6 3C7 3D8 3C8 B +5V 0.1U D 74HC374 7 6 5 4 3 2 1 0 D OUT ISELMA* ISELHUA* ISELTUA* ISELUA* ISELHNA* ZIVREF* INIVREF* INRCOM* OE U35 100P IG_WR* 19 16 15 12 9 6 5 2 C78 CR8 C20 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 11 C76 BAV74 D7 D6 D5 D4 D3 D2 D1 D0 5B8 5B8 18 17 14 13 8 7 4 3 D7 D6 D5 D4 D3 D2 D1 D0 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 19 16 15 12 9 6 5 2 CKIVREF* CKHI* CKLO* CKCOMPV* CKEXTRA* ENCOMPFAULT* OUT OUT OUT OUT OUT OUT 3C6 3B4 3A4 3B4 3B4 3A8 11 OUT 1 5A8 OE IG_DATA<7..0> A C10 A10 C9 A9 C8 A8 C7 A7 PULL_DOWN 7 6 5 4 3 2 1 0 BI 5A8 R42 1.00K D A24 CLR_DRVR A23 RLY_RST* 8 OUT 57LFC-1005 (4 of 5) 5A8 BI 5A8 7 6 5 4 3 A 2 Figure 6-3. A5 Ohms PCA (cont) 6-15 57LFC Service Manual 6 7 7 6 5 4 +5V C2 0.1U +5V 1 2 D IN IN CLR STB OE 14 D 6 5 4 3 C75 5 OUT OUT 9 10 11 12 7 6 5 4 1 3 4 +5RLH C3 C1 0.1U 10U 25V U3 UCN5800L D COM 8 8 1 K5 2 1 K4 2 1 K3 2 1 K2 1 K26 2 2 K28 1 2 1 K27 D 2 14 C8 0.1U 6 5 4 3 1 2 D IN IN CLR STB OE SET RST 16 15 DS4E SET RST 16 15 DS4E SET RST 16 15 SET RST 16 15 DS2E1 SET RST 16 15 0 RR4<7..0> DS4E 1 15 0 RST 16 1 UCN5800L SET DS4E 2 15 3 RST 16 COM DS4E DS4E UNUSED C11 +5V 7 6 5 4 SET 4 U4 5 OUT CLR STB OE 4 IN 5 1 2 12 3 2 1 0 6 U33 9 10 11 12 7 74HCU04 13 4 OUT 6 D IN 8 6 5 4 3 3 2 1 0 7 0.1U OUT OUT 9 10 11 12 7 6 5 4 74HCU04 74HCU04 U34 0.1U 9 D U34 8 3 6 1 4 +5RLH 74HCU04 +5RLH U12 UCN5800L 1 K41 2 1 K39 2 1 K33 2 1 K32 74HCU04 U34 2 COM C7 C18 0.1U 10U 5 U34 2 1 2 6 UCN5800L IN OUT CLR STB OE 1 K12 K31 2 1 SET RST SET RST 16 15 16 15 1 K21 2 2 1 K17 2 74HCU04 U34 9 10 11 12 3 2 1 0 DS4E RR1<7..0> SET DS4E 16 RST 15 SET DS2E1 RST 16 15 6 13 DS4E U14 COM 1 2 IN OUT CLR STB OE COM 14 D OUT C5 9 10 11 12 7 6 5 4 0.1U C77 1 K30 0.1U 1 K1 2 1 K25 2 2 1 K29 2 UCN5800L U33 0 4 1 2 RST 16 15 SET RST CLR STB OE 16 15 SET RST 16 15 SET RST 16 15 U34 RST 16 15 UCN5800L SET RST 16 15 DS2E1 1 K7 2 4A7 IN BI 4A7 IN 4A7 BI 1 K6 OUT IN OUT CLR STB OE 11 9 10 11 12 3 2 1 0 2 U5 UCN5800L SET RST 16 15 SET RST 16 15 DS2E1 RST 16 15 IN OUT IN OUT CLR STB OE COM 10 1 2 7 6 5 4 U13 UCN5800L IN OUT IN OUT CLR STB OE COM U1 9 10 11 12 1 9 10 11 12 3 2 1 0 K42 0 15 DS2E1 B C9 1 2 SET RST 16 15 1 K10 2 SET RST 16 15 DS4E K16 2 SET RST 16 15 1 DS4E K18 2 SET RST 16 15 1 K34 2 1 SET RST 16 15 1 K38 K35 2 SET RST 16 15 DS4E 0.1U D DS4E 2 1 K9 2 U8 UCN5800L DS4E DS4E SET RST 16 15 SET RST 16 15 DS4E DS4E RR5<7..0> UCN5800L COM CR3 CR2 CR1 BAV74 BAV74 BAV74 57LFC-1005 (5 of 5) PULL_DOWN RLY_RST* 6 RST 16 DS2E1 CLR_DRVR 7 SET DS2E1 D RR6<7..0> COM IG_DATA<7..0> 8 1 0 SET 0.1U COM RLY_STROBE<7..0> 4A6 DS2E1 1 K36 2 4 SET 1 K37 2 5 7 6 5 4 U10 IN 14 DS4E 0 DS2E1 1 2 RR0<7..0> DS2E1 3 DS4E 4 3 2 1 0 5 OUT 9 10 11 12 6 IN 6 5 4 3 74HCU04 SET 7 OUT 14 A 3 IN 3 2 1 0 D 8 74HCU04 6 5 4 3 D +5RLH U2 6 5 4 3 1 2 +5V D 5 3 2 1 0 OUT 14 0.1U IN 7 6 5 4 0.1U 8 6 5 4 3 IN 9 10 11 12 1 K40 2 +5RLH +5V UCN5800L 8 14 C16 7 6 5 4 6 5 4 3 1 2 12 C12 +5V OUT DS4E C13 +5RLH 4 14 3 2 1 0 COM OUT 15 +5RLH U7 IN RST 16 4 5 D SET DS4E 0 U33 1 D 15 RR7<7..0> COM IN CLR STB OE RST 16 5 74HCU04 D 1 2 SET 1 CR7 6 5 4 3 6 5 4 3 DS4E K43 2 4 3 2 1 0 100P 15 0 C74 RST 16 5 14 2.00K 0.1U SET DS4E 1 OUT CLR STB OE 7 6 5 4 15 1 0 IN 9 10 11 12 RST 16 6 1 2 OUT UCN5800L SET K14 2 2 0.1U IN 7 6 5 4 14 6 5 4 3 U11 1 K15 2 14 C10 7 6 5 4 OUT CLR STB OE 3 2 1 0 0 1 2 3 4 DS2E1 0.1U 0 +5V R40 BAV74 15 1 7 6 5 4 3 2 1 0 8 14 7 9 10 11 12 13 14 15 D B 16 C17 2 IG_CS5* DS2E1 COM 3 IN 15 +5V 4 4A7 G1 G2A G2B 16 UCN5800L 5 IN 6 4 5 DS2E1 U16 6 4A7 IG_WR* Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 15 7 IG_ADDR<2..0> A B C 16 TQ2E RR2<7..0> RST 8 IN 4B7 1 2 3 6 SET C6 74HC138 0 1 2 CLR STB OE 5 RST IN 9 10 11 12 1 1 2 8 D U37 +5V 9 OUT 3 2 1 0 SET 1 2 2 C 1 7 2 IN 9 10 11 12 RST 1 OUT K13 2 3 U33 0.1U OUT SET 5 74HCU04 IN RST 6 C90 6 5 4 3 SET 7 3 2 1 0 +5V 8 14 U33 7 IN 1 1 74HCU04 COM 6 5 4 3 K19 2 DS4E 5 1 K20 2 4 1 K23 2 1 2 1 K22 2 15 COM 6 1 K24 10 UCN5800L RST 16 6 3 2 1 0 +5RLH U15 SET 5 D UCN5800L K8 2 DS4E 6 OUT 0.1U 15 1 2 CLR STB OE 7 6 5 4 RST 16 2 D IN 9 10 11 12 U9 3 1 2 OUT D OUT CLR STB OE 7 0.1U IN C15 OUT IN 14 6 5 4 3 1 2 IN 7 6 5 4 3 C4 9 10 11 12 7 UCN5800L 6 5 4 3 3 C14 7 6 5 4 SET 4 +5V U6 7 6 5 4 8 14 +5V K11 2 DS4E 0.1U C 1 5 15 2 16 3 DS4E 7 15 D D 8 16 RST 8 DS4E SET 8 15 RST 0 16 DS4E RR3<7..0> SET 1 15 RST 2 16 SET 3 COM RST 4 CLR STB OE SET 5 OUT 3 2 1 0 8 1 2 10 IN D 9 10 11 12 8 11 OUT 8 U33 3 IN 6 74HCU04 6 5 4 3 7 3 2 1 0 8 14 25V 5 4 3 2 Figure 6-3. A5 Ohms PCA (cont) 6-16 A Schematic Diagrams 6 57LFC-7606 Figure 6-4. A6 Digital Synthesis PCA 6-17 57LFC Service Manual 8 7 6 5 4 3 IDAC X2 IN 2C3 5C7 IN 6C5 IN 8B7 IN 8D4 2 1 +5V C84 13 D U18 AD768 D 8B7 1B8 7C6 8A3 IN IN PRI_CH<15..0> U32 MDG444 7 C28 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 DDS_CLK_OUT 7 8 9 10 11 12 13 14 17 18 19 20 21 22 23 24 D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 16 CLK IOUTB 27 28 R47 51.1 S 3 R10 REFCOM 5 499 IREFIN 6 COMP 2 REFOUT DCOM VEE 15 26 1 2 X 3 4 Y 11 L1 7 4 REFADJ U4 AD830 8 1 LADCOM R41 51.1 C33 330P 3.6K 5% R50 910 U53 AD7545AK 19 S 11 10 9 8 7 6 5 4 3 2 1 0 20K 5% S U34 C36 0.1U 74LCX16245 S V CHANNEL D/A 5V_DAC S 5VPR R196 100 5V_DAC + C150 C151 0.1U 10U C 11 10 9 8 7 6 S S C152 0.1U S C153 0.1U 5V_DAC 26 27 29 30 32 33 35 36 A7 A6 A5 A4 A3 A2 A1 A0 24 DIR 25 G 23 22 20 19 17 16 14 13 B7 B6 B5 B4 B3 B2 B1 B0 11 10 9 8 7 6 IN SCALER_OUT<11..0> 8C7 IN PRI_STROBE 8C7 IN SEC_STROBE 8B2 8D4 8B7 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 1D8 7C6 8A3 IN DDS_CLK_OUT 7 8 9 10 11 12 13 14 17 18 19 20 21 22 23 24 D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 16 CLK IOUTA 1 IOUTB 27 LADCOM 28 REFADJ REFOUT 3 REFCOM 5 IREFIN 6 COMP 2 VEE 26 OUT 3D3 5% 1 C22 +15V 4.3P Q8 S PMBF4391 -15V 2 S 7 2 3 TP6 DDS1 OUT 6 U25 4 AD845K -15V 8B7 IN 5D3 6D8 8B2 8A7 IN 8B2 IN VOLTAGE ERROR OUT 15 16 7 8 9 10 11 12 13 14 DAC_CS<0>* IG_DATA<7..0> 7 6 5 4 3 2 1 0 6 IG_ADDR<0> CURRENT ERROR OUT VREF1 CS WR 3 DB7 RFB1 DB6 DB5 2 DB4 OUT1 DB3 20 DB2 OUT2 DB1 DB0 19 RFB2 DAC1/DAC2 AGND VREF2 18 IN 3C2 IN 4B2 OUT 8C7 OUT 4C3 C +15V 8 2 3 1 R21 U35 51K 5% 4 AD823 +15V +15V S 8 -15V 2 6 43.2K 5 1 3 U90 4 TL062 8 R5 7 U90 4 TL062 S -15V S +5V C39 49.9K R19 R167 10K 5% +15V U56 AD7545AK 19 2 6 R20 3 10K 5% R16 R23 51.1 49.9K R8 51.1 R3 33P 7 S U23 4 MC34081 C37 33P -15V S R17 SCALER_DAC<11..0> 5% 11 10 9 8 7 6 5 4 3 2 1 0 4 5 6 7 8 9 10 11 12 13 14 15 17 16 10K C18 0.1U DB11 VREF DB10 DB9 20 RFB DB8 DB7 DB6 DB5 1 DB4 OUT DB3 DB2 DB1 DB0 C30 200P R143 R142 402K 402K WR CS C126 2.2U R131 2.2M PE 5% P<5> +15V S -15V 8 6 7 5 U35 4 AD823 S -15V AGND DDS2 OUT NOTES: UNLESS OTHERWISE SPECIFIED B 1. RESISTORS ARE IN OHMS, 1% TOLERANCE, CERM OR MF SURFACE-MOUNT. 2. NON-POLARIZED CAPACITORS ARE CERAMIC, 25V, 50V OR 100V SURFACE-MOUNT. POLARIZED CAPACITORS ARE TANTALUM. 2 S C14 0.1U -5V 8C7 -15V C29 0.1U S SEC CHANNEL SCALE DAC S I CHANNEL D/A PE D 3 U47 AD7628K 4 499 D IN AGND 1 10K 5% S P<4> 402K R29 2.2M C40 2.2U S D 4 402K 2 PRI CHANNEL SCALE DAC G C31 25 S S DIR 0.0018U 15 5 4 3 2 1 0 R25 VDD DCOM B7 B6 B5 B4 B3 B2 B1 B0 S 7 C103 0.1U SEC_CH<15..0> B 1 48 +5V IN A7 A6 A5 A4 A3 A2 A1 A0 5% R35 S 74LCX16245 5V_DAC U17 AD768 8B7 WR CS S S 5 4 3 2 1 0 R166 10K R28 R129 2.2M 17 16 COMP DACS 12 11 9 8 6 5 3 2 7.50K C145 0.1U 200P DB11 VREF 5% DB10 DB9 20 DB8 RFB DB7 DB6 DB5 1 DB4 OUT DB3 DB2 DB1 DB0 U34 37 38 40 41 43 44 46 47 D +5V 8C3 C143 4 5 6 7 8 9 10 11 12 13 14 15 S S 7.50K R114 -15V 5% -5V HF/LF* IN R141 R162 4 R22 R11 D LF/HF* OFF EN* 402K -15V C32 0.1U S V- R9 681 5 S 6 150UH S C21 0.1U 1 2 16 15 9 10 8 7 14 0.0018U IOUTA V+ 3 +15V 25 VDD 10KHZ_LPF* +15V 0.1U S REF DES A PARTNAME U1 U2 U7,U8,U11 U12 U15,U22,U24 U26,U29 U31-33,U46 U48,U82 U16 U19 U34 7C4098 EPC1_PLCC 374_HC EPC1_DIP MDG444 U43,U45,U96 U47 U53,U56 U54,U83,U95 U64 U65 DG444 AD7628K AD7545A UCN5800 14 DS8923A 00_AC 04 16245_LCX 5VPR 5V_DAC DGND 12,34 10 10 5 P5V P15V SGND 11,33 18,20 20 7,8 12 5 7 14 14 7,18,31 42 12 17 18 7 7 6 13 14 3 7 4,10,15 21,28,34 39,45 5 5 3 REFERENCE DESIGNATON LAST NOT USED USED C158 C148,149 CR20 CR12 DS3 K9 K4,5 L30 M3 P206 P2-105,107-205 Q8 R204 R134,135,144-151 R155,158,171-195 S1 T2 TP15 U99 U49,63,68-70,72-81 U85,86,88,89,91-94 VR3 Y1 Z11 Z9 57LFC-1006 (1 of 8) Figure 6-4. A6 Digital Synthesis PCA (cont) 6-18 A Schematic Diagrams 8 7 6 5 4 3 2 6 1 +15V Z10 9 6 10.0K +15V 8 2B6 IN 2A5 IN DAC1PREF 14 DAC1NREF 11 6 220_OHM +15V 10.05K 34.8K 6 0.001U L13 4 0.15U PPS NP<0> U19 8D3 IN P<2> 1 R72 R75 34.0K R73 1.00M 5V 5% U59 78L05 IN OUT GND C45 0.1U C125 0.1U S 25V IN P<1> Z11 9 U36 MC33172 10.0K +15V U43 ADG411 2B6 2A5 IN DAC2PREF 14 IN DAC2NREF 11 6 +7VREF 1 C L14 Z11 13 220_OHM +15V 10.05K 34.8K C95 L15 1 3 4 0.15U PPS 8C3 IN 8C3 IN P<3> 13 IN 8A3 100 13 B U46 MDG444 1 2 16 15 9 10 8 7 3 14 11 6 3 220_OHM S 4 R45 Q5 MMBT3904 U27 LTC1050 C74 C132 2.2U PE 2D6 OUT 2C3 2D3 5D5 C75 0.001U Z11 10 0.47U 1 PPS PE 8 S 6 Z11 14 7 U36 MC33172 -7VREF 5 IN 2A5 2C3 4 DAC1PREF B S R71 1K 0.1U S C47 0.001U 5% C60 2.2U 4 OUT 4B4 22.1 +7VREF V- R64 100 6 OUT OUT 10.05K +15V 10.0K 2C6 IDAC OUT -15V 0.1U 7 L29 DAC2PREF 1D4 5C7 5 LP FILTER 22.1 2 V+ R40 C130 +15V R56 34.0K S 3 C97 OUT Z1 5520A-4R10T-N 2 34.8K MC34072 1 M2 5% +15V C70 0.15U R30 100K R139 390 Z11 -15V S C53 0.001U R65 -15V PPS IDAC X2 3 12 0.15U 7 4 15M 5% 200 5% +15V R54 34.0K R12 R7 R159 NPCLK IN C71 8 220_OHM 5 74HCU04 12 1.00M PCLK U28 L11 U58 4 LTC1151C 220_OHM 6 U19 8D3 +15V C72 -15V NP<1> TP2 8 2 0.001U V- 2B6 2D3 5D5 34.8K 4 2 IN Z11 11 4 2 7 Z11 8 2A5 2B3 -15V -15V 1 2 16 15 9 10 8 7 3 IN 4 3 5500A-8102 V+ -7VREF 3 U52 MC33172 8 13 C PPS 2 1 +15V 8C3 0.47U 1 8 Z10 14 10.0K 6 3C5 10.05K +15V PE 1 S OUT C73 0.001U Z10 10 LP FILTER OUT SEE POWER/ GROUND CHART + C127 10U VDAC OUT 5 S S S S 5C7 Z2 5520A-4R10T-N 2 7 C88 R76 34.0K -15V S 5VPR 8 Z10 34.8K MC34072 OUT 3 -15V PPS 4 C77 0.15U U58 LTC1151C 1 15M 5% R70 100K +15V 4 0.15U 8 2 220_OHM 3 74HCU04 2 220_OHM C78 U28 L10 -15V VDAC X2 7 5 +15V C76 IN TP1 8 V- 8A3 D C94 14K D Z10 13 2 Z10 12 3 14K 3 L12 -15V 1 2 16 15 9 10 8 7 2B6 2C3 5D5 34.8K 4 V+ IN Z10 11 4 6 5500A-8102 13 U45 ADG411 +7VREF 5 7 14K IN U52 MC33172 14K 8C3 P<0> S S C56 0.1U S PE -15V PRECISION INVERTER C52 1 Z4 R6 SEL R6, Z3 AND Q1 ARE PART OF MATCHED SET 5520A-4501; PART NUMBER 626678. 0.001U 1.778K R48 R61 1K M3 6 3 4 2 U38 LTC1150 Z4 DAC2NREF OUT 2C6 -7VREF 3.3K OUT A20 RCOM1 RCOM2 C20 RCOM2 M1 C48 0.001U MMBT3906 -15V C82 0.1U A 7 Q1 RFAMP-4321 C128 0.1U 2 Z4 1 S R138 470 S TC_LO TP14 5% NET_PHYSICAL_TYPE=50MIL RET_LO 4.445K REF AMP S 3 S1 COMMON -15V SGND S 8 RCOM1 2B3 2C3 10 Q4 270P 3.2K 8842A-4R06T-H R1 R51 Z4 -15V 8 2D6 22.1 9 C4 Z3 8842A-4R05T-H R2 R3 OUT P106 CR6 BAV99 7 2 220_OHM 3 DAC1NREF 22.1 5% L28 A S +15V 2 7 6 5 MECCA SENSE1 4 OUT 5B5 OUT 3B4 OUT 3A5 3A7 3D6 4A7 5D7 OUT 3B8 57LFC-1006 (2 of 8) 3 2 Figure 6-4. A6 Digital Synthesis PCA (cont) 6-19 57LFC Service Manual 8 7 6 NET_SPACING_TYPE=1000V Z5 1 5 +15V 13 4 C134 6 U98 6C6 4 LT1007 IN 4C5 5C7 -15V IN 1 SMUX 2 L18 C32 A32 VDIV 8 VDIV 220_OHM NET_SPACING_TYPE=1000V K3 K3 4 13 5 6 9 C135 11 6 Z5 7 -15V V+ VLF* IN 16 +15V R24 34.0K 7 R66 2 6 3 3 R104 34.0K C137 0.22U 6 C138 0.22U -15V R55 R57 3K 5% 1.50K S C27 A27 SNS_LO 6D6 R79 +15V CM COMP<2..0> 0.1% 1206 IN SNS_LO R31 R197 1.00K 1.02K 1206 805 0.1% CR14 CR15 GF1B GF1B 1 R42 1% 105 1% R90 R198 0 75.0 1% 805 3 805 2D3 IN 7 2 S -15V -15V S VOLTAGE ERROR OUT OUT +15V V- 3 4 2 805 +15V 3 -15V K8 4 9 13 11 8 S 205K 4 5 C50 0.01U 6 FAULT* 7 R74 100K 6 OUT 34 7A7 S U50 LM393DT C156 603 S 0.1U S 2 R59 6 U99 4 AD825 1.5KE11A 1 R78 205K S VR3 11V 5% U50 8 LM393DT 0.1U 7 CR13 DB101S +15V R58 24.9K -7.5V C155 6 R199 COMMON MODE REDUCTION S 500 1 Z8 S 5520A-4R09T-H 55.555 R77 24.9K K7 9 13 11 8 2 220_OHM 6 B 16 1 2.00K 12 6C6 6C6 6C6 IN IN IN LOCAL_AC_FB* IN V3_3 9 3 2.2U PE 14 7 AD845K 6 15 2 11 6 -15V 4 -15V Z7 2K 5% +15V 4 Z7 S1 COMMON R53 2K +15V 3 2.00K IN R32 130 R52 2K 5% 5% BAV99 2A4 RET_LO IN 4 A -15V R80 20K R160 1K 5% 5% -15V 5% +15V C23 MMBT3904 L5 R1 8 5 5% R49 2K 5% 5% C26 0.1U 11 PPS Z7 L7 6 7 Z7 10 9 2.00K PRI_XING_STROBE S OUT 8A6 Z7 8 +15V 2.00K 4A7 3D6 3A7 2A4 5D7 IN S1 COMMON S 6 C58 C49 0.15U 100P 4 PPS 8 6 220_OHM 5 -15V R100 3 100 -15V +15V 0.15U R2 150K U3 AD706 7 220_OHM C61 2.00K U51 6 LM319 S 150K 0.1U R38 130 AC/DC AVERAGING CONVERTER R98 1K -15V 7 -15V L4 S U84 4 TL062 S C51 57LFC-1006 (3 of 8) 220_OHM 100P R4 150K 7 S 2 6 3 U39 C57 0.15U 4 OP07 5% PE RIPPLE FILTER -15V S 8 S 7 RET_LO CR5 Q2 12 5 A26 C26 BAS70-04 R46 2K 4 BAT54S -15V TP12 U20 R82 1K 11 R101 1K 5% CR4 V- R43 16.5K 6 4 AD845K +5V +15V 6 5A7 5C7 NET_PHYSICAL_TYPE=200MIL MMBT3906 5% 7 +15V 2 B OUT CR20 S C17 0.1U 10K 5% 3 U24 MDG444 PMUX 6 Q3 2 3 R81 U44 7 LT1360 V+ 4 6 2 5520A-8107 V4A7 2A4 3A5 3D6 5D7 ZCAL* 8 R154 7 2.00K 4 R63 402K IN 6 11 8 2.00K U40 C55 3 13 6D6 4 13 6 13 VMID -15V 14 3C1 5B7 Z7 4 K6 50.505 +15V U96 ADG411 V+ LV ENABLE* 5 9 13 11 8 +15V 13 KV ENABLE* Z7 2.00K +15V K9 S 5 Z8 A23 C24 +15V 5000 Z7 P106 L19 VMID 4 7 1 2 16 15 9 10 8 7 1C3 +15V S DC_COUPLE* C 1K 5% ERROR INTEGRATOR FAULT DETECTOR IN 3A8 5B7 R60 4 POLARITY INVERTER -15V 6C6 OUT 100P V- -7.5V V3_3 C46 3 U87 4 TL062 V3_3 220_OHM -15V VDAC OUT 4.87K S MECCA SENSE1 5 22.1 A12 C12 4 4 -15V U57 1% IN 100K 4 LTC1050 220_OHM -15V 4 LTC1050 11 22.1 1% 1206 2A4 6 C98 0.01U P106 L26 R67 6 34.0K 14 R36 1.00K 0.1% S U60 L17 7 R200 3 1 2 16 15 9 10 8 7 2 1.00K 5C7 220_OHM 3 4 R69 2 2 V+ IN 16.5K 6 6 U48 MDG444 1 8 3 6 V- 13 V+ 7 2 +7.5V U26 MDG444 13 Z MULT* IN 100K +15V L16 7 10K 5% +15V +7.5V V- 1U PE 2.43K 6C6 PPS 11 SENSE BUFFER R62 4 U42 AD845K 7 R83 -15V +15V U48 MDG444 8 V- 74HCU04 8 R68 14 R107 43.2K V+ C69 -15V R37 3.3 VOLT AMPLIFIER 14 0.47U 6 +15V 13 4 C68 C 0 4 -15V TP13 U48 MDG444 V+ U19 3 -15V 2 SENSE CURRENT CANCELLATION 1 U21 4 AD845K 5% U31 MDG444 74HCU04 4 3 9 U15 MDG444 11 13 4 V+ 2 3K 5% +15V U41 AD845K +15V R168 1K U48 MDG444 V- U19 V- 1 2 16 15 9 10 8 7 3 10 15 +15V 8 9 DDS1 OUT 16 13 5.00K IN V+ DCV/ACV* 14 5.00K 7 0.1U 7 1C3 IN 4 15 Z5 6C6 V- -15V 6D6 4C5 TP11 U24 MDG444 13 CR7 MMBD1503 P106 13 3 +15V 1000V SENSE BUFFER 50.0K V+ VLOOP DIAG* 7 0.1U LOOP POLARITY 6 S1 COMMON 3 IN IN 13 +15V Z5 4 6C6 2 D +15V 7 8 11 6C6 IN +15V 2A4 3A5 3A7 4A7 5D7 K2 1 10P 0.1U K2 V FB SEL<3..0> C144 5520A-2702 NET_SPACING_TYPE=330V K1 9 10 500K 7 4 13 9 11 C154 Z5 330V 330V 9 2 2 3 16.667K K1 6 D 3 Z5 2 5.00M 8 4 6 5 4 3 2 Figure 6-4. A6 Digital Synthesis PCA (cont) 6-20 A Schematic Diagrams 8 7 6 5 R121 D 4 3 2 1 +5V D 10K 5% +15V R86 1K +15V P106 I_PHASE A18 IPHASE 7 3 U55 LT1360 CR8 9 10 -15V SEC_XING_STROBE 7 BAT54S 4 5% 11 R119 1K 5% 6 2 R84 20K R161 1K 5% 5% 6 6 8C3 OUT U51 LM319 8 -15V S S R85 1K +15V 5% 13 S 6C6 IN V+ LOCAL FB* R137 15 14 16.5K V+15V 4 13 6C6 IN 5C7 3D5 IN -15V V+ ILOOP DIAG* 8 SMUX 7 TP7 U33 MDG444 R169 6 C +15V 2 L30 A19 DDS2 OUT 10 C U33 MDG444 11 4 U19 C63 11 74HCU04 10 -15V +15V 0.47U PPS -15V U31 MDG444 IN 9 3 V- 13 220_OHM 1B3 V+ DCI/ACI* V- 4 IFBCK IN U31 MDG444 1 +15V IFBCK 6C6 -15V V+ VLF* 13 4 13 IN +15V 1K 5% V- 3D5 6D6 U33 MDG444 16 13 +7.5V V+ V+ 9 11 L27 R14 10 1 7 2 16.5K V- L9 220_OHM 2C3 -15V IDAC OUT IN 6 220_OHM 3 4 1K 5% U9 4 LTC1050 L8 220_OHM R170 2 U33 MDG444 TP9 P106 L22 I_ACDC 3 C19 I_ACDC 220_OHM V4 -7.5V -15V +15V 13 U31 MDG444 V+ 8 6 7 CURRENT ERROR OUT V- OUT 1C3 4 B B -15V TP10 +15V 8 5 Z6 7 7 4 6 Z6 13 12 2.00K 4 10 +15V 2.00K U14 AD823 Z6 5 Z6 6 2.00K 11 2.00K C34 R13 L3 0.1U 150K 220_OHM 3 Z6 2.00K +15V C62 5520A-8107 -15V +15V 8 14 0.15U Z6 PPS 9 L6 1 3 4 U14 AD823 BAS70-04 7 2 6 3 -15V 15 Z6 2.00K 2 1 Z6 4 R15 150K C35 0.15U 100P 4 -15V 1 L2 S U84 4 TL062 220_OHM C38 100P R33 150K S -15V S U37 OP07 C59 0.15U 16 -15V 2.00K 1 C67 PPS 8 220_OHM 3 +15V CR1 U3 AD706 2 2 2.00K 8 2 8 3 PE S 57LFC-1006 (4 of 8) S 5D7 3D6 3A7 3A5 2A4 IN S1 COMMON A 8 7 6 5 4 3 A 2 Figure 6-4. A6 Digital Synthesis PCA (cont) 6-21 57LFC Service Manual 8 7 6 5 4 3 2 1 C66 IG_DATA<7..0> 0.1U PE 8A6 8B7 8C3 8D6 D 2B6 2C3 2D3 IN GAIN 10* IN V+ 16 CR16 MMBD1501 P106 SMUX L21 R153 C21 V+ 2A4 3A5 3A7 3D6 4A7 IN S1 COMMON 6 5 2K 5% 220_OHM 7 4 CR17 1 2 16 15 9 10 8 7 IN SMUX U82 MDG444 R39 C65 0.0047U R26 14 25 22 4 3 -15V 14 +15V R44 10K 21 19 17 16 C19 0.1U 5% 1 B1 6 R136 3 1.33K 2 C131 0.0018U 4 -15V U10 AD620B S 18 R27 5.11K PE MMBD1501 C L20 PMUX A21 220_OHM 5A7 3B1 IN V+ 3 R152 2 2K 5% 1 CR19 2C3 1D4 IN 2D3 IN MMBD1501 IDAC X2 0 VDAC X2 1 2 16 15 9 10 8 7 AD_CS* IN 8D6 IG_RD* IN 8A6 8C2 IN 8B7 8C2 IN 6D6 IG_WR* U30 MAX135C S V+ GAIN 25M* 9 10 V- S PMUX 1 2 3 15 13 U82 MDG444 +15V CR18 7 6 5 4 3 2 1 0 A/D CONVERTER C64 0.1U SNS_LO 13 14 20 +15V 11 IN DGND D 13 12 11 10 9 8 7 6 205K -15V S CS RD WR EOC -5V R34 6 REF 5 V4 B2 8 -15V 3C8 REFINLO INHI VAGND TP3 7 V+ 24 CREF+ CREFV+ OSC1 D7 OSC2 D6 D5 BUFOUT D4 D3 INTOUT D2 INTIN D1 REF+ D0 TP5 11 V- +15V 27 402K 26 PP 5.11K V- U29 MDG444 MMBD1501 3D5 4C5 32.8KHZ 4 15 13 28 5 Y1 R18 115K 13 6D6 23 +5V +15V +15V 1C5 6D8 8A7 8B2 +7VREF IN AD_MUX<7..0> +15V BI -15V INSTRUMENTATION AMP R140 3 S 4 TP4 U22 MDG444 C 1.33K 14 C129 0.0018U 11 6 S V4 -15V -15V DIAGNOSTICS/CAL MUX P106 8D4 IN 8B7 IN 8B7 IN SRC* C6 SRC* SHORT* A5 SHORT* OTD* C5 OTD* +15V U13 3A8 3C1 IN R92 3 10K 5% 2 V3_3 8 AD706 TC_SRC 1 4 B R87 1.00M TC_SRC R89 -15V B 1.00M L25 +15V 220_OHM 8 6 R91 5 20K 5% U6 4 AD706 7 +15V C16 TC_COMP A15 TC_COMP TC_LO A14 TC_LO TC_HI C14 TC_HI A16 TC_ISO C15 TC_ISO_SRC S R88 1.00M -15V 13 V+ 8B3 IN TC_MEAS* 8 7 U82 MDG444 2A4 IN 6 L23 TC_ISO V- 220_OHM 4 L24 TC_ISO_SRC -15V 220_OHM +15V 8 U6 +15V 3 13 2 AD706 1 8B3 3B1 5C7 OUT IN ISO_MEAS* 1 PMUX V+ 2 +15V U82 MDG444 3 U13 AD706 4 8 5 -15V 7 6 V- A 4 4 R108 499K -15V -15V R127 499K A U97 4040 2.5V 57LFC-1006 (5 of 8) R126 24.9K TEMPERATURE SOURCING/SENSING 8 7 6 5 -15V 4 3 2 Figure 6-4. A6 Digital Synthesis PCA (cont) 6-22 Schematic Diagrams 8 D 7 1C5 5D3 8A7 8B2 BI 6 GAIN 10* GAIN 25M* 74HC374 7 6 5 4 3 2 1 0 IN REG_WR<2> 18 17 14 13 8 7 4 3 D7 D6 D5 D4 D3 D2 D1 D0 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 ZCAL* 19 16 15 12 9 6 5 2 FAULT_CLR VLF* 2 1 0 OUT 5D6 OUT 5C3 OUT 3B2 OUT 7B5 CM COMP<2..0> OUT 3D5 4C5 OUT 7 6 5 4 3 2 1 0 REG_WR<1> 18 17 14 13 8 7 4 3 D7 D6 D5 D4 D3 D2 D1 D0 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 19 16 15 12 9 6 5 2 3 2 1 0 DCV/ACV* U83 3C7 LOOP POLARITY OUT 3D4 Z MULT* OUT 3C7 OUT 3B8 OE 18 17 14 13 8 7 4 3 D7 D6 D5 D4 D3 D2 D1 D0 OUT 3B8 OUT 3B8 OUT 3B8 OUT 4C5 DCI/ACI* OUT 4C3 ILOOP DIAG* OUT 4C5 VLOOP DIAG* OUT 3D5 U11 7 6 5 4 3 2 1 0 REG_WR<0> Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 74HC374 DC_COUPLE* 19 16 15 12 9 6 5 2 KV ENABLE* LOCAL_AC_FB* LOCAL FB* 1 OE C9 0.1U C92 0.1U C93 0.1U C102 0.1U U95 U54 U7 U11 U8 +7.5V U45 U33 U50 + C42 10U 25V S C15 0.1U + C43 10U C3 0.1U C6 0.1U 25V U10 -15V C7 0.1U C8 0.1U C24 0.1U C20 0.1U C1 0.1U U25 U35 U90 C81 0.1U C13 0.1U U36 U58 C27 0.1U C44 0.1U U38 C110 0.1U C25 0.1U U46 C112 0.1U C115 0.1U U39 C114 0.1U C119 0.1U C116 0.1U C111 0.1U U37 U21 U41 C120 0.1U C121 0.1U U40 C122 0.1U C117 0.1U U14 C16 0.1U C12 0.1U U28 681 C123 7.5V 0.1U 5% C118 0.1U C108 0.1U U42 R156 C113 7.5V 0.1U 5% R157 U87 681 VR2 5236 VR1 5236 C124 0.1U C101 0.1U VR2 VR1 C146 0.1U C147 0.1U U60 -7.5V C 10KHZ_LPF* 11 C5 0.1U D A17 C17 A22 C22 A24 C23 A4 C4 3D4 3D3 LV ENABLE* 1 OUT OUT 11 C IN 1 +15V C2 A2 OE V FB SEL<3..0> C2 0.1U 25V A3 C3 A9 C9 74HC374 8D6 2 D + C41 10U U7 IN 3 +5V P106 11 1 8A3 4 IG_DATA<7..0> U8 8A7 5 6 1D4 OUT R112 DS1 2K 5% RED D R163 1K 5% D 2 1 2 1 K9 U83 U64 B 8A6 IN RELAY_WR<1> 11 3 2 1 0 74ACT14 10 6 5 4 3 1 2 IN OUT IN OUT CLR STB OE COM 14 8 UCN5800L 9 10 11 12 2 1 K6 2 1 2 K8 1 K7 2 1 K3 2 1 K2 K1 RST SET RST SET RST SET RST SET RST SET RST SET RST SET 15 16 15 16 15 16 15 16 15 16 15 16 15 16 B U54 U64 8D6 IN RELAY_WR<0> 3 7 6 5 4 74ACT14 4 6 5 4 3 1 2 IN OUT IN OUT CLR STB OE COM 14 8 UCN5800L 9 10 11 12 U95 3 2 1 0 7B7 IN CLR_DRVR 6 5 4 3 1 2 IN OUT IN OUT CLR STB OE COM 14 8 UCN5800L 9 10 11 12 CR3 CR2 BAV74 BAV74 R164 1K 5% A P206 D C30 A30 C29 A29 +5RLH 57LFC-1006 (6 of 8) + C54 10U 25V 7A7 IN RLY_RST* A D 8 7 6 5 4 3 2 Figure 6-4. A6 Digital Synthesis PCA (cont) 6-23 57LFC Service Manual 8 7 6 5 4 3 2 1 +15V R118 150K R111 10K 5% +15V R109 D 8 R113 499 CR11 BAT54A +15V 7 5 4 -15V PE-65728T 4 A2 C100 13 CLIN_A 5 7 R94 0.01U A1 SPARES U66 LM358 D T1 P206 CLIN_B D 2 U65 6 51.1 3 12 +15V DS8923A 8 9 U61 4 LT1360 + - 10 DDS_SYNC_IN U65 OUT 2 3 D R99 U66 4 LM358 PE-65728T A4 1 A3 CLOUT_A C109 R102 0.01U 499 16 2 8A6 IN DDS_CLK_OUT IN 1B8 1D8 8A3 16 DS8923A + 1 15 - EXT_CLK OUT 8D4 U65 DS8923A + 2 D - 1 D 3 C 7 D -15V R204 T1 22.1 PE-65728T 805 C133 PE-65728T C2 8 U19 R103 10 UXC 8D6 IN R97 51.1 9 74HCU04 6 5 499 0.01U SER_CLK_B 12 4 U87 4 TL062 S 11 7 8 T2 C1 13 4 +15V 5 D 6 SER_CLK_A 14 U65 R96 51.1 15 D - -15V DDS_SYNC_OUT 301 T1 + 2 1 -15V D DS8923A 8 8B7 5 D CLOUT_B D 6 100K C140 0.01U 7 10 8 9 C S D D 6 R202 T2 PE-65728T A5 FIG_A 1 22.1 805 C136 R106 16 C5 FIG_B 2 TX 8A7 IN 51.1 330P 15 +15V D 6 C4 TIG_B R203 T2 22.1 PE-65728T 805 4 C3 9 U62 LT1360 7 0.1U D 13 5 V+ C157 U64 2 3 51.1 12 C139 6 R95 TIG_A 13 +15V 4 D 13 U64 74ACT14 12 1 74ACT14 2 R201 OUT V- 8A7 8D4 4 805 R117 -15V 0.1U D -15V 499 D +15V 13 R110 V+ 20K 5% B 16 15 CLR_DRVR OUT 6A8 IN 8A6 IN 6D6 OUT 8A3 FAULT_CLR A24 74AC00 IG_FAULT* 1 B V4 -15V +5V U16 U24 MDG444 14 S WD_RESET* P206 CLR_DRVR U24 MDG444 11 S RX 22.1 330P C158 10 3 2 U16 74AC00 +15V 4 6 5 +5V TP15 R132 10K 5% R115 2K U16 U16 5% 9 U64 74AC00 8 FAULT* C23 10 FAULT* R120 5 74ACT14 6 12 Q6 IRFR120 U64 74AC00 11 9 74ACT14 8 13 S R105 +5V Q7 MMBT3904 10K 5% 10K 5% C142 0.1U IN D + C105 + C106 + 10U 10U D 25V 3B4 25V C107 10U 25V C79 0.1U U16 D C91 0.1U U64 D RLY_RST* A RLY_RST* 8 OUT 6A6 57LFC-1006 (7 of 8) A23 7 6 5 4 3 2 Figure 6-4. A6 Digital Synthesis PCA (cont) 6-24 A Schematic Diagrams 8 7 6 5 4 3 2 6 U12 OUT 2 DCLK CASC 6 1 +5V +5V C83 0.1U R133 R125 1K R128 1K 5% 5% 5% 5% D U2 P1 EPC1-PROG DCLK 1 2 3 4 5 6 7 8 9 10 D 4 DCLK CASC 9 8 CS OE DATA OUT 7C6 OUT 5D3 OUT 6C8 OUT 12 2 6B8 OUT AD_MUX<7..0> OFF EN* UXC SCALER_OUT<11..0> REG_WR<0> EXT_CLK RELAY_WR<0> DDS_CLK_IN RX DATA0 EPC1 1D4 OUT SRC* AD_CS* 0 R124 1K DAC_CS<1> 5D8 8B7 8A6 8C3 4 6 R123 1K 499 0 FOR U2 PRI_CHANGED OUT 5B5 OUT 8B2 8B7 1C8 IN 7C5 IN 8A3 IN 7B5 8A7 8A6 8C7 IN CONF_DONE 4 8B7 8D7 IN NSTATUS CS OE 3 DATA 6 1 +5V +5V +5V C141 0.1U C85 0.1U FOR U12 R122 2K D C86 0.1U C87 0.1U OUT NSTATUS 8B3 8B7 OUT 8B7 8D3 DS2 R165 1K 3 OUT CONF_DONE OUT 8 4 SEC_STROBE 5% 2 C10 0.1U D C11 0.1U 1 17 OUT PRI_STROBE P<4> 1D3 OUT 1C8 D D RAM_OE* RAM_WR* 8C3 IN IN 1B3 OUT 9 5 6 P<5> 7 8 8C3 5D8 8D6 8C3 8A6 AD_MUX<7..0> OUT 1 8C2 5D3 OUT IG_WR* 5B5 OUT SHORT* 5B5 OUT 1D4 1C5 B OUT 9 OTD* LF/HF* OUT 7 3 DAC_CS<0>* 4 5 1 OUT IG_ADDR<2> 8B2 0 8 8 SCALER_OUT<11..0> 7D5 IN 8D7 8B3 IN OUT 1B8 OUT 1C5 8B2 6D8 5D3 6 NCONFIG NSTATUS IN PRI_CH<15..0> 8D3 8D7 1D8 9 10 DDS_SYNC_IN D SEC_CH<15..0> BI 2 1 15 1 12 6 5 15 14 U5 EPF10K30RC240 IG_DATA<7..0> 6D8 OUT 7C6 OUT IN 2B8 8B8 4D5 +5V IN IG_CS<7..0>* BUS_CS<7..0> P206 D 12 11 12 RAM_OE* 2 16 5D8 8A6 8B7 8D6 AD_MUX<7..0> OUT REG_OUT<15..8> P<0> OUT 2D6 6 2 7 NP<1> OUT 2C6 OUT 2B6 OUT 2C6 OUT 1D4 TC_MEAS* OUT 5B6 ISO_MEAS* OUT 5A6 P<3> 5 P<1> 13 HF/LF* 5D3 8A6 IN 5D3 8B7 IN IG_RD* RD IG_WR* WR A20 C20 1C5 8B7 IN IG_ADDR<2..0> AOUT<2..0> 0 1 5 4 +5V A26 A27 6 C27 7 7 -5V 5 11 6 5 4 3 1 SCALER_OUT<11..0> NCONFIG OUT 1C8 8B7 8D4 1C5 5D3 6D8 8A7 8D7 8B7 OUT BI DGND TP8 IG_FAULT* IN OUT 7B5 2B8 5% 7B5 7D6 GND OUT OUT 0 1 13 RELAY_WR<1> DDS_SYNC_OUT 0 6B8 7 WD_RESET* OUT CR9 +5V U67 7 BAT54A 13 R93 2K 5% 0 R130 2K 6 7B5 8D4 4 RESET S1 IN 3 MR RX 11 8 5 2 6 WDO PFO IG_CS<7..0>* D NP<0> 3 A WDI D 15 4 1 PFI 5 4 3 5D8 8D6 8C3 8B7 RESET* OUT AD_MUX<7..0> D D CONF_DONE IN 8C7 8D3 5D3 8C2 OUT BAT54A 3A6 7 IG_RD* OUT 8C2 OUT 2D6 REG_WR<1> OUT 6C8 DDS_CLK_IN OUT 8D4 DDS_CLK_OUT C80 0.1U SH 14 10.0MHZ 1.5PPM VCC OUT 8 T-1100 GND SH SH1 7 INT_CLK 57LFC-1006 (8 of 8) SH2 A D OUT 1B8 1D8 7C6 INT_CLK CR10 8 A6 C6 A11 C11 A14 C14 A19 C19 A22 C22 A25 C25 C26 A28 C28 A31 C31 IG_DATA<7..0> DB7-DB0 D +5V B +5V 8 VCC C10 A10 C9 A9 C8 A8 C7 A7 7 6 5 4 3 2 1 0 4 2 14 +5V A13 C12 A12 2 1 0 10 NPCLK 10 U71 MAX705 C 8C8 OUT +5V 2 C18 A18 C17 A17 C16 A16 C15 A15 7 6 5 4 3 2 1 0 REG_WR<2> TX 2D6 8A3 8C2 180 179 178 177 176 175 174 173 172 171 170 169 168 167 166 165 164 163 162 161 160 159 158 157 156 155 154 153 152 151 150 149 148 147 146 145 144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 0 14 OUT TCK CONF_DONE CEO TDO VCCINT I/O6 I/O7 I/O8 I/O9 GNDINT CLKUSR I/O12 I/O13 I/O14 I/O15 VCCINT I/O17 I/O18 I/O19 I/O20 I/O21 GNDINT RDY/BSY I/O24 I/O25 INIT_DONE VCCINT I/O28 I/O29 I/O30 I/O31 GNDINT I/O33 I/O34 I/O35 I/O36 VCCINT I/O38 I/O39 I/O40 I/O41 GNDINT I/O43 I/O44 I/O45 I/O46 VCCINT I/O48 I/O49 I/O50 I/O51 GNDINT I/O53 I/O54 I/O55 I/O56 VCCINT TMS TRST STATUS DATA0 DCLK CE TDI GNDINT I/O175 I/O174 I/O173 I/O172 I/O171 VCCINT I/O169 I/O168 I/O167 I/O166 GNDINT I/O164 I/O163 I/O162 I/O161 VCCINT I/O159 I/O158 I/O157 I/O156 GNDINT I/O154 I/O153 I/O152 I/O151 VCCINT I/O149 I/O148 I/O147 I/O146 GNDINT I/O144 I/O143 I/O142 I/O141 VCCINT I/O139 I/O138 I/O137 I/O136 GNDINT I/O134 I/O133 I/O132 I/O131 VCCINT I/O129 I/O128 I/O127 I/O126 GNDINT MSEL0 MSEL1 VCCINT CONFIG 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 1C8 8D4 8B2 2 9 +5V 7 1C8 D D CS CS WS I/O237 RS I/O235 I/O234 I/O233 GNDINT I/O231 I/O230 I/O229 I/O228 I/O227 I/O226 I/O225 VCCINT I/O223 I/O222 I/O221 I/O220 I/O219 I/O218 I/O217 GNDINT I/O215 I/O214 DEV_OE DED-IN DED-CLK DED-IN DEV_CLR I/O208 I/O207 I/O206 VCCINT I/O204 I/O203 I/O202 I/O201 I/O200 I/O199 I/O198 GNDINT I/O196 I/O195 I/O194 I/O193 I/O192 I/O191 DATA7 VCCINT DATA6 I/O187 DATA5 DATA4 I/O184 DATA3 DATA2 DATA1 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 12 13 +5V SEC_XING_STROBE 240 239 238 237 236 235 234 233 232 231 230 229 228 227 226 225 224 223 222 221 220 219 218 217 216 215 214 213 212 211 210 209 208 207 206 205 204 203 202 201 200 199 198 197 196 195 194 193 192 191 190 189 188 187 186 185 184 183 182 181 3 8A6 8C7 8D3 +5V 9 7 11 WE CE OE UB LB 18 10 2 11 14 6 10 4 3 15 9 12 13 7 5 1 0 8 11 17 6 41 40 39 7 8 9 10 13 14 15 16 29 30 31 32 35 36 37 38 IO0 IO1 IO2 IO3 IO4 IO5 IO6 IO7 IO8 IO9 IO10 IO11 IO12 IO13 IO14 IO15 2 C A0 A1 A2 A3 A4 A5 A6 A7 A8 A9 A10 A11 A12 A13 A14 A15 A16 A17 WTDATA<15..0> P<2> OUT PCLK OUT RAM_WR* OUT +5V I/O61 I/O62 I/O63 I/O64 I/O65 I/O66 I/O67 I/O68 GNDINT I/O70 I/O71 I/O72 I/O73 I/O74 I/O75 I/O76 VCCINT I/O78 I/O79 I/O80 I/O81 I/O82 I/O83 I/O84 GNDINT I/O86 I/O87 I/O88 VCCINT DED-IN DED-CLK DED-IN GNDINT I/O94 I/O95 VCCINT I/O97 I/O98 I/O99 I/O100 I/O101 I/O102 I/O103 GNDINT I/O105 I/O106 I/O107 I/O108 I/O109 I/O110 I/O111 VCCINT I/O113 I/O114 I/O115 I/O116 I/O117 I/O118 I/O119 I/O120 1 2 3 4 5 18 19 20 21 22 23 24 25 26 27 42 43 44 0 3 14 6 WTADDR<18..0> 15 5 6 13 17 16 2 11 14 12 9 18 10 1 3 7 8 4 C104 0.1U IG_CS<7..0>* RED U1 7C4098 C99 0.1U RX_ERR* 1 3 R116 2K 5% OUT 10 15 D C96 0.1U D RED +5V C90 0.1U BYPASSES FOR U5 DS3 CONF_DONE NCONFIG C89 0.1U 5% PRI_XING_STROBE IN 6 5 4 3 2 Figure 6-4. A6 Digital Synthesis PCA (cont) 6-25 57LFC Service Manual 57LFC-7607 Figure 6-5. A7 Current PCA 6-26 Schematic Diagrams 8 6 7 5 3 4 6 1 +15I 100P 2.00K CR1 R21 5 1.00K +15I 7 3 +15V 10.0K S 2 IN 4C6> COMP3 IN 4C6> 4 COMP4 13 IN 1A6< 4C6> IN 1A6< 4C6> IN 1A6< 4C6> IN U48 LT1150 VIKING-4R05T-H 7 5 6 2K 6 5K C132 8 TP1 +5 +15V 10P +15V 4C6> IFBCK TP2 IFBCK IN STBY A20 4D6> CAL_OS* IN U25 DG444 VL U52 LT1150 VDD 2 3 6 7 ISUP V+ - 2 CKOUT 1 8 3 14 V- + 4 CKIN 5 11 S SGND 100 U53 5K 2K LT1150 8 U27 6 8 10 11 +15V IN IN 1 7 ISUP V+ - 2 3 V- + 4 CKIN 5 6 A -15V D IN 2.2A_ENABLE* A22 1B6< 4C6> 2 8 VIKING-4R05T-H Z4 1 PMUX 4 V- 4 CKIN C17 5 3.3P -15V 2 1B6< 4C6> 4D5> 3B6< R107 1M 1 2 16 15 9 10 8 7 MP2_TEMP MP3_TEMP 1C6< 4C6> 4 R19 3 1.00K R20 2 R28 3 SMUX OUT 14 11 1.00K R52 1.00K R155 6 1.00K Q41 10 9 6 5 +15I2 U32 MC34081 6 1 Z2 Z2 Z2 400 40 4.0 1 +5V SHUNT SENSE LO W1 2 C34 AQV225 IN SHUNT_SEL2 IN SHUNT_SEL3 B 6.98K -15I2 2 2 R143 7 8 3 2 4 3 R37 3 U35 OP284 1 R46 Q20 MMBT3904 100 2 CR14 MMBD1503 2 6.04K IGND IGND -15I2 +15V 1 2 16 15 9 10 8 7 1000P 4 CR10 1 IN SHUNT_SEL0 IN SHUNT_SEL1 C40 2 R159 100P 3D8<> 6 10.0K +15I2 11 12 IGND JUMPER LOCURR_OUT BI S 5 Q16 MMBT3904 R87 2 100 DN2535N3 1 R33 100 2.61K -15V R7 MMBD1503 2 R1 .1 0.1% S U34 2.2M 4 Q42 DN2535N3 K12 C39 -15I2 7 8 330P 9 R146 R47 1.8K 110 TP5 U28 DG444 BOARD SHIELD 3 2 14 R198 R148 2 511 MP7 2MA R44 110 6.64MA 511 11 6 -15I2 S V- 2_2A GUARD 5 8K GND VSS 24K 3 CKOUT 16 1B6< 4C6> 1 7 ISUP V+ + 3 LO_CURR_ENABLE 4 LT1150 15 14 BI DG444 U10 V+ U33 ADG431 IN 3C8<> HI_CURR_RTN -15V 9 -15V 4D5> V+ CKOUT Z4 VIKING-4R05T-H MMBD1503 4 JUMPER +15V S 10 R4 1 SHUNT_SEL4 IN CR15 Q19 MMBT3906 C105 R10 6.04K 6 V- 8 6 V- 4D6> K12 0.1U -15V W7 2 3 3 -15V 7 6 4 4C6> 12 13 V+ 1 2 16 15 9 10 8 7 IN SGND MP2_TEMP_MON* 2B2> MP3_TEMP_MON* 2B1> 1 9 13 +15V IN 110 2 -15I2 13 I_ACDC V- + 4 CKIN 5 R48 4 3 2.00K 7 U35 OP284 5 11 +15V -15V C131 4C6> C20 GM=214UA/V, 2MA/V 3C8<> 14 SHUNT SENSE HI 1 7 ISUP V+ - 2 10P 4D5> IN SHUNT_SEL0 6 3C8<> V- Z4 2.2A_ENABLE SHUNT_SEL1 2 3 +15V CKOUT B SHUNT_SEL2 9 4 U23 DG444 1 2 16 15 9 10 8 7 R147 1.00K 1.00K C38 330P R45 +15I2 LOCURR_RTN BI MID_CURR_RTN 3 BI 8 R165 10.0K R145 K5 7 V+ SHUNT_SEL3 1A6< 4C6> 13 10.0K -15V A21 RCOM1 2C8<> +15V 4C6> 4 R176 3 C +15I2 4 7 P107 2 10.0 1 R43 +15V R173 6 6.98K U29 MC34081 R51 R49 R41 1.00K 10.0K RCOM1 TP3 8 BI R175 R3 2 100 -15V 1.00K IGND 4 -15I 4D6> IN 3 8 V- IN COMP2 316 1.00K MMBT3906 S HICURRENT_AMP_IN STBY* Q6 121 IGND -15I2 K2 R39 R32 13.0K 2 R35 4 6 R15 -15I 2 10.0K 0.0022U 8 0.0047U 11 0.033U 3 3 R154 HEATSINK C33 4 C135 14 2 9 4 -15I 2.0MA C7 8 MP14 MJE15028 CR11 1 2 16 15 9 10 8 7 9 4 5 Q15 MMBT3904 R88 S V+ 3 -15I2 7 Q3 7 U26 DG444 C -15V K1 R22 7 100 U58 AD823 MMBT3906 2.00K 6 IGND 7 8 CR2 MMBD1503 4.32K 13 +15V -15I2 +15I2 U44 R164 5 AD823 R133 7 10.0K 6 10.0K S R186 301 4 0.0022U 100P +15I K10 4 270 5237 5% 8.2V C31 10P R14 8 5237 5% 8.2V S R11 R124 3 10.0K 2 4 CR12 R82 C29 1000P S VR5 4.99K S 4.99K VR1 TP7 0.0039U R102 +15I 10.0K U31 LT1630 3 R31 1 2 100 1.00K C2 4D5> IN C110 R17 10.0K 4 C25 R2 +15I2 U13 MC34081 6 MID_CURR_ENABLE AQV225 1.00K 4 10U -15V C117 2 MID_CURRENT_OUT BI 3D8<> GM=27MA/V,242MA/V R27 4 10.0K +15I2 U44 AD823 3 1 2 10.0K 7 100 U31 LT1630 R26 10.0K -15I +5V U30 R25 R86 1.00K R81 +15V 4 R163 R18 2 R156 2.2M 2 8 U18 OP27G 6 R84 -15I R13 7 3 8 7 I_ACDC_SW HEATSINK Q14 MMBT3906 1 R134 D MP13 MJE15029 5 IGND ERROR_OUT TP6 10U 9 0.0022U 6 4 C51 8 R36 R30 2 ISOLATION BARRIER IDAC_SW TP4 R83 U7 MC34081 6 2.00K 6 IGND DISTORTION LOOP ERROR AMPLIFIER +15I MMBD1503 2.00K -15I R53 1 7 316 C32 8 C30 4 R12 K2 1.00K R85 100 R29 4 8 2 10.0 100 Q5 MMBT3904 R16 U58 AD823 1 3 D R50 R40 +15I 13.0K 1.00K ALL RESISTANCES ARE IN OHMS. Q7 MMBT3904 121 R6 2.00K 1. (5B4) R23 OTHERWISE SPECIFIED. 2.00K NOTES:UNLESS RCOM1 A -15V 57LFC-1007 (1 of 5) RCOM1 DIFFERENTIAL SHUNT AMPLIFIER 8 7 6 5 4 3 2 Figure 6-5. A7 Current PCA (cont) 6-27 57LFC Service Manual GM=7.9A/V AC,2.38A/V DC<1A,1.19A/V DC>1A W15 2 1 +MONGO BI 5A6<> JUMPER C52 4.7U Q11 R74 R79 R61 47.5 0.060 0.5W 110 MMBT3904 K22 IGND 4 R34 3 2 0.060 0.5W R55 CR16 GF1B 4.02K R59 100 CR4 3 MMBD1503 C47 +15I MP2 MJE15029 1 8 560P 2 6 +15I R91 4.02K 4 R68 1.00M R65 8 U59 AD823 1 3 R72 2 100 R66 0.1U Q9 MMBT3904 C36 4 2.00K HEATSINK Q1 CENU56 1.00K C19 -15I +15I 13.0K R140 7 U37 LT1630 5 100P CR3 MMBD1503 -15I R71 IGND 1.00K +15I R89 2.00K 7 U17 MC34081 6 3 R137 R75 10.0K 2.00K 2 4 2.2A_OUT IGND R69 10.0K R90 2.00K C35 10.0K R76 6 1 2.00K 5 R95 IN 2 4 698 10P R70 2.2A_ENABLE AQV225 0.47U R54 CR5 100P +15I R58 6 5 -15I 7 U59 AD823 R73 R207 R208 49.9 49.9 T1 +VS Q4 MMBT3906 100 C134 MP2 LM35 C11 +15I -15I R67 R92 3 1.00M 4.02K 2 U37 LT1630 1 R57 2 1 MMBD1503 R60 560P MP3_TEMP T2 OUT VO LM35 GND T3 1B6< R106 2.00K S 3 HEATSINK 100 R118 CR18 TEMPERATURE SENSING CIRCUITRY GF1B 7 R24 8 9 Q12 MP3 0.1U MP3 MJE15028 4.02K MMBT3906 R5 2.00K 1B6< Q8 CENU06 CR7 C48 OUT C133 0.1U 1.00K -15I K22 GND T3 IGND T1 +VS MP2_TEMP T2 VO 0.1U 8 R64 13.0K 10.0K MMBD1503 4 2.00K +15V C49 1.00K C37 IGND 3D8<> U38 8 BI 4 1C4<> BI +5V -15I R56 HICURRENT_AMP_IN 0.060 0.5W R77 110 R78 47.5 R62 C53 0.060 0.5W 4.7U IGND W14 2 1 -MONGO BI 5A6<> JUMPER 57LFC-1007 (2 of 5) 6-28 Figure 6-5. A7 Current PCA (cont) Schematic Diagrams 6 OUT_HI TP8 P107 BI BI MID_CURRENT_OUT DEF DIP16 5VDC 5 2C4<> 2.2A_OUT C41 K19 5RST 8 1B1<> BI LOCURR_OUT 9 4 10 3 12RST 2 1C4<> BI MID_CURR_RTN 9 11RST 1C4<> BI LOCURR_RTN 8 6RST RST K17 14 DS4E RST K13 14 DS4E C24 S 33P K13 13 DS4E K18 5 R101 3 3 4.02K 2 4 K13 4 DS4E R114 5 4.02K 6 LF412A U16 1 OUT_HI 5 C32 A32 C31 A31 10 12 S +15V 8 K14 7 33P K13 3 DS4E HIGUARD C29 A29 U16 LF412A R116 7 100 K21 IGUARD 7 8 9 4 3 4 7 8 1D2<> 7 K17 3 DS4E 2 TQ2E -15V TX2A K18 8 9 E2 10 90V CR25 GF1B GF1B R104 49.9 9 K17 13 DS4E RST K17 4 DS4E RST OUT_LO C27 A27 C26 A26 RCOM2 C21 SMUX C22 11 8 6 1N5908 6V 10% CR17 DB101S VR3 1N5908 6V 10% 12 R99 CR24 VR4 49.9K 49.9K R98 TX2A K19 R209 TP9 1.00K 9 OUT_LO 1B4<> HI_CURR_RTN BI +15V 13 R9 V+ 4C6> IN LOW_CURRENTS_MONITOR* 1A7< 4D5> 4C6> COMPLIANCE_VOLTAGE IN 1 2 16 2.2A_ENABLE* IN 15 COMPLIANCE_MONITOR* 9 10 8 +5V 7 R115 2.2M U47 DG444 3 9 K20 8 7 2 3 4 TQ2E 14 PMUX 11 BI 6 V- TP12 RT2 4 10.0K RECTIFIER TP10 33U R172 10.0K +15V +15V 2 1 SOFT_START* IN R105 S 511 10.0K 5 3 4 U21 AD823 S 4D4> U21 AD823 7 R197 8 10.0K R171 10.0K 8 R166 RECTIFIER 3.00 25% 6 S 4 R169 10.0K C58 -15V S C57 PEAK TP11 10U VR2 U45 5231 5% 5.1V +15I 8 D R97 1 JUMPER U19 TL062 49.9K C55 JUMPER S 10U U20 8 R93 10.0K 6 7 49.9K C56 1U A11 C11 IGND 4 S U19 TL062 S -15V 57LFC-1007 (3 of 5) +15V 7 5 -15I IGND R100 4.99K IGND I_SHLD 5 LM393DT 6 R96 1 JUMPER C59 +15I IGND 1 2 10.0K 8 -IREF W6 2 200K 10.0K -IREF R108 3 3 R103 4.99K 8 U20 4 LM393DT 1 10.0K C7 TLP124 2 -15I 1U I_SHLD W22 R170 +15V R117 2 PEAK R193 10.0K R120 +IREF 3 2.61K 4 A7 4 2 4 P107 1 1 +IREF W5 +15I R63 2 S -15V S Figure 6-5. A7 Current PCA (cont) 6-29 57LFC Service Manual 74ACT175 4 1D 5 2D 12 3D 13 4D 1 9 CLR CLK 1Q 1QN 2Q 2QN 3Q 3QN 4Q 4QN 2 3 7 6 10 11 15 14 STBY* STBY SHUNT_SEL4 OUT 1C6< OUT 1B8< OUT 1B6< +5V U24 220MA_COMP* 7 6 5 4 3 2 1 0 OUT 74ACT175 U1 74AC04 11 10 4 1D 5 2D 12 3D 13 4D 1 9 CLR CLK 1Q 1QN 2Q 2QN 3Q 3QN 4Q 4QN 2 3 7 6 10 11 15 14 U4 R38 698 R42 698 R80 R121 10.0K 2.2A_ENABLE OUT 1B7< 2.2A_ENABLE* OUT 1A7< 3B6< MID_CURR_ENABLE OUT 1D3< LO_CURR_ENABLE OUT 1B3< +5V C44 10U R8 D7 D6 D5 D4 D3 D2 D1 D0 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 11 1 19 16 15 12 9 6 5 2 COMPLIANCE_MONITOR* MP3_TEMP_MON* MP2_TEMP_MON* CAL_OS* OUT 3B6< OUT OUT OUT OUT 3B6< 1B6< 1B6< 1A8< CR9 +5RLH D 1 10 2 74HC374 1 K22 K13 OE D7 D6 D5 D4 D3 D2 D1 D0 11 1 3B8< OUT MMBD1503 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 19 16 15 12 9 6 5 2 SHUNT_SEL3 SHUNT_SEL2 SHUNT_SEL1 SHUNT_SEL0 COMP4 COMP3 COMP2 OUT OUT OUT OUT OUT OUT OUT 1A6< 1A6< 1A6< 1A6< 1C6< 1C6< 1C6< 7 6 5 4 1C6< 1B6< 1B6< 1B6< 6 5 4 3 1 2 74HC374 IN OUT IN OUT CLR STB OE COM 14 18 17 14 13 8 7 4 3 SOFT_START* 200K LOW_CURRENTS_MONITOR* U3 7 6 5 4 3 2 1 0 12 74AC04 OE 3 2 1 0 U1 9 6 5 4 3 1 2 8 7 6 5 4 6 5 4 3 1 2 UCN5800L IN OUT IN OUT CLR STB OE U1 5 1 2 6 74AC04 RST SET 5 TQ2E 15 16 DS4E +5RLH 1 10 9 10 11 12 10 1 RST SET RST SET RST SET 6 5 TQ2E 6 5 TQ2E 6 5 TQ2E +5RLH COM 10 8 OUT IN OUT 1 10 1 K10 9 10 11 12 1 10 K14 K1 RST SET RST SET RST SET 6 5 TQ2E 6 5 TQ2E 6 5 TQ2E 2 1 U8 UCN5800L COM 8 IN OUT IN OUT CLR STB OE K12 UCN5800L IN CLR STB OE 1 10 K5 U14 +5RLH 14 3 2 1 0 SET 6 U6 +5RLH 6 5 4 3 RST K2 14 74AC04 9 10 11 12 8 18 17 14 13 8 7 4 3 U1 13 698 U5 7 6 5 4 3 2 1 0 U1 74AC04 1 2 5VDC DIP16 DEF K19 9 10 11 12 RST SET U9 15 16 UCN5800L COM +5RLH 7 6 5 4 3 2 1 0 6 5 4 3 1 2 C20 IG_WR* 1 2 3 A B C 6 4 5 G1 G2A G2B 7 9 10 11 12 13 14 15 Y7 Y6 Y5 Y4 Y3 Y2 Y1 Y0 IG_CS3* R119 C61 4.02K CR21 IN OUT CLR STB OE 9 10 11 12 2 1 U1 3 4 6 5 4 3 1 2 RST SET RST SET 6 5 TQ2E 15 16 DS4E U11 UCN5800L +5RLH 8 IN OUT IN OUT CLR STB OE K17 COM 12 3 2 1 0 74AC04 C16 OUT 14 IG_ADDR0 IG_ADDR1 IG_ADDR2 IN 14 74HC138 +5V 1 10 +5RLH K21 7 6 5 4 U2 A12 C12 A13 8 14 IG_DATA<7..0> C10 A10 C9 A9 C8 A8 C7 A7 1 9 10 11 12 U12 UCN5800L 10 1 K18 K20 RST SET RST SET 7 6 TX2A 6 5 TQ2E CR6 CR8 MMBD1503 MMBD1503 COM 8 P207 +5RLH 56P PULLDOWN MMBD1503 D 57LFC-1007 (4 of 5) R190 1.00K A24 CLR_DRVR A23 RLY_RST* D DIGITAL CIRCUITRY Figure 6-5. A7 Current PCA (cont) 6-30 Schematic Diagrams TP15 6 +15V P107 A13 C13 C65 C73 C76 C81 C84 C87 C90 C93 C60 C23 C15 C10 10U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U C122 C124 0.1U 0.1U C120 C113 0.1U 0.1U C100 0.1U SGND TP23 A14 C14 S C67 C74 C77 C54 C88 C91 C94 C98 C5 C9 C82 C121 C123 C119 C101 10U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U C114 0.1U TP16 A15 C15 -15V TP17 +5V P207 A26 A27 C62 C70 C75 C79 C83 C86 C89 C92 C95 C97 C99 C42 C45 C46 C50 C104 C1 C21 C43 C109 10U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U A6 C6 A11 C11 A14 C14 A19 C19 A22 C22 A25 C25 C26 A28 C28 A31 C31 C27 C2 A2 CR27 CR28 MBRS140 MBRS140 DGND TP22 D TP13 U51 1 C129 D C64 C72 10U 0.1U R205 0.047U 100 C102 CR26 DB101S T1 11 2 35V 9 10 C96 CR29 C108 C111 C115 C26 C126 10U BAT54S 0.1U 0.1U 0.1U 0.1U 0.1U TP18 GND2 35V C130 2 100 U49 LF356 6 7 +5V 10U 3 U50 4 N/C TAB IN LM2290 -15V NULL 3 OUT GND -15I2 C85 150U CR30 BAT54S C107 C112 C116 C20 C125 0.1U 0.1U 0.1U 0.1U 0.1U 1 2 S 4 D -15I2 TP24 2 470U R206 0.047U C63 C103 TP14 5520A-6502 A29 C29 +15I2 TP25 +15I2 5 +5RLH A30 C30 4 N/C TAB 2940 15V 3% 3 OUT GND 2 470U 4 -5V 5AC2 5AC1 IN 2 R211 -5V 4.02K R199 I_ACDC_SW BI 1B8 +15I TP20 10.0K P107 +15I A8 C8 C68 C4 C6 C8 C12 C13 C27 10U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U IGND TP19 A9 C9 IGND C66 C3 C14 C16 C18 C22 C28 10U 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U -15I TP21 A10 C10 -15I P107 A1 A2 C1 C2 +MONGO C69 C78 100U 100U 16V 16V BI 2D3<> A3 A4 C3 C4 A5 A6 C5 C6 C71 C80 100U 100U 16V 57LFC-1007 (5 of 5) IGND 16V -MONGO BI 2A3<> Figure 6-5. A7 Current PCA (cont) 6-31 57LFC Service Manual 57LFC-7608 Figure 6-6. A8 High Voltage PCA 6-32 Schematic Diagrams 8 6 7 5 3 4 UNLESS OTHERWISE SPECIFIED ALL RESISTANCES ARE IN OHMS. ALL CAPACITANCES ARE IN FARADS. ALL RELAYS ARE SHOWN IN THE RESET POSITION. 1. 2. 3. D +15V R140 100K +15V CR32 GF1M CR14 27 R3 GF1G CR3 R4 22 R6 10 R5 BAV99 10 150 R44 R45 10K 1 2 R143 13 10 8 VMID C24 A24 9 4 6 11 R206 C2 SGND SGND C12 A12 C14 A14 C16 A16 C18 A18 C23 A23 C25 A25 R142 Q9 MMBT3904 R147 237 237 SGND 0.1U -45V R9 27 10 R146 R145 10K 10K GF1M Q34 CR15 SGND Q36 2N5551 2N5551 R207 10.0K -15V 150 V- LTC1150 CR5 BAV99 R10 CR17 6 3 22VREF R204 2N5401 5231 5% 5.1V 10.0K 1K VR25 R149 5231 5% 5.1V NOLOAD=TRUE 2N5401 U11 CR6 V+ 4 B P108 K1 F1 0.2 AMP GF1G 2 BAV99 2A8 47P BI SGND R46 11 Q6 10K RCOM1 13 MMBT3906 SGND Q56 100K A21 220VREF 13 11 MVOUT 2N5551 7 9 TP5 K1 Q12 C33 K4 9 MMBT3904 R7 SGND +15V K3 VR43 R209 1.00K BAV99 C Q3 22 -15V CR47 Q11 2N5401 BAV99 R8 NC 8 V4 R211 SGND 6 CR4 CR16 D [Q4] MP4 TIP31C HEATSINK 10 0.1U SGND B2 5 C58 R205 3 7 V+ Q10 SGND 3.32K 2 2K R210 R139 22VIN Q8 MMBT3906 SGND 2.43K 6 Q55 MMBT3906 1.00K 6 4 1 B1 2B8 0.1U BI C57 220VIN 10.0K V3_3 8 4 R138 C17 A17 8 1.00K K3 OPA637AU R144 K4 P108 R208 +15V U5 C32 13.3K 1.50K SGND -15V Q35 2N5401 SGND 47P R141 0.1U -15V C31 R234 +15V R148 0.1U 1.00K R137 C C1 4.7K Q60 MMBT3906 100K +45V 5.1V 5% 5231 R233 SGND 5.1V 5% 5231 BAV199 VR24 MMBT3904 Q59 VR23 BAV199 CR31 1 REFERENCE DESIGNATON LAST NOT USED USED C92 CR66 CR24,28,33,34,64 E9 F2 K4 L2 M1 MP14 MP1 P208 P1-107,109-207 Q67 Q1,2,4,5,7,22,25 Q27,29,33,42,44,52 Q57 R278 R13-21,31-35,47,59 R60,105,106,262 R263,266-276 RT2 S1 TP18 U28 VR59 NOTES: 6 [Q5] MP4 TIP32C HEATSINK B TP7 +45V SGND C4 A4 C6 A6 C35 10U 160V C9 SGND C13 A13 C15 A15 TP8 10U 160V -45V +15V TP9 TP10 C56 10U -15V 25V E1 C55 C8 C34 0.1U 0.1U 10U 25V 57LFC-1008 (1 of 4) SGND SGND A 8 7 6 5 4 3 A 2 Figure 6-6. A8 High Voltage PCA (cont) 6-33 57LFC Service Manual 3 CR62 SP+400 +PA GF1M CR7 R51 120K R52 120K 13 13 12 5 SGND 5 V- LF353 4 SMUX IN SGND R12 1.00K R53 HVCOM 120K R54 C22 K2 SP-200 K2 OUT_220V SP+400 6 11 5% L2 R56 8 4 SP+400 SP+400 120K R29 68K 68K R28 SP-200 SP-400 SP+400 SP-400 C69 1U VR51 C6 C25 HVCOM 3.3U 0.02U 450V 500V -PA CR63 SP-400 IN 100 R185 MJD340 MMSZ5240B 5% 10V Q16 SP-400 100 L1 0.1U R183 C70 1.00K NC SP-400 V8 4 B2 5 MJD340 6TURN Q64 6 R57 2 OP196GS 7 V+ 9 13 1.5UH R55 R27 68K 68K R26 GF1M 120K P108 SP-200 SGND TP13 HVOUT SP+400 3A1 SP-400 SGND GF1M R127 R125 57LFC-1008 (2 of 4) SP+200 100K 4 4 13 5 R265 120K 2 F2 1 SP-400 BAV99 CR59 R112 4 10.0M 7 Q63 MJD340 U16 1 B1 3 24.3K 18.2 U1 V+ -15V -15V SP-200 [Q29] SP-400 V- 0.1U SP-200 CR41 R110 68K 68K R114 12 R277 10.0M 100 100 68K R108 68K R107 6 -15V 8 6 SP-300 R236 18.2 0.1U U10 ADG413 V+ +15V 3.32K LF353 Q15 MJD340 MTP2P50E TO220HS R115 C26 5 120K R48 R50 120K R22 R24 GF1M MURS120 CR43 100 R186 5.6 R261 CR2 BAV99 15K R120 MMBT3906 VL 8 0.47U SP-400 10P DGND -15V SGND VA_I_NEG* IN 4 MP7 5231 5.1V 5% 47 R118 220 R198 MMSZ5226 5% 3.3V C27 BAV199 1 C22 MTP2P50E TO220HS R111 VR50 Q50 2N3904 SP-400 U1 V+ V- [Q2] MMSZ5240BT1 10V 5% SP-400 +15V 0.1U 0.1U CR66 3 VR17 68K Q51 2N3904 SP-400 1U SGND 8 0.1U Q28 470 R2 VR19 Q30 C91 C3 0.1U R30 10.0K 2 BAV99 R117 R136 MMSZ5240BT1 237 2.2K +15V -15V 470 10V 5% SP-400 R135 SP-400 220 VR21 -15V 100K -15V MP12 TIP32 22P 68K SP-400 3 R123 R109 2 R126 1U C68 CR27 68K BFC60 1 V- LTC1150 4 15K R122 MP8 15K 2 U4 3 15K R119 2.43K R199 MP13 MTP2P50E C92 -15V SGND TP18 0.22U HVB MURS120 C24 R113 10.0K 220VREF V+ 6 10.0K BI R203 1C7 2 SP-300 3 0.1U +5V C53 GND C47 MP3 68K +15V 7 CR44 MMSZ5240BT1 10V 5% R116 R124 0.1U R134 15U SP-200 10P SGND 1 C54 SGND SGND C48 3.32K C4 R121 SGND 1.00K MMBT3906 VR18 -15V Q53 C67 R58 10.0K 0.22U SGND LF353 4C11 V- 332 C23 VR2 R131 6 NC V8 4 B2 5 VR20 7 V+ MMSZ5240BT1 5% 10V 3 3.92K 2 2K 0.1U R132 C28 220VIN R133 BI 1.00K 1C7 SGND 5231 5% 5.1V VR41 R201 2.43K OPA637AU 5 4 C46 U2 V+ 7 R264 V- CR42 2MA PN3640 HVCOM 6 BAV199 SGND 7 MMBT3906 BAV99 1 B1 47 U2 1 432 MMSZ5245BT1 5% 15V +15V U3 MMBT3906 Q54 CR29 R200 SGND SGND Q46 R193 27.4K -15V 470P C29 30.9K 0.1U 0.1U R128 C52 8 V+ 3 V- -15V 80.1U CR65 R184 R191 R202 VR42 5231 5231 5.1V 5% 5.1V 5% 18.2K R130 C30 R129 Q32 MMBT3906 VR22 4.7K 1.00K Q31 MMBT3904 C5 LF353 R278 HVCOM +15V 11 GND +15V U10 ADG413 V+ 10 HVCOM 2 MURS120 VR16 750 R196 +15V C49 0.22U R187 VR15 22P 35V VA_I_POS* IN 4A4 CR45 22P 15U 100 R189 1U C45 MURS120 C20 R188 C51 CR26 MMSZ5245BT1 15V 5% C50 MMSZ5245BT1 5% 15V 0.22U R192 2K Q49 MMBT3904 1.50K R195 3.57K 47 CW R197 R190 C19 4A4 +15V MP10 TIP31C 2N3904 VL 9 Q62 MJD350 +15V 0.47U CR18 1.1MA Q45 CR46 Q47 MMBT3904 5.6 R260 S MMBT3904 C21 +5V +15V SP+200 CR1 BAV99 86.6 MJD350 Q14 SGND SP+200 Q26 MMSZ5240BT1 10V 5% Q48 68K R25 IRF820 TO220HS VR1 V- -15V SGND SP+300 SP+200 GF1M MP2 3 2 1.00K [Q1] CR40 68K R104 68K R103 MMSZ5240BT1 10V 5% R1 470 V+ 1 0.1U GND SP+200 VR14 +15V VL C66 SP+400 BAV99 22P +5V U10 ADG413 R11 CR25 C18 0.02U 500V HVCOM SP+200 R23 68K R100 68K R101 470 3.3U 450V MJD350 68K MP6 IRF820 TO220HS C17 MJD350 Q61 68K [Q25] Q13 SP+400 68K R98 68K R99 68K 7 OP196GS V+ 6 NC SP+400 V8 4 B2 5 2 3 R102 U15 1 B1 SP+400 24.3K VN0605T VR49 SP+400 MMSZ5240B 5% 10V R49 R97 18.2 R94 18.2 SP+400 R235 R194 1.00K 5231 5% 5.1V VR48 R95 68K R96 68K C65 1U LF353 3D1 IN SP+400 C7 12 GF1M CR58 BAV99 100K CR30 BAV99 SGND Figure 6-6. A8 High Voltage PCA (cont) 6-34 C32 A32 4B1 Schematic Diagrams 6 2 C16 100U [Q7] [Q22] TP4 OUT 2D2 OUT 2A2 2N6520 MMSZ5263BT1 56V 5% SP+300 R176 R87 SP+400 VR37 SP+200 R174 150K R85 +PA SP+400 VR56 1N6456A 400V 5% C78 BAV99 R36 110 R156 6 4 MMBT3904 1.1MA 33.2K VN0550 S C14 100P -15V BAV99 CR36 Q19 R75 R73 S +15V CR21 VR57 1.5SMC47A 47V 5% Q17 7 110 VN0550 U9 LM393DT R74 Q20 3.3U 450V 110 8 R159 +15V 10.0K 10.0K R171 VR33 MMSZ5240BT1 5% 10V R92 R93 27K C13 +15V 1U 5 SP+200 +ON/OFF IN 5237 5% 8.2V R245 5240 10V 5% 4B4 VR26 3 CR60 R164 10.0K C15 3.16K C81 47P R168 200K R77 1 GND 27K R91 2 VR39 R83 6 9.1K SP+200 Q66 IRF820 MMSZ5240BT1 10V 5% 4 SP+200 0.1U 7 10.0K R241 R240 10.0K VR54 ZRB500 5.0V 450V BZG03 5% 200V VR10 C77 27K R253 10.0K GF1M SP+300 249K +15V VR 10 GF1M R89 150K BZG03 150V 5% VR13 330K 330K 330K R79 R68 33.2K S 10 SP+400 CR20 VR12 R86 9.1K GF1G R82 R80 CR11 R39 150K R37 SP+600 10 CR9 R71 SP+400 SP+400 2.00K VR9 3.3U HVREG_POS R70 SP+400 56K 4.7K U21 MC34081 3 R244 2 U22 5237 5% 8.2V C10 280K R84 SP+400 56K SP+300 249K Q18 VR8 R62 280K SP+200 R81 SP+400 56K R252 249K VN0550 SP+200 SP+200 SWA IN SP+300 VR6 SP+300 R61 VR5 450V BZG03 150V 5% 3.3U BZG03 150V 5% C12 +180UNR A5 C5 4C1 R78 SP+400 56K R242 SP+400 VR7 R64 A3 C3 R76 R243 280K R63 280K SP+400 Q21 R72 SP+400 Q23 SP+400 +HI/LO_V IN PMOS SP+600 10.0 SP+400 SP+400 GF1G 4B4 SP+600 CR23 BAV99 BZG03 5% 200V VR3 SP+600 BZG03 5% 150V +360UNR 2N6520 Q24 SP+600 SP+600 SP+600 BZG03 150V 5% A2 C2 SP+400 SP+200 CR10 P108 R88 SP+600 SP+400 SP+400 150K R41 56K VR11 SP+600 HVINT_POS 3.3 10V 5% MMSZ5240BT1 SP+600 SP+600 R38 GF1G CR12 VR4 R40 150K SP+600 SP+600 56K MMSZ5240BT1 10V 5% 56K R43 R42 56K SP+600 R90 +HVREG SP+600 15.0K 15.0K CR13 SP+600 TP2 MP9 IRF820 TO220HS 150K IRF820 TO220HS GF1G TP3 MMSZ5240BT1 10V 5% MP5 100K BAV99 CR22 0.1U -15V TP6 1U R169 R165 200K 10.0K 110 110 R157 5237 5% 8.2V Q37 R216 U9 LM393DT PMOS 110 C43 R158 33.2K R217 1 3 10.0K R172 VR34 MMSZ5240BT1 5% 10V 100K 8 2 VR27 R162 +15V I256 HVCOM VR58 -15V 1.5SMC47A 47V 5% C41 3.3U 4B4 IN 450V -ON/OFF SP-300 SP-300 R227 R175 150K TP17 R232 -HVREG SP-600 VR36 SP-400 Q43 SP-400 3.3 MP11 MTP2P50E TO220HS MTP2P50E TO220HS [Q57] [Q42] MMSZ5263BT1 56V 5% GF1M R177 150K R230 SP-400 Q58 2N6517 1N6456A 400V 5% SP-300 MMSZ5240BT1 10V 5% VR35 SP-600 VR38 R178 BAV99 150K CR39 R231 SP-600 BZG03 150V 5% 330K S VR47 330K VN0550 SP-600 VR59 SP-200 CR19 56K 15.0K 15.0K SP-400 SP-400 56K R229 SP-400 56K Q41 CR57 C42 100P +15V 10.0K R163 3.16K VR40 MMSZ5240BT1 10V 5% 27K R180 R255 -15V 27K R173 9.1K BZG03 5% 200V 4 BZG03 5% 200V R251 2.00K VR31 VR32 SP-200 SP-400 10V 5% MMSZ5240BT1 GF1G Q39 MMBT3906 -15V 1.1MA 27K 330K R166 56K CR38 SP-200 R170 GF1G CR56 MMSZ5240BT1 10V 5% R222 VR46 SP-600 MP14 C80 249K 249K R223 R225 SP-400 R167 CR55 GF1G R218 150K R220 150K R224 56K SP-600 SP-200 CR61 BAV99 BAV99 CR37 4 R181 R254 SP-400 SP-600 150K 56K R221 GF1G SP-600 47P 5240 5% 10V Q40 PMOS R182 249K R219 SP-600 SP-600 VR55 2 10.0K SP-200 R226 SP-200 0.1U CR54 SP-600 3 C82 SWB IN R248 SP-600 MTP2P50E 1 9.1K 4C1 R250 R249 R247 10.0K 100K -HI/LO_V IN SP-600 TP16 7 R246 10.0K 6 2 R154 4B4 Q67 3 4.7K BZG03 150V 5% VR45 SP-600 0.1U U24 MC34081 GND SP-400 -360UNR C79 R160 5237 5% 8.2V R161 301K VR30 BZG03 150V 5% BZG03 150V 5% VR29 ZRB500 5.0V PMOS BZG03 150V 5% VR44 3.3U 450V 280K R150 C37 +15V VR Q38 SP-300 56K R151 280K SP-300 A8 C8 M1 U23 SP-200 -180UNR SP-400 VR28 3.3U 450V 56K 280K A7 C7 R152 SP-200 C38 R228 SGND 280K R153 M1 2N6517 TP1 R179 8.2 C44 R66 SP-400 10 R67 SP-400 10 CR8 R65 SP-400 10 SP-400 GF1M -PA SP-400 100U HVINT_POS S1 C1 +45V RT1 47_OHM 20% RT2 -45V 47_OHM 20% O1 HVINT_NEG SP-600 C2 P1 HVREG_POS RUN HVREG_NEG P2 TEST O2 SLIDE SP-600 57LFC-1008 (3 of 4) Figure 6-6. A8 High Voltage PCA (cont) 6-35 57LFC Service Manual SPARES TP14 P208 74HCU04 C22 A22 U6 +5RLH 1 7 6 5 4 3 2 1 0 C62 10U 0.1U U6 1 DGND CLR_DRVR U7 VCC=P5V;GND=DGND IN OUT IN OUT CLR STB OE SET RST SET RST SET RST SET RST 16 15 16 15 16 15 16 15 6 9 10 11 12 VCC=P5V;GND=DGND 74HCU04 U6 9 8 VCC=P5V;GND=DGND 74HCU04 U6 11 10 COM VCC=P5V;GND=DGND RLY_RST* OUT 3B6 +15V VL V+ V+ VL 8 2 3 CR52 CR53 6 BAV99 BAV99 BAV99 BAV99 V- 5 8 CR50 GND SGND V+ SGND SGND 0.1U V+ SGND 16 10 11 V- 12 VL 13 13 U20 ADG413 9 7 COM CR49 12 U20 ADG413 13 12 VL 1 GND 14 U20 ADG413 GND 15 14 SGND V- GND V- 5 OUT C73 U20 ADG413 SGND 4 CLR STB OE 9 10 11 12 5 IN OUT 4 100P IN 5 6 5 4 3 1 2 C61 DGND A15 3C6 +5V 4 3 2 1 0 CR51 IG_CSO OUT SWB UCN5800L 12 BAV99 A11 SWA DGND U13 U6 13 IG_WR* 2K U6 74HCU04 VCC=P5V;GND=DGND R213 VCC=P5V;GND=DGND 74HCU04 5 12 +5V 2 K2 13 6 4 5 1 2 7 9 10 11 12 13 14 15 1 2 K1 4 1 2 3 6 5 4 3 14 IG_ADDR0 IG_ADDR1 IG_ADDR2 1 2 K4 4 UCN5800L 7 6 5 4 74HC138 Y7 A Y6 B Y5 C Y4 Y3 Y2 G1 Y1 G2A Y0 G2B 1 2 K3 DGND VDD=P5V;GND=DGND U12 A16 C13 VCC=P5V;GND=DGND 74HCU04 3 IG_DATA<7..0> A8 C8 A9 2 25V 8 C6 A6 C5 A5 C4 A4 C3 A3 C75 C74 SGND 0.1U VDD=P5V;GND=DGND SGND -15V SGND +5V A18 A19 TP15 +15V -HI/LO_V OUT 3B7 R215 4.7K +5V 1.00K R212 VCC=P5V;GND=DGND -15V 8 +15V 9 C59 10U 25V C64 C63 C60 C39 C36 C76 0.1U 0.1U 0.1U 0.1U 0.1U 0.1U OUT R259 2.21K R258 2.21K R257 2.21K R256 2.21K 13 +5V -15V 3 VSS 8 D 14 S1 S2 S3 S4 S5 S6 S7 S8 GND DGND EN A0 A1 A2 4 5 6 7 12 11 10 9 C87 C88 C89 C90 0.1U 0.1U 0.1U 0.1U MP6 E3 MP7 E4 MP9 E6 MP11 E8 E2 -15V E5 E7 E9 4 5 6 7 12 11 10 9 VDD S1 S2 S3 S4 S5 S6 S7 S8 13 VSS 3 D 8 GND SGND -15V C72 14 12 +15V VDD 0.1U VL 13 R238 NOLOAD 4.53K C71 +5V LM339 DG408DY 0.1U SGND 3B3 U19 NOLOAD DG408DY SGND -ON/OFF +15V +15V U8 14 GND 3 V+ 14 15 16 U10 ADG413 GND 5 13 LM339 GND 3 A2 A1 A0 EN V- SMUX 4 U8 11 2 VO 1 10 +15V 2 VO 2 -15V U18 MP11 U28 16 3C7 GND 3 C86 0.1U 1 LM35D +VS 15 OUT 5231 5% 5.1V VR52 NOLOAD +HI/LO_V MP9 U27 2 301 2 LM339 +5V C85 0.1U 1 LM35D +VS VO 15 OE U8 5 GND 3 NOLOAD MMBT3906 Q65 1 1 4 MP7 U26 VO 16 11 DGND -15V C84 0.1U 1 LM35D +VS 2 3C3 2 19 16 15 12 9 6 5 2 OUT NOLOAD 5237 5% 8.2V Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 R69 D7 D6 D5 D4 D3 D2 D1 D0 R214 18 17 14 13 8 7 4 3 10.0K 7 6 5 4 3 2 1 0 +ON/OFF +15V 48.7K 12 74HC374 VR53 10.0K LM339 1 U14 R237 U8 3 7 MP6 U25 0.1U 1 LM35D +VS +15V NOLOAD 6 R155 0.1U 48.7K C83 C40 NOLOAD R239 C2 A2 C7 A7 C10 A10 C12 A12 C14 A14 C17 A17 C18 C20 A20 C21 A21 C23 A23 -15V +5V SGND SGND DGND DGND SGND CKVATEMPS* TP11 TP12 U17 CR35 74HC374 VA_I_POS* OUT 2C2 VA_I_NEG* OUT 2B2 MBRS140 CR48 MBRS140 SGND DGND 7 6 5 4 3 2 1 0 18 17 14 13 8 7 4 3 D7 D6 D5 D4 D3 D2 D1 D0 Q7 Q6 Q5 Q4 Q3 Q2 Q1 Q0 19 16 15 12 9 6 5 2 11 1 OE 57LFC-1008 (4 of 4) VCC=P5V;GND=DGND Figure 6-6. A8 High Voltage PCA (cont) 6-36 OUT 2B1 Schematic Diagrams 6 57LFC-7609 (1 of 1) Figure 6-7. A9 Out-Guard CPU PCA 6-37 57LFC Service Manual 8 6 7 5 3 4 1 VCC A<19..1> 16 2D8 CS<7..0>* 3A8 4 VCC 11 10 T1I T2I L1 14 7 T1O T2O 70_OHM U20 12 9 R1O R2O 1 3 C1+ C1- D VCC S2 4 5 C73 0.1UF C2+ C2- O T1I T2I T1O T2O 14 7 R1O R2O R1I R2I 13 8 C64 A_TX +12V VCC VCC 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 R5 0.0 1. JTAG PORT G 7 PB7/IRQ6 IACK1 IACK4 IACK7 IRQ1 IRQ4 IRQ7 D0 D1 D2 D3 D4 D5 D6 D7 D8 D9 D10 D11 D12 D13 D14 D15 BERR DTACK FC0 FC1 MC68306 R59 3K 3C8 +12V U10 100P 3 VIN S/D VOUT 2 LP2980-5 R34 3K J1 2 Z2 1 2 1 U14 Z1 3 4 1K 68C681CJ VCC R9 3K R8 3K 7 6 4 2 A4 A3 A2 A1 TXDA TXDB RXDA RXDB 33 13 35 11 7 6 5 4 3 2 1 0 21 25 20 26 19 27 18 28 D7 D6 D5 D4 D3 D2 D1 D0 OP7 OP6 OP5 OP4 OP3 OP2 OP1 OP0 17 29 16 30 15 31 14 32 VCC 9 39 10 R/W CS DTACK 24 41 INTR IACK 38 RESET VCC 10.7K 3.6K DS8923A + - 8 PFO VCC G DTACK* VBATT RESET GND UW* 0.001U V_BAK VCC C17 U9 C22 1. C24 0.01U 2 CS<2>* 2 68C681CJ TMS9914AFN SN75ALS160DW SN75ALS161DW R15 44 44 20 20 R13 51.1 2 15 R6 51.1 4 9 15 C71 NOTES: 1. PART NOT INSTALLED. 330PF G 2B8 3A8 3A8 3A8 2C8 2B8,3A8 2B8 A 5 7SZ125 4 OE 1 3 RT_CS* PULLED UP TO V_BAK AT THE RTC CHIP C28 3 2B8 57LFC-1009 (1 of 2) 0.01U E11 VCC G 8 G 7 B 27 16 + - 24 1 4 7SZ126 U8 NONE 3 BT1 3.0V R17 1K U14 U21 U24 U25 V_BAK 30,31 30,31 7,28,40 61,73,94 106,127 5 RST* 1D3 7 10 VCC 3 3C8 LW* LTC694 8 390 GGND 6 1,12,21 23,39 23,39 1,13,22 34,46,55 67,79,88 100,112 121 22 22 10 10 G 2B4 5 14 10 TO INGUARD CPU 5 0 4 3 2 PFI PARTNAME DS8923A RTC64613 E28F004BL E28F004BL MC68306 R14 R18 U2 U1 4 11 9 G 18 19 20 21 23 24 25 26 27 29 30 31 32 33 35 36 37 38 39 41 42 43 44 45 47 48 49 1 100PF REF DES U2 U3 U5 U6 U10 27 U2 OE* VOUT R11 499 R21 DS8923A 2 WDI C9 14 R7 499 13 R20 TO MOTHERBOARD 16 18 1 3 -12V 36 47U VCC 6 E4 ENCSIG ENC_RESET* T_DS F_DS G R22 1K CLK_3.68M A 1K 3 4 13 + 2 42 43 3 40 5 8 IP5 IP4 IP3 IP2 IP1 IP0 C 6 12 8 U2 DS8923A 4 3 2 1 R/W* G SH 5 +12V -12V G RESET* R2 2K TO AUX SERIAL PORT REFERENCE DESIGNATON LAST NOT USED USED BT1 C10,14 C73 E11 E1-3 J4 J3 L24 MP5 MP1,2 P3 P2 R60 R10,12,16,23-33,35 R36,38-53 S2 S1 U35 U12,13,15-18,22,23 U26-31 Y2 Z2 E7 E6 VCC Y1 V_BAK 1 5 10U D<15..0> VCC 6 A_RLSD C67 1 C13 R4 2K A_DSR 5 E5 37 G R56 2K R3 2K G X2 X1/CLK 12MHZ C1 22PF C2 22PF P3 7 U4 GND 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 8 C61 100P G 1 IRQ<2>* 82 81 80 78 77 76 75 74 72 71 70 69 68 66 65 64 63 62 60 59 58 57 56 54 53 52 51 SH 70_OHM R55 2K +12V R37 3K TO SERIAL PORT SH 3 100P 11 A21/CS5 A20/CS4 CS3 CS2 CS1 CS0 CAS0 CAS1 RAS0 RAS1 DRAMW OE LW UW LDS UDS R/W AS BGACK BG BR EXTAL XTAL CLKOUT HALT RESET FC2 B TRST TCK TMS TDI TDO AMODE A19 A18 A17 A16 A15/DRAMA14 A14/DRAMA13 A13/DRAMA12 A12/DRAMA11 A11/DRAMA10 A10/DRAMA9 A9/DRAMA8 A8/DRAMA7 A7/DRAMA6 A6/DRAMA5 A5/DRAMA4 A4/DRAMA3 A3/DRAMA2 A2/DRAMA1 A1/DRAMA0 A23/CS7 A22/CS6 L8 A_RTS GND VCC 117 118 119 120 122 123 124 125 126 128 129 130 131 132 2 3 4 5 6 8 9 10 11 12 14 15 16 70_OHM 6 2 C72 0.1UF 3A8 70_OHMC57 L4 2B3 P1 8 2 3 6 7 10 4 1 5 9 C2+ C2- VV+ D J2 2 4 115 114 113 111 110 109 108 107 105 104 103 102 101 99 98 97 96 95 93 92 91 90 89 87 86 85 84 G 4 5 VCC IRQ<3>* IRQ<5>* OP1/RTSB OP0/RTSA IP1/CTSB IP0/CTSA TXDB RXDB TXDA RXDA OP3 IP2 X2 X1 PA0 PA1 PA2 PA3 PA4 PA5 PA6 PA7 PB0/IACK2 PB1/IACK3 PB2/IACK5 PB3/IACK6 PB4/IRQ2 PB5/IRQ3 PB6/IRQ5 C C1+ C1- L7 100P C60 A_LTS 0.1UF 2 NC7SZ04 3 1 3 C56 70_OHM 5 5 4 4 L3 A_RCV 15 Y2 G 3.6864MHZ U7 C4 22PF 100P 70_OHM S_DTR R57 2K G LT1781 C3 22PF 8 16 12 9 C18 7 C63 100P 5 11 U19 0.01U C59 10 9 VCC 11 10 2 100P 15 VCC G VCC L6 R58 2K +12V GND P CALSW* 70_OHM S_CTS 0.1UF C L2 70_OHM S_RTS 6 2 VV+ SH S_RCV LT1781 C66 100P C62 L5 13 8 R1I R2I 10 3 C58 S_TX 6 5 4 3 2 Figure 6-7. A9 Out-Guard CPU PCA (cont) 6-38 Schematic Diagrams 18 NC7SZ04 8 9 10 11 12 13 14 15 VCC 5 2 C29 0.01U U11 G 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 12 11 10 9 8 7 6 5 27 26 23 25 4 28 3 31 2 CE1 22 CE2 30 24 29 OE A0 A1 A2 A3 A4 A5 U34 A6 A7 A8 M5M51008 A9 A10 A11 A12 A13 A14 A15 A16 DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 MEMORY MAP CS0 - BOOT ROM, CAL CONSTANTS ROM BANK 0 OR 1 CS1 - ROM BANK 0 OR 1 CS2 - REAL TIME CLOCK CS3 - RAM (A18=0 - BANK 0 FOR 128K PARTS) CS3 - RAM (A18=1 - BANK 1 FOR 128K PARTS) E28F004BL 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 CE1 22 CE2 30 24 29 OE WE +12V G 16 GND WE 8 9 10 11 12 13 14 15 13 14 15 17 18 19 20 21 G UW* 13 14 15 17 18 19 20 21 DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 VCC 3 A0 A1 A2 A3 A4 A5 U33 A6 A7 A8 M5M51008 A9 A10 A11 A12 A13 A14 A15 A16 16 GND 1A4 12 11 10 9 8 7 6 5 27 26 23 25 4 28 3 31 2 RAM BANK 0 128K X 8 RAM X 4 4 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 VCC 32 VCC VCC 32 RAM BANK 1 A<19..1> 1D3 18 A0 RP A1 A2 A3 U6 DQ0 A4 DQ1 A5 DQ2 A6 DQ3 A7 DQ4 A8 DQ5 A9 DQ6 A10 DQ7 A11 A12 A13 A14 A15 DU A16 A17 A18 11 9 22 24 VPP WE CE OE 12 11 10 9 8 7 6 5 27 26 23 25 4 28 3 31 2 VCC VCC 32 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 A0 A1 A2 A3 A4 A5 U32 A6 A7 A8 M5M51008 A9 A10 A11 A12 A13 A14 A15 A16 13 14 15 17 18 19 20 21 DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 0 1 2 3 4 5 6 7 12 11 10 9 8 7 6 5 27 26 23 25 4 28 3 31 2 25 26 27 28 32 33 34 35 CS4 - DUART FOR EXTERNAL RS-232 PORTS CS5 - DEBUG DUART PAGE1 IN CS6 - UNUSED CS7 - IEEE-488 8 9 10 11 12 13 14 15 INTERRUPT LEVEL ASSIGNMENTS IRQ7 IRQ6 IRQ5 IRQ4 IRQ3 IRQ2 IRQ1 - INTERNAL 10MS TIMER UNUSED IEEE-488 INTERFACE EXTERNAL DUART REAL TIME CLOCK DEVELOPMENT DUART WATCHDOG TIMER 12 G REAL TIME CLOCK VCC A0 A1 A2 A3 A4 A5 U35 A6 A7 A8 M5M51008 A9 A10 A11 A12 A13 A14 A15 A16 DQ0 DQ1 DQ2 DQ3 DQ4 DQ5 DQ6 DQ7 0 1 2 3 4 5 6 7 13 14 15 17 18 19 20 21 CE1 22 CE2 30 24 29 OE 1D3 CS<0>* 1A4 OE* 1A4 D<15..0> 11 9 22 24 G 16 GND WE 16 GND WE 21 20 19 18 17 16 15 14 8 7 36 6 5 4 3 2 1 40 13 A0 RP A1 A2 A3 U5 DQ0 A4 DQ1 A5 DQ2 A6 DQ3 A7 DQ4 A8 DQ5 A9 DQ6 A10 DQ7 A11 A12 A13 A14 A15 DU A16 A17 A18 VPP WE CE OE 10 2 25 26 27 28 32 33 34 35 0 1 2 3 4 5 6 7 1HZ IRQ I/O0 I/O1 I/O2 CS I/O3 OE I/O4 WE I/O5 I/O6 HST/SP I/O7 C5 C36 C7 C19 C25 C31 C37 C43 C48 C8 C11 C15 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 9 10 11 13 14 15 16 17 1C6 0 1 2 3 4 5 6 7 IEEE-488 CONNECTOR 25 SH 16 15 14 13 4 3 2 1 L17 L9 L18 L10 L19 L11 L20 L12 11 5 10 17 9 6 8 7 L21 L13 L22 L14 L23 L15 L24 L16 U21 TMS9914AFN 1 2 3 4 5 6 7 8 12 G 42 41 39 38 37 36 35 34 3 VCC 1D3 A<3..1> 1A4 R/W* 1 2 3 LW* CS<7>* RESET* 1A4 CLK_3.68M 1A4 D<7..0> 7 8 9 6 5 4 21 20 DIO1 DIO2 DIO3 DIO4 DIO5 DIO6 DIO7 DIO8 ACCGR RS0 RS1 RS2 DBIN WE CE RESET CLK 75ALS160N CONT<7..0> DAV NRFD NDAC ATN REN IFC SRQ EOI 29 27 26 31 24 25 32 30 ACCRQ INT TR CONT TE 2 10 43 33 23 D0 D1 D2 D3 D4 D5 D6 D7 19 17 16 15 14 13 12 11 7 6 5 4 3 2 1 0 8 7 6 5 4 3 2 1 19 18 17 16 15 14 13 12 VCC 1 11 4 0 1 3 2 7 5 6 13 14 12 19 18 15 17 16 U24 D B 2 3 4 5 6 7 8 9 BIO8 BIO7 BIO6 BIO5 BIO4 BIO3 DIO2 DIO1 70_OHM TE PE U25 T 7 6 5 4 3 2 1 0 B 8 7 9 2 3 6 4 5 ATN EOI SRQ REN IFC DAV NDAC NRFD TE DC VCC 0.01U IRQ<3>* 3 J4 1D3 C42 4 DIO<8..1> 1A4 VCC A0 A1 A2 A3 G G 1A4 RT_CS* 8 7 6 5 18 19 20 E28F004BL CE1 22 CE2 30 24 OE 29 1 2 3 4 G LW* U3 RTC64613 R60 3K 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 R19 3K 0.01U V_BAK +12V 1A4 RESET* 10 C47 VCC 1A4 21 20 19 18 17 16 15 14 8 7 36 6 5 4 3 2 1 40 13 CS<3>* VCC 32 1D3 6 1 11 ATN EOI SRQ REN IFC DAV NDAC NRFD 70_OHM 18 19 20 21 22 23 24 SN75ALS161DW C20 0.01U VCC 12 R54 3K G C50 C51 C52 C27 C45 C26 C32 C38 C44 C49 C53 C12 C16 C21 10U 10U 10U 10U 10U 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 0.01U 26 1C6 IRQ<5>* SH G G +12V R1 10.0K VCC E8 C54 C68 10U 10U C39 0.1UF C41 0.1UF C46 0.1UF C55 0.1UF C40 0.1UF C30 0.1UF C6 0.1UF C69 C70 10U 10U C33 C23 0.1UF 10U 100P 500V C35 G MP3 E9 E10 C65 MTG HOLES OF J4 ARE TIED TO CHASSIS GND G MP5 WIREPOINTS TO GND FOR MOUNTING HOLES 100P 500V -12V C34 MP4 100P 500V 57LFC-1009 (2 of 2) G Figure 6-7. A9 Out-Guard CPU PCA (cont) 6-39 57LFC Service Manual 6-40