Download AUSTRALIAN MONITOR AMIS120XL Series Specifications
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SERVICE INFORMATION AMIS120 MIXER AMPLIFIER (6ch version) CONTENTS: OPERATION MANUAL PRODUCT DESCRIPTION SCHEMATIC DIAGRAMS BOARD LAYOUTS SERVICE BULLETINS * Over the years there have been a number of revisions to this model Australian Monitor 1 Clyde Street, Silverwater NSW 2128 Australia +61 2 9647 1411 www.australianmonitor.com.au AMIS SERIES 6 0 W / 1 2 0 W M I X E R A M P L I FIER I N S TA L L AT I O N A N D O P E R AT I O N M A N UAL I M P O RTA N T SAFETY INFORMATION 1. Save the carton and packing material even if the equipment has arrived in good condition. Should you ever need to ship the unit, use only the original factory packing. 2. Read all documentation before operating your equipment. Retain all documentation for future reference. 3. Follow all instructions printed on unit chassis for proper operation. 4. Do not spill water or other liquids into or on the unit, or operate the unit while standing in liquid. 5. Make sure power outlets conform to the power requirements listed on the back of the unit. 6. Do not use the unit if the electrical power cord is frayed or broken. The power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords and plugs, convenience receptacles, and the point where they exit from the appliance. 7. Always operate the unit with the AC ground wire connected to the electrical system ground. Precautions should be taken so that the means of grounding of a piece of equipment is not defeated. 13. Do not block fan intake or exhaust ports. Do not operate equipment on a surface or in an environment which may impede the normal flow of air around the unit, such as a bed, rug, weathersheet, carpet, or completely enclosed rack. If the unit is used in an extremely dusty or smoky environment, the unit should be periodically “blown free” of foreign matter. 14. Do not remove the cover. Removing the cover will expose you to potentially dangerous voltages. There are no user serviceable parts inside. 15. Do not drive the inputs with a signal level greater than that required to drive equipment to full output. 16. Do not connect the inputs / outputs of amplifiers or consoles to any other voltage source, such as a battery, mains source, or power supply, regardless of whether the amplifier or console is turned on or off. 17. Do not run the output of any amplifier channel back into another channel’s input. Do not parallel- or series-connect an amplifier output with any other amplifier output. Australian Monitor Inc is not responsible for damage to loudspeakers for any reason. 18. Do not ground any red (“hot”) terminal. Never connect a “hot” (red) output to ground or to another “hot” (red) output! 8. Mains voltage must be correct and the same as that printed on the rear of the unit. Damage caused by connection to improper AC voltage is not covered by any warranty. 19. Non-use periods. The power cord of equipment should be unplugged from the outlet when left unused for a long period of time. 9. Have gain controls on amplifiers turned down during power-up to prevent speaker damage if there are high signal levels at the inputs. 20. Service Information Equipment should be serviced by qualified service personnel when: 10 Power down & disconnect units from mains voltage before making connections. A. The power supply cord or the plug has been damaged. B. Objects have fallen, or liquid has been spilled into the equipment 11. Never hold a power switch in the “ON” position if it won’t stay there itself! C. The equipment has been exposed to rain 12. Do not use the unit near stoves, heat registers, radiators, or other heat producing devices. D. The equipment does not appear to operate normally, or exhibits a marked change in performance E. The equipment has been dropped, or the enclosure damaged. THIS SAFETY INFORMATION IS OF A GENERAL NATURE AND MAY BE SUPERSEDED BY INSTRUCTIONS CONTAINED WITHIN THIS MANUAL INTRODUCTION AND CONTENTS The AMIS60 and AMIS120 mixer amplifiers are designed for commercial installations. Both models operate on 230/240 VAC, 50Hz (115VAC, 60Hz) or 24 VDC, and may be desk or rack mounted (rack mount kit supplied fitted). The AMIS60 will deliver 60 watts into a load of 8 ohms, 70 volt or 100 volt line. The AMIS120 will deliver 120 watts into a load of 4 or 8 ohms, 70 volt or 100 volt line. Both Models feature 6 universal mic/line inputs. The AMIS60/120 also feature a dual RCA record output while a balanced XLR output is also provided to feed external booster power amplifiers. Other standard features include on-board bell, pre-announce, alert & evac tones, remote master VCA control & priority muting. As standard, both models are self standing and come with rubber feet. INTRODUCTION 3 FRONT PANEL 4 REAR PANEL 5 INSTALLATION 6 SE TUP & TROUBLESHOOTING 7 DIMENSIONS 8 BLOCK DIAGRAM 9 SPECIFICATIONS 10 AUS, EUR, USA Copyright 21st Mar 2007 Rev A: 21st Mar 2007 This symbol is intended to alert the user to the presence of uninsulated “dangerous voltage” within the products enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, This symbol is intended to alert the user to the presence of important operational and maintenance (servicing) instructions in the literature accompanying the appliance. DO NOT REMOVE COVER (OR BACK), NO USER SERVICEABLE PARTS INSIDE, REFER SERVICING TO QUALIFIED SERVICE PERSONAL. Caution: WARNING! TO REDUCE THE RISK OF FIRE OR ELECTRIC HOCK To prevent electric shock do not use this (polarised) plug with an extension cord, receptacle or other outlet unless the blades can be fully inserted to prevent blade exposure. To prevent electric shock, match wide blade of plug to wide slot, fully insert. DO NOT EXPOSE THIS EQUIPMENT TO RAIN OR MOISTURE. A M I S S E R I E S I N S TA L L AT I O N & O P E R AT I O N M A N U A L PA G E 3 F R O N T PA N E L 1 1 2 3 4 5 6 CH 1-6 These control the individual level for each channel input. 2 BASS There is 12dB of cut and boost at 100Hz. This EQ is the shelving type. 3 TREBLE There is 9dB of cut and boost at 10kHz. This EQ is the shelving type. 4 MASTER This controls the overall output level. 5 ON This LED indicates the unit is powered “on”. NOTE: When using the “24VDC” in terminals, the amplifier is ‘on’ and the power LED will always be on regardless of the position of the power switch. 6 POWER This switch switches power on or off from the mains. The up position is on. NOTE: When using the “24VDC” in terminals, the amplifier is ‘on’ regardless of the switch position. PA G E 4 A M I S S E R I E S I N S TA L L AT I O N & O P E R AT I O N M A N U A L R E A R PA N E L 11 10 1 4 7 12 3 CH 1-6 Each channel input section has two inputs: XLR input – This is a balanced microphone input. It has an input sensitivity of 1mV. RCA input – This is an unbalanced line level input. It has an input sensitivity of 150mV. The two RCA sockets are summed to mono internally. 2 REC OUTPUT The REC output is on unbalanced RCA connectors. The output level is 300mV into 10kohm at rated output. The output is dual mono. The REC output is not affected by the MASTER volume control or the BASS and TREBLE controls. The REC output does not receive the tone signal. 3 LINE OUTPUT The LINE output is on a balanced XLR connector. The output level is 2V into 1k at rated output. NOTE: When wiring the LINE output as unbalanced, Pin2 should be wired as hot and Pin1 should be wired as ground/shield. Do not wire Pin3. 4 AMP OUT The speaker connections are on the 12 pole terminal strip. There is a low impedance output (OHM) and a distributed line voltage output (LINE). 25V/70V out is available on 115V models. 70V/100V out is available on 230V/240V models. 8ohm out is available on the AMIS60 and AMIS120. 4ohm out is available on the AMIS120. MINIMUM IMPEDANCE Distributed Line Output AMIS60 AMIS120 25V (115V version) 10.4ohm 5.2ohm 100V (230/240V version) 333ohm 166ohm 70V (230/240 & 115V versions) 166ohm 83ohm Low Impedance Output 4 ohm (230/240 & 115V versions) N/A 4ohm 8 ohm (230/240 & 115V versions) 8ohm 8ohm NOTE: Only connect one output - either Distributed Line or Low Impedance per channel. Do not connect the 8ohm, 4ohm and 100V at the same time. The output strip comes fitted with a touch-proof cover held in place by two M3 machine screws with flat and spring washers. 9 6 5 8 2 5 1 VCA CONTROL These two terminals provide connection for an external potentiometer (500k log) which is available mounted on a wall panel from Australian Monitor (RC1). When the potentiometer is connected it allows for remote control of the master level. The external pot is governed by the master level of the amplifier allowing the installer to set the volume and then lock the amplifier in a rack, leaving the user with just a master volume control that cannot go beyond the level set on the front panel master control. The terminals can also be used as a system mute by shorting the two contacts together (by a relay or switch for example). 6 VOX RELAY These terminals provide connection for the priority relay output. The relay outputs are C (Common), NO (Normally Open) and NC (Normally Closed). These are the states of the relay when the amplifier is off (mains or dc). When the unit is switched on the relay activates. The relay deactivates when signal is present at any of the priority inputs regardless of the front panel channel volumes. This would normally be inputs 1 and 2 however these channels can be removed from the priority bus via internal links (see “Functional Notes’). The unit is shipped from the factory with inputs 1 and 2 having priority so assuming that this has not been changed, signal at any of these inputs will deactivate the VOX relay circuit. The relay also deactivates when a tone sound is triggered The NO or NC selection provides the installer with the option of the relay either opening or closing a contact. This feature is normally used in conjunction with relay override attenuators (volume controls). In this application, the relay output could trigger an accessory power supply which in turn bypasses the remote attenuators. The result is that priority inputs or alarm tones will always be heard irrespective of the attenuator setting. The relay contacts are rated at 3 amps at 125VAC/30VDC.The relay can be disabled via an internal link (see “Internal Settings”). 7 TONES MODULE These terminals provide connection for triggering the in built tone module. The four tones can be activated individually by shorting the named terminal to COM. When any tone is activated, all inputs (except for inputs 1 and 2) will automatically mute. The level of the tones can by adjusted internally (see “Internal Adjustments”). The pot adjusts the level for all 4 tones. A M I S S E R I E S I N S TA L L AT I O N & O P E R AT I O N M A N U A L Tones available on the AMIS60 and AMIS120 are: - Evacuation Tone - Alert Tone - Bell Tone - Pre-Announce Chime 8 TELEPHONE INPUT (only on 115V models) The 600 ohm transformer balanced Telephone Input is paralleled with input 2. If telephone paging is required, the XLR & dual RCA inputs should not be used as these inputs will be summed with the Telephone Input into channel 2. The front panel level control will set the gain for the Telephone Input. The Telephone input is shipped with a jumper lead connected to the input terminals; this must be discarded if the telephone input is to be used. 9 24VDC POWER IN These terminals provide connection for an external 24V emergency power system and are not switched by the front panel power switch. The 24VDC in does NOT provide any trickle charge facility. The binding posts can accommodate wire of up to 1.5mm in diameter. The maximum current draw at 24VDC is 9A. 10 IEC MAINS INPUT SOCKET This is a standard IEC 3 pin socket. It accepts a standard IEC mains cable, provided. The fuse draw contains the mains fuse and a spare. AMIS60 AMIS120 230V/240V model 2A 3.15A 115V model 3.15A 4A IMPORTANT: Always replace the fuse with one of the same value and type. NOTE: Always disconnect power to the amplifier before replacing fuses. 11 VOLTAGE SELECT SWITCH (only on 230V/240V models) This switch is used to select the mains voltage for your region. IMPORTANT: Disconnect power to the amplifier before operating this switch. 12 PHANTOM POWER This switch enabes +15V phantom power across all XLR input connectors. PA G E 5 I N S TA L L AT I O N MOUNTING OUTPUT CONNECTIONS When rack mounting, it is advisable to allow 1 rack space above and below the amplifier. When multiple amplifiers are mounted in a rack, exhaust fans should be used on the rack. Airflow for cooling the amplifier is by convection from bottom to top and by fan left to right. The output terminal strip accepts wire sizes from 16-22AWG (1.5mm2 - 0.35mm2). The following table should be used as a guideline for cable sizes. Regulations in your area may require different gauged wire and should be checked before using. OUTPUT DISTANCE WIRE SIZE AMC60 100V Up to 50m AWG26(0.12mm ) AWG24(0.2mm2) 50m–200m AWG20(0.5mm2) AWG18(0.75mm2) Over 200m AWG18(0.75mm2) AWG16(1.5mm2) 70V Up to 50m AWG24(0.2mm2) AWG22(0.35mm2) 50m–200m AWG18(0.75mm2) AWG16(1.5mm2) Over 200m AWG16(1.5mm2) AWG13(2.5mm2) 4 ohm Up to 10m AWG20(0.5mm2) AWG20(0.5mm2) 10m–30m AWG16(1.5mm2) AWG16(1.5mm2) Over 30m Not Recommended Not Recommended 8 ohm Up to 10m AWG24(0.2mm ) AWG24(0.2mm2) 10m–30m AWG18(0.75mm2) AWG18(0.75mm2) Over 30m Not Recommended Not Recommended AMC120 2 2 230/240V version NOTE: Only connect one output - either Distributed Line or Low Impedance. The LINE output XLR can be used to connect up to 6 booster amplifiers. Balanced input wiring (shielded pair cable) is recommended. 115V version Both versions PA G E 6 NOTE: When wiring the LINE output as unbalanced, Pin2 should be wired as hot and Pin1 should be wired as ground/shield. Do not wire Pin3. The REC output wiring should be kept as short as possible. INPUT CONNECTIONS For wiring balanced in, pin 2 is hot. Unbalanced wiring on the microphone inputs is not recommended. Balanced input wiring (shielded pair cable) is recommended. Unbalanced RCA wiring should be keep as short as possible. A M I S S E R I E S I N S TA L L AT I O N & O P E R AT I O N M A N U A L SETUP & TROUBLESHOOTING Levels Volume controls should aimed to be set at nominal, which is at the half or 12o’clock position. Any unused channels should be set to minimum. When establishing a mix, remember: Less is more. TROUBL E S H O O T I N G G U I D E TROUBLE LIKELY CAUSE REMEDY Power LED not on Power not reaching amplifier Check mains connection Check mains fuse Check power switch is on Distorted sound Output is short circuit Input is overloaded Output is being over driven Bass control is turned up Check speaker loads for shorts Reduce input level at source Reduce volume levels on front panel Reduce Bass control level No sound but amp is on DC fuse(s) blown Volume controls down Amplifier has overheated Refer product to local Australian Monitor dealer Check volume controls Make sure the amplifier is well ventilated. No sound from channels 3-6 Priority function is being used Remove signal (disconnect input) from channel 1 OR Disable priority function (see Internal Adjustments) Condenser microphone does not work Phantom power not switched on Turn on phantom power switch on back panel. PRIORITY Channel 1 and 2 are set up to mute channels 3 to 6. This will only occur when signal appears on channel 1 or 2 irrespective of the channel volume control. Priority can be disabled. (See below). The release time is approx. 1 sec and is NOT adjustable. The mute depth is greater than 60dB and is not adjustable. A M I S S E R I E S I N S TA L L AT I O N & O P E R AT I O N M A N U A L PA G E 7 DIMENSIONS PA G E 8 A M I S S E R I E S I N S TA L L AT I O N & O P E R AT I O N M A N U A L BLOCK DIAGRAM A M I S S E R I E S I N S TA L L AT I O N & O P E R AT I O N M A N U A L PA G E 9 S P E C I F I C AT I O N S AMIS 60 AMIS 120 POWER OUTPUT (0.5%THD, 1KHZ) 60W 120W S/N RATIO > 76dBr > 76dBr 60Hz-15kHz 60Hz-15kHz POWER BANDWIDTH (-3DB +1DB) OUTPUT REGULATION 90% 90% SIZE (WXHXD) 482x88x313.5mm 19”x3.5”x12.3” 482x88x313.5mm 19”x3.5”x12.3” 8.5kg 18.7lb 11.0kg 24.2lb 525x175x385mm 20.7”x6.9”x15.2” 525x175x385mm 20.7”x6.9”x15.2” 10.5kg 23.1lb 13.0kg 28.6lb NET WEIGHT SHIPPING DIMENSIONS (WXHXD) SHIPPING WEIGHT COMMON TO ALL MODELS THD (1KHz, -1dB) < 0.5% MIC INPUT SENSITIVITY IMPEDANCE HEADROOM 1mV 1k3 ohm 136mV (42dB) AUX INPUT SENSITIVITY IMPEDANCE HEADROOM 50mV >200kohm > 15V (>40dB) TONE CONTROLBASS @ 100HZ TREBLE @ 10KHZ LINE OUT +/- 12 dB +/- 9 dB SENSITIVITY OUTPUT IMPEDANCE 2V @ 1kohm 100ohm TAPE SENSITIVITY OUTPUT IMPEDANCE 300mV @ 10kohm 100ohm PA G E 1 0 A M I S S E R I E S I N S TA L L AT I O N & O P E R AT I O N M A N U A L S P E C I F I C AT I O N S AMIS 60 AMIS 120 MAINS CURRENT DRAW (240V) FULL POWER 1/3 POWER 1/8 POWER IDLE 0.75A 0.50A 0.40A 0.25A 1.5A 0.95A 0.65A 0.15A MAINS CURRENT DRAW (115V) FULL POWER 1/3 POWER 1/8 POWER IDLE 1.6A 1.0A 0.80A 0.50A 3.1A 2.0A 1.4A 0.30A THERMAL OUTPUT (W) FULL POWER 1/3 POWER 1/8 POWER IDLE 80W 70W 55W 15W 170W 140W 110W 20W THERMAL OUTPUT (BTU/HR) FULL POWER 1/3 POWER 1/8 POWER IDLE 273 239 188 51 580 478 375 68 *1/3 and 1/8 power levels relate to voltage changes, not load changes. A M I S S E R I E S I N S TA L L AT I O N & O P E R AT I O N M A N U A L PA G E 1 1 AUSTRALIA AND NEW ZEALAND w w w. a u s t r a l i a n m o n i t o r. c o m . a u SYDNEY MELBOURNE BRISBANE ADELAIDE PERTH AUCKLAND (NSW & ACT SALES) (VIC & TAS SALES) (QLD SALES) (SA & NT SALES) (WA SALES) (NZ SALES) 1 Clyde Street Silverwater NSW 2128 Private Bag 149 Silverwater NSW 1811 Phone: (02) 9647 1411 Fax: (02) 9648 3698 Email: [email protected] 22/277 Middleborough Road Box Hill VIC 3128 PO Box 151 Blackburn South VIC 3130 Phone: (03) 9890 7477 Fax: (03) 9890 7977 Email: [email protected] 42 Commercial Road Fortitude Valley QLD 4006 PO Box 871 Fortitude Valley QLD 4006 Phone: (07) 3852 1312 Fax: (07) 3252 1237 Email: [email protected] 31 Walsh Street Thebarton SA 5031 PO Box 157 Hindmarsh SA 5007 Phone: (08) 8352 4444 Fax: (08) 8352 4488 Email: [email protected] 3/11 Howe Street Osborne Park WA 6017 PO Box 1281 Osborne Park BC WA 6916 Phone: (08) 9228 4222 Fax: (08) 9228 4233 Email: [email protected] 9C Piermark Drive Albany 0752 New Zealand PO Box 300-512 Albany 0752 Phone: (09) 415 9426 Fax: (09) 415 9864 Email: [email protected] EUROPE / ASIA / MIDDLE EAST w w w. a u s t r a l i a n m o n i t o r. c o m . a u INTERNATIONAL SALES 1 Clyde Street Silverwater NSW 2128 Australia Private Bag 149 Silverwater NSW 1811 Phone: (02) 9647 1411 Fax: (02) 9648 3698 Email: [email protected] AMIS60/120 Product Description The AMIS60 and AMIS120 mixer amplifiers are designed for commercial installations. Both models operate on [230/240 VAC, 50Hz] (240V version)/[115VAC, 60Hz] (115V version) or 24 VDC, and may be desk or rack mounted (rack mount kit supplied fitted). Both amplifiers incorporate a 6 zone 100 volt line speaker zone selector with “All Call”. The AMIS60 will deliver 60 watts into a load of 8 ohms, 70 volt or 100 volt line. The AMIS120 will deliver 120 watts into a load of 4 or 8 ohms, [70 volt or 100 volt line] (240V version)/[70 volt or 25 volt line] (115V version). Both Models feature 4 universal mic/line inputs, and an insert point for additional EQ or feedback exterminator if required. The AMIS60/120 also feature a dual RCA tape output while a balanced, 700mV XLR output is also provided to feed up to six power amplifiers. Other standard features include on-board Bell, Pre Announce, Alert & Evac tones, Remote Master VCA Control & dual stage priority muting. As standard, both models are self standing and come with rubber feet. They may be stacked to a maximum of four units high. [The 115V version also has a transformer balanced, 600 ohm telephone input] (115V version). AC Power Inlet The 3 pin IEC power inlet is located on the bottom left of the rear panel and accepts a standard mains power lead fitted with an IEC connector. Before plugging in a power lead, please check the rear panel of the amplifier to ensure that the voltage switch is set correctly for your part of the world. The operating voltage is [230/240 VAC @ 50 Hz] (240V version)/[115 VAC @ 60 Hz] (115V version). (240V version) [The inlet is equipped with an inbuilt AC fuse holder fitted with a 4 amp fuse (ACM120) or a 2 amp fuse (ACM60) plus a spare within the holder]. (115V version) [The inlet is equipped with an inbuilt AC fuse holder fitted with an 8 amp fuse (AMIS120) or a 4 amp fuse (AMIS60) plus a spare within the holder]. Power consumption is approximately 125 VA for the AMIS60 and 250VA for the AMIS120. 24 Volt DC Power Inlet The AMIS60 & AMIS120 feature optional 24VDC power to run off a battery supply if required. This is connected via the rear terminal strip. The front panel Power Switch will not switch DC power ‘on’ or ‘off’ in DC operation. In this mode the amplifier is always ‘on’. There is no trickle charge resistor across the diode (one diode of a bridge rectifier). [230V/240V Slide Switch] (240V version) The operating voltage of the amplifier is user selectable between 230V and 240V via a slide switch located on the top left side of the rear panel. This switch should be set to match the AC voltage of your country. The mains transformer is wound with a 230V winding plus a 10V winding internally connected. Power Amp The power amp is a push pull single supply amplifier driving a centre tapped transformer. The amplifier has an overall gain of approximately x10 and the transformer has a turns ratio of approximately [x7] (240V version)/[x5] (115V version). The sensitivity of the amp is approximately 2.7V. A particularly good aspect of this amplifier is the current limiting circuit. The sensing circuit is a standard rail load line limiting circuit but it is the drive circuit that is important. As transistors V12 & V14 (BC640) turn on transistor V11 (BC639), it pulls bias current away from the amp through diodes D1 & D4 (BAV21) and pulls drive away from the op amp IC1 (LM1458) through the diode/resistor pair D2/R12 (BAV21/2k2) & D3/R23. Individually each topology acts to limit the current in the amp but it is the combination of the two and the fine tuning of there interaction that produces the characteristic soft limiting without the harsh crossover distortion. It is not until the amp is in hard clip does the amp produce the high freq crossover distortion. This makes for nice sounding current limit that allows for soft distorted peaks to get through but limits continuous excessive current while maintaining thermal stability. Speaker Output Terminal Strip (240V version) The screw terminals on the left hand side of the strip allow access to the direct speaker outputs of the amplifier. Reading from left to right the terminals are: COM 4 8 Common or “-” for low impedance speaker loads (4 or 8 ohms). Positive “+” for 4 ohm speaker loads (use with common) (AMIS120 only) Positive “+” for 8 ohm speaker loads (use with common) COM Common or “-” for 70v or100v speaker loads (maximum load of 80 ohms at 100v AMIS120 & 160 Ohms at 100v AMIS60) Positive “+” for 70v line speaker loads (use with common) Positive “+” for 100v line speaker loads (use with common) 70 100 Please ensure that the correct “Common” is used. Low impedance and 70/100v loads can be used simultaneously but please pay careful attention to the overall speaker load. Note: The minimum impedance (or maximum load) at 100 volt line should be no less than 80 Ohms for the ACM120 and no less than 160 Ohms for the AMIS60. (115V version) The screw terminals on the left hand side of the strip allow access to the direct speaker outputs of the amplifier. Reading from left to right the terminals are: COM 4 8 Common or “-” for low impedance speaker loads (4 or 8 ohms). Positive “+” for 4 ohm speaker loads (use with common) (AMIS120 only) Positive “+” for 8 ohm speaker loads (use with common) COM Common or “-” for 25v or 70v speaker loads (maximum load of 40 ohms at 70v AMIS120 & 80 Ohms at 70v AMIS60) Positive “+” for 25v line speaker loads (use with common) Positive “+” for 70v line speaker loads (use with common) 25 70 Please ensure that the correct “Common” is used. Low impedance and 25/70v loads can be used simultaneously but please pay careful attention to the overall speaker load. Note: The minimum impedance (or maximum load) at 70 volt line should be no less than 40 Ohms for the ACM120 and no less than 80 Ohms for the AMIS60. Terminal Strip The remaining terminals read as: Spare Tone Generator Common (use with one of the 4 tones listed below) Pre-Announce Chime Alert Tone Bell Chime Evacuation Tone 24 volt DC Vox Relay Out VCA [600 Ohm Telephone Input] (115V version) Phantom Power Button This button enables or disables the 15 volts DC phantom power to all microphone XLRs. Do not plug an unbalanced microphone in to any amplifier or mixer when phantom power is switched ‘on’. The phantom voltage is connected through 4k7 1/4W resistors. The maximum current draw available per microphone is approximately 3mA. Line Output The balanced XLR line level output provides a maximum of 700mV to allow for the connection of up to 6 power amplifiers. Pin connections are: pin 1-earth; pin 2-signal (hot +); pin 3-signal (cold -). The output is electronically balanced with an inverting op-amp and buffered with voltage follower op amps. Neither hot nor cold output should be grounded when connecting as unbalanced. Tape Output Dual RCA output connectors provide a line level output with a maximum of 350mV into 10k Ohms. This output is sourced before the master gain control so the tape output level is not influenced by the operation of the master gain control. Microphone Inputs All six inputs are dual mic/line with microphone inputs being via a 3 pin XLR connector per channel. The mic input sensitivity is 1mV @ 200 ohms. Pin connections are: pin 1-earth; pin 2-signal (hot +); pin 3signal (cold -). Phantom power of +15 volts is available on all microphone inputs. Reading from left to right across the rear panel, the inputs are 4, 3, 2, & 1. Line Inputs All four inputs are dual mic/line with line/auxiliary inputs being via dual RCA connectors per channel. Line inputs 1, 2 & 3 have an input sensitivity of 150mV @ 100K ohms. Input 4 has an input sensitivity of 300mV @ 220K ohms making it suitable for high level inputs such as a CD player. Reading from left to right across the rear panel, the inputs are 4, 3, 2, & 1. [600 Ohm Telephone Input] (115V version) The 600 ohm transformer balanced Telephone Input is summed with input 2 through 100k ohms. The input sensitivity is 150mV (driving the amp to full power) When an external processor is used via the insert point, it only affects the power amplifier section and line output of the AMIS60 &AMIS120. The tape output remains unprocessed. VOX Relay Output The terminal strip to the immediate right of the AC inlet features a relay output. This relay is deactivated when signal becomes present at any of the priority inputs. This would normally be inputs 1 and 2; however these channels can be removed from the priority bus via internal links. The unit is shipped from the factory with inputs 1 and 2 having priority. The emergency tones also deactivate the relay. The relay can also be removed from the priority bus allowing muting to occur without operation of the relay. The relay outputs are C (Common), NO (Normally Open) and NC (Normally Closed). The NO or NC selection provides the installer with the option of the relay either opening or closing a contact. This feature is normally used in conjunction with relay override attenuators (volume controls). In this application, the relay output could trigger an accessory power supply which in turn bypasses the remote attenuators. The result is that priority inputs will always be heard irrespective of the attenuator setting. The relay contacts are 3 amps at 125VAC/30VDC. The relay outputs are marked in the fail safe position, i.e. power off. When power is applied and no signal is present the relay energizes through transistor V3 (BC546). This transistor is turned on by IC5B (LM358 or equivalent). This output is normally high. Switch on and switch off times are controlled by the time constants of the RC network of C21 and R77. The switch off time is determined by the current sinking capabilities of the LM358 through diode D4 (BAV21 or equivalent). This time can be considered instant. The on time is determined by the charge time of C21 (22uF) through R77 (22k). This is approximately 2 seconds. It must be remember that the relay circuit is designed to be fail safe so that when power is on the relay is on and therefore the relay must turn off quickly (when priority is on) and on slowly (when priority is off). This is to avoid chatter of the relay. VCA Control An external pot (500K) can be connected to the AMIS60/120 for remote control of the master level. The external pot is governed by the master level of the amplifier allowing the installer to set the volume, then lock the amplifier in a rack, leaving the user with just a master volume control that cannot go beyond the level set on the master (front panel) control. Connection is via a 2 wire terminal strip on the rear panel of the amplifier. Shorting this input will mute the amp. The VCA IC has a Voltage/Gain ratio of approximately -3mV/dB. That is a voltage difference of approximately 300mV below the reference voltage (pin3, ~7.5V) will provide full mute (-80dB). The need to have the remote pot on two wire connection means that there is a small amount of attenuation (approx 1dB) when the pot is connected. For the best audio control a log pot should be used. The control circuitry is a DC attenuator and an inverter. When a pot is connected, the current through R64 (10k) and the pot resistance generated from the 1/2Vcc bias voltage flows through R76 (330R). This generates a voltage increase on the output if op amp IC7B (LM1458 or equivalent) above the reference voltage (1/2Vcc). The second op amp IC7A (LM1458 or equivalent) inverts this voltage to a voltage difference below the reference voltage. Thus if the pot is turned to S/C the voltage difference below the reference voltage is: 7.5(V) / 10(kohm) * 330(ohm) = 248(mV) = 248(mV) / -3(mV/dB) = -82(dB) From this you can see that when a 500k pot is attached the initial attenuation is: 7.5(V) / 510(kohm) * 330(ohm) = 4.85(mV) = 4.85(mV) / -3(mV/dB) = -1.62(dB) These calculations are only approximate and are used to show operation of the circuit. Tone Generators Four separate tones are available from the in-built tone generator board. All four tones can be activated individually via a contact closure connected to the screw terminals on the rear of the amplifier. When any tone is activated, all inputs (except for inputs 1 and 2) will automatically mute. The level of the tone generator is controlled by the pot labelled R6 (located behind the Bass adjustment pot). This pot adjusts the level for all 4 tones. Tones available on the AMIS60 and AMIS120 include: - Evacuation Tone - Alert Tone - Bell Tone - Pre-Announce Chime Theses inputs are pulled up to 5VDC internally through 1k resistors. The tones are generated through a combination of digital frequency modulation and analogue amplitude modulation. The output of the microcontroller IC13 (PIC16C54A) on pin 17 is a 0-5V square wave of varying frequency (depending on the tone selected). This signal is amplitude modulated using a VCA IC8 (M5222P). The envelope is controlled by the charging and discharging of the electrolytic capacitor C47 with the sink and sourcing of current on the microcontroller outputs pins 1, 2 & 13. Page Chime Enable Button This allows the user to disable or enable the Pre-Announce Chime. This switch does not activate the chime. Activation is accomplished via the rear panel barrier strip (normally wired to a paging microphone). If the pre-announce chime is connected to a paging microphone (meaning that it would be activated by the switch on the microphone), the Page Chime Enable switch on the front panel of the amplifier allows the user to disable the chime function on those occasions when it is not require. VOX Muting This feature provides automatic muting channels 3 & 4 when signal is applied to either channels 1 or 2. It is normally used so that a paging microphone can have priority (by muting) over background music. The muted channels will automatically ramp back up to normal volume when the signal on channels 1 and/or 2 is no longer active. The amplifier ships with the VOX muting function enabled. To disable the VOX muting move the jumper (labelled JP2, located just to the left and behind the level pot for channel 1) to the middle and left pins. (Factory setting is with VOX enabled with the jumper on the middle and right pins). Channels 3 & 4 are summed through IC1B (LM1458 or equivalent) to the VCA IC4 (THAT2180C) which does the muting. The VCA is held on (i.e. no attenuation) by R55 (10k) pulled to the reference voltage and the reverse biasing of diode D3 (BAV21 or equivalent) by R22 and R21. This is to eliminate any attenuation by the op amp IC1A (LM1458 or equivalent) and its ½ supply which may be different to the internal reference voltage of the VCA. The control pin of the VCA is pulled down by op amp IC1A. This op amp runs at very high gain to activate on even very small signal. The jumper JP3 shorts out the feedback resistor thus removing the sensitivity. The attack of the muting circuit is controlled by the charging of C16 (100uF) through R16 (100k) and the release by the discharge if C16 through D1. Note that VCA will mute at 250mV (-80dB) below the reference voltage so the muting will occur only over the range of approximately (depends on VCA production batch) 7.2V to 7.5V. The charging of the capacitor occurs from approximately 1V to 8.1V. VCA THAT2180C pin out 1 – Input 2 – Ec+ 3 – Ec4 – Gnd 5 – V6 – Ground 7 – V+ 8 - Output Fuse Sizes (240V version) Mains AMIS60, 230 VAC: 2 Amperes Slow Blow Mains AMIS120, 230 VAC: 3.15 Amperes Slow Blow (115V version) Mains AMIS60, 115 VAC: 3.15 Amperes Slow Blow Mains AMIS120, 115 VAC: 4 Amperes Slow Blow The DC fuse is located on the circuit board. This is a feature of the AMIS series amplifiers, which are equipped with a current limiting circuit preventing excessive DC currents, thus eliminating the risk of blowing high tension fuses. In the unlikely event that the DC fuse actuates, the output transistors should be checked, as it is probable that the amplifier has been subjected to very extreme conditions. The DC fuses are 10A time lag fuses. 1 2 R38 100k D R3 100k RCA1B CH1 C1 4u7 3 4 5 R5 R11 100k 22K C5 R39 100k RCA1A CH2 C9 4u7 C2 R29 4k7 R30 4k7 R14 680R IC1B LM1458 Vcc1 R27 C10 4u7 R8 4k7 C33 .1u C12 4u7 1 C11 R7 4k7 D CH1 CH2 3 CH2 IC1A LM1458 CH3 CH4 R10 22K C8 100P P/Power C26 4u7 Vcc1 4u7 Vcc 10R R6 22K C6 100P C25 4u7 2 XLR2 CH2 CH1 5 4u7 Vcc REC OUT 8 8 C4 4u7 7 4 R1 680R Vcc 1 100P R13 680R Vcc1 6 XLR1 CH1 X1 8 C7 4 C3 4u7 7 R9 22K 100P R2 680R 6 CH5 CH6 P/Power MIX OUT+ MIX OUT- HEADER12 C14 4u7 22K C18 R4 100k RCA2A CH4 C22 4u7 8 C16 4u7 7 R24 R23 4k7 4k7 R42 4 Vcc2 C24 4u7 C21 4u7 1 R26 4k7 C34 .1u R25 4k7 P/Power C30 4u7 CH4 3 R34 IC2A LM1458 MIX OUT- Vcc 10R R18 22K C17 100P R22 680R IC2B LM1458 Vcc2 C23 4u7 2 XLR4 CH4 CH3 5 4u7 XLR7 OUTPUT Vcc3 4 C13 4 R16 680R C 1 100P R21 680R Vcc2 6 XLR3 CH3 IC3A C29 LM1458 4u7 2 R36 47k 8 C15 4u7 3 1k C19 100P R15 680R MIX OUT+ 8 R17 100k RCA2B CH3 R12 C27 4u7 R33 R20 22K R41 100k 4 R40 100k 5 6 R35 47k R19 22K C20 100P IC3B C28 LM1458 4u7 7 1k 8 C Vcc3 Vcc R37 P/Power B RCA4 REC OUT R32 REC OUT R50 100k R51 100k RCA3B CH5 C35 4u7 22K C43 C36 4u7 Vcc4 R53 100k RCA3A CH6 10k C39 4u7 C46 100P 100P C37 4u7 6 7 C38 5 4u7 R28 4k7 R43 4k7 R58 R47 22K C44 100P R57 680R IC4B LM1458 Vcc4 C41 4u7 3 SW1A CH6 10R R44 4k7 C47 .1u R45 4k7 Vcc D1 2 C32 4u7 DPDT SWITCH 1N4004 6 4 R49 22K C45 100P 1 3 P/Power IC4A LM1458 SW1B 5 DPDT SWITCH P/Power A REV A B C D E F 1 C42 4u7 1 Vcc P/Power A Vcc4 2 XLR6 CH6 CH5 C40 4u7 4 R55 680R 4 XLR5 CH5 R56 680R 8 8 R54 680R 2 B 10k R31 R48 22K R52 100k R46 Vcc3 10RC31 4u7 3 4 DRN REVISION NOTE: Changed to 6 channels CKW AU675$/,$1021,725 DATE 09/03/07 DRAWING No: CD6235-1 DESCRIPTION: AMIS120/60 INPUT DATE: 10-Feb-2010 5 6 DRAWN BY: 7 SHEET 1 8 of 1 XLR1 XLR3 XLR2 RCA1 J27 XLR4 RCA2 RCA3 XLR5 XLR6 J25 X3 RCA4 J33 C28 XLR7 C29 SW1 J20 J8 J2 J32 J7 J1 C31 C1 C2 J4 C4 C15 J18 C11 C14 C16 J36 C21 J9 C22 C23 C24 6368-D C36 C35 C37 J12 J37 J21 C39 C40 C27 C32 C41 J17 X1 AMIS 60/120 (6 CH) INPUT-SMD-0794-00-00 LEGEND LAYER - - C42 J35 J10 J11 C30 J39 J24 J3 C3 J16 J28 J31 C38 C13 J19 J38 C10 J15 J29 J6 C12 C9 J5 C25 J30 X2 C26 - BREAK WAY AFTER FLOW SOLDRING IC1 R1 R30 R29 R3 R38 C5 R5 C6 R6 R9 R10 C8 R11 R39 R13 R7 R14 C17 R18 R12 C18 R40 R15 R24 R23 R16 C33 R55 R22 R26 R21 R4 R41 C20 R20 C19 C34 R28 R54 R50 R46 C43 C44 R47 R48 C46 C47 R17 R2 C7 R42 R8 IC2 R19 R25 IC4 R49 R45 R33 R43 R44 R56 R53 R52 C45 R57 IC3 R32 R31 R51 R58 R35 R37 R36 D1 R34 BOTTOM OVERLAY R27 - BREAK WAY AFTER FLOW SOLDRING 3 5 R8 10k R2 LM1458 C6 IC1B 2n7 R29 C45 6K8 50k 4u7 JP3 MUTE R34 C2 33P 50k LM1458 R50 3 P3 IC1A 120k LM1458 10k C16 1N4148 THAT2180 Vcc C3 R13 1 R12 P9 50k 35V IN 7 4u7 5 R15 4 2 R24 220K LM1458 10k Q2 BC846A R18 22k RN5 R19 47K R45 C33 R53 10u 4K7 Vcc D6 RELAY ENABLEBZX85C8V2 BC846A .1u IC9 D5 Vin 1 35V IN C5 470u 100u 100k 1N4148 R46 PIC16F818 C32 R54 22u LM7815 Vout 3 D3 1N4004 C27 IC11 Vcc Q1 10k C4 1k 1R47 22k 3 1 10k JP1 2 Vcc R25 .1u Vcc LM1458 IC2A P10 50k .1u IC4A 8 R59 C43 RY1 1 LM1458 C44 10u 3 IC2B 10k 2 C34 2K2 100k 4K7 LM1458 3 1 220R 5 6 C15 C R58 R49 10k R14 35V IN Vcc To Power Amp 1k R21 6 To PWR LED LM1458 X5 IC8A 8 C14 X2 LM1458 8 100k Vcc 470R X6 1 2 3 33P 50k 1 IC7A 2 P4 10k 1 MIX OUT+ 4u7 R52 4 R57 R6 IC6A IC3 C Vdd 10k 2 R51 10k 3 1 10R D2 100u 8 R9 R17 4 50k R43 C20 1k 7 4 10k 1N4148 4 R5 MIX OUT- 3 8 8 D1 1 2 820R Vcc 100k R41 10k Vcc 4u7 4u7 10k 1R56 100R D R39 R48 R16 2 8 C47 C28 R32 MIX OUT4u7 47P LM1458 IC4B Vcc C26 1k C22 IC6B P7 5 R11 1M Vcc MIX OUT+ 10k R42 10k 4u7 R44 2K2 7R26 100R R38 C18 7 1 1k 2180C 8 6 6 D7 BZX85C4V7 R4 10k 7 100P Vcc 10k IC5 5 50k P2 5 R40 8 R3 1 2 3 4u7 C9 6K8 P5 1k REC OUT 22k R27 C17 4u7 GND X1 R33 10k 22k Vcc Vcc 4u7 R35 LM1458 6 4 10k R36 8 7 4u7 10k C7 47P 8 50k R31 6 IC7B 33K Vcc C19 8 1 P1 C10 R30 10k 8 C11 R1 50k R28 100R 4 D P6 R10 Vcc 10u R37 10k 4 10u C37 8 .033u 4u7 100k C36 7 47P C12 R7 10R 7 4 R22 6 C21 4 10R 5 C8 4 33P R20 4 REC OUT 4 C1 4 2 Vcc 5 6 1 100k RA1 18 2 RA3 RA0 17 Evac 3 RA4/T0CKI OSC1/CLKI 16 Bell 4 ~MCLR OSC2/CLKO 15 Alert 5 Vss Vdd 14 Chime 6 RB0/INT RB7 13 7 RB1 RB6 12 8 RB2 RB5 11 9 RB3 RB4 10 RN1E Vdd 10u 1 R55 C35 100R Vcc 10u 2 .1u Vdd X9313 1 7 RN4D 1k RN4C 1k RN4B 5 ~INC 6 ~CS Vcc IC8B 3 U/~D C25 0.47u 4 2 1k Vin C24 IC10 RN4E 1k LM78L05 Vout C31 Vdd B IC12 Vdd 3 LM1458 5 7 6 1k C30 4u7 Vcc 4 1k 1N4148 8 RN1D D4 GND RA2 8 1 1 Vcc Vdd X3 Vss B P8 10k C42 C41 C40 C39 C38 .1u .1u .1u .1u .1u R22A 100k R23 RN1C 1k RN2E RN2D RN3E 1k 1k RN3D 1k RN3B 1k 100k RN4A 1k C29 1k RN1B A 1k RN2C RN3C 1k 1k RN2B 1k RN2A RN3A 1k 1k 1k 2 47n 4u7 REV A B C D E F RN1A 1 C23 3 4 A N O P Q R S REVISION NOTE: Changed to 6 channels, removed insert pt Fixed errors on PCB and CD (PCB rev-I and CD rev-N not in prod) DRN CKW CKW DATE 09/03/07 01/08/07 AUSTRALIAN MONITOR DRAWING No: CD6300-1 DESCRIPTION: AMIS120/60 MIXER DATE: 28-Jan-2010 5 6 DRAWN BY: 7 SHEET 1 8 of 1 + + C16 + + 2180C C15 P3 + J42 P8 P4 J44 P9 J39 C7 + J3 + + + J11 C45 J43 C11 J23 J22 IC5 J24 J25 P6 C19 C30 X3 ALR BLL EVC GND CHM RN4 J46 C47 + P2 C18 + J8 IC9 C33 J31 J26 J17 + J9 P1 J13 + J41 J34 J33 J32 AMIS 60/120 MIXER-SMD-0622-01 J6 J7 J37 J38 J2 J30 C28 J18 J19 6300-I + J4 J5 J1 C17 VOX Relay VCA&RLY J14 2180C C14 RN1 IC10 C32 J20 C12 Vox Mute Enable C34 + C5 J15 C35 P5 J21 RN5 P8 P7 X6 J10 + RN2 RN3 Enabled IC11 C29 RY1 X5 IC12 J29 C27 + CON3 J45 J35 J28 JP1A + J36 IC3 C31 HS1 X2 J40 J27 J12 + + J16 + C26 X1 + C20 + C37 + + C36 R57 R1 C6 R36 R28 R29 R27 R53 C8 C21 IC4 R30 R31 R22A R37 C40 R33 R59 R12 R6 R5 D4 R45 R35 C10 R44 IC6 C4 C43 R32 C41 C42 R23 Q2 R56 C22 R39 R52 R55 R24 C1 C38 R8 R11 R13 C3 IC2 C2 R20 R22 R9 IC1 R15 R42 C23 R46 R47 R19 D7 R4 R3 R14 C39 R43 C25 R25 C9 IC7 IC8 R21 R54 R26 R38 R40 R58 AMIS 60/120 MIXER-SMD-0622-01 D3 R34 C24 R10 Q1 D6 R7 R2 R18 R49 C46 R41 R48 R51 R50 R17 D2 D5 R16 C44 D1 1 2 3 V4 BD139 24V FAN R48 6K8 C23 100u LM358 IC5B R40 2K2 D R52 100K 4 R49 330R 2W R50 1K5 6 7 8 D15 = 20V for AMIS1202P +12V 35VDC D15 20V LM358 IC5A R51 1K2 R33 R42 0R22 Temp Cut out D16 R14 1K R53 100K D14 R19 100R V12 TIP36C TIP36C R24 V13 1K1 V11 TIP42C D5 2V7 IC2A NE5532 1N4148 .1u D R25 1K V6 BC640 V14 TIP36C V10 BC639 R10 1K 3 C29 R43 0R22 B 10K R31 10K NTC C12 47u R41 0R22 R32 10K 1N4148 5 D15 = 20V for AMIS120 +35V 1 BC639 V7 2 -12V 4 X1/16 C 2 10K INPUT C2 .47uF VR1 2K R28 1K TEMP CUTOUT R3 R9 470R -12V C9 .1uF V1 BD139 10K R5 10K R4 4K7 D1 LK6 R12 470R VCC R6 8 10K 6 C4 100P -12V R35 470k C16 47u C17 47u RY1 X1/14 6K8 LK9 X1/12 100 V to Barrier strip R29 1K R22 VR2 2K C5 100P X1/11 100 V in from XF X1/13 C15 22P X1/10 Com from XF 100V D4 IN4004 X1/9 Com from XF 4/8 ohm 100K R21 150R X1/8 Com out to Barrier strip C10 470pF 8 V15 BC639 6 B 7 IC2B NE5532 V9 BC639 V16 TIP42C R13 1K 5 1K R20 PRE AMP V17 TIP36C V18 TIP36C LK7 V19 TIP36C R26 1K1 R27 1K R23 100R R45 0R22 C6 +35VDC B V8 BC640 LK7 B1 R46 0R22 R47 0R22 220u F1 10 S/B T1 X1 CX2 240VAC 22N/400V CX1 5 4 .22u 3 A 2 35VDC D17 R36 15R 2W 6 1N4004 IC3 LM7812 LK1 VCC IC4 LM2594-5V D9 1N5818 7 LK2 VCC 5 R39 6 C18 4700uF 1 C19 4700uF C20 220u LK6 C25 220u C21 220u D10 1N5818 4 C22 .1u C26 47uF 10R C28 100n 8 Rev D Delete C11,C13 A Rev E Title Size A3 Date: File: 3 Changed IC4 R27 changed to D17 R36 changed CH1 1 2 3 2 Rev C -12VDC C27 47uF R38 15K NOT ON PCB 1 X1/7 Com out to Barrier strip X1/15 VCC B2 X1/8 X1/7 R11 F2 S1 3.15 A S/B C X1/9 D8 1N4004 4K7 V2 BD139 7 LM1458 IC1B 24VDC X1/11 .1u D2 IN4004 5 R7 10K V3 BC639 B 4K7 R18 IN4004 RX1 X1/10 R30 2K2 R17 X1/12 CX3 10R 5W V5 BC639 3 4 TO 24VAC POWER TR R34 22K R16 6K8 1 LK10 D6 1N4004 C14 22P C3 100P 4K7 IC1A LM1458 X2 +BAT TERMINAL D3 IN4004 R2 C1 .47uF R1 D7 1N4004 C8 470pF R15 150R 100K R8 4 5 6 AMIS 120 POWER AMP Revision CD6338-2 E Number 18-Jan-2007 C:\ATC\AMIS120\AMIS120-60.DDB 7 Sheet of Drawn By: 2 of 2 RS 8 + + C20 R6 C1 Bal Input R4 R1 R5 16 15 14 13 12 11 10 R27 D12 - D11 + C19 INSTALLATION SERIES R49 D13 COM OUT COM OUT 24VAC 24VAC OR 35VDC D4 LK2 R7 R9 COM XF 4/8 OHM + BAT GND-CT POWER TRANSFORMER GND-CT D17 C29 C23 C25 + + C2 R2 + + V4 R36 CX2 R3 + R40 C22 + IC3 C27 Fan C6 V8 V9 R12 C4 9 C10 IC1 LK10 D9 COM XF 100V 7 + V3 C21 100V XF R29 LK6 C18 LK1 6338-F 1 C12 + R8 R39 R48 R50 R10 C3 IC4 100V out X2 R38 RY1 + R28 D10 GND-CT 8 R31 R20 V15 VR2 C28 IC2 R11 LK9 R13 C5 VR1 IC5 R51 R17 C26 V10 CH1 R30 GND-CT C17 R18 D1 C14 D14 R53 D5 RX1 D15 D3 R14 LK4 LK3 R26 R23 R22 CX3 R24 R32 D16 R52 R33 R25 F1 6 D2 R21 R15 R47 5 R16 C8 R46 4 R19 R45 V16 3 C9 V11 TRANSFORMER OUTPUT 2 R41 R42 V19 V18 C16 V17 C15 R43 V12 + V6 OUTPUT V2 + V13 V14 V7 R34 R35 V5 D8 D7 D6 V1 X1 GND-BAT Australian Monitor Service Bulletin AMIS120 Zener diode problem 18 August 2009 We have encountered a higher than acceptable failure rate of zener diode circuit reference D15 in AMIS120 amplifiers. The Zener diode is part of the thermal protection circuit in the amplifier and in time may go short circuit and cause the amplifier to mute all audio. The problem occurs after the amplifier has been in use for many months and appears to be caused by excessive current dissipation in the diode caused by higher than expected low fan speed running current draw. Airway obstruction, dust build up on the rotor blades or in the bearings may cause the fan to run below speed and draw enough current to cause thermal degradation to the diode over time. This problem is limited to AMIS120 amplifiers manufactured between April 2008 to July 2009. The solution is to replace the 15 volt 1 watt zener diode with a 20 volt 1.3 watt or higher (two 1.0 watt or similar) zener diodes. The diode should also be raised 5.0mm above the board for improved heat dissipation Original diode 15V 1W zener. Replace with 20V 1.3W or 2 of 1W. page 1 of 2 AMIS120 Zener diode problem 1 2 R48 6K8 C23 100u LM358 IC5B R40 2K2 D R52 100K R50 1K5 5 R32 10K 10K 35VDC C12 47u B Temp Cut out D5 2V7 R14 1K R53 100K D14 R19 100R INPUT 2 C2 .47uF LK10 4 R3 6 R6 8 10K R9 470R R12 470R C4 100P 5 R22 X1/13 C15 22P R21 150R 8 B2 CX2 22N/400V CX1 F1 10 S/B 5 4 .22u 3 A 2 V16 TIP42C V18 TIP36C V17 TIP36C V19 TIP36C R26 1K1 LK7 R23 100R R45 0R22 1N4004 LK1 VCC R46 0R22 C18 C19 4700uF C20 220u LK6 7 C25 220u C21 220u C22 .1u 5 D4 IN4004 X1/10 Com from XF 100V X1/11 100 V in from XF X1/9 Com from XF 4/8 ohm R39 6 D10 1N5818 4 8 C26 47uF 10R B R27 1K C28 100n Rev C Changed IC4 R27 changed to D17 Rev D Delete C11,C13 -12VDC A C27 47uF CH1 Rev E R36 changed Title 1 2 3 Size A3 D ate: File: 2 X1/7 Com out to Barrier strip V8 BC640 VCC R38 15K NOT ON PCB 1 X1/7 R47 0R22 IC4 LM2594-5V D9 1N5818 4700uF X1/8 35VDC IC3 LM7812 LK2 1 C X1/10 X1/8 Com out to Barrier strip C6 D17 R36 15R 2W 6 X1/11 X1/9 X1/12 100 V to Barrier strip 220u 240VAC RY1 X1/12 V9 BC639 LK7 1K R20 X1 .1u R29 1K X1/15 R13 1K IC2B NE5532 +35VDC T1 RX1 D8 1N4004 C10 470pF V15 BC639 7 PRE AMP F2 S1 3.15 A S/B C17 47u R11 B1 24VDC CX3 10R 5W R35 470k C16 47u TO 24VAC POWER TR X1/14 VCC 6 -12V 6K8 VR2 2K C5 100P B B V3 BC639 +BAT TERMINAL V5 BC639 4K7 V2 BD139 100K R30 2K2 X2 D2 IN4004 LK9 LM1458 IC1B R7 10K 4K7 R18 IN4004 D1 LK6 R34 22K TEMP CUTOUT R17 D7 1N4004 D6 1N4004 R28 1K R16 6K8 C9 .1uF V1 BD139 7 5 V6 BC640 D3 IN4004 C14 22P VR1 2K R5 10K VCC D R25 1K X1/16 10K R4 4K7 1K1 C8 470pF R15 150R C3 100P -12V R24 V13 BC639 V7 1 3 TIP36C V14 TIP36C R2 C1 .47uF R1 V12 TIP36C .1u -12V 4 100K R8 4K7 IC1A LM1458 R42 0R22 V10 BC639 R10 1K 1 C29 R43 0R22 R41 0R22 V11 TIP42C IC2A NE5532 1N4148 3 10K 8 D15 = 20V for AMIS1202P D15 20V LM358 IC5A 2 C 7 6 D15 = 15V for AMIS120 +12V R51 1K2 R33 R31 10K NTC +35V R49 330R 2W D16 1N4148 4 3 V4 BD139 24V FAN 3 4 5 6 AMIS 120 POWER AMP N umber R evi si on CD6338-2 E 18-Jan-2007 C:\ATC\AMIS120\AMIS120-60.DDB 7 S heet of Drawn By: 2 of 2 RS 8 page 2 of 2 ENGINEERED BY AUSTRALIAN MONITOR. DISTRIBUTED BY HILLS SVL ABN 78 001 345 482 Address: 1 Clyde Street, Silverwater, Sydney NSW 2128 Australia Website: www.australianmonitor.com.au International enquiries email: [email protected] NSW Phone: (02) 9647 1411 Email: [email protected] ACT Phone: (02) 6260 4544 Email: [email protected] QLD Phone: (07) 3852 1312 Email: [email protected] WA Phone: (08) 9204 0200 Email: [email protected] NZ Phone: (09) 415 9426 Email: [email protected] VIC Phone: (03) 9890 7477 Email: [email protected] SA Phone: (08) 8352 4444 Email: [email protected] Australian Monitor Service Bulletin AMIS Mixer Amplifiers AMIS Booster Amplifier Start-Up Issues in Extreme Cold Conditions 12 March 2012 Applicable Models This bulletin applies to the AMIS250 and AMIS250P models, and older versions of the AMIS60, AMIS120, AMIS120P, AMIS120XL, AMIS1202P and AMIS480P models. For Information Only This bulletin is intended for service technicians only and is to be applied when presented with models exhibiting the issue identified below. Known Issue In extreme cold conditions the models listed may not operate when turned on. A small number of reported instances have been recorded in regions of extreme cold, typically when the unit temperature is less than 10ºC. In some instances, the failure to start can lead to failure of the main bridge rectifier also. This issue is limited to AMIS products using the Maxim MAX765CPA inverter IC. The range of AMIS60 and AMIS120 models stopped using this part several years ago so this issue is limited to the older models. Identification If you have one of the models listed above that has presented with the described issue then inspect the part fitted (IC4) on the main amplifier board. If this part is a MAX765CPA then the cold start issue may be resolved by replacing this part with a MAX765EPA part. Later models are fitted with an LM2594 part that does not exhibit cold start issues. Solution An alternate part is available with wider operating temperature specifications. The alternate part MAX765EPA is fully compatible with the original part MAX765CPA and may be exchanged if required. Replacement Wide Temperature Range Component Temp. Range Package Maxim Part Mouser Digikey -40º to +85 º C DIP8 MAX765EPA 700-MAX765EPA MAX765EPA+-ND Notes The MAX765 and LM2594 parts are not directly interchangeable. Page 1 of 1 Australian Monitor Service Bulletin AMIS120 Mixer Amplifier AMIS120XL Mixer Amplifier AMIS120P Booster Amplifier AMIS1202P Booster Amplifier 12V Regulator Capacitors 13 March 2012 Applicable Models This bulletin applies to AMIS120, AMIS120P, AMIS120XL and AMIS1202P models manufactured prior to March 2012. For Information Only This bulletin is intended for service technicians only and is to be applied when repairing failed amplifiers. This bulletin does not apply to functional units. Known Issue A larger than expected number of failures have been observed once these models have been in service for a number of years, due to the failure of a number of electrolytic capacitors in the negative 12V power supply inverter. When the negative inverter circuit falls out of specification the amplifier may exhibit a large DC offsets at turn on, resulting in failure of the main AC bridge rectifier. Solution Replacement of the electrolytic capacitors in the negative 12V inverter section with higher operating temperature low impedance parts is recommended in the interest of longevity and reliable operation. Replace the critical components as per the table below. Designators C20, C21, C25 C26, C27 Value Voltage Recommended Part Temperature Rating Special Attributes Panasonic Element14 220uF 35V 105ºC Low ESR EEUFC1V221 9692282 47uF 35V 105ºC Low ESR EEUFC1V470 1848447 Notes All models manufactured March 2012 or later are fitted with higher specification parts and should therefore provide improved longevity and reliability. The Panasonic parts recommended may be substituted with other brand components of similar specification. Page 1 of 1 Australian Monitor Service Bulletin AMIS120 Mixer Amplifier AMIS120XL Mixer Amplifier AMIS120P Booster Amplifier AMIS1202P Booster Amplifier Bridge Rectifier Upgrade 13 March 2012 Applicable Models This bulletin applies to AMIS120, AMIS120P, AMIS120XL and AMIS1202P models manufactured prior to March 2012. For Information Only This bulletin is intended for service technicians only and is to be applied when replacing failed bridge rectifiers. This bulletin does not apply to functional units. Known Issue A small number of bridge rectifier failures at power on have been observed. Details i. Failure of the electrolytic capacitors in the positive and negative 12V regulators result in a large DC offsets at turn on, resulting in failure of the main AC bridge rectifier. ii. It is believed that RoHS compliant 35A bridge rectifiers are not as reliable as the earlier non-RoHS equivalents. We have therefore decided to increase the rating from 35A to 50A to provide additional headroom under turn on conditions. Solution i. Replace the electrolytic capacitors in the 12V regulator section as per service bulletin AM-SB-120313. ii. When replacing a failed AC bridge rectifier, substitute the original 35A bridge with a 50A model as indicated in the table below. Model VRRM I(AV) Terminals Original Part KBPC3504 400V 35A 0.25" FASTON terminals Replacement Part KBPC5004 400V 50A 0.25" FASTON terminals Notes All models manufactured March 2012 or later are fitted with the 50A replacement part. Part number KBPC5006 may also be fitted (50A 600V). Page 1 of 1