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Service Manual Model X-24 multitracker CAUTION: CAUTION TO PREVENT ELECTRIC SHOCK, MATCH RISK OF ELECTRIC SHOCK DO NOT OPEN WIDE BLADE OF PLUG TO WIDE SOLT, FULLY INSERT. ATTENTION: CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, POUR ÉVITER LES CHOCS ÉLECTRIQUES, DO NOT REMOVE COVER (OR BACK). INTRODUIRE LA LAME LA PLUS LARGE DE NO USER-SERVICEABLE PARTS INSIDE. LA FICHE DANS LA BORNE CORRESPONDANTE DE LA PRISE ET POUSSER REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. JUSQU' AU FOND. The lightening flash with arrowhead symbol, within an equilateral triangle, is intended to alert the user to the presence of uninsulated “dangerous voltage” within the product's enclosure that may be of sufficient magnitude to constitute a risk of electric shock to persons. The exclamation point within an equilateral triangle is intended to alert the user to the presence of important operating and maintenance (servicing) instructions in the literature accompanying the appliance. “WARNING” “TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.” SAFETY INSTRUCTIONS 1. 2. 3. 4. 5. 6. Read instructions - All the safety and operating instructions should be read before the appliance is operated. Retain instructions - The safety and operating instructions should be retained for future reference. Heed warnings - All warnings on the appliance and in the operating instructions should be adhered to. Follow instructions - All operating and use instructions should be followed. Water and Moisture - The appliance should not be used near water - for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, and the like. Carts and Stands - The appliance should be used only with a cart or stand that is recommended by the manufacturer. 9. 10. 11. 12. 13. 14. 15. 7. 8. An appliance and cart combination should be moved with care. Quick stops, excessive force, and uneven surfaces may cause the appliance and cart combination to overturn. Wall or Ceiling Mounting - The appliance should be mounted to a wall or ceiling only as recommended by the manufacturer. Ventilation - The appliance should be situated so that its location or position does not interfere with its proper ventilation. For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block the ventilation openings; or, placed in a built-in installation, such as a bookcase or cabinet that may impede the flow of air through the ventilation openings. 16. 17. Heat - The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other appliances (including amplifiers) that produce heat. Power Sources - The appliance should be connected to a power supply only of the type described in the operating instructions or as marked on the appliance. Grounding or Polarization - The precautions that should be taken so that the grounding or polarization means of an appliance is not defeated. Power Cord Protection - 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 at plugs, convenience receptacles, and the point where they exit from the appliance. Cleaning - The appliance should be cleaned only as recommended by the manufacturer. Nonuse Periods - The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time. Object and Liquid Entry - Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings. Damage requiring Service - The appliance should be serviced by qualified service personnel when: A. The power supply cord or the plug has been damaged; or B. Objects have fallen, or liquid has been spilled into the appliance; or C. The appliance has been exposed to rain; or D. The appliance does not appear to operate normally or exhibits a marked changed in performance; or E. The appliance has been dropped, or the enclosure damaged. Servicing - The user should not attempt to service the appliance beyond that described in the operating instructions. All other servicing should be referred to qualified service personnel. X-24 TABLE OF CONTENTS 1. SPECIFICATIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 2. CONTROLS, INDICATORS AND CONNECTORS . . . . . . . . . . . . 7 3. ADJUSTING PROCEDURES . . . . . . . . . . . . . . . . . . . . . . . . . 8 4. EXPLODED VIEW, PCB ASSEMBLY AND PARTS LIST . . . . . . 14 5. CIRCUIT & BLOCK DIAGRAMS . . . . . . . . . . . . . . . . . . . . . . . . 23 NOTES * Adjusting Procedures, Parts List and circuit diagrams are given in this manual to assist the service technician in maintaining the Model X-24. * The following accessories are supplied with X-24 as the standard accessories. ! Owner's manual AC adaptor AD-12A : 8288418000 (for export & domestic model) : 8270727003 (for USA/CND) : 8270727006 (for EUR) : 8270727007 (for UK) : 8270727010 (for JPN) * Following is the packing material for the Model X-24. Carton, inner, X-24 Packing, L, X-24 Packing, R, X-24 : 8228715000 : 8228439001 : 8228439002 CAUTION ! Parts marked with this sign are safety critical components. They must always be replaced with identical components. Refer to the Fostex Parts List and ensure exact replacement. 3 X-24 1. SPECIFICATIONS DEFINITION Specification Unit Normal Fader Position Input fader Condition Master fader Condition 0 dBV = 1 Vrms At 8 ± 1 position LINE IN / INSERT: -10 dBV / 1 kHz Recorder: Input Monitor mode (REC - PAUSE) Adjust input fader for -10 dBV at TAPE OUT. PAN: L (R) At 8 ± 1 position LINE IN / INSERT: -10 dBV / 1 kHz Recorder: Input Monitor mode (STOP) Adjust master fader for -10 dBV at LINE OUT. PAN: L (R) MIXER SECTION Standard Input MIC IN Connector Input level Impedance LINE IN / INSERT (RCV) Connector Input level Impedance Standard Output TAPE OUT 1 ~ 4 Connector Output level Load impedance LINE OUT L, R Connector Output level Load impedance INSERT (SEND) Connector Output level Load impedance Phones Max. Output Level Level Indication Frequency Response MIC IN (Input Level: -50 dBV) MIC IN (Input Level: -10 dBV) LINE IN (Input Level: -10 dBV) S / N (shorted by 150 Ω resistor) MIC IN (MIC GAIN: MIC) MIC IN (MIC GAIN: LINE) 4 Phone (unbalanced) / XLR (balanced) -50 ~ -10 dBV 10 kΩ or more Stereo phone (tip) -10 dBV 10 kΩ or more RCA pin -10 dBV 10 kΩ or more RCA pin -10 dBV 10 kΩ or more Stereo phone (ring) -10 dBV 10 kΩ or more 20 mW or more (1 kHz, 16 Ω load) 0 dB is indicated by 5-dot LED bargraph meter when input / output level is -10 dBV with the above standard input / master fader position settings. 40 ~ 20 kHz ± 3 dB at LINE OUT 20 ~ 20 kHz ± 3 dB at LINE OUT 50 ~ 10 kHz ± 2 dB at PHONES (10 mW / 16 Ω) 66 dB or more at LINE OUT (DIN AUDIO) 68 dB or more at LINE OUT (IHF A) 73 dB or more at LINE OUT (DIN AUDIO) 75 dB or more at LINE OUT (IHF A) X-24 MIXER SECTION (continued) Distortion (With 400 Hz HPF & 30 kHz LPF) Fader Attenuation Crosstalk PAN Crosstalk Click Noise Power on / off Other switching Shock Noise 0.05 % or less (Input: 1 kHz / 0 dBV signal, MIC GAIN: LINE, LINE OUT: 0 dBV.) 0.2 % or less (Input: 1 kHz / 0 dBV signal, MIC GAIN: LINE, PHONES: 3 mW / 16Ω.) 70 dB or more at 1 kHz (from standard fader position) 60 dB or more at 1 kHz (Input: MIC IN, MIC GAIN: LINE, OUT: SEND OUT. Measure level at non-input channel.) 42 dB or more at 1 kHz (Input: MIC IN, MIC GAIN: LINE, OUT: LINE OUT. Measure level at non-input channel.) -20 dBVp-p or less -30 dBVp-p or less -30 dBVp-p or less (Measure noise level when one side of appliance is dropped 3 times from 5 cm height.) RECORDER SECTION Tape Speed Wow & Flutter PLAY REC & PLAY Pitch Control MIN (PITCH VR: Fully CCW) MAX (PITCH VR: Fully CW) Fast Winding Time (FF / RWD) Tape Counter Deviation Standard Level PLAY REC & PLAY Frequency response PLAY 9.5 cm/s ± 1.5 % (3000 Hz ± 45 Hz when reproducing TCW-211 test tape.) 0.25 % or less (TCW-211 test tape, ANSI WTD.) 0.30 % or less (AC-514 test tape, ANSI WTD.) -45 % or less (TCW-211 test tape) +12 % or more (TCW-211 test tape) 150 ± 20 sec. (TAPE: C-60) 0 ± 7 (FF from BOT to EOT and then RWD to BOT again.) -10 ± 1 dB (TCW-231 test tape) -10 ± 1 dBV (AC-514 test tape, 1 dB or less of level difference between channels is also required.) Test tape: SCW-977 / TCW-284F (NR: OUT) +3 dB -3 dB 40 Hz REC & PLAY 400 Hz 12.5 kHz Test tape: AC-514 (NR: OUT, recording level: 0 dB) +3 dB -3 dB 40 Hz 400 Hz 12.5 kHz Test tape: AC-514 (NR: IN, recording level: -25dB) 6 dB 5 dB 250 Hz 10 kHz 12.5 kHz 5 X-24 RECORDER SECTION (continued) Level Deviation at Reference Output Level PLAY 1 dB or less at 400 Hz (NR: OUT, TCW-231 test tape) 3 dB or less at 40 HZ ~ 12.5 kHz (NR: OUT, SCW-977 / TCW-284F test tape) REC & PLAY 1 dB or less at 400 Hz (NR: OUT, AC-514 test tape) 2 dB or less at 100 Hz ~ 10 kHz (NR: OUT, AC-514 test tape) S/N PLAY 47 dB or more (NR: OUT, DIN AUDIO) 55 dB or more (NR: OUT, IHF-A) REC & PLAY 45 dB or more (NR: OUT, DIN AUDIO) 48 dB or more (NR: OUT, IHF-A) 48 dB or more (NR: IN, DIN AUDIO) 55 dB or more (NR: IN, IHF-A) Distortion (REC & PLAY) 2 % or less (Input signal: 1 kHz / standard level, standard fader position, with 400 Hz HPF & 30 kHz LPF) Erasure Ratio 67 dB or more at 1 kHz (Input signal: 1 kHz / 0 dBV, standard fader position, with 1 kHz BPF) Cross Erasure 1 dB or less (Input signal: 10 kHz / -10 dBV, standard fader position. Measure level difference when adjacent track is put into REC mode.) Channel Separation 50 dB or more (Input signal: 1 kHz / -10 dBV, standard fader position, with 1 kHz BPF. Measure leakage level when adjacent track is put into REC mode.) Sync Crosstalk -25 dBV or less (Input signal: 1 kHz / -10 dBV) -10 dBV or less (Input signal: peak frequency / -10 dBV) (Measure leakage level when adjacent track is put into REC mode.) Bias Leakage -35 dBV or less (No LED meter is lit. Standard fader position. Measure leakage level at TAPE OUT when unit is put into REC mode.) Click Noise PLAY → STOP -30 dBVp-p or less REC → STOP Monitor -20 dBVp-p or less PLAY -20 dBVp-p or less Punch In / Out -30 dBVp-p or less at PLAY Shock Noise -30 dBVp-p or less (Measure playback noise level when one side of appliance is dropped 3 times from 5 cm height.) Specifications and appearance are subject to change without notice for product improvement. 6 X-24 2. CONTROLS, INDICATORS & CONNECTORS < Top Panel > 1 2 3 4 L LINE IN/INSERT R OFF ON STANDBY ON DOLBY NR LINE OUT DC IN 12V RESET - MASTER PAN 000 + WIDE PITCH INPUT/PLAYBACK LEVEL REC SEL -10 5 0 3 6+ -10 5 0 3 6+ -10 5 0 3 6+ -10 5 0 3 6+ 1 1 L R REC SEL 2 2 L R REC SEL 3 3 L R REC SEL 4 4 L R REC Auto Bounce 1/3 MIC IN POWER REHEARSAL DOLBY B NR 2/4 REC 1. Master fader [MASTER] 2. Input/playback level control faders [INPUT/PLAYBACK LEVEL] 3. Pan pot knob [PAN] 4. Record track select switches [REC SEL] 5. Record track LED 6. Level meter 7. Pitch control knob [WIDE PITCH] 8. Tape counter/reset button [RESET] 9. Cassette lid/Cassette tray PLAY REW FF STOP PAUSE 10.Transport control buttons Play button [PLAY] Stop button [STOP] Fast forward button [FF] Rewind button [REW] Recording button [REC] Pause button [PAUSE] 11. Power LED [POWER] 12. Record LED [REC] 13. Auto bounce on/off button [Auto Bounce] 14. Auto bounce LED 15. Trim knob 7 X-24 < Front Panel > PHONES PUNCH IN/OUT 2 (HOT) 3 (COLD) 1 (GND) 1. Mic input jacks [MIC IN 1/3, 2/4] 2. Headphone jack [PHONES] 3. Punch in/out jack [PUNCH IN/OUT] < Rear Panel > 4 1. Line out jacks [LINE OUT L, R] 2. Line in/insert jacks [LINE/INSERT 1, 2, 3, 4] 3. Tape out jacks [TAPE OUT 1, 2, 3, 4] TAPE OUT 3 2 1 4. Dolby B noise reduction on/off switch [DOLBY NR ON/OFF] 5. Power switch [ON-STANDBY] 6. DC IN connector [DC IN 12V] 3. ADJUSTING PROCEDURES 3-1. Routine Maintenance 3-1-1. Cleaning 1) Head With constant use, the head surface becomes soiled with magnetic particles from the tape, dirt and dust. Under such conditions, the tape will not always be in smooth contact with the head and thus result in poor performance. Less 8 X-24 output in the high region and dropout (some parts of sound not reproduced) are typical symptoms. It is therefore recommended to clean the heads periodically before recording and playback to avoid such troubles. 2) Capstan and pinch roller Buildup of magnetic particles and dust on these parts will cause increase in wow, flutter and wrapping of tape on the capstan. Thus, these parts must always be kept clean. Cleaning is done with cotton buds moistened with fluids prescribed or recommended for tape recorders and especially the heads. Never use lacquer thinner, acetone or other organic solvents. 3-1-2. Demagnetizing The REC/PLAY head becomes magnetized by extended use or when the head is touched with a magnetized object. As a result, frequency response especially in the high region will deteriorate, noise level increases, and in some cases may transfer noise to valuable prerecorded tapes. For this reason, do not touch the head with magnetized screwdriver and scissors or allow DC current to flow through the head winding such as when testing continuity with a circuit tester. Should the head becomes magnetized, demagnetize it with a head demagnetizer designed for this purpose. Demagnetizing Procedures 1) After turning off the power of Model X-24, open the cassette lid and if a cassette tape is loaded, remove and place it far away from the deck. 2) Switch on the head demagnetizer while holding it about one meter away from the Model X-24. Then, slowly move the head demagnetizer tip to the head and wave the tip up and down several times close to the head surface. 3) On completing the above procedures, slowly draw the demagnetizer away from the head and switch it off when it is more than one meter away from the head. As demagnetizm in the head cannot be seen, unlike the soiled head, routine demagnetizing is necessary. It is recommended to do so at the same time the head is cleaned. 3-2. Test Equipment and Adjusting Tools The following tools and equipment are required for adjusting the Model X-24. 1) Head height and tape contact adjusting jig Model 9001 (P/N: 8286001000) 2) Torque meter Cassette torque meter TW-2231 (P/N: 8286008000): 0 ~ 200 g-cm (0 ~ 2.8 Oz-In) Cassette torque meter TW-2111A (P/N: 8286009000): 0 ~ 100 g-cm (0 ~ 1.4 Oz-In) 3) Mirror tape cassette TCC-902 (P/N: 8286002000) 4) Test tape Speed / Flutter (3 kHz) Model 9152 (P/N: 82660022000) Also 3150 Hz test tape for Wow & Flutter measurement is recommended. Reference playback level TCW-231 (P/N: 8266002000) Playback frequency response TCW-284F (P/N: 8266003000) 5) Blank tape C-90 or shorter tape, TYPE II / HIGH position 6) Audio oscillator General type 7) Frequency counter General type 8) Bandpass filter General type 9) AC voltmeter Stereo type is recommended. 10) Oscilloscope General type 11) Wow & Flutter meter General type 12) Distortion meter General type 13) Frequency counter General type 9 X-24 3-3. Tape Transport Mechanical Data 3-3-1. Reel torque 1) PLAY mode (TW-2111A) 2) FF/REW mode (TW-2231) Supply: 1.5 ~ 6 g-cm Takeup: 20 ~ 70 g-cm FF /REW: 60 ~ 120 g-cm 3-3-2. Pinch roller pressure Pull force 300 ~ 500 g 3-4. Tape Travel Check and Adjustment Using the mirror type cassette, check to see that the tape is running stable between the ERASE and REC/PLAY heads tape guides without weaving. If the tape is not running stable between the guides, erasure and frequency response will be affected or the tape will be damaged by curling. It then becomes necessary to check the guide height, perpendicularity of the head surface, and alignment of the pinch roller in relation to the capstan. In addition to the mirror type cassette, the Head Height and Tape Contact Jig is required. To check the head guide height, the cassette tape is removed and the above jig is placed on the head mount base plate. While firmly seating the jig on the base plate surface, slide the jig past each head guide to see that it goes through without hitting them. Also check perpendicularity of each head surface, using the rear check bar of the jig. If the guide is low, insert the required amount of 0.1 mm or 0.2 mm thick washers under the head mounting legs, or vice versa, if it is high. NOTE: Always adjust the head azimuth and phase when the head height is adjusted. 3-5. Volume & SW setting Input fader Master fader Pan At 8 ± 1 position At 8 ± 1 position Fully CCW (L) or CW (R) position 3-6. Check and Adjusting of Head Azimuth 1) Switch off the DOLBY SW. 2) Connect an AC volt meter to the TAPE OUT and playback the 12.5 kHz section on the TC-284W test tape. 3) Rotate the REC/PLAY head azimuth adjusting screw to obtain a maximum output level. 3-7. Tape Speed Check and Adjustment 1) Confirm that the Pitch control knob is at center position. 2) Connect a frequency counter or wow & flutter meter with frequency counter to the TAPE OUT and playback the Model 9152 test tape. 3) Check the tape speed and wow & flutter if they satisfy the following specifications. Tape Speed: 3000 Hz ± 30 Hz at both BOT (beginning of tape) and EOT (end of tape) positions Wow & Flutter: 0.25 % (CCIR WTD) at both BOT and EOT positions 4) If the tape speed is not within the above specification, adjust R43 (3.3 kΩ) on the R/P AMP PCB assy. 5) Next, check if the tape speed variable range satisfies the specifications below. Maximum tape speed: +12 % or more (3360 Hz or more) Minimum tape speed: -45 % or less (1650 Hz or less) 3-8. Playback Level Calibration 1) Set the controls as follows. Record track select switch: OFF Dolby B noise reduction on/off switch: OFF 2) Connect an AC volt meter to the TAPE OUT 1 through 4 pin jacks. 10 X-24 3) Playback the TCW-231 test tape and check the output level if it is -10 dBV (0.3 V) ± 1 dB reading. 4) If the reading is not within the above range, adjust R106 ~ R406 on the R/P AMP PCB assy. 3-9. Playback Frequency Response Calibration 1) Set the controls as follows. Record track select switch: OFF Dolby B noise reduction on/off switch: OFF 2) Connect an AC volt meter to the TAPE OUT 1 through 4 pin jacks respectively. 3) Playback the TCW-284F test tape and adjust R103 ~ R403 so that the output level at 6.3 kHz is 0.5 dB lower than the 400 Hz output level. 4) Confirm that the output level at 12.5 kHz is within ± 1 dB of the 400 Hz output level. 3-10. Erase Current Adjustment At adjusting the erase current, put a blank cassette tape to the transport and the track to be adjusted is put in REC mode. Assuming the track 1 to be adjusted, the oscilloscope probe is connected to the test point TP106 on the R/P PCB assy and rotate and fix the core T101 for minimum voltage point. Then, confirm that the voltage at TP105 is more than 55 mV. NOTE: If the voltage at TP106 is adjusted at minimum, the erase current flowing the erase head is set to the maximum. Adjust the remaining tracks in the same way. Track 2: Adjust T201 for minimum voltage at TP206. Then, confirm that the voltage at TP205 is more than 55 mV. Track 3: Adjust T301 for minimum voltage at TP306. Then, confirm that the voltage at TP305 is more than 55 mV. Track 4: Adjust T401 for minimum voltage at TP406. Then, confirm that the voltage at TP405 is more than 55 mV. 3-11. Coarse Bias Adjustment At coarsely adjusting the bias current, put a blank cassette tape to the transport and the track to be adjusted is put in REC mode. Assuming the track 1 to be adjusted, the oscilloscope probe is connected to the test point TP104 on the R/P PCB assy and rotate and fix the pot R133 (220 kΩ) at 60 mV. Adjust the remaining tracks in the same way. Track 2: Adjust R233 so that the voltage at TP204 is 60 mV. Track 3: Adjust R333 so that the voltage at TP304 is 60 mV. Track 4: Adjust R433 so that the voltage at TP404 is 60 mV. 3-12. Record Level Calibration * The procedures up to 3-10 must be completed before proceeding to this adjustment. 1) Put a blank cassette tape to the transport and apply a 400 Hz, -10 dBV (0.3 V) sine wave signal to the INPUT 1 and 2 phone jacks. (In the case the signal is input from XLR jack, the terminal No.3 (COLD) and No. 1 (GND) must be shortened.) 2) Set the controls as follows. Record track select switch: All tracks ON (Confirm that the REC TRK LEDs (1 ~ 4) are blinking.) Trim knob: At minimum Dolby B noise reduction on/off switch: OFF 3) Connect an AC volt meter to the TAPE OUT 1 ~ 4 pin jacks. 4) Put the transport into REC PAUSE mode and adjust the Input Fader so that the level at TAPE OUT 1 ~ 4 is -10 dBV (0.3 V). 5) Release the PAUSE button and start recording the signal. 6) After recording a certain length, rewind the tape to the start point of recording section. Then, playback the tape and check the level at TAPE OUT 1 ~ 4. If the AC volt meter reading is not within -10 dBV (0.3 V) ± 0.5 dB, adjust the pot R121 ~ 421 (22 kΩ) on the R/P PCB assy. 11 X-24 3-13. Overall Frequency Response Adjustment 1) Set the controls under the same condition as 3.12 except the DOLBY switch. (The switch should be turned on.) 2) Apply a 400 Hz, -35 dBV (18 mV) signal to the INPUT 1 and 2 phone jacks. 3) Record the signal, rewind and playback the recorded section of the tape and memorize the output level at TAPE OUT 1 ~ 4. 4) Next, apply 6 kHz & 12 kHz, -35 dBV (18 mV) signals to the INPUT 1 and 2 phone jacks. 5) Record the signal, rewind and playback the recorded section of the tape. 6) Check if the 6 kHz / 12 kHz output level at TAPE OUT 1 ~ 4 is within ± 2 dB comparing to the 400 Hz output level. If the AC volt meter reading is not within the above specification, adjust the pot R133 ~ 433 (220 kΩ) on the R/P AMP PCB assy so that the recording level at 6 kHz will be within the specification. 3-14. T.H.D. Measurement 1) Connect a distortion meter, 400 Hz HPF and 30 kHz LPF to TAPE OUT 1 ~ 4 and set the controls under the same condition as 3-12. 2) Record a 1 kHz, -10 dBV (0.3 V) sine wave signal. 3) Playback the recorded part and check if the distortion level is less than 2 %. 3-15. Erasure Measurement 1) Connect a 1 kHz bandpass filter and AC volt meter to TAPE OUT 1 ~ 4 and set the controls under the same condition as 3-12. 2) Record a 1 kHz, 0 dBV (1 V) sine wave signal which is 10 dB higher than the reference recording level on a blank tape. 3) Rewind the tape to the start point of recording and advance it by a short length. Then, record again without applying the signal on the remaining part. 4) Rewind the tape to the start point again and play it back. Check if the level ratio between the playback level and nosignal section (erased part) is 67 dB or more. 3-16. Cross Erasure Measurement 1) Set the controls as follow. Trim knob: At minimum Input fader: Standard position (At 8 ± 1) Dolby B noise reduction on/off switch: OFF 2) Input a 100 kHz, -10 dBV signal to the INPUT 1 and 2 phone jacks and record the signal on all tracks. 3) Rewind the tape to the start point of recording. Then, erase the 10 kHz signal on the track and check if the level difference at the corresponding track indicated below is within 1 dB. Tracks to be measured Track (s) to be erased 1 2 2 1 and 3 3 2 and 4 4 3 4) If the level goes down by more than 1 dB, check the tape running path again. 12 X-24 3-17. Sync crosstalk measurement Sync crosstalk is a relative figure against the reference level, on how much of the recording signal from a track in recording mode is leaking into the track being reproduced. When sync crosstalk is excessively high, playback output during overdubbing will sound muddy by effect of the recording signal leakage or cause oscillation at pingpong recording (where the playback output is transferred to another track). 1) Set the controls as follow and put a blank tape to the transport. Trim knob: At minimum Input fader: Standard position (At 8 ± 1) Dolby B noise reduction on/off switch: OFF 2) Apply a signal whose level is -10 dBV (0.3 V). 3) Put one track into REC mode and check if the level at TAPE OUT on an adjacent track is within the specifications listed below when sweeping the oscillator frequency. At 1 kHz: -25 dBV or less 1 ~ 20 kHz: -10 dBV or less 3-18. S/N Measurement 3-18-1. Reproduce 1) Set the control as follow. Dolby B noise reduction on/off switch: OFF 2) Connect an AC volt meter and put the transport into PLAY mode without loading a tape. 3) Check if the AC volt meter reading is within the following specifications. DIN AUDIO: 47 dB IHF-A: 55 dB 3-18-2. Record and reproduce (Overall) 1) Set the control as follow. Dolby B noise reduction on/off switch: OFF 2) Put a blank cassette tape and start recording without applying a signal. 3) Rewind the tape to the start point and play it back. 4) Check if the AC volt meter reading is within the following specifications. DIN AUDIO: 45 dB IHF-A: 48 dB 5) Next, turn the Dolby switch on and repeat the above procedures 2) ~ 4). 6) Check if the AC volt meter reading is within the following specifications. DIN AUDIO: 48 dB IHF-A: 55 dB 3-19. Click Noise Measurement 3-19-1. Dolby switch on/off 1) Check if the click noise level at TAPE OUT when turning on/off the Dolby switch is less than -30 dBV p-p. 3-19-2. REC/STOP (monitor) 1) Check if the click noise level at TAPE OUT when punching out by pressing the STOP button is less than -20 dBVp-p. 3-19-3. REC/STOP (on tape) 1) Turn off the Dolby switch, turn on all the 1 ~ 4 record track switches and put a blank cassette tape in the transport. 2) Plug the foot switch (e.g. Model 8051) in the Punch in/out jack and press the PLAY button. 3) Press the foot switch repeatedly and check if the click level at TAPE OUT 1 ~ 4 is less than -20 dBVp-p. 13 X-24 3-20. Table of Adjusting Items Adjusting Item Tape speed Playback level calibration Playback frequency response calibration Erase current adjustment Coarse bias adjustment Record level calibration Overall frequency response adjustment Measuring Point TAPE OUT TAPE OUT 1 ~ 4 TAPE OUT 1 ~ 4 TP106 ~ TP406 TP105 ~ TP405 TP104 ~ 404 TAPE OUT 1 ~ 4 TAPE OUT 1 ~ 4 Adjusting Point R43 (R/P) R106 ~ R406 (R/P) R103 ~ R403 (R/P) T101 ~ 401 (R/P) R133 ~ 433 R121 ~ 421 R133 ~ 433 Ref. Clause (page) 3-7 (P10) 3-8 (P10 ~ 11) 3-9 (P11) 3-10 (P11) 3-11 (P11) 3-12 (P11) 3-13 (P12) 4. EXPLODED VIEW, PCB ASSEMBLY AND PARTS LIST X-24 OVERALL EXPLODED VIEW & PARTS LIST Ref. No. Part No. 1 2 8216 6580 00 8212 5931 00 3 4 Description Ref. No. Part No. Sheet, meter, X-24 Cover, cassette, X-14/24 20 21 8226 2091 01 8226 2081 01 Knob, cassette, REW, X-14/24 Knob, cassette, FF, X-14/24 8212 6050 00 8226 1590 04 Case, top, X-24 Knob, fader, N7, GR 22 23 8226 2111 01 8226 2121 01 Knob, cassette, STOP, X-14/24 Knob, cassette, PAUSE, X-14/24 5 6 8226 1590 05 8226 2070 02 Knob, fader, N7, R Knob, pitch, gain, N7 24 25 8216 6600 00 8274 1340 00 Shield, center, X-24 PCB assy, Jack, X-24 7 8 8226 2070 01 8216 6490 00 Knob, pitch, N7 Cushion, cover, X-14/24 ! 26 27 8221 2260 00 8274 1350 00 Bracket, jack, X-24 PCB assy, R/P, X-24 9 10 8216 4230 00 8214 2110 00 Reflector, cassette Spring, cassette, X-18/14/24 11 12 8216 6590 00 8226 2360 01 Shield, top, X-24 Knob, sel, bounce, X-24 ! 28 29 30 8204 0820 00 8212 6060 00 8270 7270 03 Plate, mounting, B Case, bottom, X-24 AC adaptor, AD-12A, USA/CND 13 14 8204 0370 01 8226 1620 05 Ring, CSTW-2 Knob, volume, N7, Y 8270 7270 06 8270 7270 07 AC adaptor, AD-12A, EUR AC adaptor, AD-12A, UK 15 16 8274 1330 00 8216 6610 00 PCB assy, Mixer, X-24 Shield, bottom, X-24 31 8270 7270 10 8274 1400 00 AC adaptor, AD-12A, JPN PCB assy, Regulator, X-24 17 18 8270 8240 00 8226 2131 01 Transport assy, X-24 Knob, cassette, REC, X-14/24 32 33 8216 6800 00 8277 4470 15 Sheet, isolation X-24 Cable assy, 1P, earth lug, D3-8MF/F, 19 8226 2101 01 Knob, cassette, PLAY, X-14/24 ! Description L150 X-24 TRANSPORT EXPLODED VIEW & PARTS LIST 14 Ref. No. Part No. Description 1 2 8259 0500 00 8259 0520 00 Head, erase, X-14/24 Head, R/P, 4T, N-LR44RS07, X-24 3 4 8260 4620 00 8260 4630 00 Pinch roller assy Idler arm assy 5 6 8260 4640 00 8260 4650 00 Fly wheel assy Motor assy 7 8 8260 4660 00 8212 4930 00 F.R. arm assy Lever, REC safety 9 10 8212 4910 00 8212 4920 00 Gear, arm Gear, FF 11 12 8253 4280 00 8253 4290 00 SW, leaf, MSW-1541XACV SW, leaf, MSW-1716CV Ref. No. Part No. 13 8223 2770 00 Description Shaft, button 14 15 8216 5310 00 8216 5320 00 Belt, main Belt, sub 16 17 8216 5330 00 8221 1970 00 Belt, counter Bracket, button 18 19 8256 1690 00 8214 3550 00 Counter Spring, pinch arm 20 21 8214 3560 00 8214 3570 00 Spring, FR torsion Spring, stop/pause 22 23 8214 3580 00 8214 3590 00 Spring, safety sensor Spring, rec lever 24 8214 3600 00 Spring, play lever X-24 X-24 OVERALL EXPLODED VIEW 1 2 5 6 BBT 3x8 CZn 4 8 7 9 17 3 18 10 19 20 21 22 23 BBT 3x8 CZn 11 BBT 3x8 CZn 32 30 BBT 3x8 CZn 28 BBT 3x8 CZn 13 12 BBT 3x8 CZn 24 27 33 BBT 3x8 CZn BBT 3x8 CZn 25 BBT 3x8 CZn 14 16 26 31 29 15 BBT 3x8 CZn BBT 3x12 BZn 15 X-24 16 X-24 TRANSPORT EXPLODED VIEW X-24 • MIXER / JACK PCBs X-24 PCB PATTERN DRAWING 17 X-24 18 • R/P / REGULATOR PCBs X-24 X-24 Parts List • MIXER PCB Ref. No. Part No. Description PCB assy, Mixer, X-24 Plain PCB, Mixer, X-24 Ref. No. Part No. Description R108~408 8230 1384 32 R109~409 8230 1383 03 HT, carbon, 1/4W, 4.3kΩ, 5% HT, carbon, 1/4W, 30kΩ, 5% R110~410 8230 1384 73 R111~411 8230 1381 23 HT, carbon, 1/4W, 47kΩ, 5% HT, carbon, 1/4W, 12kΩ, 5% Description ST, analog, NJM2068M R112~412 8230 1381 04 R113~413 8230 1381 23 HT, carbon, 1/4W, 100kΩ, 5% HT, carbon, 1/4W, 12kΩ, 5% U002~004 8236 7207 00 U005 8236 0352 03 ST, analog, NJM4560M SIP, analog, NJM4556AL R114~414 8230 1381 23 R115~415 8230 1384 73 HT, carbon, 1/4W, 12kΩ, 5% HT, carbon, 1/4W, 47kΩ, 5% U006 8236 7207 00 U007~012 8236 5707 01 ST, analog, NJM4560M ST, digital, DTA144EK R116~416 8230 1382 43 R117~417 8230 1382 43 HT, carbon, 1/4W, 24kΩ, 5% HT, carbon, 1/4W, 24kΩ, 5% U101~401 8236 5000 00 U102~402 8236 5706 01 ST, digital, CMOS, 4066BF ST, digital, DTC144EK R118~418 8230 1383 03 R119~419 8230 1383 03 HT, carbon, 1/4W, 30kΩ, 5% HT, carbon, 1/4W, 30kΩ, 5% U103~403 8236 5706 01 U104~404 8236 0832 00 ST, digital, DTC144EK SIP, analog, LED driver, BA6124 R120~420 8230 1381 23 R121~421 8230 1385 12 HT, carbon, 1/4W, 12kΩ, 5% HT, carbon, 1/4W, 5.1kΩ, 5% U105~205 8236 5702 01 ST, digital, driver, DTC314TK R122~422 8230 1381 03 R125~425 8230 1384 73 HT, carbon, 1/4W, 10kΩ, 5% HT, carbon, 1/4W, 47kΩ, 5% R126~426 8230 1381 23 R127~427 8230 1381 23 HT, carbon, 1/4W, 12kΩ, 5% HT, carbon, 1/4W, 12kΩ, 5% B001 8274 1330 00 8251 9680 01 ICs Ref. No. U001 Ref. No. Part No. 8236 5405 00 DIODEs Description Part No. D001~005 8234 1046 02 Opt., VT, LED, GRN, SLR-332MC-TE7 R130, 230 8240 1710 28 Pot, PI, RT14, 100kΩCC, RK14K123, L15 D006 8234 1046 01 Opt., VT, LED, RED, SLR-332VC-TE7 R131 8240 2740 03 R133~433 8240 1670 06 Pot, PI, SL30, 20kΩA, RS30H111 Pot, PI, RT09, 50kΩB, RK09K113 D007 8234 1046 02 Opt., VT, LED, GRN, SLR-332MC-TE7 R134~434 8240 2740 04 R135 8240 1670 08 Pot, PI, SL30, 20kΩAA, RS30H121 Pot, PI, RT09, 10kΩB, RK09K113 D101~401 8234 5007 00 D102~402 8234 5007 00 HT, 1SS136 HT, 1SS136 R150, 250 8230 1386 83 R151, 250 8230 1381 23 HT, carbon, 1/4W, 68kΩ, 5% HT, carbon, 1/4W, 12kΩ, 5% D103~403 8234 1046 03 Opt., VT, LED, YEL, SLR-332YC-TE7 R152, 252 8230 1382 43 R153, 253 8230 1384 73 HT, carbon, 1/4W, 24kΩ, 5% HT, carbon, 1/4W, 47kΩ, 5% D104~404 8234 1046 03 Opt., VT, LED, YEL, SLR-332YC-TE7 R154, 254 8230 1381 02 R155, 255 8230 1384 73 HT, carbon, 1/4W, 1kΩ, 5% HT, carbon, 1/4W, 47kΩ, 5% D105~405 8234 1046 03 Opt., VT, LED, YEL, SLR-332YC-TE7 R156, 256 8230 1381 60 HT, carbon, 1/4W, 16Ω, 5% D106~406 8234 1046 01 Opt., VT, LED, RED, SLR-332VC-TE7 D107~407 8234 1046 01 Opt., VT, LED, RED, SLR-332VC-TE7 RESISTORs CAPACITORs ALU = Electrolytic type Ref. No. Part No. CER = Ceramic type Description C001, 002 8232 1424 76 C005, 006 8232 1424 76 VT, ALU, 10V, 47µF, 20%, SME VT, ALU, 10V, 47µF, 20%, SME Ref. No. Part No. R001~007 8230 1387 51 Description HT, carbon, 1/4W, 750Ω, 5% C010 C011 8232 8012 21 8232 8012 20 VT, CER, 50V, 220pF, 5%, SL VT, CER, 50V, 22pF, 5%, SL R010~012 8230 1381 23 R013 8230 1384 73 HT, carbon, 1/4W, 12kΩ, 5% HT, carbon, 1/4W, 47kΩ, 5% C012 C013 8232 8012 21 8232 8012 20 VT, CER, 50V, 220pF, 5%, SL VT, CER, 50V, 22pF, 5%, SL R103, 203 8230 1381 02 R104, 204 8230 1381 02 HT, carbon, 1/4W, 1kΩ, 5% HT, carbon, 1/4W, 1kΩ, 5% C014 8232 1431 06 C103, 203 8232 1421 07 VT, ALU, 16V, 10µF, 20%, SME VT, ALU, 10V, 100µF, 20%, SME R105, 205 8230 1381 04 R106, 206 8230 1381 04 HT, carbon, 1/4W, 100kΩ, 5% HT, carbon, 1/4W, 100kΩ, 5% C104, 204 8232 1421 07 C105, 205 8232 8011 00 VT, ALU, 10V, 100µF, 20%, SME VT, CER, 50V, 10pF, 5%, SL R107, 207 8230 1384 73 HT, carbon, 1/4W, 47kΩ, 5% C106, 206 8232 8011 00 VT, CER, 50V, 10pF, 5%, SL 19 X-24 Ref. No. Part No. Description Part No. Description C107, 207 8232 1431 06 C108~408 8232 1431 06 VT, ALU, 16V, 10µF, 20%, SME VT, ALU, 16V, 10µF, 20%, SME R102, 202 8230 1381 23 Resistor, HT, carbon, 1/4W, 12kΩ, 5% C109~409 8232 1431 06 C110~410 VT, ALU, 16V, 10µF, 20%, SME Wire, jumper, IPS-1041-2, F5 C101, 201 C102, 202 N/A N/A C111~411 C112~412 N/A N/A E001 E002 Wire, jumper, IPS-1041-2, F5 Wire, jumper, IPS-1041-4, F10 C113~413 8232 1431 06 C114~414 8232 1431 06 VT, ALU, 16V, 10µF, 20%, SME VT, ALU, 16V, 10µF, 20%, SME J001 J002 8245 1711 03 8245 1712 03 Connector, PI, jack, 8283, 3P, WHT Connector, PI, jack, 8283, 3P, RED C115~415 8232 1431 06 C150, 250 8232 8012 21 VT, ALU, 16V, 10µF, 20%, SME VT, CER, 50V, 220pF, 5%, SL J003 J005 8245 1713 03 8245 2980 00 Connector, PI, jack, 8283, 3P, BLK Connector, PL, jack, phone, C151, 251 8232 8012 20 C152, 252 8232 1431 06 VT, CER, 50V, 22pF, 5%, SL VT, ALU, 16V, 10µF, 20%, SME 8245 2980 00 LGR4609-7000 Connector, PL, jack, phone, C153, 253 8232 8012 21 C154, 254 8232 8012 20 VT, CER, 50V, 220pF, 5%, SL VT, CER, 50V, 22pF, 5%, SL J101, 201 8245 3390 04 LGR4609-7000 Connector, PL, jack, phone, C155, 255 8232 1431 06 C156, 256 8232 1424 77 VT, ALU, 16V, 10µF, 20%, SME VT, ALU, 10V, 470µF, 20%, SME J102, 202 8245 2680 04 YKB21-5074 Connector, PL, jack, XLR31, W004 8276 9082 20 NC3FAHR10 Cable, flat, 2P, L200 Y901 8207 0122 02 Holder, cable, 2P, 51048 MISCELLANEOUS Ref. No. E001 Part No. Description Wire, jumper, IPS-1041-2, F5 J006 E002 J004 8245 2120 01 Wire, jumper, IPS-1041-4, F10 Connector, PL, jack, RCA, 2P, BLK J007 J104~404 8245 5280 01 8245 2980 00 Connector, PI, jack, 1P, RT-01T-1.0B Connector, PL, jack, phone, Ref. No. S001~005 8253 1350 02 LGR4609-7000 Switch, PT, tact, SOR-112HS B001 Y005 Y006 8207 0122 09 8207 0122 13 Holder, cable, 9P, 51048 Holder, cable, 13P, 51048 Y007 Y008 8207 0122 08 8207 0122 06 Holder, cable, 8P, 51048 Holder, cable, 6P, 51048 W001 8277 0160 15 Cable assy, shield 2C, 3P, WHT-9073, L150 W002 8277 0161 30 Cable assy, shield 2C, 3P, RED-9073, L300 W003 8277 0162 50 Cable assy, shield 2C, 3P, BLK-9073, L500 W005 W006 8276 9086 25 8276 9093 25 Cable, flat, 6P, L250 Cable, flat, 13P, L250 W007 W008 8276 9088 25 8276 9089 25 Cable, flat, 8P, L250 Cable, flat, 9P, L250 • JACK PCB Ref. No. B001 Ref. No. Part No. 8274 1340 00 8251 9681 02 Part No. R101, 201 8230 1381 23 20 Ref. No. Description PCB assy, Mixer, X-24 Plain PCB, Jack, X-24 Description Resistor, HT, carbon, 1/4W, 12kΩ, 5% • R/P PCB Part No. 8274 1350 00 8251 9700 01 Description PCB assy, R/P, X-24 Plain PCB, R/P, X-24 ICs Ref. No. U001 U002 U003 Part No. Description N/A 8236 0782 06 8236 0361 00 PT, digital, driver, DTA143TS SIP, analog, BA4560N U004~022 8236 5707 01 U023 8236 0837 00 ST, digital, driver, DTA144EK SDI, digital, CPU, X-24, U030, 031 8236 5706 01 TMP47C200BN ST, digital, driver, DTC144EK U040 U041 ST, digital, driver, DTC144EK ST, digital, driver, DTA144EK 8236 5706 01 8236 5707 01 U101~401 8236 5405 00 U102~402 8236 0457 00 ST, analog, NJM2068M SOP, analog, HA12135AF U104~404 8236 5701 03 U105~405 8236 5707 01 ST, digital, driver, DTC114TK ST, digital, driver, DTA144EK U106~406 8236 5701 03 U107~407 8236 5701 03 ST, digital, driver, DTC114TK ST, digital, driver, DTC114TK U108~408 8236 5701 03 U109~409 8236 4190 00 ST, digital, driver, DTC114TK SIP, analog, head SW, BA7755A TRANSISTORs Ref. No. Q001 Part No. 8234 1430 00 Description V, NPN, 2SC3071 X-24 Ref. No. Part No. Q002, 003 8234 5043 03 Description VT, NPN, 2SC1740S, S Ref. No. Part No. R102~402 8230 1381 04 Description HT, carbon, 1/4W, 100kΩ, 5% Q004 8234 5050 00 Q101~401 8234 5043 03 VT, FET, 2SK117, Y/GR/BL VT, NPN, 2SC1740S, S R103~403 8231 5032 23 R105~405 8230 1383 94 R-TRIM, PIT, carbon, 22kΩ, 637T HT, carbon, 1/4W, 390kΩ, 5% R106~406 8231 5034 71 R107~407 8230 1383 32 R-TRIM, PIT, carbon, 470Ω, 637T HT, carbon, 1/4W, 3.3kΩ, 5% VT, DSK10C-BT Wire, jumper, IPS-1041-2, F5 R108~408 8230 1381 81 R109~409 8230 1382 22 HT, carbon, 1/4W, 180Ω, 5% HT, carbon, 1/4W, 2.2kΩ, 5% D003 8234 0196 02 D004, 005 8234 5007 00 VT, DSK10C-BT HT, 1SS136 R110~410 8230 1383 32 R113~413 8230 1381 83 HT, carbon, 1/4W, 3.3kΩ, 5% HT, carbon, 1/4W, 18kΩ, 5% D101~401 8234 5007 00 D102~402 8234 5007 00 HT, 1SS136 HT, 1SS136 R114~414 8230 1382 03 R115~415 8230 1382 03 HT, carbon, 1/4W, 20kΩ, 5% HT, carbon, 1/4W, 20kΩ, 5% D103~403 8234 5007 00 D104~404 8234 5007 00 HT, 1SS136 HT, 1SS136 R116~416 8230 1382 41 R117~417 8230 1382 02 HT, carbon, 1/4W, 240Ω, 5% HT, carbon, 1/4W, 2kΩ, 5% R118~418 8230 1382 02 R119~419 8230 1382 02 HT, carbon, 1/4W, 2kΩ, 5% HT, carbon, 1/4W, 2kΩ, 5% Ref. No. D001 D002 DIODEs Description Part No. 8234 0196 02 RESISTORs Ref. No. R001 Part No. 8230 1388 21 Description HT, carbon, 1/4W, 820Ω, 5% R120~420 8230 1384 72 R121~421 8231 5032 23 HT, carbon, 1/4W, 4.7kΩ, 5% R-TRIM, PIT, carbon, 22kΩ, 637T R002 R003 8230 1383 94 8230 1382 03 HT, carbon, 1/4W, 390kΩ, 5% HT, carbon, 1/4W, 20kΩ, 5% R122~422 8230 1386 22 R123~423 8230 1383 63 HT, carbon, 1/4W, 6.2kΩ, 5% HT, carbon, 1/4W, 36kΩ, 5% R004, 005 8230 1381 03 R006. 007 8230 1382 20 HT, carbon, 1/4W, 10kΩ, 5% HT, carbon, 1/4W, 22Ω, 5% R124~424 8230 1381 53 R125~425 8230 1381 53 HT, carbon, 1/4W, 15kΩ, 5% HT, carbon, 1/4W, 15kΩ, 5% R008 R010 8230 1387 51 8230 0510 06 HT, carbon, 1/4W, 750Ω, 5% V, array, 1/8W, 47kΩ-47kΩ x 5, R129~429 8230 1386 22 R130~430 8230 1381 03 HT, carbon, 1/4W, 6.2kΩ, 5% HT, carbon, 1/4W, 10kΩ, 5% 8230 0361 03 5%, RKC-E V, array, 1/8W, 10kΩ x 4, 5%, RKC R131~431 8230 1381 01 R132~432 8230 1381 09 HT, carbon, 1/4W, 100Ω, 5% HT, carbon, 1/4W, 1Ω, 5% R012 8230 0361 03 R013, 014 8230 1384 79 V, array, 1/8W, 10kΩ x 4, 5%, RKC HT, carbon, 1/4W, 4.7Ω, 5% R133~433 8231 5032 24 R134~434 8230 1382 22 R-TRIM, PIT, carbon, 220kΩ, 637T HT, carbon, 1/4W, 2.2kΩ, 5% R020 R021 8230 1384 73 8230 1381 03 HT, carbon, 1/4W, 47kΩ, 5% HT, carbon, 1/4W, 10kΩ, 5% R135~435 8230 1382 22 R136~436 8230 1382 20 HT, carbon, 1/4W, 2.2kΩ, 5% HT, carbon, 1/4W, 22Ω, 5% R022~026 8230 1384 73 R027 8230 1381 03 HT, carbon, 1/4W, 47kΩ, 5% HT, carbon, 1/4W, 10kΩ, 5% CAPACITORs R028, 029 8230 1384 73 R030 8230 1381 03 HT, carbon, 1/4W, 47kΩ, 5% HT, carbon, 1/4W, 10kΩ, 5% ALU = Electrolytic type CER = Ceramic type R031 R032 8230 1384 73 8230 1381 03 HT, carbon, 1/4W, 47kΩ, 5% HT, carbon, 1/4W, 10kΩ, 5% PES = Mylar type PPR = Polypropylene type R033 R038 8230 1384 73 8230 1381 03 HT, carbon, 1/4W, 47kΩ, 5% HT, carbon, 1/4W, 10kΩ, 5% Ref. No. C001 Part No. 8232 8031 03 Description VT, CER, 50V, 0.01µF, YF R040 R041 8230 1381 05 8230 1381 03 HT, carbon, 1/4W, 1MΩ, 5% HT, carbon, 1/4W, 10kΩ, 5% C002 C003 8232 1444 77 8232 1441 07 VT, ALU, 25V, 470µF, 20%, SME VT, ALU, 25V, 100µF, 20%, SME R042 R043 8230 1383 32 8231 5033 32 HT, carbon, 1/4W, 3.3kΩ, 5% R-TRIM, PIT, carbon, 3.3kΩ, 637T C004 C005 8232 1421 07 8232 1432 26 VT, ALU, 10V, 100µF, 20%, SME VT, ALU, 16V, 22µF, 20%, SME R044 R050 8230 1385 11 8230 1382 03 HT, carbon, 1/4W, 510Ω, 5% HT, carbon, 1/4W, 20kΩ, 5% C006, 007 8232 1422 27 C008, 009 8232 1421 07 VT, ALU, 10V, 220µF, 20%, SME VT, ALU, 10V, 100µF, 20%, SME R051 R052 8230 1384 72 8230 1383 32 HT, carbon, 1/4W, 4.7kΩ, 5% HT, carbon, 1/4W, 3.3kΩ, 5% C012 8232 1432 26 C020~025 8232 8031 03 VT, ALU, 16V, 22µF, 20%, SME VT, CER, 50V, 0.01µF, YF R053 R054 8230 1384 73 8230 1384 70 HT, carbon, 1/4W, 47kΩ, 5% HT, carbon, 1/4W, 47Ω, 5% C028 C029 8232 8181 04 8232 8031 03 VT, CER, 25V, 0.1µF, YF VT, CER, 50V, 0.01µF, YF R055 R056 8230 1383 33 8230 1384 72 HT, carbon, 1/4W, 33kΩ, 5% HT, carbon, 1/4W, 4.7kΩ, 5% C050 C051 8232 1421 07 8232 9011 04 VT, ALU, 10V, 100µF, 20%, SME VT, PES, 50V, 0.1µF, 5%, AMZ R101~401 8230 1382 43 HT, carbon, 1/4W, 24kΩ, 5% C052 8232 9012 23 VT, PES, 50V, 0.022µF, 5%, AMZ R011 21 X-24 Ref. No. Part No. C053, 054 8232 9014 72 Description VT, PES, 50V, 0.0047µF, 5%, AMZ Ref. No. J301 Part No. 8245 5472 05 Description Connector, PI, jack, PH, 5P, BLU C055 8232 1431 06 C101~401 8232 8015 61 VT, ALU, 16V, 10µF, 20%, SME VT, CER, 50V, 560pF, 5%, SL J401 L001 8245 5473 05 8242 1420 00 Connector, PI, jack, PH, 5P, GRN Coil, bias, 150µH C102~402 8232 1461 05 C103~403 VT, ALU, 50V, 1µF, 20%, SME N/A L101~401 8256 0660 00 L102~402 8256 0990 00 Module, trap, 80kHz Module, MPX, XR-5/X-24 C104~404 8232 8012 21 C105~405 8232 9018 22 VT, CER, 50V, 220pF, 5%, SL VT, PES, 50V, 0.0082µF, 5%, AMZ L103~403 8256 0660 00 S001, 002 8253 6520 05 Module, trap, 80kHz SW, PL, slide, 2-2, C106~406 8232 1424 76 C107~407 8232 1462 25 VT, ALU, 10V, 47µF, 20%, SME VT, ALU, 50V, 2.2µF, 20%, SME TP001 non-shortening, SSSU1, L09 Pin, header C108~408 8232 9013 92 C109~409 8232 1461 05 VT, PES, 50V, 0.0039µF, 5%, AMZ VT, ALU, 50V, 1µF, 20%, SME TP101~401 8276 0010 00 TP104~404 8276 0010 00 Pin, header Pin, header C110~410 8232 1461 05 C112~412 8232 1464 75 VT, ALU, 50V, 1µF, 20%, SME VT, ALU, 50V, 4.7µF, 20%, SME TP105~405 8276 0010 00 TP106~406 8276 0010 00 Pin, header Pin, header C113~413 8232 1462 24 C114~414 8232 1424 76 VT, ALU, 50V, 0.22µF, 20%, SME VT, ALU, 10V, 47µF, 20%, SME T001 8242 1250 00 T101~401 8242 2470 00 Transformer, osc, main, 80kHz Transformer, osc, sub, 80kHz C115~415 8232 1424 76 C116~416 8232 1424 76 VT, ALU, 10V, 47µF, 20%, SME VT, ALU, 10V, 47µF, 20%, SME W001 X001 Cable assy, earth lug, D3-kink, L70 Resonator, P, CER, 4MHz, EFO C117~417 8232 1424 76 C118~418 8232 9012 73 VT, ALU, 10V, 47µF, 20%, SME VT, PES, 50V, 0.027µF, 5%, AMZ C119~419 8232 1431 06 C120~420 VT, ALU, 16V, 10µF, 20%, SME N/A C121~421 8232 1461 04 C122~422 8232 8011 81 VT, ALU, 50V, 0.1µF, 20%, SME VT, CER, 50V, 180pF, 5%, SL C123~423 8232 9011 82 C124~424 8232 1462 25 VT, PES, 50V, 0.0018µF, 5%, AMZ VT, ALU, 50V, 2.2µF, 20%, SME C125~425 8232 8012 21 C126~426 8233 0481 52 VT, CER, 50V, 220pF, 5%, SL VT, PPR, 100V, 0.0015µF, 5%, APS C128~428 8232 9011 03 VT, PES, 50V, 0.01µF, 5%, AMZ Ref. No. E001 E002 Wire, jumper, IPS-1041-2, F5 Wire, jumper, IPS-1041-3, F7.5 E003 E004 Wire, jumper, IPS-1041-4, F10 Wire, jumper, IPS-1041-5, F12.5 J001 22 MISCELLANEOUS Part No. Description 8245 5410 00 Connector, PL, jack, DC-inlet, YKB31-0012 J002 J003 8245 3080 02 8245 5470 09 Connector, PI, jack, SBRK, 2S-4 Connector, PI, jack, PH, 9P, WHT J004 8245 2260 01 Connector, PL, jack, RCA 4P, YKC21-3115 J005 J006 8245 3080 06 8245 3080 13 Connector, PI, jack, SBRK, 6S-4 Connector, PI, jack, SBRK, 13S-4 J007 J008 8245 3080 08 8245 3080 09 Connector, PI, jack, SBRK, 8S-4 Connector, PI, jack, SBRK, 9S-4 J009, 010 8245 5280 01 Connector, PI, jack, 1P, RT-01T-1.0B J011 J101 8245 3080 04 8245 5470 05 Connector, PI, jack, SBRK, 4S-4 Connector, PI, jack, PH, 5P, WHT J201 8245 5471 05 Connector, PI, jack, PH, 5P, RED 8276 0010 00 8276 3640 07 8256 0980 00 • REGULATOR PCB Ref. No. Part No. Description 8274 1400 00 8251 9700 02 B001 Ref. No. PCB assy, Regulator, X-24 Plain PCB, Regulator, X-24 Part No. Description U001 8236 0449 10 C001, 002 8232 9011 03 IC, 220, regulator, µPC2410HF Capacitor, VT, PES, 50V, 0.01µF, W011 8276 9084 20 AMZV Cable, flat, 4P, L200 Y101 8207 0122 04 Holder, cable, 4P, 51048 Abbreviation ST: Small Outline Package SIP: Single In-line Package 220: TO-220 type SDI: Shrink DIP (dual in-line) SOP: Small Outline Package HT: Horizontal mount taping device V: Vertical mount VT: Vertical mount Taping device PI: PL: Penetrate mount I form (straight) Penetrate mount L form (right angle) PT: Penetrate mount Taping device PIT: Penetrate mount I form Taping device J404 AGND +VCC -VCC HGND H+VCC H-VCC INPUT IMP 14Kohm LINE IN4 -10dBV J304 INPUT IMP 14Kohm LINE IN3 -10dBV J204 INPUT IMP 14Kohm LINE IN2 -10dBV J104 INPUT IMP 14Kohm LINE IN1 -10dBV INPUT IMP MIC :12Kohm LINE:22Kohm INPUT MIC 2/4 (BALANCE) -10dBV <> -50dBV INPUT IMP MIC :12Kohm LINE:22Kohm INPUT MIC 1/3 (BALANCE) -10dBV <> -50dBV 1 2 3 4 5 6 W5 3 3 H-VCC HGND H+VCC R408 4.3K R308 4.3K R208 4.3K R108 4.3K 1 2 1 2 -VCC 750 POWER LED D7 R7 -VCC +VCC J202 J201 J102 J101 JACK PCB (1/2) +VCC AGND R410 47K R310 47K R210 47K H-VCC REC LED A.B TRK4 TRK3 TRK2 1 1 1 1 1 J2 3 2 1 J1 3 2 1 AGND R202 12K R110 47K TRK1 C408 10/16 C308 10/16 C208 10/16 C108 10/16 C202 NON R201 12K R102 12K C102 NON C201 NON R101 12K C101 NON D6 SW5 2 D5 SW4 2 D4 SW3 2 D3 SW2 2 D2 SW1 2 D1 750 R6 750 R5 750 R4 750 R3 750 R2 750 R1 R104 1K R103 1K 2 2 2 2 2 2 7 8 9 3 6 1 7 R230A 8 2 5 100KCC 4 W6 3 U12 DTA144EK 1 3 U11 DTA144EK 1 3 U10 DTA144EK 1 3 U9 DTA144EK 1 1 3 U8 DTA144EK 9 3 6 R206 100K C204 100/10 C203 100/10 5 6 3 2 U1B 7 C206 10P 2068 C205 R205 10P 100K C106 10P 1 U1A -VCC 4 2068 8 +VCC C105 R105 10P 100K SEL SW 2 WIDE PITCH CONTROL (+15% <-> -50%) R135 10KB 4 5 3 1 R207 47K C207 10/16 R107 47K ART T T T T T T T A P • ERRRRRRRR • I BCKKKKKKKKB T C 1 2 3 4 1 2 3 4 H LED -10dBV C107 10/16 1 1 1 1 1 2 3 4 5 6 7 8 9 0 1 2 3 H+VCC R230B R106 100K C104 100/10 C103 100/10 TRIM (0dB <-> 40dB) 1 R130A 2 5 R130B 100KCC 4 1 3 U7 DTA144EK R204 1K R203 1K AGND W2 3 2 1 AGND W1 3 2 1 TRIM (0dB <-> 40dB) MIXER PCB MIXER / JACK PCBs 1 1 4 1 2 5 4 10 2 1 2 3 4 5 6 7 8 PPPPRRRR BBBBEEEE 4 3 2 1 CCCC 1 2 3 4 W7 5 U401C 1 2 U401B 1 3 4 10 2 1 4 U401A -VCC A.B 3 PB 11 1 3 U301C +VCC 4 10 2 4 U301A 5 U301B REC 7 1 A.B 3 PB 11 -VCC REC 7 1 1 2 U201C +VCC A.B 3 1 3 U201B -VCC PB 11 5 10 2 1 4 U201A REC 7 1 1 2 U101C +VCC A.B 3 PB 11 1 3 U101B -VCC REC 7 1 4 U101A +VCC 2 R409 30K D401 -VCC U402 1 DTC144EK 3 R411 12K D402 R309 30K D301 U302 DTC144EK -VCC 1 3 R311 12K D302 R209 30K D201 U202 DTC144EK 3 -VCC 1 D202 R425 47K +VCC C409 10/16 2 3 R109 30K D101 U102 DTC144EK -VCC 1 R211 12K R325 47K +VCC C309 10/16 2 R111 12K D102 R225 47K +VCC C209 10/16 2 R125 47K +VCC C109 10/16 EEEEAAAAP / / / / • • • • • DDDDBBBBM 1 2 3 4 1 2 3 4 U T E R212 100K R312 100K 1 7 6 4560 5 R12 12K U6B R13 47K C14 10/16 -VCC 1 U403 DTC144EK 2 R412 100K U303 DTC144EK 2 -VCC 1 U203 DTC144EK 2 1 2 3 4 5 6 7 8 9 W8 3 1 2 1 -VCC R431 20KA 3 R112 100K U103 DTC144EK 2 -VCC INPUT FADER 3 1 2 R331 20KA 3 INPUT FADER 3 1 2 R231 20KA 3 INPUT FADER 3 1 2 R131 20KA 3 -16.0dBV INPUT FADER C13 22P C12 220P 7 R11 12K 8 2 -VCC R315 47K C313 10/16 R215 47K C213 10/16 R115 47K C113 10/16 C11 22P C10 220P R415 47K C413 10/16 +VCC 12K R10 -10dBV 4560 3 U6A 4 1 U3B +VCC 4560 R426 12K R414 12K 5 6 12K R413 1 U3A -VCC 4 4560 8 +VCC R326 +VCC 12K R314 12K 3 2 12K 7 U2B +VCC 4560 R313 R226 12K R214 12K 5 6 12K R213 1 U2A -VCC 4 4560 8 +VCC (6.0dB) R126 +VCC 12K R114 12K 3 2 12K R113 R427 12K R327 12K R227 12K R127 12K 9 9 9 9 6 6 6 A.B 6 U401D A.B U301D A.B U201D A.B U101D 8 8 8 8 R417 24K PAN R433 50KB R416 24K R317 24K PAN R333 50KB R316 24K R217 24K PAN R233 50KB R216 24K R117 24K PAN R133 50KB R116 24K 4 5 1 3 4 5 1 3 4 5 1 3 4 5 1 3 2 2 2 2 -17.1dBV R419 30K R418 30K R319 30K R318 30K R219 30K R218 30K R119 30K R118 30K L R SS T T AGND 5 6 4560 R421 5.1K C414 R420 10/16 12K R321 5.1K R320 12K C314 10/16 12K R220 C214 10/16 R121 5.1K 1 R221 5.1K C415 10/16 R422 10K 10K R322 2 4 -VCC U304 U404 -VCC OUT1 OUT2 OUT3 OUT4 OUT5 VCC 1 2 3 4 6 9 1 2 3 4 6 9 1 2 3 4 6 9 C2 47/10 5 6 8 C254 22P -VCC +VCC 7 AGND U5B 4556 1 U5A -VCC 4 4556 R252 24K 3 2 +VCC (+6dB) C154 22P R152 24K +VCC 1 2 3 4 6 9 C1 47/10 BA6124 5 GND 7 AMP 8 IN -VCC OUT1 OUT2 OUT3 OUT4 OUT5 VCC BA6124 5 GND 7 AMP IN BA6124 5 GND OUT1 OUT2 OUT3 OUT4 OUT5 VCC U204 7 AMP 8 IN BA6124 5 GND 7 AMP OUT1 OUT2 OUT3 OUT4 OUT5 VCC R251 12K C253 220P U104 5 C153 220P R151 12K -16dBV R134B 6 8 IN 10/16 C315 8 C215 10/16 R222 10K C115 10/16 1 3 MASTER FADER 20KAA -VCC C252 10/16 R134A -10dBV C152 10/16 R122 10K U4B 7 U4A -VCC 4 4560 8 C251 22P R250 68K 3 2 C114 R120 10/16 12K C250 220P C150 220P C151 22P 68K +VCC R150 (+7.1dB) C6 47/10 C5 47/10 D407 D406 D405 D404 D403 D307 D306 D305 D304 D303 D207 D206 D205 D204 D203 D107 D106 D105 D104 D103 H-VCC H+VCC +6dB +3dB 0dB -5dB -10dB HGND CH4 BAR GRAPH +6dB +3dB 0dB -5dB -10dB CH3 BAR GRAPH +6dB +3dB 0dB -5dB -10dB 1 U205 2 R156 16 R255 47K R256 16 DTC314TK 3 R254 1K CH2 BAR GRAPH +6dB +3dB 0dB -5dB -10dB 1 U105 2 DTC314TK 3 R154 1K CH1 BAR GRAPH C156 470/10 R155 47K C256 470/10 R253 47K C255 10/16 R153 47K C155 10/16 -10dBV J4 AGND 1 HGND J7 W3 3 2 1 3 1 2 J6 J5 PUNCH IN/OUT PHONES OUT (16ohm 20mW) JACK PCB (2/2) W4 2 1 J3 3 2 1 STEREO OUT -10dBV TOP SHIELD R L GND R L X-24 5. CIRCUIT & BLOCK DIAGRAMS 23 X-24 24 R/P / REGULATOR PCBs TAPE OUT -10dBV TRK4 TRK3 TRK2 TRK1 RRRR EEEEPPPP CCCCBBBB 4 3 2 1 1 2 3 4 R/P PCB REP EQ TP101 C102 1/50 C107 2.2/50 5 3 C101 560P 6 R102 100K R101 24K 1 0.0082(PP) 2 4 7 8 1 R103 22KB 1 1 4 1 6 3 R110 3.3K 5 R108 180 1 1 1 2 1 3 R113 18K 2 REP EQ 2 U104 DTC114TK 3 C106 47/10 7 3.3K R207 3.3K R107 3.3K +VCC 1 0 2 J7 8 7 6 5 4 3 2 1 J4 1 2 7 8 R131 100 C114 47/10 C117 47/10 R117 2K C115 47/10 C119 10/16 R122 6.2K 3 1 2 L103 U101A 4 3 R125 15K R124 15K C128 0.01(PP) R123 36K R134 2.2K D103 2.2K Q101 3 3 C201 560P 2 R202 100K R201 24K 1 2068 C203 NON 0.0082(PP) 1 4 3 4 6 3 R210 3.3K 5 C209 1/50 R208 180 1 1 1 2 1 3 R213 18K U204 DTC114TK 2 3 1 C206 47/10 7 C216 47/10 R218 2K C214 47/10 1 5 C217 47/10 R217 2K R222 6.2K R220 4.7K 3 R219 2K 1 L203 0.0018(PP) C223 U205 3 C307 2.2/50 3 C301 560P 6 R302 100K R301 24K 1 C305 L301 2 0.0082(PP) 4 7 8 1 R303 22KB 1 3 R305 390K 2 REP LEV R306 470B 1 6 1 4 1 6 3 3 R310 3.3K C309 1/50 R308 180 1 1 5 1 2 1 3 R313 18K U304 DTC114TK 2 3 1 C306 47/10 7 U207 DTC114TK 3 2 R318 2K 4 C314 47/10 1 5 C317 47/10 R317 2K R320 4.7K 3 R319 2K R235 D203 2.2K Q201 C318 0.027(PP) C315 47/10 3 C401 560P 2 R402 100K R401 24K 1 2068 C403 NON 0.0082(PP) R406 470B 1 R403 22KB 1 6 1 4 1 4 6 3 3 R410 3.3K C409 1/50 R408 180 1 1 9 5 1 2 1 3 R413 18K 7 C416 47/10 U307 DTC114TK 3 2 R418 2K 8 4 C414 47/10 1 5 R417 2K R420 4.7K R419 2K C418 0.027(PP) 3 2 5 U404 DTC114TK 2 3 R335 D303 2.2K Q301 1 C406 47/10 D401 C412 4.7/50 1 U407 DTC114TK 3 2 1 LED SW PITCH D+VCC C20 0.01 R10 2 R22 47K 3 C21 0.01 4 P12 P13 P20 P21 P22 P23 K00 K01 K02 K03 KE0 R80 R81 R82 R83 U23 TMP47C200BN D+VCC C22 0.01 6 R24 47K 7 D5 C28 0.1 C23 0.01 8 R25 47K 9 10 R20 47K PUNCH IN/OUT R29 47K R27 10K R30 10K DGND 1 X1 4MHz 2 3 U40 DTC144EK 2 1 DGND U41 DTA144EK 1 U5 3 2 3 4 DTA144EK 1 U7 3 2 5 DTA144EK 2 R41 10K +MVCC 2 1 R42 3.3K -VCC R44 OFF 3 D403 Q401 510 2 1 ON 6 5 4 7 DGND I P R - + BA NL E HA C I Y B I T TRANSPORT 3 3 1 AGND 2 BIAS ADJ 6 1 8 TP1 C426 0.0015(PP) 7 1 C12 22/16 D+VCC 8 R50 20K U30 DTC144EK 3 2 -VCC DOLBY ON/OFF 1 AGND 2 C52 0.022(PP) R51 4.7K 4 Q3 1 R12 REGULATOR PCB R54 C50 100/10 47 C51 0.1(PP) R52 3.3K C55 10/16 R56 4.7K Q2 R53 47K D-VCC U31 L1 150uH R55 33K 3 T1 1 DTC144EK 2 3 DTA144EK 2 C53 0.0047(PP) 7 BGND 1 8 J11 1 2 3 4 C54 0.0047(PP) 1 U8 2 DTA144EK 1 U9 3 2 3 DTA144EK 1 U10 2 3 4 DTA144EK 1 U11 3 2 5 D-VCC +VCC 3 1 U12 2 3 DTA144EK 1 U13 2 3 1 U14 2 1 DTA144EK 3 1 U15 2 3 DTA144EK 1 U16 2 BGND C9 100/10 R38 10K DTA144EK 1 U17 2 3 3 3 DTA144EK 1 U20 2 3 DTA144EK 1 U18 2 3 DTA144EK 1 U21 2 3 DTA144EK 1 U22 2 DTA144EK AGND DTA144EK 1 U19 2 J3 R6 22 D4 D-VCC C7 220/10 D-VCC DGND E EE EA AAA P / / / / • • • • • DDD DB BBBM 1 2 3 4 1 2 3 4 U T E D-VCC 1 2 3 4 5 6 J5 J9 1 C S E H N I T E E L R D J10 U3A 1 4560 2 C5 22/16 6 R8 750 5 1 W1 1 B S O H T I T E O L M D T G R N A D N S P O R T AGND C4 100/10 3 2 1 6 5 4 7 2 7 4560 U3B C3 100/25 1 U2 4 R7 22 D3 3 3 R5 10K R14 4.7 -VCC 1 2 3 4 5 6 7 8 9 R2 390K 8 DGND -VCC J8 J1 1 3 2 POWER SW R4 10K C6 220/10 C8 100/10 1 2 3 4 U1 UPC2410 C2 0.01 R1 820 D+VCC R13 4.7 W11 1 2 3 4 C1 0.01 Q1 D+VCC DTA144EK 1 2 3 4 5 6 7 8 9 -VCC 4 1 R436 22 TP405 R432 1 1 R433 220KB 2 D+VCC 6 S2 C29 0.01 R43 3.3KB 3 R3 20K -VCC DGND PITCH ADJUST Q4 2SK117 1 3 C425 1 220P 3 BGND DTA144EK 1 U6 3 2 R33 47K R40 1M 1 4 TP406 OSC LEVEL DTA144EK R32 10k +MVCC 5 D-VCC +VCC 3 J401 1 2 3 4 5 D+VCC 2 T401 2.2K R11 1 U4 2 3 R31 47K DGND 3 1 AGND TP404 BIAS CURR +MVCC X O DGND U T 3 2 X I N 3 1 R28 47K C25 0.01 R21 10K J2 1 2 1 2 3 4 5 6 7 8 40 41 17 16 15 14 13 12 11 10 9 30 21 D+VCC R26 47K 11 RESET DGND C24 0.01 1 33 2 R40 R41 R42 R43 R50 R51 R52 R53 R91 R92 P10 R73 R72 R71 R70 R63 R62 R61 R60 TEST VSS R23 47K 5 42 VDD 2 R435 D+VCC 19 20 22 23 24 25 26 27 28 29 34 35 36 37 38 R430 10K R434 2.2K 1 D+VCC J6 1 2 3 4 5 6 7 8 9 10 11 12 13 1 U409 0.0018(PP) C423 U405 R431 100 2 DTC114TK D404 D402 A.B REC TRK1 TRK2 TRK3 TRK4 TRK1 TRK2 TRK3 TRK4 A.B BIAS ADJ C326 0.0015(PP) 7 TP306 OSC LEVEL C428 0.01(PP) R423 36K TP305 R332 1 1 1 1 8 L403 R424 15K R333 220KB 2 2 6 R429 6.2K 3 2 3 3 4 180P R425 15K -VCC C325 220P 3 1 R336 22 C421 0.1/50 C422 D+VCC R414 20K R415 20K 4 T301 3 C420 NON 1 U406 DTC114TK 2 REP EQ 2068 C424 2.2/50 U401B 7 J301 1 2 3 4 5 1 1 U408 6 R421 22KB C415 47/10 C413 0.22/50 C408 3900P(PP) C417 47/10 REC LEVEL C419 10/16 2 3 1 R422 6.2K TP304 BIAS CURR D+VCC 2 3 R416 240 6 R331 100 5 U309 3 +VCC 1 0 2 Dolby B U402 HA12135AF 3 2 7 8 1 1 3 R405 390K 2 REP LEV C410 1/50 L402 FB-7G R409 2.2K U401A 4 C404 220P -VCC C405 L401 2 1 R330 10K 2 R334 2.2K D-VCC REP EQ TP401 C407 2.2/50 8 1 D304 C328 0.01(PP) R323 36K 1 +VCC 7 2 C321 0.1/50 1 3 C226 0.0015(PP) DTC114TK 180P D302 C402 1/50 8 L303 R324 15K 1 AGND BIAS ADJ 1 TP206 OSC LEVEL 0.0018(PP) C323 U305 3 2 3 -VCC C322 -VCC 1 3 4 U301A R325 15K TP205 R232 1 1 R233 220KB 2 6 4 1 U306 DTC114TK C225 220P 3 1 R236 22 R329 6.2K 1 2068 3 1 4 1 U308 C324 2.2/50 8 2 R321 22KB C320 NON 2 D+VCC 2 5 T201 +VCC REC LEVEL C319 10/16 2 3 1 R322 6.2K J201 1 2 3 4 5 D+VCC 3 R316 240 8 R314 20K R315 20K C312 4.7/50 D301 C316 47/10 6 C313 0.22/50 C308 3900P(PP) 2 REP EQ 9 Dolby B U302 HA12135AF 3 2 U301B C304 220P C303 NON C310 1/50 L302 FB-7G R309 2.2K 1 7 2068 2 R234 2.2K 1 5 TP204 BIAS CURR 2 U209 D-VCC C302 1/50 R230 10K D204 C228 0.01(PP) R223 36K D202 +VCC 1 0 2 1 180P R224 15K 1 R231 100 2 DTC114TK R229 6.2K 1 REP EQ TP301 C126 0.0015(PP) 7 TP106 OSC LEVEL 3 D+VCC 2 1 8 C221 0.1/50 C222 R225 15K -VCC 1 2068 5 C224 2.2/50 U201B 7 6 R221 22KB C220 NON 2 1 AGND BIAS ADJ 1 U208 2 3 1 U206 DTC114TK C218 0.027(PP) C215 47/10 C219 10/16 3 2 REC LEVEL 8 4 3 3 R216 240 6 R214 20K R215 20K C212 4.7/50 D201 +VCC 1 0 2 C213 0.22/50 C208 3900P(PP) 2 REP EQ 9 Dolby B U202 HA12135AF 3 7 8 1 R203 22KB 1 3 R205 390K R206 2 470B REP LEV 1 6 1 2 U201A 4 C204 220P -VCC C205 L201 2 R209 2.2K 1 1 C210 1/50 L202 FB-7G ERASE CURR TP105 R132 1 1 C125 220P 3 R133 220KB 2 4 6 D-VCC REP EQ TP201 C207 2.2/50 1 4 1 R136 22 1 8 2 5 T101 R135 U107 DTC114TK 3 2 3 J101 1 2 3 4 5 D+VCC U109 1 +VCC 2 D104 D102 C202 1/50 R130 10K 180P 0.0018(PP) C123 U105 1 C121 0.1/50 -VCC C122 TP104 BIAS CURR DTC114TK R129 6.2K 1 2068 C120 NON 1 U106 DTC114TK C118 0.027(PP) D+VCC 1 2 3 1 2 1 U108 C124 2.2/50 8 R121 22KB R120 4.7K 3 R119 2K 2 -VCC 2 +VCC REC LEVEL (-6.9dBV) R118 2K 8 1 5 5 6 3 R116 240 6 4 3 4 AGND C116 47/10 R114 20K R115 20K C112 4.7/50 D101 R307 C113 0.22/50 C108 3900P(PP) 1 9 3.3K Dolby B U102 HA12135AF 3 C109 1/50 3 R105 390K 2 REP LEV R106 470B 1 6 3 U101B C104 220P C105 L101 2 7 2068 C103 NON R109 2.2K 1 C110 1/50 L102 FB-7G R407 C2 470/25 S1 8 AGND D1 DC IN (12V 600mA) 2 G 1 O U T I N 3 BLOCK DIAGRAM LINE OUT -10dBV LINE IN/INSERT -10dBV 1 INPUT FADER TIP: RTN RING: SEND LINE IN/INSERT -10dBV -10dBV -10dBV REC A. B REC PB REC TRK 2 1 PAN INPUT FADER 2 3 REC TRK 3 REC A. B REC PB 4 PAN TAPE OUT -10dBV INPUT FADER TIP: RTN RING: SEND PHONES OUT BARGRAPH REC A. B REC PB REC A. B REC PB 4 MASTER FADER 16 ohm 20mW REC A. B REC PB 3 L R PAN INPUT FADER TIP: RTN RING: SEND LINE IN/INSERT REC TRK 1 REC A. B REC PB 2 TIP: RTN RING: SEND LINE IN/INSERT PAN REC A. B REC PB REC TRK 4 REC A. B REC PB 1 2 3 4 MIC IN 1/3 -10dBV <--> -50dBV TRIM 2 3 1 MIC IN 2/4 -10dBV <--> -50dBV TRIM 2 3 1 X-24 25 FOSTEX CORPORATION 3-2-35 Musashino, Akishima, Tokyo, Japan 196-0021 FOSTEX CORPORATION OF AMERICA 15431 Blackburn Ave., Norwalk, CA 90650, U.S.A. © PRINTED IN JAPAN JUNE 1998 8288772000