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MDX-C8900R SERVICE MANUAL AEP Model UK Model Model Name Using Similar Mechanism MDX-C7900R Base Mechanism Type MG-164KE-138 Optical Pick-Up Name KMS-241B/J2N SPECIFICATIONS FM/MW/LW MINIDISC PLAYER MICROFILM...
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LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY.
TABLE OF CONTENTS GENERAL ELECTRICAL ADJUSTMENTS Location of Controls ............4 Test Mode ................ 25 MD Section ..............25 Resetting the Unit ............5 Detaching the Front Panel ..........5 Tuner Section ..............25 Preparing the Rotary Commander ........5 Setting the Clock .............
SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. SUB PANEL ASS’Y 2 two claws 4 sub panel ass’y 1 three screws (PTT2.6 × 6) 2 claw 3 connector 1 screw (CN701) (PTT2.6 × 6) MECHANISM DECK (MG-164KE-138) 1 two screws (PTT2.6 ×...
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AUDIO BOARD 4 AUDIO board 1 two screws (PTT2.6 × 10) 2 Bend two claws of bracket (AUDIO) in the direction of arrows. 3 connector (CN803) bracket (AUDIO) SERVO BOARD 3 two screws (BVTT2 × 4) 3 two screws (BVTT2 × 4) 4 servo board 2 flexible board 1 sensor flexible board...
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MAIN BOARD 6 six screws (PTT2.6 × 10) 1 two screws (PTT2.6 × 10) 3 shield plate (2) 2 three ground point screws 7 Remove the heat sink in the direction of the arrow. 4 MAIN board 5 insulating sheet FLOAT BLOCK 5 Pushing an arrow A part, raise the float block up ward at the...
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HOLDER ASS’Y 5 holder ass’y 4 washer (M) 1 spring (CHKG) 2 stop ring E (1.5) 3 lever (lock R) 1 spring (CHKG) 3 lever (lock L) 2 stop ring E (1.5) OPTICAL PICK-UP (KMS-241B/J2N) 4 screw (B2 × 3) 6 bearing (SL) 5 feed screw ass’y 7 optical pick-up...
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MOTOR ASS’Y (M901, M902, M903), SENSOR BOARD 4 screw (P1.7 × 1.8) 9 two screws (P1.7 × 1.8) 5 bracket (SL) 2 two screws (2 × 8) 0 spindle motor 6 sled motor ass’y ass’y (M901) (M902) 3 sensor board 7 screw (B2 ×...
SECTION 3 ELECTRICAL ADJUSTMENTS TEST MODE TUNER SECTION 0 dB=1µV This set have the test mode function. In the test mode, FM Auto Scan/Stop Level and MW Auto Scan/Stop Level adjustments can Cautions during repair be performed easier than it in ordinary procedure. When the tuner unit is defective, replace it by a new one be- cause its internal block is difficult to repair.
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FM Stereo Separation Adjustment (Wide) FM Stereo Separation Adjustment (Narrow) Setting: Setting: [SOURCE] [SOURCE] button : FM button : FM FM RF signal FM RF signal level meter level meter antenna jack (CN1) antenna jack (CN1) generator generator 0.01 µ F 0.01 µ...
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FM RDS S-Meter Adjustment MW Auto Scan/Stop Level Adjustment Setting: Setting: [SOURCE] [SOURCE] [MODE] button : FM button : MW FM RF signal 30 Ω 15 pF generator antenna jack (CN1) 65 pF 0.01 µ F AM RF signal generator Carrier frequency : 98.00 MHz : 35 dB (56.2 µ...
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Adjustment Location: – SET UPPER VIEW – RV1 MW Auto Scan/Stop Level Adjustment RV2 FM Auto Scan/Stop Level Adjustment RV3 FM Stereo Separation Adjustment (Wide) RV4 FM Stereo Separation Adjustment (Narrow) RV1 FM RDS S-Meter Adjustment Front – 28 –...
MDX-C8900R R-CH COM +8V CN602 (1/2) • SIGNAL PATH CENTER VOLTAGE AUDIO IN : MD PLAY GENERATOR (FOR BIAS) 4-3. BLOCK DIAGRAM – MAIN Section – R-CH INPUT SELECT, IC402 ELECTRICAL VOLUME : FM IC400 (1/2) : AM ELECTRICAL CN602 (2/2)
4-6. NOTES FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS Note on Schematic Diagram: Note on Printed Wiring Board: • X : parts extracted from the component side. • All capacitors are in µF unless otherwise noted. pF: µµF • Y : parts extracted from the conductor side. 50 WV or less are not indicated except for electrolytics and tantalums.
MDX-C8900R • Voltages and waveforms are dc with respect to Note: The components identified by mark ! or dotted line ground in playback mode. with mark ! are critical for safety. no mark : MD Replace only with part number specified.
MDX-C8900R 4-9. SCHEMATIC DIAGRAM – SERVO Section (2/3) – • See pages 74 for IC Block Diagrams. • See page 72 for Waveforms. (Page 44) (Page 47) • Voltages and waveforms are dc with respect to ground in playback mode.
MDX-C8900R • Voltages and waveforms are dc with respect to ground in playback mode. no mark : MD 4-10. SCHEMATIC DIAGRAM – SERVO Section (3/3) – • See page 72 for Waveforms. ∗ : Impossible to measure (Page 53) (Page 46) –...
MDX-C8900R 4-13. SCHEMATIC DIAGRAM – MAIN Section (1/4) – • See pages 77 for IC Block Diagrams. (Page 64) (Page 48) (Page 55) (Page 58) (Page 59) • Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions.
MDX-C8900R 4-14. SCHEMATIC DIAGRAM – MAIN Section (2/4) – • See page 77 for IC Block Diagrams. (Page 54) (Page 60) • Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM ) : MW ] : LW 〈〈...
MDX-C8900R 4-15. SCHEMATIC DIAGRAM – MAIN Section (3/4) – • See pages 77 for IC Block Diagrams. • See page 73 for Waveforms. (Page 53) (Page 59) • Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions.
MDX-C8900R 4-16. SCHEMATIC DIAGRAM – MAIN Section (4/4) – • See page 77 for IC Block Diagrams. • See page 73 for Waveforms. (Page 54) (Page 55) (Page 71) (Page 58) • Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions.
MDX-C8900R 4-18. SCHEMATIC DIAGRAM – AUDIO Section – • See page 80 for IC Block Diagrams. • See page 73 for Waveform. (Page 53) • Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM –...
MDX-C8900R 4-20. SCHEMATIC DIAGRAM – PANEL Section – • See page 73 for Waveform. (Page 71) • Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. no mark : FM – 67 – – 68 –...
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IC403 CXA1846AN-T4 IC504 BA8270F-E2 BUS ON BUS ON SWITCH RESET SWITCH – BUS ON 8dB STEP 1dB STEP VOLUME VOLUME CLK IN BATTERY BATT BU IN SWITCH LATCH BUFFER LATCH CONTROL VREF DATA DATA IN SHIFT DATA OUT REGISTER 8dB STEP 1dB STEP VOLUME VOLUME...
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IC702 MSM6585JSDR1 TEST TIMING RS/A REFRESH TIMER RWCK GENERATOR RFSH TEST TEST REFRESH ADDRESS 8,388,608DATA COUNTER REGISTER TEST TEST ROW ADDRESS COLUMN DECODER COUNTER ROW ADDRESS REGISTER COLUMN ADDRESS COUNTER WRITE CLOCK GENERATOR DOUT IC703 MSM6688GS-2K TIMING DATA CONTROLLER MCU I/F REGISTER SADX CONTROLLER...
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– AUDIO Board – IC901 RSC-164 PORT 0 INTERNAL ROM 32 X 8 (HIGH) BUFFER INTERNAL ROM 32 X 8 (LOW) REGISTER STACK SPACE SPACE ANALOG CONTROL INTERNAL BUS AIN1 AIN0 AGND PULSE WIDTH INTERRUPT BUFOUT/PWM0 MODULATOR LOGIC TEST/PWM1 AVDD EXTERNAL MEMORY RESET INTERFACE...
4-23. IC PIN FUNCTION DESCRIPTION • SERVO BOARD IC301 CXD2652AR (DIGITAL SIGNAL PROCESSOR, DIGITAL SERVO PROCESSOR, EFM/ACIRC ENCODER/DECODER, SHOCK PROOF MEMORY CONTROLLER, ATRAC ENCODER/DECODER, 2M BIT D-RAM) Pin No. Pin Name Function Focus OK signal output to the MD mechanism controller (IC501) MNT0 “H”...
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Pin No. Pin Name Function DVSS — Ground terminal (digital system) Output enable signal output to the D-RAM (IC307) “L” active XCAS Column address strobe signal output to the D-RAM (IC307) “L” active Address signal output to the D-RAM (IC307) XRAS Row address strobe signal output to the D-RAM (IC307) “L”...
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Pin No. Pin Name Function DVDD — Power supply terminal (+3.3V) (digital system) FFDR Focus servo drive PWM signal (+) output to the BH6511FS (IC303) FRDR Focus servo drive PWM signal (–) output to the BH6511FS (IC303) Clock signal (176.4 kHz) output terminal (X’tal system) Not used (open) SRDR Sled servo drive PWM signal (–) output to the BH6511FS (IC303) SFDR...
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• SERVO BOARD IC302 CXA2523R (RF AMP, FOCUS/TRACKING ERROR AMP) Pin No. Pin Name Function I-V converted RF signal I input from the optical pick-up block detector I-V converted RF signal J input from the optical pick-up block detector Middle point voltage (+1.65V) generation output terminal 4 to 9 A to F Signal input from the optical pick-up detector...
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“L”: reset Bus on/off control signal output to the MD mechanism controller (IC501) and SONY bus BUS-ON interface (IC504) “L”: bus on Reset signal output to the MD mechanism controller (IC501) and SONY bus interface (IC504) “ SYSRST L”: reset DOORSW Front panel open/close detection signal input “L”...
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Pin No. Pin Name Function TIR-IND LED drive signal output of the TIR indicator (LED701) “H”: LED on LCDINH Blank indicate control signal output to the liquid crystal display driver (IC900) “L”: no display — Ground terminal — Connected to coupling capacitor for the power supply A/D converter power control signal output When the KEYACK (pin &§) that controls reference AD-ON voltage power for key A/D conversion input is active, “L”...
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Input of acknowledge signal for the key entry Acknowledge signal is input to accept function KEYACK and eject keys in the power off status On at input of “H” Battery detect signal input from the SONY bus interface (IC504) and battery detect circuit BU-IN “L” is input at low voltage...
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Pin No. Pin Name Function Not used (open) LINKOFF Not used (pull down) Not used (open) Not used (open) Not used (pull down) Not used (open) Not used (open) CSV-NAR “H” is input when RS-164 (IC901) sends data Illumination LED drive signal output terminal “H”: LED on LED-ON Also, power amp (IC600) standby on/off control is executed “L”: standby, “H”: amp on —...
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Two way data bus with the external EEPROM device Not used (open) MD-SO Writing serial data signal output to the CXD2652AR (IC301) and CXA2523R (IC302) Unilink on/off control signal output to the SONY bus interface (IC504) LINKOFF “H”: link off, “L”: link on...
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Pin No. Pin Name Function UNIREQ Data request signal output terminal (for SONY bus) “H”: request on Not used (open) UNICKI Serial data transfer clock signal input from the master controller (IC500) (for SONY bus) UNISI Serial data input from the SONY bus interface (IC504)
SECTION 5 EXPLODED VIEWS NOTE: • Items marked “*” are not stocked since they • -XX and -X mean standardized parts, so they The components identified by mark ! or dotted line with mark may have some difference from the original are seldom required for routine service.
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(2) FRONT PANEL SECTION not supplied (KEY board) not supplied not supplied EL900 LCD900 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3375-960-1 PANEL SUB ASSY, FRONT * 63 3-022-327-01 PLATE (LCD), GROUND 3-022-332-01 BUTTON (10 KEY) 1-694-414-11 CONDUCTOR BOARD, CONNENTION (SHIFT.
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(3) MECHANISM DECK SECTION-1 (MG-164KE-138) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 101 A-3317-122-A SERVO BOARD, COMPLE * 110 3-919-280-01 LEVER (LOCK R) * 102 X-3369-440-1 CHASSIS ASSY, MD 3-919-281-01 SPRING (CHKG) 3-919-296-01 SPRING (FL), TENSION * 112 X-3375-444-1 COVER ASSY (2), MD 3-921-111-01 SPRING (FL2), TENSION...
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(4) MECHANISM DECK SECTION-2 (MG-164KE-138) 168 167 M903 M901 M902 The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part num- ber specified. Ref. No. Part No. Description Remark Ref. No. Part No.
SECTION 6 AUDIO ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark ! or dotted line with mark parts list may be different from the parts speci- are seldom required for routine service.
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AUDIO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R916 1-216-821-11 METAL CHIP 1/16W < CONNECTOR > R917 1-216-830-11 METAL CHIP 5.6K 1/16W R918 1-216-833-11 METAL CHIP 1/16W CN900 1-778-183-11 PLUG, CONNECTOR 18P R919 1-218-727-11 METAL CHIP 0.5% 1/16W R920...
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MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < RESISTOR > A-3294-510-A MAIN BOARD, COMPLETE (AEP, UK) A-3294-513-A MAIN BOARD, COMPLETE (German) R901 1-216-045-00 METAL CHIP 1/10W ********************* R902 1-216-045-00 METAL CHIP 1/10W R903 1-216-045-00 METAL CHIP 1/10W 3-011-078-01 BRACKET (POWER IC) R904...