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PMC-MD55 SERVICE MANUAL US Model Canadian Model Ver 1.1 1999. 08 AEP Model UK Model Model Name Using Similar Mechanism U.S. and foreign patents licensed form Dolby Laboratories Licensing Corporation. CD Mechanism Type KSM-213CGP Section Optical Pick-up Name KSS-213C Model Name Using Similar Mechanism...
DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- ELECTRICAL PARTS LIST ......128 POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY. – 2 –...
SECTION 1 SERVICING NOTES SAFETY CHECK-OUT CAUTION After correcting the original service problem, perform the follow- Use of controls or adjustments or performance of procedures ing safety check before releasing the set to the customer: other than those specified herein may result in hazardous ra- Check the antenna terminals, metal trim, “metallized”...
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JIG FOR CHECKING BD BOARD WAVEFORM The special jig (J-2501-149-A) is useful for checking the waveform of the BD board. The names of terminals and the checking items to be performed are shown as follows. GND : Ground I+3V : For measuring IOP (Check the deterioration of the optical pick-up laser) IOP : For measuring IOP (Check the deterioration of the optical pick-up laser) TEO : TRK error signal (Traverse adjustment) VC : Reference level for checking the signal...
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CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTS (for MD Section) Before performing repairs, perform the following checks to determine the faulty locations up to a certain extent. Details of the procedures are described in “5 Electrical Adjustments”. Criteria for Determination Measure if unsatisfactory: (Unsatisfactory if specified value is not satisfied) Laser power check...
SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. Rear cabinet Front cabinet block Upper cabinet block CD PICK-UP assy Main board section Main board TU block, MD block MD mechanism deck Slider (CAM) Base unit (MBU-5A), BD board SW board, loading motor (M103) Note: Follow the disassembly procedure in the numerical order given.
SECTION 4 TEST MODE Refer to “5. ELECTRICAL ADJUSTMENT” for the test mode of CD section. MD SECTION 1. PRECAUTIONS FOR USE OF TEST MODE • As loading related operations will be performed regardless of the test mode operations being performed, be sure to check that the disc is stopped before setting and removing it.
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5. SELECTING THE TEST MODE There are 9 types of test modes as shown below. The mode can be switched by turning the JOG dial. After selecting the mode to be used, [YES, ENTER] press the button. Display Contents TEMP ADJUST Temperature compensation offset adjustment LDPWR ADJUST Laser power adjustment...
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5-1. Operating the Continuous Playback Mode 1. Entering the continuous playback mode (1) Set the disc in the unit. (Whichever recordable discs or discs for playback only are available) (2) Turn the JOG dial and display “CPLAY MODE”. [YES, ENTER] (3) Press the button to change the display to “CPLAY MID”.
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6. FUNCTIONS OF OTHER BUTTONS Function Contents Sets continuous playback when pressed in the STOP state. When pressed during continuous playback, 7, MD and EDIT the tracking servo turns ON/OFF. s (MD) and EDIT Stops continuous playback and continuous recording. The sled moves to the outer circumference only when this is pressed.
SECTION 5 ELECTRICAL ADJUSTMENTS AM IF ADJUSTMENT TUNER SECTION 0 dB=1 µV Adjust for a maximum reading on level meter [AM (MW/LW)] 450 kHz Setting: Function : RADIO AM VT VOLTAGE CONFIRMATION (US, Canadian) BAND switch: AM (MW/LW) Frequency Display Reading on Digital Voltmeter Put the lead-wire + 0.8...
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Adjustment Location: – TU BOARD (Component Side) – FM tracking Adjustment (US, Canadian) MW Tracking Adjustment (AEP, UK) FM VT Voltage Adjustment (US, Canadian) LW Tracking Adjustment (AEP, UK) AM IF Adjustment CT5 LW VT Voltage Adjustment (AEP, UK) MW VT Voltage Adjustment AM Tracking Adjustment (AEP, UK) (US, Canadian)
MD SECTION 1. PARTS REPLACEMENT AND ADJUSTMENT • Check and adjust the mechanism deck as follows. The procedure changes according to the part replaced. • Abbreviation : Optical pick-up OWH : Overwrite head • Laser power check • Focus bias check •...
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2. PRECAUTIONS FOR CHECKING LASER DIODE 4. Use the following tools and measuring devices. • Check Disc (MD) TDYS-1 EMISSION (Part No. 4-963-646-01) To check the emission of the laser diode during adjustments, never • Test Disc (MDW-74/AU-1) (Part No. 8-892-341-41) view directly from the top as this may lose your eye-sight.
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6. CHECK PRIOR TO REPAIRS 6-2. Focus Bias Check Change the focus bias and check the focus tolerance amount. These checks are performed before replacing parts according to Checking Procedure : “approximate specifications” to determine the faulty locations. For 1. Load the test disk (MDW-74/AU-1). details, refer to “Checks Prior to Parts Replacement and Adjust- 2.
7. TEMPERATURE COMPENSATION OFFSET 7. Then, turn the JOG dial to display “LDPWR CHECK”. [YES, ENTER] 8. Press the button once to display “LD 0.9 mW ADJUSTMENT ”. Check that the reading of the laser power meter become Save the temperature data at that time in the non-volatile memory 0.85 to 0.91 mW.
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9. EF BALANCE ADJUSTMENT 8. Turn the JOG dial so that the waveform of the oscilloscope becomes the specified value. (When the JOG dial is turned, the of “EFB- ” changes Note 1:Data will be erased during MO reading if a recorded disc is used in this adjustment.
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[YES, ENTER] 11. ERROR RATE CHECK 17. Press the button, display “EFB = SAVE” for a moment and save the adjustment results in the non-vola- tile memory. 11-1. CD Error Rate Check Next “EFBAL ADJUST” will be displayed. Checking Procedure : [MD EJECT 18.
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Adjustment Location: – BD BOARD (Component Side) – CN101 D101 CN110 I+3V NOTE IC171 – BD BOARD (Conductor Side) – IC101 IC121 IC192 Note: It is useful to use the jig for checking the waveform. (Refer to Ser- vicing Notes on page 4) –...
Display CD SECTION Set the CD test mode when performing confirmations. After completing the confirmation, release the CD test mode. XX XXX In the CD test mode, the set works as following sequence. CD test mode sequence: 1. Enter the CD test mode 2.
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4. ALL SERVO ON Mode 1 6. Releasing the CD Test Mode (RF Level and Jitter Confirmation 1) 1. Press the (CD) button to stop rotate the disc. [POWER] [RESET] 2. Press the button or switch (bottom of the 1. Press the button four times to enter the ALL SERVO player unit) to release the CD test mode and turn to standby ON mode 1 (start playback the disc) and display as below.
DISPLAY SECITON Dimmer Adjustment Connection: digital voltmeter LCD board TP (DIMMER) TP (GND) – 1. Connect a digital voltmeter to TP (DIMMER) and TP (GND) on the LCD board. 2. Adjust RV550 so that the value of digital voltmeter becomes 2.83 V.
PMC-MD55 SECTION 6 DIAGRAMS 6-1. BLOCK DIAGRAM – TUNER Section – TU BOARD (AEP, UK) FM TUNER UNIT FM EXT IF OUT ANTENNA 10.7MHz IF, DET, FM MPX (AEP, UK) OSC OUT IC1 (2/2) FM/AM FRONT-END (US, CND) IC1 (1/2)
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• Circuit Bords Location – Player Unit – SW board CD O/C board SW (TOP) board CD MOTOR board LAMP board AU/JACK board TU board SW (FRONT) board LCD board MAIN board BD board DG board LINE IN board – Speaker (L) Section – POWER board POWER AMP (C) board POWER AMP (A) board...
PMC-MD55 6-9. SCHEMATIC DIAGRAM – BD Section – • See page 99 for Waveforms. • See page 102 for IC Block Diagrams. (Page 54) (Page 61) (Page 61) Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF •...
PMC-MD55 6-14. SCHEMATIC DIAGRAM – MAIN (CD) Section – • See page 100 for Waveforms. • See page 105 for IC Block Diagrams. (Page 70) (Page 73) (Page 79) Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
PMC-MD55 6-16. SCHEMATIC DIAGRAM – MAIN (FUNCTION SELECT) Section – (Page 69) (Page 70) (Page 77) (Page 77) (Page 72) (Page 70) Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF • Voltages are taken with a VOM 50 WV or less are not indicated except for electrolytics (Input impedance 10 MΩ).
PMC-MD55 6-19. SCHEMATIC DIAGRAM – CD MOTOR Section – • See page 107 for IC Block Diagram. (Page 67) Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
PMC-MD55 6-22. SCHEMATIC DIAGRAM – CD OPEN/CLOSE Section – • See page 107 for IC Block Diagram. (Page 72) Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
PMC-MD55 6-24. SCHEMATIC DIAGRAM – PANEL Section – (Page 72) (Page 72) (Page 72) Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
PMC-MD55 6-26. SCHEMATIC DIAGRAM – POWER AMP/POWER Section – (Page 78) Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums. • All resistors are in Ω and W or less unless otherwise specified.
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PMC-MD55 6-28. SCHEMATIC DIAGRAM – SUPER WOOFER Section – • See page 107 for IC Block Diagram. (Page 78) Note on Schematic Diagram: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.
• IC Block Diagrams – TU Board – IC1 TA2104AN GND1 FM RF OUT FM RF VCC1 FM RF IN AM RF IN AM LOW OUT MIX OUT FM OSC AM OSC BUFF VCC2 BUFF OSC OUT LEVEL AM IF AM IF IN ST IND IF BUFF...
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IC701 CXA2542AQ PD1 IV SUMMING PD2 37 SENS2 PD2 IV LASER POWER CONTROL ↓ SENS1 F IV AMP FE AMP C. OUT E IV AMP LEVEL S FO. BIAS XRST WINDOW COMP. ↓ MIRR TRK. GAIN DATA WINDOW COMP. ↓ E-F BALANCE WINDOW COMP.
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IC702 CXD3009Q 59 58 57 56 55 54 46 45 44 DIGITAL DEMODULATOR SERIAL-IN INTERFACE 40 LRCKI VDD3 SYSM D / A ERROR D / A INTERFACE INTERFACE CORRECTOR 39 LRCK AVSS 38 ASYO AVDD 37 ASYI ASYMMETRY CORRECTOR AOUT1 36 BIAS 16K RAM 35 RF...
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6-29. IC PIN FUNCTION DESCRIPTION • BD BOARD IC101 CXA2523AR (RF AMP, FOCUS/TRACKING ERROR AMP) Pin No. Pin Name Description 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...
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• BD BOARD IC121 CXD2654R (DIGITAL SIGNAL PROCESSOR, DIGITAL SERVO SIGNAL PROCESSOR, EFM/ACIRC ENCODER/DECODER, SHOCK PROOF MEMORY CONTROLLER, ATRAC ENCODER/DECODER) Pin No. Pin Name Description Focus OK signal output to the MD mechanism controller (IC601) MNT0 (FOK) “H” is output when focus is on (“L”: NG) MNT1 (SHOCK) Track jump detection signal output to the MD mechanism controller (IC601) MNT2 (XBUSY)
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Pin No. Pin Name Description XRAS Row address strobe signal output to the D-RAM (IC124) “L” active Write enable signal output to the D-RAM (IC124) “L” active Two-way data bus with the D-RAM (IC124) I (S) MVCI Digital in PLL oscillation input from the external VCO Not used (fixed at “L”) ASYO Playback EFM full-swing output terminal ASYI...
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Pin No. Pin Name Description SRDR Sled servo drive PWM signal (–) output to the BH6511FS (IC152) SFDR Sled servo drive PWM signal (+) output to the BH6511FS (IC152) SPRD Spindle servo drive PWM signal (–) output to the BH6511FS (IC152) SPFD Spindle servo drive PWM signal (+) output to the BH6511FS (IC152) I (S)
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• MAIN BOARD IC405 CXP740096-032Q (SYSTEM CONTROLLER) Pin No. Pin Name Description Function select signal output for the MD playback signal “L”: MD, “H”: other function Function select signal output for the tuner/line input signal RADIO/LINE “L”: tuner/line in, “H”: other function AC-CHK AC power supply detection signal input “L”: AC in...
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Pin No. Pin Name Description SELECT Destination setting terminal AVSS — Ground terminal (for A/D converter) AVREF Reference voltage (+3.3V) input terminal (for A/D converter) AVDD — Power supply terminal (+3.3V) (for A/D converter) LED drive signal output of the PRESET/AMS indicator (D553) “H”: LED on LED-PRESET/AMS LED-SELECT LED drive signal output of the SELECT indicator (D554) “H”: LED on...
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Pin No. Pin Name Description AU-CLK Serial data transfer clock signal output to the electrical volume (IC351) Back light lamp (PL553 to PL555) drive signal output for the liquid crystal display (LCD500) B/L CONT “L”: lights down (standby), “H”: lights up (power on) PA-STANDBY Power amp on/off control signal output “L”: standby, “H”: power on AMUTE...
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• DG BOARD IC601 RU8X12MF-0031 (MD MECHANISM CONTROLLER) Pin No. Pin Name Description 1, 2 DAOUT0, DAOUT1 Not used (open) 3 to5 KEY0 to KEY2 Key input terminal (A/D input) Not used (fixed at “H”) Detection input from the disc chucking-in detect switch “L”: chucking CHACK-IN Not used (fixed at “H”)
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Pin No. Pin Name Description +3.3V — Power supply terminal (+3.3V) SNG/CHG — Not used (fixed at “L”) 50, 51 JOG1, JOG0 JOG dial pulse input Not used (fixed at “L”) Two-way data bus with the EEPROM (IC171) Clock signal output to the EEPROM (IC171) Select whether D-RAM capacitance 2M bit or 4M bit “L”: 4M bit (external D-RAM), 2M/4M “H”: 2M bit (internal D-RAM of IC121 CXD2654R) (fixed at “H”...
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Pin No. Pin Name Description REC/PB Not used (open) — Not used (open) Recording data output enable signal output to the CXD2654R (IC121) and overwrite head SCTX driver (IC181) Writing data transmission timing output (Also serves as the magnetic head on/off output) XLATCH Serial data latch pulse signal output to the CXD2654R (IC121)
SECTION 7 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark 0 are may have some difference from the original are seldom required for routine service.
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(2) FRONT CABINET SECTION supplied 54 59 not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-027-660-03 DIAL, JOG X-3378-139-1 CABINET (FRONT) SUB ASSY (WOOD) 3-036-268-01 SHEET (JOG) (AEP, UK) X-3377-446-1 PANEL ASSY, FRONT 4-951-620-01 SCREW (2.6X8), +BVTP 3-036-303-02 WINDOW (LCD) * 57 A-3323-216-A SW (FRONT) BOARD, COMPLETE...
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(4) MD MECHANISM SECTION (MDM-5A) M103 MBU-5A Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-671-115-21 SW BOARD 4-996-227-01 LEVER (HEAD) * 152 4-996-217-01 CHASSIS 4-996-229-01 SPRING (HEAD LEVER), TORSION 4-996-223-11 INSULATOR (F) (BLACK) 4-996-212-01 LEVER (LIMITTER) * 154 4-996-218-01 BRACKET (GUIDE R) 4-996-213-01 SPRING (LIMITTER), TORSION...
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(5) BASE UNIT SECTION (MBU-5A) HR901 not supplied not supplied M101 S102 M102 The components identified by Les composants identifiés par une mark 0 or dotted line with marque 0 sont critiques pour la mark 0 are critical for safety. sécurité.
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(6) CD CABINET SECTION M703 not supplied OPTICAL PICK UP SECTION supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 251 A-3321-990-A SW (TOP) BOARD, COMPLETE 3-036-288-01 PLATE (GEAR), RETAINER 4-951-620-01 SCREW (2.6X8), +BVTP * 270 A-3321-992-A CD O/C BOARD, COMPLETE (US, CND) * 253 1-790-786-11 WIRE, PARALLEL (FFC) 8P...
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(7) OPTICAL PICK-UP SECTION (KSM-213CGP) not supplied not supplied M1002 M1001 The components identified by Les composants identifiés par une mark 0 or dotted line with marque 0 sont critiques pour la mark 0 are critical for safety. sécurité. Replace only with part num- Ne les remplacer que par une pièce ber specified.
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(8) SPEAKER (L) SECTION SP391 not supplied not supplied POWER AMP (D) board US, CND supplied supplied POWER AMP AEP, UK (A) board POWER AMP (C) board The components identified by Les composants identifiés par une mark 0 or dotted line with marque 0 sont critiques pour la POWER AMP mark 0 are critical for safety.
(10) SUPER WOOFER SECTION supplied SP800 not supplied US, CND not supplied supplied AEP, UK WOOFER AMP (A) board WOOFER AMP (B) board The components identified by Les composants identifiés par une mark 0 or dotted line with marque 0 sont critiques pour la mark 0 are critical for safety.
SECTION 8 AU/JACK ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by 0 or dotted line with mark mark are seldom required for routine service. parts list may be different from the parts speci- 0 are critical for safety.
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CD MOTOR Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < TRANSISTOR > R165 1-216-097-00 RES, CHIP 100K 1/10W R166 1-216-298-00 METAL CHIP 1/10W Q101 8-729-028-91 TRANSISTOR RT1P441M-TP-1 R167 1-216-065-00 RES, CHIP 4.7K 1/10W Q102 8-729-026-53 TRANSISTOR 2SA1576A-T106-QR R169 1-219-724-11 METAL CHIP...
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CD MOTOR CD O/C Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R1003 1-216-073-00 METAL CHIP 1/10W R759 1-216-089-00 RES, CHIP 1/10W R1004 1-216-081-00 METAL CHIP 1/10W R1005 1-216-099-00 METAL CHIP 120K 1/10W 0 R761 1-212-954-11 FUSIBLE 1/2W F R779 1-216-041-00 METAL CHIP...