Sony CDX-737 Service Manual
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Sony CDX-737 Service Manual

Sony CDX-737 Service Manual

Compact disc changer
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See also: Operating Instructions
SERVICE MANUAL
MICROFILM
CDX-737
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
COMPACT DISC CHANGER
US Model
Canadian Model
AEP Model
UK Model
E Model
NEW
MG-250D-137
KSS-521A/J2N

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Summary of Contents for Sony CDX-737

  • Page 1 CDX-737 SERVICE MANUAL US Model Canadian Model AEP Model UK Model E Model Model Name Using Similar Mechanism CD Drive Mechanism Type MG-250D-137 Optical Pick-up Name KSS-521A/J2N SPECIFICATIONS COMPACT DISC CHANGER MICROFILM...

  • Page 2: Table Of Contents

    OPERATION. REPLACE THESE COMPONENTS WITH DE FONCTIONNEMENT. NE REMPLACER CES COM- SONY PARTS WHOSE PART NUMBERS APPEAR AS POSANTS QUE PAR DES PIÈCES SONY DONT LES SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- NUMÉROS SONT DONNÉS DANS CE MANUEL OU LISHED BY SONY.

  • Page 3: Servicing Notes

    SECTION 1 SECTION 2 This section is extracted from SERVICING NOTES GENERAL instruction manual. DISC MAGAZINE GETTING OUT PROCEDURE NOTES ON HANDLING THE OPTICAL PICK- ON THE POWER SUPPLY IS OFF UP BLOCK OR BASE UNIT Remove the CASE (LOWER) assembly beforehand The laser diode in the optical pick-up block may suffer electro- static breakdown because of the potential difference generated by 1) Press the lever (ML) assy to arrow direction.

  • Page 5: Disassembly

    SECTION 3 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. COVER (UPPER T), FRONT PANEL ASS’Y 1 screw 1 screw (PTT2.6 × 6) (PTT2.6 × 6) 2 cover (upper T) 3 lever (FLT) 1 screw (PTT2.6 × 6) 1 screw (PTT2.6 ×...
  • Page 6 JACK BOARD Remove the jack board in the direction of the arrow. 1 ground point screw (PTT2.6 × 6) 2 jack board MAIN BOARD 1 main flexible board (CNJ12) 6 three screws (FP) 7 main board 2 Break the soldering of motor (M104) lead.
  • Page 7 ELEVATOR MOTOR ASS’Y (M104) 1 screw (PTT2 × 3) 2 bracket (EVM) 3 elevator motor ass’y (M104) ESCUTCHEON 3 two claws 2 Remove the claw in the direction of the arrow A . 4 Remove the ditch in the direction of the arrow B .
  • Page 8 CASE (UPPER) ASS’Y 3 Remove the edge in the direction of the arrow A . 1 three screws (PTT2 × 4) 1 two screws (PTT2 × 4) 4 Remove the case (upper) ass’y in the direction of the arrow B . 1 screw (PTT2 ×...
  • Page 9 RF BOARD 1 OP flexible board 3 two screws (CNJ11) (PS2 × 4) 3 two screws (PS2 × 4) 7 RF board 5 connector (CNP53) 2 Break the soldering 6 Break the soldering of lead. of motor (M102) lead. SLED MOTOR ASS’Y (M102), OPTICAL PICK-UP (KSS-521A/J2N) 1 two screws 2 sled motor ass’y (ESCUTCHEON)
  • Page 10 SW BOARD, SPINDLE MOTOR ASS’Y (M101) 8 two screws (P1.7 × 2.2) 3 spring (chucking) 6 retainer (disc) 1 screw (P2 × 2.2) 4 screw (P2 × 2.2) 5 bracket (CP) 9 Remove the spindle motor ass’y (M101) 2 SW board in the direction of the arrow.

  • Page 11: Mechanism Deck Assembly

    SECTION 4 MECHANISM DECK ASSEMBLY Note: Follow the assembly procedure in the numerical order given. OPTICAL PICK-UP COMPLETE ASS’Y 1 Move the lever (LOCK 3) in direction A , and return it a little in direction B from the position where the chuck plate is moved chuck plate down to the lower limit.
  • Page 12 OPERATION CHECK 1 Confirm that the slider moves in direction C to move down the chuck plate if the gear (LOAD CAM) is rotated in direction A or the chuck plate moves up and the slider moves in direction D if the gear is rotated in direction B .

  • Page 13: Mechanical Adjustments

    1 to 10 with the set placed vertically and horizontally respectively to confirm that the elevator shaft positions in a range between comb teeth A to B. CDX-737 comb tooth at address 6 comb tooth at address 6...

  • Page 14: Electrical Adjustments

    SECTION 6 ELECTRICAL ADJUSTMENTS Note: • TRACKING OFFSET CHECK 1. Perform adjustments as given. 2. Power supply voltage: DC14.4 V (more than 3A). – RF BOARD (Conductor Side) – oscilloscope • FOCUS BIAS CHECK CNJ12 – RF BOARD (Conductor Side) – –...
  • Page 15 • FOCUS GAIN ADJUSTMENT • When gain is lowered... (COARSE ADJUSTMENT) The set does not play because of no focus operation. This adjustment is to be performed when replacing the following • When gain is highered... parts. Operation noise is heard due to a scratch or a dust, then opera- •...

  • Page 16: Diagrams

    CDX-737 SECTION 7 DIAGRAMS 7-1. BLOCK DIAGRAM – SERVO Section – D.OUT DIGITAL DIGITAL SIGNAL PROCESSOR, FILTER CLV SERVO IC101 PCMD, BCK, PD1 I-V AMP LRCK, WDCK PCMD PCMD (Page 17) BCKO LRCK LRCK DETECTOR ASYMMETRY RFCK, GTOP, WFCK, DIGITAL PLL...

  • Page 17: Block Diagram - Main Section

    CDX-737 7-2. BLOCK DIAGRAM – MAIN Section – • SIGNAL PATH : CD PLAY DIGITAL FILTER, D/A CONVERTER, D-RAM CONTROLLER LOW-PASS FILTER IC401 IC601 D OUT DIGITAL CN901 (1/2) PCMD, BCK, AUDIO OUT LRCK, WDCK PCMD DATI (Page 16) DATA...

  • Page 18: Block Diagram - Bus Control/Power Supply Section

    MAGAZINE IN/OUT MAG.SW D311 DETECT REGULATOR MICON +5V Q303 CD.ON BU.CHK SERVO +5V, REGULATOR B.UP DAC +5V Q307 BUS INTERFACE (FOR SONY BUS) ELEVATOR MOTOR DRIVE IC302 REGULATOR IC301 CONTROL SWITCH Q306 DATA OUT1 ELV.R ELEVATOR M104 OUT2 MOTOR DRIVE ELV.F...

  • Page 19: Note For Printed Wiring Boards And Schematic Diagrams

    7-4. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS Note on Printed Wiring Board: Note on Schematic Diagram: • 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 •...

  • Page 20: Printed Wiring Boards - Rf/Sw Boards

    CDX-737 7-5. PRINTED WIRING BOARDS – RF/SW Boards – RF BOARD (COMPONENT SIDE) RF BOARD (CONDUCTOR SIDE) • Semiconductor Location Ref. No. Location IC11 IC51 CNJ12 IC52 IC51 RV14 M101 (SPINDLE) CNP53 (VC) MAIN (FE0) BOARD (RF) (Page 22) TP (GND)

  • Page 21: Schematic Diagram - Rf/Sw Boards

    CDX-737 7-6. SCHEMATIC DIAGRAM – RF/SW Boards – • • See page 27 for Waveforms. See page 29 for IC Block Diagrams. (Page 24) The components identified by mark 0 or dotted Les composants identifiés par une marque 0 sont line with mark 0 are critical for safety.

  • Page 22: Printed Wiring Boards - Main Board (Component Side)

    CDX-737 7-7. PRINTED WIRING BOARDS – MAIN Board (Component Side) – • Semiconductor MAIN BOARD (COMPONENT SIDE) Location (Component Side) C106 R314 R102 Ref. No. Location IC403 C107 R106 C102 R110 C103 D301 R108 R107 C104 R105 R103 D302 C115...

  • Page 23: Printed Wiring Board - Main Board (Conductor Side)

    CDX-737 7-8. PRINTED WIRING BOARD – MAIN Board (Conductor Side) – • Semiconductor MAIN BOARD (CONDUCTOR SIDE) Location (Conductor Side) Ref. No. Location Q307 E-11 Q309 G-11 C609 (CHASSIS) C601 X601 C604 SW202 MAGAZINE IN/OUT DETECT C610 C630 C317 C318...

  • Page 24: Schematic Diagram - Main Board (1/2)

    CDX-737 7-9. SCHEMATIC DIAGRAM – MAIN Board (1/2) – • • See page 27 for Waveforms. See page 30 for IC Block Diagrams. (Page...

  • Page 25: Schematic Diagram - Main Board (2/2)

    CDX-737 7-10. SCHEMATIC DIAGRAM – MAIN Board (2/2) – • • See page 28 for Waveforms. See page 31 for IC Block Diagrams. (Page 26)

  • Page 26: Printed Wiring Boards - Jack Board

    7-12. SCHEMATIC DIAGRAM – JACK Board – JACK BOARD (COMPONENT SIDE) C902 C901 CNJ901 FB901 JACK FLEXIBLE BOARD 1-676-340- FB902 MAIN (Page 25) BOARD (Page 22) FB903 1-674-307- (12) JACK BOARD (CONDUCTOR SIDE) AUDIO OUT CN901 CONTROL (FOR SONY BUS) IC901 1-674-307- (12)
  • Page 27 • Waveforms – RF Board – – MAIN Board (1/2) – 1 IC101 wj (MDP) (CD PLAY) 6 IC101 ys (RFCK) 1 IC11 ed (RF O) (CD PLAY) 500 mV/DIV, 500 ns/DIV 2.5 Vp-p 6.4 Vp-p 1.4 Vp-p 7.6 µ s 13.6 µ...
  • Page 28 – MAIN Board (2/2) – qh IC401 9 (BCKI) wa IC401 ql (LRCK) qa IC501 wl (EXTAL) 6.5 Vp-p 5.6 Vp-p 3.1 Vp-p 22.7 µ s 474 ns 100 ns qs IC501 uj (WRCK) qj IC401 qs (LRCI) ws IC601 qd (MCK) 5.8 Vp-p 5.8 Vp-p 6.3 Vp-p...

  • Page 29: Ic Block Diagrams

    • IC Block Diagrams – RF Board – IC11 CXA1992BR 33 32 31 30 PD 2 PD 1 I-V AMP I-V AMP RF SUMMING FOCUS OK COMPARATOR LASER POWER CONTROL IFB1 – IFB6 PEAK/BOTTOM MIRR HOLD COMPARATOR ↓ DEFECT PEAK/BOTTOM BIAS HOLD FOCUS BIAS...

  • Page 30: Main Board

    IC51 BA6297AFP 24 23 17 16 – – – T.S.D MUTE – – – 9 10 12 13 IC52 BA6287F OUT1 OUT2 DRIVER DRIVER VREF CONTROL LOGIC POWER SAVE – MAIN Board – IC101 CXD2530Q 80 79 78 77 76 75 74 73 72 71 70 69 68 67 66 65 64 63 62 61 60 59 58 57 56 55 54 53 52 51 LRCK...
  • Page 31 IC202 BR24C16FJ-E2 IC301 BA6287F OUT1 START STOP LOGIC SERIAL CONTROL H.V. PUMP/TIMING LOGIC OUT2 8 VCC LOAD COMP DEVICE DATA RECOVERY DRIVER DRIVER ADDRESS COMPARATOR LOAD INC DATA WORD PROM ADDR/COUNTER VREF CONTROL LOGIC Y DEC SERIAL MUX POWER SAVE /ACK LOGIC IC302 BA8272F-E2...
  • Page 32 IC402 MSM514400D-60TS-K WRITE DATA INPUT DATA OUTPUT CLOCK BUFFER BUFFER GENERATOR CLOCK GENERATOR 4M BIT COLUMN SENSE AMP MEMORY I/O GATE DECODER CELL BOARD CLOCK BIAS GENERATOR GENERATOR DECODER REFRESH MODE PRE- ADDRESS ADDRESS CONTROL DECODER BUFFER COUNTER IC601 TC9464FN-EL IC502 KM62256DLG-7LT 28 VCC 14 13...

  • Page 33: Ic Pin Function Description

    ESPXLT ESP latch pulse signal output to the CXD2522Q (IC401) “L” active System reset signal input from the SONY bus interface (IC302) and reset signal generator (IC304) “L”: reset For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”...
  • Page 34 Not used (open) C.OUT Track number count signal input from the CXA1992BR (IC11) BUS.ON Bus on/off control signal input from the SONY bus interface (IC302) “H”: bus on — Not used (open) MGLK Magazine eject operation completion detect switch (SW201) input “L”: magazine detected Motor drive signal (elevator up direction) output to the elevator motor drive (IC301) ELV.F...
  • Page 35 20 to 27 Two-way data bus with the S-RAM (IC502) System reset signal input from the system controller (IC201), SONY bus interface (IC302) and reset signal generator (IC304) “L”: reset For several hundreds msec. after the power supply rises, “L” is input, then it changes to “H”...

  • Page 36: Exploded Views

    SECTION 8 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 may have some difference from the original are seldom required for routine service.
  • Page 37 (2) MECHANISM DECK SECTION-1 (MG-250D-137) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-3375-497-1 CHASSIS (U) SUB ASSY 4-965-759-01 WASHER, POLYETHYLENE 3-024-161-01 SPRING (SUT) 3-011-997-01 SPRING (STOPPER. LOWER)
  • Page 38 (3) MECHANISM DECK SECTION-2 (MG-250D-137) M104 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-024-170-01 SPRING (SB), TENSION X-3378-136-1 CHASSIS (D.D) SUB ASSY * 102 3-024-172-01 BRACKET (EVM) M104 A-3301-123-A ELJ MOTOR ASSY (ELEVATOR)
  • Page 39 (4) MECHANISM DECK SECTION-3 (MG-250D-137) M103 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 151 3-024-150-01 RETAINER (CHM) 3-010-268-01 SPRING (DH), TENSION * 152 X-3378-080-1 BRACKET (CHM. D) ASSY * 161 A-3290-194-I MAIN ASSY, CHASSIS (EVY) 3-010-270-01 COVER (CHM) 3-010-254-01 SHAFT (ROTARY PREVENTION C) 3-321-813-01 WASHER, COTTER POLYETHYLENE...
  • Page 40 (5) MECHANISM DECK SECTION-4 (MG-250D-137) not supplied M101 not supplied 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. Replace only with part num- Ne les remplacer que par une pièce ber specified.

  • Page 41: Electrical Parts List

    SECTION 9 JACK MAIN ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark parts list may be different from the parts speci- are seldom required for routine service.
  • Page 42 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C642 1-163-001-11 CERAMIC CHIP 220PF R103 1-216-113-00 METAL CHIP 470K 1/10W R104 1-216-061-00 METAL CHIP 3.3K 1/10W < DIODE > R105 1-216-061-00 METAL CHIP 3.3K 1/10W D301 8-719-975-40 DIODE RB411D-T146 R106 1-216-073-00 METAL CHIP...
  • Page 43 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < VARIABLE RESISTOR > 1-163-038-00 CERAMIC CHIP 0.1uF 1-163-038-00 CERAMIC CHIP 0.1uF RV201 1-223-834-11 RES, ADJ, CARBON 47K 1-163-038-00 CERAMIC CHIP 0.1uF RV202 1-225-951-21 RES, VAR, SLIDE 10K (ELEVATOR HEIGHT SENSOR) 1-163-038-00 CERAMIC CHIP 0.1uF...
  • Page 44 CDX-737 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-073-00 METAL CHIP 1/10W ACCESSORIES & PACKING MATERIALS 1-216-093-11 RES-CHIP 1/10W ******************************** 1-216-081-00 METAL CHIP 1/10W 3-867-910-11 MANUAL, INSTRUCTION (ENGLISH, FRENCH, 1-216-093-11 RES-CHIP 1/10W SPANISH, CHINESE) (US, Canadian, E)

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