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Sony CDX-4250 Service Manual

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SERVICE MANUAL
SPECIFICATIONS
MICROFILM
CDX-4250/4500
Photo: CDX-4250
– 1 –
Canadian Model
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
FM/AM COMPACT DISC PLAYER
US Model
CDX-4250
E Model
CDX-4500
CDX-4180
MG-363X-121
KSS-521A

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Table of Contents
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  Summary of Contents for Sony CDX-4250

  • Page 1 CDX-4250/4500 SERVICE MANUAL US Model Canadian Model CDX-4250 E Model CDX-4500 Photo: CDX-4250 SPECIFICATIONS Model Name Using Similar Mechanism CDX-4180 CD Drive Mechanism Type MG-363X-121 Optical Pick-up Name KSS-521A FM/AM COMPACT DISC PLAYER MICROFILM – 1 –...
  • Page 2: Service Note

    LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE ! SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.
  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1. GENERAL Location of Controls ..............4 Getting Started ................4 CD Player .................. 5 Radio ..................5 Other Functions ................. 6 Additional Information .............. 7 Connections ................8 2. DISASSEMBLY 2-1. Cover ASSY ................ 10 2-2. Front Panel ASSY ............... 10 2-3.
  • Page 4 SECTION 1 GENERAL This section extracted from US, Canadian model’s instruction manual. – 4 –...
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  • Page 10: Disassembly

    SECTION 2 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 2-1. COVER ASSY 1 claw 4 cover assy 3 claws 2 claw 2-2. FRONT PANEL ASSY 2 front panel assy 1 button (release) – 10 –...
  • Page 11: Display Board

    2-3. DISPLAY BOARD 4 claw 5 sub panel (1) assy 1 PTT 2.6x6 3 claw 2 PTT 2.6x6 2-4. CD MECHANISM BLOCK 7 PTT 2.6x6 2 PTT 2.6x6 8 bracket (M/D) 3 PTT 2.6x6 5 CD mechanism block 6 PTT 2.6x6 4 CNP701 1 PTT 2.6x6 –...
  • Page 12: Main Board

    2-5. MAIN BOARD 5 MAIN board 4 screws (+BTT) 3 screw (+BTT) 2 PTT 2.6x8 1 PTT 2.6x8 2-6. HEAT SINK 4 heat sink 1 PTT 2.6x8 2 PTT 2.6x10 3 PTT 2.6x8 – 12 –...
  • Page 13: Chassis (T) Sub Assy

    2-7. CHASSIS (T) SUB ASSY 3 P 2x3 2 P 2x3 5 chassis (T) sub assy 1 Unsolder the lead wires. 4 P 2x3 white black 2-8. LEVER ASSY 5 guide (disc) 6 lever (R) assy 3 tension spring (LR) 7 lever (L) assy 1 PS 2x4 2 DISCIN board...
  • Page 14: Servo Board

    2-9. SERVO BOARD 6 PS 2x4 5 PS 2x4 2 CN2 1 CN3 3 P 2x3 7 SERVO board 4 loading motor assy 2-10. ROLLER ASSY • When installing, take note of the positions arm (roller) and washers. (Fig. 1) washer washers washer...
  • Page 15: Chassis (Op) (O/S) Assy

    2-11. CHASSIS (OP) (O/S) ASSY 7 chassis (OP) (O/S) assy 8 compression spring (FL) 1 tension spring (angle) 9 compression spring (FL) 2 tension spring (KR1) 5 Fit lever (D) in the direction of the arrow. 6 Turn loading ring in the direction of the arrow.
  • Page 16: Electrical Adjustments

    SECTION 3 ELECTRICAL ADJUSTMENTS TUNER SECTION 0 dB = 1 µV FM SENS/IF Adjustment Setting: SOURCE button : FMI Cautions during repair D-BASS switch : OFF When the tuner unit is defective, replace it by a new one because Frequency Select switch (E model) : FM 200K its internal block is difficult to repair.
  • Page 17 AM Auto Scan/Stop Level Adjustment Setting: digital voltmeter SOURCE n MODE button : AM D-BASS switch : OFF Frequency Select switch (E model) : AM 10K S-METER OUT – AM RF signal level dummy antenna generator meter antenna terminal 30 Ω 15 pF 4 Ω...
  • Page 18: Cd Section

    Focus Gain Adjustment (Coarse adjustment) CD SECTION This adjustment is not required unless the following parts are replaced: • Optical pick-up Note: • 1. CD Block basically constructed to operate without adjustment. Therefore, check each item in order given. Procedure: 2.
  • Page 19: Diagrams

    SECTION 4 DIAGRAMS 4-1. IC PIN DESCRIPTION • IC801 µPD17705GC-534-3B9 (SYSTEM CONTROL) Pin No. Pin Name Pin Description SIRCS SIRCS input (A/D) IN-SW CD mechanism position detection D-SW CD mechanism position detection SELF-SW CD mechanism position detection L-SW LIMIT switch LM-EJ Loading motor control (Eject direction) LM-LOD...
  • Page 20: Connections

    Pin No. Pin Name Pin Description ILL-ON Illumination output C.ALARM Caution alarm select input (Used/Not used) Not used (Connect to ground) — Fixed at “H” in this set. LCD-CE LCD drive chip select output EZ-SEL SHIFT + input SENS Information input from servo IC. Focus OK input LD-ON Laser diode control...
  • Page 21: Circuit Boards Location

    4-2. CIRCUIT BOARDS LOCATION • Waveforms (MODE:PLAY) DISCIN board SUB board Approx. 620mVp-p tuner assy (FEO) (TU01) LIMIT board 1.2Vp-p #¡ (RFO) Approx. 200mVp-p $™ (TEO) 2.6Vp-p DISPLAY board MAIN board 7.6µsec (MDP) LOAD board SERVO board 5.8Vp-p 22.7µsec @º (LRCK) 5.7Vp-p 474nsec...
  • Page 22: Printed Wiring Boards -Cd Mechanism Section

    CDX-4250/4500 4-3. PRINTED WIRING BOARDS — CD MECHANISM SECTION — • Semiconductor Location Ref. No. Location Note: • X : parts extracted from the component side. • Y : parts extracted from the conductor side. • b : Pattern from the side which enables seeing.
  • Page 23: Schematic Diagram -Cd Mechanism Section

    CDX-4250/4500 4-4. SCHEMATIC DIAGRAM — CD MECHANISM SECTION — • Refer to page 22 for Waveforms and Note and page 37 for IC Block Diagrams. (Page – 25 – – 26 –...
  • Page 24: Printed Wiring Board -Display Section

    CDX-4250/4500 4-5. PRINTED WIRING BOARD — DISPLAY SECTION — Note: • Semiconductor Location • : Through hole. ® Ref. No. Location Ref. No. Location Ref. No. Location • b : Pattern from the side which enables seeing. (D551) B-10 D566 D574 (The other layer’s patterns are not indicated.)
  • Page 25: Schematic Diagram -Display Section

    CDX-4250/4500 4-6. SCHEMATIC DIAGRAM — DISPLAY SECTION — (Page 36) Note: • C : panel designation. • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics • Voltage is dc with respect to ground under no-signal and tantalums.
  • Page 26: Printed Wiring Board -Main Section

    CDX-4250/4500 4-7. PRINTED WIRING BOARD — MAIN SECTION — • Semiconductor Location Ref. No. Location Ref. No. Location D401 IC801 D402 D604 Q101 D701 Q102 D801 Q201 D802 Q202 D803 Q401 D804 Q402 D805 Q601 D807 Q605 D808 Q606 D809...
  • Page 27: Schematic Diagram -Main Section (1/2)

    CDX-4250/4500 4-8. SCHEMATIC DIAGRAM — MAIN SECTION (1/2) — (Page 26) Note: • 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.
  • Page 28: Schematic Diagram -Main Section (2/2)

    CDX-4250/4500 4-8. SCHEMATIC DIAGRAM — MAIN SECTION (2/2) — • Refer to page 39 for IC Block Diagrams. CDX-4250 (Page 29) – 35 – – 36 –...
  • Page 29: Ic Block Diagrams

    • IC Block Diagrams IC1 CXD2507AQ SERVO AUTO SEQUENCER DATA XRST SENS SUB CODE MUTE PROCESSOR INTERFACE SQCK DIGITAL LOCK SQSO TEST EXCK SBSO FILO SCOR DIGITAL FILI DEMODULATOR WFCK EMPH AVSS CLTV ASYMMETRY AVDD CORRECTOR DIGITAL DOUT INTERFACE BIAS ERROR ASYI FSTT...
  • Page 30 IC2 CXA1782BQ 27 26 25 LEVEL S MIRR SENS RF IV AMP1 DFCT C.OUT XRST RF IV AMP2 FE BIAS IIL DATA REGISTER INPUT SHIFT REGISTER DATA ADDRESS DECODER OUTPUT DECODER TOG1-3 FS1-4 TG1-2 TM1-7 PS1-4 F IV AMP BAL1-3 FZC COMP E IV AMP TE AMP...
  • Page 31 IC401 LC75374E LFIN – LFOUT – – – – LSELO LROUT – – VREF CONTROL – SHIFT – DECODER LATCH REGISTER RROUT RSELO – – – – RFOUT – RFIN 6 7 8 9 10 IC402 TDA7384 DRIVER DRIVER DRIVER DRIVER 1 2 3 4 5 7 8 9...
  • Page 32: Exploded Views

    1-769-786-81 CORD (WITH CONNECTOR) (POWER) 3-922-535-11 SCREW (+BTT) * 12 3-024-285-01 CUSHION (RUBBER) * 13 3-024-016-11 PAPER (N), SHIELD A-3294-551-A MAIN BOARD, COMPLETE (CDX-4250) F901 1-532-877-11 FUSE (BLADE TYPE) (AUTO FUSE) 10A A-3294-631-A MAIN BOARD, COMPLETE (CDX-4500) 3-030-849-01 HEAT SINK (T) TU01...
  • Page 33: Front Panel Section

    * 64 3-019-561-01 SHEET, LCD COLOR 3-019-550-01 BUTTON (MODE/SOUND) 3-030-847-01 PANEL, FRONT BACK 3-019-552-01 BUTTON (1-6) X-3376-778-1 PANEL (S) ASSY, FRONT (CDX-4250) 3-030-873-11 BUTTON (CD EJECT) X-3377-100-1 PANEL (S) ASSY, FRONT (CDX-4500) 3-025-315-02 BUTTON (SOURCE) * 67 3-023-946-01 SHEET (H), BACK...
  • Page 34: Cd Mechanism Section (1)

    5-3. CD MECHANISM SECTION (1) (MG-363X-121) M903 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 101 1-659-836-11 DISCIN BOARD 3-931-902-04 ARM (ROLLER) * 102 A-3291-816-B CHASSIS (T) SUB ASSY 3-931-909-01 SPRING (LR), TENSION 3-936-756-01 ROLLER (D) X-3371-501-1 LEVER (L) ASSY 3-321-393-01 WASHER, STOPPER 3-338-737-01 SCREW (2X3), + PS...
  • Page 35: Cd Mechanism Section (2)

    5-4. CD MECHANISM SECTION (2) (MG-363X-121) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-931-893-01 ARM, CHUCKING * 159 A-3277-802-C CHASSIS (M) COMPLETE ASSY 3-931-897-01 DAMPER (T) 3-014-727-01 WHEEL (LW), WORM 3-931-879-02 LEVER (D) * 154 3-913-404-11 RETAINER (DISC) 3-931-881-01 LEVER (LOCK) 3-931-894-01 BRACKET (CP)
  • Page 36: Cd Mechanism Section (3)

    5-5. CD MECHANISM SECTION (3) (MG-363X-121) M901 M902 Les composants identifiés par une The components identified by marque ! sont critiques pour la mark ! or dotted line with mark ! are critical for safety. sécurité. Replace only with part number Ne les remplacer que par une specified.
  • Page 37: Electrical Parts List

    SECTION 6 DISCIN DISPLAY ELECTRICAL PARTS LIST Note: • SEMICONDUCTORS • Due to standardization, replacements in the parts list The components identified by In each case, u: µ , for example: may be different from the parts specified in the mark ! or dotted line with mark uA...: µ...
  • Page 38 C409 1-163-109-00 CERAMIC CHIP 47PF C410 1-126-786-11 ELECT 47uF (CDX-4500) ************************************************************** C411 1-124-465-00 ELECT 0.47uF A-3294-551-A MAIN BOARD, COMPLETE (CDX-4250) C412 1-164-346-11 CERAMIC CHIP C413 1-124-589-11 ELECT 47uF ********************* A-3294-631-A MAIN BOARD, COMPLETE (CDX-4500) C414 1-164-346-11 CERAMIC CHIP (CDX-4500) *********************...
  • Page 39 1-163-022-00 CERAMIC CHIP 0.012uF D401 8-719-109-71 DIODE RD3.9ES-B1 (CDX-4500) D402 8-719-991-33 DIODE 1SS133T-77 C614 1-163-037-11 CERAMIC CHIP 0.022uF D604 8-719-991-33 DIODE 1SS133T-77 (CDX-4250) D701 8-719-991-33 DIODE 1SS133T-77 C615 1-163-022-00 CERAMIC CHIP 0.012uF D801 8-719-109-93 DIODE RD6.2ESB2 (CDX-4500) C615 1-163-037-11 CERAMIC CHIP 0.022uF D802 8-719-109-93 DIODE RD6.2ESB2...
  • Page 40 Description Remark Ref. No. Part No. Description Remark JR60 1-216-295-00 SHORT R203 1-216-065-00 RES,CHIP 4.7K 1/10W JR86 1-216-295-00 SHORT 0 (CDX-4250) R204 1-216-065-00 RES,CHIP 4.7K 1/10W JR90 1-216-295-00 SHORT R205 1-216-049-11 RES,CHIP 1/10W R206 1-216-049-11 RES,CHIP 1/10W < COIL >...
  • Page 41 MAIN SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R819 1-216-061-00 METAL CHIP 3.3K 1/10W X801 1-760-223-11 VIBRATOR, CRYSTAL (4.5MHz) R820 1-216-057-00 METAL CHIP 2.2K 1/10W ************************************************************** R821 1-249-417-11 CARBON 1/4W F R822 1-249-417-11 CARBON 1/4W F A-3309-227-A SERVO BOARD, COMPLETE R823...
  • Page 42 SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < JUMPER RESISTOR > < RESISTOR > 1-216-296-00 SHORT 1-216-073-00 METAL CHIP 1/10W 1-216-296-00 SHORT 1-216-097-00 RES,CHIP 100K 1/10W 1-216-296-00 SHORT 1-216-121-00 RES,CHIP 1/10W 1-216-296-00 SHORT 1-216-061-00 METAL CHIP 3.3K 1/10W 1-216-296-00 SHORT...
  • Page 43 1-659-834-11 SUB BOARD PARTSFOR INSTALLATION AND CONNECTIONS ********* ************************************** < CONNECTOR > 3-014-370-31 FRAME, FITTING 3-916-012-01 BRACKET (ND), FITTING ASSIST (CDX-4250) 1-770-347-21 CONNECTOR, FPC 6P X-3366-405-1 SCREW ASSY (EXP), FITTING (CDX-4500) X-3368-725-1 SCREW ASSY, FITTING (CDX-4250) 3-934-325-01 SCREW (+K 5X8 TP) **************************************************************...
  • Page 44 CDX-4250/4500 Sony Corporation 98L090238-1 9-926-098-11 Personal & Mobile Communication Company Printed in Japan © 1998. 12 – 52 – Published by Quality Assurance Dept.

This manual is also suitable for:

Cdx-4500