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SERVICE MANUAL
MICROFILM
CDX-3250
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
FM/MW/LW COMPACT DISC PLAYER
– 1 –
AEP Model
UK Model
CDX-4180
MG-363X-121
KSS-521A

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   Summary of Contents for Sony CDX-3250

  • Page 1

    CDX-3250 SERVICE MANUAL AEP Model UK Model Model Name Using Similar Mechanism CDX-4180 CD Drive Mechanism Type MG-363X-121 Optical Pick-up Name KSS-521A SPECIFICATIONS FM/MW/LW COMPACT DISC PLAYER MICROFILM – 1 –...

  • Page 2: Table Of Contents

    5-1. Chassis Section ..............40 THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. 5-2. Front Panel Section ............41 REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE 5-3. CD Mechanism Section (1) ..........42 PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

  • Page 3

    SECTION 1 GENERAL This section extracted from instruction manual. – 3 –...

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  • Page 9: 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) – 9 –...

  • Page 10: Sub Panel (1) Assy

    2-3. SUB PANEL (1) ASSY 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 11: Main Board

    2-5. MAIN BOARD 5 MAIN board 4 screws (ground point) 3 screw (ground point) 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 – 11 –...

  • Page 12: 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 DISC IN SW board...

  • Page 13: 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 14: 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 15: Electrical Adjustments

    SECTION 3 ELECTRICAL ADJUSTMENTS TEST MODE FM Auto Scan/Stop Level Adjustment Setting : This set have the test mode function. In the test mode, FM Auto D-BASS switch : OFF Scan/Stop Level and MW Auto Scan/Stop Level adjustments can SOURCE button : FMI be performed easier than it in ordinary procedure.

  • Page 16: Connections

    FM Stereo Separation Adjustment MW Auto Scan/Stop Level Adjustment Setting : Make this adjustment after “FM Auto Scan/Stop Level Adjustment” D-BASS switch : OFF Setting : SOURCE button : FMI D-BASS switch : OFF SOURCE n MODE button : MW FM RF signal 30 Ω...

  • Page 17

    Adjustment Location : tuner unit (TU1) –set upper view– MW AUTO SCAN/ STOP LEVEL ADJ FM AUTO SCAN/ STOP LEVEL ADJ FM STEREO SEPARATION ADJ – 17 –...

  • 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-526-3B9 (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

    Pin No. Pin Name Pin Description EZ-SEL SHIFT + input SENS Information input from servo IC. Focus OK input LD-ON Laser diode control — Not used. (Connect to GND.) ST/MONO Used for both STEREO indicator display input and force MONO output. (FM) LCD-CKO LCD driver serial clock output LCD-SO...

  • Page 21: Circuit Boards Location

    4-2. CIRCUIT BOARDS LOCATION DISC IN SW board SUB board tuner assy (TU01) LIMIT SW board DISPLAY board MAIN board LOAD SW board SERVO board – 21 –...

  • Page 22

    • Waveforms – CD MECHANISM SECTION – (MODE:PLAY) – MAIN SECTION (2/2) – – MAIN SECTION (1/2) – 5Vp-p 5.2Vp-p Approx. 620mVp-p 44.1kHz 4.5MHz &§ (LRCK) (XOUT) (FEO) IC701 IC801 5Vp-p 1.2Vp-p 2.11MHz #¡ (BCK) (RFO) IC701 3.4Vp-p (ROUT) IC701 Approx.

  • Page 23: Printed Wiring Boards -cd Mechanism Section

    CDX-3250 4-3. PRINTED WIRING BOARDS — CD MECHANISM SECTION — (Page 32) • 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 24

    CDX-3250 4-4. SCHEMATIC DIAGRAM — CD MECHANISM SECTION — • Refer to page 22 for Waveforms and Note. • Refer to page 37 for IC Block Diagrams. (1/2) (Page 33) – 25 – – 26 –...

  • Page 25: Printed Wiring Board -display Section

    CDX-3250 4-5. PRINTED WIRING BOARD — DISPLAY SECTION — (Page 31) • Semiconductor Location Ref. No. Location Ref. No. Location (D851) B-10 D869 (D852) B-11 D870 Note: (D853) B-10 D871 C-12 • : Through hole. ® (D854) B-10 D872 C-11 •...

  • Page 26: Schematic Diagram -display Section

    CDX-3250 4-6. SCHEMATIC DIAGRAM — DISPLAY SECTION — GREEN AMBER D561-D578 SML-010YT-T86 (AMBER) SML-010PT-T86 (GREEN) CNP552 (Page 36) Note: • All capacitors are in µF unless otherwise noted. pF: µµF • C : panel designation. 50 WV or less are not indicated except for electrolytics •...

  • Page 27: Printed Wiring Board -main Section

    CDX-3250 4-7. PRINTED WIRING BOARD — MAIN SECTION — • Semiconductor Location Ref. No. Location D401 D402 D507 D601 G-12 D602 G-13 D603 H-11 D801 D802 D804 D805 D806 D808 D810 D811 D812 D901 D902 D903 D905 D906 D907 D908...

  • Page 28: Schematic Diagram -main Section (1/2)

    CDX-3250 4-8. SCHEMATIC DIAGRAM — MAIN SECTION (1/2) — • Refer to page 39 for IC Block Diagrams. (Page 26) Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics TUNER UNIT and tantalums.

  • Page 29

    CDX-3250 4-9. SCHEMATIC DIAGRAM — MAIN SECTION (2/2) — • Refer to page 34 for Note. • Refer to page 39 for IC Block Diagrams. ELECTRICAL VOLUME FRONT L-CH – FRONT L-CH + REAR L-CH – REAR L-CH + REAR R-CH –...

  • Page 30: 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 31

    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 32

    IC401 LC75374E LFIN – LFOUT – – – – LSELO LROUT – – VREF CONTROL – SHIFT – DECODER LATCH REGISTER RROUT RSELO – – – – RFOUT – RFIN 6 7 8 9 10 IC402 TDA7385 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 –...

  • Page 33: Exploded Views

    SECTION 5 EXPLODED VIEWS NOTE: The components identified by • The mechanical parts with no reference number in • -XX, -X mean standardized parts, so they may have mark ! or dotted line with mark the exploded views are not supplied. some difference from the original one.

  • Page 34: Front Panel Section

    5-2. FRONT PANEL SECTION not supplied (DISPLAY board) LCD851 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-030-999-01 BUTTON (RELEASE) * 61 3-030-975-01 HOLDER, LCD 3-030-854-01 LEVER (SEEK/AMS) * 62 3-030-978-01 PLATE (LCD), GROUND 3-935-119-01 SPRING (RELEASE) 3-019-558-11 SHEET (D) (LCD) 3-030-998-01 BUTTON (MODE SOUND) * 64...

  • Page 35: 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 SW 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 36: 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 3-014-727-01 WHEEL (LW), WORM 3-931-897-01 DAMPER (T) 3-931-879-02 LEVER (D) 3-931-881-01 LEVER (LOCK) * 154 3-913-404-11 RETAINER (DISC) 3-931-882-02 GEAR (MDL) 3-931-894-01 BRACKET (CP) 3-007-537-11 WHEEL (U), WORM 3-032-484-01 SPRING (KR1), TENSION...

  • Page 37: Cd Mechanism Section (3)

    5-5. CD MECHANISM SECTION (3) (MG-363X-121) M901 M902 The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 201...

  • Page 38: Electrical Parts List

    SECTION 6 DISCIN SW 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 diagrams or the components used on the set.

  • Page 39

    DISPLAY LIMIT SW LOAD SW MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R557 1-216-218-00 RES,CHIP 6.8K 1/8W S554 1-572-704-31 SWITCH, KEY BOARD (SOUND) R558 1-216-073-00 METAL CHIP 1/10W S555 1-572-704-31 SWITCH, KEY BOARD (MODE) R559 1-216-226-00 RES,CHIP 1/8W...

  • Page 40

    MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C118 1-124-233-11 ELECT 10uF C804 1-163-234-11 CERAMIC CHIP 20PF C201 1-163-007-11 CERAMIC CHIP 680PF C202 1-163-809-11 CERAMIC CHIP 0.047uF C805 1-163-234-11 CERAMIC CHIP 20PF C203 1-164-346-11 CERAMIC CHIP C807 1-163-233-11 CERAMIC CHIP 18PF...

  • Page 41

    MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D914 8-719-200-82 DIODE 11ES2 Q402 8-729-027-31 TRANSISTOR DTA124EKA-T146 D918 8-719-200-82 DIODE 11ES2 Q601 8-729-030-51 TRANSISTOR 2SA1515S-R-TP D921 8-719-109-97 DIODE RD6.8ES-B2 Q602 8-729-030-51 TRANSISTOR 2SA1515S-R-TP Q605 8-729-620-06 TRANSISTOR 2SC3052-EF <...

  • Page 42

    MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R609 1-216-073-00 METAL CHIP 1/10W R845 1-249-429-11 CARBON 1/4W R852 1-216-049-11 RES,CHIP 1/10W R610 1-249-421-11 CARBON 2.2K 1/4W F R901 1-216-182-00 RES,CHIP 1/8W R611 1-216-049-11 METAL CHIP 1/10W R902 1-216-182-00 RES,CHIP...

  • Page 43

    SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-164-004-11 CERAMIC CHIP 0.1uF JR23 1-216-296-00 SHORT 1-163-037-11 CERAMIC CHIP 0.022uF JR24 1-216-296-00 SHORT 1-107-823-11 CERAMIC CHIP 0.47uF JR25 1-216-296-00 SHORT 1-163-809-11 CERAMIC CHIP 0.047uF JR26 1-216-296-00 SHORT 1-163-251-11 CERAMIC CHIP 100PF JR27...

  • Page 44

    SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-216-097-00 RES,CHIP 100K 1/10W ACCESSORIES & PACKING MATERIALS 1-216-097-00 RES,CHIP 100K 1/10W ******************************* 1-216-081-00 METAL CHIP 1/10W 3-865-880-11 MANUAL, INSTRUCTION 1-216-109-00 METAL CHIP 330K 1/10W (ENGLISH,SPANISH,PORTUGUESE,SWEDISH) (AEP,UK) 1-216-105-00 RES,CHIP 220K 1/10W...

  • Page 45

    CDX-3250 Sony Corporation 99B097542-1 9-926-407-11 Personal & Mobile Communication Company Printed in Hungary © 1999. 2 – 52 – Published by Quality Assurance Dept.

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