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Sony CDP-CX250 Service Manual
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Sony CDP-CX250 Service Manual

Sony CDP-CX250 Service Manual

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SERVICE MANUAL
MICROFILM
CDP-CX250
Model Name Using Similar Mechanism
CD Mechanism Type
Base Unit Type
Optical Pick-up Type
SPECIFICATIONS
,Canada
Europe and Singapore
E
US Model
Canadian Model
AEP Model
Australian Model
NEW
CDM-40
KSM-213BKN/M-N
KSS-213B/S-N
220V-230V AC, 50Hz
110V-120V or 230-240V AC,
adjustable, 50/60 Hz
COMPACT DISC PLAYER
E Model

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Summary of Contents for Sony CDP-CX250

  • Page 1 CDP-CX250 SERVICE MANUAL US Model Canadian Model AEP Model E Model Australian Model Model Name Using Similar Mechanism CD Mechanism Type CDM-40 Base Unit Type KSM-213BKN/M-N Optical Pick-up Type KSS-213B/S-N SPECIFICATIONS ,Canada Europe and Singapore 220V-230V AC, 50Hz 110V-120V or 230-240V AC,...

  • Page 2: Table Of Contents

    MODEL IDENTIFICATION TABLE OF CONTENTS — BACK PANEL — 1. SERVICING NOTE ............3 2. GENERAL ..............3. DISASSEMBLY 3-1. Front Panel Assembly ............12 4-982-813- 3-2. Back Panel Assembly ............12 3-3. Table Assembly ..............13 3-4. Mechanism Deck Assembly ..........13 US Model : 0π...

  • Page 3: Servicing Note

    REPLACE THESE COMPONENTS WITH SONY PARTS FONCTIONNEMENT. NE REMPLACER CES COMPOSANTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

  • Page 4: General

    SECTION 2 GENERAL LOCATION OF PARTS AND CONTROLS Front Panel 1 23 4 567 !¡ !™ !£ !¢!∞ @¡ !• !¶ @™ @º !ª !§ 1 POWER button !™ JOG dial 2 CONTINUE button !£ ENTER button 3 Display window !¢...
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  • Page 12: Disassembly

    SECTION 3 DISASSEMBLY Note : Follow the disassembly procedure in the numerical order given. 3-1. FRONT PANEL ASSEMBLY 1 Two screws 6 Remove (BVTP 3x8) the claw 7 Front panel assembly 5 Remove the claw 3 Two screws (BVTT3x6) 4 Flat type wire (CN601) 2 Three screws (BVTT3x6) 3-2.

  • Page 13: Mechanism Deck Assembly

    3-3. TABLE ASSEMBLY 4 Three screws (BVTT3x6) 1 Stop ring (E type) 5 Three holder assemblies 6 Table assembly 7 Washer 2 Two screws (BVTT3x6) 3 Two holder assemblies 3-4. MECHANISM DECK 6 Flat type wire !º Mechanism deck (23core) (CN303) Main board 1 Four screws (BVTT3x6) Jack board...
  • Page 14 3-5. BASE UNIT 1 Screw (BVTT3x6) 2 Fulcrum plate (BU UPPER) assy 3 Base unit — 14 —...

  • Page 15: Test Mode

    SECTION 4 TEST MODE 4-1. Display Check Mode 4-3. Key and Display Check Mode With the power turned off (standby state), press the POWER button To set this mode, connect the test point (TP302: AFADJ) on the MAIN while pressing the P (pause) button. board to Ground, and connect the power supply plug to the outlet.

  • Page 16: Adjustments

    SECTION 5 ADJUSTMENTS 5-1. MECHANICAL ADJUSTMENT Perform the following steps before carrying out adjustments. 1. Turn ON the power of the unit, set disc to disc table No. 92, and perform chucking. 2. Turn OFF the power. 3. Remove the case. 4.
  • Page 17 SENSOR ALIGNMENT If the disc table swings to the left and right just before the disc is chucked, perform the following adjustment. LEVER (stopper) assembly (1) Rotate the cam and adjust to the position Bracket (sensor) shown in the figure. Table assembly (2) Check that the lever (stopper) assem- bly secures the disc table as shown in...
  • Page 18 GUIDE (DISC T) ALIGNMENT Holder (guide T) Guide (disc T) Fixed screw (1)Rotate the cam and adjust to the position shown in the figure. Guide (disc T) (2)Check that the state is as shown in the figure. Disc Tapering screwdriver Guide (disc T) Disc Holder (guide T)
  • Page 19 HOLDER (DISC A) ALIGNMENT Holder (disc A) Thrust screw (1)Rotate the cam and adjust to the position shown in the figure. Disc 0–1 mm Holder (disc A) (2)Check that the state is as shown in the figure. Disc Holder (disc A) Thrust screw 1 2 3 1 2 3...
  • Page 20 PULLY AND DISC CENTER HOLE ALIGNMENT Base unit Bracket (BU adjustment) (1)Rotate the cam and adjust to the position shown in the figure. Magnet assembly (2)Check that the state is as shown in the figure. 0.5–2mm Disc Disc pulley Disc hole Base unit Note:The disc should not be fixed.
  • Page 21 MAGNET ASSY ALIGNMENT Adjustment screw Magnet assy (1) Rotate the cam and adjust to the posi- tion shown in the figure. Disc Magnet holder Magnet assy Adjustment screw 1 2 3 (3) Apply screw-lock to the 1 2 3 part after adjusting. Adjustment screw (2)Rotate the adjustment screw until A=B or between A:B=2:1...

  • Page 22: Electrical Block Checking

    5-2. ELECTRICAL BLOCK CHECKING Note: Note: A clear RF signal waveform means that the shape “◊” can be 1. CD Block is basically designed to operate without adjustment. clearly distinguished at the center of the waveform. Therefore, check each item in order given. 2.
  • Page 23 RF PLL Free-run Frequency Check Procedure : 1. Connect frequency counter to test point TP (PLCK) with lead wire. frequency counter BD (TEXT) board TP (PLCK) 2. Turn Power switch on. 3. Put the disc (YEDS-18) in to play the number five track. Confirm that reading on frequency counter is 4.3218MHz.

  • Page 24: Diagrams

    SECTION 6 DIAGRAMS 6-1. CIRCUIT BOARDS LOCATION LUMINOUS board MAIN board T SENS board ILLUMINATION board JACK board DISP board T. MOTOR board DOOR SW board RAY-CATCHER board JOG board BD (TEXT) board L.SW board L. MOTOR board — 24 —...

  • Page 25: Ic101 Digital Servo, Digital Signal Processor (Cxd2545Q)

    6-6. IC PIN FUNCTIONS • IC101 DIGITAL SERVO, DIGITAL SIGNAL PROCESSOR (CXD2545Q) Pin No. Pin Name Function SRON Sled drive output (Open) SRDR Sled drive output SFON Sled drive output (Open) TFDR Tracking drive output TRON Tracking drive output (Open) TRDR Tracking drive output TFON...
  • Page 26 Pin No. Pin Name Function – Digital power supply ASYE Asymmetry circuit ON/OFF (Connected to +5V) PSSL Audio data output mode selection input (Connected to Ground) WDCK 48-bit slot D/A interface. Word clock. (Open) LRCK 48-bit slot D/A interface. LR clock. DATA DA 16 output when PSSL=1.48-bit slot serial data when PSSL=0 BCLK...
  • Page 27 Pin No. Pin Name Function XRST System reset DIRC Used in 1-track jump mode (Connected to +5v) SCLK SENS serial data read-out clock DFSW Defect selection pin (Connected to Ground) ATSK Input pin for anti-shock (Connected to Ground) DATA Serial data input, supplied from CPU XLAT Latch input, supplied from CPU CLOK...

  • Page 28: Ic303 System Control (Cxp84332-Q27Q)

    • IC303 SYSTEM CONTROL (CXD84332-027Q) Pin No. Pin Name Function SRAM address SRAM address SRAM address SRAM address SRAM address SRAM address SRAM address SRAM address SRAM address SRAM address SRAM address SRAM address SRAM write enable LED1 PLAY LED control H: Lighting up LED2 PAUSE LED control...
  • Page 29 Pin No. Pin Name Function KEY2 Key input KEY1 Key input KEY0 Key input Latch for servo IC AFADJ ADJ Type switching and test mode input. BUSIN CONTROL-A1 input L: Active PRGLT Latch for digital filter IC Clock for servo IC and digital filter IC AMUTE Audio mute H: Mute ON...

  • Page 36: Exploded Views

    SECTION 7 EXPLODED VIEWS NOTE: The components identified by • Abbreviation • Items marked “*” are not stocked since they are mark ! or dotted line with mark CND : Canadian model seldom required for routine service. Some delay ! are critical for safety. : German model should be anticipated when ordering these items.

  • Page 37: Disc Table Section

    7-2. DISC TABLE SECTION not supplied supplied not supplied not supplied supplied supplied not supplied supplied M801 supplied supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 51 1-661-466-11 T. MOTOR BOARD * 67 4-982-804-01 COVER (DISC) X-4947-230-1 BRACKET (TABLE) ASSY 4-982-805-01 INDICATOR (INTERNAL) X-4947-607-1 GEAR (PULLEY) ASSY...

  • Page 38: Front Panel Section

    (EXCEPT US,CND) * 125 4-982-783-01 LEVER (WINDMILL) 4-933-134-01 SCREW (+PTPWH M2.6X6) 4-977-358-11 CUSHION (8X12.5) 4-982-785-01 SPRING (OPEN), COMPRESSION 4-963-404-21 EMBLEM (5-A), SONY 4-982-784-01 LEVER (LOCK) X-4947-219-1 PLATE (A) ASSY, FULCRUM * 129 A-4699-046-A JOG BOARD, COMPLETE 4-982-797-11 SPRING (A), TORSION...

  • Page 39: Mechanism Section-1 (Cdm-40)

    7-4. MECHANISM SECTION-1 (CDM-40) not supplied not supplied not supplied not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark X-4947-241-1 LEVER (C) ASSY 3-366-559-02 MAGNET (CHUCK) 4-982-882-01 SPRING (LIMITTER), TORSION 4-960-633-01 YOKE (MAGNET) 4-982-881-01 SPRING (HOLDER), TORSION X-4947-239-1 LIMITTER (A) ASSY 4-960-632-11 PULLEY (B) 4-982-853-01 LEVER (B)

  • Page 40: Mechanism Section-2 (Cdm-40)

    7-5. MECHANISM SECTION-2 (CDM-40) not supplied not supplied not supplied M802 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-976-465-01 GEAR (LOADING 1) 4-951-291-01 SCREW 4-976-466-01 GEAR (LOADING 2) X-4947-234-1 SLIDER (LOCK) ASSY 4-982-893-01 GEAR (CENTER 2) 4-982-857-01 BEARING (CAM) X-4947-607-1 GEAR (PULLEY) ASSY 4-982-860-01 CAM (A)

  • Page 41: Base Unit Section-1 (Ksm-213Bkn/M-N)

    7-6. BASE UNIT SECTION-1 (KSM-213 BKN/M-N) Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-356-601-11 SCREW, STEP 4-982-872-01 SPRING (F-2), TENSION X-4947-244-1 SLIDER (BU ADJUSTMENT) ASSY 4-982-871-01 SPRING (F-1), TENSION X-4947-243-1 HOLDER (BU) ASSY 4-982-858-01 DAMPER 4-982-859-01 HOLDER (DAMPER) 4-960-617-01 CAP (F) 4-982-878-01 SPRING (F), COMPRESSION...

  • Page 42: Base Unit Section-2 (Ksm-213Bkn/M-N)

    7-7. BASE UNIT SECTION-2 (KSM-213 BKN/M-N) not supplied not supplied not supplied M101 not supplied M102 The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. Les composants identifiés par une marque ! sont critiques pour la sécurité.

  • Page 43: Electrical Parts List

    SECTION 8 BD (TEXT) ELECTRICAL PARTS LIST Note: • Due to standardization, replacements in the parts list • SEMICONDUCTORS The components identified by may be different from the parts specified in the dia- In each case, u: µ , for example: mark ! or dotted line with mark grams or the components used on the set.
  • Page 44 BD (TEXT) DISP ILLUMINATION DOOR SW Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R161 1-216-308-00 METAL CHIP 1/10W R706 1-249-434-11 CARBON 1/4W R162 1-216-101-00 METAL CHIP 150K 1/10W R710 1-249-415-11 CARBON 1/4W F R711 1-249-417-11 CARBON 1/4W F <...
  • Page 45 JACK ILLUMINATION Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < DIODE > < RESISTOR > D802 8-719-059-65 DIODE HLMF-KL05 (INSIDE ILLUMINATION) R116 1-249-409-11 CARBON 1/4W F D803 8-719-059-65 DIODE HLMF-KL05 (INSIDE ILLUMINATION) R216 1-249-409-11 CARBON 1/4W F D804 8-719-059-65 DIODE HLMF-KL05 (INSIDE ILLUMINATION)
  • Page 46 L.MOTOR LUMINOUS L.SW MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R612 1-247-807-31 CARBON 1/4W C103 1-162-215-31 CERAMIC 47PF C104 1-162-215-31 CERAMIC 47PF < JOG SWITCH > C106 1-130-472-00 MYLAR 0.0012uF C107 1-106-359-00 MYLAR 4700PF 200V RE601 1-762-717-11 SWITCH, JOG (DISC/CHARACTER)
  • Page 47 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark CN301 1-770-728-11 CONNECTOR, BOARD TO BOARD 9P CN302 1-770-728-11 CONNECTOR, BOARD TO BOARD 9P < RESISTOR > * CN303 1-568-839-11 SOCKET, CONNECTOR 23P CN304 1-506-468-11 PIN, CONNECTOR 3P R101 1-249-436-11 CARBON 1/4W...
  • Page 48 MAIN RAY-CATCHER T.MOTOR T.SENS Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-661-469-11 RAY-CATCHER BOARD R325 1-249-424-11 CARBON 3.9K 1/4W F ***************** R326 1-247-739-11 CARBON 1/2W F 4-985-300-01 HOLDER (P-T) R327 1-249-411-11 CARBON 1/4W R329 1-249-441-11 CARBON 100K 1/4W R330...
  • Page 49 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark ************** MISCELLANEOUS HARDWARE LIST ************** ************** 1-773-183-11 WIRE (FLAT TYPE) (23 CORE) 7-685-646-79 SCREW +BVTP 3X8 TYPE2 N-S 1-777-345-11 WIRE (FLAT TYPE) (19 CORE) 7-685-871-01 SCREW +BVTT 3X6 (S) ! 12 1-569-007-11 ADAPTOR, CONVERSION 2P (E) 7-685-647-79 SCREW +BVTP 3X10 TYPE2 N-S...
  • Page 50 CDP-CX250 English 96G0984-1 Printed in Japan Sony Corporation © 1996.7 9-960-722-11 Home A&V Products Company Published by Quality Engineering Dept. (Shibaura) — 68 —...

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