Sony CDX-2500R Service Manual
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Sony CDX-2500R Service Manual

Aep model uk model fm/mw/lw compact disc player
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SERVICE MANUAL
CD player section
System
Compact disc digital audio
system
Signal-to-noise ratio
80 dB
Frequency response
10 – 20,000 Hz
Wow and flutter
Below measurable limit
Tuner section
FM
Tuning range
87.5 – 108.0 MHz
Aerial terminal
External aerial connector
Intermediate frequency 10.7 MHz
Usable sensitivity
12 dBf
Selectivity
75 dB at 400 kHz
Signal-to-noise ratio
65 dB (stereo),
68 dB (mono)
Harmonic distortion at 1 kHz
0.8% (stereo),
0.6% (mono)
Separation
35 dB at 1 kHz
Frequency response
30 – 15,000 Hz
MW/LW
Tuning range
MW: 531 – 1,602 kHz
LW: 153 – 281 kHz
Aerial terminal
External aerial connector
Intermediate frequency 10.7 MHz / 450 kHz
Sensitivity
MW: 30 µV
LW: 50 µV
MICROFILM
CDX-2500R
Model Name Using Similar Mechanism
CD Drive Mechanism Type
Optical Pick-up Name
SPECIFICATIONS
Power amplifier section
Outputs
Speaker impedance
Maximum power output 45 W × 4 (at 4 ohms)
General
Outputs
Tone controls
Power requirements
Dimensions
Mounting dimension
Mass
Supplied accessories
Design and specifications are subject to change without
notice.
FM/MW/LW COMPACT DISC PLAYER
AEP Model
UK Model
CDX-4270R
MG-363X-121
KSS-521A
Speaker outputs
(sure seal connectors)
4 – 8 ohms
Power aerial relay control
lead
Telephone ATT control
lead
Bass ±8 dB at 100 Hz
Treble ±8 dB at 10 kHz
12 V DC car battery
(negative ground)
Approx. 178 × 50 × 185 mm
(w/h/d)
Approx. 182 × 53 × 162 mm
(w/h/d)
Approx. 1.2 kg
Parts for installation and
connections (1 set)
Front panel case (1)
1

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Summary of Contents for Sony CDX-2500R

  • Page 1 CDX-2500R SERVICE MANUAL AEP Model UK Model Model Name Using Similar Mechanism CDX-4270R CD Drive Mechanism Type MG-363X-121 Optical Pick-up Name KSS-521A SPECIFICATIONS CD player section Power amplifier section System Compact disc digital audio Outputs Speaker outputs system (sure seal connectors)
  • Page 2 COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY.

  • Page 3: Table Of Contents

    TABLE OF CONTENTS 1. GENERAL Location of controls ..............4 Getting Started ................. 4 Setting the clock ..............4 CD Player ................4 Radio ..................5 RDS ..................5 Other Functions ............... 6 Connections ................8 2. DISASSEMBLY 2-1. Cover ................. 10 2-2.

  • Page 4: General

    SECTION 1 GENERAL This section is extracted from instruction manual.

  • Page 10: Cover

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

  • Page 11: Sub Panel (1) Assy

    2-3. SUB PANEL (1) ASSY 5 claw 6 sub panel (1) assy 1 PTT 2.6x6 4 claw 2 PTT 2.6x6 3 PTT 2.6x6 2-4. CD MECHANISM BLOCK 2 PTT 2.6x6 7 PTT 2.6x6 8 bracket (M/D) 3 PTT 2.6x6 5 CD mechanism block 6 PTT 2.6x6 4 CNP700 1 PTT 2.6x6...

  • Page 12: Main Board

    2-5. MAIN BOARD 6 MAIN board 4 ground point screws (PTT 2.6x6) 5 ground point screw (PTT 2.6x6) 3 PTT 2.6x8 2 PTT 2.6x8 1 PTT 2.6x8 2-6. HEAT SINK 4 heat sink 3 PTT 2.6x8 2 PTT 2.6x12 1 PTT 2.6x8...

  • Page 13: Chassis (T) Sub Assy

    2-7. CHASSIS (T) SUB ASSY 4 P 2x3 3 P 2x3 5 chassis (T) sub assy 1 Unsolder the lead wires. 2 P 2x3 gray 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 14: Servo Board

    2-9. SERVO BOARD 8 PS 2x4 7 PS 2x4 2 CN2 3 Removal the solders. 1 CN3 5 P 2x3 9 SERVO board 4 Removal the solders. 6 loading motor assy 2-10. ROLLER ASSY • When installing, take note of the positions arm (roller) and washers.

  • 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 (KF1) 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 Auto Scan/Stop Level Adjustment Setting : D-BASS switch : OFF Cautions during repair SOURCE button : FM When the tuner unit is defective, replace it by a new one because its internal block is difficult to repair.
  • Page 17 FM Stereo Separation Adjustment FM RDS S-Meter Adjustment Setting : Setting : D-BASS switch : OFF D-BASS switch : OFF SOURCE button : FM SOURCE button : FM FM RF signal FM RF signal generator generator level meter antenna antenna 10 k Ω...
  • Page 18 MW Auto Scan/Stop Level Adjustment Adjustment Location : tuner unit (TU601) Setting : D-BASS switch : OFF SOURCE t MODE button : MW 30 Ω 15 pF 65 pF AM RF signal generator AM dummy antenna (50 Ω ) TU601 antenna Carrier frequency : 999 kHz terminal...

  • Page 19: Cd Section

    CD SECTION Focus Gain Adjustment (Coarse adjustment) 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 20: Diagrams

    Not used. (Connect to ground in this set.) SQ CKO Sub Q read clock output UNI SI SONY BUS system serial interface input (Not used in this set.) UNI SO SONY BUS system serial interface output (Not used in this set.) UNI CK SONY BUS system serial clock input/output (Not used in this set.)
  • Page 21 Pin No. Pin Name Pin Description Pin No. Pin Name Pin Description AMP ON Power amplifier power control output — Not used. (Open) TXT ON Reset output to CD-TEXT decoder IC. (Not used in this set.) ANT REM ANT REMOTE power control output VOL ATT Electric volume mute control output —...

  • Page 22: Block Diagram -Cd Section

    CDX-2500R 4-2. BLOCK DIAGRAM — CD SECTION — OPTICAL PICK-UP RF AMP, SERVO CONTROL DIGITAL SIGNAL PROCESSOR D/A CONVERTER KSS-521A IC702 TUNER RF 0 PCMD VOUTL CD L-CH SECTION (Page 23) BCKIN R-CH CLKO VOUTR XLTO LRCK LRCIN DATA DATO...

  • Page 23: Block Diagram -Tuner Section

    CDX-2500R 4-3. BLOCK DIAGRAM — TUNER SECTION — ELECTRONIC (Page 22) VOLUME IC401 SECTION OUT FL TUNER UNIT CD L-CH MUTE TU601 Q110 CNJ600 ANT AM (ANTENNA) R 16 R-CH OUT RL 20 ANT FM AM DET 12 SE3L MUTE...

  • Page 24: Block Diagram -Display Section

    CDX-2500R 4-4. BLOCK DIAGRAM — DISPLAY SECTION — SYSTEM CONTROL LCD DRIVE IC801 (3/3) IC501 RESET RESET DATA BU5V IC902 LCD501 S900 RESET D910 BACK-UP BATT CHECK Q906 D807 BACK-UP BATT 76 BU IN CHECK Q917,918 PL501,502 LED501-505, LSW511-529 LCD POWER...

  • Page 25: Circuit Boards Location

    4-5. CIRCUIT BOARDS LOCATION • Waveforms (MODE:PLAY) THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) for schematic diagram: • All capacitors are in µF unless otherwise noted. pF: µµF Approx.

  • Page 26: Printed Wiring Boards -Cd Mechanism Section

    CDX-2500R 4-6. PRINTED WIRING BOARDS — CD MECHANISM SECTION — • Semiconductor Location Ref. No. Location (Page 29)

  • Page 27: Schematic Diagram -Cd Mechanism Section

    CDX-2500R 4-7. SCHEMATIC DIAGRAM — CD MECHANISM SECTION — • Refer to page 25 for Waveforms. • Refer to page 35 for IC Block Diagrams. (Page Note: • Voltage and waveforms are dc with respect to ground under no-signal conditions.

  • Page 28: Printed Wiring Board -Main Section

    CDX-2500R 4-8. PRINTED WIRING BOARD — MAIN SECTION — • Semiconductor Location (side A) Ref. No. Location D403 D603 D881 D909 D-10 D914 D918 D919 D920 D930 D940 D-10 IC401 IC601 IC602 IC603 IC801 Q110 Q111 Q210 Q211 Q615 Q618...
  • Page 29 CDX-2500R • Semiconductor Location (side B) Ref. No. Location Ref. No. Location D402 D915 G-12 D404 D916 I-13 D405 D924 E-13 D406 D407 IC200 D408 IC702 F-11 IC901 F-13 D409 D410 IC902 D411 D601 JW29 D604 D702 F-12 Q101 D807...

  • Page 30: Schematic Diagram -Main Section (1/3)

    CDX-2500R 4-9. SCHEMATIC DIAGRAM — MAIN SECTION (1/3) — • Refer to page 37 for IC Block Diagrams. Note: (Page 31) (Page 32) • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ) : MW <...

  • Page 31: Schematic Diagram -Main Section (2/3)

    CDX-2500R 4-10. SCHEMATIC DIAGRAM — MAIN SECTION (2/3) — • Refer to page 38 for IC Block Diagrams. (Page 30) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ) : MW <...

  • Page 32: Schematic Diagram -Main Section (3/3)

    CDX-2500R 4-11. SCHEMATIC DIAGRAM — MAIN SECTION (3/3) — • Refer to page 38 for IC Block Diagrams. (Page 30) (Page 33) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ) : MW <...

  • Page 33: Schematic Diagram -Display Section

    CDX-2500R 4-12. SCHEMATIC DIAGRAM — DISPLAY SECTION — (Page 32) Note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM...

  • Page 34: Printed Wiring Board -Display Section

    CDX-2500R 4-13. PRINTED WIRING BOARD — DISPLAY SECTION — (Page 29) • Semiconductor Location Ref. No. Location Ref. No. Location (D501) B-10 LED501 (D503) B-10 LED502 (D506) B-11 LED503 (D507) C-10 LED504 LED505 (D508) C-10 (IC501) ) : SIDE B...

  • Page 35: Ic Block Diagrams

    • IC Block Diagrams IC1 CXD2507AQ SERVO AUTO DATA SEQUENCER 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 ASYI ERROR FSTT...
  • Page 36 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 37 IC401 TDA7462D013TR SE3L SE3R MUTE PAUSE PAUSE DETECT FRONT INPUT TREBLE/ OUT FL VOICE BANDPASS LOUDNESS VOLUME FADER SOFT GAIN & BASS CONTROL SE1L CONTROL AUTO MUTE CONTROL CIRCUIT CIRCUIT SE1R ZERO CIRCUIT FRONT OUT FR MD– FADER CDL+ CDL– COMPANDER CDR–...
  • Page 38 IC601 TDA7427AD1TR LPOUT VDD1 VDD2 LP FM SWITCH CHARGE PHASE 11 BIT PROG LP1/LP2 GND AM PUMP COMP COUNTER LP HC LP AM SWITCH SWITCH SWM/DIR SWM/DIR V REF AM IN SWITCH AM/FM INLOCK 6 BIT PROG PRE COUNTER DETECTOR COUNTER :32/33 FM IN...

  • Page 39: Exploded Views

    SECTION 5 EXPLODED VIEWS NOTE: • The mechanical parts with no reference • Color Indication of Appearance Parts The components identified by number in the exploded views are not supplied. mark 0 or dotted line with mark Example : • Items marked “*” are not stocked since 0 are critical for safety.

  • Page 40: Front Panel Section

    5-2. FRONT PANEL SECTION not supplied (DISPLAY board) LCD501 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 3-019-549-51 BUTTON (RELEASE) * 61 X-3376-730-1 HOLDER (LCD) ASSY 3-019-544-11 KNOB (SEEK/AMS) * 62 3-030-879-01 BRACKET (LCD) 3-039-482-01 SPRING (RELEASE) * 63 3-032-198-01 SHEET (E) 3-032-410-01 BUTTON (MODE/SOUND)

  • Page 41: 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 DISC IN SW BOARD 3-931-902-04 ARM (ROLLER) * 102 A-3291-816-B CHASSIS (T) SUB ASSY 3-936-756-01 ROLLER (D) 3-931-909-01 SPRING (LR), TENSION 3-321-393-01 WASHER, STOPPER X-3371-501-1 LEVER (L) ASSY * 113...

  • Page 42: 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 A-3277-802-C CHASSIS (M) COMPLETE ASSY 3-931-897-01 DAMPER (T) 3-931-883-01 SPRING (TR), TENSION 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)

  • Page 43: Cd Mechanism Section (3)

    5-5. CD MECHANISM SECTION (3) (MG-363X-121) M901 M902 The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * 201...

  • Page 44: Electrical Parts List

    SECTION 6 DISC IN SW DISPLAY ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in • Items marked “*” are not stocked since The components identified by mark 0 or dotted line with mark the parts list may be different from the they are seldom required for routine service.
  • Page 45 DISPLAY Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark LSW521 1-762-619-21 SWITCH, KEY BOARD (WITH LED) (3) R522 1-216-045-00 METAL CHIP 1/10W (GREEN) R523 1-216-045-00 METAL CHIP 1/10W LSW522 1-762-617-21 SWITCH, KEY BOARD (WITH LED) (OFF) R524 1-216-049-11 RES-CHIP 1/10W...
  • Page 46 LIMIT SW LOAD SW MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-659-835-12 LIMIT SW BOARD C499 1-164-346-11 CERAMIC CHIP C601 1-163-235-11 CERAMIC CHIP 22PF *************** C602 1-164-182-11 CERAMIC CHIP 0.0033uF 10% < SWITCH > C603 1-163-021-11 CERAMIC CHIP 0.01uF...
  • Page 47 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C671 1-163-251-11 CERAMIC CHIP 100PF < DIODE > C692 1-164-004-11 CERAMIC CHIP 0.1uF C693 1-164-004-11 CERAMIC CHIP 0.1uF D402 8-719-109-71 DIODE MTZJ-T-77-3.9A C694 1-164-004-11 CERAMIC CHIP 0.1uF D403 8-719-914-43 DIODE DAN202K-T-146 C703...
  • Page 48 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark IC602 8-759-492-59 IC SAA6588T-118 Q610 8-729-216-22 TRANSISTOR 2SA1037K-T-146-S IC603 8-759-909-71 IC BA4558F-E2 Q612 8-729-216-22 TRANSISTOR 2SA1037K-T-146-S IC702 8-759-464-81 IC PCM1717E-ST2 Q613 8-729-120-28 TRANSISTOR 2SC2412K-T-146-R IC801 8-759-643-86 IC MB90574APMT-G-238-BND Q614 8-729-120-28 TRANSISTOR 2SC2412K-T-146-R IC901...
  • Page 49 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R216 1-216-065-11 RES-CHIP 4.7K 1/10W R647 1-216-057-00 METAL CHIP 2.2K 1/10W R217 1-216-129-00 METAL CHIP 2.2M 1/10W R648 1-216-295-00 SHORT R218 1-216-129-00 METAL CHIP 2.2M 1/10W R649 1-216-097-11 RES-CHIP 100K 1/10W...
  • Page 50 MAIN SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R861 1-216-105-11 RES-CHIP 220K 1/10W A-3309-227-A SERVO BOARD, COMPLETE R862 1-216-105-11 RES-CHIP 220K 1/10W *********************** R863 1-216-049-11 RES-CHIP 1/10W R865 1-216-097-11 RES-CHIP 100K 1/10W < CAPACITOR > R866 1-216-097-11 RES-CHIP 100K...
  • Page 51 SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < JUMPER RESISTOR > < TRANSISTOR > 1-216-296-00 SHORT 8-729-904-60 TRANSISTOR DTB113ZK-T-146 1-216-296-00 SHORT 8-729-904-86 TRANSISTOR 2SB1197K-T-146-Q 1-216-296-00 SHORT 1-216-296-00 SHORT < RESISTOR > 1-216-296-00 SHORT 1-216-073-00 METAL CHIP 1/10W 1-216-296-00 SHORT 1-216-097-11 RES-CHIP...
  • Page 52 CDX-2500R SERVO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < CERMET RESISTOR > PARTS FOR INSTALLATION AND CONNECTIONS *************************************** 1-238-091-11 RES, ADJ, CERMET 22K 1-238-091-11 RES, ADJ, CERMET 22K X-3373-600-1 FRAME ASSY X-3374-928-1 COLLAR ASSY ************************************************************* X-3370-077-1 SCREW ASSY (AE.KEY), FITTING...

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