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Sony CDX-4250 Service Manual

Fm/am compact disc player
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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: Ic Pin Description

    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 3 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 4 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 5 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 6 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 7 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 8 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 9: 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 10 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 11 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...

This manual is also suitable for:

Cdx-4500