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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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Table of Contents

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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 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 3 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 4 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 5 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 6 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 7 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 8 • 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 9 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 10 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 –...

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Cdx-4280

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