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CDX-C4750/C6600 SERVICE MANUAL US Model CDX-C4750 E Model CDX-C6600 Photo: CDX-C4750 SPECIFICATIONS Model Name Using Similar Mechanism CDX-C480/C580 CD Drive Mechanism Type MG-363X-121 AUDIO POWER SPECIFICATIONS (US Model) Optical Pick-up Name KSS-521A POWER OUTPUT AND TOTAL HARMONIC DISTORTION 17 watts per channel minimum continuous average power into 4 ohms, 4 channels driven from 20 Hz to 20 kHz with no more than 1% total harmonic distortion.
COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! 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.
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SECTION 1 GENERAL This section is extracted from CDX-C4750’s instruction manual. – 3 –...
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 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...
2-5. MAIN BOARD 3 ground point screws (PTT 2.6x6) 2 ground point screw (PTT 2.6x6) 4 MAIN board 1 PTT 2.6x8 2-6. HEAT SINK 4 heat sink 3 PTT 2.6x8 2 PTT 2.6x12 1 PTT 2.6x8 – 12 –...
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 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...
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.
SECTION 3 ELECTRICAL ADJUSTMENTS 0 dB = 1 µV TUNER SECTION FM SENS/IF Adjustment Setting: SOURCE button : FMI Cautions during repair D-BASS switch : OFF When the tuner unit is defective, replace it by a new one because Frequency Select switch (E model) : FM 200K its internal block is difficult to repair.
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AM Auto Scan/Stop Level Adjustment Setting: digital voltmeter SOURCE n MODE button : AM D-BASS switch : OFF Frequency Select switch (E model) : AM 10K S-METER OUT – AM RF signal level dummy antenna generator meter antenna terminal 30 Ω 15 pF 4 Ω...
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.
CDX-C4750/C6600 4-2. BLOCK DIAGRAM — MAIN SECTION — PJ400 PJ400 FRONT ELECTRONIC VOLUME R-CH R-CH IC401 PJ401 BUS AUDIO IN LINE OUT TUNER ASSY TU601 OUT FL SE2L SECTION TONE CNJ600 REAR SE1L (ANT) FM L-CH R-CH SE3L OUT RL...
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• Waveforms (MODE:PLAY) 4-3. CIRCUIT BOARDS LOCATION THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this, the necessary note is printed in each block.) DISC IN SW board SUB board for schematic diagram: • All capacitors are in µF unless otherwise noted. pF: µµF tuner assy Approx.
CDX-C4750/C6600 4-5. SCHEMATIC DIAGRAM — CD MECHANISM SECTION — • Refer to page 24 for Waveforms. • Refer to page 41 for IC Block Diagrams. note: • Voltage and waveforms are dc with respect to ground under no-signal conditions. no mark : CD PLAY ∗...
CDX-C4750/C6600 4-7. SCHEMATIC DIAGRAM — MAIN SECTION (1/2) — • Refer to page 43 for IC Block Diagrams. (Page 35) note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ) : AM <...
CDX-C4750/C6600 4-8. SCHEMATIC DIAGRAM — MAIN SECTION (2/2) — • Refer to page 44 for IC Block Diagrams. (Page 34) (Page 39) IC801 MB90574PFV-G-193-BND note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ) : AM <...
CDX-C4750/C6600 4-10. SCHEMATIC DIAGRAM — DISPLAY SECTION — (Page 36) note: • Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM – 39 – – 40 –...
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• IC Block Diagrams IC1 CXD2507AQ IC2 CXA1782BQ 27 26 25 SERVO AUTO SEQUENCER DATA XRST SENS SUB CODE MUTE INTERFACE PROCESSOR SQCK DIGITAL LOCK SQSO TEST EXCK LEVEL S SBSO FILO SCOR DIGITAL FILI DEMODULATOR WFCK EMPH AVSS CLTV ASYMMETRY AVDD CORRECTOR...
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IC401 TDA7462D SE3L SE3R MUTE PAUSE PAUSE DETECT FRONT INPUT TREBLE/ OUT FL LOUDNESS VOICE BANDPASS VOLUME FADER GAIN & SOFT BASS CONTROL CONTROL SE1L AUTO MUTE CONTROL CIRCUIT CIRCUIT SE1R ZERO CIRCUIT FRONT MD– OUT FR FADER CDL+ CDL– COMPANDER CDR–...
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IC601 TDA7427AD1 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...
4-11. IC PIN DESCRIPTION • IC801 MB90574PFV-G-193-BND (SYSTEM CONTROL) Pin No. Pin Name Pin Description LD ON Laser ON/OFF control output Focus OK signal detection input XLAT25 CD signal processing latch output DATA25 CD signal serial data output XRST Reset output to CD signal processor IC. GFS signal detection input —...
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COM8V ON COM 8V control output — Not used. (Open) AREA1 Destination select input 1 (Fixed at “L” (CDX-C4750) or “H” (CDX-C6600) in this set.) AREA2 Destination select input 2 (Fixed at “L” (CDX-C6600) or “H” (CDX-C4750) in this set.) AREA3 Destination select input 3 (Fixed at “L”...
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Pin No. Pin Name Pin Description — Not used. (Open) ANT REM ANT REMOTE power control output 112, 113 — Not used. (Open) CD LD Loading motor control output (Loading direction) CD EJ Loading motor control output (Eject direction) L SW Sled limit switch detection input IN SW/(PH1) Disc insertion detection input...
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. Example : mark ! or dotted line with mark. • Items marked “*” are not stocked since ! are critical for safety.
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...
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 the parts list may be different from the they are seldom required for routine service. mark ! or dotted line with mark.
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DISPLAY LIMIT SW LOAD SW MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R522 1-216-045-00 METAL CHIP 1/10W A-3294-607-A MAIN BOARD, COMPLETE (C4750) R523 1-216-045-00 METAL CHIP 1/10W A-3294-642-A MAIN BOARD, COMPLETE (C6600) R524 1-216-049-11 RES,CHIP 1/10W ********************* R525...