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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.
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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 ∗...
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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 <...
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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 <...
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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...