SERVICE MANUAL FM/AM COMPACT DISC PLAYER. US Model. Canadian Model CDX-C5750 SPECIFICATIONS CDX-C5750/C5850. Photo: CDX-C5750

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1 CDX-C70/C0 SERVICE MANUAL US Model CDX-C70/C0 Canadian Model CDX-C70 Photo: CDX-C70 SPECIFICATIONS AUDIO POWER SPECIFICATIONS (US Model) POWER OUTPUT AND TOTAL HARMONIC DISTORTION 7 watts per channel minimum continuous average power into ohms, channels driven from 0 Hz to 0 khz with no more than % total harmonic distortion. Model Name Using Similar Mechanism CD Drive Mechanism Type Optical Pick-up Name CDX-C0/C0 MG-T- KSS-A Other Specifications CD player section System Compact disc digital audio system Signal-to-noise ratio 0 db Frequency response 0,000 Hz Wow and flutter Below measurable limit Laser Diode Properties Material GaAlAs Wavelength 70 nm Emission Duration Continuous Laser output power Less than. µw* * This output is the value measured at a distance of 00 mm from the objective lens surface on the Optical Pick-up Block. Tuner section FM Tuning range Antenna terminal Intermediate frequency Usable sensitivity Selectivity Signal-to-noise ratio MHz External antenna connector.7 MHz dbf 7 db at 00 khz db (stereo), db (mono) Harmonic distortion at khz 0.7% (stereo), 0.% (mono) Separation db at khz Frequency response 0,000 Hz AM Tuning range 0,7 khz Antenna terminal External antenna connector Intermediate frequency.7 MHz/0 khz Sensitivity 0 µv Power amplifier section Outputs Speaker outputs (sure seal connectors) Speaker impedance ohms Maximum power output 0 W (at ohms) General Outputs Line outputs () Power antenna relay control lead Power amplifier control lead Telephone ATT control lead Tone controls Bass ± db at 0 Hz Treble ± db at khz Power requirements V DC car battery (negative ground) Dimensions Approx. 7 0 mm (7 / 7 / in.) (w/h/d) Mounting dimensions Approx. mm (7 / / / in.) (w/h/d) Mass Approx.. kg ( lb. oz.) Supplied accessories Parts for installation and connections ( set) Front panel case () Design and specifications are subject to change without notice. FM/AM COMPACT DISC PLAYER MICROFILM

2 CDX-C70/C0 -. SCHEMATIC DIAGRAM CD MECHANISM SECTION Refer to page for IC Block Diagrams. Refer to page for Waveforms. (Page ) note: Voltage and waveforms are dc with respect to ground under no-signal conditions. no mark : CD PLAY : Impossible to measure 7

3 CDX-C70/C0-7. SCHEMATIC DIAGRAM MAIN SECTION (/) Refer to page for IC Block Diagrams. (Page ) (Page ) note: Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ( ) : AM < > : CD PLAY

4 CDX-C70/C0 -. SCHEMATIC DIAGRAM MAIN SECTION (/) Refer to page for IC Block Diagrams. (Page ) (Page ) MB07PFV-G--BND note: Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM ( ) : AM < > : CD PLAY

5 CDX-C70/C0 -. SCHEMATIC DIAGRAM DISPLAY SECTION (Page ) note: Voltage is dc with respect to ground under no-signal (detuned) condition. no mark : FM 0

6 XPCK GFS RFCK IC Block Diagrams IC CXD07AQ IC0, 0 TDA7 (CDX-C0 only) IC CXA7BQ XLON SPOD SPOC SPOB SPOA CLKO XLTO DATO 0 7 CNIN SEIN CLOK XLAT VCCL PHD PHD PHD LD RF M RF O RF I CP CB CC CC FOK 0 7 FOK MON MDP MDS LOCK TEST FILO FILI PCO VSS AVSS CLTV A RF BIAS ASYI ASYO ASYE WDCK 7 7 DIGITAL PLL ASYMMETRY CORRECTOR SERVO AUTO SEQUENCER CPU INTERFACE K RAM SUB CODE PROCESSOR EFM DEMODULATOR ERROR CORRECTOR D/A INTERFACE DIGITAL CLV DIGITAL OUT CLOCK GENERATOR DATA XRST SENS MUTE SQCK SQSO EXCK SBSO SCOR VSS WFCK EMPH DOUT CM FSTT XTSL XTAO XTAI MNTO INL SVRL INML INMR SVRR INR 7 VCCR REFERENCE REFERENCE VCCL VCCL SIGNAL VCCR LIFT SIGNAL VCCR LIFT CL+ CL LGND OUTL OUTR RGND CR CR+ FE BIAS 7 APC RF IV RF IV LEVEL S SENS C.OUT XRST DATA LRCK PCMD BCLK GTOP XUGF CPO XROF MNT MNT 0 XLT CLK F IC BA7FP-T E VCC EI 0 OP IN OP IN + 7 VREF CH CH-IN LEVEL SHIFT CH CH-IN LEVEL SHIFT VCC VCC CH 0 CH-IN CH + LEVEL SHIFT CH 7 CH + CH 7 OPOUT CH-IN CH CTL CTL FWD REV TRAY GND CH COM CH + CH + CH VEE TED 7 ISET SL O SL M THERMAL SHUT DOWN LEVEL SHIFT LPFI TEI ATSC TZC TDFCT 7 SL P TA O LOGIC CTL CTL FWD REV V/I VC 7 FEO FEI FDFCT FGD FLB FE O FE M SRCH TGU TG FSET TA M FOK TTL MIRR IIL DATA REGISTER DFCT INPUT SHIFT REGISTER ADDRESS DECODER IIL TTL TTL FE IIL OUTPUT DECODER IIL F IV TOG- BAL- FS- TG- TM-7 PS- FZC COMP E IV BAL BAL TOG TOG BAL TOG TE HPF COMP TG LPF COMP TRACKING PHASE COMPENSATION TM TM TM ISET WINDOW COMP ATSC DFCT TZC COMP DFCT TM FCS PHASE COMPENSATION FS FS TG TM TM7 TM FS F SET

7 IC0 TDA7D PAUSE DETECT 7 SEL SER MUTE SDA SCL PAUSE SEL SER MD+ MD CDL+ CDL CDR CDR+ PDR PDGND PDL SEL SER 7 INPUT MULTIPLEXER & MIXING STAGE FRONT SIDE SELECTOR REAR SIDE SELECTOR INPUT GAIN & AUTO ZERO INPUT GAIN LOUDNESS CIRCUIT LOUDNESS CIRCUIT VOLUME CIRCUIT COMPANDER SOFT MUTE TREBLE/ BASS CIRCUIT VOICE BANDPASS HP LP FRONT FADER FRONT FADER REAR FADER REAR FADER 0 OUT FL OUT FR OUT RL OUT RR BEEP SUBWOOFER LP FADER SUBWOOFER OUT 7 SUBOUT+ SUBOUT DIGITAL CIRCUIT IIC BUS SDA SCL CREF POWER SUPPLY GND IC70 PCM77E-S IC0 BA0 XTI DGND CLK 0 XTO CLKO.7V LRCIN DIN BCKIN ZERO 7 INPUT INTERFACE DIGITAL FILTER LEVE DAC NOISE SHAPER MODE CONT ROL LEVEL DAC 7 ML/MUTE MC/DM MD/DM0 RSTB MODE ON + THERMAL SHUT DOWN CIRCUIT ON ON + REGULATOR VREF OVER VOLTAGE PROTECT D/C R LOWPASS FILTER CMOS LOWPASS FILTER CMOS D/C L GND VCC ON OUT OUT VOUTR AGND VOUTL VCC

8 IC0 TDA77AD LPOUT LP FM LP HC LP/LP CHARGE PUMP PHASE COMP BIT PROG COUNTER 7 GND AM LP AM V REF LCL/DX INLOCK DETECTOR SWM/DIR BIT PROG COUNTER SWM/DIR PRE COUNTER :/ AM/FM AM IN FM IN SEEK NIL 7 PORT EXTENSION TEST LOGIC MONO NC OSCIN OSCOUT REF OSCILLATOR BIT PROG COUNTER SUPPLY & POWER ON RESET GND D NC 0 ADDR SCL SDA I C BUS INTERFACE HFREF AMOSC BIT PROG COUNTER TIMER OUT 7 DOUT/INLOCK IF AM AM/FM - BIT PROG COUNTER SSTOP IF FM IC70 LC70M-T IC0 BA70F-E BUS ON BUS ON VCC EXCK SBSO SCOR WORD X BIT DUAL PORT RAM CPU INTERFACE CRC CHECKER DQSY SRDT RST BATT RESET BATTERY RST BUS ON CLK IN BU IN WFCK MCK XMODE GND 7 TIMING & SYNCHRONIZATION SIGNAL PROTECTION SCLK SW SW CLK VREF DATA GND 7 DATA IN DATA OUT TEST

9 -. IC PIN DESCRIPTION IC0 MB07PFV-G--BND (SYSTEM ) Pin No. Pin Name I/O Pin Description LD ON O Laser ON/OFF control output FOK I Focus OK signal detection input XLAT O CD signal processing latch output DATA O CD signal serial data output XRST O Reset output to CD signal processor IC. GFS I GFS signal detection input 7 NIL Not used. (Connect to ground in this set.) VCC Power supply pin (+ V) NIL Not used. (Open) FLS SI/NOSE I Front panel attachment detection input LCD SO/FLS SO O LCD serial data output LCD CKO O LCD serial clock output BEEP O BEEP output NIL Not used. (Open) 7 SQ SI I Sub Q data input NIL Not used. (Connect to ground in this set.) SQ CKO O Sub Q read clock output 0 UNI SI I BUS system serial interface input UNI SO O BUS system serial interface output UNI CK I/O BUS system serial clock input/output C IN I Track jump No. count input SIRCS I Remote commander input TXT SI I CD-TEXT data input NIL Not used. (Connect to ground in this set.) 7 TXT CKO O CD-TEXT data read clock output CLOK O CD signal processing serial clock output SYSRST O System reset output 0 DEEMPH O De-emphasis output ATT O Power amplifier attenuator control output MD ON O CD mechanism power control output VSS Ground C Power stabilization capacitor pin CD ON O CD power control output BUS ON O BUS ON control output 7 AD ON O Power control output of A/D conversion. DVCC VREF input of D/A converter. DVSS Ground of D/A converter. 0 NIL Not used. (Open) ANGLE O LCD view angle alignment output (Not used in this set.) AVCC Analog power supply pin (+ V) AVRH VREF + input of A/D converter. AVRL VREF input of A/D converter. AVSS Analog ground KEY IN0 I Key input 0 RC IN0 I Rotary commander input 0 0 QUALITY I Not used in this set. NIL Not used. (Connect to ground in this set.) MPDH I Tuner multi path input (Not used in this set.) S-METER I S-meter voltage detection input VCC Power supply pin (+ V) NS MASK O Not used in this set.

10 Pin No. Pin Name I/O Pin Description ON O Power amplifier power control output 7 TXT ON O Reset output to CD-TEXT decoder IC. VOL ATT O Electric volume mute control output NIL Not used. (Open) 0 ATT O System attenuate control output RC IN I Rotary commander shift key input TU ATT O Tuner attenuate output (Not used in this set.) VSS Ground NIL Not used. (Open) SSTOP I IF counter result signal detection input of PLL. TEST I Test mode initial setting detection input 7 DAVN I RDS IC data acquisition detection input (Fixed at L in this set.) FM ON/AM ON O FM ON output TU ON O Tuner power control output 70 SDA I/O I C BUS serial data input/output 7 SCL O I C BUS serial clock output 7 NOSE I Front panel OPEN detection input (Not used in this set.) 7 XA O Sub ceramic oscillator output ( khz) 7 X0A I Sub ceramic oscillator input ( khz) 7 SCOR I SCOR signal detection input 7 BU IN I Backup power detection input 77 DQSY I CD-TEXT data setting completion signal detection input 7 CD SENS I CD SENS signal detection input 7 KEY ACK I Key input acknowledge 0 TEL ATT I Telephone attenuate detection input ST/MONO I/O Tuner stereo signal detection input/forced monaural output SEEKOUT O SEEK output SD IN I Signal detector input WIDE O WIDE/NARROW select output (Not used in this set.) NARROW O WIDE/NARROW select output (Not used in this set.) HSTX Hardware standby input (Connect to pin (º (RESET).) 7 MD Operation mode input (Connect to ground in this set.), MD, 0 Operation mode input (Connect to VCC in this set.) 0 RESET I Reset input VSS Ground X0 I Main ceramic oscillator input (. MHz) X O Main ceramic oscillator output (. MHz) VCC Power supply pin (+ V) COMV ON O COM V control output NIL Not used. (Open) 7 AREA I Destination select input (Fixed at L in this set.) AREA I Destination select input (Fixed at L in this set.) AREA I Destination select input (Fixed at L (CDX-C70) or H (CDX-C0) in this set.) 0 BAND I Not used in this set. ACC IN I Accessory power detection input, PH, I Disc insertion detection photo sensor input (Not used in this set.) LCD CE O LCD chip enable output FLS W I Flash write input (Fixed at H in this set.), 7 RE IN0, I Rotary encoder input ILL ON O Illumination power control output PW ON O System power control output 0 NIL Not used. (Open) ANT REM O ANT REMOTE power control output

11 Pin No. Pin Name I/O Pin Description, NIL Not used. (Open) CD LD O Loading motor control output (Loading direction) CD EJ O Loading motor control output (Eject direction) L SW I Sled limit switch detection input 7 IN SW/(PH) I Disc insertion detection input D SW I DOWN switch detection input VSS Ground SELF SW/(IN SW) I Disc self store detection input 7