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File name XR-C6120.pdf

XR-C6120 SERVICE MANUAL US Model Canadian Model Dolby noise reduction manufactured under license from Dolby Laboratories Licensing Corporation. "DOLBY" and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation. Model Name Using Similar Mechanism Tape Transport Mechanism Type XR-C5100 MG-25F-136 SPECIFICATIONS FM/AM CASSETTE CAR STEREO MICROFILM XR-C6120 6-3. SCHEMATIC DIAGRAM ­ MAIN Board (1/2) ­ · See page 29 for Waveforms. · See page 27 for IC Block Diagrams. ­ 19 ­ ­ 20 ­ XR-C6120 6-4. SCHEMATIC DIAGRAM ­ MAIN Board (2/2) ­ · See page 28 for IC Block Diagrams. (Page 25) ­ 21 ­ ­ 22 ­ XR-C6120 6-6. SCHEMATIC DIAGRAM ­ KEY Board ­ · See page 29 for Waveform. (Page 22) ­ 25 ­ ­ 26 ­ · IC Block Diagrams ­ MAIN Board ­ IC21 TB2118F-EL-S AM CP OUT FM CP OUT A-GND D-GND IC331 TDA7462D 24 23 22 21 20 19 18 17 AMP 16 15 14 13 PAUSE DETECT INPUT GAIN & AUTO ZERO TREBLE/ BASS CONTROL CIRCUIT FRONT FADER 28 27 26 25 24 23 SE3L SE3R MUTE SDA SCL PAUSE AM IN FM IN VDD REG VCC VCC 4BIT SWALLOW COUNTER SEEK/RECP PRESCALLER 12BIT PROGRAMMABLE COUNTER 20BIT IF COUNTER 40BIT SHIFT REGISTER 18BIT ON/OFF BUFFER SERIAL INTERFACE I/O PORT OUTPUT PORT VDD2 AMP INPUT MULTIPLEXER & MIXING STAGE AMP REGULATOR SEEK/RECP + PHASE COMPARATOR REF SIG SE1L SE1R MD+ MD­ CDL+ CDL­ CDR­ CDR+ PDR PDGND PDL SE2L SE2R 1 2 3 4 5 6 7 8 9 10 11 12 13 FRONT SIDE SELECTOR + ­ + + ­ IFC VT XI VDD LOUDNESS CONTROL CIRCUIT VOLUME CONTROL CIRCUIT SOFT MUTE VOICE BANDPASS HP LP 22 OUT FL FRONT FADER COMPANDER REAR FADER LOUDNESS CONTROL CIRCUIT 21 OUT FR REAR SIDE SELECTOR 20 OUT RL INPUT GAIN OSCILLATOR REFERENCE DIVIDER REAR FADER 19 OUT RR 22BIT BEEP SUBWOOFER LP FADER 18 SUBOUT+ 17 SUBOUT­ SDA DIGITAL CONTROL CIRCUIT IIC BUS SCL 16 VDD 15 GND 18BIT SUBWOOFER OUT 1 XO 2 OSC 3 4 5 6 CE DIN CK DOUT 7 SR 8 I/O-1 9 I/O-2 10 11 OUT-1 OUT-2 12 VDD2 CREF 14 POWER SUPPLY IC351 IC301 CXA2510AQ-T4 LINEOUT1 TAPEIN1 PBOUT1 AUXIN1 PBEQ1 MSSW DIREF VCC 1 NC 2 IN1 3 IN2 4 LB1930M-TLM 10 NC BUFFER CONTROL CIRCUIT BUFFER MOTOR DRIVE CIRCUIT 9 OUT1 8 NC 7 OUT2 6 P-GND IC611 BA3918-V2 TCH1 GND NC REGULATOR 30 29 28 27 26 25 24 23 22 21 NR T2 ­ + PBFB1 31 PBRIN1 32 PBREF1 33 PBFIN1 34 F2 TAPE EQ FWD/RVS VCT 35 PBGND 36 VCT + PBFIN2 37 PBREF2 38 PBRIN2 39 PBFB2 40 T1 120µ/ 70µ 1 PBEQ2 2 PBOUT2 3 VCC 4 5 TAPEIN2 AUXIN2 6 MSLPF 7 LINEOUT2 ­ + + ­ F1 F3 X1 LPF VCC + ­ NR BIAS X1 TAPE/AUX + ­ OFF/B 120µ/ 70µ S-GND 5 20 MSMODE MS MODE 19 DRSW 18 TAPESW 17 INSW NR MODE 16 NRSW OVER VOLTAGE PROTECT + ­ 11 FM 12 GND + ­ 10 AM + ­ 5 VDD 6 AMP 7 VCC 8 ANT 9 COM + ­ MS ON/ 15 NC OFF DETECT 14 MSOUT 13 DGND IC581 BA8270F-E2 BUS ON SWITCH RESET SWITCH BATTERY SWITCH 14 VCC 1 NC 2 3 4 MODE2 MODE1 STB BUS ON 1 RST 2 12 MSTC OFF/B NR 8 9 10 TCH2 NC PLAY 11 FF BATT 3 13 12 11 10 RST BUS ON CLK IN BU IN CLK 4 VREF 5 DATA 6 GND 7 9 DATA IN 8 DATA OUT ­ 27 ­ ­ 28 ­ · Waveforms ­ MAIN