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XR-C7220/C7300/C7300W SERVICE MANUAL US Model Canadian Model XR-C7220 E Model XR-C7300/C7300W For RM-X4S (Remote Commander), please refer to RM-X4S Service Manual (9-925-698-) previously issued. Photo: XR-C7300 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-25G-136 SPECIFICATIONS ­ Continued on next page ­ FM/AM (MW/SW) CASSETTE CAR STEREO MICROFILM XR-C7220/C7300/C7300W 6-2. SCHEMATIC DIAGRAM ­ MAIN Section (1/3) ­ · See page 18 for Waveforms. · See page 33 for IC Block Diagrams. (Page 23) (Page 21) ­ 19 ­ ­ 20 ­ XR-C7220/C7300/C7300W 6-3. SCHEMATIC DIAGRAM ­ MAIN Section (2/3) ­ · See page 18 for Waveforms. · See page 33 for IC Block Diagrams. (Page 20) (Page 23) ­ 21 ­ ­ 22 ­ XR-C7220/C7300/C7300W 6-4. SCHEMATIC DIAGRAM ­ MAIN Section (3/3) ­ (Page 20) (Page 31) (Page 22) ­ 23 ­ ­ 24 ­ XR-C7220/C7300/C7300W 6-8. SCHEMATIC DIAGRAM ­ PANEL Section ­ · See page 18 for Waveform. (Page 24) ­ 31 ­ ­ 32 ­ · IC Block Diagrams ­ MAIN Board ­ IC1 TB2118F (EL) AM CP OUT FM CP OUT A-GND D-GND IC401 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 IFC VT XI AMP AMP REGULATOR SEEK/RECP + PHASE COMPARATOR REF SIG 20BIT IF COUNTER 40BIT SHIFT REGISTER 18BIT 22BIT 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 VDD LOUDNESS CONTROL CIRCUIT VOLUME CONTROL CIRCUIT SOFT MUTE VOICE BANDPASS HP LP 22 OUT FL INPUT MULTIPLEXER & MIXING STAGE 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 ON/OFF BUFFER 18BIT BEEP SUBWOOFER LP FADER 18 SUBOUT+ 17 SUBOUT­ SDA SERIAL INTERFACE I/O PORT OUTPUT PORT VDD2 SUBWOOFER OUT IIC BUS DIGITAL CONTROL CIRCUIT SCL 16 VDD 15 GND 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 IC301 CXA2510AQ-T4 LINEOUT1 TAPEIN1 PBOUT1 AUXIN1 PBEQ1 MSSW DIREF TCH1 IC361 GND 1 LB1638M 10 N.C. IC671 BA3918-V3 IC701 BA8270F-E2 GND 30 29 28 27 26 25 24 23 22 21 CONTROL LOGIC NC BUS ON 1 REGULATOR BUS ON SWITCH RESET SWITCH BATTERY SWITCH 14 VCC 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 NR IN1 2 9 OUT1 8 VS 7 OUT2 RST 2 20 MSMODE MS MODE 19 DRS