XR-C8220 SERVICE MANUAL US Model E Model For RM-X4S (Remote Commander), please refer to RM-X4S Service Manual (9-925-698-∏) previously issued. 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-C9100 MG-25D-136 SPECIFICATIONS FM/AM CASSETTE CAR STEREO MICROFILM XR-C8220 6-8. SCHEMATIC DIAGRAM – MAIN Section (1/4) – • See page 28 for Waveforms. • See page 47 for IC Block Diagrams. (Page 35) (Page 39) (Page 38) – 33 – – 34 – XR-C8220 6-9. SCHEMATIC DIAGRAM – MAIN Section (2/4) – • See page 48 for IC Block Diagrams. (Page 34) (Page 38) (Page 40) – 35 – – 36 – XR-C8220 6-10. SCHEMATIC DIAGRAM – MAIN Section (3/4) – • See page 28 for Waveforms. • See page 47 for IC Block Diagrams. (Page 34) (Page 35) (Page 39) – 37 – – 38 – XR-C8220 6-11. SCHEMATIC DIAGRAM – MAIN Section (4/4) – • See page 49 for IC Block Diagrams. (Page 36) (Page 34) (Page 46) (Page 38) (Page 46) (Page 46) (Page 46) – 39 – – 40 – XR-C8220 6-13. SCHEMATIC DIAGRAM – PANEL Section – • See page 28 for Waveforms. (Page 46) – 43 – – 44 – XR-C8220 6-14. 6-15. PRINTED WIRING BOARD – SUB/INVERTER Section – (Page 32) SCHEMATIC DIAGRAM – SUB/INVERTER Section – • See page 28 for Waveform. (Page 42) (Page 40) (Page 43) (Page 31) (Page 40) (Page 40) (Page 32) (Page 32) – 45 – (Page 40) – 46 – • IC Block Diagrams – MAIN Board – IC10 BU2624FV-E2 IC201 20 XOUT LB1638M 10 N.C. GND 1 XIN REFERENCE DIVIDER 1 2 CK 4 DA 5 CD 6 P0 7 P1 9 16 FMIN PRESCALER VCC 3 9 OUT1 8 VS 7 OUT2 IN2 4 I/O CTL SHIFT REGISTER LATCH 15 AMIN IF COUNT CTL 14 P2 20BIT COUNT 13 IFIN P3 10 12 SD 11 P4 TAPEIN1 AUXIN1 DIREF LINEOUT1 TCH1 29 28 27 26 25 24 23 22 21 120µ/ 70µ MSSW GND 30 NC PBOUT1 CXA2510AQ-T4 PBEQ1 NR T2 + – OFF/B IC250 IN1 2 17 VDD MAIN COUNT CE 18 PD CONTROL LOGIC 19 VSS PHASE DET 20 MSMODE – + NR BIAS PBFB1 31 PBRIN1 32 MS MODE X1 19 DRSW TAPE/AUX 18 TAPESW 17 INSW F2 PBREF1 33 TAPE EQ PBFIN1 34 NR MODE FWD/RVS VCT 35 PBGND 36 VCT MS ON/ 15 NC OFF VCC + LPF 16 NRSW + – DETECT 14 MSOUT PBFIN2 37 F3 F1 PBREF2 38 13 DGND X1 PBRIN2 39 PBFB2 40 12 MSTC + – – + T1 120µ/ 70µ OFF/B 11 FF 2 3 4 5 6 7 8 9 10 PBOUT2 VCC TAPEIN2 AUXIN2 MSLPF LINEOUT2 TCH2 NC PLAY 1 PBEQ2 NR – 47 – GND 5 6 N.C. LDLC1 LDHC1 INAO1 VRIN1 VOUT1 TIN1 TCLC1 TCLC11 TCLC12 TCO1 FDIN1 CXA1946BQ-T6 GAIN134 IC301 36 35 34 33 32 31 30 29 28 27 26 25 VOLUME 8dB STEP LOUD 37 38 39 40 41 42 TONE FADER 24 FNTO1 23 REO1 VCTBUFF INPUT SW GAIN12 GAIN11 IN14 IN13 IN12 IN11 VOLUME 1dB STEP VCTBUFF VCTBUFF LATCH CONTROL LATCH ZCDET 22 21 20 19 CE CLK DGND GND 18 17 16 15 VCC VCT DATA TIMER 45k SHIFT REGISTER 45k VCTBUFF VCTBUFF VCTBUFF VOLUME 8dB STEP 2 3 4 5 6 7 8 9 10 11 12 INAO2 VRIN2 VOUT2 TIN2 TCLC2 TCLC21 TCLC22 TCO2 FDIN2 FADER BUFFER VCCL SVRL 3 LIFT AMP BUFFER REFERENCE VCCL SIGNAL AMP INAO 1 VRIN 1 OUT 1 N.C. GND VCT VCC CXA1846BN-T4 VCT 1 IC350 TDA8574 (T) VCCL 1 INL 2 14 REO2 13 FNTO2 INN 1 IC310, 410 TONE LDLC2 GAIN234 1 VOLUME 1dB STEP LDHC2 LOUD INP 1 43 44 45 46 47 48 INPUT SW IN21 IN22 IN23 IN24 GAIN21 GAIN22 20 19 18 17 16 15 14 13 12 11 16 CL+ – + 15 CL– 8dB STEP VOLUME LATCH CONTROL LATCH 14 LGND 1dB STEP VOLUME VCT BUFFER ZC DET 13 OUTL INML 4 SHIFT REGISTER VCCR INMR 5 12 OUTR SIGNAL AMP 8dB STEP VOLUME + – 11 RGND 1dB STEP VOLUME BUFFER 9 CR+ VCCR 8 – 48 – 1 2 3 4 5 6 7 8 9 10 VCT 2 INAO 2 VRIN 2 OUT 2 CE DATA CLK INIT 10 CR– SVRR 6 INR 7 VCCR LIFT AMP INP 2 BUFFER INN 2 REFERENCE IC502 BA3918-V3 IC602 REGULATOR OVER VOLTAGE PROTECT + – + – – + BUS ON 1 BUS ON SWITCH RST 2 RESET SWITCH BATT 3 BATTERY SWITCH CLK 4 VREF 5 DATA 6 + – VDD AMP VCC 9 10 11 12 GND NC IC650 IC650 8 FM 7 AM 6 ANT 5 COM 2 3 4 MODE2 MODE1 STB GND 7 1 MSM6656A-687GS-KR1 (US model) MSM6656A-689GS-KR1 (E model) 24 23 22 21 20 VDD 1 2 3 4 5 6 NC 7 ST 8 XT XT NC CMD NC OSC TIMMING CONTROLLER BEEP TONE GENARATOR LPF I/O INTERFACE MELODY GENARATOR 12 BIT DAC GND AOUT NAR NC BUSY 19 NC 18 NC 17 RESET 12 PCM SYNTHSIZER 17 BIT ADDRESS COUNTER 17 BIT MULTIPLEXER 7 10 11 12/PoRT0 13/PoRT1 9 10 11 12 ADDRESS & COMMAND CONTROLLER DATA CONTROLLER 1M BIT ROM EDITING ROM & ADDRESS ROM CONTAINS 22KBIT ADPCM SYNTHESIZER 8 16 15 14 13 CH 16/SD 15/SI 14 – 49 – BA8270F-E2 14 VCC 13 12 11 10 RST BUS ON CLK IN BU IN 9 DATA IN 8 DATA OUT 6-16. IC PIN FUNCTION DESCRIPTION • MAIN BOARD IC600 MB90574PFV-G-182-BND (SYSTEM CONTROLLER) Pin No. Pin Name I/O Function 1 SEEKOUT O Seek control signal output to the FM/AM tuner unit (TUX10) AM mode: Used for IF count output/SD output request/AGC cut at SEEK or BTM FM mode: Used for SD speed up at SEEK, BTM, or AF “L” is output at tuner off 2 AF-SEEK O PLL low-pass filter time constant selection signal output at AF SEEK “H” is output when AF SEEK Not used (open) 3 WIDE O IF band select signal output to the FM/AM tuner unit (TUX10) “H”: wide mode In receiving FM signals, interference noise from adjacent stations is removed by narrowing the IF band automatically in the tuner unit so as to raise the selectivity, but in this case, the distortion may increase and accordingly, the IF band is widened forcibly 4 ST-MONO I/O FM stereo broadcasting detection signal input from the FM/AM tuner unit (TUX10), or forced monaural control signal output to the FM/AM tuner unit (TUX10) “L” is input in the FM stereo mode, or “L” is output in the forced monaural mode 5 TUNMUTE O Muting on/off control signal output of the FM and AM tuner signal “H”: muting on 6 FM-ON O FM system power supply on/off control signal output to the BA3918 (IC502) “L”: AM power on, “H”: FM power on 7 TU-ON O Tuner system power supply on/off control signal output to the BA3918 (IC502) “H”: tuner power on 8 VCC — Power supply terminal (+5V) 9 CSV-RST O Reset signal output to the CSV (IC650) 10 BUS-ON O Bus on/off control signal output to the SONY bus interface (IC602) “L”: bus on 11 SYSRST O Reset signal output to the SONY bus interface (IC602) “L”: reset 12 DOORSW I Front panel open/close detection signal input “L” is input when the front panel is closed 13 LCD SO O Serial data output to the liquid crystal display driver (IC900) 14 LCD CKO O Serial data transfer clock signal output to the liquid crystal display driver (IC900) 15 BEEP O Beep sound drive signal output terminal 16 LCD CE O Chip enable signal output to the liquid crystal display driver (IC900) “H” active 17 UNISI I Serial data input from the SONY bus interface (IC602) 18 UNISO O Serial data output to the SONY bus interface (IC602) 19 UNICKO O Serial data transfer clock signal output to the SONY bus interface (IC602) 20 SD-IN I Station detector detect input from the FM/AM tuner unit (TUX10) Stop level for SEEK, BTM, etc. is determined SD is present at input of “H” 21 CSV-SO O Serial data output to the CSV (IC650) 22 CSV-CKO O Serial data transfer clock signal output to the CSV (IC650) “L”: reset 23 CSV-CE O Chip enable signal output to the CSV (IC650) “L” active 24 SIRCS I Sircs remote control signal input from the remote control receiver (IC901) 25 PLLSI I PLL serial data input from the FM/AM PLL (IC10) 26 PLLSO O PLL serial data output to the FM/AM PLL (IC10) 27 PLLCKO O PLL serial data transfer clock signal output to the FM/AM PLL (IC10) 28 PLLCE O PLL chip enable signal output to the FM/AM PLL (IC10) “H” active O Power on/off control signal output of the illumination LED and liquid crystal display driver (IC900) “H”: power on Depends on initial setting of power select switch (S600) Power select switch (S600) on: “H” output at the accessory on Power select switch (S600) off: “H” output at the power on 29 ILL-ON 30 DIMMER I/O Dimmer control in/out terminal At initial mode: The presence of dimmer select function is set (if this status, if “L” is input, the dimmer select function is present) At normal mode: LCD back light brightness control signal output 31 TIR-IND O LED drive signal output of the TIR indicator “H”: LED on Not used (open) – 50 – Pin No. Pin Name I/O Function 32 LCD INH O Blank indicate control signal output to the liquid crystal display driver (IC900) “L”: no display 33 VSS — Ground terminal 34 C — Connected to coupling capacitor for the power supply 35 AD-ON O A/D converter power control signal output terminal When the KEYACK (pin &§) that controls reference voltage power for key A/D conversion input is active, “L” is output from this terminal to enable the input 36 RE-IN0 I 37 RE-IN1 I 38 DVCC — Power supply terminal (+5V) (for D/A converter) 39 DVSS — Ground terminal (for D/A converter) 40 — I Not used (fixed at “L”) 41 LCDANG O View field angle control signal is output when front panel is fully opened “H”: front panel is fully opened 42 AVCC — Power supply terminal (+5V) (for A/D converter) 43 AVRH I Reference voltage (+5V) input terminal (for A/D converter) 44 AVRL I Reference voltage (0V) input terminal (for A/D converter) 45 AVSS — 46 KEYIN0 I Key input terminal (A/D input) (LSW900, S900, LSW901 to LSW908) OFF, SEEK/AMS + + ) = 0 – , MODE *, SOURCE, SOUND, DSPL, SHIFT, 1, 2, 3 keys input 47 KEYIN1 I Key input terminal (A/D input) (SW801, LSW909, LSW912 to LSW918) 6, LIST, 10, 9, 8, 7, 6, 5, 4 keys input 48 RC-IN0 I Rotary remote commander key input terminal (A/D input) 49 DSTSEL0 I Destination setting terminal (fixed at “L”) 50 DSTSEL1 I Destination setting terminal (fixed at “H”) 51 DSTSEL2 I Destination setting terminal (US model: fixed at 3/4 voltage, E model: frequency select switch input) 52 MTP I Multi-path detection signal input from the RDS decoder 53 VSM I FM and AM signal meter voltage detection input from the FM/AM tuner unit (TUX10) (A/D input) 54 VCC — 55 RAMBU I Internal RAM reset detection signal input from the RN5VD33AA (IC501) Input terminal to check that RAM data are not destroyed due to low voltage This checking is made within 100 msec after reset 56 POWSEL I Power select switch (S600) input terminal 57 EQ-SEL I Not used (fixed at “H”) 58 TESTIN I Setting terminal for the test mode 59 PACK-IND O LED drive signal output of the tape window illumination and 6 indicators (LED800, 802) “H”: LED on “H” is output to turn on LED when front panel is opened 60 TIR-PLAY O AM/TIR selection signal output terminal Not used (pull down) 61 SUB-SW1 O Sub woofer output cut-off frequency select signal output terminal 62 SUB-SW0 O Sub woofer output cut-off frequency select signal output terminal 63 VSS — Ground terminal 64 VOLCE O Chip enable signal output to the main electrical volume (IC301) 65 MUTE O Audio line muting on/off control signal output terminal 66 VOLSO/ SUBSO O Serial data output to the main electrical volume (IC301) and sub electrical volume (IC350) 67 VOLCKO/ SUBCKO O Serial data transfer clock signal output to the main electrical volume (IC301) and sub electrical volume (IC350) Dial pulse input of the rotary encoder (RE900) (for VOLUME/BASS/TREBLE/BALANCE/FADER control) Ground terminal (for A/D converter) Not used (open) Power supply terminal (+5V) – 51 – “L”: off (halt mode), “H”: on (operation mode) “L”: test mode, Normally: fixed at “H” “L”: AM signal, “H”: TIR signal “H”: active “H”: muting on Pin No. Pin Name I/O Function 68 SUBCE O Chip enable signal output to the sub electrical volume (IC350) “H” active 69 FLASH-W I Internal flash memory data write mode detection signal input terminal “L”: data write mode Not used (fixed at “H” in this set) 70 IIC SIO I/O Two-way data bus with the external device Not sued (fixed at “H”) 71 IIC CKO O Bus clock signal output to the external device Not sued (pull-up) 72 RC-IN1 I Rotary remote commander shift key input terminal “L”: shift 73 X1A O Sub system clock output terminal (32.768 kHz) 74 X0A I Sub system clock input terminal (32.768 kHz) 75 DAVN I Data transmit completed detect signal input from the RDS decoder “H” active Not sued (open) 76 KEYACK I Input of acknowledge signal for the key entry Acknowledge signal is input to accept function and eject keys in the power off status On at input of “H” 77 BU-IN I Battery detect signal input from the SONY bus interface (IC602) and battery detect circuit “L” is input at low voltage 78 ILL IN I Auto dimmer control illumination line detection signal input terminal “L” is input at dimmer detection 79 TEL-ATT I Telephone muting signal input terminal At input of “H”, the signal is attenuated by –20 dB 80 NOSESW I Front panel block remove/attach detection switch (SW500) input terminal “L”: front panel is attached 81 ACC IN I Accessory detect signal input terminal “L”: accessory on 82 to 85 TIR-D0 to TIR-D3 I/O 86 HSTX I Hardware standby input terminal “L”: hardware standby mode Reset signal input in this set 87 MD2 I Setting terminal for the CPU operational mode (fixed at “L” in this set) 88 MD1 I Setting terminal for the CPU operational mode (fixed at “H” in this set) 89 MD0 I Setting terminal for the CPU operational mode (fixed at “H” in this set) 90 RESET I System reset signal input from the reset signal generator (IC500) and reset switch (SW800) “L”: reset “L” is input for several 100 msec after power on, then it changes to “H” 91 VSS — 92 X0 I Main system clock input terminal (3.68 MHz) 93 X1 O Main system clock output terminal (3.68 MHz) 94 VCC — Power supply terminal (+5V) 95 TIR-BUSY I Busy detection signal input from the external device Not used (fixed at “L”) 96 TIR-WR O Data write strobe signal output to the external device Not used (open) 97 TIR-CE0 O Chip enable signal output to the external device Not used (open) 98 TIR-CE1 O Chip enable signal output to the external device Not used (open) 99 TIR-RES O Reset signal output to the external device “H”: reset Not used (open) 100 TIR-PDOWN O Power down control signal output to the external device “L”: power down Not used (open) 101 TIR-RD O Data read strobe signal output to the external device Not used (open) 102 MTLIN I Metal detection signal input terminal “L”: normal position, “H”: metal position 103 AMSIN I Whether a music is present or not from CXA2510AQ (IC250) is detected at auto music sensor “L”: music is present, “H”: music is not present 104 REEL I Rotation detect signal input from supply reel sensor and take-up reel sensor on the deck mechanism 105 POS0 I 106 POS1 I 107 POS2 I 108 POS3 I 109 LM-EJ O Two-way data bus with the external device Not used (open) Ground terminal Tape position (EJECT/FF/REW/ REV/FWD mode) detect input from the tape operation switch on the deck mechanism POS0: “L”: EJECT mode, “H”: others mode POS1: “L”: FF and FWD mode, “H”: others mode POS2: “L”: REW mode, “H”: others mode POS3: “L”: REV and EJECT mode, “H”: others mode Motor drive signal output to the loading/tape operation motor drive (IC201) “H” active (For the eject direction and reverse side operation) *1 – 52 – Pin No. Pin Name I/O Function LM-LOD O Motor drive signal output to the loading/tape operation motor drive (IC201) (For the loading direction and forward side operation) *1 111 CM-ON O Capstan/reel motor (M901) drive signal output terminal 112 TAPEON O Tape system power supply on/off control signal output terminal 113 N-ROUT O Forward/reverse direction control signal output to the CXA2510AQ (IC250) “L”: forward direction, “H”: reverse direction 114 AMSON O Tape auto music sensor control signal output to the CXA2510AQ (IC250) “L” is output to lower the gain for audio level at FF/REW mode 115 DOLBC O Standby on/off control signal output to the power amplifier (IC700) “L”: standby mode, “H”: amp on 116 DOLBY I/O 117 CSV-NAR I “H” is input when CSV (IC650) sends data 118 LEDON O Power supply on/off control signal output of the illumination LED 119 VSS — Ground terminal 120 POWON O Main system power supply on/off control signal output to the BA3918 (IC502) 110 “H”: motor on Mode “H”: tape on Dolby control in/out terminal At initial mode: valid/invalid selection input of dolby function (valid at “L” input) At normal mode: dolby on/off control signal output to the CXA2510AQ (IC250) (dolby on at “H” output) *1 Loading/tape operation motor control STOP LOADING/ FORWARD LM-LOD (pin `⁄⁄‚) “L” LM-EJ (pin `⁄‚·) “L” Terminal “H” active EJECT/ REVERSE BRAKE “H” “L” “H” “L” “H” “H” – 53 – “H”: power on “H”: power on