AIWA CDC-X144 Service Manual - Page 7

CDC-R104/X104/X144 3-3. BLOCK DIAGRAM - MAIN SECTION - J1 (ANTENNA) J601 (AUX IN) TU1 (TUNER UNIT) 1 ANT L4 R3 R-CH R-CH CD SECTION A CD-L (Page 18) R-CH VCC 10 TU VDD 11 E2P VDD 15 AUDIO+8.3V TU+5V BACK UP+3.3V LEVEL METER VOLTAGE DETECT D401,402,Q401 SCL TU-SCL 13 SDA TU-SDA 14 RDS 9 X51 8.664MHz R104 RDS DEMODULATOR IC51 16 MPX 9 XTI SCL 11 SCL SDA 12 SDA 10 XTO INTN 15 VDDA VDDD 1 7 B+ SWITCH BACK UP Q51,52 +3.3V MULTI CONDITION 8 QUALITY 5 S-METER 6 TU MUTE 7 E2P SCL 16 E2P SDA 17 R104 NS MASK SWITCH Q3 SOUND CONTROL, ELECTRONIC VOLUME IC401 5 AUX-LCH 3 AUX-RCH OUT SUB L 17 OUT SUB R 18 9 CD-LCH 8 CD-RCH R-CH 7 TU-LCH 6 TU-RCH OUT-FL 23 OUT-RL 22 OUT-FR 25 OUT-RR 24 15 OUT-SEL-R 16 OUT-SEL-L MUTE 29 SCL 30 SDA 31 R-CH (FRONT) R-CH (REAR) SCL SDA SYSTEM CONTROL IC501 (2/3) I2C CKO 81 SCL 99 L METER I2C SIO 79 SDA VOL ATT 60 ATT 24 BEEP 85 AMPSTB 70 DIAG 59 82 DAVM DSSA 57 ACC IN 21 TEL ATT 23 28 TU ATTIN TEST IN 22 REAR L/R CUT OFF SWITCH Q403 DSSA ON/OFF SWITCH Q402 MUTE Q481 MUTE Q431 MUTE Q451 POWER AMP MULTIPLE VOLTAGE REGULATOR IC750 12 IN-FL 11 IN-RL OUT-FL+ 5 OUT-FL- 3 OUT-RL+ 9 OUT-RL- 7 MUTE DRIVE Q491,492 D492 BATT SDA 2 SDA SCL 4 SCL AMP-REM 29 ANT-REM 27 R-CH J331 L AUDIO OUT R REAR R-CH BATT FU601 CN601 1 FL+ 9 FL- 2 RL+ 10 RL- 4 FR+ 12 3 FR- RR+ 11 RR- 5 6 AMP-REM ANT-REM 16 BATT BATT 16 BEEP 22 STB 25 DIAG 35 VP AUDIO+8.3V 30 B.UP+B 37 SERVO+3.3V 31 MECHA+6V 33 PANEL+B 34 AUDIO+8.3V BACK UP+3.3V SERVO+3.3V MECHA+6V PANEL+10V R104/X104: AEP,UK MODEL ACC CHECK Q631 TEL ATT Q651 7 ACC 13 ATT 15 TEST 92 QUALITY 66 NS MASK 93 VSM 64 TU ATT 67 EEP CKO 68 EEP SIO BUIN 31 BATTERY CHECK Q582 PANEL+3.3V PANEL +3.3V SWITCH Q503 LCD CTL 54 BUS ON 36 SYS RST 37 LOW VOLTAGE DETECT Q581 BACK UP+3.3V TU+5V TU+5V REG Q1 AUDIO+8.3V D580 BATT OVER VOLTAGE DETECT Q580 D581 • R-CH is omitted due to same as L-CH. • Signal Path : CD PLAY : FM : AM/MW/LW : AUX 19 19