Kenwood VR 3080 Service Manual - Page 5

KRF-V7772D/VR-3080 BLOCK DIAGRAM 5 (SIGNAL STAGE) (X09) (ANALOG) PHONO PHONO 2.5mV/ 4.7K IN IC4 EQ IC1 L2,R2 (X05) TUNER OTHER IN 200mV/47K OUT 200mV/2.2K MD/TAPE1 CD2/TAPE2 MONITOR CD1 PLAY IN VIDEO1 VIDEO2 VIDEO3 VIDEO4 L1,R1 L7,R7 L4,R4 L6,R6 L5,R5 IC5 L5,R5 L6,R6 L7,R7 L8,R8 (X08) AV AUX IN (FRONT) L4,R4 (X08) L8,R8 LINE BUFFER IC3 BUFFER INPUT ATT IC1 Q1,2 Q3,4 TONE OFF IC15 L5,R5 IC41 -3dB ATT -6dB ATT L3,R3 L3,R3 CONFIG-2 FILLTER IC12,13 L6,R6 IC42 TONE DIGITAL IC3 DIR DAC A/C CONVERTER CS4226 IC56,57 X51 IC51 DSP IC52 SRAM FL,FR IC11 21kHz LPF IC21 21kHz LPF LS,RS, IC31(1/2) 21kHz LPF CENTER IC31(2/2) 21kHz LPF SUB L7,R7 L1,R1 L2,R2 IC32 (1/2) -6dB ATT R141 -144 L8,R8 L4,R4 IC32 (2/2) MD/TAPE1 REC OUT TAPE2 VIDEO1 L1,R1 REC OUT BUFFER L2,R2 IC2 L3,R3 (X08) A1 OPTICAL IN VIDEO2 A2 VIDEO3 COAXIAL IN J1 VIDEO4 J2 CD1 (S1-VIDEO) 1Vp-p/75 VIDEO 1 IC65,66 BA7626F Y C Y VIDEO 2 C Y PLAY VIDEO 3 C Y VIDEO 4 C IC6 (VISUAL) 1Vp-p/75 VIDEO 1 COMP VIDEO PLAY VIDEO 2 VIDEO 3 VIDEO 4 COMP VIDEO REC (FRONT) AV AUX VIDEO 1 IC61 BA7626F Q611,612 (FRONT) AV AUX REC VIDEO 1 MONITOR OUT Y C Q641 Y C Q651,652 Q655 Y V-MUTE C Q643 Q653, 654 Q642 MONITOR OUT (OSD) Q623 Q621,622 V-MUTE EACH INPUT C-TERMMNAL (J TYPE) IC67 S1 DETECTOR u-COM IC16 VOLUME Q151,152 -20dB ATT AMP IC17 IC26 VOLUME Q251,252 IC27 -20dB ATT IC36(1/2) VOLUME IC36(2/2) VOLUME Q351 -20dB ATT Q352 -20dB ATT IC37 (1/2) IC37 (2/2) -20dB ATT A-MUTE RELAY A RELAY B RELAY CS A-MUTE S-MUTE SW-MUTE (X09) Q11,12 MUTE Q13,14 MUTE Q15 MUTE POWER AMPLIFIER K2 K3 POWER AMPLIFIER K4 POWER AMPLIFIER K5 Q153-156 MUTE Q253-256 MUTE Q353,355 MUTE Q354,356 MUTE (u-COM STAGE) (X08) TUNER 8 AUDIO SEL. 3 DPS 10 DIR DAC,ADC 9 TONE.VOL. 3 20dB ATT A MUTE S MUTE SW MUTE SP.RELAY 3 V MUTE PROTECTION S1 DETECTOR 6 (J TYPE) IC71 DO DI IC91 CK ST RST FL MI-COM SYSTEM u-COM IC72 X8 REMOTE CONTROL MI-COM Q851,852, 856,857 38kHz FILTER Q853-855 455kHz FILTER RX TX DATA, BUSY LEDx7 ED1 51 FL A91 REMOTE CONTROL J85 IR REPEATER OUT J84 IR RECIEVER IN J83 IR RECIEVER OUT D571-574 IR LED REMOTE OUT J82 SL16 TEXT J81 SYSTEM CONTROL (X09) PHONES K,Y,M,X 1.3Vrms/32 J 1.1Vrms/32 5ch SP. OUTPUT K,Y,M,X 24.5V/6 J 20.0V/4 PHONES FRONT A L,R FRONT B L,R LS,RS SPEAKERS C Q100 SE-RLY RELAY T1 DRIVER to u-COM +5.7V GND FINAL TR. GND to POWER FINAL TR. PRE DRIVE GND PRE DRIVE to FL u-COM -35V to SELECTOR VOLUME TONE TUNER PRE AMP +17V GND -17V IC8 AVR D17-20 + D2 + + D1 K6 Q7 AVR D10 Q1 AVR + Q2 + AVR D3-6 FRONT L,R LS,RS C PRE OUT 1.0V/1K (X08) to DSP +3.3V to CODEC +5.0V SRAM to VIDEO SELECTOR +5.7V GND IC54 AVR IC5 AVR IC62 AVR Q16 AVR + D13-16 FIL SW FIL D9 D30 POWER-RLY STROKE SW S1 K1 Q8 RELAY DRIVER AC OUTLET VR-3080 KRF-V7772D