Kenwood VR 3080 Service Manual - Page 19

U V W (X08-297X-XX) (A/10) +17V 17V X Y +17V 17V Z AA AB AC AD +17V 17V +17V 17V R772 10K 65 65 67 66 VDD R755 47K C706 0.01 R754 10K C705 0.01 R753 10K R744 3.3K 79 R745 3.3K 80 R743 10K 96 VDD 77 76 75 74 73 72 71 70 R742 3.3K R741 3.3K R739 3.3K R738 3.3K R737 3.3K R740 47K 73 74 75 R733 220 R732 220 68 R736 220 67 R735 220 66 69 4.9V 0V 0V 0V 0V 4.8V 0V 0V 4.2V 4.9V 4.9V 4.7V 0V 66 SI 65 SO 67 SCK 20dB 80 79 AMUTE SW 78 SYNC BUSY 77 SYNC DATA SYNC 8/16 76 FL CK 75 74 FL DI 73 FL DO 72 FL ST 71 FL RST DSP IC 70 69 TEXT TX 68 TEXT RX R746 3.3K 81 R776 3.3K 82a R747 3.3K 82 R748 1K 83 R749 1K 84 R750 470 85 R751 1K 86 R752 1K 87 R796 1K 88 0V 81 AMUTE S 0V 82 4.7V 83 0V 84 0V 85 4.8V 86 4.7V 87 0V 88 AMUTE MAIN RELAY SPA RELAY SPB RELAY SPC&S RELAY POWER RELAY SECOND PROTECTION I R797 1K 89 0V 89 PROTECTION V 91 92 93 94 95 97 98 99 0V 90 Ir RECEIVER ON/OFF D705 0V 91 SEL CK D706 0V 92 SEL DA D707 0V 93 SEL ST1 R788 3.3K 0V 94 ATT3 R789 3.3K 4.9V 95 ATT6 R777 470 0V 96 TAPE2 LED R757 100 5.1V 97 IR RWR R758 100 0V 98 IR REN R759 100 0V 99 IR REQ 100 VSS R774 1M X72 3.64MHz REMOTE IC72 u-COM 99 97 98 1 1 2 2 3 REQ 4 RER 5 REN 6 6 7 7 28 28 27 27 26 26 25 25 24 24 23 23 22 D7 0V R767 100 8 R756 0V 8 REMO 21 D6 0V R766 100 7 100 5.1V 9 VDD 20 0V R765 100 D5 6 2.5V 10 XOUT 19 D4 0V R764 100 5 C712 2.3V 11 XIN 18 0V R763 100 D3 4 0.01 12 17 0V R762 100 GND D2 3 5.1V 13 RST 16 D1 0V R761 100 2 14 15 0V R760 100 WDO D0 1 VDD C708 0.1 VDD D708 VDD 1 2 3 4 5 6 7 8 VDD 0V 0V 0V 0V 0V 0V 0V 0V 4.9V 1 IR D0 2 IR D1 3 IR D2 4 IR D3 5 IR D4 6 IR D5 7 IR D6 8 IR D7 9 VDD IC71 SYSTEM u-COM C714 100P C713 100P R708 47K R705 10K R706 47K R701 10K R702 47K R769 10K R771 10K R703 10K R704 47K R773 12 100 VDD VDD CODEC DSP R768 3.3K 14 R770 3.3K 15 R709 47K R811 3.3K 17 R812 3.3K 18 R813 3.3K 19 R814 470 20 R816 3.3K 21 0V 0V 0.5V 0V 0V 0V 0V 4.9V 0V 0V 4.2V 0V 10 TSW3 11 TSW2 12 TSW1 13 TSW0 14 RENC A 15 RENC B 16 NO USE 17 T MUTE 18 T CK 19 T DA 20 T D0 21 T CE 64 AVREF1 63 DSP CSB 62 DSP CSA 61 AVSS 60 DSP SURRENC 59 DSP NONPCH 58 CODEC AUDIO 57 NO USE 56 NO USE 55 CODEC FREQ0 54 CODEC FREQ1 DATA DET. 53 4.8V 0V 0V 5.1V 4.9V 4.5V 0V 0V 0V 0V 4.6V 0V R730 220 R729 220 AVREF 63 62 VDD VDD VDD VDD +5.8V VDD +5.8V +13.7V VDD VDD +5.8V 60 59 58 55 54 53 R722 47K R723 47K R724 47K R725 47K R726 47K R727 47K R728 47K 4.9V VDD C709 100P C710 100P R873 100K R718 47K R719 47K R720 47K R721 47K 52 AVREFO 51 AVDD 50 DSP AC3 49 DSP DTS 48 CODEC AC3 CODEC ERR/OVR 47 CODEC CS 46 45 REM1 44 REM0 43 RESET 0V 0V 0V 4.4V 4.9V 0V 5.0V 5.0V 42 XT1 41 XT2 40 VSS X1 39 X2 38 37 VDD 36 CE VOL. CK 35 VOL. DA 34 33 VOL. ST 32 TONE ST 31 V MUTE 2.3V 2.6V 4.9V 5.1V 0V 0V 0V 0V 0V R717 3.3K 50 49 48 47 46 C703 1 X71 12.5MHz C711 R716 4700P 1M VDD D704 35 D703 34 D702 33 D701 32 C704 100P VDD VDD R858 1K 68 R857 330 R853 330 D855 R855 100K 77 R856 100K 76 R854 330 D856 R851 100K R852 100K D854 D853 69 68 R859 100K R860 100K D858 77 76 D857 69 VDD 78 +5.8V +5.8V 44 VDD VDD R807 10K +5.8V 22 VPP 5.1V 23 T SD 5.1V 24 T STEREO 5.6V 25 S1 V1 5.6V 26 S1 V2 5.6V 27 S1 V3 5.6V 28 S1 V4 5.5V 29 S1 AUX 4.9V 30 S1 OUT R715 3.3K R815 47K R817 3.3K R819 3.3K R714 33K R713 33K R712 33K R711 33K R710 33K R820 33K R818 33K R775 3.3K 23 24 25 26 27 28 29 30 VDD VDD VDD 31 VDD VDD VDD VDD C804 100u10 C803 R806 0.047F5.5 1K BACK UP CON. R808 4.7 1/4W R805 10K + + D801 +5.8V D802 VDD 5.0V RESET R804 0V 1K Q801 R802 10K VDD C802 1u50 + 5.1V RESET IC IC81 5.1V OUT IN GND D803 R803 100K VDD R801 820 R800 1K C801 0.01 L84 L83 +13.7V C851 220P C852 220P Q853 C866 0.1 77 76 78 J81 BUSY DATA GND D851 D852 S1 C853 0.1 +5.8V +13.7V 68 69 REPEATER OUTPUT AMP +13.7V AMP 13.4V 0V 0V R876 2.7K 13.4V R878 100 0V Q856 R880 22K 13.4V Q857 R881 470 1/4W R882 470 1/4W R879 1K +13.7V R883 1K R877 12K +13.7V IR INPUT 13.4V AMP 4.8V D860 Q851 R862 1K 0V 0V Q852 L81 100uH R861 47K C861 100P C863 100P C864 100P C854 220P C855 220P J82 RX TX J85 C865 0.01 J84 R865 470 1/4W J83 D804 R864 10K R863 1K VDD C856 0.082 5.3V 0V R867 1K Q853 0V VDD IR INPUT AMP D861 0V L82 100uH Q854 R869 4.7K 5.3V R870 Q855 10K C858 0V 330P R872 C862 5.3V 100 100P SL16 XS8 SYSTEM CONTROL SL16 TEXT IR REPEATER OUT IR RECEIVER IN DC12V 15mA IR OUT LCD REMOTE A R866 22K R868 1K C857 1000P R871 1K VDD TEST PIN 5 CLK 75 4 SCK 73 3 SO 74 2 SI 1 GND VDD 1 RST 2 VDD 3 VPP