Sony STR-K1600 Service Manual - Page 41

• IC Block Diagrams IC401 BD3451KS (MAIN BOARD (1/2)) STR-K1600 Ver. 1.1 INCC INCSL INCSR INCSBL INCSBR INCSW AGND7 DGND CLK DATA AGND8 PORTA PORTB AGND9 AGND10 VCC AGND11 VEE AGND12 GOUTSW VINSW AGND13 GOUTSBR VINSBR AGND14 GOUTSBL VINSBL AGND15 GOUTSR VINSR INCR 50 INCL 49 AGND6 48 ROUTBR 47 ROUTBL 46 ROUTAR 45 ROUTAL 43 AGND5 42 AOUTR 41 AOUTL 40 AGND4 39 INIR 38 INIL 37 INHR 36 INHL 35 INGR 34 INGL 33 INFR 32 INFL 31 INER 30 2CH INPUT SELECTOR MASTER VOLUME CONTROL OUTPUT GAIN CONTROL 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 8CH INPUT 3 LOGIC INPUT GAIN SW SBR SBL SR SL C R L 2CH INPUT SELECTOR 8CH INPUT 2 8CH INPUT 1 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 81 OUTSW 82 OUTSBR 83 OUTSBL 84 OUTSR 85 OUTSL 86 OUTC 87 OUTR 88 OUTL 89 AGND16 90 VINL 91 GOUTL 92 AGND17 93 VINR 94 GOUTR 95 AGND18 96 VINC 97 GOUTC 98 AGND19 99 VINSL 100 GOUTSL INEL INDR INDL INCR INCL INBR INBL INAR INAL AGND3 BOUT2 BOUT1 AGND2 INBSW INBSBR INBSBL INBSR INBSL INBC INBR INBL AGND1 INASW INASBR INASBL INASR INASL INAC INAR INAL IC501 µPC2581V-S (MAIN BOARD (2/2)) IC601 µPC2581V-S (MAIN BOARD (2/2)) IC701 µPC2581V-S (MAIN BOARD (2/2)) PROTECTOR BIAS CIRCUIT REG DRIVE PRE DRIVE PRE DRIVE DRIVE 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 MUTE +VOUT1 -VOUT1 COMP1 NF1 IN1 GND IN2 NF2 COMP2 -VOUT2 +VOUT2 VCC VCC VEE 41