Sony STR-K790 Service Manual - Page 15

4-2. BLOCK DIAGRAM - DISPLAY/POWER SECTION - STR-K790 • R-CH is omitted due to same as L-CH. • Signal Path : FM L IC501 POWER AMP +V OUT2 12 8 IN2 NF2 9 Q501,502 LIMITER Q503 BOOSTER -V OUT2 11 IC601 POWER AMP +V OUT2 12 Q504 BOOSTER Q601,602 LIMITER Q603 BOOSTER Q505,506 CURRENT DETECT SL 8 IN2 NF2 9 A MAIN SECTION (Page 14) C -V OUT2 11 POWER AMP IC701 +V OUT2 12 8 IN2 NF2 9 Q701,702 LIMITER Q604 BOOSTER Q703 BOOSTER Q605,606 CURRENT DETECT -V OUT2 11 Q704 BOOSTER Q705,706 CURRENT DETECT +V OUT1 2 Q751,752 LIMITER Q753 BOOSTER SW 6 IN1 NF1 5 -V OUT1 3 Q754 BOOSTER Q755,756 CURRENT DETECT R-CH R-CH R-CH SR-CH SR-CH R-CH Q507 AF POWER PROTECT Q607 AF POWER PROTECT SR-CH Q707 AF POWER PROTECT Q608 RELAY DRIVE RY551 R-CH TM602(1/2) L R FRONT RY601 R-CH TM604(1/2) L R SURROUND Q708 RELAY DRIVE RY701 SPEAKERS IMPEDANCE USE 6-16Ω TM602(2/2) CENTER TM604(2/2) SUB WOOFER IC850 2 PROTECT DET 7 POWER AMP -B +B -B FL101 -20V TUNER +10V RELAY +B AUDIO +7V AUDIO +5V AUDIO -7V Q851,852 -B SWITCH D811 Q801 -20V REG IC1902 3 +10V REG 1 IC821 1 +7V REG 3 IC1001 3 +5V REG 1 IC822 3 -7V REG 2 R803 D920-923 AEP,UK HDMI +3.3V IC5003 3 +3.3V REG 1 T901 B MAIN SECTION (Page 15) AUTO CAL MIC IC2000 5 AMP 1 Q2001,2002 DC +7V CONTROL 68 38 Q881-883 PROTECT SWITCH D841 VACS CONTROL 61 45 PROTECTOR VAX CTRL DC-CONTROL ADCC X1101 24MHz IC102 REMOTE CONTROL 1 RECEIVER 82 X0 83 X1 54 SIRCS SYSTEM CONTROL IC1101(2/2) FL_LAT FL_CLK FL_DATA 9 16 17 IC101 BUFFER IC100 FL DRIVE SEG1-17 14 7 DIN 29 8 CLK 31 9 STB 42 GRID1-11 32 FL101 FLUORESCENT F1 INDICATOR TUBE F2 D1111 D1110 D1107 Q509 RELAY DRIVE RY502 R-CH J790 PHONES 62 66 69 55 C/REAR/SB_RY FRONT_A_RY/DG51_FB HP_RY A/D1 39 40 64 65 FUNCTION KEY S114-119 FUNCTION KEY S103,104 32 ENCODER RV102 MASTER VOLUME A/D2 VOL_ENCODER(B) VOL_ENCODER(A) ENC_B ENC_A POWER_KEY HP_DETECT HDMI_CTRL 89 FUSE DETECT 63 AVRH 36 AVCC 35 VCC3 84 VCC5 23 RSTX 77 STOP 48 32 31 POWER_RY 58 56 32 ENCODER RV101 INPUT SELECTOR S152 ?/1 HDMI +5.8V +5V +3.3V +2.5V +3.3V (STBY) IC1111 1 RESET 2 IC5006 4 +5.8V REG 2 1 IC1031 3 +5V REG 1 IC1901 2 +3.3V REG 4 5 +2.5V REG D804-807 F1 F2 D1001 IC1904 3 +3.3V REG 1 D910-913 F901 AC IN Q911 AC DET D914 D915 T900(AEP,UK) T902(US,CND) Q901 RELAY DRIVE RY901 STR-K790 15 15