Sony STR-DE475 Service Manual - Page 10
Block Diagram – Display - protect
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STR-DE475 3-3. BLOCK DIAGRAM - DISPLAY SECTION - • R-CH is omitted due to same as L-CH. • Signal Path : FM L SL A C SW FL101 FLUORESCENT INDICATOR TUBE FL1 FL2 14 29 42 31 SEG1-16 GRID1-12 STB CLK DIN 789 FL/LED DRIVE IC103 LEVEL LED 2 NAME LED 3 SUR LED 1 SETUP LED 4 D007-010 16 17 18 POWER MUTING Q747,748 +5V D011 D014 LED DRIVE LED DRIVE Q008 Q009 D002 D003 D004 3 4 5 7 6 29 FL LAT FL CLK FL DAT SYSTEM CONTROL IC102(2/2) X0 X1 AD KEY IN1 AD KEY IN2 AD KEY IN3 AD KEY IN4 VOL A VOL B PW KEY IN 82 83 X101 16MHz 38 39 40 41 FUNCTION KEY S100-103 S105-109 FUNCTION KEY S110,112,113 S115-118 S121,122 FUNCTION KEY S111,114,120 S123-129 FUNCTION KEY S104 S131-136 12 56 13 VOL ENCODER RV102 S150 POWER ON/OFF BLU LED DCS LED AFD LED MODE LED 2CH LED AC MUTING PROTECT H/P RY SP A RY REAR RY CTR RY WOOFER RY POWER AMP IC701 +V OUT2 12 8 IN2 NF2 9 -V OUT2 11 LIMITER Q701 LIMITER Q702 BOOSTER Q703 BOOSTER Q704 CURRENT DETECT Q705,706 OVER LOAD DETECT Q708,709 Q707 D706 +V OUT1 2 6 IN1 NF1 5 13 VCC 14 VCC -V OUT1 3 POWER AMP IC501 +V OUT 6 1 IN+ IN- 2 9 +B -V OUT 5 LIMITER Q651 LIMITER Q652 LIMITER Q501 LIMITER Q502 BOOSTER Q653 BOOSTER Q654 BOOSTER Q503 BOOSTER Q504 CURRENT DETECT Q655,656 CURRENT DETECT Q505,506 D721 OVER LOAD DETECT Q657,658 Q659 D606 D506 OVER LOAD DETECT Q507,509 IC401(2/2) 5 7 PROTECT SWITCH Q722,723,725 D731 D735 D734 D736 RELAY DRIVE Q791 RY791 RELAY DRIVE Q730 RY730 R-CH J791 PHONES R-CH TM602 L R SPEAKERS FRONT RELAY DRIVE Q610 RY601 R-CH TM601 SR SL C SPEAKERS SURROUND SPEAKERS CENTER RELAY DRIVE Q550 RY550 RELAY DRIVE Q560 RY560 J253 SUB WOOFER AUDIO OUT 58 15 10 14 12 13 55 HP SW SIRCS 57 IC101 REMOTE 1 CONTROL 2 RECEIVER D109 VCC 23 VCC 84 RESET 77 HSTX 52 STOP 47 8 D101 B RESET D110 RESET Q100,101 POWER RY POWER AMP -B FL201 -30V TUNER +12V RELAY +B AUDIO +5V TUNER,RDS VIDEO +5V LED +5V AUDIO +7V AUDIO -7V -B SW Q691 -30V REG Q801 IC806 3 +12V REG 1 POWER AMP +B D898 D802 D820-823 T901 E MODEL 240V 220V 120V 0V EXCEPT E MODEL IC807 3 +5V REG 1 IC803 3 +5V REG 1 IC804 3 +5V REG 1 IC801 3 +7V REG 1 IC802 3 -7V REG 2 D824-827 VIDEO +9.2V VIDEO -12V FL1 FL2 +5.6V REG Q951 3 POWER 8 CONTROL 5 IC950 6 D910-913 D914 T902 D915 RELAY DRIVE Q901 RY901 E MODEL VOLTAGE SELECTOR S901 AC IN 10 10
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