Power Section - Sony STR-DE875 Service Manual

– DISPLAY/POWER SECTION –
L
• R-CH is omitted due to same as L-CH
• Signal Path
: FM
: CD/SACD
: DVD/LD (DIGITAL)
SL SL
A
C
D101-117
FL101
SW
FLUORESCENT
INDICATOR TUBE
FL1 FL2
2 23 1,70 37 22 30 ,10,9, 7 1
G1-22 P1-35
IC102
IC101
LED DRIVER
FL DRIVER
28 30 31 32 16 17 18 19
IC1161 IC1151
11 8 3 6 3 6 8 11
12 13 9 10 2 1 5 4
2 1 5 4 10 9 12 13
+5V (STBY)
2ND_DATA
2ND_CLK
D
112 111 113 114 4 3 6 5 119
132 133 134 135
58 57
X1101
16.5MHz
FUNCTION FUNCTION FUNCTION FUNCTION
KEY KEY KEY KEY
S101-107 S111-117 S121-127 S131-136
S118
DE975
IC551
POWER AMP
Q423
+V OUT2 12
BOOSTER
Q421
LIMITER
8
IN2 NF2 9
Q427
Q422
AF POWER
LIMITER
PROTECT
Q425,426
Q424
-V OUT2 11 CURRENT
BOOSTER
DETECT
Q523
+V OUT1 2
BOOSTER
Q521
LIMITER
6 IN1 NF1 5
Q522 Q527
1 MUTING AF POWER
LIMITER
PROTECT
Q524 Q525,526
-V OUT1 3 CURRENT
BOOSTER
DETECT
IC601
POWER AMP
Q623
+V OUT 6
BOOSTER
Q621
LIMITER
1 IN+ IN- 2
Q627
Q622
AF POWER
LIMITER
PROTECT
Q625,626
Q624
-V OUT 5 CURRENT
BOOSTER
DETECT
D752
Q751-753
PROTECT
SWITCH
IC304
3 1
Q721,722
POWER
MUTING
IC1131
EEPROM
5 6
20 15 16 18 17 19 99 100
IC1101(3/3)
SYSTEM CONTROLLER
136
8 7 11 10 12 13 62 14
3 1 3 1 3 1
S161 S151
FUNCTION
ENCODER ENCODER ENCODER
KEY
SPEAKERS
S141-146 RV103 RV102 RV101
S147
(CURSOR) FUNCTION MASTER VOLUME
DE975
RY701 R-CH
Q701
RELAY
DRIVER
TM501
L
RY401
D432 Q431
RELAY R-CH R
DRIVER
TM601
R-CH SR
SL
RY501
D532
Q531
RELAY C
DRIVER
RY601
D632 Q631
RELAY
DRIVER
J306
RY681
Q681
RELAY
DRIVER
IC305
2 1 5 7
C
SIRCS OUT
21
IC103
REMOTE
Q1106
SIRCS 66 1 CONTROL 2
BUFFER
RECEIVER
+5V (STBY)
IC1021
+3.3V
+3.3V (STBY) 3 1
REG
(IC1101) IC1111
RSTX 55 1 RESET 2
VOLT_DETEC_STOP 60
22 41
B
RESET
11 11
J701
PHONES
FRONT
SPEAKERS
SURROUND
CENTER
IC1041
+3.3V
+3.3V 3 1
REG
D851-854
IC1051 IC1031
+2.5V +5V
+2.5V 3 1 3 1
AUDIO SUB
REG REG
WOOFER
OUT
IC1011 PIN1
S801
IMPEDANCE
SELECTOR
FRONT
8Ω 4Ω
D801
+B
-B
POWER AMP
Q723,724
-B
-B SW
D804 D805
FL101 Q801
+30V
+30V REG
D861-864
RELAY
+B
IC811
ANALOG
+7V
1 3
+7V REG
Q821
+3.3V
D871
(IC303) +3.3V REG
IC812
IC1071 ANALOG -7V
3 2 D872
-7V
REG
TUNER +3.3V
3 1
+3.3V
REG
IC814
IC1001 VIDEO +5V
3 1
+5V REG
ANALOG
+5V
3 1
+5V REG
IC815
VIDEO
-5V
3 2
-5V REG
IC1061
TUNER +12V
3 1
+12V REG
IC1011
D927
Q912,913
+5V
3 1
REG
+B SW
D921-924
Q921
VOLTAGE
DET
D925
Q911
RELAY
DRIVER
STR-DE875/DE975
T901
D875:E
S901
240V
VOLTAGE
220V
SELECTOR
120V
F904
0V
FL1
FL2
J911
F901
AC
OUTLET
F902
T902
JW809
AC
IN
D926
RY911