Read Sony STR-DE875 / STR-DE975 Service Manual online
11
11
STR-DE875/DE975
– DISPLAY/POWER SECTION –
• Signal Path
• R-CH is omitted due to same as L-CH
: FM
: CD/SACD
: DVD/LD (DIGITAL)
RESET
IN2
8
12
+V OUT2
POWER AMP
IC551
9
NF2
LIMITER
Q421
11
-V OUT2
LIMITER
Q422
BOOSTER
Q423
BOOSTER
Q424
CURRENT
DETECT
Q425,426
AF POWER
PROTECT
Q427
IN1
6
2
+V OUT1
5
NF1
LIMITER
Q521
3
-V OUT1
LIMITER
Q522
BOOSTER
Q523
BOOSTER
Q524
CURRENT
DETECT
Q525,526
IN+
1
6
+V OUT
POWER AMP
IC601
2
IN-
LIMITER
Q621
5
-V OUT
LIMITER
Q622
BOOSTER
Q623
BOOSTER
Q624
CURRENT
DETECT
Q625,626
D752
PROTECT
SWITCH
Q751-753
RELAY
DRIVER
Q701
RY701
RELAY
DRIVER
Q431
RY401
D432
RELAY
DRIVER
Q531
RY501
D532
RELAY
DRIVER
Q631
RY601
D632
3
1
RELAY
DRIVER
Q681
RY681
L
R
SR
SL
C
R-CH
R-CH
R-CH
PHONES
TM601
TM501
AUDIO
OUT
J306
20
PROTECTOR
15
HP_RY
16
SP_A_RY
18
REAR_RY
17
CENTER_RY
19
WOOFER_RY
RV102
ENCODER
3
1
FUNCTION_JOG_1B
11
FUNCTION_JOG_1A
10
RV101
ENCODER
3
1
VOL_JOG_2B
12
VOL_JOG_2A
13
PW_ON/OFF
62
S161
SPK_SEL
14
S151
55
RSTX
60
VOLT_DETEC_STOP
66
SIRCS
REMOTE
CONTROL
RECEIVER
2
1
IC103
+5V
REG
D921-924
AC
IN
T902
RY911
D926
D927
D925
RELAY
DRIVER
Q911
Q921
VOLTAGE
DET
D861-864
-5V
REG
3
2
+5V
REG
3
1
-7V
REG
3
2
+7V
REG
1
3
ANALOG
+7V
VIDEO
+5V
VIDEO
-5V
IC811
IC812
IC814
IC815
PW_RY
22
SUB-T
41
RELAY
+B
D851-854
240V
220V
120V
0V
VOLTAGE
SELECTOR
D875:E
S901
58
57
X0
X1
X1101
16.5MHz
FL1
FL2
L
SL
SL
C
SW
A
MUTING
1
POWER
MUTING
Q721,722
119
AC MUTE
J701
FLUORESCENT
INDICATOR TUBE
FL101
112
FL DIN/F1
111
FL CLK
113
FL LAT/F2
114
FL DRV.CLR
28
DIN
30
CLK
31
LAT
32
CL
2 23
G1-22
1,70 37
P1-35
16
DATA
17
CLK
18
STB
19
CLR
22
1
FL1
FL2
4
2ND_DATA
3
2ND_CLK
6
LED_DRV_CE
FUNCTION
KEY
AD1
132
S111-117
S101-107
FUNCTION
KEY
AD2
133
FUNCTION
KEY
AD3
134
S121-127
S118
FUNCTION
KEY
AD4
135
S131-136
FUNCTION
KEY
AD5
136
S141-146
B
C
D
RESET
SYSTEM CONTROLLER
IC1101(3/3)
AF POWER
PROTECT
Q527
AF POWER
PROTECT
Q627
2
1
FRONT
SURROUND
CENTER
5
7
21
HP_CTRL
D101-117
5
LED_DRV_CL
DE975
S147
DE975
RV103
ENCODER
3
1
CURSOR_JOG_3B
8
CURSOR_JOG_3A
7
BUFFER
Q1106
+3.3V
REG
3
1
2
1
IC1021
ANALOG
-7V
D871
D872
+12V
REG
3
1
3
1
TUNER
+12V
IC1061
T901
+3.3V REG
Q821
+3.3V
REG
3
1
IC1071
TUNER
+3.3V
+3.3V
(IC303)
F901
JW809
F902
AC
OUTLET
J911
F904
D801
4
Ω
8
Ω
IMPEDANCE
SELECTOR
S801
D805
D804
+B
-B
-B SW
Q723,724
+30V REG
Q801
+B SW
Q912,913
FL101
+30V
POWER AMP
-B
+5V
REG
3
1
IC1031
+2.5V
REG
3
1
IC1051
+2.5V
IC1011 PIN1
+3.3V
REG
3
1
IC1041
+3.3V
+5V
REG
3
1
IC1001
ANALOG
+5V
+5V (STBY)
SPEAKERS
SUB
WOOFER
IC1011
IC1111
+3.3V (STBY)
(IC1101)
SIRCS OUT
3
3
1
2
1
2
6
6
4
5
4
5
8
8
9
9
10
10
11
11
12
12
13
13
+5V (STBY)
30 ,10,9, 7
IC101
FL DRIVER
IC102
LED DRIVER
5
SDA
6
99
100
SCL
EEPROM.SDA
EEPROM.SCL
IC1131
EEPROM
(CURSOR)
FUNCTION
MASTER VOLUME
SPEAKERS
2ND_DATA
2ND_CLK
IC305
IC304
IC1151
IC1161
FRONT
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