Read Sony HCD-DR8AV / HCD-W900AV Service Manual online
HCD-DR8AV/W900AV
— 31 —
— 32 —
POWER SECTION (W900AV model)
F-RELAY
L-CH IN
EVER +5V
MIX MIC
MIC VOLUME
RV850
MIC AMP
IC850 (1/2)
MIC AMP
IC850 (2/2)
STK-POWER
15
12
16
THERMAL
SENSOR
5 6
VOLUME
CONTROL
22
POWER AMP & VOLUME CONTROL
IC801
VOLUME
CONTROL
D802, 852
OVERHEAT
DET
Q831,832
MUTE
SWITCH
Q803,804
SWITCH
Q833
HP-MUTE
PROTECT
16
D804
MIC-SIG
J803
TM401
PHONES
L
R
FRONT
RELAY
DRIVER
Q401-402
R-CH
RY401
–35V REG
Q903,904
VF (–35V)
+VH
-VH
-VH
VF
VF
RECT
D833-836
+UNREG. 12V
UN +10V
UN –10V
VF
VF
RECT
D841-844
+VL
-VL
RECT
D832
D832
RECT
D831
D831
POWER
TRANSFORMER
T951
AC
IN
MAIN 1
SECTION
G
(Page 26)
MAIN 2
SECTION
I
(Page 27)
MAIN 2
SECTION
P
(Page 27)
MIC-SIG
HP.SW
DBFB
DISPLAY
SECTION
K
(Page 33)
MAIN 1
SECTION
C
(Page 25)
MAIN 2
SECTION
H
(Page 27)
MAIN 1
SECTION
O
(Page 26)
J801
MAIN 1
SECTION
E
(Page 26)
MAIN 2
SECTION
L
(Page 28)
• SIGNAL PATH
: FM
: FM
• R CH : Same as L ch
MUTE
SWITCH
Q103,104
L
R
CENTER
SURROUND
REAR
RELAY
DRIVER
Q403, 407
PROTECT
BUFFER
Q439
R-CH
RY402
PROTECT
DRIVER
Q437
RELAY
SWITCH
Q431
HEADPHONE
MUTE
Q805
TM402
REAR-L
CENTER
PL-RELAY
MAIN 2
SECTION
N
(Page 29)
MAIN 1
SECTION
M
(Page 26)
PROTECT
DC DET
Q433,434
PROTECT
DET
Q432
DBFB
DET
D803
R-CH
R-CH
SURROUND AMP
IC101
12
14
16
8
9
R-CH
OVERLOAD
DET
Q801
OVERLOAD
DET
Q101
OVERLOAD
DET
Q151
7
THERMAL
SENSOR
OVERHEAT
DET
Q131,132
PRE
-VCC
Q834
SWITCH
SWITCH
-VH
CCC
F961
F963
F964
F962
RECT
D907-910
VF
D912
SUB-TRANSFORMER
T901
RECT
D902-905
+5.6V REG
IC901
POWER SWITCH
Q902
+5.6V
VG
1
SWITCH
Q907
–30V REG
Q903
SWITCH
Q904,905
SWITCH
Q906
RELAY
SWITCH
Q901
STANDBY
RELAY
RY901
RY901
POWER
ECO
3
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