Service manual

V12_ON
PWM2
NCAMPFB
PWM1
VPWM
PNLPWRP{9}
BKLTPWRP{9}
PWMP{9}
V12_ONP{18}
V12_ONP{18}
V18
VCC V25
VCC V33VCC
VCC
PANELVCC
VCC
V12
Vsub VCC
V12IN V12
V12
V12
V12IN
VCC
Vsub
Vsub
V15P
PW328 and PW2030
PW20300
V25
V18
BULK SUPPLIES
V15P
V33
PW328
For 32" Samsung Auo Panel
For 37" LG Panel
For 37" Power
For 32" Power
V12
INVERTERON/OFF
BACK LIGHT ADJ
POWER ON/OFF
PANELVCC ON/OFF
VCC ON/OFF
Q21
AP4435M
S1
1
S1
2
S1
3
G1
4
D1
8
D1
7
D1
6
D1
5
D31
B340A
A K
L118 PBY32-190
R337 561
R343
10K
R330 330
D32
B340A
A K
R332
10K
U46
AT1796-ADJ
VI
1
GND
3
VO
2
TAB
6
ON
5
FBK
4
C501
470U
12
J11
BACKLIGHT
1
2
3
4
5
6
7
8
9
10
11
12
13
R322
510
C493
10U_NC
12
C494
470U
12
R329 1KR327 1K
C505
333
R324
10K
C509
470U
12
R323 4.7K
L119 PBY20-221
D34
B340A
A K
C492
.1
C508
470U
12
U44
AT1796-ADJ
VI
1
GND
3
VO
2
TAB
6
ON
5
FBK
4
Q24
3904
CE
B
R334
10K C502
100U
12
U43
AT1796-ADJ
VI
1
GND
3
VO
2
TAB
6
ON
5
FBK
4
+
-
U42B
LM358
5
6
7
84
R321
10K
Q23
AP4435M
S1
1
S1
2
S1
3
G1
4
D1
8
D1
7
D1
6
D1
5
C503
.1
C497
333
C491
.1
U45
AT1796-ADJ
VI
1
GND
3
VO
2
TAB
6
ON
5
FBK
4
R335
10K
D33
B340A
A K
+
-
U42A
LM358
3
2
1
84
C506
470U
12
C507
470U
12
L123 PBY32-190
R331 10K
C496
333
C510
470U
12
R317 4.7K_NC
C500
470U
12
R320 47K
C489
.1
C490
.1
Q22
3904
CE
B
C495
.1
R339 4.7K
R342
10K
C511
10U_NC
12
C488
10U
12
R333
10K
Q19
2N7002
D
G
S
R318 0_NC
R340
10K
R336 1K
R319
0
R341
10K
R326
10K
Q20
3904
CE
B
C504
333
L120 PBY20-221
L125 25uH
R325 10K
R328 1K
C498
470U
12
R338 2.7K
C499
470U
12
L121 25uH
L124 25uH
L122 25uH
9. Schematic Diagrams
ViewSonic Corporation Confidential - Do Not Copy N4261w-1M
31
9.1 POWER/SWITCHES