![background image](http://html1.mh-extra.com/html/viewsonic/va502mb-1/va502mb-1_service-manual_1020920050.webp)
DIM
TP1
HVO
1
L201
L
D205
1N4148
CN202
CONN
1
2
Q201
DTC144WKA
R220
15K
Ω
PT201
POWER X'FMR
5
9
3,4
6
7
1
2
NO/OFF
R216
220
Ω
1/16W
C211
1uF/25V
D209
1N4148
R214
2.2K
Ω
1/16W
D201
SR24
R236
470
Ω
1/16W
+12V
C216
22pF/6KV
C204
0.1uF
U201
BAF9741F
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
CT
RT
1I
N
+
1I
N
-
1FB
K
1D
TC
1OU
T
GND
V
cc
2OU
T
2D
TC
2FB
K
2I
N
-
2I
N
+
SCP
REF
R219
1K
Ω
1/16W
D203
RLZ11B
R238
12K
Ω
1/16W
Q209
2SC5706
1
2
3
is signal GND
C213
.15uF/160V
TP4
HVL
1
TP3
HVL
1
R212
3.9K
Ω
1/16W
Q202
DTA144WKA
C221
0.47uF/25V
C215
22pF/6KV
D207
1N4148
R240
51K
Ω
1/16W
Q210
2SC5706
1
2
3
R205
47K
Ω
R204
10K
Ω
1/16W
Q205
MPS3904
R225
1K
Ω
1/16W
Q207
MPS3906
C209
1uF/25V
C208
330pF
R224
1K
Ω
1/16W
R201
47K
L202
TRANSFORMER
1
4
2
3
+
C201
150uF/25V
C202
0.1uF/25V
R226
1K
Ω
1/16W
R208
4.7K
Ω
1/16W
Q203 SI4431DY-T1
is power GND
R210
9.1K
Ω
1/16W
C219
1uF/25V
C225
1uF/25V
C205
0.1uF/25V
4
8
5
6
7
3
2
1
R234
910
Ω
1/16W
R207
NC
R232
1K
Ω
1/16W
+
C207
4.7uF
R222
12K
Ω
1/16W
R227
1K
Ω
1/16W
CN201
CONN
1
2
R218
100
Ω
1/16W
C203
1uF/25V
47
ViewSonic Corporation
Confidential - Do Not Copy
VA502mb-1
Model
Title
Date
Rev:
ViewSonic Corporation
INVERTER
Summary of Contents for VA502mb-1
Page 10: ...7 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 13: ...10 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 14: ...11 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 16: ...PIN Descriptions 13 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 18: ...Block Diagram PIN Function 15 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 38: ...5 7 Packing Procedure 35 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 42: ...39 ViewSonic Corporation Confidential Do Not Copy VA502mb 1 6 Troubleshooting Flow Chart...
Page 43: ...7 Block Diagram 40 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 53: ...9 PCB Layout Diagrams MAIN BOARD 50 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 54: ...POWER BOARD 51 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 56: ...53 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 57: ...AUDIO BOARD 54 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 58: ...KEY BOARD 55 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 61: ...58 ViewSonic Corporation Confidential Do Not Copy VA502mb 1 Packing for Shipping...