![background image](http://html1.mh-extra.com/html/viewsonic/va502mb-1/va502mb-1_service-manual_1020920045.webp)
C201
0.1uF
Q204
PMBS3904
3
2
1
VAA4
C217
0.068uF
R211
10K
Ω
1/16W
SOT-252
VCC5V+
C212
0.1uF
VAA3
4
R208
10K
Ω
1/16W
CN201
CONN
2
4
6
8
10
12
1
3
5
7
9
11
C
B
E
VCC5V
VCC12V
R212 4.7K
Ω
1/16W
VCC3.3
R210
NC
VCC5V
C205
0.1uF
VAA1
4
onPanel_5V/3.3V
6
C210
0.1uF
VCC12V
NEW
Circuit
VCC12V
VCC5V
R202
10K
Ω
1/16W
R209
0
Ω
1/16W
VAA2
4
VCC5V
FB201
600 OHM
GND
+
C204
220uF/25V
GND
D201 SS14
VLCD
5
+
C208
100uF/16V
R216
4.7K
Ω
1/16W
R214 delete
VCC5V+
VCC5V
C203
0.1uF
VAA3
VCC5V
+
C211
47uF/16V
U202
AIC1084-33M
3
1
2
VIN
ADJ
VOUT
R201
4.7K
Ω
1/16W
TO-263
VAA4
4
R205 4.7K
Ω
1/16W
AdjBACKLITE
4
VCC5V+
+
C202
220uF/25V
D202
GS1D
VCC12V
C216
0.1uF
VCC5V
GND
DIM
VCC5V
C207
0.1uF
VAA2
C214
0.1uF
VAA1
Q202
PMBS3904
3
2
1
VCC3.3
R207
4.7K
Ω
1/16W
R204
10K
Ω
1/16W
VCPU
C
B
E
GND
R206
10K
Ω
1/16W
C206
1uF/25V
Brightness
R213
NC
VCC2.5
4
U201
RT9164
3
2
1
VI
VO
GND
VCC3.3
4
VCC5V
3,4,6
R203
1K
Ω
1/16W
VCC12V
6
VCC2.5
VLCD
R215
100K
Ω
1/16W
+
C215
47uF/16V
VCPU
6
ON_OFF
GND
GND
3
Q201
PMBS3904
2
1
onBACKLITE 6
Q203
AO3401
42
ViewSonic Corporation
Confidential - Do Not Copy
VA502mb-1
Model
Title
Date
Rev:
ViewSonic Corporation
POWER
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...