ViewSonic VA702B Service Manual - Page 58

Winbond W78E65P

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VCPU VCC5V VCPU FB108 BEAD60OHM C148 10u/16V C149 0.1/50V 0 10K 10K 4 3 2 1 4 3 2 RP101 RP102 RP103 10K 10K 10K 1 5 6 7 2 3 4 8 7 6 5 8 7 6 5 P2.7 31 R133 P2.6 30 R132 EA 35 R131 C150 10u/16V U105 Winbond W78E65P D102 SN4148 R137 10K VCPU 1 2 3 4 A0 A1 A2 GND VCC WP SCL SDA 8 7 6 5 U106 24C16 R140 R141 1 8 PANEL_ENABLE CCFL_ENABLE DET_VGA RP104 10K VCPU R142 220 R143 4K7 7 2 6 3 R138 10K INT R139 10K 10 14 RST P3.2/INT0 32 PSEN C151 0.1/50V 4 100 100 VCPU 16 17 18 P3.4/T0 P3.5/T1 P3.6/WR 8 9 23 33 34 P1.6/PWM3 P1.7/PWM4 P4.0 ALE P4.1 5 C153 R144 NC/10u/16V 4K7 2 3 4 5 6 7 P1.0 P1.1 P1.2 P1.3 P1.4 P1.5 1 P4.2 VDD 44 P0.0 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 43 42 41 40 39 38 37 36 P4.3/INT2 12 P2.0 P2.1 P2.2 P2.3 P2.4 P2.5 24 25 26 27 28 29 P3.7 19 P3.3/INT1 15 P3.1/TXD P3.0/RXD VSS 13 11 22 20 X2 21 X1 LED_GREEN Q104 PMBT3906 R158 51 VCPU R145 220 LED_ORANGE R159 220 Q105 PMBT3906 C154 12p/50V X101 C155 22.1184MHz 12p/50V ISP for Standard 8051 ViewSonic Corporation Confidential - Do Not Copy 55 VA702-1_VA702b-1 C156 C157 C158 C159 C160 1000P/50V 1000P/50V 1000P/50V 1000P/50V 1000P/50V 1 8 R134 10K R146 R147 R148 R149 R150 LED_GREEN 6 LED_ORANGE 8 1K KEY_POWER 4 1K KEY_SELECT/AUTO 1 1K KEY_UP 3 1K KEY_DOWN 5 1K KEY_MENU/EXIT 2 7 TO KEY PAD HWRESET CSZ/ALE SCL/RDZ SDA/WRZ AD0 AD1 AD2 AD3 VCPU R156 R155 10K 10K R153 100 R152 100 CN106 2x4PIN DDC_SDA_VGA DDC_SCL_VGA ViewSonic Corporation Model Title MCU Date Rev:

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R131
0
U106
24C16
1
2
3
4
5
6
7
8
A0
A1
A2
GND
SDA
SCL
WP
VCC
KEY_SELECT/AUTO
TO KEY PAD
R145
220
RP102
10K
8
1
7
2
6
3
5
4
C159
1000P/50V
Q104
PMBT3906
R152
100
C156
1000P/50V
C160
1000P/50V
INT
R156
10K
VCPU
KEY_POWER
R142
220
Q105
PMBT3906
AD3
VCPU
R148
1K
R133
10K
RP104
10K
8
1
7
2
6
3
5
4
VCPU
AD1
CN106
2x4PIN
8
1
3
5
2
7
4
6
C154
12p/50V
C148
10u/16V
LED_GREEN
LED_ORANGE
R147
1K
DET_VGA
AD2
RP103
10K
8
1
7
2
6
3
5
4
R137
10K
R138
10K
KEY_DOWN
ISP for Standard
8051
C149
0.1/50V
VCPU
LED_ORANGE
R144
4K7
U105
Winbond W78E65P
1
2
3
4
5
6
7
20
21
22
24
25
26
27
28
29
30
32
35
36
37
38
39
40
11
13
14
16
17
41
42
43
44
10
31
15
18
12
19
8
9
23
33
34
P4.2
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5
X2
X1
VSS
P2.0
P2.1
P2.2
P2.3
P2.4
P2.5
P2.6
PSEN
EA
P0.7
P0.6
P0.5
P0.4
P0.3
P3.0/RXD
P3.1/TXD
P3.2/INT0
P3.4/T0
P3.5/T1
P0.2
P0.1
P0.0
VDD
RST
P2.7
P3.3/INT1
P3.6/WR
P4.3/INT2
P3.7
P1.6/PWM3
P1.7/PWM4
P4.0
ALE
P4.1
R146
1K
CCFL_ENABLE
R134
10K
C155
12p/50V
R140
100
SCL/RDZ
R149
1K
AD0
DDC_SDA_VGA
PANEL_ENABLE
KEY_MENU/EXIT
R141
100
R139
10K
LED_GREEN
D102
SN4148
RP101
10K
8
1
7
2
6
3
5
4
C153
NC/10u/16V
VCPU
KEY_UP
R143
4K7
R150
1K
HWRESET
C150
10u/16V
FB108
BEAD60OHM
SDA/WRZ
VCPU
DDC_SCL_VGA
R158
51
R155
10K
R132
10K
VCPU
R159
220
VCC5V
C158
1000P/50V
R153
100
C157
1000P/50V
C151
0.1/50V
CSZ/ALE
X101
22.1184MHz
ViewSonic Corporation
Confidential - Do Not Copy
VA702-1_VA702b-1
5
5
Model
Title
Date
Rev:
ViewSonic Corporation
MCU