ViewSonic VA902B Service Manual - Page 47

ViewSonic Corporation, nfidential, Do Not Copy, VA902/b

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MUC 10K 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 8 R134 1 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 A0 VCC 8 7 3 4 A1 WP A2 SCL GND SDA 6 5 U106 24C16 R140 R141 1 RP104 10K 2 3 4 INT R138 10K 100 100 VCPU R139 10K 10 14 RST P3.2/INT0 32 PSEN C151 0.1/50V 16 17 18 P3.4/T0 P3.5/T1 P3.6/WR 8 9 23 33 P1.6/PWM3 P1.7/PWM4 P4.0 34 ALE P4.1 PANEL_ENABLE CCFL_ENABLE DET_VGA VCPU R142 220 R143 4K7 8 7 6 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 43 P0.0 42 P0.1 P0.2 P0.3 P0.4 P0.5 P0.6 P0.7 41 40 39 38 37 36 12 P4.3/INT2 P2.0 24 25 P2.1 26 P2.2 P2.3 P2.4 P2.5 27 28 29 P3.7 19 P3.3/INT1 15 P3.1/TXD P3.0/RXD 13 11 22 VSS 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 C156 C157 C158 C159 C160 1000P/50V 1000P/50V 1000P/50V 1000P/50V 1000P/50V 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 ViewSonIinc noLux Document Number : 0921341040 TITLE : MCU LE1909 (VA902/VbA)902/b SIZE : A4 APPRO BY : CHECK BY : DATE : SHEET 6 2005-06-07 OF 6 Rev : V01 DRAWN BY : ViewSonic Corporation Confidential - Do Not Copy VA902/b 44

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44
ViewSonic Corporation
Co
nfidential
-
Do Not Copy
VA902/b
MUC
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
LED_ORANGE
R141
100
C151
0.1/50V
AD1
C159
1000P/50V
FB108
BEAD60OHM
KEY_SELECT/AUTO
R148
1K
AD3
AD2
C156
1000P/50V
CCFL_ENABLE
VCPU
LED_ORANGE
R156
10K
R131
0
R142
220
R145
220
DET_VGA
LED_GREEN
C148
10u/16V
VCPU
VCPU
R134
10K
AD0
LED_GREEN
CN106
2x4PIN
8
1
3
5
2
7
4
6
C157
1000P/50V
R158
51
VCPU
R133
10K
R159
220
R150
1K
U106
24C16
1
2
3
4
5
6
7
8
A0
A1
A2
GND
SDA
SCL
WP
VCC
RP103
10K
8
1
7
2
6
3
5
4
RP101
10K
8
1
7
2
6
3
5
4
C153
NC/10u/16V
PANEL_ENABLE
R140
100
D102
SN4148
HWRESET
R152
100
R146
1K
VCPU
R143
4K7
DDC_SDA_VGA
ISP for Standard
8051
C155
12p/50V
SDA/WRZ
VCPU
R139
10K
X101
22.1184MHz
Q104
PMBT3906
C150
10u/16V
VCC5V
R137
10K
C160
1000P/50V
TO KEY PAD
Q105
PMBT3906
CSZ/ALE
C149
0.1/50V
KEY_UP
R138
10K
DDC_SCL_VGA
V01
6
6
A4
0921341040
LE1909 (VA902/b)
MCU
2005-06-07
InnoLux
Document Number :
SIZE :
TITLE :
DATE :
SHEET
OF
Rev :
DRAWN BY :
CHECK BY :
APPRO BY :
R155
10K
VCPU
R153
100
RP104
10K
8
1
7
2
6
3
5
4
KEY_MENU/EXIT
R149
1K
R144
4K7
KEY_POWER
INT
C158
1000P/50V
SCL/RDZ
RP102
10K
8
1
7
2
6
3
5
4
KEY_DOWN
C154
12p/50V
R147
1K
R132
10K
ViewSonic
VA902/b