ViewSonic VE910B Service Manual page 57

10.5. MCU
( 3 )
PC5V
VCPU
+ C123
4.7uF/50V
R125
2K2 1N4148
VCPU
C128
0.1uF
I105
1 8
A0 VCC
2 7
A1 WP
3 6
A2 SCL
4 5
GND SDA
24C16
R177
NC
( 8 ) VOLUME
R184
+
C139
NC
NC
ST AUDIO USE 5.6K
P103
8
LCD_ONOFF
7
LED_AMBER
6
LED_GREEN
5
GND
4
MENU
3
UP
2
DOWN
1
SELECT
JST-PH8P-2.0-90
ViewSonic Corporation
PC5V VCC5V
D108 D109
D112
D110
1N4148 1N4002
1N4002 SB14
( 4 ) TCLK
C126 X101 R126
27pF 12MHZ 1M
D107
C127
27pF
( 4 ) INT
R128
10K
EXIT
MINUS
PLUS
MENU
VCC5V
LED_G
POWER
LED_A
R176
NC
PWM VOLUME
RP01
10K
VCPU
VCPU
5
6
7
8
5
6
7
8
C129 C130 C131 C132 C133 C134 C135
NC NC NC NC NC NC NC
Confidential - Do Not Copy
54
+ C124 C125
47uF/16V
0.1uF
I102
39
P1.0
38
P1.1
18 37
X2 P1.2
36
P1.3
19 35
X1 P1.4
34
P1.5
33
P1.6
9 32
RST P1.7
12 21
P3.2/INT0 P6.0/AD0
22
P6.1/AD1
23
P6.2/AD2
29 24
NC P6.3/AD3
30 25
NC P6.4
31 26
NC P6.5
27
P6.6/CLKO
13 28
P3.3/INT1 P6.7
14
P3.4/T0
15 16
P3.5/T1 P7.6/CLKO
1 17
P5.0/DA0 P7.7
2
P5.1/DA1
3
P5.2/DA2
DDC_DAT
4 11
P5.3/DA3 HSDA1/TXD0/P3.1
5 10 DDC_CLK
P5.4/DA4 HSCL1/RXD0/P3.0
6
P5.5/DA5
7
HSCL2/P5.6
8
HSDA2/P5.7
CS8954(PDIP40)
RP07
4K7
VCC_3v3
R134 R132
RP04
100 470 10K
4
POWER R133
3
10K
2 2
LED_A
1 1
3
4 MENU Q103
PLUS 2N3906
3
MINUS
2
1 EXIT
RP05
100
VE910/b
VCPU
RP02 RP03
10K 10K
VCC_3v3
VCC_3v3 ( 2,4 )
R161 4K7
onPANEL ( 5 )
AUDIO_STANBY ( 8 )
onBACKLIGHT ( 2 )
DDC_DAT ( 3 )
DDC_CLK ( 3 )
RP06
VCPU
2K7
VCC_3v3
R137 R135
470 10K
R136
10K
2
LED_G
1
3
Q104
2N3906
SCL-RDZ ( 4 )
SDA-WRZ ( 4 )
CSZ-ALE ( 4 )
HWRESET ( 4 )
AD3 ( 4 )
AD0 ( 4 )
AD1 ( 4 )
AD2 ( 4 )