ViewSonic va520 Service Manual page 51

10.5. MCU (Realtek Scaler)
VCPU
R124
D113
1K
IN4148 Q101
2
MMBT3906
1
3
C117
10uF/16V
VCPU
C122
100nF
R128 R129
4K7 4K7
I105
1 8
A0 VCC
2 7
A1 WP
3 6
A2 SCL
4 5
GND SDA
24C16
MUTE
ST_DET1
VCPU
R146
10K
P104
1
2
3
4
5
6
7
8
CON8
C131 C130 C129 C128
NC/100p NC/100p
NC/100p NC/100p
ViewSonic Corporation
3DVCC
3DVCC
R199
10K
R132 100
RTD_RESET
C118
NC/10uF/16V
X101
12MHz R127 C119 I104
1M 22pF
D114
12
IN4148 X1
C121
22pF
11
X2
7
RESET
19
INT0/P3.2
R134 100
14
ISCL/P3.5/T1
R135 100
13
ISDA/P3.4/T0
27
P6.0/AD0
26
P6.1/AD1
16
P6.2
9
P6.3
30
P6.4
31
P6.5
LED_G
32
P6.6
LED_O
12V 33
P6.7
MTV312M64
R142
9K09 1%
R148
3K32 1%
R156 100 2
R155 100 down
up
R154 100
R153 100 1
R152 100 green
R151 100 orange
R150 100 power
C126 C125 C127
NC/100p NC/100p
NC/100p
Confidential - Do Not Copy
48
VCPU
VCC3V3
R125
C116
0R 0603
RN1 RN2
100nF
10K X4
10K X4
3 1
P5.0
UP
2
P5.1
DOWN
1
P5.2
2
42
P5.3
41 power
P5.4
R130
40
P5.5
34
P5.6
39
DA8/HLFHO
38
DA9/HALFV
17
P1.0
18
P1.1
20
P1.2
21
P1.3
22
P1.4
23
P1.5
24
P1.6
R136 NC
25
P1.7
35
DA7
36
P4.0
37 VCC3V3 VCPU
P4.1
15
P4.2
WP R138 NC
28
P3.1/TXD
29 R140
P3.0/RXD
2K2
R143
NC
VCC3V3
Q102
R149
MMBT3906
2
1 4K7 LED_O
3
C123
orange
NC
VCC3V3
Q103
MMBT3906
R157
2
4K7 LED_G
1
3
GREEN C124
NC 1 (B)
VA521
VE510b/s-2
VCPU
RN4
RN3
10K X4
10K X4
1K
onPanel_12V
R133
R137
NC
R139
2K2
R144 100
R145 100
3 (C)
2 (E)
onPanel_3V3
1K
onBacklight
RTD_SCSB
RTD_SCLK
RTD_SDO_OR_SDI
DDC_CLK
DDC_DAT