ViewSonic VA2012wb-1 Service Manual page 69

6 BL-ON
MCU-VDD
R34
MCU-VDD
C36 47uF/16V
C37 0.1uF/6
GND_A
3 BYPASS-VS
GND_A
R37 1M/6
Y1 12MHZ
C39 C40
22pF/6 22pF/6
GND_A GND_A
R45 0/6 C41 22pF/6
3 REFCLKI
+5V
R49
1K/6
BL-PWM R51 4.7K/6
+5V
GND_A
R54
1K/6
R58 4.7K/6
VOL-PWM
GND_A
MUTE- LEFT-
GND_A
MCU-VDD
ViewSonic Corporation
R32 4.7K/6
R31 4.7K/6
+5V +5V
MUTE
MUTE 7
PANEL_SEL3
100K/6
IC3
41 33
PC2/SOGI NC2
42 32
PC1* NC1
40
43
PC0* PC3
39
10
RSTB PC4
GND_A 38
44
VDD PC5
19
12
PD6 PE1
22 18
GND PE0
20 68F633L 37
OSCO PC6
21 36
OSCI PC7
11 1
1 Rx P30/RXD PD0
13 35
1 Tx P31/TXD PD1
SCL 34
16
P34/T0 PD2
SDA 31
17
P35/T1 PD3
5V-DETECT 30
15
PB3/ADC3/INTE1 PD4
14 29
3 IRQn PB2/ADC2/INTE0 PD5
RIGHT
24 2
PB1/ADC1 PA0/PWM2
LEFT
23 25
PB0/ADC0 PB4*/SCL0*
BL-PWM
9 26
PA7*/PWM9* PB5*/SDA0*
VOL-PWM
8 27
PA6*/PWM8* PB6*/SCL1*
PANEL_SEL2
7 28
PA5*/PWM7* PB7*/SDA1*
PANEL_SEL1
6 3
PA4*/PWM6* PA1/PWM3
STANDBY
5 4
PA3/PWM5 PA2/PWM4
68F633-PLCC44
MCU-VDD
R50
BL-BRIGHT 6
CN3
MUTE-
11
MENU-
10
SEL-
9
PWR-
8
DOWN-
7
UP-
6
RIGHT-
5
LEFT-
4
VOLUME 7
3
2
1
CON11P-2.0S
GND_A
RIGHT- UP-
GND_A GND_A GND_A
MCU-VDD MCU-VDD MCU-VDD
66 VA2012w-1_VA2012wb-1
Confidential - Do Not Copy
MCU-VDD
PANEL_SEL1
GND_A
MUTE_KEY
RSTn 3
BYPASS-HS 3
PWR
LCD-ON 5
MENU
WP
DOWN
DVI-DET 2
VGA-DET 1
SEL
UP
R40 100/6
DVI-SCL 2
R41 100/6
DVI-SDA 2
R42 100/6
VGA-SCL 1
R43 100/6
VGA-SDA 1
LEDG1
LEDA1
4.7K/6
STANDBY 7
R112 1K/6
MUTE_KEY
R55 1K/6
MENU
R57 1K/6
SEL
R59 1K/6
PWR
R60 1K/6
DOWN
R61 1K/6
UP
R62 1K/6
RIGHT
R64 1K/6
LEFT
R65 330/6
LEDA
R66 330/6 LEDG
DOWN- PWR- SEL-
GND_A GND_A GND_A
MCU-VDD MCU-VDD MCU-VDD
MCU-VDD MCU-VDD
PANEL_SEL2 PANEL_SEL3
GND_A GND_A
MCU-VDD
+5V IC4
1 8
A0 VCC
2 7
A1 WP
3 6
A2 SCL
4 5
GND SDA
AT24C16
5V-DETECT GND_A
GND_A
GND_A
MCU-VDD
JP1
1
+5V
TX
2
RX
3
4
GND_A
CON4/NC
SCL
SDA
For Debug Use
MCU-VDD
Q1
R56 4.7K/6
2
LEDA1
MMST3906
Q2
R63 4.7K/6
2
LEDG1
MMST3906
MENU-
GND_A
ViewSonic Corporation
MCU-VDD
Model
Title
Date
MCU-VDD
R110 22/6 WP
SCL 3
SDA 3
GND_A
JP2
1
SCL
2
SDA
3
4
CON4/NC
GND_A
LEDA
LEDG
MCU(I/O_Key)
Rev: