Service manual

TO RS232
TO DEBUG
W/O Audio : R100= 0 Ohm , Other N.C.
SCL
SDA
SDA
SCL
WP
POWER
AUTO/UP
LEDG
LEDA
MENU/DOWN
ADJUST+
ADJUST-
HI_BRIGHTNESS
TXD
RXD
ADJUST+
LEDG
RXD
LEDA
ADJUST-
TXD
HI_BRIGHTNESS
WP
POWER
MENU/DOWN
AUTO/UP
STBY
MUTE
MUTE
VOL
VOL
STBY
SCL
IRQN
SDA
12M_OSC
DDC_SCL
DDC_SDA
SCL
SDA
VGA_DET
BL_EN
BL_BRIGHT
PWR_EN
HSO
DDC_SDA
DDC_SCL
AMP_MUTE
AMP_STBY
VOLUME
RSTN
VSO
DGND
MCU_VDD
DGND
DGND
MCU_VDD
DGND
DGND
MCU_VDD
DGND
DGND
3.3V
MCU_VDD
MCU_VDD
3.3V
MCU_VDDMCU_VDD
DDC_VDD
3.3V
3.3V
DGND
DGND DGND
DGND
DGND
DGND
DGND
5VA12V
DGND DGND
5VA
DGND
DGND
DGND
R95
4.7k
CN4
3PIN/2.0mm
1
2
3
R97
47k
R25 100
R39 100
C29
0.1u
C26
100p
R84
NC
+
C15
47u/16V
R29
2k
+
C101
47u/16V
R82 NC
C21
22p
R26 1M
R24 100
R98
47k
R52 1k
Q1
MMBT3904
1
32
R83
NC
R35 15k
C36
0.1u
R34
6.8k
R90
680
C19
100p
C27
1u
R50 100
R81 NC
R85 100
R96
47k
C16
100n
R40
NC
C31
0.1u
R31
2k
R49 330
U2
NT68F633
4 1 4 2 4 3
10
44
12
22 20 21
11
13
16
17
15
14
24 23
9
8
7
6
32
40
39
5
33
38
37
36
1
35
34
31
30
29
2
25 26 27 28
3 4
19 18
PC2
PC1* PC0*
RSTB
VCC
PD6
GND OSCO OSCI
P30/RXD
P31/TXD
P34/T0
P35/T1
PB3/ADC3/INTE1
PB2/ADC2/INTE0
PB1/ADC1 PB0/ADC0
PA7/PWM9*
PA6/PWM8*
PA5/PWM7*
PA4/PWM6*
NC
PC3/PWM0
PC4/PWM1
PA3/PWM5
NC
PC5
PC6
PC7
PD0
PD1
PD2
PD3
PD4
PD5
PA0/PWM2
PB4/SCL0* PB5/SDA0* PB6/SCL1* PB7/SDA1*
PA1/PWM3 PA2/PWM4
PE1 PE0
C33
0.1u
CN3
9PIN/2.0mm
1
2
3
4
5
6
7
8
9
R51 100
R93
4.7k
R38 100
R33
4.7k
R32
2k
D16
5.1V
R48 330
C17
100p
R28 100
R101
10k
R21
4.7k
CN2
4PIN/2.0mm
1
2
3
4
R102 100
R27 100
R30
2k
D14
BAV99
1
3
2
C22
22p
R99
10k
Q2
MMBT3904
1
32
R87 100
C28
0.1u
R20
1k
Q3
MMBT3904
1
32
C34
0.1u
X1
12MHz
R100
10k
C30
0.1u
R47 1k
R23 100
R86 100
R22
15k
R94
4.7k
C35
0.1u
R37
NC
R46 1k
C24
NC
C32
0.1u
R53
NC
R43 1k
R41
NC
U3
AT24C16
1
2
3
4 5
6
7
8
A0
A1
A2
GND SDA
SCLK
WP
VCC
R36
NC
C25
NC
C18
100p
D15
BAT54C
R42 1k
C14
1u
R44 1k
Model
Title
Date Rev:
ViewSonic Corporation
MCU
ViewSonic Corporation Confidential - Do Not Copy
63
Q9b-2