ViewSonic VLCDS27955-1W Service Manual page 30

DDC5V
2 3 1
Q4
D12
2N3906
1N4148
R52
R53
2k
4.7k
3
1
DDC5V-OFF
2
R56
Q5
1K 2N3904
VCC
2 3
Q6
D15 2N3906
R66
C68
100K 1N4148
0.1uF
R69
10K
C70
1uF/0603
MCU33
C37
0.1uF R55
4
100
VSS
1 6
A0 SCL
2
A1
3 5
A2 SDA
7
WP R56
100
U5
24LC16B
VCC
SCL
SDA
TxD
RxD
JP6
FB15 0603
1 1 2
FB16 0603
2
3 1 2
4 FB17 0603
5 1 2
FB18 0603
6
1 2
FB19 0603
1 2
KeyPad
ViewSonic Corporation
VDD
MCU33
2 3
Q3
2N3906
2 1 2
D13
1N4148 C59 C60
R50
100uF/16V 0.1uF
10K
RESET
1 2
R64
D14
10
C65
1N4148
22pF
C69
R67
0.1uF C66
5.1K
22pF
R58
R57
4.7K
4.7K
SCL
SCL 2
SDA
SDA 2
C119 C119
33pF 33pF
JP4
1
1
2
2
3
3
4
4
5
5
6
6
DEBUG/NC
R85 100
R87
R89
R90
R91 100
C75
C74 C76 C77 C78
0.1uF 0.1uF 0.1uF 0.1uF 0.1uF
Confidential - Do Not Copy
27
C61
10nF MCU33
C62 C63
0.1uF 0.1uF
C64
0.1uF
RESET
7
RST
8
VDD
9
P6.3/AD3
R62 10
VSS
1M
X1
11
X2
12MHZ
12
X1
SDA
13
ISDA/P3.4/T0
SCL
14
ISCL/P3.5/T1
15
STOUT/P4.2
16
P6.2/AD2/HLFHI
17
P1.0
DDC5V-OFF
2 IRQ-
7 DVI-CON
R75
100
1 VGA-CON
R76
100
6 AUDIO-CON
R79
100
MCU33
RP1
4.7K*4
SW2
2
1
SW3
3 Q7
R86
100
LED_O
2N3906 4.7k
330
LED_G
330
POWER
VG510b/s
MCU33
R39 R40 R41 R42 R43
4.7k/NC 4.7k 4.7k
4.7k/NC 4.7k
MCU33
R58
4.7k
39
DA8/HLFHO
38
DA9/HALFV
37
HBLANK/P4.1
U7
36
VBLANK/P4.0
35
DA7/HCLAMP
34
DA6/P5.6
33
P6.7/DA13
32
P6.6/DA12
MCU
31
P6.5/DA11
30
P6.4/DA10
RxD
29
HSCL/P3.0/Rxd
MCU33
R72
R73 4.7k
4.7k
TxD
Note: All capacitors without specified value
R83
4.7k
R84
4.7k
ORANGE
2
GREEN
1
3
Q8
R88
2N3906
4.7k
R45 100/NC
INV_EN 2,5
R46 100
VDDCRTL 2,3
R47 100
BRI-ADJ 2,5
R48 1K
VGA_VSYNC1
R49 1K
VGA_HSYNC 1
R51 100
AUDIO-UPDOWN 2,6
R54 100
AUDIO_EN 6
R61
100
AUDIO_MUTE 2,6
VDDCRTL2 3
R63
100
VCC
R65 4.7k
C67 0.1uF
R68 6.8K
SCL-VGA 1
R71
100
R74
100
SDA-VGA 1
SW2
SW3
POWER
ORANGE
GREEN
SW4
M-RESET 2
R82
100
are 85 C type.
All C's not otherwise specified are
50V type.
All resistorwich are not otherwise
specified are 1/6W.
MODEL VG510s / VG510b
MCU
PWB-5559
PWB No.
Sheet 3/8
DWG No.
Sep 25-2003
UPDATE
REV. Nr P/R M/P- 00