ViewSonic VX750 VLCDS27089-1W, Service Manual

Page: 62 / 73

SDA 5
X2
11.0592MHz
L15 1K/6 1 2 1
SDA-VGA
SCL-VGA
MH0003
R48 100/6
1 2
D28
DAN217K/NC
1
2
3
PWR_SEL
D27
DAN217K/NC
1
2
3
BRIGHTNESS
C55
22P/6
1
2
+5V
L16 1K/6 1 2
VDDCTRL_1 6
SDA_O
VCPU
+5V
+5V
VGA_CON 3
VDDCTRL_2 6
12V
R129
10K/6
1
2
LED_G
SS0003
KEY_ESC_O
SCL
5
KEY_SEL
R38
10K/6
1
2
R50
NC
1
2
HP-MCU 3
L23
0/8
1 2
R82 4.7K/6
D31
DAN217K/NC
1
2
3
KEY_UP
LED_G
C57
22P/6
1 2
V
R71
7.5K/6
DEBUG PORT
R56
1
2
DDC_VS
3
KEY_UP_O
R64 NC
1 2
SCL_1
C63
12p/6/NS
D30
DAN217K/NC
1
2
3
R139
1K/NC
1 2
L21 1K/6 1 2
R55
10K/6
1
2
LED_R
Q13
MMST3906/NC
Q14
MMST3906/NC
R141
3.3/NC
1
2
SDA-VGA 3
KEY_DOWN
INVCTRL
Q2
MMST3906
R40
10K/6
1
2
C44
0.1U/6
1
2
C65
12p/6
PWR_ON/OFF
D29
DAN217K/NC
1
2
3
CSZ 5
PWR_ON/OFF
C67
0.1u/6
C56
22P/6
1
2
R67
100/6
1 2
+5V
R47 100/6
1 2
C60
0.1u/8
VCPU
KEY_RIGHT
L18 1K/6 1 2
MCP810M3X-2.93
R132 0/NC
1 2
VCPU
C136
0.1u/6/NC
1
2
MUTE
R137
4.7K/NC
1
2
TO BUTTON BOARD
SDA_1
SCL_O
U4
NC
1 2
3
VCC RESET
GND
2
KEY_SEL_O
R66 22/6
1 2
+5V
R74
7.5K/6 1 2
L24
CX000800000/1206
1
2
R58 2.2K/6
1 2
DSUB_5V
R68 10K/6
1 2
R41
10K/6
1
2
+5V
KEY_UP
R84 4.7K/6
+5V
R53 22/6 1 2
R78
100K/6
1 2
PC5V_OFF
R135
1K/NC
1
2
U6
MTV312
17
18
20
21
22
23 24
25
7
29
28
19
4
13
14
5
6
11
12 10
43
44
30
31
32
33
37
36
41
15
40
42
1
2
3
9
16
26
27
8
39
38
35
34
P1.0
P1.1
P1.2
P1.3
P1.4
P1.5 P1.6
P1.7
RST
P3.0/RXD/HSCL
P3.1/TXD/HSDA
P3.2/INT0
VDD3
P3.4/T0/ISDA
P3.5/T1/ISCL
NC
NC
X2
X1 VSS
HSYNC
VSYNC
P6.4/DA10
P6.5/DA11
P6.6/DA12
P6.7/DA13
P4.1/HBLANK
P4.0/VBLANKK
P5.4/DA4
P4.2/STOUT
P5.5/DA5
P5.3/DA3
P5.2/DA2
P5.1/DA1
P5.0/DA0
P6.3/AD3
P6.2/AD2
P6.1/AD1
P6.0/AD0
VDD
HALFV/DA8
HLFHO/DA9
HCLAMP/DA7
P5.6/DA6
KEY_UP_O
R138
2K/NC
1
2
D26
DAN217K/NC
1
2
3
C47
0.1U/6
1
2
VCPU
+5V
MH0002
VDD3V3
DSUB_5V
R62 0/6/NC 1 2
CN3
4501-08-08P-R
1
2
3
4
5
6
7
8
C68
1u/8
1
2
C51
0.1U/6/NC
12V
C45
1U/8
1
2
G
+5V
U5
24LC16
1
2
3
4
5
6
7
8
A0
A1
A2
VSS
SI
SCK
WP
VCC
modify debug port
+5V
MUTE_F_O
CN5
4606-06-06P-R
1
2
3
4
5
6
R49
4.7K/6
1 2
C62
1U/6
C46
0.1U/6
1
2
R44
10K/6
1
2
MUTE 7
KEY_DOWN_O
C64
12p/6
R
KEY_LEFT
C141
0.01u/6
XTAL 5
C54
22U
1
2
C135
0.1u/6/NC
1
2
R59 10K/6 1 2
R20
100/6
VDD3V3
+5V
PWR_ON/OFF_O
R70
0/6/NS
R85
4.7K/6
R80 100/6 1 2
R77
0/6 1 2
MH0001
LED_R
R136 47/NC
1 2
R21 100/6
R46
2K/6
1
2
R42
10K/6
1
2
R130 2.2K/6
1 2
PWR_SEL
L25
CX000800000/1206
1
2
R81 220/6 1 2
CN6
4501-04-04P-R
1
2
3
4
R54 22/6 1 2
+5V
L19 1K/6 1 2
Q15
2N3904/NC
2
3
1
R131 100/6 1 2
R133
6.8K
1
2
L22 0/8 1 2
KEY_ESC_O
SDA_1
R79 100/6
D25
DAN217K/NC
1
2
3
+5V
R52
NC
1
2
R57 22/6 1 2
C58
22P/6
1 2
+5V
R51
10K/6
1
2
MUTE_F
PWR_ON/OFF_O
C48
0.1U/6
VCPU
KEY_DOWN_O
R39
10K/6
1
2
VCPU
R45
2K/6
1
2
INT 5
D32
DAN217K/NC
1
2
3
CN4
JWT-A2001WV2-06/NC
1
2
3
4
1
2
3
4
BRIGHTNESS 5
KEY_LEFT
R134
4.7K
1
2
SCL-VGA 3
KEY_LEFT_O
R60
2.2K/6 1 2
PC5V_OFF
C49
0.1U/6
Q4 2N7002
3
1
2
VCPU
VCPU
KEY_DOWN
R73
1U/6
Q3
MMST3906
D43
BAT54C-GS08
KEY_RIGHT_O
KEY_SEL_O
C66
12p/6
R65 NC
1 2
C52
0.1U/6/NC
KEY_ESC
C59 0.1U/6/NC
1 2
MUTE_F_O
MUTE_F
+5V
+5V
VCPU1
KEY_RIGHT_O
2.0mm pitch
90° E&T
RESET
5
KEY_SEL
D42
5.1V/NC
2
1
R19 33/6
+5V
Q1 2N7002
3
1
2
L20 1K/6 1 2
R43
10K/6
1
2
L17 1K/6 1 2
SCL_1
R61 10K/6 1 2
INVCTRL
KEY_ESC
R83
5.6K/6
C61
330u/16V
VCPU1
C53
0.1U/6
1
2
C50
0.1U/6
3
+5V
KEY_LEFT_O
KEY_RIGHT
R72
10K/6
1
2
59
ViewSonic Corporation
Co
nfidential - Do Not Copy VX750