ViewSonic VLCDS25973-2W Service Manual page 74

AESD_5V
D18 D19
1PS226 1PS226
1 1
GND
GND VGA2_SCL
VGA2_SDA
VGA2_VS
VGA2_HS
AESD_5V
D11 D12
1 1
1PS226 1PS226
GND
GND
15 5
10
14 4
9
13 3
8
12 2
7
11 1
6
CN2 DB15 HD F
AESD_5V
GND
C158
0.1uF
1PS226
GND
ViewSonic Corporation
DDC_SDA_VGA
DDC_SCL_VGA
VGA2_5V
D20 BAT54C
2
1
U8
3 A2DDC_5V
1 8
A0 VCC
2 7
A1 WP
3 6
A2 SCL
4 5
GND SDA
24LC21A
ANALOG DDC
R176 22R VGA2SCL
R177 22R VGA2SDA
R152 22R
R153 22R
74HCT126
U14C
9
C149
R326 R327
22pF
GND
2K2
2K2
C150
22pF
GND
GND
VGA2_5V
A2_BLU
R246 0R
A2_GRN R245 0R
A2_RED
R244 0R
D15 D16 D17
1 1 1
1PS226
1PS226
Confidential - Do Not Copy
71
VCC
VCC
R171
R172
4K7
4K7
DDC_DAT
DDC_CLK
VCC
3
2
C157 R178
R179
0.1uF
4K7
4K7
GND
R271 22
R268
8
AVSYNC
4K7
74HCT126
U14D
12 11
AHSYNC
HV_SEL
R46
R47
R48
R49 R50 R51
75R1% 75R1% 75R1%
GND GND GND
VP191b/s-1/-2
R183 NC/0R
R184 NC/0R VCC
U12
16 1
VCC -A/B
15
-OE
DDC_DAT1
2
A1
DDC_CLK1
4 5
Y1 A2
7 11
Y2 A3
9 14
Y3 A4
12
Y4
DDC_DAT2
C159
3
B1
DDC_CLK2
6
0.1uF
B2
10
B3
8 13
GND B4
PI5C3257
C4
0.1uF
R181 22R
R182 22R
R265 4K7 R266
R267 0R/NC
Q14 D TC144 Q15 DTC144
R269
2K2
C170
0.1uF
GND GND
0R
VGA_R2
0R
VGA_G2
0R
VGA_B2
ViewSonic Corporation
Title
GM5321 for VP series
Size Document Number
VGA1 INPUT
Date: Wednesday, January 12, 2005 Sheet
R235 4K7
DDCCI_SW
R185 4K7/NC
DDC_SDA_VGA1
DDC_SCL_VGA1
DDC_SDA_VGA2
DDC_SCL_VGA2
VCC
DDC_SCL_VGA2
DDC_SDA_VGA2
0R/NC
R270 2K2
EDID_WP
C171
0.1uF
Rev
D1
3 of 9