ViewSonic ViewPanel VGI50 Service Manual page 28

THEORY OF CIRCUIT OPERATION
3
Description
P1.0
VO SDA of ?C for communication with ICS1523
SCL of ?C for communication with ICS1523
Power switch of +5V and VLCD
1
a)
—_
—"
P1.2
P1.3
P1.4
Fine tune function select
H-Sync polarity
V-Sync polarity
Inverter enable
AM100 Rest signal
MPU Rest signal
7 P1.6/ADD
P1.7/AD1
RST
HSCL
HSDA
z|z 210
10
14
12
(os) foe)
W ¢))
13 HSYNC
M52473
15
16
17
VSYNC
HBK/P4.1
VBK/P4.0
z Q
—_
Oscillator output
Negative Power Supply
21
22
23
24
25
v0 Nh an
vu
N iN
w [ho
Reserve
D13/P2.4
Page 25
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