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4. Circuit Description
4.1 LCD MONITOR DESCRIPTION
The LCD MONITOR will contain a Main Board, an Power Board, Key Board which
house the flat panel control logic, brightness control logic and DDC.
Power Board
(Include: adapter, inverter)
AC-IN
100V-240V
4.2 MAIN BOARD BLOCK FUNCTION DESCRIPTION
The main board contains panel control logic, brightness control logic, DDC and DC
convert DC circuit and so on.
R
G
B
H
V
SDA
SCL
ViewSonic Corporation
Monitor Block Diagram
CCFL Drive.
Main Board
Key Board
EPROM
EPROM
Flat Panel and
CCFL backlight
HOST Computer
PWPC board
TSUM56AK
OSC
Confidential - Do Not Copy
13
RS232 Connector
For white balance
adjustment in factory
mode
Video signal, DDC
Backlight and Panel
Keyboard
VG720-1
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