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- 16 –
ViewSonic Corporation
Confidential - Do Not Copy
VG720
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.
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.
Power Board
(Include: adapter, inverter)
Flat Panel and
CCFL backlight
Main Board
Key Board
RS232 Connector
For white balance
adjustment in factory
mode
HOST Computer
CCFL Drive.
AC-IN
100V-240V
Video signal, DDC
Monitor Block Diagram
R
G
B
H
V
SDA
SCL
OSC
Backlight and Panel
PWPC board
EPROM
EPROM
Keyboard
TSUM56AK
Summary of Contents for VG720 - 17" LCD Monitor
Page 37: ...37 ViewSonic Corporation Confidential Do Not Copy VG720 Sep2 Inpute the S N and execute Enter...
Page 38: ...38 ViewSonic Corporation Confidential Do Not Copy VG720...
Page 39: ...39 ViewSonic Corporation Confidential Do Not Copy VG720 Sep3 Key the Enter and write the data...
Page 41: ...41 ViewSonic Corporation Confidential Do Not Copy VG720 5 7 Packing For Shipping...
Page 43: ...43 ViewSonic Corporation Confidential Do Not Copy VG720 6 Troubleshooting Flow Chart...
Page 62: ...62 ViewSonic Corporation Confidential Do Not Copy VG720...
Page 63: ...63 ViewSonic Corporation Confidential Do Not Copy VG720...
Page 80: ...80 ViewSonic Corporation Confidential Do Not Copy VG720 12 2 MAIN BOARD PCB BUTTON VIEW...
Page 82: ...82 ViewSonic Corporation Confidential Do Not Copy VG720 12 5 POWER PCB TOP VIEW...
Page 83: ...83 ViewSonic Corporation Confidential Do Not Copy VG720 12 6 POWER PCB BUTTON VIEW...
Page 84: ...84 ViewSonic Corporation Confidential Do Not Copy VG720 12 6 AUDIO PCB TOP VIEW...
Page 85: ...85 ViewSonic Corporation Confidential Do Not Copy VG720 12 6 AUDIO PCB BUTTON VIEW...