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ViewSonic Corporation
Confidential - Do Not Copy
VA1930wm-1
4
3
5.
Backlight can’t be turned on
U105 FAIL
Black screen
Check pin4 of
CN101
Check CCFL-
Enable(pin 85)
of U105
Check crystal (pin 96,97)
waveform of U105
Check reset (pin84) of
U105
Check power supply
for U105
Check power
supply:pin 1,2 of
CN101
Check R167,Q106,
R108,R110
Inverter Fail
Check
X101,C153,C154
Check C144,R172
Check FB102,FB103,
FB105,FB106
Power fail
NG
NG
NG
NG
NG
NG
YES
YES
YES
YES
YES
YES
Summary of Contents for VA1930wm-1
Page 5: ...ViewSonic Corporation Confidential Do Not Copy VA1930wm 1 2 4 Handling and Placing Methods...
Page 6: ...ViewSonic Corporation Confidential Do Not Copy VA1930wm 1 3...
Page 39: ...ViewSonic Corporation Confidential Do Not Copy VA1930wm 1 36...
Page 40: ...ViewSonic Corporation Confidential Do Not Copy VA1930wm 1 37...
Page 55: ...ViewSonic Corporation Confidential Do Not Copy VA1930wm 1 52 9 Block Diagram...
Page 63: ...ViewSonic Corporation Confidential Do Not Copy VG1930wm 1 60 11 PCB Layout Diagrams...
Page 64: ...ViewSonic Corporation Confidential Do Not Copy VG1930wm 1 61...
Page 65: ...ViewSonic Corporation Confidential Do Not Copy VG1930wm 1 62...
Page 66: ...ViewSonic Corporation Confidential Do Not Copy VG1930wm 1 63...