46
No Backlight
Check C201 (+) =12V
NG
OK
Change F902
Check D201/Q209/Q210/
D202/Q211/Q212
Check ON/OFF signal
Check Interface board
NG
OK
Check U201 pin9=12V ?
NG
OK
Change Q201 or Q202
Check the pin1 of U201 have saw tooth wave
NG
OK
Change U201
Check D201(-), D202(-) have the output of square wave at short time.
NG
OK
CheckQ205/Q207/Q203/Q201or
/Q206/Q208/Q204/D202
Check the resonant wave of pin2 & pin5 for PT201/ PT202
NG
Check the output of PT201/PT202
Check Q209/Q210/C213 or Q211/Q212/C214
Check connecter & lamp
OK
NG
Change PT201/PT202
OK
Summary of Contents for AL1922
Page 1: ...0 Acer AL1922 Service Guide ...
Page 23: ...22 Rear Bezel Item Description 1 D SUB CABLE 2 DVI CABLE 3 AUDIO CABLE 4 AC POWER CORD ...
Page 27: ...26 II Dual Input Model Analog Signal Input III Dual Input Model Digital Signal Input ...
Page 34: ...33 Fig 4 Fig 5 ...
Page 35: ...34 Fig6 Fig 7 ...
Page 39: ...38 Fig13 ...