17” LCD Color Monitor Wipro WLA171t
37
W / LED, No Backlight
Check CN102 pin12 =12V
NG
OK
Check adapter or MB
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
Check Q203/Q209/Q210/D201, Q204/Q211/Q212/D202
Check the resonant wave of pin2 & pin5 for PT201/PT202
NG
Check the output of PT201/PT202
Check Q209/Q210/C213,Q211/Q212/C214
Check connecter & lamp
OK
NG
Change PT201/PT202
OK
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