AOC 919SWA manual Power Board, LCD Color Monitor, AOC 919Swa, No Power

19" LCD Color Monitor

9.2.2Power Board

1. No Power

Check ZD902 = 16V

NG

Check AC line volt 110V or 240V

NG

OK

Check the voltage of C905(+)

NG

OK

Check start voltage for the pin3 of IC901

NG

OK

Check the auxiliary voltage

NG

OK

Check IC901 pin8 PWM wave

NG

OK

Check IC903,IC904,Q901,D906,D907

AOC 919Swa

Check AC input

Check bridge rectified circuit and F901 circuit

Check R904,R905,R906 and Change IC901

1)Check IC901,T901

2)Check OVP circuit

Check IC901

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