AOC LM929 Bedienungsanleitung PDF herunterladen (Seite 36)

AOC LM929

8.2.2 Power/Inverter Board

1) No power

Check bridge rectified circuit and F901 circut

1) Check IC901

2) Check ZD901,Q902, Q903…OVP circuit

Check CN902 pin2, 4 = 12V

Check the voltage of C905(+)

Check start voltage for the pin3 of IC901

Check R906,R907 and Change IC901

Check the auxiliary voltage is bigger than

10V and smaller than 20V

Check Q901, R914,T901,D910,D911,ZD902

Check IC901

in8 PWM wave

Check IC901

Check AC line volt 110V or 220V

Check AC input

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AOC LM929 Bedienungsanleitung Seite 36