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19" LCD Color Monitor AOC 919Swa
33
9.2.2 Power Board
1. No Power
Check ZD902 = 16V
Check AC line volt 110V or 240V
Check AC input
Check the voltage of C905(+)
Check bridge rectified circuit and F901 circuit
Check start voltage for the pin3 of IC901
Check R904,R905,R906 and Change IC901
NG
Check the auxiliary voltage
1) Check IC901,T901
2) Check OVP circuit
OK
OK
NG
Check IC903,IC904,Q901,D906,D907
OK
Check IC901 pin8 PWM wave
OK
Check IC901
NG
NG
NG
OK
NG