AOC 177Pk, Service Manual, Page: 37 / 72

17" LCD Color Monitor AOC 177Pk
37
8.2.2 Power/Inverter Board
(1) No power
Check CN902 pin3/4 = 12V
Check AC line volt 110V or 220V
Check AC input
Check the voltage of C910 (+)
Check bridge rectified circuit and F901 circuit
Check start voltage for the pin8 of IC901
Check R911, C910 and Change IC901
NG
Check the auxiliary voltage is bigger than
10V and smaller than 20V
1) Check IC901
2) Check IC901 over current protect circuit
OK
OK
NG
Check Q900, D916, D915, ZD921, ZD922, IC902 and T901
OK
Check IC901 pin5 PWM wave
OK
Check IC901
NG
NG
NG
OK
NG