AOC 2212ph Service Manual page 36

22" LCD Color Monitor
8.2.2 Power/Inverter Board
1.) No power
Check CN902 pin1,2, 3 = 12V
NG
Check AC line volt 110V or 220V
OK
Check the voltage of C905 (+)
OK
Check start voltage for the pin8 of IC902
OK
Check the auxiliary voltage is bigger than
10V and smaller than 20V
OK
Check IC902 pin5 PWM wave
OK
Check IC902,IC903, Q903, D907, D905, ZD901
NG
Check AC input
NG
Check bridge rectified circuit and F901 circuit
NG
Check R904, R932, R933 and Change IC901
NG 1) Check IC901
2) Check IC901 ,D902,R909
NG
Check IC901
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AOC 2212ph