AOC Adelpia TGL2010A Service Manual page 36

20" LCD Color Monitor
1.) No power
Check CN903 pin6 = 12V
NG
Check AC line volt 110V or 220V
OK
Check the voltage of C905 (+)
OK
Check start voltage for the pin8 of IC901
OK
Check the auxiliary voltage is bigger than
10V and smaller than 20V
OK
Check IC901 pin6 PWM wave
OK
Check F902, F905, Q901, D901, T901, D908, D909, ZD903, ZD904, IC901
NG
Check AC input
NG
Check bridge rectified circuit and F901 circuit
NG
Check R904, R932, R933 and Change IC901
NG 1) Check IC901,D902,C908
2) Check IC903 OVP circuit
NG
Check IC901
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Adelpia TGL2010A