22” LCD Color Monitor Adelpia TGL2260A
37
8.2.2 Power Board
No power
Check bridge rectified circuit and F901 circuit
Check R904, R932, R933 and Change IC901
1) Check IC901,D901,C908
2) Check IC903 OVP circuit
Check CN902 pin10 = 12V
Check AC line volt 110V or 220V
Check AC input
Check the voltage of C905 (+)
Check start voltage for the pin3 of IC901
NG
Check the auxiliary voltage is bigger than
10V and smaller than 20V
OK
OK
NG
Check F903, Q903, D906, D905, T901, D915, ZD902, ZD922, IC903
OK
Check IC901 pin8 PWM wave
OK
Check IC901
NG
NG
OK
NG
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