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17" LCD Color Monitor
AOC WA17W
35
8.2.2 Power/Inverter Board
(1) No power
Check CN902 pin4 = 5V
Check AC line volt 110V or 220V
Check AC input
Check the voltage of C907 (+)
Check bridge rectified circuit and F901 circuit
Check start voltage for the pin3 of IC901
Check R904, R932, R933 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 Q903, D906, D905, ZD902, ZD922, IC903
,
IC904
,
D907 and T901
OK
Check IC901 pin8 PWM wave
OK
Check D903, Q901 and change IC901
NG
NG
OK
NG
NG
Содержание WA17W
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Страница 45: ...17 LCD Color Monitor AOC WA17W 51 D901 093G 6038T52T FR103 715G2545 2 PWPC...