I-Inc AG191D - 8.2.2 Power Board

19" LCD Color Monitor I-INC AG191D
37
8.2.2 Power Board
1) No power
Check CN902 pin 3/4=12V pin 7/8=5V
Check AC line volt 100-240V
Check AC input
Check the voltage of C907 (+)
Check bridge rectified circuit and F901 circuit
Check start voltage for the pin 8 of IC901
Check R905 and IC901
NG
Check the voltage of pin6 is bigger than
10V and smaller than 16V
Check IC901, D901, C911
OK
Check D920, D922, IC902, IC921, ZD921.ZD922
OK
NG
NG
OK
OK
NG
NG
Check Main board
OK
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