Hanns.G AG172D Service Manual page 38

17" LCD Color Monitor
8.2.2 Power Board
1) No power
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Check CN902 pin 3/4=12V pin 7/8=5V
NG
Check AC line volt 100-240V
OK
Check the voltage of C907 (+)
OK
Check start voltage for the pin 8 of IC901
OK
Check the voltage of pin6 is bigger than
10V and smaller than 16V
OK
Check D920, D922, IC902, IC921, ZD921.ZD922
manuals search engine
OK
Check Main board
NG
Check AC input
NG
Check bridge rectified circuit and F901 circuit
NG
Check R905 and IC901
NG
Check IC901, D901, C911
38
Hanns.G AG172D