HannStar HQ171D Service Manual page 50

H a n n S t a r D i s p l a y C o r p .
Document Title
Document No.
11.2.2 Power Board
1) No power
Check CN902 pin 3/4=12V pin 7/8=5V
Check AC line volt 100-240V
Check the voltage of C907 (+)
Check start voltage for the pin 8 of IC901
Check the voltage of pin6 is bigger than
10V and smaller than 16V
Check D920, D922, IC902, IC921, ZD921.ZD922
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HQ171D_XY _HSM
OK
NG
NG
OK
NG
OK
NG
OK
NG
OK
Check Main board
Check AC input
Check bridge rectified circuit and F901 circuit
Check R905 and IC901
Check IC901, D901, C911
Page No. 50 50 / 87
Revision
07/08/09