19" LCD Color Monitor HP L1906
36
9.2.2 Power Board
1. No Power
Repeating the start voltage
Check D920 D921 ZD920…
Check IC902,IC903
Check Q910…OLP circuit
NG
OK
Check AC line volt 110V or 220V
OK
Check AC line
Check the voltage of C905(+)
Check F901, bridge rectified circuit
Check start voltage for the pin3 of IC901
Check R909, R910,IC931
Check the auxiliary voltage is between 10V-16V
Check IC901,T901
Check D906, IC904
OK
Check D902, D904, IC902
OK
NG
No power
NG
NG
OK
NG
To Next Page
Loading...
