Power/Inverter Board - HP f1905 Series Service Manual

9.2.2 Power Board
No Power
Check AC line volt 110V or 220V
Check the voltage of C904(+)
Check start voltage for the pin3 of IC901
Check the auxiliary voltage is between 10V-16V
Check D903, D907,
No power
NG
OK
NG
OK
NG
OK
NG
OK
Check AC line
Check F901, bridge rectified circuit
Check R912, R916, R918, IC901
Check IC901,T901
Check ZD901, D909
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HP f1905 Service Manual