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1.) No Power
Check to CN102 Pin1 and pin2 = 5V
O
Check AC line volt 120V or 220V
OK
Check the voltage of C905(+)
OK
Check start voltage for the pin3 of IC901
OK
Check the auxiliary voltage is smaller than 20V
OK
Check R919, D910,D911,D912,D913, ZD904
Power/Inverter Board
NG
NG
NG
NG
Repeating the start voltage
NG
Check Interface board
Change F901 , check BD901,Q903,IC901
Check bridge rectified circuit cFailure
Change IC901
1) Check IC902, IC903
2) Check Q901,Q902...OVP circuit
37
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