Dell E173FP Service Manual - Page 32
Power/Inverter Board, No power
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UPC - 008888306979
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8.2.2 Power/Inverter Board 1.) No power DELL E173FP Service Manual Check to CN102 Pin9 and pin10 = 5V NG OK Check AC line volt 120V or 220V Check Interface board NG Change F901 , check BD901,Q903,IC901 OK Check the voltage of C904(+) NG OK Check bridge rectified circuit cFailure point Check start voltage for the pin3 of IC901 NG Change IC901 Repeating the start voltage Check the auxiliary voltage is smaller than 20V OK NG 1) Check IC902, IC903 2) Check Q901,Q902...OVP circuit Check R919, D910,D911,D912,D913, ZD904 32
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DELL E173FP Service Manual
32
8.2.2 Power/Inverter Board
1.) No power
Check to CN102 Pin9 and
pin10 = 5V
Check Interface board
OK
NG
Check AC line volt 120V or 220V
NG
OK
Change F901 , check BD901,Q903,IC901
Check the voltage of C904(+)
Check bridge rectified circuit
cFailure point
NG
OK
Check start voltage for the pin3 of IC901
Change IC901
NG
Repeating the start voltage
Check the auxiliary voltage is smaller than 20V
1) Check IC902, IC903
2) Check Q901,Q902…OVP circuit
NG
OK
Check R919, D910,D911,D912,D913, ZD904