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Dell E173FP User Manual

Page 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

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