Dell E152FPc - Page 31

DELL E152FPc
32
8.2.2 PWPC BOARD
1.) No power

Check to CN102 Pin10 = 5V
Check Interface board
OK
NG
Check AC line volt 120V o
r
220V
NG
OK
Change F901
Check the voltage of C904(+)
Check bridge rectified circuit
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,Q903
2) Check Q901, Q902…OVP circuit
NG
OK
Check R919, D910,D911,D912,D913, ZD904