eMachines E181H Service Guide - Page 37

Power board

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5. Power board 715G2824 1C 2(E191W) 1. No Power No power Check to CN902 Pin3, 4 = 5 V OK NG Check AC line volt 120V or 220V OK NG Check the voltage of C905(+) OK NG Check Interface board Change F901, Check BD901, IC901 Check bridge retified circuit Check start voltage for the Pin3 of IC901 NG OK Change IC901 Check the auxiliary voltage is smaller than 20V NG OK Check IC901 Check T901,D906, D907,D908,Q903,ZD902,ZD903,IC903,IC904 37

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37
5. Power board
715G2824 1C
2(E191W)
1. No Power
Check to CN902 Pin3, 4 = 5 V
OK
Check Interface board
Check AC line volt 120V or 220V
Change F901, Check BD901, IC901
Check the voltage of C905(+)
Check
bridge retified circuit
Check start voltage for the Pin3 of IC901
Change IC901
OK
Check the auxiliary voltage is smaller than 20V
OK
NG
No power
NG
NG
OK
Check T901,D906, D907,D908,Q903,ZD902,ZD903,IC903,IC904
Check IC901
NG
OK
NG