eMachines E181H Service Guide - Page 39

AOE191HQ&E181H, No power

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715G2510 1 AO(E191HQ&E181H) 1) No power Check L904 = 12V NG Check AC line volt 110V or 220V NG OK Check the voltage of C905 (+) Check AC input NG OK Check start voltage for the pin3 of IC901 NG OK Check the auxiliary voltage is bigger than 10V and smaller than 20V Change F901, Check BD901, IC901 Check R904, R932, R933, Change IC901 NG 1) Check IC901 OK 2) Check R909/D901 circuit Check IC901 pin8 PWM wave NG Check IC901 OK Check Q901/D903/IC903/ZD921/ZD922 39

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39
715G2510
1 AO(E191HQ&E181H)
1) No power
Check L904 = 12V
Check AC line volt 110V or 220V
Check AC input
Check the voltage of C905 (+)
Check start voltage for the pin3 of IC901
Check R904, R932, R933, Change IC901
NG
Check the auxiliary voltage is bigger than
10V and smaller than 20V
1) Check IC901
2) Check R909/D901 circuit
OK
OK
NG
Check Q901/D903/IC903/ZD921/ZD922
OK
Check IC901 pin8 PWM wave
OK
Check IC901
NG
NG
NG
OK
NG
Change F901, Check BD901, IC901