eMachines E161HQ Service Guide - Page 41

E161HQ, No power

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715G2852 2(E161HQ) 1) No power Check CN902 PIN4,5 = 5V NG Check AC line volt 110V or 220V NG OK Check the voltage of C907 (+) Check AC input NG OK Change F901, Check BD901, IC901 Check start voltage for the pin3 of IC901 NG OK Check R904, R932, R933, Change IC901 Check the auxiliary voltage is bigger than 10V and smaller than 20V NG 1) Check IC901 OK 2) Check R909/D901 circuit Check IC901 pin8 PWM wave OK NG Check IC901 Check Q901/D903/IC902/D906/D907/ZD923 41

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41
715G2852
2(E161HQ)
1) No power
Check CN902 PIN4,5 = 5V
Check AC line volt 110V or 220V
Check AC input
Check the voltage of C907 (+)
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/IC902/D906/D907/ZD923
OK
Check IC901 pin8 PWM wave
OK
Check IC901
NG
NG
NG
OK
NG
Change F901, Check BD901, IC901