(Topic ID: 275709)
Linked Games
Earthshaker
Williams, 1989
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3 weeks later
Quoted from In99flames:found an open resistor at R9.
From manual it looks that R9 is used for sol#15 "low PF G.I. relay" . Think that the drive transistor Q14 was shorted and kept the relay powered ON and cooked the resistor R9.
But I'm not sure because manual and interpretation can be wrong.
To be sure, check which transitor is connected to R9.
Quoted from In99flames:what about the large 30000uf cap in the backbox
Quoted from In99flames:Sometimes I cannot get it to boot unless i turn it on or off 3 or 4 times.
More likely it were the smaller caps C7 and C8 on the power supply going out of spec.
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