Amp blows mains fuse and lights up bulb limiter, A little in circuit troubleshooting shows both output mosfets shorted. I remove them, and sure enough, both are shorted every which way. Now the limiter doesn't light up, so I take it off it. My supplies are a little low at +/-38v and + 15.6 and -16.6v. They start out about .5 volt low and slowly climb to the max over several seconds.
So, I could use a little help here, as I have not ever been very good at this mosfet stuff. Questions are, why did both of them die? And what else should I be looking at? All the diodes quick check good in circuit.
Q1, 3 and 4 give good looking diode checks in circuit, no shorts.
https://ampeg.com/support/files/Sche...(103XXC_1).pdf
So, I could use a little help here, as I have not ever been very good at this mosfet stuff. Questions are, why did both of them die? And what else should I be looking at? All the diodes quick check good in circuit.
Q1, 3 and 4 give good looking diode checks in circuit, no shorts.
https://ampeg.com/support/files/Sche...(103XXC_1).pdf
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