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Fender Frontman 65r
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Okay so this thing has 40vDC on the output. I've narrowed it down a bit here but not sure what to do.
Q7 and Q9 are off. I know this because there is no voltage drop across Q7's R76, D19, and R78. There is no voltage drop across Q9's R80. Q8 is on as there is ~10vDC across R79. Q6 is on as there are v-drops across D18/20/21. R76, D19, R80, R78 are all good. There is no voltage drop across the diode string D24/25/26 also indicating that Q9 is off. So Q7 and Q9 are off but their diode junctions test good. If not for this forum I'd just replace 1 or both and see if that fixes it, but thought I'd see what yall think.
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