PIONEER SA-7800 ( NEEDS REPAIR!!!)

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I can’t find the problems with this amplifier his power supply doesn’t work at all and I don’t know if I replace the relay or the power capacitors,So guys if you have theory how to fix the pioneer SA-7800 power supply just leave by the comment section and that would be appreciated.Thanks!!!
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If it's turning on then the power supply is working, I would guess that there something wrong in the amp circuit or in the pre amp. It's at the age where the caps are starting to drift and the small transistors can be starting to get noisy

jamescoulter