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/diy/ - Do It Yourself

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>> No.1578718 [View]
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1578718

I've got a QRX9001 quad amp that was left to rot in a garage for an untold number of years. It's been on my todo shelf for a while and I'd like to get to it this summer. When I had first gotten it I, probably foolishly, tried to plug it in and turn it on. It was initially set to 220V, I didn't see that and plugged it into 120V briefly before changing the setting. I don't know if that would have caused horrendous damage but hopefully not. If I recall, once I had it configured correctly the face lights came on and there was some quiet crackling noise through the headphone jack and maybe in the speakers. I've got myself a function generator+oscilloscope, multimeter, soldering iron, lab power supply, and little experience with this sort of work. How should I get started debugging this thing?

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