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Old 16th Jan 2021, 11:51 am   #5
Welsh Anorak
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Join Date: Apr 2005
Location: North Wales, UK.
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Default Re: Sony SL-C7 Rebuild: Alive for 20 Seconds Then ‘POP” & Smoke

Besides the obviously damaged parts, you need to replace the two small electroytics in the base circuit of the chopper transistors using new 105 degree parts by Panasonic or ones of similar quality. These will more than likely have caused the failure. The smoke will have come from the surge limiter resistor that usually survives.
As stated above, you'll need to source (and save up for!) genuine parts for both transistors - change them as a pair. Sonys (Sonies?) don't take kindly to pattern or equivalent parts.
If you're lucky and your spares machine has the fuse intact, then change those capacitors and any others that need it before fitting it. That might be your best option.
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