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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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Tweakers' Asylum Tweaks for systems, rooms and Do It Yourself (DIY) help. FAQ. |
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In Reply to: RE: Electrolytic listening test posted by beppe61 on July 15, 2014 at 09:58:29:
I would be very surprised if the power supply wasn't regulated. Even without a schematic, a circuit can often be sorted out by following the traces on the circuit board. Quite often they're laid out like this:Power transformer> diodes to rectify AC to DC> capacitors (usually banks of eletrolytics) to smooth DC >regulator(s) to control voltage etc. . Follow the traces after the 1N4007s and caps and I'd bet you find one or two regulators.
The 1N4007 (1000v PIV @ 1A) are pretty bad. "Bat Guano", Eli Duttman calls them. At the very least, replace them with UF4007. Even better would be the Cree 1200 PIV @ 2A. Link below.
As for the caps, I've had good luck with Panasonic FC, and the even lower ESR FM. I also like the Nichicon KW electrolytics.
Good luck.
Edits: 07/15/14
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Follow Ups
- RE: "Without schema i think i have no hope to understand the various parts function." - 1973shovel 11:10:39 07/15/14 (2)
- RE: "Without schema i think i have no hope to understand the various parts function." - beppe61 11:46:14 07/15/14 (1)
- You are welcome! (nt) - 1973shovel 05:55:33 07/16/14 (0)
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