EEVblog Electronics Community Forum
Electronics => Beginners => Topic started by: vodka on September 03, 2016, 05:40:05 pm
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Yesterday , i was searched a capacitor on a lunchbox where i keep all huge capacitor from old PCB scraping.
I found almost all capacitor coated with a sticky liquid that i think that is electrolytic
Today , i decided to clean and testing the capacitors and i found 7 suspects and 5 deads(without external evidence).
Of the suspects, i have seen that practically there aren't nothing ,only i can see a few very small drops on the bottom capacitors that i don't know if is a leakage or a dry electrolytic.
But the more strange is that the lunchbox was quite dirty of electrolytic.
Where has it gone out so much electrolytic ,when i haven't found any hole or slice on the capacitors ? :-//
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The capacitors were most likely leaking from the bottom bung used to seal the bottom of the capacitors. I've seen this in a few bad power supplies I've repaired. Some of the cheaper capactors use a natural rubber rather than a synthetic one that can shrink over time and lose a good seal. The shrinkage of the rubber probably wouldn't be too obvious other than leaking electrolyte
My guess anyways