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MagicSmoke 01-18-2018 05:43 AM

JVC tv Power Supply Caps Question
Received a free JVC tv, would not power on. Testing revealed startup cap for stby volts bad, a 1uf 50v Lelon electrolytic. Replaced the one cap and all is good, tv now works.

My question is would it be a good measure to replace all of the caps on the psu, it has a mixture of Nichions and Lelons for more longevity? It was manufactured in 2008.

Andrew F. Ali 01-18-2018 06:39 AM

Re: JVC tv Power Supply Caps Question
If you have an ESR Meter you could probably check ALL the e-caps on the PSU and if they are doubtful then replace them, as preventative maintenance. However, if your set works why interfere with it, running the risk of cracking joints, installing caps wrong, shorting joints or breaking the board. My advice, Let sleeping dogs lie.

sam_sam_sam 01-20-2018 10:44 PM

Re: JVC tv Power Supply Caps Question
Or you take the view that any cap that under 100uf replace it just because the small diameter caps dry out faster than the bigger ones do

Now if were me and the caps brands that have a tendency to be bad and ones that you replace on site when you see them ( Lelons ) for me this is a brand when I see them I replace them

Most of the time I just recap it and be done with it

But I would not be in a hurry doing this job for the reasons given by Ali in the post above

MagicSmoke 01-21-2018 12:10 AM

Re: JVC tv Power Supply Caps Question
There are only 5 of the Lelons on the board. The rest are Rubycons, or UCC.

I think I will replace the lelons and leave the others alone. Have done other cap replacements so no problems there. Thanks.

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