Replacing only the bad ones.

[SonicSteve]

I have a question that I would love some experienced feedback on.

Lets say that for example there are 8 caps that are 2200uf 6.3v.
3 are bad and 5 appear good.
If you replace only the 3 bad how likely is it that the other 5 will die at a later date by the same buldging problem? I know they die after a given life cycle but I'm not including that kind of failure in this. Only ones that die prematurely due to buldging.

Anyone have any experience with this?

[Fatal0E]

Re: Replacing only the bad ones.

The other caps that you dont replace often fail very very soon after.

[Rainbow]

Re: Replacing only the bad ones.

Sometimes they're already bad, just not showing any signs. Or they will bulge a month later.

[SonicSteve]

Re: Replacing only the bad ones.

Awesome,
That's exactly what I suspected but hadn't confirmed or tested yet.
My practice has been to replace all caps of a certain value even if only one has failed. I did this because I suspected what you both said but I didn't know.
Thanks to both of you for your help.
Steve

[gonzo0815]

Re: Replacing only the bad ones.

This is the exact recomendation from most and the most quailified people here.

[tvtech]

Re: Replacing only the bad ones.

Replace all of the bad ones and any others like it,because sometimes caps do not show any signs of failure on the outside but when you open them up or do an esr test on them they are bad.The mostr common cap I have seen for this problem is yageo(look like teapos),they look fine on the outside but crack them open and you will find the paper/foil roll to be black and stinky.