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Old 02-21-2021, 11:23 PM   #1
BigTroll
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Default Nichicon PC(M) replacement

Hello, Iam working on my dads EEC-IV computer from his 94 Lightning Pickup, it has bad nichicon PC(M) 2x47uf 16v and 1 10uf 63v what would be a decent replacement? I noticed Panasonic makes the General purpose NHG series any they are rated to 105c whould those be okay?

also on the bottom left of the board capacitor I see I guess a diode or something, it has no markings and had electrolite under it which i cleaned, did that cap possibly short it out?
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Old 02-22-2021, 09:20 AM   #2
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Default Re: Nichicon PC(M) replacement

Heres a picture of the bad cap next to what I think is a diode? I see a black pool under it but is that electrolyte from the cap or the diode?
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Old 02-22-2021, 12:53 PM   #3
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Default Re: Nichicon PC(M) replacement

It could be glue but then you would expect the same under other components so I guess not.
It looks like the board is conformally coated, maybe the electrolyte somehow dissolved that and created that mess...
As for the cap choice I don't know because I did not find a datasheet for the Nichicon PC.
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Old 02-22-2021, 01:11 PM   #4
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Default Re: Nichicon PC(M) replacement

Here is a datasheet for Nichicon PC...

If you want to be strict about it, you could use an automotive-grade cap like RX30 or similar.

https://badcaps.net/forum/attachment...1&d=1614021069
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Old 02-22-2021, 10:03 PM   #5
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Default Re: Nichicon PC(M) replacement

Quote:
Originally Posted by mockingbird View Post
Here is a datasheet for Nichicon PC...

If you want to be strict about it, you could use an automotive-grade cap like RX30 or similar.

https://badcaps.net/forum/attachment...1&d=1614021069
I found these but 50v vs 16v for the original capacitance is the same.
https://www.mouser.com/ProductDetail...ysgx62ww%3D%3D

I also found some guy trying the WURTH alluminum polymer caps, would those be a better choice since they wont ever leak again or would you go with the rubycons? Thank you for the help!
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Old 02-23-2021, 04:57 AM   #6
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Default Re: Nichicon PC(M) replacement

i would try to see what the caps do.
are they just smoothing dc, or on a dc/dc convertor output? or signal blocking?
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