Nichicon PC(M) replacement

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  • BigTroll
    Badcaps Legend
    • Sep 2010
    • 1317
    • LAMBDA SOND
    #1

    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?
    Attached Files
    Last edited by BigTroll; 02-21-2021, 11:27 PM.
    My Computer: AMD Ryzen 9 3900X, Asrock X370 Killer SLI/AC, 32GB G.SKILL TRIDENT Z RGB DDR4 3200, 500GB WD Black NVME and 2TB Toshiba HD,Geforce RTX 3080 FOUNDERS Edition, In-Win 303 White, EVGA SuperNova 750 G3, Windows 10 Pro
    Tags: None
    • BigTroll
      Badcaps Legend
      • Sep 2010
      • 1317
      • LAMBDA SOND
      #2
      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?
      Attached Files
      My Computer: AMD Ryzen 9 3900X, Asrock X370 Killer SLI/AC, 32GB G.SKILL TRIDENT Z RGB DDR4 3200, 500GB WD Black NVME and 2TB Toshiba HD,Geforce RTX 3080 FOUNDERS Edition, In-Win 303 White, EVGA SuperNova 750 G3, Windows 10 Pro

        Comment

        • Per Hansson
          Super Moderator
          • Jul 2005
          • 5895
          • Sweden
          #3
          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.
          "The one who says it cannot be done should never interrupt the one who is doing it."

            Comment

            • mockingbird
              Badcaps Legend
              • Dec 2008
              • 5484
              • -
              #4
              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://www.badcaps.net/forum/attach...1&d=1614021069
              Attached Files

                Comment

                • BigTroll
                  Badcaps Legend
                  • Sep 2010
                  • 1317
                  • LAMBDA SOND
                  #5
                  Re: Nichicon PC(M) replacement

                  Originally posted by mockingbird
                  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://www.badcaps.net/forum/attach...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!
                  My Computer: AMD Ryzen 9 3900X, Asrock X370 Killer SLI/AC, 32GB G.SKILL TRIDENT Z RGB DDR4 3200, 500GB WD Black NVME and 2TB Toshiba HD,Geforce RTX 3080 FOUNDERS Edition, In-Win 303 White, EVGA SuperNova 750 G3, Windows 10 Pro

                    Comment

                    • stj
                      Great Sage 齊天大聖
                      • Dec 2009
                      • 30950
                      • Albion
                      #6
                      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?

                        Comment

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