ISO-P500SPP Passive PFC capacitors

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  • Devis
    New Member
    • Jul 2011
    • 2
    #1

    ISO-P500SPP Passive PFC capacitors

    Hi all.
    I've a problem with my old Sunny Technologies PSU (model ISO-P500SPP). After it didn't power on anymore, I opened it and saw that a capacitor mounted in passive PFC board was exploded, a fast diode beside it was in short circuit and fuse was blown. I replaced fuse and diode (FR157).
    I replaced capacitors too (marked Teapo 2,2uF 400V SEK105°C) with two 450V 85°C capacitors, but after a while they went in leakage another time. I'd like to ask you if I'd need to use low ESR or any other special type of electrolytic capacitors.
    I attach a part of schematic I designed about PFC part.
    Thanks in advance for any help
    Have a good day, Devis
    Attached Files
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    • lti
      Badcaps Legend
      • May 2011
      • 2545
      • United States
      #2
      Re: ISO-P500SPP Passive PFC capacitors

      How long did it last before the replacement caps blew?

        Comment

        • goodpsusearch
          Badcaps Legend
          • Oct 2009
          • 2848
          • Greece
          #3
          Re: ISO-P500SPP Passive PFC capacitors

          Just remove those caps and disable that part of the circuit. This is my treatment to this problem:

          https://www.badcaps.net/forum/showth...?t=8171&page=6

            Comment

            • momaka
              master hoarder
              • May 2008
              • 12164
              • Bulgaria
              #4
              Re: ISO-P500SPP Passive PFC capacitors

              Originally posted by goodpsusearch
              Just remove those caps and disable that part of the circuit. This is my treatment to this problem:

              https://www.badcaps.net/forum/showth...?t=8171&page=6
              +1
              This PPFC is technically supposed to boost efficiency a little bit when the PSU is off. In reality, though, it wastes A LOT more power than it saves. This can be quite evident by the heat it outputs.

              Like goodpsusearch said, just disable/remove it. Getting rid of the capacitors is sufficient, but if you want to add some spare resistors and diodes to your junk box, remove the FR157 diodes and 2W resistors as well.

                Comment

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