Sanken PSA10982J M Exploded Primary Capacitor

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  • mockingbird
    Badcaps Legend
    • Dec 2008
    • 5484
    • -

    #1

    Sanken PSA10982J M Exploded Primary Capacitor

    This PSU comes out of a Panasonic TC-20LA2 from around 2004. I repaired the inverter board by changing out one of the SOIC MOSFETs and a fuse a while ago thanks to information posted on this forum, but today, while in use, smoke started coming out of the set.

    Upon disassembly, this is what I found:







    Any ideas what could have caused this premature failure? I *think* the TV was still working when the set was smoking, but I'm not 100% sure.

    (Look at attachments to see higher resolution versions)
    Attached Files
  • cheapie
    null
    • Jul 2010
    • 849
    • USA

    #2
    Re: Sanken PSA10982J M Exploded Primary Capacitor

    Power surge? Fake cap? Rectifier problems?

    Comment

    • kc8adu
      Super Moderator
      • Nov 2003
      • 8832
      • U.S.A!

      #3
      Re: Sanken PSA10982J M Exploded Primary Capacitor

      is the board dark under it or is that a shadow?
      overvoltage like a high neutral?

      Comment

      • mockingbird
        Badcaps Legend
        • Dec 2008
        • 5484
        • -

        #4
        Re: Sanken PSA10982J M Exploded Primary Capacitor

        Nope no power surge AFAIK, and that's just a shadow...

        Comment

        • mockingbird
          Badcaps Legend
          • Dec 2008
          • 5484
          • -

          #5
          Re: Sanken PSA10982J M Exploded Primary Capacitor

          Ok, I got a confirmation that the set was working while the smoke was coming out of the capacitor... I'll probably replace the bridge rectifier anyways with a better brand just to be safe eventhough it does not measure short as far as I can tell. Anyone have any theories?

          Comment

          • goontron
            5000!
            • Dec 2011
            • 4108
            • US

            #6
            Re: Sanken PSA10982J M Exploded Primary Capacitor

            Originally posted by mockingbird
            Ok, I got a confirmation that the set was working while the smoke was coming out of the capacitor... I'll probably replace the bridge rectifier anyways with a better brand just to be safe eventhough it does not measure short as far as I can tell. Anyone have any theories?
            internal short in the cap or a failing diode in the bridge?
            I've had diodes test good on the LV that a DMM uses but goes short on mains voltage.
            Things I've fixed: anything from semis to crappy Chinese $2 radios, and now an IoT Dildo....

            "Dude, this is Wyoming, i hopped on and sent 'er. No fucking around." -- Me

            Excuse me while i do something dangerous


            You must have a sad, sad boring life if you hate on people harmlessly enjoying life with an animal costume.

            Sometimes you need to break shit to fix it.... Thats why my lawnmower doesn't have a deadman switch or engine brake anymore

            Follow the white rabbit.

            Comment

            • ben7
              Capaholic
              • Jan 2011
              • 4059
              • USA

              #7
              Re: Sanken PSA10982J M Exploded Primary Capacitor

              Maybe just age and heat?

              Could also be a random failure, which does happen once in a while.
              Muh-soggy-knee

              Comment

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