Sharp Aquos LC-52D64U keeps blowing fets

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  • Neonpeon
    Member
    • May 2012
    • 41
    • USA
    #1

    Sharp Aquos LC-52D64U keeps blowing fets

    I have a Sharp Aquos LC-52D64U that keeps blowing fet pairs on the inverters.
    I put in a new #3 inverter board, and it came up with a nice picture for a bit then blew the same pair on inverter board #1 across from it. I replaced these and it blew the same pair across from it on board #3.
    In the time it was up, I couldn't tell if any of the tubes were dead.

    Could this be a bad/shorted ccfl tube?
    Bad transformer?

    Any hints on how to test this. I have 2 more sets of good fets from the old inverter.
    Tags: None
    • freakaftr8
      Badcaps Legend
      • Oct 2012
      • 3743
      • USA
      #2
      Re: Sharp Aquos LC-52D64U keeps blowing fets

      I would check the transformers on that bank that runs those ccfls. Sounds like either a transformer issue or something else is bad on the inverters. Bad ccfls can be an issue. On sone sets if theee is a bad ccfl it goes into protection shutdown. I have seen broken ccfls cause some nasty symptoms if the shutdown circuit is not catching it in time.

      First ohm the transformers on the inverters for issues. Any one of them appear burned?
      Did I leave the soldering iron on?

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