RCA RLDED3255a-blown inductor/coil

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  • tech2014
    Badcaps Veteran
    • Aug 2014
    • 807
    • Canada

    #1

    RCA RLDED3255a-blown inductor/coil

    I have an RCA 32" LED tv with no backlight. I did the flashlight test and there is video. I opened the tv and found a blown coil on the power supply. I can't find a replacement board for it. I inspected the back and the traces and pads are scorched but still good. I just have no idea what the value is of the inductor. I haven't measured anything to see what caused the blowup just want to know the value of the coil.

    Click image for larger version

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  • CapLeaker
    Leaking Member
    • Dec 2014
    • 7961
    • Canada

    #2
    Re: RCA RLDED3255a-blown inductor/coil

    Pic of the other side, please

    Comment

    • Brucy
      New Member
      • Nov 2016
      • 1
      • Canada

      #3
      Re: RCA RLDED3255a-blown inductor/coil

      Did you ever figure out the value? I'm in the same situation right now.

      Comment

      • dick_barton
        Badcaps Legend
        • Aug 2015
        • 6642
        • Wales

        #4
        Re: RCA RLDED3255a-blown inductor/coil

        The blown coil can probably be rewound by using enamelled wire of the diameter of that on the core and wind the same number of turns.

        The problem is to identify and correct what device failed, resulting in the coil heating.
        Willing to help but I'm no expert.

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA

          #5
          Re: RCA RLDED3255a-blown inductor/coil

          There is a thread about that burnt up inductor, the op had to get the new core due to the heat damage to the core, it changed its characteristic of the core and it becomes saturated easier.
          I need to search for that thread.
          Never stop learning
          Basic LCD TV and Monitor troubleshooting guides.
          http://www.badcaps.net/forum/showthr...956#post305956

          Voltage Regulator (LDO) testing:
          http://www.badcaps.net/forum/showthr...999#post300999

          Inverter testing using old CFL:
          http://www.badcaps.net/forum/showthr...er+testing+cfl

          Tear down pictures : Hit the ">" Show Albums and stories" on the left side
          http://s807.photobucket.com/user/budm/library/

          TV Factory reset codes listing:
          http://www.badcaps.net/forum/showthread.php?t=24809

          Comment

          • Andrew F. Ali
            Badcaps Legend
            • Jan 2014
            • 2450
            • Trinidad & Tobago

            #6
            Re: RCA RLDED3255a-blown inductor/coil

            Could be any one of those diodes near the burnt coil could be shorting...Check that e-cap too.

            Comment

            • dick_barton
              Badcaps Legend
              • Aug 2015
              • 6642
              • Wales

              #7
              Re: RCA RLDED3255a-blown inductor/coil

              Originally posted by budm
              There is a thread about that burnt up inductor, the op had to get the new core due to the heat damage to the core, it changed its characteristic of the core and it becomes saturated easier.
              I need to search for that thread.
              Thanks Budm, that does make sense that it would have an effect on the ferrite material properties.
              Willing to help but I'm no expert.

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #8
                Re: RCA RLDED3255a-blown inductor/coil

                https://www.badcaps.net/forum/showth...=inductor+core
                Never stop learning
                Basic LCD TV and Monitor troubleshooting guides.
                http://www.badcaps.net/forum/showthr...956#post305956

                Voltage Regulator (LDO) testing:
                http://www.badcaps.net/forum/showthr...999#post300999

                Inverter testing using old CFL:
                http://www.badcaps.net/forum/showthr...er+testing+cfl

                Tear down pictures : Hit the ">" Show Albums and stories" on the left side
                http://s807.photobucket.com/user/budm/library/

                TV Factory reset codes listing:
                http://www.badcaps.net/forum/showthread.php?t=24809

                Comment

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