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.

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    • CapLeaker
      Leaking Member
      • Dec 2014
      • 8186
      • 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
              • 6643
              • 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
                          • 6643
                          • 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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