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LG Flatron W2343T-PF Invertor Transformer Getting Hot

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    LG Flatron W2343T-PF Invertor Transformer Getting Hot

    Hello, I am having a problem with my monitor. The invertor transformer is getting abnormally hot, the highest temperature i measured was 175°C. Nothing else on the board heats up. The monitor continues functioning but it smells really bad. I have already replaced the inverter transformer as it had a burnt primary winding. I also replaced all the capacitors but it still has a problem. Any help would be appreciated.

    #2
    Re: LG Flatron W2343T-PF Invertor Transformer Getting Hot

    It can be due to worn out CCFL so they draw too much current, you can try reducing the backlights level.
    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


      #3
      Re: LG Flatron W2343T-PF Invertor Transformer Getting Hot

      I have tested the transformer with another CCFL tube and it still heats up. Since I refuse to pay anymore money for this project since the monitor Is from the recycling center i will go there and take some inverter boards with me to take the parts of (mostly the blue high voltage capacitors)

      Comment


        #4
        Re: LG Flatron W2343T-PF Invertor Transformer Getting Hot

        I re-read your post:
        "I have already replaced the inverter transformer as it had a burnt primary winding."
        To burn out the primary winding that has to be lots of current and that can damage the MOSFET's that drive the transformer.
        Can I see good clear pictures of the board?
        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


          #5
          Re: LG Flatron W2343T-PF Invertor Transformer Getting Hot

          The power board is an AIP-0192 rev. F. The mosfets are Nikos P2504BDG and I measured them and it seems they are working alright. The driver chip is MP61093ES and it seems to be working too. One thing i noticed while taking these pictures Is that someone replaced the varistor.
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