Sony TV KDL46V4100

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  • hardcase1946
    New Member
    • Sep 2012
    • 3
    • USA

    #1

    Sony TV KDL46V4100

    I am trying to bring this TV (which got watered (don't ask)) back to life. I have taken the back off and dried out the set. When I plug the set in I can hear a sealed relay activate and relax about every 4 seconds. The green power light does come on with the pressing of the power button. I can see no other action back light, etc occurring. There is no audio. Please help.
  • Kent_Diego
    New Member
    • Jan 2012
    • 5

    #2
    Re: Sony TV KDL46V4100

    It has got to be something in the power supply. Seems they are easy to find:
    http://www.partstore.com/Part/Sony/S...furbished.aspx
    Try disconnecting the inverter board from the power supply and see if you get sound and the relay cycling stops. If so the inverter is bad:
    http://www.partstore.com/Part/Sony/S...04712/New.aspx
    I made a video on repairing switching power supplies that shows the inverter board too:
    http://www.youtube.com/watch?v=qJhkLiMR12g
    Report back your success.

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    • hardcase1946
      New Member
      • Sep 2012
      • 3
      • USA

      #3
      Re: Sony TV KDL46V4100

      I disconnected the inverter board with the same results. I also disconnected all of the other boards with the same results. I am of the opinion that the power supply is bad. I can see no bad caps so am wondering what components would cause this problem.

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      • hardcase1946
        New Member
        • Sep 2012
        • 3
        • USA

        #4
        Re: Sony TV KDL46V4100

        I finally discovered where the water got to. I found one dried stream with calcium deposits on the main board (A1506072C). The water came across several pins on the large IC and some pins on a smaller IC at the bottom of the board. It's hard telling what else got shorted out. Net research indicated that there are several versions of this board. How can I determine which version this board is?

        Comment

        • jaysonkurt
          New Member
          • Sep 2012
          • 5
          • philippines

          #5
          Re: Sony TV KDL46V4100

          having schematic diagram mo your tv will help you so much. you will also need to have special soldering tool to do it.

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