IPB540V2 bad psu

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  • llonen
    Badcaps Veteran
    • Sep 2014
    • 495
    • hampshire
    #1

    IPB540V2 bad psu

    Any thoughts on what this device was, the psu is from a bush 40inch set the board being IPB540V2. I am unable to locate a schematic for this supply, if any one has one that would be useful to me.

    The pcb legend indicates this to be a restive device and it is in series with the 240 volt line incomer to the board.

    Thanking you in advance
    Attached Files
    Tags: None
    • llonen
      Badcaps Veteran
      • Sep 2014
      • 495
      • hampshire
      #2
      Re: IPB540V2 bad psu

      any assistance please

        Comment

        • budm
          Badcaps Legend
          • Feb 2010
          • 40746
          • USA
          #3
          Re: IPB540V2 bad psu

          That is NTC for inrush current limiter. It can fail by itself due to heating and cooling cylce but from your pictures it looks like the load which is connected on the output side of the NTC may be shorted out.
          You need to upload the straight shot pictures for the top and the bottom side of the board.
          Typical value for the NTC is NTC-5D15 (5ohms at 25c, 15mm Dia.)
          You need to check out the bridge rectifier, MOSFET, etc.
          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

            • llonen
              Badcaps Veteran
              • Sep 2014
              • 495
              • hampshire
              #4
              Re: IPB540V2 bad psu

              Thank-you, I have been through the hot side of the supply and find surprisingly neither the bridge rectifier or mosfet(s) and or surrounding devices shorted.

              Pics of board as requested
              Attached Files

                Comment

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