Samsung LN40B500P3F with an odd problem

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  • budm
    Badcaps Legend
    • Feb 2010
    • 40746
    • USA

    #21
    Re: Samsung LN40B500P3F with an odd problem

    Here the test for check the winding resistance, they should be how they are setup for the pin outs, set meter to 2K OHMS scale. There are two set of high voltage windings on each transformer.
    Attached Files
    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

    • baitism
      Member
      • Apr 2013
      • 43
      • USA

      #22
      Re: Samsung LN40B500P3F with an odd problem

      1.5-1.6 for all of them.

      Comment

      • baitism
        Member
        • Apr 2013
        • 43
        • USA

        #23
        Re: Samsung LN40B500P3F with an odd problem

        I have an extra power board. Should I try swapping out some of the transformers?

        Comment

        • tom66
          EVs Rule
          • Apr 2011
          • 32560
          • UK

          #24
          Re: Samsung LN40B500P3F with an odd problem

          Originally posted by baitism
          I have an extra power board. Should I try swapping out some of the transformers?
          I would swap the entire board myself though it doesn't look like any transformers are bad.
          Please do not PM me with questions! Questions via PM will not be answered. Post on the forums instead!
          For service manual, schematic, boardview (board view), datasheet, cad - use our search.

          Comment

          • baitism
            Member
            • Apr 2013
            • 43
            • USA

            #25
            Re: Samsung LN40B500P3F with an odd problem

            I ordered a new board. The other one I have is some junk one the guy ordered from Hong Kong that came with busted capacitors. In the meantime, I would like to learn more about troubleshooting power supplies down to the component. Is there a good website to learn about that kind of stuff?

            Comment

            • baitism
              Member
              • Apr 2013
              • 43
              • USA

              #26
              Re: Samsung LN40B500P3F with an odd problem

              New PS board fixed it. Thanks for the help tom and bud!

              Comment

              • budm
                Badcaps Legend
                • Feb 2010
                • 40746
                • USA

                #27
                Re: Samsung LN40B500P3F with an odd problem

                Glad to hear! Did you do the xformer's resistance reading on the new 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

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