Samsung ps50b451

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  • tschneeee
    Member
    • Jul 2014
    • 30
    • US

    #21
    Re: Samsung ps50b451

    I am having the same issue as wel..

    Comment

    • tom66
      EVs Rule
      • Apr 2011
      • 32560
      • UK

      #22
      Re: Samsung ps50b451

      You may check in circuit.
      Since the buffer is integrated, it will be necessary to locate the floating ground on the board. Could you post detailed pictures of the Y-main, as clear and focused as possible. Then you can check the ICs for shorts completely.
      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

      • sordids999
        Badcaps Legend
        • May 2013
        • 2149
        • uk

        #23
        Re: Samsung ps50b451

        hope there clear enough tom
        Attached Files

        Comment

        • sordids999
          Badcaps Legend
          • May 2013
          • 2149
          • uk

          #24
          Re: Samsung ps50b451

          plus more ive tried to split it up via pictures
          Attached Files

          Comment

          • finntricky
            Badcaps Veteran
            • Jan 2014
            • 449
            • uk

            #25
            Re: Samsung ps50b451

            here i have the same tv, but this one boots up with chime, when the Y-sus is unpluged,
            what was the out come of this thread,
            it seems to have stopped dead a year ago,

            Comment

            • Hamie
              Badcaps Legend
              • Apr 2014
              • 1383
              • UK

              #26
              Re: Samsung ps50b451

              Originally posted by finntricky
              here i have the same tv, but this one boots up with chime, when the Y-sus is unpluged,
              what was the out come of this thread,
              it seems to have stopped dead a year ago,

              Does it start up without the buffers connected?

              Comment

              • finntricky
                Badcaps Veteran
                • Jan 2014
                • 449
                • uk

                #27
                Re: Samsung ps50b451

                Originally posted by Hamie
                Does it start up without the buffers connected?
                yep, like i said get chime when y=sus unpluged, but just clicks when the y=sus is pluged back in, so defo y=sus fault, just a matter of finding it

                Comment

                • flocko
                  Badcaps Legend
                  • Nov 2012
                  • 1121
                  • uk

                  #28
                  Re: Samsung ps50b451

                  Have you done the buffer IC check ? check across the two big green resistors on the board near the buffer ICs if they are low ohms then you have blown ICs, and if you are not confident in replacing them you will need a new(S/H) board or to find someone that can do it for you, not a cheap job but then again replacement boards are not cheap either
                  Flocko

                  Comment

                  • finntricky
                    Badcaps Veteran
                    • Jan 2014
                    • 449
                    • uk

                    #29
                    Re: Samsung ps50b451

                    yep, green resistors check out ok

                    Comment

                    • flocko
                      Badcaps Legend
                      • Nov 2012
                      • 1121
                      • uk

                      #30
                      Re: Samsung ps50b451

                      And ribbon connectors to Vfg test Ok?if that's the case test all IGBTs /diodes and transistors on heat sinks if any IGBTs are faulty replace IGBT and drivers as well to be safe, look for repair kits they sometimes list the board placement numbers so a good place to start looking and testing. hope his helps Flocko

                      Comment

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