Samsung Plasma advice please.

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  • habanerocat
    Senior Member
    • Nov 2014
    • 96
    • Ireland

    #1

    Samsung Plasma advice please.

    Hi I have two Samsung Plasmas with cracked screens.

    A PS43D450 and a PS42C450. Although the model numbers are similar the TV boards are quiet different.

    Anyway I have been searching patiently for a year or more for faulty TVs with good screens, so that I can swap some parts, but having no luck at all.

    The PS43D450 powers up, nothing on screen, no Samsung chime. TCon flashes on for about 4 sec off for 2. Test voltages rise and then fall.

    The PS42C450 powers up, screen flickers, good Samsung chime. TCon flashes on for about 4 sec off for 2. Test voltages rise and then fall.

    How confident can I be that the boards are good and that I can sell them? I just want them gone at this stage.
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Samsung Plasma advice please.

    Either may have bad buffer boards.

    You can test using this video:
    https://www.youtube.com/watch?v=51SZsfH60EY

    The other boards are probably ok, but it is hard to tell without an oscilloscope.
    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

    • habanerocat
      Senior Member
      • Nov 2014
      • 96
      • Ireland

      #3
      Re: Samsung Plasma advice please.

      Originally posted by tom66
      Either may have bad buffer boards.

      You can test using this video:
      https://www.youtube.com/watch?v=51SZsfH60EY

      The other boards are probably ok, but it is hard to tell without an oscilloscope.
      Thanks. I have an oscilloscope.
      If you could point me in the direction of another guide, that would be great.

      Comment

      • tom66
        EVs Rule
        • Apr 2011
        • 32560
        • UK

        #4
        Re: Samsung Plasma advice please.

        Is your scope a digital scope that can pause the waveform?

        If you post a picture of your Y-main I will show you where to probe.

        You need to be able to pause the waveform because there's a good chance the set will detect a fault due to the cracked panel and shut down. So you'll only get a few cycles of a waveform before it dies.
        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

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