Fuzzy/snowy picture - Samsung Plasma TV

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  • saeed19
    New Member
    • May 2015
    • 2
    • United States
    #1

    Fuzzy/snowy picture - Samsung Plasma TV

    I found this TV next to a dumpster. We fixed it by replacing the X and Y sustaining boards and it was working perfectly for a couple of minutes until steam started to rise from the top, while the cover was still off. We turned the TV off. After it cool down, we turned it on and now the screen has black on the top and bottom, and there is a burn in after a change of scene. The rest of the picture is snowy. We are using the HDMI input from a laptop.

    https://www.dropbox.com/s/7s3npdveey..._4792.MP4?dl=0
    Tags: None
    • Hamie
      Badcaps Legend
      • Apr 2014
      • 1383
      • UK
      #2
      Re: Fuzzy/snowy picture - Samsung Plasma TV

      Looks like the x-main has failed.

        Comment

        • ellah
          New Member
          • May 2015
          • 9
          • Poland
          #3
          Re: Fuzzy/snowy picture - Samsung Plasma TV

          I got similar problem, is it usually x and y board causing this?

            Comment

            • Hamie
              Badcaps Legend
              • Apr 2014
              • 1383
              • UK
              #4
              Re: Fuzzy/snowy picture - Samsung Plasma TV

              Most commonly it'll be the X.
              Youd need to get the y waveform to be 100% positive.

                Comment

                • Alastair E
                  Chief Womble
                  • Mar 2013
                  • 1963
                  • U.K.
                  #5
                  Re: Fuzzy/snowy picture - Samsung Plasma TV

                  First things first--Before dragging Scopes out and all that!

                  Check ALL the Voltage Supplies such as Vs, Va, VSC, -Vy, Ve/V-ZBias etc....

                  ANY missing/wrong and those should be investigated.

                  From the description--I'm suspecting a VSC/-Vy fault, as it has slow refresh/image-retention

                  You also dont mention the Model Number of the set. Good quality Pictures of all the boards in the set can help too.....
                  Last edited by Alastair E; 05-11-2015, 03:36 AM.
                  TELEFIX

                  How PLASMA SCREENS WORK, X-SUS and Y-SUS what they do--
                  http://www.irf.com/technical-info/appnotes/an-1088.pdf
                  PLEASE DO NOT EMAIL ME PRIVATELY FOR REPAIR ADVICE. QUESTIONS BELONG ON THE FORUM!

                    Comment

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