Philips 37PFL7662D/12 image degradation

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  • Dumah Brazorf
    Senior Member
    • Jun 2013
    • 179
    • Italy

    #1

    Philips 37PFL7662D/12 image degradation

    Hi.
    It works but sometimes the image goes crappy with color changing, fading and ghost effect expecially in the right side. Then it works again. Then crappy... Good image and bad image not seem perfectly separated. The issue seems not related to cold/hot. May be the t-con? Bad solder joints? Heat gun?
    I have a video of the behaviour of the tv. Can I link yt?

    EDIT: Some screenshots. In the first and last it works.
    Attached Files
    Last edited by Dumah Brazorf; 09-06-2013, 05:18 PM.
  • tom66
    EVs Rule
    • Apr 2011
    • 32560
    • UK

    #2
    Re: Philips 37PFL7662D/12 image degradation

    Very common issue, it is a tab bond problem. If you have not heard of it before:
    http://www.youtube.com/watch?v=xHst6pKLtTE
    (fault varies)
    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

    • Dumah Brazorf
      Senior Member
      • Jun 2013
      • 179
      • Italy

      #3
      Re: Philips 37PFL7662D/12 image degradation

      Thanks, didn't know the issue.
      I noticed that those 2 mini-boards seem bent just near the flexible cables. Those flex was blocked by coils glued (biadesive) to the frame. Now 3of4 are unsticked and i think because flexibles so squeezed between the two board and the glued coil act like a spring.
      I'll take some pics.

      Comment

      • Dumah Brazorf
        Senior Member
        • Jun 2013
        • 179
        • Italy

        #4
        Re: Philips 37PFL7662D/12 image degradation

        Confirmed.
        It's the first tab to the right looking at the screen.

        Comment

        • Dumah Brazorf
          Senior Member
          • Jun 2013
          • 179
          • Italy

          #5
          Re: Philips 37PFL7662D/12 image degradation

          Well. I'm trying different solutions.
          Plastic tubes not work, they deform after few on-off cycles due to the heat and stop to make pressure to the tab.
          Now i'm testing this:

          Comment

          • tom66
            EVs Rule
            • Apr 2011
            • 32560
            • UK

            #6
            Re: Philips 37PFL7662D/12 image degradation

            The typical fix that people use is part of the inner tube of a bicycle tyre, or the thermal pads that are found on the back of T-con and plasma sustain boards. Paperclips risk damaging the tab, I wouldn't recommend such use.
            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

            • Dumah Brazorf
              Senior Member
              • Jun 2013
              • 179
              • Italy

              #7
              Re: Philips 37PFL7662D/12 image degradation

              Thanks for you reply.
              I'm not using it as a paperclip but i bent it forming two legs that push against the metal frame.
              Obviously that part of the board is all tape insulated. It seems to work.
              I feel like MacGyver....

              Comment

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