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I have a centrex 80 cm model-CTT8009, turn it on it's fine but after a while the screen goes funny coloured. Can you tell me how to fix it myself or is it dead?

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  • Contributor
  • 33 Answers

Yes there is one thing you can do. I don't like to give out my tricks but will make an exception this time. You need a magnet from a microwave. They look like a donut and are a half inch thick. Take the magnet up to the effected area of the screen and only the effected area. Start real slow towards this area and get closer until the color is back to normal. It only takes a second to do this so be careful not to get to close to fast.

Posted on Sep 03, 2010

  • Demonic-2011
    Demonic-2011 Feb 23, 2011

    It might be the degaussing PTC - this little device has 2 - 3 pins on it, and is soldered to the board (usually near a fuse) inside the set. Sometimes these components don't function correctly for the size of tube used, hence the purity errors. Your tube is not being demagnetised properly by the internal degaussing posistor/PTC - identify its type number (not just circuit reference) and replace this part. It might also pay to have an expert electrically degauss your tube as well.

  • Demonic-2011
    Demonic-2011 Feb 23, 2011

    I doubt using a magnet near the picture tube would solve the problem in the long term.

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