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Is this a symptom that my TV needs degaussing?

Discussion in 'Hobby Electronics' started by Pyrrhic, Jul 21, 2003.

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  1. Pyrrhic

    Pyrrhic Guest

    I have a 68cm Blaupunkt that's about 10 years old, and lately
    there's a patch of screen (top left) that's purplish - it's faint but it's
    there. I've been moving a lot of gear around in my living room in the last
    few weeks due to new carpets going down, and there's a large speaker to the
    side of the TV cabinet I've had to shift and replace a few times. The
    speaker cones themselves are very large and heavy so would have a fair
    magnetic field to maybe affect the TV - do you think the patch on the TV
    that's recently come up could be removed by degaussing the screen? Or does
    the patch mean my TV (only had it six months) is on the way to the tip? I
    know TVs don't last forever and a decade is a big slice of a TV's life, but
    it's a great set otherwise and is in great condition (teletext/stereo etc).


    Steve Knox
  2. Rod Speed

    Rod Speed Guest

    Very likely. Particularly as its showed up after moving things around.
    Very rare for TVs to fail like that. Its almost always an external
    field thats the problem, occasionally the internal auto degausser
    on turnon has had the thermistor fail, but thats not as likely given
    that the problem showed up with moving stuff around. Its possible
    its been dead for a while tho and you've only seen the effect of
    that when you moved the speakers around. You should be able
    to have that fixed cheaply, or just use an external degausser.
    Certainly worth getting it degaussed or even the thermistor replaced.
    It may not have died tho, it may not have ever had that much
    degaussing power and cant handle what those speakers produce.

    The Commodor 1701 monitors are absolutely notorious
    for that effect. Its no big deal when they are used as
    TV monitors coz you really only notice it on the blue
    screen when the VCR blanks the output etc.
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