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Degaussing TV screen

Discussion in 'Electronic Repair' started by Peter Rossiter, Apr 26, 2004.

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  1. I am in the UK. Recently I moved my 19 inch Sony TV to another
    room. When I switched it on in its new location the TV had a
    colour fringe about two inches wide on the right hand side from the
    top to almost the bottom.

    I thought it would go away after switching the TV on & off a few
    times but it is still there after trying this over a period of
    about 30 minutes.

    I am no electronics expert but I think I need to degauss the
    screen.

    All I have got is an old fashioned tape head demagnetiser (for 1/4
    inch tape players). Can I use that to reduce the colour fringing?
    (I would not go too close because presumably the tape head
    demagnetiser has a very concentrated area of operation.

    Would I use it when the TV is on or off?
     
  2. Have you tried the TV in yet another location to see if the problem
    disappears? It's a stretch, but if you are in a steel-framed building
    that was ever hit by lightning, the girders may by magnetized. It'll
    take quite a degaussing coil to take care of that. :)

    Tom
     
  3. Ken Weitzel

    Ken Weitzel Guest

    Hi...

    A tape head degausser is much much too small. Not even
    worth trying, if anything it will make it worse.

    What concerns me is your mention of 30 minutes. The
    set's internal degaussing requires a complete cool
    down period before it will work again.

    Turn it off for a couple of hours; then on for a
    minute or two; then another rest for a couple of
    hours. Repeat several times.

    Take care.

    Ken
     
  4. Art

    Art Guest

    Highly probable components within the degauss control circuit have become
    marginal. The thermistor in the circuit is highly suspect. May want to have
    a tech have a go at your tele.
     
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