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To
prevent the Earth (or anything else) from permanently magnetizing
the CRT, all color monitors use a degaussing coil. A degaussing
coil is a demagnetizing coil that surrounds the outside of the picture
tube. The degaussing coil is powered by volts AC. The rapidly changing
field quickly demagnetizes the CRT by scrambling any molecules that
might be aligned through magnetic attraction.
But the degaussing
coil can't remain continuously energized while the monitor is in
normal operation. Disregarding the fact that it will burn-up if
left continuously energized, the magnetic field produced by the
coil will produce some radical distortion in the picture. Most monitors
use an ?automatic degaussing circuit to control the coil. The degaussing
coil is only activated when the monitor is first turned on, and
then only briefly at that.To reactivate the coil, the monitor must
be allowed to cool for ten to twenty minutes.
VRK spectrum
produce De Guassing Coil of television and pc monitor for the international
famous brand.
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