|
The high pitched whine sometimes heard from CRT type displays (TV's or computer monitors) is usually caused by the flyback transformer. This component is made of metal sheets laminated together with copper wires coiled around parts of it. The lamanint (sticky stuff that holds it all together) some times dries out and some of the metal plates are thus loosened just a tiny bit, allowing magnetic fields to cause them to vibrate causing the high pitched squeel.
I got this explanation a million years ago when I was doing electrical engineering studies in the Navy [img]smile.gif[/img]
Umm forgot to mention, this is usually a harmless effect, except for the insanity it drives some people to [img]smile.gif[/img] And should not affect the performance of the monitor unless it gets seriously bad, to the point where the transformer falls apart.
Also forgot to mention, the flyback transformer provides the really high voltage deflection current....I think...geez now I've forgotten... *sigh*
[ 09-12-2002, 12:40 PM: Message edited by: MagiK ]
|