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- Path: sparky!uunet!news.tek.com!tekig7!tekig5!drchambe
- From: drchambe@tekig5.pen.tek.com (Dennis Chamberlin)
- Newsgroups: comp.sys.mac.hardware
- Subject: Re: Magnetized Monitor = Junk ?
- Message-ID: <8149@tekig7.PEN.TEK.COM>
- Date: 5 Jan 93 16:23:14 GMT
- References: <16B4D101F.LILMARA@YaleVM.YCC.Yale.Edu>
- Sender: news@tekig7.PEN.TEK.COM
- Reply-To: drchambe@tekig5.pen.tek.com (Dennis Chamberlin)
- Organization: Tektronix, Inc., Beaverton, OR.
- Lines: 23
-
- In article <16B4D101F.LILMARA@YaleVM.YCC.Yale.Edu> LILMARA@YaleVM.YCC.Yale.Edu (Martin Lilly) writes:
- >My adventurous daughter wanted to see if our beautiful 13" Trinitron monitor
- >was magnetic- she touched a moderately powerful magnet to the screen and it now
- >has 4 large, ugly blotches on it.
- >
- >Is my $600 investment shot?
-
- There is a possibility that the internal degauss system is not up to the task.
- Monitors can often be externally degaussed using a degauss coil more powerful
- than those that are built in to the monitor. The coil is a simple device and
- amounts to little more than about a 1 foot or so diameter coil of wire that
- carries line AC current. One could be built for a few dollars, but I suspect
- that most monitor/TV service shops have one.
-
- If you decide to do it yourself, two things to be careful of:
- The coil should have enough impedance to limit the current to values that
- will avoid popping circuit breakers or rapidly overheating the coil. Add turns
- if necessary.
-
- Don't turn the coil on or off while it is near the monitor. This will aggravate the problem you are trying to cure.
-
- Of course, do this well away from your drives and store of floppy discs.
-
-