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Posted to sci.electronics.repair
James Sweet
 
Posts: n/a
Default CRT screen burn in.

Dani wrote:
JVC rear projection T.V., less than one year old. Screen burn in on
both sides from customer using wrong aspect ratio. Only minor burn in.
I talked to JVC, of course not warranty, but how about "reverse burn
in"? Inputting an NTSC signal with white on both sides, to make the CRT
phosforus on the sides wear in to match the middle. JVC guy said they
have had no luck with this. Just wondering how, if any of you have
tried this. If so, what kind of signal, how long, & results. Thanks,
Dani.



You can try it, I'd use a signal from a computer but you'd better get
the alignment dead on or you'll have two vertical strips. If I were
attempting this I'd check the screen every hour or so for change, if you
crank the brightness and contrast up a bit it won't take real long with
it displaying white bars, but don't go up too high, I've seen a few
cracked PTV CRTs.