Originally Posted by jwebb1970
Check the main Burn-In thread at the top of the RPTV threads page for info/advice from some who have been able to mostly reverse some burn-in issues.
The only "for sure" way to fix this, though, is by replacing CRTs. Not all 3 may be affected. Sometimes only one or 2 guns are "burnt". Not cheap, but likely still less that the cost of replacing the TV.
Right. Get a test pattern up there that fills the screen and go for the primary colors of R, G and B. That will tell you which guns are affected most. White is also suitable if you know your corrolary colors along with your primary's, and how to interpret what you are seeing.
On my year 2000 Panny, the green is the only one really affected. If I were to replace that one, it would be like new again, even after 6 years of use, as I bought it in 2001. It looks better than new right now 99% of the time, as we speak, except for the very light screenburn on green only, that is presently there.
If it were really noticeable, I would consider doing it myself, but it only shows up when a scene fades to white, or there is any all white picture up there. It shows white at the sides just fine, but the inner 4x3 section shows just a hint of magenta, rather than the white at the sides. It is so light that creating an inverse burn-in pattern to age the rest of the sides to match the center would definitely be a better way to go for me, than CRT replacement. After which I would simply realign the grayscale for higher age on the entire green screen now, rather than having the advanced aging just in the middle 4x3 section, which is what is going on right now. Mine is so light that realigning the grayscale once the aging has been evened out would prolly take 10 minutes, don't know about yours.
At 2 years old, if you do only 1 gun, under normal conditions that won't be enough age to cause an imbalance among the ages of the guns. As long as you can get a clean D6500K on your grayscale with a combo of old and new guns, and are not a Torch Mode fanatic - NO videophile is - and run your contrast at half or below at all times, replacing just one gun can be gotten away with.
If it gets to be so old that you are right on the edge of one of the guns not being able to keep up with the others, then replacing all 3 guns will have to be considered. But you should have no problem with yours, unless it has been the family baby sitter for 2 years, being on 16 hours a day on 4x3 at Torch Mode with black bars, and you intend to keep using it for that purpose. Gray bars are certainly better, but watch out for lines of demarcation where they don't exactly match the light level of the 4x3 section, or where the source is showing black lines between, which will also burn in, being fixed images.
Stretch mode to always keep the screen filled with moving video material is also invaluable, and if your set is the family baby-sitter, the kids prolly won't know the difference.
I sense that you are looking at changing your ways, now that you see what your set is capable of, involving HD. Could be that you didn't know how good it could look, CRT RPTVs were plentiful and not all that expensive, and you just didn't give it the careful treatment required to prevent screenburn on CRT sets.
Now's the time to change your ways, to put into practice what you have learned. Get your set regunned, retain ownership over a medium that is still the best out there and not easily replaced anymore, and get on with videophile viewing of HD on your CRT set.
I do all such CRT replacement and re-setup work, BTW. Whatever gun you get replaced will have to be re-setup - recalibrated - from scratch. If all 3 get replaced, the entire calibration will have to be done from scratch. VERY few repair techs know how to do this, you prolly won't find one locally who is capable of the calibration your set will need.
I, on the other hand, will fly to wherever I am needed, to do this work.