CurtPalme.com Home Theater Forum

[jeffslife]

Me again,
I know, I know I cant leave well enough alone.
The issue at hand is I have One curved line from each color at the top of my screen.
I never noticed it until i shrunk the picture to watch football on sunday.
When I go back to the correct size for 16:9 and stretch the picture back to fit the screen it is pushed out of the top
of the picture and is unnoticable.I know, so whats the problem right?
when I look into the lens i can see the line arching in each lens.
It is almost like one line of the actual picture is separted from the rest of the picture.
I guess what really bothers me is this, could this line (that never seems to move) create phosphur burn in my tubes?
Any ideas on what I did wrong on the setup to cause this problem?
how do I fix it?
keep in mind I'm a complete idiot and need things spelled out.

[Ile]

I guess it's AKB line that projector use for automatic black level adjustment, that should compensate tube voltages when tubes worn. It's projected during blanking interval, so it wont affect to picture and it's separated from rest of picture.

Newer seen tube that have AKB line burned in, so don't worry.