HP P1110 Focus problem

Hello, snipped-for-privacy@gmail.com! You wrote on 22 Jun 2005 11:55:59 -0700:

d> Only the vertical lines are out of focus, all colors and black. All d> else is great. d> Tried the digital setup after Password, and have opened the case but d> have not been able to figure out just what controls the focus. d> Thanks for looking, Richard

I think this is a badged SONY with the 21" Trinitron CRT . There is a focus control on the Lopt (line output transformer) Find a large wire with a big rubber ring where it attaches to the back of the CRT follow it down to the lopt and on the body of the lopt there should be two vertically mounted rotary controls, one is the screen Grid the other is the focus. These big sets sometimes have the focus control seperate from the lopt. BE AWARE THAT THE VOLTAGES AROUND THIS AREA ARE LETHAL. USE A LOOoooNG Insulated crosshead screwdriver. keep one hand in your pocket so you can't ground yourself. It's best to use a big mirror to check how your doing, because you really dont want to stretch around a big set like this with one hand in the HV just to see the screen. With best regards, 3T39. E-mail: snipped-for-privacy@hotmail.com

Actually most of them have two focus controls, one for verticasl lines and the other for the horizontal. Shouldn't be too hard to figure out which is which.

Problem is, if it drifted once it'll probably drift again. Sometimes it's not the fly, sometimes it's the CRT.

JURB

Hello, snipped-for-privacy@aol.com! You wrote on 22 Jun 2005 17:08:19 -0700:

Z> Problem is, if it drifted once it'll probably drift again. Sometimes Z> it's not the fly, sometimes it's the CRT.

Yep, very true, but I'd try a tweak first, it's often enough to last a while before component values drift again or the CRT loses it's oomph, and by then

With best regards, 3T39. E-mail: snipped-for-privacy@hotmail.com

In many of the Sony monitors, there are a set of focus pots. In most their models there is one for the vertical, and one for the horizontal plane. Use an insulated non metallic screwdriver to adjust these. If you are extremely careful, you can adjust these with your fingers, but take care not to accidentally touch anything.

If the focus has drifted out, there is a defect in the monitor. Either it is with the high voltage supply, or the CRT is starting to fail. These two types of failures are common in many of these monitors.