HP P1110 Focus problem
 

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

Hello, !
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:

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, !
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
21" TFTs might be cheap enough to replace it.

With best regards, 3T39. E-mail:

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.

--

JANA
_____


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