"Samuel M. Goldwasser" wrote in message
...
Baron writes:

Michael Kennedy wrote:


"Baron" wrote in message
...
Michael Kennedy wrote:

I have had a chance to dig into this LCD projector that has been
producing ghost images.

I tried disconnecting all but one lcd panel inside the projector and
it produced an image which had a ghost image in the center but not
near the edges.

WAG. Could it just be a reflection due to grime on the face of the
panel ?

Thanks for the fast reply!

Hmm.. I don't think it is grime. The projector appears to be pretty
clean inside. My other projector has dust inside it you can foucus in
on. This one appears to be clean aside from one speck on the screen.

I had thought the problem might be electronic in nature and since this
thing has loads of electrolytics on I tried freezing them to see if it
would make
any difference. There was no aparrent effect on the image.
Unfortunately I can't check the ESR since I am on the other side of
the planet and my ESR meter is back home. I knew I should have broughtt
it with me.

Ah well. :-) I might have been lucky !

Can you swap drive among the panels? That might help to narrow it down
to the electronics, LCDs, or optics.

--

I think I've narrowed it down to the electronics.
A red full screen image has 4 or 5 1 pixel lines runing vertically on the
far right side of the screen. If you adjust the image location in the setup
for the projector these lines move with the image.

The same is true for green except the lines are on the left side of the
screen.

A blue image converges fine as along as all things are shades of blue. for
example blue background with light blue text.