Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems.

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Default LCD Projector Ghosting

I have an Epson ELP-5000 Lcd projector that I picked up a couple of months
ago. It worked great for a while and then I started to notice that on of the
color channels was flickering rather fast and that was quite annoying... It
was only noticable on a white screen though. I thought I might have a loose
cable or something, but trying a different VGA cable didn't help anything.

More recently, the picture has started to ghost on all colors. The worst of
the effects are to the right and left fo the center. Horizontally it is not
affected, only vertically.

My first thoughts were that something has gone wrong in the convergence.
High ESR caps or something, but unfortunately my ESR meter is back in the
USA and I'm in Japan. So before I go to the trouble of buying or building a
new ESR meter. What would you guess is the problem?

Thanks,.
Mike


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Default LCD Projector Ghosting


the effects are to the right and left fo the center. Horizontally it is
not
affected, only vertically.


Sorry that was wrong...
I meant to say Vertically the screen is not affected but it is horizontally.
The closer you get to the left or right of the screen the worse the ghosting
gets. The picture is almost clear in the center, although there is some
slight gosting, it is very faint.


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Default LCD Projector Ghosting

Michael Kennedy wrote:
the effects are to the right and left fo the center. Horizontally it is
not
affected, only vertically.


Sorry that was wrong...
I meant to say Vertically the screen is not affected but it is horizontally.
The closer you get to the left or right of the screen the worse the ghosting
gets. The picture is almost clear in the center, although there is some
slight gosting, it is very faint.


On some projectors this is caused by heat warping various parts of the
imaging components. On at least one NEC model, it's the polarizing
filters that warp.

jak
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Default LCD Projector Ghosting


"jakdedert" wrote in message
...
Michael Kennedy wrote:
the effects are to the right and left fo the center. Horizontally it is
not
affected, only vertically.


Sorry that was wrong...
I meant to say Vertically the screen is not affected but it is
horizontally. The closer you get to the left or right of the screen the
worse the ghosting gets. The picture is almost clear in the center,
although there is some slight gosting, it is very faint.

On some projectors this is caused by heat warping various parts of the
imaging components. On at least one NEC model, it's the polarizing
filters that warp.

jak


Thanks for the reply Jak.

I had hoped to hear that the likely problem was electronic in nature rather
than mechanical. I've never taken a projector completely apart and honestly,
don't know what the filters look like or where they're located.

Are replacements easy to come by? I suppose I can live with it the way it
is.. I only paid about $65 for it (wokring properly) and the composit input
scaling sucks.

The only motivation I have to fix it is the hassle of disposing of things
here..


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Default LCD Projector Ghosting

Michael Kennedy wrote:
"jakdedert" wrote in message
...
Michael Kennedy wrote:
the effects are to the right and left fo the center. Horizontally it is
not
affected, only vertically.
Sorry that was wrong...
I meant to say Vertically the screen is not affected but it is
horizontally. The closer you get to the left or right of the screen the
worse the ghosting gets. The picture is almost clear in the center,
although there is some slight gosting, it is very faint.

On some projectors this is caused by heat warping various parts of the
imaging components. On at least one NEC model, it's the polarizing
filters that warp.

jak


Thanks for the reply Jak.

I had hoped to hear that the likely problem was electronic in nature rather
than mechanical. I've never taken a projector completely apart and honestly,
don't know what the filters look like or where they're located.

Are replacements easy to come by? I suppose I can live with it the way it
is.. I only paid about $65 for it (wokring properly) and the composit input
scaling sucks.

The only motivation I have to fix it is the hassle of disposing of things
here..


I only put that out as a possibility. There are projector forums
dealing specifically with such things. Google the model number.

jak


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Default LCD Projector Ghosting


"jakdedert" wrote in message
...
Michael Kennedy wrote:
"jakdedert" wrote in message
...
Michael Kennedy wrote:
the effects are to the right and left fo the center. Horizontally it
is not
affected, only vertically.
Sorry that was wrong...
I meant to say Vertically the screen is not affected but it is
horizontally. The closer you get to the left or right of the screen the
worse the ghosting gets. The picture is almost clear in the center,
although there is some slight gosting, it is very faint.
On some projectors this is caused by heat warping various parts of the
imaging components. On at least one NEC model, it's the polarizing
filters that warp.

jak


Thanks for the reply Jak.

I had hoped to hear that the likely problem was electronic in nature
rather than mechanical. I've never taken a projector completely apart and
honestly, don't know what the filters look like or where they're located.

Are replacements easy to come by? I suppose I can live with it the way
it is.. I only paid about $65 for it (wokring properly) and the composit
input scaling sucks.

The only motivation I have to fix it is the hassle of disposing of things
here..

I only put that out as a possibility. There are projector forums dealing
specifically with such things. Google the model number.

jak


Thanks Jak,

Unfortunately this is a Japanese model only available in Japan. Although it
makes sense since I'm in JP... Too bad I don't know more of the language I
could decipher what the google results were.

Mike


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Default LCD Projector Ghosting

On Feb 13, 12:48*pm, "Michael Kennedy"
wrote:
I have an Epson ELP-5000 Lcd projector that I picked up a couple of months
ago. It worked great for a while and then I started to notice that on of the
color channels was flickering rather fast and that was quite annoying... It
was only noticable on a white screen though. I thought I might have a loose
cable or something, but trying a different VGA cable didn't help anything..

More recently, the picture has started to ghost on all colors. The worst of
the effects are to the right and left fo the center. Horizontally it is not
affected, only vertically.

My first thoughts were that something has gone wrong in the convergence.
High ESR caps or something, but unfortunately my ESR meter is back in the
USA and I'm in Japan. So before I go to the trouble of buying or building a
new ESR meter. What would you guess is the problem?

Thanks,.
Mike


I just gave up on a Panasonic LCD projector with the same problem. The
service manual mentioned a software called "L701 zip Ver 1" used to
eliminate RGB ghosts. Hooks up via serial port. Tried hunting for the
same all over and came up with nothing. Loosening the LCD plates and
attemting to adjust convergence would'nt help cos il ater realised the
ghosts were prevalent in each of the 3 beams ( with 2 disconnected).
Does anyone have this software?
Jango.
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Default LCD Projector Ghosting

"Michael Kennedy" wrote in
:

Unfortunately this is a Japanese model only available in Japan. Although
it makes sense since I'm in JP... Too bad I don't know more of the
language I could decipher what the google results were.


http://babelfish.yahoo.com/



--
bz 73 de N5BZ k

please pardon my infinite ignorance, the set-of-things-I-do-not-know is an
infinite set.

remove ch100-5 to avoid spam trap
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