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Projector problems

Posted on 2007-04-06
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Last Modified: 2013-11-08
I have a Polaroid LCD projector 211 and it seems to have a problem. I believe the colors are off. I don’t’ think it has anything to do with the inputs, as they all work and the problem is the same no matter what source it comes from. I have some pictures here….

http://i25.photobucket.com/albums/c68/afries/DSCN3335.jpg

http://i25.photobucket.com/albums/c68/afries/DSCN3336.jpg

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Question by:Afries52
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by:Mark
ID: 18868212
This projector has three lcd panels that project each primary color(RGB). This image shows that they are not aligned properly.
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Author Comment

by:Afries52
ID: 18868220
so is it possible to realign those? It's old...so it's probably gotten banged around.
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Expert Comment

by:Mark
ID: 18868229
I have been looking for a service manual without luck. Have you tried adjusting the lens shift on the top of the unit?
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Author Comment

by:Afries52
ID: 18868254
yes...it just moves the lense up and down.
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by:Mark
ID: 18868258
Well it looks as if the lcd panels have been knocked about. Without a service manual I have no idea how to adjust them back into alignment. You may attempt to open up the unit and figure out the adjustment procedure,but that may be a delicate job.
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by:Afries52
ID: 18868291
yeah...i will take a look inside of it and let you know.
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Expert Comment

by:Mark
ID: 18868442
All I can find is the user manual http://www.polaroid.com/service/userguides/digital/pv211_ug.pdf
It wouldn't hurt to go over the settings to ensure you have them right. This model is capable of rear projection as well, might want to check if theis setting is correct.
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Author Comment

by:Afries52
ID: 18873762
The rear projection does the same thing...i found the insides...here's a few pictures...maybe you can think of a way to safely get to the colored panels.

here are the links...

http://i25.photobucket.com/albums/c68/afries/DSCN3436.jpg
http://i25.photobucket.com/albums/c68/afries/DSCN3437.jpg
http://i25.photobucket.com/albums/c68/afries/DSCN3438.jpg
http://i25.photobucket.com/albums/c68/afries/DSCN3439.jpg

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Expert Comment

by:Mark
ID: 18873879
Boy that looks complicated, what are those blue components next to each lcd panel. They look like adjustment knobs, but for what is the question. could be electrical.
I am linking a page that has convergence graphs http://www.mediacollege.com/video/test-patterns/convergence/
essentially when the 3 colors from the lcd panels are in correct alignment the lines are white, any color showing will be the lcd panel that needs adjustment. Try it and see if in fact you have a convergence issue.
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Author Comment

by:Afries52
ID: 18873960
well...those little blue things seem to be soddered on there. They don't move. I wondered that myself but after a little force they didnt' move so i didn't go any farther. They are connected to the board by three wires if you will.

 I checked out that website...and here is what it looks like...

http://i25.photobucket.com/albums/c68/afries/DSCN3442.jpg

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Mark earned 250 total points
ID: 18874818
Definately a convergence issue. If all 3 lcd colors lined up it would be just white lines.
The green is of at both vertical and horizontal planes and the red is of at the horizontal plane. The blue seems to line up as white on the horizontal and is lined up with the red vertically and is magenta. Blue is ok
If you are doing adjustments, use this to find the sweet spot of black background and hite lines.

From studying the pics, There seems to be three mains screws on top of the box structure, these may adjust the vertical for each lcd, then on each side of the brown mylex cables, there looks to be screws which would adjust the horizontal for each lcd. But I could be mistaken as they may hust be locking screws to keep things from moving.
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Author Comment

by:Afries52
ID: 18879455
okay...the black screws are for vertical it seems...as there is an area for the screw to move around to a different spot insted of a hole...but are those ones just to make the light a differnt color? moving them did nothing to the lines...it only made that color less/more intense. Could the contents that i need to get to be in that metal box?

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