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Who knows something about lcd projectors? (see pic)
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macgyver655



Joined: 22 Aug 2007
Posts: 6953



PostLink    Posted: Thu May 27, 2010 4:13 pm    Post subject: Reply with quote


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drice1234 wrote:
To the same address as the receiver? I would have thought the filter would have to be after the LCD panel which I assume is part of the assembly with the 3 ribbon cables coming out of it.



Yeah, same address. The reason I'm not giving more info on finding and removing the possible bad parts is because if the wrong screw or bracket is loosened or removed then the entire alignment may be thrown off and may not be realignable without special equipment. Plus if the exact part is not available then one from something else may be able to be used but may have to be retrofitted and may require special attention to function properly.

Its not always about just finding the bad part. Very Happy

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drice1234



Joined: 07 Oct 2006
Posts: 1310
Location: Allen, Texas


PostLink    Posted: Thu May 27, 2010 4:25 pm    Post subject: Reply with quote

OK, I'll send the one I did not take apart Laughing
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cmjohnson



Joined: 03 Apr 2006
Posts: 1677



PostLink    Posted: Fri May 28, 2010 6:56 pm    Post subject: Reply with quote

Green dichroics usually don't fade. I've never yet seen either a red or green dichroic element that had faded much if at all.


CJ
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ecrabb



Joined: 13 Mar 2006
Posts: 12473
Location: Iowa

TV/Projector: JVC RS45


PostLink    Posted: Fri May 28, 2010 10:06 pm    Post subject: Reply with quote

Interesting, CJ.... So, what would be responsible for the green predominance? Seems like green predominance would have to come from either too much green, or not enough red and blue, neither of which seem like a likely scenario given your experience.

Green LCD stuck wide open AND blue filter fade?

SC
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cmjohnson



Joined: 03 Apr 2006
Posts: 1677



PostLink    Posted: Sat May 29, 2010 9:44 pm    Post subject: Reply with quote

Well, if there's no blue content then green will predominate. Red is usually a minor component in a typical picture.


It's kind of hard to diagnose this one without some good photos of various optical components in operation when I know exactly
what the input image is supposed to look like.


CJ
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ecrabb



Joined: 13 Mar 2006
Posts: 12473
Location: Iowa

TV/Projector: JVC RS45


PostLink    Posted: Thu Aug 26, 2010 5:16 pm    Post subject: Reply with quote

Hey, Dan - Did you ever fix one or both of these machines? I'm just curious where the problem ended up being.

SC
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projtech



Joined: 26 May 2011
Posts: 6
Location: United States


PostLink    Posted: Thu May 26, 2011 2:39 pm    Post subject: Reply with quote

I doubt he fixed them.
His blue panel is shot and his green optics, in and out polarizers, are shot.
Wish I would have found this forum sooner. I could save you guys some disassembly! :p
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