Panasonic PT-AE4000U Color Uniformity Issue - Home Theater Forum and Systems - HomeTheaterShack.com

 
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post #1 of 4 Old 10-08-14, 03:29 AM Thread Starter
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Panasonic PT-AE4000U Color Uniformity Issue

My projector (purchased new) is 4 years old and has 1450 hrs on the original lamp, all in eco mode. Non-smoking house. About 300 or so hours ago, I noticed some color uniformity issues. The lower left of the screen pushes toward red and the upper middle pushes blue/green. The effect is most noticeable when the image is grey to white (think Hoth scenes, B&W movies, grey screen test patterns).

Any ideas on cause/solution?
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post #2 of 4 Old 10-09-14, 05:44 AM
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Re: Panasonic PT-AE4000U Color Uniformity Issue

Unfortunately there's nothing to be done about it. As Mech said, it's a panel thing (i believe in all LCDs after many hours the dicroic filters lose their structural integrity due to temperature and cause this effect).

A simple workaround is to make the picture a bit colder by raising blue gain. It's not a full proof solution, but works well in most cases.
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post #3 of 4 Old 10-09-14, 07:12 AM Thread Starter
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Quote:
Yiannis1970 wrote: View Post
Unfortunately there's nothing to be done about it. As Mech said, it's a panel thing (i believe in all LCDs after many hours the dicroic filters lose their structural integrity due to temperature and cause this effect).

A simple workaround is to make the picture a bit colder by raising blue gain. It's not a full proof solution, but works well in most cases.
Thanks. Can the lcd panels be replaced by a repair shop?
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post #4 of 4 Old 10-09-14, 02:21 PM
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Re: Panasonic PT-AE4000U Color Uniformity Issue

No, that i am aware of..
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