Panasonic picture has spots! - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 4 Old 10-04-2017, 03:25 PM - Thread Starter
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Panasonic picture has spots!

Hey guys, my Panasonic PT-AE4000U has some blotchy spots and fuzziness. Mainly in the lower-right of the image.

Any idea why?

Are you able to tell anything from these pictures?

https://photos.app.*******/h7L8UpH2dzweAle52

Thanks!
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post #2 of 4 Old 10-04-2017, 07:28 PM
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Looks like dust blobs, adjust the focus and see if they come into focus. Burnt polerizers are also a possibility and they can't be focused. Dust blobs can be cleaned out if you know what you are doing, burnt polerizers are not worth fixing..

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post #3 of 4 Old 10-04-2017, 09:16 PM
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Quote:
Originally Posted by mcaskey View Post
Hey guys, my Panasonic PT-AE4000U has some blotchy spots and fuzziness. Mainly in the lower-right of the image.

Any idea why?

Are you able to tell anything from these pictures?

https://photos.app.*******/h7L8UpH2dzweAle52

Thanks!
Burnt polarizers are generally more rounded, while your issues on the separate colors are blocky and in different areas. That rules out lens and dichroic mirror as well. That make me think the lcd panels for green and blue are failing. Time to replace that pj. One of the many reasons I stay away from lcd projectors.

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post #4 of 4 Old 10-05-2017, 08:16 AM
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Quote:
Originally Posted by mcaskey View Post
Hey guys, my Panasonic PT-AE4000U has some blotchy spots and fuzziness. Mainly in the lower-right of the image.

Any idea why?

Are you able to tell anything from these pictures?

https://photos.app.*******/h7L8UpH2dzweAle52

Thanks!
I'm not sure, but I suspect that the red polarizer in your projector has heat damage. Your red screen shot looks like the green image on my Panasonic PT-AE4000U. I was not able to focus on the spots. I opened the projector anyway and tried blowing out the polarizers and LCD panels, but to no effect.

In August I replaced my Panasonic with a BenQ HT2050 DLP projector. Overall, I'm much happier with the BenQ at about 1/3 the price of the Panasonic. The BenQ's picture is much sharper than the Panasonic's. With lens shift, my Panasonic had what has been variously described as ghosting, bleeding, smearing or blurring:
Panasonic PT-AE4000 MSRP $1999
Panasonic PT-AE4000 MSRP $1999

Subjectively, after about 200 hours on the lamp, I find the black level at Economy or Smart Eco setting no better than the Panasonic, but little if any worse. The BenQ is significantly brighter, even at the Economy and Smart Eco lamp setting. The Smart Eco setting is like an electronic version of a dynamic iris. It lowers lamp power in dark scenes and increases power in bright scenes. The Panasonic has better screen uniformity. The BenQ is brighter at the center of the screen than the corners, but this is rarely noticeable in normal content.

It's most disappointing. I shall have to go all-out on some modifications.
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