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need Help, black strip problem BenQ W1000

1841 Views 4 Replies 3 Participants Last post by AV_Integrated, Jan 21, 2021

slimmy182

Discussion Starter · Oct 20, 2019

Good morning guys! I ask venia if I do not use technical terms as a noob, but I would like to ask for help: for a few months on the right side of the projection screen came out a "shadow zone", a vertical strip where the projection brightness seems waned, that is the edge there of the image, but it's like there's a lack of brightness. I attach the photos!
I have noticed that this "shadow zone" has, slowly, increased over the months. I'd like to sort it out before it gets viewing impossible, do you have any advice? Thank you!!

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descalabro

· #2 · Oct 20, 2019

Hi,

I would say there's either a cracked glass or some kind of particle (textile, paper, plastic, etc.) anywhere between the lamp and the lens; I guess it's probably closer to the DMD chip, where the image is formed. You can always try to open the projector and look for what I have suggested to be the cause of the issue.

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AV_Integrated

· #3 · Oct 21, 2019

Looks like the light tunnel may be collapsing in the projector. This is a fairly common issue with DLP projectors that doesn't happen a ton, but does happen enough to be identifiable.

The light tunnel sits before the DMD and helps direct light accurately. It's several mirrors which are glued together, and sometimes they come apart a bit, which causes shadowing on the image.

You can attempt a repair yourself, but it's apparently not very easy to do. Look online for videos of a light tunnel repair.

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slimmy182

Discussion Starter · #4 · Jan 17, 2021

AV_Integrated said:
Looks like the light tunnel may be collapsing in the projector. This is a fairly common issue with DLP projectors that doesn't happen a ton, but does happen enough to be identifiable.

The light tunnel sits before the DMD and helps direct light accurately. It's several mirrors which are glued together, and sometimes they come apart a bit, which causes shadowing on the image.

You can attempt a repair yourself, but it's apparently not very easy to do. Look online for videos of a light tunnel repair.

That's really helpfull! Do you think is possibile to replace only the Light tube?

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AV_Integrated

· #5 · Jan 21, 2021

slimmy182 said:
That's really helpfull! Do you think is possibile to replace only the Light tube?

Check out FixItFrank on YouTube. He has videos that show you how to tear down your projector and to fix just the light tunnel. It doesn't necessarily need to be replaced. It is fragile, and it takes a fair bit of work to do it yourself, but it can be done. You could also destroy your projector along the way, so be careful if you try to do this.

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