D-ILA Stuck Pixel Question - AVS Forum
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post #1 of 15 Old 05-02-2001, 10:58 AM - Thread Starter
 
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For those who know, if the machine has stuck pixels, are they noticeable while watching a movie or HD. There is someone selling a G15 with 3-4 stuck pixels for a great price. There are 2 blue stuck off pixels, one in the mid-upper left portion of the
screen and another in the upper right portion of the screen. He found them by doing a surface scan of a solid blue pattern from a couple of feet away. There is also one stuck off red pixel in the mid lower mid right portion of the screen. He believe that these are actually 2 pixels that are adjacent to one another.

So the question is, will this distract from viewing, or is the pixel issue overblown?

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post #2 of 15 Old 05-02-2001, 12:25 PM
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Humey,

I don't have any pixel issues myself, but would think that stuck "off" would be a very minor deal. Remember that there are over 4 million individual pixel elements (counting R, G, B separately).

Stuck "on" is a different story, and although small, I would still find it distracting.

However, if you don't bite yourself, let me know through private e-mail where to find out more about it....I'm interested. I am looking for an economical second D-ILA.

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post #3 of 15 Old 05-02-2001, 01:29 PM
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Hi Humey,

I have recently discovered a stuck-on red-magenta pixel to the left of center screen. It appeared without prior warning :-) at around 150hrs of lamp use. Like Mark says, there are so many pixels in the Dila grid, and the picture is so dense, that once you watch a movie, you'll have to look for it to notice it. Especially during a movie that has no outside bright shots. On the other hand, I do notice it right away, and it becomes quite distracting, when I watch something like a Disney cartoon animation, like during the Pixar intro. It is very noticeable when the blue Pixar screen is up.

Luca
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post #4 of 15 Old 05-03-2001, 06:30 AM
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Humey,
There is a great difference between stuck on vs. stuck off pixels.

I've got two stuck off blue pixels right together on my G10 clone. The only way I can see them is if I put up a blue screen and walk up to it. When an all white screen is projected, the area is slightly yellow, again at close range.

Stuck off pixels are a non-issue, imho. (Lcds & d-ilas, not dlps)

I've seen many stuck on pixels when I went through a bunch of Epson 710c 's. Even one is easily seen and very distracting. The best 710c I finally decided to keep for work had one stuck on blue pixel. Green and red pixels on the 710c appeared much brighter and disturbing.

Stuck on pixels are a deal killer, imho.
Jeff

[This message has been edited by JSC (edited 05-03-2001).]
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post #5 of 15 Old 05-03-2001, 10:17 AM
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Perhaps more than a bit http://www.avsforum.com/ubb/smile.gif My worry is that someday a pixel may defect to the light side, like one of Luca's apparently did.
Jeff
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post #6 of 15 Old 05-03-2001, 09:29 PM
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Quote:
<font face="Verdana, Arial" size="2">Jeff wrote:
Stuck off pixels are non-issue...
Stuck on pixels are a deal killer
</font>
Are you saying that there is a bit of a difference between stuck ON and stuck OFF ? &lt;big grin&gt;

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post #7 of 15 Old 05-04-2001, 05:47 AM
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Well I have a stuck on red pixel. Just one on my DILA but it is very close to the center. It does distract me. I may just get it serviced under warranty, but it is a pain to deal with due to shipping and such. When my Panamorph arrives it might help a lot because the Pixel will then be about 30% smaller than it already is. Clusters of bad pixels are even worse. But this is my opinion only.

Cameron

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post #8 of 15 Old 05-04-2001, 07:02 PM
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Cameron,

You may already know this, but the SE JVC Service Center is about
an hour or so away from you (non-rush hour) up in Duluth. My G11 is
currently there getting serviced - I much preferred to drop it
off rather than risk shipping it. And I assume they service it
on-site since they told me they didn't need the box.

They say it's about a 2-3 week turnaround for professional products
like the D-ILAs. We'll see - mine's been in for about 2.5 weeks now.

Take care,
Robin
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post #9 of 15 Old 05-04-2001, 07:07 PM
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So if you have pixels stuck on or off, you can take it to a JVC service Center to fix it/them??

Does this cost anything?? What is their spec for bad pixels where they decide it is a problem that may be handled under warranty, and when do they say 'tough luck'..??

-- Cain

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post #10 of 15 Old 05-05-2001, 07:42 AM
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Robin,

I didn't know that. Well that will make my servicing much easier.

Thx,

Cameron

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post #11 of 15 Old 05-05-2001, 11:53 AM
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Cain,

The thread at http://www.avsforum.com/ubb/Forum10/HTML/003379.html discusses the acceptable versus non-acceptable criteria for the Dukane
projectors and surmises that JVC's policy might be similiar. But,
as far as I know this is just speculation.

I'd call JVC to see what their policy is on this before committing
to a purchase. Ironically, it might be better deal to purchase a unit with
more dead pixels (esp all of the same color) and getting it fixed as
opposed to living with a unit with only one or two dead pixels, depending
on JVC's policy.

JVC's service website is at http://www.jvcservice.com and lists contact
information, etc. The e-mail portion of the site appears to be broken
however (at least it was 3 weeks ago).

My unit was an MVS showroom unit that shaded everything red along the
right edge, basically blending the image more red as it approached
within 1-2% of the edge. But no stuck pixels. If JVC fixes it properly,
I'll have gotten a fairly good deal.

Take care,
Robin
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post #12 of 15 Old 05-05-2001, 05:52 PM
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Hi Robin, thanks for the info..

Please let us know how the service trip works out for you. Best wishes!

-- Cain
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post #13 of 15 Old 05-06-2001, 12:37 PM
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One important thing to realize is that 'getting dead pixels fixed' by JVC does not imply you are guaranteed to get a dead-pixel-free projector back. All they will do is swap out the 3 imaging chips for another set of 3 that are within spec. These new ones could very well have dead pixels as well, and the overall result may be worse, not better.

For this reason, I wouldn't take my chances trying to get a DILA fixed unless it has stuck-on red or green pixels. Stuck-off or Stuck-on blue (which is pretty unnoticable as well) are probably not worth fixing, because you could end up with something worse!

Andy K.
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post #14 of 15 Old 05-06-2001, 02:29 PM
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I had 2 stuck on Pixels one red and one Blue near the center, I drove my G11 projector to JVC service only live 1.5 hours away. They are replacing the optical unit. Its been at JVC for 3 weeks now as they are waiting on the part, Im still waiting for them to call me and I will let u guys know how it turns out soon I hope....
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post #15 of 15 Old 05-06-2001, 03:57 PM
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Cardguy,

I hope it works out well for you. Please keep us posted.

thanks,

Cameron

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