Film-Tech Forum ARCHIVE: Red lines on the screen

This is topic Red lines on the screen in forum Digital Cinema Forum at Film-Tech Forum ARCHIVE.

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Posted by Terry Lynn-Stevens (Member # 7349) on 10-10-2014, 02:22 AM:

Can anyone help out on this?

Red lines on the screen when projected. Sometime they will go green. Not all scenes will show it. The lines are vertical.

Posted by Marco Giustini (Member # 4544) on 10-10-2014, 06:40 AM:

a little more details would help. Projector brand/model?

Posted by Monte L Fullmer (Member # 2797) on 10-10-2014, 02:38 PM:

Bet the unit needs a convergence tuneup on the three color panels.

Posted by Marcel Birgelen (Member # 6801) on 10-10-2014, 03:04 PM:

Terry's info is way to vague to draw any conclusions. Convergence issues should not result in vertical lines, but is primarily visible as red/green/blue lines/shadows around sharp edges.

I'm wondering what will cause vertical lines though, since (uncompressed) image data is not "aligned" vertically, but horizontally. This feels more like some kind of scaler issue or maybe a defective media block.

Posted by Terry Lynn-Stevens (Member # 7349) on 10-10-2014, 05:10 PM:

Not sure how to describe it, but it looks like it is sort of like a digital scratch. It looks like pixelated data about a third of the way into the right side of the screen. It always in the same place but is hard to see in the darker images.

Posted by Justin Hamaker (Member # 2165) on 10-10-2014, 07:24 PM:

It kind of sounds like some issues we had with the NEC NC2000C when they were on software version 3.2 (or so). As I remember the problem pretty much went away when we upgraded to 3.3.

Posted by Sam D. Chavez (Member # 1841) on 10-10-2014, 08:38 PM:

This speculation is a complete waste of time unless Terry coughs up some real information.

Posted by Monte L Fullmer (Member # 2797) on 10-10-2014, 11:10 PM:

From what I can gather from Terry's definition, and where we had a NEC1200C do the red line similar thing, is that a chip went bad in the light engine and had to be replaced.

Posted by Marco Giustini (Member # 4544) on 10-11-2014, 12:01 PM:

I quote Sam.
Monte, I can't see why we should try hard, it should be Terry to come up with more details in the first place.

Posted by Monte L Fullmer (Member # 2797) on 10-11-2014, 03:55 PM:

True, the ball is in Terry's court to continue with detailed info, otherwise, we're wasting time throwing darts on the wall and not hitting the target.

Still sounds like a tech needs to be called in though.

thx -Monte

Posted by Mark Gulbrandsen (Member # 72) on 10-11-2014, 05:04 PM:

I had an NC-2000 producing green vertical lines once. It was nothing more than an improperly torqued formatter board which also has integral contacts for the DMD chip. It wasn't quite making contact. projector would warm up about 10 minutes and the vertical lines would appear, then 20 minutes later they would disappear and this was like clockwork. I removed the formatter board from the green DMD and cleaned the gold contacts on the board with pure isopropal to be sure they were spotless and then re-assembled it and torqued properly with the correct tool. It's never had an issue since.... been about 3 years now.

Mark

Posted by Terry Lynn-Stevens (Member # 7349) on 11-24-2014, 03:57 PM:

I just got word about this, so it appears that this is a fan and humidity issues. I don't have all this specific details at this time but it has been corrected.

The projector would be a 2009 Christie 2000 (not sure if there is prefix to the number)

Posted by Sam D. Chavez (Member # 1841) on 11-24-2014, 07:05 PM:

We were all awaiting this news breathlessly. [Confused]

Why post this a month later with no new info? Boring and inane!

Posted by Mark Gulbrandsen (Member # 72) on 11-24-2014, 07:11 PM:

A 2009 Christie 2000? He still hasn't said if its the two door or four door model!

Posted by Jarod Reddig (Member # 6363) on 11-26-2014, 01:26 PM:

Wow this whole thread was a giant waste of time.

Posted by Sam D. Chavez (Member # 1841) on 11-26-2014, 08:44 PM:

Except for Mark's rim shot. Priceless!

Posted by Jarod Reddig (Member # 6363) on 11-27-2014, 11:14 AM:

Indeed Sam indeed! Happy Thanksgiving everyone!

Posted by Terry Lynn-Stevens (Member # 7349) on 11-27-2014, 01:26 PM:

Can anyone help out here?

The problem has resurfaced and it appears that a new light engine will need to be installed. I am assuming a rebuilt can be used? Can anyone give a ballpark figure on cost for the part? And can anyone give an idea of downtime and how long it will take to install? Pros and cons between a rebuilt or new light engine?

The projector is a Christie Digital CP2000.

Posted by Dave Macaulay (Member # 813) on 11-27-2014, 03:27 PM:

Terry:
It won't be cheap. Thousands.
Christie may be able to repair it. Individual parts are generally not available - but if it's a formatter board failure (sounds likely) these can possibly be replaced. Some diagnosis may be possible by swapping cables or parts about in there, but that shouldn't be tried unless you have some experience or training.
There are several CP2000 models - S, SB, ZX, M ... it makes a difference, as I don't believe they all used the same exact light engine.
If it's a CP2000M, I may have a light engine. This is the "small" one, like a home video projector on steroids. The ZX is bigger but still a "table top" unit. The S and SB are rather large, similar to a 35mm console.

Posted by Randy Stankey (Member # 64) on 11-27-2014, 11:17 PM:

Terry, if you could snap a digi-pic of the screen it would go a long way of helping people give you a better diagnosis.

A picture being worth a thousand words and all that...

Posted by Brad Miller (Member # 2) on 11-28-2014, 12:13 PM:

And even with the 4 variations of CP2000 Dave mentioned, he forgot about the XB variation.

As Randy said, take a picture. The serial number plate would be the most useful as it will have all of the pertinent information needed to help diagnose.

Posted by Gordon McLeod (Member # 33) on 11-28-2014, 04:35 PM:

I don't think she works at the theatre in question so I doubt she is party to having steps taken to service it so it is rather pointless speculation
And I suspect there is a service contract in place anyway

Posted by Sam D. Chavez (Member # 1841) on 11-28-2014, 08:13 PM:

Terry is a she troll? Not that it matters though, not enough info to speculate. on the problem.

Posted by Jarod Reddig (Member # 6363) on 11-29-2014, 04:59 AM:

LOL great stuff! Sounds like Gordon got confused.