CurtPalme.com Home Theater Forum

moby · Joined: 18 Nov 2008 Posts: 64

Hey guys.

I have a problem that I havent dealt with since I got my projector fixed. its a marquee 9500 lc ultra
What is up with the green aura ocurring during convergence?
Whenever I watch a movie During light scenes or scenes where theres a lot of white a green aura occurs aound the area.

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Green on focus board might be out, swap it with the red and see what happens.

Athanasios

mp20748 · Posted: Sun Jan 31, 2010 9:17 pm Post subject:

Glycol contamination..

The actual grid is well focused and defined. The glow is either a tube or glycol - what does the Glycol look like?

cmjohnson · Joined: 03 Apr 2006 Posts: 5180 Location: Buried under G90s

I think the focus looks OK but the halo looks just like what happens when the coolant gets yellowed and cloudy. Since it's behind a green tinted C element, you won't be able to see the color change but the murkiness should be evident by lowering the contrast and looking into the lens at close range.

This same thing is slowly happening to my own machine. But I've got upgrades to do in a couple of weeks so I'll deal with it all at once.

CJ

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Yepp you guys are right, i didn't look to close .

Athanasios

draganm · Joined: 08 Mar 2006 Posts: 8990 Location: Colorado

yes the Focus board is fine, I had it here and tested/worked on it. It is possible to replace the Glycol with the machine on the ceiling isn't it?
You can see how yellow it is even in the picture.

bbfarmht · Posted: Sun Jan 31, 2010 9:39 pm Post subject:

I think it adds ambiance!!!

moby · Joined: 18 Nov 2008 Posts: 64

I just had my glycol changed on all three tubes when it was set up. Has it been done wrong somehow?

dturco · Posted: Sun Jan 31, 2010 10:41 pm Post subject:

moby · Joined: 18 Nov 2008 Posts: 64

Nashou66 · Joined: 12 Jan 2007 Posts: 16171 Location: West Seneca NY

Well if its not the glycol then check the focus board or VNB by swapping cables from one color to the other on the focus board and swap the vnb's from the red to green tube. This could be a bad tube as well now.

Also what is your contrast level set to? and recheck your G2 levels for green again.

Athansios

CIR Engineering · Posted: Mon Feb 01, 2010 2:54 pm Post subject:

It is hard to tell from a photo because it could be over exposed, but in the photo it looks like the green is being driven too hard. Are the magnetics well setup and is the contrast below 60?

craigr

Andreas33 · Joined: 18 Sep 2006 Posts: 17 Location: Germany

Maybe G2 settings too high ?

cmjohnson · Joined: 03 Apr 2006 Posts: 5180 Location: Buried under G90s

The grid lines are clean and sharp. Focus isn't the problem here. There's contamination in the optical path. It's most likely to be murky glycol but it could be a dirty lens element, too.

CJ