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Slight yellowing on sides of LC tube caused by fluid?

275 Views 10 Replies 5 Participants Last post by stefuel, Oct 23, 2004

Curt Palme

Discussion Starter · Oct 23, 2004

This is a bit of a new one on me. While I'm watching in awe the image that my Ampro 4300 puts out, I'm noticing a bit of color shift on the right and left 1/4 of the image (approx). I noticed it when the HD channel was showing a B/W photo..

The pix turns a bit yellow on the sides. THe white balance is excellent in the middle.

Before I put the set up, I noticed that the green tube looked as if the coolling fluid was a bit yellow Since the C lens is curved, it would make sense that if the fluid was yellowed, the edges would show some discoloration as the light goes through more fluid.

This is not a screen issue, it's a matte white 1.3 gain screen, and didn't show this on my PG Xtra.

I know Chip changed some fluid in an AmPro LC tube a while back, as have others. Was this due to discoloration? THe R and B tubes are perfectly clear...

Thanks!

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Graham Johnson

· #2 · Oct 23, 2004

That PJ is a bit of a dinosaur Curt, Change out the fluid anyway.

It couldnt hurt and the fluid is cheap.

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Curt Palme

Discussion Starter · #3 · Oct 23, 2004

But that means pulling the beast down off the ceiling and wrecking my 3 hour set up..

Curt

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Graham Johnson

· #4 · Oct 23, 2004

Ummmm $hit happens !!

Cant you swap a tube out when its up there ?? you can on a 1292 takes about 5 mins to pull it. LOL

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Curt Palme

Discussion Starter · #5 · Oct 23, 2004

I probably could, but after today, I don't want to risk it.

got a VDC tube in smashed by UPS, and I bought a set of SD-187 tubes off a guy that left the neck cards on, and used those little inflated plastic baggies to ship them. 2 out of three smashed beyond belief.

And you think I'll risk removing a 9" minty tube on a set 8' up?

Nahhhhhhh!

Curt

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Graham Johnson

· #6 · Oct 23, 2004

I hope the tubes I bought the other week arrive OK.

I have three complete sets of 07MS's coming by surface mail, and some 09MEX's coming by air.

I will be pi$sed off if any get busted.

I have projectors waiting here for them to go into.

You need two people to pull a tube from a roof mounted projector. I wouldnt do it alone.

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techman707

· #7 · Oct 23, 2004

Quote:

Originally posted by Curt Palme
I probably could, but after today, I don't want to risk it.

got a VDC tube in smashed by UPS, and I bought a set of SD-187 tubes off a guy that left the neck cards on, and used those little inflated plastic baggies to ship them. 2 out of three smashed beyond belief.

And you think I'll risk removing a 9" minty tube on a set 8' up?

Nahhhhhhh!

Curt

DO THE RIGHT THING!

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Doug Baisey

· #8 · Oct 23, 2004

Curt,

Put up a all white pattern and turn one tube on at a time looking at the uniformity of each.

I have seen outside focus drift have this affect also if its doing it on one tube esp the blue. Doug

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Curt Palme

Discussion Starter · #9 · Oct 23, 2004

Thanks Doug, I did that, but what seems really apparent is a very slight yellowing of the green cooling fluid. I think I do need to drain it, but I'll save that for an Xmas project.

Curt

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Doug Baisey

· #10 · Oct 23, 2004

Curt,

Yes it sounds logical then. Doug

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stefuel

· #11 · Oct 23, 2004

Curt, the tube slides out the front in about ten minutes. Buy your self a XMAS gift, r and g c-elements. Do all three fluid changes including a thorough tube face cleaning. It takes about four hours to do all three real good. Mine is much newer than yours and the fluid that came out looked like apple juice. Check to see if that PJ has intensity mapping and is activated. (92, 93

Code:

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Chip

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