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waterlily
Joined: 29 Aug 2008
Posts: 44
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| Posted: Wed Dec 17, 2008 2:34 am Post subject: HELP! removing Bubbles on c-element in LC chamber |
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Hi 
I just finished replacing the glycol for the blue 9" LC p19LCP on a marquee 9500LC
(There was fungus in the old fluid)
All went well except that I am having some trouble getting rid of small bubbles stuck on the inner c-element surface.
I have tried shaking the tube and turning it upside down, etc
This has helped a bit, but after a couple hours of this, there are still many bubbles left and my arm is getting tired 
Any ideas or suggestions on how to get rid of these?
I have attached pictures of what they look like.
Thanks!!
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Wed Dec 17, 2008 2:55 am Post subject: |
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Look again in the morining and some of them will be gone. Run it for a week and most of them, if not all will be gone.
_________________
Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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Gary M.
Guest
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| Posted: Wed Dec 17, 2008 3:27 am Post subject: |
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they will be gone after a few days or so, just wait it out, no worries 
-Gary
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waterlily
Joined: 29 Aug 2008
Posts: 44
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| Posted: Wed Dec 17, 2008 4:00 am Post subject: |
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Cool!! 
This is my first LC projector and glycol change experience so I didn't know if I should be worried.
Thanks for the replies! 
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Dave Lister
Joined: 16 Jan 2007
Posts: 436
Location: Adelaide, South Australia
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waterlily
Joined: 29 Aug 2008
Posts: 44
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| Posted: Thu Dec 18, 2008 4:12 am Post subject: |
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| Dave Lister wrote: | | When you are about to put the C element back on would it be of any benefit in reducing the chance or amount of bubbles that get caught on it by smearing some glycol onto it to 'wet' the C element with glycol as I am guessing that the C element being 'dry' of glycol is what is causing the air bubbles to stick to it? |
Hi Dave,
I flushed/cleaned the fungus and replaced the glycol without removing the bellows or the c-element.
When I refilled the glycol through the vent hole, I filled partway, then swished around the glycol to get all the LC cavity wet before continuing.
I had to use quite a bit of pressure to get the glycol through the vent hole, and made the mistake to let the squeeze bottle I was using go dry so it spat a bunch of aerated glycol into the chamber.
Lesson learned ...
I took pictures of the whole process and parts I used in case it helps anyone, and will post it soon.
It did not take long at all, under and hour in all from beginning to end.
Since I posted the earlier pictures, I see a bit less bubbles, not much.
Looks like it is going to take a while. 
Anyway, plenty to do still before I get to mounting the projector, so I hope they just go away.
I had read somewhere a reference to a surfactant being present in projection coolant but I don't think the one I used (Ashland projection coolant) had any kind of additive like that in it.
Thanks for your reply, it's good advice for anyone installing a c-element
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zGman
Joined: 22 May 2006
Posts: 599
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| Posted: Thu Dec 18, 2008 5:22 am Post subject: |
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Yes you have it, once you pressurize the glycol and induce the bubbles, they are happy
to play and hang out. But probably most of us have been there also, and they will slowly
go away - please avoid shaking the tube though, great way to get some contamination
stirred up and into your electron gun, for a nicely lit raster and light show on turn-off.
G
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waterlily
Joined: 29 Aug 2008
Posts: 44
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| Posted: Thu Dec 18, 2008 11:21 pm Post subject: |
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| zGman wrote: | Yes you have it, once you pressurize the glycol and induce the bubbles, they are happy
to play and hang out. But probably most of us have been there also, and they will slowly
go away - please avoid shaking the tube though, great way to get some contamination
stirred up and into your electron gun, for a nicely lit raster and light show on turn-off.
G |
Thanks zGman, I didn't think about that while I was tilting the tube back and forth. Great advice, I will definitely keep it in mind.
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