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nautikal
Joined: 31 Jul 2006
Posts: 116
Location: Rockville, MD
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| Posted: Tue Jan 25, 2011 8:11 am Post subject: Mechanical Setup off after bleeding & remounting |
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I recently bled the R and B tubes on my NEC XG 1100 and had the glass replaced on the green and upon remounting the projector on the ceiling the green tube is no longer is aligned with the center of the screen horizontally (off by ~3"). I have verified that the raster is centered on the green tube so it seems to be a mechanical setup issue of some kind. What could be the reason for this? I am using the factory mount (http://www.curtpalme.com/forum/download.php?id=10970) so there's no way the projector is all of a sudden mounted to the right by 3" or several degrees. The only thing I can think of is that the green tube is now seated a bit differently now. Any other ideas?
So to me it seems like there are two solutions:
1. Move the projector to the left 3" to compensate. (geometry issues may result?)
2. Try to reseat the green tube.
Any other suggestions? Thanks
Last edited by nautikal on Tue Jan 25, 2011 5:35 pm; edited 2 times in total
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Tue Jan 25, 2011 3:08 pm Post subject: |
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Hello
You did not say what model of projector. If you removed or bumped the tube yokes, it may recover by a simple yoke alignment.
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dturco
Joined: 06 Feb 2009
Posts: 3778
Location: Eastern Shore Maryland
TV/Projector: Runco DLP VX-3000i Marquee 9500 parts doner
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| Posted: Tue Jan 25, 2011 3:47 pm Post subject: |
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Yeah, what Tim said. And if it's a Marquee did you have it set to short re-trace before working on it and now it's on long re-trace? That would definitely shift you image about 3 inches.
_________________
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Tue Jan 25, 2011 3:51 pm Post subject: |
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Looking at the link of the mount I think it's a NEC XG
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nautikal
Joined: 31 Jul 2006
Posts: 116
Location: Rockville, MD
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| Posted: Tue Jan 25, 2011 5:34 pm Post subject: |
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Hey, sorry about that. Yes, it's a NEC XG. I did have to adjust the yoke on the green tube after it came back from VDC since it was off a little. The image is square on the tube face now though. How would adjusting the yoke change the image horizontal position? I thought it just rotated it.
Thanks guys.
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gjaky
Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary
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| Posted: Tue Jan 25, 2011 6:22 pm Post subject: |
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How big is your screen? Because that 3" may appear on the tube face around 40 mils discentered which is very hard to notice.
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nautikal
Joined: 31 Jul 2006
Posts: 116
Location: Rockville, MD
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| Posted: Tue Jan 25, 2011 6:24 pm Post subject: |
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Screen is 96x54 (110" diag). I tried adjusting the raster position but it requires far too much adjustment to compensate.
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