Question about SharpVision XV-Z9000U Multimedia Projector

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Rolling picture I have projector that picture rolls how do i stop this

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Have you tested the source machine on another TV or projector. The picture might be rolling before it gets to the projector so you need to verify whether it is the source machine or the content then you might be able to determine if it is the actual projector. Sounds like the vertical sync has got lost somewhere.
Hope that helps. Also we can supply lamps for this model if you ever need.
Re your Sharp XV 9000S We are able to supply replacement lamp+housing delivered (excluding local your local taxes) for $US342 as we ship internationally and also the same with our revolutionary ICE Digital Daytime projection screens. Regards Kevin Andreassend ICE AV Technology Ltd +64-9-414 2348

Posted on Sep 09, 2009

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So glad to find a posting regarding this issue. I too have a NEC LT 170 that I <3 and when used the first bulb to the end of what I thought was its life got another. Smiling for months as I watched and enjoyed the big pictures on my Living Room walls. Then it stared, or i should say stopped starting.
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Now My wife is not the fixer in the house though when we were dating we had a beta projector that wasnt working and I was about to take it apart when she said "let me show you what I do" and walked over picked it up and gave it a ittle spank on it's bottom. fliped it back over and pressed plat and all was well. Ever since whenever i am at my technical wits end before i get the hammer I flipp it over and give it a swat. Well it's been a year now and I am embarrassed to say I don't have a better solution though I have refined my understanding.
There is a third contact that is energized by the capacitor to vaporize the condensed mercury in the cold bulb. when I turn it; lense down and give it a slap on the non chord side near the rear (back side by bulb) only while i hear the Capacitor fire (high pitched PEWWW). This shakes the small droplets of condensed cold mercury around the contact that is attempting to arc through them to make the gas that the primary filament fluoresces. Some times I get it on the first try. others on the second or third. Then if I unplug I can try again.
Have you ever noticed on your winshield how the dew covers the whole thing and then as you drive it rolls off in droplets. This projector was designed to be moved alot and the problem only shows up when the cold projector isnt moved and the condensed mercury isn't collected around the firing filament. Rolling and slapping the cool projecter rolls a ball of mercury around collecting all the little balls together to where they can then be vaporised by the capacitor and start the fluorescent reaction.. The permanent fix to this is to redesign the bulb with more mercury.

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2 Answers

Rolling line

If this is seen when you are connecting to a cable box or satellite box like DirecTV through or other such device your issue is most likely a DC ground loop. Here are some suggestions:
Video Projector ground loop
1) If you have horizontal hum bars when your projector is connected to a set-top box or other equipment that are on a different circuit or are grounded causing a ground potential between the source and the projector
2) Hum bars are the result of a ground loop, usually caused by cable television that has not been properly grounded
Try this to verify:
1) Disconnect your cable television coax from the wall by unscrewing it.
2) Run your Projector and verify that you are no longer getting the lines.
If you have verified that the issue was a ground loop by testing the solution requires a DC
Ground Blocker style device similar to the below options:
1) Go to (part number 2118)
2) Purchase a DC GROUD BLOCKER & ISOLATION TRANSFORMER either from the above or similar electronics store location.
3) Other examples and ground loop explanations for both Video & Audio can be found at the following link for information about ground loop; scroll to Why Ground Loop is a Problem:
4) Other commercial antenna signal isolators are available on the web or simply see your local Radio Shack
5) Connect the isolator device chosen to your set-top box and hook it back up.
You will be back-up and running in no time.

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