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Gino
Joined: 22 Apr 2006
Posts: 1363
Location: Trinity Beach, AUSTRALIA
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| Posted: Sun Mar 30, 2008 3:06 am Post subject: strange lines on rasters |
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Anyone ever seen this before? There's one bright line at top of the raster which is acutally wider than the internal test patterns (raster) along the tube face. Then there is a second line below it which kinda bows in the middle.
I have just installed new LUGs on the 9500 Ultra's. It happens randomly for random periods of times and then disappears again. It happens with external sources and with internal test patterns. It happens on all 3 of my tubes at the same time
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Nashou66
Joined: 12 Jan 2007
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Location: West Seneca NY
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sun Mar 30, 2008 2:21 pm Post subject: |
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Have you tried changeing the sync mode? Maybe the lugs dont like the setting your at now.
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Gino
Joined: 22 Apr 2006
Posts: 1363
Location: Trinity Beach, AUSTRALIA
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| Posted: Sun Mar 30, 2008 3:37 pm Post subject: |
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Yes, I have tried changing almost every option in the menu, no change
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Gino
Joined: 22 Apr 2006
Posts: 1363
Location: Trinity Beach, AUSTRALIA
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| Posted: Sun Mar 30, 2008 3:40 pm Post subject: |
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Today I tried changing over the CLM and VIM and lines still there.
I also played around with the raster, changing size and geometry and convergence makes the lines follow. Blanking makes the lines slightly dimmer but doesn't blank them out.
Now a flickering raster and noisy raster is occuring randomly. I'll try swapping the HVPS and LVPS tomorrow.
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macgyver655
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Gino
Joined: 22 Apr 2006
Posts: 1363
Location: Trinity Beach, AUSTRALIA
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| Posted: Sun Mar 30, 2008 11:42 pm Post subject: |
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Does sound similar to some of the symptoms I'm experiencing, but it appears those are for projectors made in 1995. One would assume with my projectors being made in 2002, that these fixes would have already been applied?
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macgyver655
Joined: 22 Aug 2007
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| Posted: Mon Mar 31, 2008 12:15 am Post subject: |
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| Gino wrote: | | Does sound similar to some of the symptoms I'm experiencing, but it appears those are for projectors made in 1995. One would assume with my projectors being made in 2002, that these fixes would have already been applied? |
You would think so. Could however indicate the problem is in the vertical deflection module. Have you tried swapping that yet?
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Gino
Joined: 22 Apr 2006
Posts: 1363
Location: Trinity Beach, AUSTRALIA
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| Posted: Mon Mar 31, 2008 1:31 am Post subject: |
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That will be tonight, I plan on swapping every part I can over.
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Gino
Joined: 22 Apr 2006
Posts: 1363
Location: Trinity Beach, AUSTRALIA
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| Posted: Mon Mar 31, 2008 11:45 am Post subject: |
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Aurrrggghhhhhh... now I'm getting frustrated. After spending many hours I've swapped over the:
VIM, CLM, HDM, FCM, Astig Board, Convergence Board, CCM, VDM, LVPS, HVPS and still have the same problem on all 3 rasters. Have tried running each tube connected one at a time and still get the same problem.
I've noticed that if the projectors have had time to cool, it takes longer for the problem to present itself. But now, when it has, it rarely goes away.
I've also reinstalled the stock fans to check if its a cooling issue.
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1031
Joined: 22 Mar 2006
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Location: Finland
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nuttall_chris
Joined: 08 Mar 2006
Posts: 832
Location: Ottawa, Ontario, Canada
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| Posted: Mon Mar 31, 2008 11:57 am Post subject: |
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It sounds like the only think left would be the neck boards. Try disconnecting the cables from the VIM to the neck boards to try to isolate where the problem is. If the problem persists with the VIM cables disconnected most of the video chain is likly ok. As it's happening on all three tubes it's not likely a neck board problem unless something was damaged on all three when you modded them for use with the LUGS.
Chris.
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Nashou66
Joined: 12 Jan 2007
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Gino
Joined: 22 Apr 2006
Posts: 1363
Location: Trinity Beach, AUSTRALIA
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| Posted: Mon Mar 31, 2008 11:04 pm Post subject: |
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| 1031 wrote: | Have you tested lower g-2 levels (and use higher brightness setting).
Check also solderpoints at vnbīs multipinconnectors. |
Lowering G2 levels doesn't get rid of the line.
Solderpoints? You are referring to the white connector at the bottom of the neck board?
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Gino
Joined: 22 Apr 2006
Posts: 1363
Location: Trinity Beach, AUSTRALIA
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| Posted: Mon Mar 31, 2008 11:08 pm Post subject: |
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| nuttall_chris wrote: | | It sounds like the only think left would be the neck boards. Try disconnecting the cables from the VIM to the neck boards to try to isolate where the problem is. If the problem persists with the VIM cables disconnected most of the video chain is likly ok. As it's happening on all three tubes it's not likely a neck board problem unless something was damaged on all three when you modded them for use with the LUGS. |
I'll try tonight. I had Mike Parker do the LUG mods for me. The other projector works without these problems.
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macgyver655
Joined: 22 Aug 2007
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| Posted: Tue Apr 01, 2008 1:15 am Post subject: |
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Possibly a poor ground somewhere if not from the leak.
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1031
Joined: 22 Mar 2006
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mp20748
Joined: 12 Sep 2006
Posts: 5689
Location: Maryland
TV/Projector: 9500LC Ultra / Super 02 and 03 VIM
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| Posted: Tue Apr 01, 2008 10:49 am Post subject: |
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This problem is weird. It seems to not be related to any of the boards, nor an external source.
I've had similar noise problems that were hard to figure out, but in the end it was a defective yoke in one case. And a defective HVPS in the other. If they too have been swapped around, I'd suspect the HV splitter.
Not sure what else could be causing this but a good new should include the yokes, splitter and I would also try removing the focus and stig modules from connection and seeing what happens.
I'll be out for most of the day, but will be available later tonight. And from there I'll run the test unit and we'll see what we can do to make this problem go away from this end.
mike
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NewbieDAN
Joined: 09 Mar 2006
Posts: 319
Location: Bunbury Western Australia
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| Posted: Wed Apr 02, 2008 1:04 am Post subject: |
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It seems the glycol is the culprit, the 'A site' lists the glycol inside one of the connectors on the backplane, it appears that this, once cleaned will solve the quirkiness of the LUG trying to display Sony AKB lines 
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Gino
Joined: 22 Apr 2006
Posts: 1363
Location: Trinity Beach, AUSTRALIA
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| Posted: Wed Apr 02, 2008 11:56 am Post subject: |
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Just keeping this site up to date:
| Quote: | Yep, after swapping just about every board in there, I told Cliff that the only thing left was the back plane and the top motherboard and I was hoping it wasn't that because It's going to be a 3 hour job to get beneath them.
Then I recalled this morning that when we removed the old tubes that the green tube had a slight leak. Now that that projector had been sitting that way for over 4 months unused, there's a good chance that glycol had slowly made its way to these boards. I can confirm that there was some glycol found sitting on the table beneath the projector.
So hopefully this is the problem and things are back up and running tonight. |
| Quote: | After spending a couple of hours removing everything out of the projector to get to the backplane board, it is obvious that there is glycol in the sockets which connect to the upper motherboard. (Why did they design it like this?! Those of you who have had to remove this backplane board know what a major PITA it is to completely remove it)
Will clean and let dry over night, I'm 99% sure that this explains the strange things I've been seeing. |
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