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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Mon Apr 20, 2009 4:34 pm Post subject: Strange Barco problem |
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I've been going back and forth on this BG808 that's located overseas, as I can't think of a solid cause for this problem. Cutting and pasting some dialogue that we've had. Pix attached.
The test of the test pattern also bends. Situation changes. When the power is on, no picture appears for about 2-3 mintues, and then bending picture appears for a few seconds not 2 minutes and resume normal.Thanks.
I'm guessing power supply, RGB board, H output board or focus/H shift board (not likely).
For this to act up like this for a couple of minutes, then curing itself makes me think power supply or H output board most likely?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Mon Apr 20, 2009 6:06 pm Post subject: |
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I'm curious why you would think Horz or focus shift since the menu seems mostly fine other then some after affect.
Did you have him try reseating any boards, for example vert/sync, RGB input or RGB analog?
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WTS
Joined: 08 Mar 2006
Posts: 1276
Location: Calgary
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| Posted: Mon Apr 20, 2009 6:09 pm Post subject: |
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Correct me if I'm wrong here, the picture in the background is tearing but the menu is fine? I'm not sure about the video board on the 808 but on the 808s the menu data is inserted on the rgb switcher board, so if the menu appears fine then I would say it's on the RGB board butI'd have to look at the schematics to know for sure.
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Walter
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Mon Apr 20, 2009 6:22 pm Post subject: |
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THere is some tearing of the menu, but not nearly as bad as the picture. I agree, it's most likely not the H shift board, but since the customer is overseas, if he is going to send me boards to repair, I wanted to cover every base.
I don't think he's reseated any board yet.
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Mon Apr 20, 2009 6:27 pm Post subject: |
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Source 95 ? 
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Domenico (Barco fan!)
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Mon Apr 20, 2009 6:29 pm Post subject: |
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BTW, it's a BG808s. I've NEVER had an RGB switcher card go intermittent.
I've emailed him back to see if he can try a video or Svideo source and/or a different RGB source just to make sure it's not source related. I've also told him to monitor the +17 volt supply to see if the SMPS drifts over time.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Mon Apr 20, 2009 6:44 pm Post subject: |
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| Curt Palme wrote: | | BTW, it's a BG808s. I've NEVER had an RGB switcher card go intermittent. |
This is why I suggested reseating. That could cause intermittent. If you have him send you boards, make sure you get the controller board also since you indicated the problem is also there with the test patterns.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Mon Apr 20, 2009 6:45 pm Post subject: |
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Curt what is the video source and is the projector set for high or low speed sync ?
Just wondering...
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secstate
Joined: 20 Mar 2006
Posts: 720
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| Posted: Mon Apr 20, 2009 6:47 pm Post subject: |
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| Decibel wrote: | | Source 95 ? |
Source 95 is just port 5 but with a different memory block. Pressing 9 before any of the standard inputs on a Barco allows you to create a separate memory block with different settings. Very handy, gor say do different 1080p configurations on the same input.
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perisoft
Joined: 29 Aug 2007
Posts: 2920
Location: Ithaca, NY
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| Posted: Tue Apr 21, 2009 1:59 pm Post subject: |
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| secstate wrote: | | Decibel wrote: | | Source 95 ? |
Source 95 is just port 5 but with a different memory block. Pressing 9 before any of the standard inputs on a Barco allows you to create a separate memory block with different settings. Very handy, gor say do different 1080p configurations on the same input. |
Whoah, that's awesome... I've gotta give that a try!
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Wed Apr 22, 2009 2:52 am Post subject: |
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Shearing is likely to be a sync issue.
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