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ncc1701d
Joined: 08 Aug 2007
Posts: 187
Location: sweden
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| Posted: Mon Feb 04, 2008 11:57 pm Post subject: Strange brighter line on BG1208 |
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I just noticed a brighter line (just barely visible) in the middle of the screen to the right, about 1/5th of the screenwidth. More visible if image is medium bright (not black and not white).
I think it is only one pixel (rasterline) high.
It is not any tube fault because if i move the raster or image the line follows, and is visible on green and red.
Is this the famous barco convergence error? Will it vanish if i redo all settings?
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BG1208 and BG1208/2
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kal
Forum Administrator
Joined: 06 Mar 2006
Posts: 18114
Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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ncc1701d
Joined: 08 Aug 2007
Posts: 187
Location: sweden
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| Posted: Tue Feb 05, 2008 12:05 am Post subject: |
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Yep thats the one i was looking for, but i can't find anything on:
"Barco line of coincidence" or "coincidence" or so..
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Fujifrontier
Joined: 20 Oct 2007
Posts: 354
Location: San Antonio, Texas
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| Posted: Wed Feb 06, 2008 4:05 am Post subject: |
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its here somewhere, ive seen it
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Cinenut
Joined: 06 Feb 2008
Posts: 12
Location: Seattle, WA
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ncc1701d
Joined: 08 Aug 2007
Posts: 187
Location: sweden
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| Posted: Wed Feb 06, 2008 2:23 pm Post subject: |
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Thanks..
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pfloydphanatic
Joined: 26 Jan 2007
Posts: 240
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| Posted: Tue Feb 12, 2008 9:10 pm Post subject: |
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is it something like this?
BEFORE 
AFTER 
after reset everything, did the physical setup a lil better.
now i can't even see any lines anymore.
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ncc1701d
Joined: 08 Aug 2007
Posts: 187
Location: sweden
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| Posted: Mon Feb 18, 2008 12:39 am Post subject: |
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Still have those pesky lines 
I have re-checked my physical setup, done raster centering with pots (all rasters the same size and position), lined up rasterlines with deflection coils, re-done the lens angles, checked pj level again, done all convergence once more, but i STILL have the lines.
One at left side and one at right side.
It does not alter if i twist the image with the convergence adjustments or the N/S or E/W adjustments.
And it still follows if i shift the raster up or down. It IS visible on all tubes (blue very faint).
Never had this problem before i swapped tubes.
One thing i noticed is that i need more convergence adjustments on the right. (up to +75 to +85 in some zones)
From middle to the left all is between -5 to -20
it drives me nuts..
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Ile
Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland
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| Posted: Mon Feb 18, 2008 8:09 am Post subject: |
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Sometimes chancing bow settings (few steps) makes problem go away.
Have you tilted projector down?
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ncc1701d
Joined: 08 Aug 2007
Posts: 187
Location: sweden
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| Posted: Mon Feb 18, 2008 12:28 pm Post subject: |
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Actually i have it tilted as calculated in the lens program. 4cm lower at the back compared to front.
I will try it levelled also, but i am afraid i can't shift raster enough then. I have very low ceilingheight.
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ncc1701d
Joined: 08 Aug 2007
Posts: 187
Location: sweden
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| Posted: Tue Feb 19, 2008 9:25 pm Post subject: |
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Thought of one more thing.. i have to adjust convergence horizontallt more on the right side, so should i adjust the horizontally linjearity (on blue/red) also to get it more even on both sides or will it affect the image as it does with vertical linjearity?
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