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A Rogers
Joined: 14 Feb 2011
Posts: 133
Location: Toronto On
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| Posted: Sun Apr 17, 2011 2:58 pm Post subject: XG width issue |
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Anyone know what would cause the width to shrink by aprox .5" on both sides towards center for a split second every 2-3 seconds? While not really perceivable while watching film, it drives me nuts when I notice it.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sun Apr 17, 2011 4:03 pm Post subject: |
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Horz deflection or geometry first come to mind.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sun Apr 17, 2011 4:05 pm Post subject: |
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Put up a full grid pattern and see if it does it there and if so does the convergence change at all?
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A Rogers
Joined: 14 Feb 2011
Posts: 133
Location: Toronto On
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| Posted: Sun Apr 17, 2011 5:18 pm Post subject: |
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| macgyver655 wrote: | | Put up a full grid pattern and see if it does it there and if so does the convergence change at all? |
It does it on the grid pattern, convergence doesn't change. I've already swapped pretty much every card in the cage with the exception of the system board (no working spare). I think it started doing it after I had maxed the contrast while doing the electronic focus.( I run b65/c75 under normal operation)
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sun Apr 17, 2011 5:22 pm Post subject: |
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Have you tried the deflection board or dont you have a spare?
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A Rogers
Joined: 14 Feb 2011
Posts: 133
Location: Toronto On
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| Posted: Sun Apr 17, 2011 5:30 pm Post subject: |
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| macgyver655 wrote: | | Have you tried the deflection board or dont you have a spare? |
not yet, but it would seem to be the next logical thing to try.( I have a spare set)
Thanks for the help.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sun Apr 17, 2011 7:19 pm Post subject: |
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Did you also try the OSC board?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sun Apr 17, 2011 7:21 pm Post subject: |
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Never mind, that would probably cause the whole image to move.
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A Rogers
Joined: 14 Feb 2011
Posts: 133
Location: Toronto On
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| Posted: Sun Apr 17, 2011 8:33 pm Post subject: |
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hmm, replaced the deflection board and tried the OSC, no dice.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sun Apr 17, 2011 8:42 pm Post subject: |
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How much blanking are you using? If you blank the edges that half inch does it stop? Then if it stopped try to increase the amplitude to refill the screen, does it stop?
What resolution are you running?
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A Rogers
Joined: 14 Feb 2011
Posts: 133
Location: Toronto On
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| Posted: Sun Apr 17, 2011 8:53 pm Post subject: |
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25% on the right and 75% on the left, (the tubes are worn off center) Changing the blanking to 100% or to 0% doesn't seem to have any effect, amplitude is -40% height and +19% width. resolution is 720p @ 96hz. not sure if its related, but at 1080p @60hz I get terrible streaking.
/e
I think I'm going to try using a different pc.. I don't trust the ati pos in this pc.
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A Rogers
Joined: 14 Feb 2011
Posts: 133
Location: Toronto On
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| Posted: Sun Apr 17, 2011 9:55 pm Post subject: |
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yup, turns out the high-end 1 1/2 year old ati 4890hd was the problem, not the 15 year old projector.
Last edited by A Rogers on Sun Apr 17, 2011 10:06 pm; edited 1 time in total
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Sun Apr 17, 2011 10:06 pm Post subject: |
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| A Rogers wrote: | | yup, turns out the high-end 1 1/2 year old ati 4900hd was the problem, not the 15 year old projector. |
Analog 1. Digital 0.
Punny
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Tech support for nothing
CRT.
HD done right!
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sun Apr 17, 2011 10:08 pm Post subject: |
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You know, its kinda odd that the internal test grid did it also.
But it just goes to show, always rule out the source as the problem.
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A Rogers
Joined: 14 Feb 2011
Posts: 133
Location: Toronto On
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| Posted: Sun Apr 17, 2011 10:23 pm Post subject: |
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| macgyver655 wrote: | You know, its kinda odd that the internal test grid did it also.
But it just goes to show, always rule out the source as the problem. |
oh well, at least I know I've got a good spare deflection board 
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Jeremy112
Joined: 28 Sep 2006
Posts: 2649
Location: Fond du Lac, WI
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| Posted: Mon Apr 18, 2011 4:30 pm Post subject: |
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The XG was never a problem for me, it was everything I had hooked up to it 
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