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bohnenblust
Joined: 12 Jun 2008
Posts: 17
Location: Dallas, Tx
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| Posted: Mon Jul 07, 2008 7:18 pm Post subject: Barco Graphics 808s horizontal lines |
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New to CRT PJ and cant figure this one out for the life of me.
I cant figure out what the horizontal lines on the picture in the darker images is. It appears to be in the blue realm, but I am not sure
I am running a progressive DVD player with a composite transcoder to the RGBHV input in the back of the CRT.
Thanks
Adam
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87" screen
(DIY not painted yet.) |
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Mon Jul 07, 2008 8:34 pm Post subject: |
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Adam disconnect all input sources. Do you still see the diagonal lines with no input signal ? Next reduce brightness and contrast and look through the lenses at the CRT's themselves.
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bohnenblust
Joined: 12 Jun 2008
Posts: 17
Location: Dallas, Tx
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| Posted: Tue Jul 08, 2008 1:14 am Post subject: |
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How do you keep the CRT on with no input?
It was on the blue face But it isn't moving at all could it be burn?
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Jul 08, 2008 1:37 am Post subject: |
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The point is the with the projector turned on and no input the tubes should all be dark. Is the Blue CRT still lit ?
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bohnenblust
Joined: 12 Jun 2008
Posts: 17
Location: Dallas, Tx
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| Posted: Tue Jul 08, 2008 1:42 am Post subject: |
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Ahhhh, Yes the blue tube is still lit and it has a lot of noise on it including flashes on the bottom.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Jul 08, 2008 1:59 am Post subject: |
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Double post... 
Last edited by Tom.W on Tue Jul 08, 2008 2:10 am; edited 2 times in total
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bohnenblust
Joined: 12 Jun 2008
Posts: 17
Location: Dallas, Tx
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| Posted: Tue Jul 08, 2008 2:01 am Post subject: |
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I have a spare PJ of the same specs with a very burnt blue.
Which should I try first?
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Jul 08, 2008 2:07 am Post subject: |
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Swap the Blue neck board. Sounds like a G2 short in the CRT though. Did it just suddenly happen ?
Last edited by Tom.W on Tue Jul 08, 2008 2:13 am; edited 1 time in total
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bohnenblust
Joined: 12 Jun 2008
Posts: 17
Location: Dallas, Tx
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| Posted: Tue Jul 08, 2008 2:09 am Post subject: |
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no it seemed to be on the crt the whole time I have had it.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Jul 08, 2008 2:16 am Post subject: |
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Do a search for Sencore on this forum.
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bohnenblust
Joined: 12 Jun 2008
Posts: 17
Location: Dallas, Tx
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| Posted: Tue Jul 08, 2008 2:19 am Post subject: |
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What is that?
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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bohnenblust
Joined: 12 Jun 2008
Posts: 17
Location: Dallas, Tx
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| Posted: Tue Jul 08, 2008 2:50 am Post subject: |
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Just changed the neck board and the lines appear to be lessend but when I viewed the tube with no input there was a constant blue flash at the bottom of the face. Is that a bad thing? it does not do that with the inpout on.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Jul 08, 2008 3:13 am Post subject: |
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Can you post a screen shot ?
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bohnenblust
Joined: 12 Jun 2008
Posts: 17
Location: Dallas, Tx
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| Posted: Tue Jul 08, 2008 3:14 am Post subject: |
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Sure of what the tube face or another movie?
It would be neat to see if the Sencore would help the tube.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Jul 08, 2008 3:18 am Post subject: |
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Blue tube face with no signal and projector on.
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bohnenblust
Joined: 12 Jun 2008
Posts: 17
Location: Dallas, Tx
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| Posted: Tue Jul 08, 2008 3:22 am Post subject: |
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I cant get it to show the little flare of the bottom after it has warmed up and the movie has been going for a while, not even the lines are apparent.
Ill try tomorrow.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Jul 08, 2008 3:31 am Post subject: |
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Sounds like maybe it's fixed. Reset the G2 levels.
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1031
Joined: 22 Mar 2006
Posts: 657
Location: Finland
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bohnenblust
Joined: 12 Jun 2008
Posts: 17
Location: Dallas, Tx
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| Posted: Fri Jul 11, 2008 10:30 pm Post subject: |
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How do I reset the g2 levels on the barco, I printed both the manuals and cant seem to find a process to do this.
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