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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Sun Jul 21, 2013 3:36 am Post subject: |
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I also want to know that as my Ecp does drift some on convergence after it has warmed up
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crt king of black
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sun Jul 21, 2013 4:21 am Post subject: |
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It varies on different machines, im refering to Barcos. What youre seeing is normal, im interested in the time before touchup is required, hopefully in months, as this is what i expect from an NEC.
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the big E
Joined: 20 Apr 2013
Posts: 1928
Location: speedwell Tn.
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| Posted: Sun Jul 21, 2013 4:50 am Post subject: |
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| CasetheCorvetteman wrote: | | It varies on different machines, im refering to Barcos. What youre seeing is normal, im interested in the time before touchup is required, hopefully in months, as this is what i expect from an NEC. |
I know of corse my nec may not need any touch up after its warmed up if I can get it to where I can use it
I haven't noticed my 10pg to drift before it did like it has so it may never drift but only time will tell
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crt king of black
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sun Jul 21, 2013 6:43 am Post subject: |
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My 9PG never did much at all, even after 6 months it was pretty much right where i left it. I was using most of the tube face and very little keystone, but using such a big area on the PG did require a fair amount of pincushion and a reasonable amount of point was also used where main convergence settings did not quite have the range. It was always solid as a rock and ran that way for over 2 years without a hitch.
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Phoenixed
Joined: 13 Oct 2011
Posts: 514
Location: The mitten
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| Posted: Sun Jul 21, 2013 8:21 am Post subject: |
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My G90 wandered a lot. I wonder if its an upper echelon 9inch thing. No offense to anyone.
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Planar PD-8150/Runco LS-5
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Sun Jul 21, 2013 9:03 am Post subject: |
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| CasetheCorvetteman wrote: | | So how long is a reasonable time with no drift to be considered normal? And how far out of alignment do you consider to be acceptable? |
I am still wrestling with a perfect mechanical setup since my projector is not standard. I don't like drift any more than the next person so I will continue until I get a perfect mechanical setup and then I will let you know if it drifts. To this end I am fitting a another LC setup. I suspect drift won't be a major issue if the electronic convergence is only performing minor corrections.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sun Jul 21, 2013 10:14 am Post subject: |
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I know your machine is pretty far from stock yes, and i do agree totally that the less electronic correction the better, but id love to know where the drift during warmup is coming from since my PG didnt really do it at all and the XG was extremly minor and only on red, which due to previous owner over tightening the long pins that hold the red in place one was broken and the red tube moved slightly from cold to warm.
Everything is tight on the tubes and the housings are all tight, but i dont think its that cause its not all over the whole screen that it moves.
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Sun Jul 21, 2013 10:27 am Post subject: |
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| CasetheCorvetteman wrote: | I know your machine is pretty far from stock yes, and i do agree totally that the less electronic correction the better, but id love to know where the drift during warmup is coming from since my PG didnt really do it at all and the XG was extremly minor and only on red, which due to previous owner over tightening the long pins that hold the red in place one was broken and the red tube moved slightly from cold to warm.
Everything is tight on the tubes and the housings are all tight, but i dont think its that cause its not all over the whole screen that it moves. |
Old caps perhaps on your convergence board??
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sun Jul 21, 2013 1:37 pm Post subject: |
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In a Cine 9???
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Sun Jul 21, 2013 10:43 pm Post subject: |
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| CasetheCorvetteman wrote: | | In a Cine 9??? |
Yeah sure. I think if you read any references in this forum to Cine/909 you will find Curt and Craig and MP talk about poor quality caps in this projector. I believe Curt replaces certain Caps when he sells a Cine/909 projector. I don't know if they are convergence specific caps but I am almost certain the are SMPS caps and as you know that can effect all manner of things including convergence stability.
You would know far more about ESR than most so perhaps could could use an ESR meter to check some caps.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Mon Jul 22, 2013 1:13 am Post subject: |
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Hmmm... Roger that, i might have to check it out i guess, never expected it would be an issue in one of these...
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ElTopo
Joined: 07 Nov 2006
Posts: 1640
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| Posted: Fri Aug 09, 2013 9:56 am Post subject: |
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Checked convergence on the Cine9 i have here.
After the setup i disconnect from A/C for some hours.
Convergence is rock solid after powering up again, no drift at all.
ElTopo
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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: Fri Aug 09, 2013 1:03 pm Post subject: |
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| CasetheCorvetteman wrote: |
Everything is tight on the tubes and the housings are all tight, but i dont think its that cause its not all over the whole screen that it moves. |
that is exceptionally unusual in any CRT, IMHO. The 909/Cine chassis is known for overall drift, but only certain zones... man, I'm not sure.
FYI, the convergence is all digital, stored on the system board, until the very end stage, where D/A converters change the data to analog. I can't see it being the system/controller board as a result, and I haven't had those issues on the convergence output board either.
To eliminate the focus and astig boards, disconnect the wire harnesses going between them. That will disconnect those boards from the tubes in essence, and you'll be out of astig and focus, but you can still track whether the convergence stops drifting in the affected areas.
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Sat Aug 10, 2013 1:42 pm Post subject: |
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Yeah mate its sharp all the time right from cold start, but convergence is out for a good 30-45 minutes.
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