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Reference for G2 adjustement?

 
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Murillo




Joined: 30 Dec 2007
Posts: 109
Location: Sweden


PostLink    Posted: Mon Feb 13, 2017 8:20 pm    Post subject: Reference for G2 adjustement? Reply with quote


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Hello

Does anybody have a suggestion what to use as a reference for comparing the tubes when setting G2?

Best regards.
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Curt Palme
CRT Tech



Joined: 08 Mar 2006
Posts: 24296
Location: Langley, BC

TV/Projector: All of them!


PostLink    Posted: Mon Feb 13, 2017 9:53 pm    Post subject: Reply with quote

It depends on the make and model of the set. What set have you got?
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Tim in Phoenix




Joined: 21 Oct 2006
Posts: 4378
Location: Phoenix


PostLink    Posted: Mon Feb 13, 2017 11:05 pm    Post subject: Reply with quote

Hello

You may need to generate a test pattern called stairstep. It comes standard on some projectors; you may need a generator for others/
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cmjohnson




Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s


PostLink    Posted: Mon Feb 13, 2017 11:47 pm    Post subject: Reply with quote

As Curt said, it varies from model to model and there will be a manufacturer's recommendation to follow.

If you were to, for example, adjust a Marquee's G2 setting with the contrast at 60 and then do it again with the contrast at 30, you would get very different results.

You can start by identifying your projector. That should have been the very first thing to mention.
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Murillo




Joined: 30 Dec 2007
Posts: 109
Location: Sweden


PostLink    Posted: Tue Feb 14, 2017 9:08 am    Post subject: Reply with quote

My pj is Barco 1209 (the old one). Sorry I forgot to mention it.
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Murillo




Joined: 30 Dec 2007
Posts: 109
Location: Sweden


PostLink    Posted: Thu Feb 16, 2017 11:28 am    Post subject: Reply with quote

Anybody that can help me with this?
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cmjohnson




Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s


PostLink    Posted: Thu Feb 16, 2017 11:36 am    Post subject: Reply with quote

Your google fu is weak. A simple google search for the 1209 manual would have taken you right here:

http://www.curtpalme.com/Barco1208_Downloads.shtm


Learn to use Google. Ask it any question you'd ask us. It will often lead you right to what you want to find.
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Murillo




Joined: 30 Dec 2007
Posts: 109
Location: Sweden


PostLink    Posted: Thu Feb 16, 2017 12:41 pm    Post subject: Reply with quote

Thanks but I wanted to know what to use as a reference when setting the G2. For example if here is a good pattern or a section from a Movie that can be used as a reference when comparing the tubes. I searched but couldnīt find it on Google.


Best regards
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cmjohnson




Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s


PostLink    Posted: Fri Feb 17, 2017 12:38 am    Post subject: Reply with quote

http://www.curtpalme.com/docs/Barco1208_Black_Balance_Adjustment.pdf

It's also laid out in the installation manual, appendix B.

Follow the directions between these two documents and you'll get it.
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Curt Palme
CRT Tech



Joined: 08 Mar 2006
Posts: 24296
Location: Langley, BC

TV/Projector: All of them!


PostLink    Posted: Fri Feb 17, 2017 1:38 am    Post subject: Reply with quote

Here's what I do. Put up a stepped gray scale, from 0 to 100 IRE. SHort out the jumpers on the CRT socket, all of them. Put brightness and contrast to 60. Set the drives and black levels to 50 in the color balance menu. Set the G2 pots so that 0 IRE is just lit up on the tube face, not enough to light up on the screen.

Done.
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Murillo




Joined: 30 Dec 2007
Posts: 109
Location: Sweden


PostLink    Posted: Mon Feb 20, 2017 7:32 pm    Post subject: Reply with quote

Thanks
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