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g2 barco retrographics 808s

 
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johnyfazer




Joined: 14 Jan 2014
Posts: 55
Location: Poland


PostLink    Posted: Wed Nov 08, 2017 2:00 am    Post subject: g2 barco retrographics 808s Reply with quote


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Hi. I want to set the grayscale scale in my barco 808 retrographics. I want to make a colorimeter. I need to set G2. Execute command "g2 control", turn the potentiometers. Red LED goes out / ok /. The green LED goes out / ok /. I do not want to turn off the light on the blue lamp / wrong Sad . Any ideas? Sorry for my english - Google Translator
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km987654




Joined: 25 Jul 2007
Posts: 2852
Location: Australia

TV/Projector: Barco BG809s


PostLink    Posted: Wed Nov 08, 2017 7:33 am    Post subject: Reply with quote

Those pots, even though their values may have changed, are a good indicator of correct G2. So why don't you want to adjust Blue G2?
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Hulio




Joined: 15 Apr 2006
Posts: 469
Location: Belgium


PostLink    Posted: Wed Nov 08, 2017 10:49 am    Post subject: Reply with quote

Maybe I'm wrong, but I guess he is telling that the G2 led of the blue tube won't go off when adjusting ??
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johnyfazer




Joined: 14 Jan 2014
Posts: 55
Location: Poland


PostLink    Posted: Wed Nov 08, 2017 11:25 am    Post subject: Reply with quote

That's what I want to understand. Does the blue also have to go out? In the Instruction we write about the three lights on the lamps
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Hulio




Joined: 15 Apr 2006
Posts: 469
Location: Belgium


PostLink    Posted: Wed Nov 08, 2017 11:57 am    Post subject: Reply with quote

Yes, the leds must go off on all three colours when in G2 adjustments menu. I hope you adjust the right pots on the G2/diagnostic board (behind the focus block), and not the pots on the neck cards.
Here you find them.
http://www.curtpalme.com/Barco808_Layout7.shtm
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Curt Palme
CRT Tech



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

TV/Projector: All of them!


PostLink    Posted: Wed Nov 08, 2017 3:07 pm    Post subject: Reply with quote

If the LED on the blue tube does not go out, you may have a bad CRT socket/video amp, or a bad blue tube. When that used to happen and the rest of the set worked fine, I'd simply set the gain of the blue tube by eye. Was very common in a planetarium installation I used to take care of, with high hours on the tubes.
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