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Tubes emitting light on fade to black.

 
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huggy



Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia

Posted: Mon Sep 08, 2008 8:54 pm    Post subject: Tubes emitting light on fade to black.

I'm in the process of setting up my runco 1101,and realised the tubes are emitting light at full black.I've reduced contrast and brightness to 0 and still light can be seen.I've read that the issue could be G2 related.
I comfortable inside and outside the projector,I know how to turn the pots off but that's it.I'm a complete and utter noob and this is the firt time I've set up a crt.

Can anyone walk me through the whole g2 setup process on the 1101 (aka 1209s)

Thanks in advance
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Ile



Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland

Posted: Tue Sep 09, 2008 7:59 am    Post subject:

Check page 35
http://www.curtpalme.com/docs/BarcoGraphics1209s_Install.pdf
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huggy



Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia

Posted: Tue Sep 09, 2008 8:30 am    Post subject:

Ile wrote:
Check page 35
http://www.curtpalme.com/docs/BarcoGraphics1209s_Install.pdf

I already did this however,I just dont know what to do when I have swithced the LEDs off.Once switched off I've gone back to G2 adjustment to no avail.It just tells you to turn the led's off.
I'm not certain as to HOW to adjust G2.
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Ile



Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland

Posted: Tue Sep 09, 2008 11:59 am    Post subject:

Then adjustment is done.

When leds are off at that menu, G2 adjustment is correct. Leds should be off also during normal using after few minutes warming period.

Are you sure that your source gives correct black level? Check menu (source) for some black level settings...

Some light coloration in tubes is normal with black picture, but it shouldn't be seen in screen. ABL pulse can also cause some light to upper/lover edge of tube, that wont go away with G2 pots.
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huggy



Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia

Posted: Tue Sep 09, 2008 12:49 pm    Post subject:

Thanks Ile for your response.
So correct me if I am wrong,once I get into the g2 menu I turned the pots until the leds go off,and just leave them off with no further action?
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Ile



Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland

Posted: Tue Sep 09, 2008 1:28 pm    Post subject:

Yes, that's correct method.
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huggy



Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia

Posted: Wed Sep 10, 2008 5:05 am    Post subject:

Thank's Ile,I did set the g2 and all is fine now,I use the start of cars as reference and get full fade to black for a couple of seconds and then the slightest hit of light,is this normal or something else I can tweak?
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Ile



Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland

Posted: Wed Sep 10, 2008 7:24 am    Post subject:

Now you need to adjust brightness with some pluge test pattern, dve or thx optimiser from some Lucas film is good for that. One method (without test pattern) is pick dark scene from some 2.35:1 AR movie and adjust brightness so that black inside picture area is at same level (or one click lighter) what unused raster in top/bottom black bars in your screen.

You probably wont get full fade to black without sacrifying some darkest grays, but with low level gamma boost you will get both.
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huggy



Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia

Posted: Wed Sep 10, 2008 7:39 am    Post subject:

Will do,thanks for all your help Thumbs Up
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kal
Forum Administrator


Joined: 06 Mar 2006
Posts: 18114
Location: Ottawa, Canada

TV/Projector: JVC DLA-NZ7

Posted: Wed Sep 10, 2008 2:19 pm    Post subject:

My greyscale and colour calibration for dummies will also walk you through how to measure and set gamma correctly and make sure that brightness/contrast are also set right (as well as greyscale of course).

See the banner at the very bottom of ever forum page:



Kal

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My basement/HT/bar/brewery build 2.0
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Gino



Joined: 22 Apr 2006
Posts: 1363
Location: Trinity Beach, AUSTRALIA

Posted: Thu Sep 11, 2008 3:55 am    Post subject:

I've never actually seen that banner, I wonder what other banners I'm missing out on.
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( B ) ( G ) ( R ) Blendzilla Down Under ( R ) ( G ) ( B ) - Tubes of Fury
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huggy



Joined: 02 Aug 2008
Posts: 927
Location: Melbourne,Australia

Posted: Thu Sep 11, 2008 7:19 am    Post subject:

Wow,I'm sold on this,I like the Idea of calibrating my own displays. Thumbs Up
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