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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Mon Aug 05, 2013 11:15 am Post subject: barco 1209 brightness problem |
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hi guys,
from few days ago my barco
1209S loss brightness about 50%.
this problem is on the 3 tubes.
the brightness become very very low on the 3 tubes.
its very dificult to see windows desktop on
the screen.
anyone have an idea about this problem?
thank you
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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: Mon Aug 05, 2013 1:02 pm Post subject: |
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Check the filament voltage, but most likely the G2 board is bad, or I guess it could be one of the video boards,. either the RGB switcher or quad decoder as well. I've got all of them in stock.
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Mon Aug 05, 2013 1:52 pm Post subject: |
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| Curt Palme wrote: | | Check the filament voltage. |
how can i do it?
i think the g2 board is bad too..
i have a set of video cards ,i go to swap it
thanks
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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: Mon Aug 05, 2013 1:54 pm Post subject: |
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There should be 6 volts DC on the filament pins on the CRT socket.
Also, are the internal manus dim as well?
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Mon Aug 05, 2013 2:53 pm Post subject: |
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| Curt Palme wrote: | There should be 6 volts DC on the filament pins on the CRT socket.
Also, are the internal manus dim as well? |
yes,the brigness and focus of internal menus are ok.
the problem is only on the picture
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Mon Aug 05, 2013 6:17 pm Post subject: |
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i swap the quad decoder card.
the brightness is ok now
but,i tred to adjust the g2.
i go to service menu and i choose
g2 adjustment but when i turn very slowly the
g2 pot on the g2 board the green light on the tubes amp
dont shutdown
the light it is always green.
anyone have an idea?
thanks
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Tue Aug 06, 2013 7:51 am Post subject: |
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Have you tried a monitor on the PC to see if the image is bright or dull?
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Tue Aug 06, 2013 11:01 am Post subject: |
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| km987654 wrote: | | Have you tried a monitor on the PC to see if the image is bright or dull? |
the problem is resolved.
the R762720 board was bad.
i swap it,everything are good now.
brightness and g2's 
i am happy!!
i am looking for one
R762720 to keep spare
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