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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Mon Oct 12, 2015 12:22 pm Post subject: barco 808 help |
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hi i have a barco 808 problem.
in fact yesterday when I started it and it
around worked one hour .
after the picture was extremely slowly extinguished until no
longer emit light.
now it start and run fine.
but it dont display red blue or green picture.
i check EHT led,controler leds,
g2 board leds and vertical board led.
all leds are ok.
i swap every board,quadrupled and splitter too.
and i get same problem....
the only boards tha i not swap are the convergeances boards
under the tubes.
or i put it in the waste ?  )
thank you guys
and sorry for my bad english
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Mon Oct 12, 2015 12:43 pm Post subject: |
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I just start it yet.and , if I look into the tubes ,i can see a very dark picture .
but it disappears in a few seconds .
every starting the barco i get the same thing...
ha yes,one thing.
few times ago i change the tubes.
i put p16lnp tubes.
the 808 G run fine with this tubes or i must do
electronic mods to the nec boards?
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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 Oct 12, 2015 1:28 pm Post subject: |
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Check to see if the tube filaments are glowing normally. It sounds like they may be going out, or are not lit.
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Mon Oct 12, 2015 2:16 pm Post subject: |
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yes,the tube filaments are glowing normally on
3 tubes.
curt,can you tell me if i can put
P16LNP tubes into 808 G or D without electronic
mods?
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Mon Oct 12, 2015 2:36 pm Post subject: |
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Can you see the internal setup menu and brightness and contrast settings ?
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Mon Oct 12, 2015 3:02 pm Post subject: |
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yes when i start the barco i can see
the setup menu but it is very dark.
and it gradually disappear in a few seconds..
and the tubes faces goes dark
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Tue Oct 13, 2015 2:22 pm Post subject: |
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no one have an idea about P16LNP tubes??
can i put P16LNP tubes into 808 G or D without electronic
mods?
thanks
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CasetheCorvetteman
Joined: 09 Nov 2008
Posts: 6326
Location: Australia
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| Posted: Tue Oct 13, 2015 3:18 pm Post subject: |
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What tubes were in it originally?
_________________
Barco Cine 9, ,Sony VPL570ES 4K SXRD, 135" OZ Theatre Majestic 16:9 screen, Denon X6700in preamp mode, 2x 7ch Tonewinner amps, 2x Tonewinner 15" subs, 2x 10" subs, 7.2.6...
RUNCO DTV991 LC ( NEC XG 852 LC ) 100" 4:3 screen, H/K AVR 7.1...
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Tue Oct 13, 2015 3:32 pm Post subject: |
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| tromatus wrote: | no one have an idea about P16LNP tubes??
can i put P16LNP tubes into 808 G or D without electronic
mods?
thanks |
You have Barco 808 (no "s") I suppose.
If yes there are no problem to use P16's instead stock 180DVB22's
The tubes have same pinouts.
So the issue are elsewhere.
Where are you from?
_________________
Domenico (Barco fan!)
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Tue Oct 13, 2015 6:23 pm Post subject: |
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| Decibel wrote: | | tromatus wrote: | no one have an idea about P16LNP tubes??
can i put P16LNP tubes into 808 G or D without electronic
mods?
thanks |
You have Barco 808 (no "s") I suppose.
If yes there are no problem to use P16's instead stock 180DVB22's
The tubes have same pinouts.
So the issue are elsewhere.
Where are you from? |
yes i have un 808G.
and my p16 are absolutely news!!
i am from france
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Tue Oct 13, 2015 10:19 pm Post subject: |
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Sounds like an SMPS problem. Check your voltages at the various test points. Search the site there is ample information on this.
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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: Wed Oct 14, 2015 4:44 am Post subject: |
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THe tubes should be compatible. Are you using a 7621705 or 7621706 power supply in the set?
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Wed Oct 14, 2015 7:31 am Post subject: |
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| Curt Palme wrote: | | THe tubes should be compatible. Are you using a 7621705 or 7621706 power supply in the set? |
yes,i am using R7621705 .
i try 3 SMPS boards and i get same issue>no picture
I thought if there was a power problem the red LED of the focus board or the red led
on EHT board was light on.
mine is light of and all green leds are light on.
red led on EHT board is light of...
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Wed Oct 14, 2015 10:02 am Post subject: |
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| tromatus wrote: | | Curt Palme wrote: | | THe tubes should be compatible. Are you using a 7621705 or 7621706 power supply in the set? |
yes,i am using R7621705 .
i try 3 SMPS boards and i get same issue>no picture
I thought if there was a power problem the red LED of the focus board or the red led
on EHT board was light on.
mine is light of and all green leds are light on.
red led on EHT board is light of... |
To eliminate the SMPS you should check the necessary voltages. If they are OK you can rule out the SMPS. Until you do that you can't. You have an issue that is difficult to trace so you really need to take a methodical approach otherwise you could simple be substituting parts that have different issues and never find a solution.
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Wed Oct 14, 2015 5:12 pm Post subject: |
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ok thanks.
i am going to check the SMPS voltages
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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: Wed Oct 14, 2015 8:42 pm Post subject: |
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There's no way that THREE power supplies have the same problem, especially when the main problem is that they go dead. Don't bother checking the voltages except for the 17 volt test point, covered in the Barco section of the main site.
Measure the 6.3 volt filament right at the tube socket, and if your meter can measure 1000 volts DS, measure the G2 voltage at each tube socket as well.
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km987654
Joined: 25 Jul 2007
Posts: 2874
Location: Australia
TV/Projector: Barco BG809s
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| Posted: Wed Oct 14, 2015 9:13 pm Post subject: |
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| Curt Palme wrote: | There's no way that THREE power supplies have the same problem, especially when the main problem is that they go dead. Don't bother checking the voltages except for the 17 volt test point, covered in the Barco section of the main site.
Measure the 6.3 volt filament right at the tube socket, and if your meter can measure 1000 volts DS, measure the G2 voltage at each tube socket as well. |
Thats great advice Curt. Do bother checking but go check anyway. Its definitely possible that all three PS have out of whack 17v and filament voltage as you point out due to age if nothing else. So yes check those.
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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: Wed Oct 14, 2015 11:15 pm Post subject: |
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Maybe, but not for the problem described. Now I'm trying to narrow down WHAT voltage is missing at the tube. Low filament or low/absent G2 can do this. The fading out part is what has me puzzled. That's not normal Barco behavior.
Once I get some readings off the tube socket, not at the power supply, but at the tube socket, then I'll know more.
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