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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Thu Feb 28, 2013 2:25 pm Post subject: BARCO 1209 problem |
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hi guys,
i have a barco 1209s with one pchc.
until now it work fine.
but 2 days ago it have a strange problem.
when the pchc display a white picture like
a windows folder the barco lost the picture.
but with a picture no white like blue yellow or anther color
it works fine.
anyone have an idea about this strange 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: Thu Feb 28, 2013 2:34 pm Post subject: |
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Check to see if the red light on the EHT board comes on when you lose the picture.
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Thu Feb 28, 2013 3:06 pm Post subject: |
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| Curt Palme wrote: | | Check to see if the red light on the EHT board comes on when you lose the picture. |
hi,thanks for the answer
but no,the red light on the eht board do not come on .
very strange,when the pchc display the
windows blue wallpaper the barco works fine
but if i open a folder with a withe background
the barco lost the picture....
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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: Thu Feb 28, 2013 3:08 pm Post subject: |
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My guess is that you're losing HV. When projecting an all white field, you're driving the HV section very hard, usually causing shutdown. I'm surprised that you don't have the shutdown light on, but it's possible for the HV to fail and to not have that light on.
My guess is still EHT board, quadrupler or splitter issues.
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Thu Feb 28, 2013 3:28 pm Post subject: |
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ok,
i swap the quadrupler but its same.
i go to swap splitter.
but i dont have eht board,i mut to
looking for one...
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Thu Feb 28, 2013 5:30 pm Post subject: |
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i try 2 quadruplers
1 splitter
1 EHT board
and i get the same issue 
someone have any idea ??
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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: Thu Feb 28, 2013 6:30 pm Post subject: |
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I think you need to determine whether the HV is shutting down. How do you get the picture back> Turning the set off and on again?
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Thu Feb 28, 2013 7:17 pm Post subject: |
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yes, i must turn it off and on again.
and the picture come back
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Thu Feb 28, 2013 9:13 pm Post subject: |
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Hi,
Could be a SMPS problem as well. Maybe the +17V or the H-SIZE-MAX settings have drifted due to aging parts. Do not try to adjust them by Yourself (risk of damage)!. If You have a spare SMPS board instead it would be worth trying...
Regards,
barclay66
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Fri Mar 01, 2013 11:01 am Post subject: |
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yes i try new quad ,plitter ,spms,eht board
and all boards(rgb,ect...)
and i get the same issue.
I'll take a hammer and kill it
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Fri Mar 01, 2013 11:56 am Post subject: |
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Hi,
If You swapped almost everything then it's quite probable that Your problem isn't caused by the projector. What happens if You connect another display device to Your source?
Regards,
barclay66
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Fri Mar 01, 2013 1:31 pm Post subject: |
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hi,thanks for your answer
i try with another computer.
i try it with a new cable...
i get same issue:when the computer display
dark picture the barco works fine,but if i open
a window with white background it loose the
signal and i must to close the white windows and restart
the barco...
i try too with blue ray player:
it is better the barco lose the picture sometimes only when the picture is
near white.
i dont need to restart the barco,the signal come back with a dark picture.
the only thing that i did not try are the rgb output amplifers and the cntroler ship and board,but i think that is not
the problem...
i understand nothing,very strange problem.....
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Fri Mar 01, 2013 4:14 pm Post subject: |
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| tromatus wrote: | | i understand nothing,very strange problem..... |
Indeed, this is weird. Something seems to get disturbed as soon as the white level on the picture rises above a certain value. Like Curt, I do believe it has something to do with the HV section. The brighter the picture gets, the more current is drawn from the HV supply. And it seems like some kind of overload behaviour.
Next idea: You have many LED indicators inside the Barco:
- One on the EHT board
- One on the V-Deflection board
- One on the H-Deflection board
- Several on the G2-Diagnostic board
- Several on the RBG input board
- Several on the controller board
- Possibly one on each RGB amplifiers
Could You verify what happens with these LEDs? Especially those on the G2-Diagnostic?
Could You describe their status at these three stages:
- Normal picture
- White picture (shortly before shut down)
- After shut down
Regards,
barclay66
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Fri Mar 01, 2013 6:20 pm Post subject: |
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| barclay66 wrote: | | tromatus wrote: | | i understand nothing,very strange problem..... |
Indeed, this is weird. Something seems to get disturbed as soon as the white level on the picture rises above a certain value. Like Curt, I do believe it has something to do with the HV section. The brighter the picture gets, the more current is drawn from the HV supply. And it seems like some kind of overload behaviour.
Next idea: You have many LED indicators inside the Barco:
- One on the EHT board
- One on the V-Deflection board
- One on the H-Deflection board
- Several on the G2-Diagnostic board
- Several on the RBG input board
- Several on the controller board
- Possibly one on each RGB amplifiers
Could You verify what happens with these LEDs? Especially those on the G2-Diagnostic?
Could You describe their status at these three stages:
- Normal picture
- White picture (shortly before shut down)
- After shut down
Regards,
barclay66 |
hi barclay66,thank you for your help
hi looked the cards's leds.this is what happens with these LEDs
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on the EHT board 1 red led
- Normal picture>>led OFF
- White picture (shortly before shut down)>>led OFF
- After shut down>>led OFF
-------------------------------------
on the H-Deflection board 1 red led
- Normal picture>>>OFF
- White picture (shortly before shut down)>>OFF
- After shut down>>OFF
------------------------------------
on the V-Deflection board 1 red led
- Normal picture>>go ON 5 seconds when the barco display picture and go OFF
- White picture (shortly before shut down) OFF
- After shut down go ON 5 seconds go OFF
---------------------------------------
on the RBG input board 2 leds 1 red one green
- Normal picture>>green ON red OFF
- White picture (shortly before shut down) green ON red OFF
- After shut down green off red go ON 10 seconds and go OFF
-----------------------------------------------
on each RGB amplifiers 1 green led(g2)
- Normal picture ON
- White picture (shortly before shut down) ON
- After shut down ON
----------------------------------------------
on the controller board 10 red leds
from the left to the right:
for Normal picture
for White picture (shortly before shut down)
and After shut down
led 1 ON
led 2 ON
led 3 FLASHES
led 4 OFF
led 5 ON
led 6 FLASHES
led 7 FLASHES
led 8 OFF
led 9 OFF
led 10 OFF
----------------------------------------
on the G2-Diagnostic board
- Normal picture ON>>all green leds ON red led OFF
- White picture (shortly before shut down) >>all green leds ON red led OFF
- After shut down >>all green leds ON red led OFF
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barclay66
Joined: 27 Jun 2011
Posts: 1304
Location: Germany
TV/Projector: Marquee 9500 Ultra
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| Posted: Fri Mar 01, 2013 10:59 pm Post subject: |
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Hi,
This is the designation of the controller LEDs:
LED 01 StandBy
LED 02 Main Power
LED 03 Processor Cycles (activity)
LED 04 I2C shorted
LED 05 Block Match (valid input signal)
LED 06 Error
LED 07 RCU (Remote)
LED 08 RCVDS
LED 09 PC
LED 10 Pause
So if LED No. 06 and 07 are flashing there is some kind of error going on that could have something to do with the remote control unit (refer to this http://www.curtpalme.com/Barco1208_Layout6.shtm).
I'm just not quite sure which kind of error that would be, sorry. It could be the controller itself or some supply line being off as mentioned before. Maybe someone with more knowledge can chime in...
Regards,
barclay66
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elpha
Joined: 13 Jan 2011
Posts: 138
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| Posted: Sat Mar 02, 2013 12:21 pm Post subject: |
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Look R762120s focus block.
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Sat Mar 02, 2013 4:37 pm Post subject: |
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hi ,i think that i found the problem....
when i cut blue tube the barco works fine
i can display full screen white picture and
barco not go off.
i swap rgb socket blue/red/green but the problem
occurs on the blue only.
my question:
anyone think that is the blue tube or,may be,the
g2 card??
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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: Sat Mar 02, 2013 6:58 pm Post subject: |
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Check your G2 settings, make sure the LEDs go off when you're in the service mode.
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Sat Mar 02, 2013 7:36 pm Post subject: |
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yes i check it.
the g2 leds are off in service mode
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tromatus
Joined: 19 Nov 2010
Posts: 66
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| Posted: Sat Mar 02, 2013 10:35 pm Post subject: |
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how can i do to test the blue tube.??
if the tube is hs im going to buy another...
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