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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Mon Aug 03, 2009 9:51 am Post subject: |
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| Tom.W wrote: | | Your Blue tube needs a bit of adjustment........... |
Yes ... little adjustment of deflection yoke, I know, thank you 
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Domenico (Barco fan!)
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Ile
Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland
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| Posted: Mon Aug 03, 2009 10:02 am Post subject: |
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Are you using new s series input and driver boards with 7621735 rgb amps from non s 808?
Those amps could be problem, because 75 MHz rgb amps used in BD808s are different. 7621736 rgb amps have jumper, so you can select which driver board is compatible.
Jumper affect to IBCL signal that controll driver to limit beam current. I'm not sure if this is proplem, but it's not too hard to mod one amp and see if it's help.
7621735 (808) -> 7621736 (D808s)
Remove R7 from rgb amp and chance C6 (100uF) to 10uF.
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Mon Aug 03, 2009 10:31 am Post subject: |
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| Ile wrote: | | Are you using new s series input and driver boards with 7621735 rgb amps from non s 808? |
No Ile. I use normal (non s) input and driver boards from BG808
rgb amps are R7621735
| Ile wrote: | Those amps could be problem, because 75 MHz rgb amps used in BD808s are different. 7621736 rgb amps have jumper, so you can select which driver board is compatible.
Jumper affect to IBCL signal that controll driver to limit beam current. I'm not sure if this is proplem, but it's not too hard to mod one amp and see if it's help.
7621735 (808) -> 7621736 (D808s)
Remove R7 from rgb amp and chance C6 (100uF) to 10uF. |
Yes I found C6 (100uF) but not found R7 in the RGB amp, there is a R7 in the socket board (R762508)
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Domenico (Barco fan!)
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Ile
Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland
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| Posted: Mon Aug 03, 2009 3:19 pm Post subject: |
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| Decibel wrote: | No Ile. I use normal (non s) input and driver boards from BG808
rgb amps are R7621735 |
Ok, then it's something else.
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Tue Aug 04, 2009 11:29 am Post subject: |
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The issue was a bad RGB amp! 
And now that I can view menu, I found there is a IC2 error in some geometry settings.
I must check wire connect in convergence driver or swap it with another board.
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Domenico (Barco fan!)
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VideoGrabber
Joined: 09 Apr 2006
Posts: 933
Location: Michigan
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| Posted: Tue Aug 04, 2009 1:22 pm Post subject: |
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Dom,
I'm really glad to hear that you've located the problem (and it can be so easily corrected), especially since we were running out of ideas.  But you only had one bad RGB amp, right? Not all 3?
> If I restore default 75 mhz neckboards come back the problems! The tubes bright intense like lamps!!! <
With this written in the plural, it pretty much eliminates an RGB amp issue, since it's highly unlikely you'd have problems with more than one. So that would tend to lead analysis astray.
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- Tim
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Tue Aug 04, 2009 1:41 pm Post subject: |
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Tim
I have language problems (I'm italian and must use translator) 
However ... during my tests I used bad rgb AMP.
When relative tube bright very (VERY) intense light I disconnected power quickly for fear to break something.
Now I must to solve IC2 error 
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Domenico (Barco fan!)
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VideoGrabber
Joined: 09 Apr 2006
Posts: 933
Location: Michigan
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| Posted: Tue Aug 04, 2009 1:52 pm Post subject: |
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> I have language problems (I'm italian and must use translator) <
You're doing fine.
> Now I must to solve IC2 error <
Technically, it's I2C. You didn't mention which error# you got, but I'll point out that sometimes these errors are as easy to resolve as simply re-seating the convergence board. I suspect you've already tried that, but just in case.
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- Tim
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Wed Aug 05, 2009 9:20 am Post subject: |
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| Decibel wrote: | | The issue was a bad RGB amp! |
Probably there's a bad resistor (SR1)
| Decibel wrote: | | And now that I can view menu, I found there is a IC2 error in some geometry settings. |
Stupid issue!
There was two wire disconnect from convergence driver to convergence output!
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Domenico (Barco fan!)
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Decibel
Joined: 31 May 2007
Posts: 904
Location: Roma - Italia
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| Posted: Wed Aug 05, 2009 11:18 am Post subject: |
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| Decibel wrote: | | Decibel wrote: | | The issue was a bad RGB amp! |
Probably there's a bad resistor (SR1) |
Yesssssssssssssssssssss
And now the projector working fffffffffffffffffffffffffffffffffffineeeeeeeeee
There is the last adjustment: heater voltage because I use 808s SMPS..
Thanks to all!
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Domenico (Barco fan!)
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VideoGrabber
Joined: 09 Apr 2006
Posts: 933
Location: Michigan
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| Posted: Wed Aug 05, 2009 2:03 pm Post subject: |
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Congratulations! You had quite a few obstacles and challenges, and you overcame them all. That's got to be a good feeling. Well done.
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- Tim
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