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Barco 909 red tube problem

 
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kuquet



Joined: 22 Oct 2017
Posts: 6
Location: Europe France


PostLink    Posted: Thu Nov 01, 2018 9:47 pm    Post subject: Barco 909 red tube problem Reply with quote


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The 909 start, Green and blue are ok, but no picture on red tube

There is a orange glow at the base of the 3 tubes

Could you help me to diagnostic?

To test and find the defect board is it possible to invert cables on green and red tube without damage :
- only the 2 neck board cables without Vertical+horizontal scan connectors ?
- only Vertical+horizontal scan connectors without the 2 neck board cables ?

Or wath are possible defect board HOR DEF, VERT DEF, SMP2+G2, CONV,???..

Thank you

Regards
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Hulio



Joined: 15 Apr 2006
Posts: 357
Location: Belgium


PostLink    Posted: Fri Nov 02, 2018 12:01 am    Post subject: Reply with quote

Yes, it is ok to swap only the cables but you should swap the neckboards too.
Could be a defective RGB-driver board, vertical board or horizontal board too.
And don't forget to shut off the projector before you remove any board and cable/connector.
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Curt Palme
CRT Tech


Joined: 08 Mar 2006
Posts: 23920
Location: Langley, BC

TV/Projector: All of them!


PostLink    Posted: Fri Nov 02, 2018 3:17 pm    Post subject: Reply with quote

Most likely a bad neckboard. The chips on them can die, and they are not available. Custom made for Barco.

I do have spare working neck boards here if that is the issue. Swap the red to the green and vice versa to confirm. Definitely not a problem on the boards common to all three tubes.
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kuquet



Joined: 22 Oct 2017
Posts: 6
Location: Europe France


PostLink    Posted: Fri Nov 02, 2018 7:30 pm    Post subject: Reply with quote

Thank you for your help.

The problem was the focus board R7631395.

Regards
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