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kuquet
Joined: 22 Oct 2017
Posts: 6
Location: Europe France
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| Posted: Thu Nov 01, 2018 9:47 pm Post subject: Barco 909 red tube problem |
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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: 494
Location: Belgium
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| Posted: Fri Nov 02, 2018 12:01 am Post subject: |
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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: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Fri Nov 02, 2018 3:17 pm Post subject: |
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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
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| Posted: Fri Nov 02, 2018 7:30 pm Post subject: |
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Thank you for your help.
The problem was the focus board R7631395.
Regards
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