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Christ
Joined: 07 Dec 2016
Posts: 2
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| Posted: Thu Dec 08, 2016 11:17 am Post subject: Barco Graphics 801S |
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All,
I'm currently having a problem with my 801s.
If I turn it on with a dark (almost black) source everything is good.
If I turn it on with a light (say white) source the image is way to green.
This happens on port 3 and 5.
The way the color is stays untill it is being turned off (standby) and on again. The input at that time is responsible how the color will be.
Any suggestion on where to look for the solution?
PS. I have a BD801s for spare parts.
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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 Dec 08, 2016 2:55 pm Post subject: |
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When it is far too green, put up the internal test pattern. Is the test pattern too green?
There are three video amplifiers over each CRT socket:
http://www.curtpalme.com/Barco500_Layout12.shtm
(yours are in an aluminum case and look a bit different than the above).
All three are the same. Switch the green with the red, and see if the problem changes to a red image.
Also what is your signal source?
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Christ
Joined: 07 Dec 2016
Posts: 2
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| Posted: Thu Dec 08, 2016 3:56 pm Post subject: |
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| Curt Palme wrote: | When it is far too green, put up the internal test pattern. Is the test pattern too green?
There are three video amplifiers over each CRT socket:
http://www.curtpalme.com/Barco500_Layout12.shtm
(yours are in an aluminum case and look a bit different than the above).
All three are the same. Switch the green with the red, and see if the problem changes to a red image.
Also what is your signal source? |
Yes, everything becomes to green. Also in the test patterns, the white isn't white, but has a greenish tint.
I already swapped the amplifiers for red and green.
I also swapped the amplifier from a donor DB801s.
The problem still stayed and only for the green, so I doubt it is in the amplifier.
What I find the strangest factor is that upon turning the PJ on that defines how it is going to be for the entire run.
PS. I have a scope and a fluke multimeter so I can measure some stuf if you want some data.
The source is a Holo3D card. This holo3d (used as scaler) gets it's source from a laserdisc player, or DVD player (or sometimes a hometheater PC over HDMI)
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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 Dec 08, 2016 6:28 pm Post subject: |
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OK, my next guess then is that the focus block is bad. That drives the G2 levels, and I have seen them drift before. Try swapping that out of the other chassis.
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