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pat
Joined: 01 Mar 2008
Posts: 3
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| Posted: Sat Mar 01, 2008 8:17 am Post subject: Astigmatism Adjustment for Barco Data 650 |
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Hello together,
I've got difficulties adjusting the Astigmatism for my CRT.
I found the article in the advanced procedures section but this doesn't help me, because the tubes are different
from the described.
I made some photos from the green tube with an extract from the tube replacement manual.
Can anybody tell me which ring/magnet is for which adjustment (PM Stigmator, 2-pole magnet) ?
Do the white rings have any function (or how should I use them) ?
Greetings
Pat
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pat
Joined: 01 Mar 2008
Posts: 3
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| Posted: Tue Mar 04, 2008 5:05 pm Post subject: |
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No one any idea ? Is that CRT to old ?? 
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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: Tue Mar 04, 2008 5:29 pm Post subject: |
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It almost looks like the shafts have been taken off? NOrmally missing shafts means a dummy set of rings that don't do anything.
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Person99
Joined: 09 Mar 2006
Posts: 4899
Location: Flower Mound, TX
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| Posted: Tue Mar 04, 2008 5:34 pm Post subject: |
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What Curt said. Those little which clips with a "U" in them should have a knob sticking out of them. That is how you spin the rings with teeth in different directions (which is what causes the magnetic field to vary direction).
_________________
Dave
A train station is where the train stops. A bus station is where the bus stops. On my desk, I have a work station....
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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: Tue Mar 04, 2008 6:13 pm Post subject: |
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I've got lots of 4 pole spares. If your dots flare out evenly though, then you're fine, and you don' t need new astig magnets.
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pat
Joined: 01 Mar 2008
Posts: 3
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| Posted: Tue Mar 04, 2008 7:43 pm Post subject: |
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Thank you for the answers.
It seems that the knobs are missing. No one of the tubes does have such a knob.
However, if i adjust eg. "BA" then the flare moves its position.
So my problem is what is "2-Pole" and what is "PM Stigmator" and what the "2-pole magnet" ?
If I follow the instruction here: http://www.curtpalme.com/Astig.shtm
| Quote: | | ....The pair of tabs/magnets closest to the CRT socket are called the 2 pole magnets and have the most affect on astigmatism. The second set closest to the lens are the 4 pole ones, and are more or less a fine tuning of the 2 pole ones. The 6 pole magnets on some projectors are an even finer tuning of astig.... |
So "BA" should be the 2 pole magnets. But is "4 pole" = "PM Stigmator" and/or do I have a 6 pole magnets for finer tuning ? 
Greetings
Pat
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