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NewbieDAN
Joined: 09 Mar 2006
Posts: 319
Location: Bunbury Western Australia
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| Posted: Tue Dec 23, 2008 1:29 am Post subject: Tube beam collapse on shutdown 1209s |
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Guys,
how normal is it to have a diminishing circular beam collapse on shutdown of BarcoGraphics 1209s? It's not going to spot burn as it starts off very broad, and gets smaller, finishing about 5mm in diameter. I have a friend who has the same consecutive serial number 1209s from the same source, he is seeing the same issue. Our BG's run PT22-30 green tubes, and LPB's for blue and red.
Is this 'common' or do I need to be concerned.
Dan
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mike calcott
Joined: 18 May 2006
Posts: 307
Location: Australia
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| Posted: Tue Dec 23, 2008 1:32 am Post subject: |
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I think you should have kept the G70 as a backup
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Tue Dec 23, 2008 1:47 am Post subject: |
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Hello
Did this just start happening? One tube or all? You may have issues with the spot kill system.
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NewbieDAN
Joined: 09 Mar 2006
Posts: 319
Location: Bunbury Western Australia
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| Posted: Tue Dec 23, 2008 2:16 am Post subject: |
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It has happened since I got it, and identical to the other 1209s we got at the same time. Pretty sure it's with all tubes, I'd have to check, but definately green.
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NewbieDAN
Joined: 09 Mar 2006
Posts: 319
Location: Bunbury Western Australia
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| Posted: Tue Dec 23, 2008 2:17 am Post subject: |
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| mike calcott wrote: | | I think you should have kept the G70 as a backup |
It smokes the G70 Mike.....hope I don't need a backup, but I do have an XGLC in a crate in the shed.
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NewbieDAN
Joined: 09 Mar 2006
Posts: 319
Location: Bunbury Western Australia
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| Posted: Tue Dec 23, 2008 2:18 am Post subject: |
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| Tim in Phoenix wrote: | Hello
Did this just start happening? One tube or all? You may have issues with the spot kill system.
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It's got the soft edge modulation and was setup in a commercial blend. Unusual for both projectors to be exibiting the same 'problem'?
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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 Dec 23, 2008 2:50 am Post subject: |
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I've seen this with Panasonic tubes before. If it's a very dull 'fireworks' explosion in the middle of the tube without actually going to a defined dot, don't worry about it.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Dec 23, 2008 3:15 am Post subject: |
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Sounds like a contamination G1 short in the CRT if only on one tube. Not much to worry about though...
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SisterOfMercy
Joined: 31 Oct 2007
Posts: 155
Location: Zwart Nazareth, The Netherlands
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| Posted: Tue Dec 23, 2008 8:47 pm Post subject: |
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I can see this as well on my 1209s. The 808 was similar, if I remember correctly.
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Dec 23, 2008 9:59 pm Post subject: |
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All three tubes ?
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jkruger
Joined: 24 Oct 2007
Posts: 2435
Location: Carlsbad, CA
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| Posted: Tue Dec 23, 2008 10:03 pm Post subject: |
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Mine did that on the blue... smacked it with my cane and the whippersnapper cleaned up his act right proper!
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NewbieDAN
Joined: 09 Mar 2006
Posts: 319
Location: Bunbury Western Australia
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| Posted: Tue Dec 23, 2008 11:27 pm Post subject: |
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| jkruger wrote: | | Mine did that on the blue... smacked it with my cane and the whippersnapper cleaned up his act right proper! |
You have a cane? 
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Tom.W
Joined: 09 Mar 2006
Posts: 6635
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| Posted: Tue Dec 23, 2008 11:38 pm Post subject: |
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A Sencore might be a bit better... 
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jkruger
Joined: 24 Oct 2007
Posts: 2435
Location: Carlsbad, CA
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| Posted: Wed Dec 24, 2008 4:16 am Post subject: |
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Yes, I do have a cane. I do not have a Sencore yet, so I used the cane. Worked quite well with just a gentle tap on the gun area.
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jantje112
Joined: 17 Jul 2006
Posts: 328
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| Posted: Wed Dec 24, 2008 9:49 am Post subject: |
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Isn't it the 17 volt control circuit that needs to be adjusted?
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SisterOfMercy
Joined: 31 Oct 2007
Posts: 155
Location: Zwart Nazareth, The Netherlands
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| Posted: Wed Dec 24, 2008 2:45 pm Post subject: |
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| Tom.W wrote: | | All three tubes ? |
Yes, I think so. I'll have to check.
| jantje112 wrote: | | Isn't it the 17 volt control circuit that needs to be adjusted? |
Recently I've checked my 17 Volt rail, and that was ok. So I doubt the TS needs to adjust the 17 Volt rail. Of course checking it is always ok.
But isn't this just normal behaviour of the set?
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