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ncc1701d
Joined: 08 Aug 2007
Posts: 187
Location: sweden
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| Posted: Thu May 21, 2009 7:56 pm Post subject: BG1208 fixing blue bleeding? |
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I have one BG1208 and one 1208/2.
I want to use the 1208/2 and sell the other, but i want to fix it first.
On 1208/2 i have horrible blue bleeding when contrast is over 55, the other only bleeds over 85-90.
1208/2 is now using the tubes from the other, and i have also tried using the neckboards but it does not help.
That is: ALL tubes and ALL neckboards perform in the 1208 without bleed.
So what other board are involved that i can try swapping?
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BG1208 and BG1208/2
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Ile
Joined: 09 Mar 2006
Posts: 1491
Location: Jyväskylä, Finland
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| Posted: Thu May 21, 2009 8:20 pm Post subject: |
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Swap driver board R7621175, there contrast is added to signal.
If no help, swap switcher board R7617481.
If you use port3 port, then also it could be problem.
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ncc1701d
Joined: 08 Aug 2007
Posts: 187
Location: sweden
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| Posted: Sat May 23, 2009 2:09 pm Post subject: |
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Tried swapping all three boards, first one by one, then all at once, but it does not help 
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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: Sat May 23, 2009 2:31 pm Post subject: |
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It could be the tubes. IF the set has Sony tubes, I've seen this in higher hour BG808s years ago. On the focus/G2 block, are there 3 red wires, one from each tube going to it, or just the lead from the splitter.
A low filament voltage can do it as well.
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ncc1701d
Joined: 08 Aug 2007
Posts: 187
Location: sweden
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| Posted: Sat May 23, 2009 5:11 pm Post subject: |
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It is 180dvb tubes, identical tubes in both and the tubes worked in the old 1208 before. I have always had this bleeding problem on the new one.
Where do i adjust filament voltage? What's it supposed to be?
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audimushroom
Joined: 25 Jun 2007
Posts: 44
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| Posted: Sun May 24, 2009 10:40 am Post subject: |
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When you transferred the tubes have you kept the magnetics?
Could this be an Astig related problem?
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ncc1701d
Joined: 08 Aug 2007
Posts: 187
Location: sweden
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| Posted: Sun May 24, 2009 11:44 am Post subject: |
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I don't remember, over a year ago i swapped tubes. I think i kept the magnetics. In my bleeding 1208/2 there are astig adjustments in a menu and if i remember correct there were extra wires on the magnetics for astigmatism?
So i don't think i swapped them beacuse of that.. well i don't really remember.
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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: Sun May 24, 2009 2:43 pm Post subject: |
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OK, ignore what I said, not applicable to the DVB tubes. Post a pix of the bleeding.
Cheers!
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