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Qunatz
Joined: 08 Nov 2009
Posts: 25
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| Posted: Fri Nov 13, 2009 5:48 pm Post subject: Sony G70 broken TUBE ?????? |
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Hi, i have a problem. I bought a Sony G70 and suddenly there is a damage on the TUBE ?? Its totally black on that point how you can see.
Is it fixable ? Or am i need a new red tube ? 
After shutdown the projector i saw a light moving in that broken? area.
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draganm
Joined: 08 Mar 2006
Posts: 8990
Location: Colorado
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| Posted: Fri Nov 13, 2009 5:52 pm Post subject: |
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I'm sorry to see that, I had a G70 that did exactly that to All 3 tubes and I'm not sure why but I think it was a GB power board failure maybe? Your lucky because a Red tube should be easy to find and cheap. hopefully curt has some better advice
how many hours on machine?
Last edited by draganm on Fri Nov 13, 2009 8:13 pm; edited 1 time in total
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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 13, 2009 6:02 pm Post subject: |
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I would run the set on and off for about 100 hours before changing the tube. That damage almost always happens at turnoff, so make sure you don't get a bright dot in the middle of the screen when turning the set off. If you do, find the cause of the problem before changing tubes. I believe I do have a good red tube here.
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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 13, 2009 6:03 pm Post subject: |
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Oh, a short within the tube can cause that, or a bad PA board, CRT neck board, power supply, etc, etc.
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Qunatz
Joined: 08 Nov 2009
Posts: 25
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| Posted: Sat Nov 14, 2009 5:51 pm Post subject: |
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Ahmmm i forgot to say that before it happened the red tube turned on and off and tayed off while i turned the CRT P. on.
Suddenly after 20 min while i turned the CRT p. on everything was ok until the red tube gone dead. I can remember that if i shuted the CRT P. down i could see a red point poping in the middle of the tube ( in that time where the red tube didnt turned on).
How much do you want for your red tube curt ?
And can i use the G70 without fear ?
Many many thx
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Qunatz
Joined: 08 Nov 2009
Posts: 25
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| Posted: Sat Nov 14, 2009 10:05 pm Post subject: |
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So i can say the cause of my problem is not the tube !! because...hmmm how can i explain it in english 
I mounted the G70 so that the top is on the underside like ceiling mount but on the ground.
After that i got that problem with my red tube.
Now while i turned back the G70 everything is ok but with the damage on the phosphor. Anybody know what problem there was ?? Probably the preassure on the chassis ??
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