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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Thu Aug 30, 2007 6:38 pm Post subject: |
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Ouch. That's the first time I've ever seen a face failure on a Panasonic P19 tube.
The pressure must have been remarkable. I'm surprised the chamber didn't just
pop before it got to that level. But silicone rubber is strong stuff.
Incidentally, the glycol in the other tubes (blue for certain) is also cloudy and needs
to be replaced.
But given the condition of the red and blue tubes, I'd say it's worth it to spring
for a new green tube.
CJ
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stefuel
Joined: 07 Mar 2006
Posts: 3353
Location: Green Harbor MA USA
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| Posted: Thu Aug 30, 2007 10:54 pm Post subject: |
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Not so rare. Brings back bad memories
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6083 Time(s) |
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_________________
Chip
A Barco is only a AmPro with training wheels
Card carrying member of the AVS chain gang.
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AnalogRocks
Forum Moderator
Joined: 08 Mar 2006
Posts: 26706
Location: Toronto, Ontario, Canada
TV/Projector: Sony 1252Q, AMPRO 4000G
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| Posted: Fri Aug 31, 2007 4:10 am Post subject: |
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Wow cracked in an 'H' shape.
I remember your post about that. That's an expensive 'H'
_________________
Tech support for nothing
CRT.
HD done right!
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Sun Sep 02, 2007 12:20 am Post subject: |
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Hello
We are curious, were the red and blue bellows hard (pressurized) or mushy (OK)?
I have seen two cracked greens in the last three years; I think it was glycol pressure, others think it had to be beam damage or flawed glass, any comments guys?
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jantje112
Joined: 17 Jul 2006
Posts: 328
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| Posted: Tue Sep 04, 2007 9:39 pm Post subject: |
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This baby is in my hands from now on. It has the 03P VIM that's the good one I think (when it's working  )
I stripped it completely and too bad the HVPS had a lot of white corrosion on the electronics, so I'm afraid that..
Well, let's see how it works out.. Time to clean the chassis, order a new tube, get a bunch of MP mods and enjoy the movie 
Anyone know if it will work if I only install 1 tube, for testing use?
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Zebu Fellenz
Joined: 21 Dec 2006
Posts: 2567
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| Posted: Tue Sep 04, 2007 9:52 pm Post subject: |
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I'm pretty sure you need all three scan yokes connected so the projector will power up; why not install all the tubes and just pull the HV on the ones you don't want running.
It already has a usable R AND B right.
Erik
WooHoo 300 Posts 
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jantje112
Joined: 17 Jul 2006
Posts: 328
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| Posted: Tue Sep 04, 2007 10:44 pm Post subject: |
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| Zebu Fellenz wrote: | I'm pretty sure you need all three scan yokes connected so the projector will power up; why not install all the tubes and just pull the HV on the ones you don't want running.
It already has a usable R AND B right.
Erik
WooHoo 300 Posts |
The projector probably decided not to work in the days it's moved from spot to over here. The HVPS has a lot of corrosion, I guess when it whas flipped down in ceiling mount position it leaked some back in the HVPS and that results in a dead Marquee.
The picture was his last breath
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tse
Joined: 03 May 2006
Posts: 1014
Location: Sweatbucket, Fl.
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| Posted: Tue Sep 04, 2007 11:51 pm Post subject: |
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White, powdery stuff in the HVPS is probably release agent used to ease removal of the potted HV section from it's mold.
Scott
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"Were we directed from Washington when to sow and when to reap, we would soon want bread."
Thomas Jefferson
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jantje112
Joined: 17 Jul 2006
Posts: 328
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| Posted: Tue Sep 04, 2007 11:56 pm Post subject: |
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| tse wrote: | White, powdery stuff in the HVPS is probably release agent used to ease removal of the potted HV section from it's mold.
Scott |
Well,
That's sound promising. Strange thing is that the 9500 at my home didn't do anything. Diconnected green, it powers on, blue and red tubes are on (they glow by the neckboard) But, no raster and no sign of anything on the tubes (pressed every button)
Good thing is, I cleaned out the whole chassis (so easy its a dream) and prepared the LVPS for a fanmod, lot's of dust in the LVPS, is that normal?
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Tim in Phoenix
Joined: 21 Oct 2006
Posts: 4409
Location: Phoenix
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| Posted: Wed Sep 05, 2007 12:21 am Post subject: |
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| jantje112 wrote: |
Well,
Strange thing is that the 9500 at my home didn't do anything. Diconnected green, it powers on, blue and red tubes are on (they glow by the neckboard) But, no raster and no sign of anything on the tubes (pressed every button)
Good thing is, I cleaned out the whole chassis (so easy its a dream) and prepared the LVPS for a fanmod, lot's of dust in the LVPS, is that normal? |
Hello
You will need the scan yokes connected or the Marquee goes safe and the high voltage will not fire up.
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jantje112
Joined: 17 Jul 2006
Posts: 328
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| Posted: Wed Sep 05, 2007 6:32 am Post subject: |
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| Tim in Phoenix wrote: | | jantje112 wrote: |
Well,
Strange thing is that the 9500 at my home didn't do anything. Diconnected green, it powers on, blue and red tubes are on (they glow by the neckboard) But, no raster and no sign of anything on the tubes (pressed every button)
Good thing is, I cleaned out the whole chassis (so easy its a dream) and prepared the LVPS for a fanmod, lot's of dust in the LVPS, is that normal? |
Hello
You will need the scan yokes connected or the Marquee goes safe and the high voltage will not fire up. |
That's the info what i was looking for. I keep you all informed.
BTW, the green has no typenumber and a vdc sticker. Is that a rebuild?
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cmjohnson
Joined: 03 Apr 2006
Posts: 5180
Location: Buried under G90s
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| Posted: Sat Sep 08, 2007 9:25 pm Post subject: |
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Probably.
Easy way to tell: What color is the bell glass? It goes yellow, then amber, then brown with a lot of use. (X-rays do it.)
A "typical" tube at the end of its service life will be rather brown. This will almost always include well-worn phosphor.
Seriously browned bell glass and clean phosphor is a combination that screams "I'm a rebuilt tube!".
Plus the dag coating color can be a clue, too. Brown means rebuilt, ALWAYS. But not all rebuilds have brown dag.
Some have the factory grey-silver dag.
CJ
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