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What kind of Marquee 9500LC is this..??
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stridsvognen
Guest
Posted: Sun Apr 20, 2014 12:41 pm    Post subject:
Nashou66 wrote:
A shorted tube would not cause Spotkill circuit to activate. The Spot kill is on the VNB and VIM. There are some measurement points on the vim to see if it being activated.

Athanasios


Its just a guess that it was the spot kill, but when its on there is a lot of noise on the tube face, with no signal, and when turning the projector off the light colapses into a spot in the center of the tube, who then softens and fades out.

Never had any isues after changing the tube, and tested with a different VNB before changing the tube, same result.

So for me that low hour, mint tube is kind of dead.. I kept it in the chamber, and hope it can be restored.
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jbmeyer13



Joined: 03 Dec 2010
Posts: 1135
Posted: Sun Apr 20, 2014 4:22 pm    Post subject:
stridsvognen wrote:
Nashou66 wrote:
A shorted tube would not cause Spotkill circuit to activate. The Spot kill is on the VNB and VIM. There are some measurement points on the vim to see if it being activated.

Athanasios


Its just a guess that it was the spot kill, but when its on there is a lot of noise on the tube face, with no signal, and when turning the projector off the light colapses into a spot in the center of the tube, who then softens and fades out.

Never had any isues after changing the tube, and tested with a different VNB before changing the tube, same result.

So for me that low hour, mint tube is kind of dead.. I kept it in the chamber, and hope it can be restored.


Did it look like this:

http://youtu.be/fz31tMrXW7g
_________________
Projector: Modded 9501LC ULtra- MP VIM, Vold VNB, ETECH LVPS, Silver VIM Cables, HD10F's & a V1 case!
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gjaky



Joined: 05 Jun 2010
Posts: 2802
Location: Budapest, Hungary

Posted: Sun Apr 20, 2014 5:56 pm    Post subject:
stridsvognen wrote:
Nashou66 wrote:
A shorted tube would not cause Spotkill circuit to activate. The Spot kill is on the VNB and VIM. There are some measurement points on the vim to see if it being activated.

Athanasios


Its just a guess that it was the spot kill, but when its on there is a lot of noise on the tube face, with no signal, and when turning the projector off the light colapses into a spot in the center of the tube, who then softens and fades out.

Never had any isues after changing the tube, and tested with a different VNB before changing the tube, same result.

So for me that low hour, mint tube is kind of dead.. I kept it in the chamber, and hope it can be restored.


This sounds like gas poisoning in the tube (ie. there is some air in the tube), unfortunately not much you can do about that. Symptoms are: substantially larger grid currents, disability of emission shutdown, with time it will get worse, this is a sad death for a good tube.
_________________
projectors in the past : NEC 6-9PG xtra, Electrohome Marquee 6-7500, NEC XG 1351 LC ( with super modified Electrohome VNB neckboard !!!)
current: VDC Marquee 9500LC
The MOD: VNB-DB, VIM-DB
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stridsvognen
Guest
Posted: Mon Apr 21, 2014 7:46 am    Post subject:
jbmeyer13 wrote:
stridsvognen wrote:
Nashou66 wrote:
A shorted tube would not cause Spotkill circuit to activate. The Spot kill is on the VNB and VIM. There are some measurement points on the vim to see if it being activated.

Athanasios


Its just a guess that it was the spot kill, but when its on there is a lot of noise on the tube face, with no signal, and when turning the projector off the light colapses into a spot in the center of the tube, who then softens and fades out.

Never had any isues after changing the tube, and tested with a different VNB before changing the tube, same result.

So for me that low hour, mint tube is kind of dead.. I kept it in the chamber, and hope it can be restored.


Did it look like this:

http://youtu.be/fz31tMrXW7g


Yes the spot looked like that, the different is just that my tube wont display a image, just noise. But when turning it off it looks just like the video.
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stridsvognen
Guest
Posted: Wed Apr 30, 2014 3:29 pm    Post subject:
Just won a Sencore Cr 7000 on Ebay, so i hope ill be able to test some tubes.

http://www.ebay.com/itm/171309306120?ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649
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