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Discussion Starter · #1 ·
I fought a Sony 12xx projector I may be interested in. The unit appears to be in good condition, but I'm not one to judge tubes. If anyone here could tell me how these tubes look let me know.

www.angelfire.com/ar2/buyitcheap/1270Q_Tubes.jpg


I'm not even sure if you can tell, but if you can please help me. I'm not really sure what they're supposed to look like.


Thanks, Corey
 

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Discussion Starter · #2 ·
For some strange reason it appears that the link only works if you copy and paste the address to your address bar and then hit enter. Weird.
 

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Corey,


Afraid it's too hard to tell from the photo because it doesn't show enough of the tube faces. Is the projector something you can examine in person? If you can then the best way to judge the condition of the tube phosphors is to remove the lenses and look for a block of brownish discoloration on the face of the tube. Or what looks like a part of an image that is burned in to the tube face.

If it's not possible to remove the lenses then you can take a flashlight and

shine it through the lens to illuminate the tube face while you're looking through the lens. This is not as effective as looking at the tube faces with the lenses removed but is better than buying a projector when the condition of the tube faces is unknown.


Bob
 

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Like Bob mentioned, pop off the lenses (if you can) and take a look at the tubes faces.


If they look like this:

http://home.centurytel.net/rshannon/blue001s.jpg


Then your tubes are in minty perfect condition!


If the tubes look like this:

http://home.centurytel.net/rshannon/green003s.jpg


Then you have some wear but you may still be ok. You'll most likely have to make sure to set it up such that the image you're projecting fits in the worn area (if you use the outside area, it'll be brighter on screen).


If the tubes look like this:

http://home.centurytel.net/rshannon/blue008s.jpg


Then run away screaming!


Note: The blue tube will usually wear first, followed by the green, then the red.


Check out this link for more photos of CRT tube burn:

http://home.centurytel.net/rshannon/crtburn.htm


Kal
 
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