Projection Monitors

Pepelepew

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What causes the screen burn. I was told its on the individual projectors but I think it is the film sandwiched between the plexis. If so where and how much for a replacement? This ones a Toshiba.
Thanks
 
if you want one ( a crt cannon) to tear apart and see lmk. However i almost guarantee you its the crt itself.... one look down the lens of the projector "cannon" will tell you the sad story.

i still have those other front lenses/plexis.. if you stick that in there and still have the same burn, then its in your crts not the plastic lenses.
 
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The phosphors that create the light and color is what has the burn in from age. Not the lenses. The phosphors in a projection monitor however is located in the "cannons" as cadillacman says =P or the CRT guns. You would have to replace the whole gun or guns that are burned in just as you would with the CRT tubes we used in our arcade monitors.
 
theyre cool, but man over time they just burn bad man.

Im prety sure hes talking about the trilogy monitor in the trilogy i just sold him.

I had hoped to find a same-era toshiba tv to rob the "crt laser blaster gun cannons" (haha) out of but i never did. I was just happy the damn thing worked to be honest.

happ sells a kit to convert to a lcd but its like $1000.
 
damn, I thought it might be easy breezy. Can you use tinted plexi to hide? I was reading about leaving it grey screen to reburn the light ones but I think this ones to far gone for that. Can you use any comparable projection tv for replacement? or do you need to get a converter?
 
As others have stated, the screen burn you see in the projection monitor is just CRT burn. Projection monitors (and television sets) are basically just three separate CRT tubes, one for each color. They're small, about five inches, and mounted behind lenses. There is also a cooling fluid in there too, because these CRT's are run very, very bright and get very hot. They have to be, in order to create enough light to fill a massive projected screen.

They burn even worse than normal direct view CRT's, because the little tubes are run so bright. In fact, home video game consoles used to always come with warnings in the manual, saying that they should not be used on a projection television, and for exactly this reason.

The TV set in my parent's living room is a 42" Sony rear projection. It has the "USA" network logo burned into the tubes from too many Law and Order marathons. Seriously. It's faint, but you can see it when the screen is white, like during a commercial.

Even in normal use, projection tubes burn evenly and get dimmer. If you take apart a junked projection TV, you can see a browned rectangle in all the tubes where the image was, and clean phosphor along the very edges. Back when TV sets were worth fixing, replacement projection tubes were a pretty common requirement, after several years of heavy use. In some sets you have to change the cooling fluid now and again too - it gets yellowed from the heat.

-Ian
 
Yep, tinted plexi does not work with these. I guess the tubes have it. Is there a cheap place for tubes, I seen one place at $60-$100 per tube depending. Not sure if they were for mine or not, or how do you find out about compatability of and old proj tv tube. Yea Mike, it is the Star Wars Trilogy. The snow scene is tough
 
yeah hoth blows.

youre seeing top skater burn..

if youd rather stare at trilogy burn you are still free to come pickup the whole crt rack assembley i have.


keep in mind if you buy bare tubes, youll have to swap yokes, putiry rings, then reconverge each tube, then reconverge the whole rack... total mofo and you dont wanna go through all of that..

after switching th whole rack out youll have to go back in wnd adjust focus, coarse brightness, and then attempt an auto converge with the remote.

im trying to get my hands on a sony 32" or 42" flat panel monitor with the same screw type connections, if i get it i will let ya know... however its plasma, so eventually it will burn too heh.. at least with most plasmas theres an erase birn screen function.


I still cant believe you found the original toshiba monitor remote.... still unf-ing believeble.
 
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