when a crt fades

S

Sathsayin

Gawd
Joined
Aug 23, 2008
Messages
634
Just wanted to know that when a crt fades is it the phospur dying are the gun? just wanted to know and if how expensive was the phosphur for like an fw900 if its the phospur thats killing a good 2500 dollar crt. I would be pissed to know that phosphur is like 20 bucks are something but can't be touched inside of a tube. anybody know? are is it the gun that dies. I understand it could be both. but what is it mainly that contributes to the demise of good monitors that just won't die?
 
CRTs fade out because the phosphor wears out. When that happens, the monitor is done. No way to fix it.

Please don't go messing around inside the monitor trying to fix it yourself anyway. The interior of a CRT can hold a lethal charge for a very long time. By lethal, yes, I mean 35,000 volts will KILL you.
 
I think it's 25kV, and it can harm you if contacting with it but there is little difference, 25kV are used for accelaration of electron streams so CRT monitor can have very fast reactions (less than 1ms) so it's not the same as hitting by 25kV from trolley wire. High voltage but low current, so probably it can harm or kill but it is not that strong so it will not frie you. As for all, fading image of CRT is meaning it's old, fluorescent screen that is on the back side of the picture tube is losing it's capabilities and there is no way how to replace or renew it, even tube is insulated from air and trying to open it could result in implosion which is also dangerous.
 
You sure can die from touching a live TV tube.
I've touched a few and its not at all pleasant.
It would take a simple accident to cause serious harm so its best not to trivialize it.

If you have a local TV repair store, they may be able to tweak the gain to the guns.
This will get more life from it and shouldnt be too expensive.
Its not easy to do on some monitors but early ones are more likely to have simple adjusters.
Once done, you might be wise to turn the brightness down when browsing the web etc to preserve its life.
 
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