Main > Monitor/Video Forum
Rotate a TV??
Cfish:
Yeah, the degauss coil over-heat protection is usually built into the circuit in most monitors - it's a thermistor of sorts that will not function while hot - and hitting it will cause it to heat up quickly. That's why after you degauss your monitor for the first time, and you hear that pang, it won't pang again for a little while - like 20 minutes or so - until the thermistor cools down. You can bypass this circuit, but you don't really want to unless you know what you're doing. I've seen where some people bypass this with a manual switch that they can hit it everytime they turn their monitor to prevent the discoloration / distortion that rotation will bring about.
Carsten Carlos:
--- Quote ---it's a thermistor of sorts that will not function while hot
--- End quote ---
Yep, there is a PTC sitting in line with the coil and most likely connected to 110/220V.
I don't remember it exactly, but on most older TV's this circuit was always closed as soon as you switched the TV on - the PTC was kept hot due to the closed circuit, so it took about 10-20 minutes before it could fire again.
My thought is to trigger a coil with a PTC in between -don't know if this would be protection enough, but it should be the same as if you would turn your TV off and on in a short distance.
If the PTC isn't held hot all the time, degaussing should be possible after 10 minutes normal operation - no need to power the monitor down! I can't test this though for it'll take some times to get the monitor I want plus I don't know if I can hack something without voiding the warranty. Depends on if the degaussion-coil is easy pluggable and I can plug it on a circuit of my own.