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Removing a CRT television from its case?
aliveon2legs:
--- Quote from: daywane on December 14, 2008, 06:32:17 pm ---1st. lets try a simple fix.
do you have a large drill? or a blender?
( the bigger the electrick motor the better)
have TV on. (powered up) lets say blender form now on. (any high speed motor will do) (hair dryer is not that good)
start in upper left corner. in a circular motion ( I mean as close to screen as you can get) go clock wise corkscrewing to center of screen,
once you get to the center , pull electrick motor away.( hold motor and take 3 steps back)
this should fix it.
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I just run the motor close to the screen?..I don't have to have anything attached to it?
protokatie:
Degauss button (if present, or as a menu option) is preferable. Also, would suggest using a speaker magnet as it tends to be strong and not AC. Ive had to degauss a screen with one before, but it took like 20 passes....
EDIT: Just read the last reply, if the problem isnt decoloration, then degaussing will not fix anything. (Degaussing just helps realighn the screen (IE the metal screen that helps focus the "colored" electron beams to hit the proper phosphor.)
AndyWarne:
A permanent magnet will tend to act as a gausser rather then a de-gausser! AC is the proper way as this produces an alternating field and the important part is moving the magnet away from the screen when done, before switching off, which produces a slowly reducing alternating field.
All TVs and monitors have an in-built de-gaussing coil which does exactly this at power-on. This is a black snake running around the back of the CRT. Sometimes its not powerful enough or simply not working at all.
The de-gaussing coil is fed from AC mains via a component called a posistor which is a type of thermistor. Unfortunately these do fail especially when the monitor has been exposed to damp as the internal elements corrode.
beastathon:
--- Quote ---All modern TVs discharge the CRT by themselves but putting that aside for a minute... even if it were not discharged, this is like saying a car mechanic must drain the fuel tank before he opens the hood.
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How modern are we talking here? I have a 1983 (I think) Phillip's CRT, and I'm just interested.