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Help me I.D. and degauss this 29" flatscreen
IntruderAlert:
Anybody recognise this monitor?
It's a 29" flatscreen
There is some discoloring in the bottom left and top right corners
Can this be fixed?
I guess I'll need to degauss but I don't know if it has a built in degauss switch or not
I'd really like a manual or any info you guys can provide
DaveJ-UK:
Are there no markings on the PCB?
I had similar issues with a WG monitor of mine, which turned out to have 2 unshielded speakers in the cab. Try removing the speakers as that would be a very easy fix.
MonitorGuru:
As far as I can see, there is NO degaussing coil wrapped around the tube or attached to the board. Most monitors auto-degauss when they are powered up and unless it's really bad you don't need to do anything.
however this one is lacking it anyway, so you're going to have to degauss it yourself.
The problem may be earth related. Try twisting the cabinet 90 or 180 degrees. Do the colors go away or turn to purple instead?
Or they may be speaker/power supply related. Do you have an unshielded speaker in the upper right of the cabinet and a power supply in the lower left?
Or it could just have had the shadow mask magnetized by being in a cabinet with unshielded speakers before.
In any of these cases, you will probably need to degauss the tube manually. Just build or buy a degaussing coil, or at the very least try a powerful soldering iron to use as a quick degausser and see if that helps.
cholin:
Can you guys explain how this degaussing stuff works? What does it do? How do you do it? Ive heard alot about it, but never understood it.
MonitorGuru:
Use search... 5 pages (* ~40 posts per page) of results on Degauss.
In summary: A degusser produces an alternating current wave in a circle of wire. This current helps remove magnetism that is stuck on metal objects such as screws, monitor frame, and the shadow mask inside the tube itself.
You start with the circle against the monitor then make concentric circles around the monitor while slowly moving away from the monitor. Once you are about 6 feet away from it, it should no longer be bending/discoloring the picture and then and only then do you turn it off. If you turn it off against it, you can remagnetize it and have to do it again.
It's safe to do while the game is on and helps determine where you need to do it more/longer.
All monitors and TV's are supposed to come with a wire around the back outside of the tube that sends about a 3 second jolt of AC power through it when the set it turned on. Otherwise, your TV would eventually become discolored or other problems if you moved it through the house or even just let it set due to the earth's magnetic fields.