Can a monitor's built in degaussing coil make it worse?

I don't suppose there is any sort of magnetic field nearby - speakers etc? It could also possibly be a tube fault.

in

used

monitor

While something mangetic in the vicinity is the most likely cause as suggested in another posting, note that monitors are adjusted assumgint they will be used in the normal orientation. When tilted as far as you have it, the Earth's magnetic field direction is significantly different than normal.

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Hi,

I'm pretty sure it isn't something magnetic because I had a different monitor in it that didn't have this issue.

What do you guys think about my theory that the built in degauss coil is actually messing it back up slightly? I haven't proven it yet, but the manual degauss coil seems to make it look pretty good and then when I turn the monitor back on the internal coil seems to mess it up a little more. I haven't tried rotating it 180 degrees to see if it works better in that orientation yet, I might give that a shot too. Any other ideas?

Thanks,

Alan

Hi Alan...

If you mentioned the age of the setup I musta missed it... but is it possible that the monitor is old enough that it requires purity setup?

Us really old guys will recall the days when the yoke wasn't cemented to the tube... used to loosen a setscrew, slide the yoke back on the neck of the tube. Find a red blob, center it with centering magnets, "purify" it with yet another magnet, then slide the yoke back as close to the bell as you could without upsetting purity.

All behind the set, while holding a mirror in one hand around the front so you could see what was happening. And hoping not to grab the yoke itself :) And then came convergence...:)

Ahhh, the good old days :)

Ken

I

You probably magnetized it slightly with the external coil and "fixed" the misadjustment, then the internal degaussing coil demagnetized it so it's messed up again.

Hi,

Thanks everyone for the comments and ideas. I ended up rotating it 180 deg and this made it much better. So now instead of the bottom of it to the left I have the bottom of it to the right. I degaussed it with the external coil, then with the monitors internal degauss feature. I can still see a very slight discoloration of the red in the upper left, but nothing like it was before and hardly noticable.

Thanks,

Alan

On Wed, 16 Mar 2005 16:18:01 -0600, "SA Development" put finger to keyboard and composed:

Did you experiment by disconnecting the degaussing coil?

- Franc Zabkar

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Please remove one 's' from my address when replying by email.

Hi Franc,

I never tried that, but it was on my list to try. Oddly enough rotating the monitor 180 degrees so the bottom was to the right instead of the left seemed to clear it up.

Thanks!

SA Dev

When a CRT monitor is orientated to outside of the paramter of calibrateon, such as not lying flat as it should, it is very likely that the earth's magnetic field is effecting the mask of the CRT. If you orientate the monitor to be flat, it is most likely it will be working okay.

Jerry G. ======

deg

external

it

Are you sure it doesn't have a purity adjustment in the menus? Many computer monitors do, particularly larger ones.

Failing that, strategic gluing of a few small refrigerator magnets can cure it.

I can recall those days, I grew up working in my old mans repair shop back in the 50's. The solution to setting the yoke was not to try and use a hand held mirror. Pops had one whole wall of his shop set up with a real big mirror, then all the techs had to do was point the front of the tv to it.

Heck I can remember when work was slow he's bring over boxes of odd parts from just about every brand and tell me to build a working set.(couldn't do that today tho'.)