On Sun, 13 Feb 2011 14:57:17 +0100 Ralf Mardorf <[email protected]> wrote:
> On Sun, 2011-02-13 at 07:14 -0600, Gene Heskett wrote: > > On Sunday, February 13, 2011 06:19:09 am you wrote: > > > Pardon, I hope you're indulgent, but perhaps another user or video > > > engineer is able to help. Using Ubuntu Studio/64 Studio is unpleasant > > > while the screen has got colour spots. > > > > > > When turning on my monitor or using the degauss option by the menu, > > > nothing happens, but a little click sound, without the additional noise > > > done by the degauss. > > > > > > Because I don't have the professional equipment to degauss CRTs from > > > external, I tested > > > a demagnetiser coil for analog audio heads, with and without > > > touching a long screw driver, > > > a reversing hammer drill, > > > not a hand-held blender, because the cable was too short, > > > but a fan heater and > > > another monitor degaussing while face to face to the motley > > > monitor > > > without success. > > > > > > Until now I didn't screw on the monitor. > > > > > > Any trick how I can degauss it today, without repairing it and without > > > buying a low cost CRT degausser? > > > > > > Any hints about what component/s might be broken? > > > > That monitor will eventually need repair, the varistor circuitry that does > > this has failed. Its a fairly common failure. > > Hi Gene :) > > thank you. You're right, but too late, I already repaired it. > > I called Thomas, he said that usually the black box connected to the > wire, wrapping the tube, will be unsoldered and he was right. I opened > the monitor and this resistor-thingy was single sided unsoldered and > additionally half of the land isn't existing. I soldered the pin to the > half of the land and now it's repaired. Unfortunately opening the > monitor was hard and it is much harder to close it correctly, so for the > moment the monitor isn't closed very well, but the screen is ok. > Degaussing is working again. > > Cheers! > > Ralf > > PS: Any hints how to close a MEDION LIFETEC MD 1998 JB J91B case are > welcom *lol*. > > > > > I don't know what is available where you are, but Radio Shack used to sell > > an audio tape eraser for about 25$ back in the day of audio cassettes. It > > is strong enough that I have even used it to degause the steel racks the > > monitors were mounted in after a heavy lightning storm. > > > > It is slightly shorter than a pound of butter, has a pushbutton switch in > > the top of its T shaped handle, and should not be energized for more than a > > minute at a time else it will overheat, but be aware that it should not be > > turned off until it has been removed, slowly, to a distance of 3 or 4 feet > > in order for the residual fields to decay slowly enough to result in the > > metals in the crt to be truly demagnetized. > > > > A tv service shop that has been around for a long time may have a big coil > > that was used for that back in the day & may be willing to loan it to you > > for an hour or so. Same rules apply there, be several feet away before > > turning it off. > > > > > Cheers! > > > > > > Ralf Unfortunately this won't last, so you will need to plan for a replacement. -- Will J Godfrey http://www.musically.me.uk Say you have a poem and I have a tune. Exchange them and we can both have a poem, a tune, and a song. _______________________________________________ 64studio-users mailing list [email protected] http://lists.64studio.com/mailman/listinfo/64studio-users
