ppham@gmuvax2.gmu.edu (ppham) (02/13/91)
My 17inch NeXT monitor is crooked at the edges, I took it in for adjustment but instead of the corners shearing upwards, they are now shearing downwards although my cable is slightly bent in the back, straighting it out doesn't help. There is no source of magnitism around or near my computer other then my modem and phone. Prob. #2. The speaker in the monitor tends to "spark" or pop when starting or finishing playing sounds/drones(Looching) Occasionaly, (more on some sounds then others). Someone has told me this is natual, and that it is because the analog signal to the speaker either starts or finishes too abrubtly. Also the Tek rep, told me the speaker has a tendency to buzz or distort at high volume levels because the wattage/volt? level is not matched from output of computer to speaker in monitor. Anyone know Anything more about this ? How can I adjust the monitor myself ? Does that void warranty ? (prob.) Sorry if this is in NeXTAnswers. I have only 105. The Tek Rep mentioned that there is a "service manual" for these machines that NeXT distributes. How can I get my hands on one ?
finger@evax.arl.utexas.edu (Jay Finger) (02/13/91)
In article <3448@gmuvax2.gmu.edu> ppham@gmuvax2.UUCP ( ) writes: >My 17inch NeXT monitor is crooked at the edges, I took it in for adjustment >but instead of the corners shearing upwards, they are now shearing downwards >although my cable is slightly bent in the back, straighting it out doesn't >help. Did you know that putting a 180 degree twist in the cable will invert the video and make your sound files play backwards :-) >There is no source of magnitism around or near my computer other then >my modem and phone. There is too a source of magnetism: you've got a planet with a fairly decent sized magnetic field sitting underneath it. This ain't a joke. You'll get different distortions depending on where the monitor is sitting and what direction it's pointing. Try rotating the monitor 180 degrees. That's good enough to make a visible difference in most locations. The people who adjusted it may have done a perfect job, but unless they did it in your office/betroom/whatever, it doesn't matter much. >Anyone know Anything more about this ? How can I adjust the monitor myself ? Sure, you can adjust the monitor yourself. But it involves moving around several little magnets which are mounted on the yoke (it least it does on most CRTs, I haven't seen the inside of a MegaPixel yet). This is kind of a black art: each magnet affects all the others, so moving one affects the one you moved you before, so it gets moved again, etc. Monitors also have extremely high voltages inside them, which need to be discharged before you start mucking around. This is all real easy if you know how, and not too bad if you've seen someone else do it and know something about why it all gets done. But if you don't now how to do all this, then have someone else do it for you. It has a much better chance of working that way, and both you and the monitor will be much safer. I could explain how to do it here, but them someone will manage to zap themselves anyhow, and I'll be on the receiving end of a lawsuit. So I'll just shut up now. -- Jay Finger #include <stddisclaimer.h> finger@evax.uta.edu finger@csun5.uta.edu b645zai@utarlg.uta.edu
news@media-lab.MEDIA.MIT.EDU (Remote news user) (02/13/91)
In article <1991Feb13.080815.19892@evax.arl.utexas.edu> finger@evax.arl.utexas.edu (Jay Finger) writes: > >Anyone know Anything more about this ? How can I adjust the monitor myself ? > > Sure, you can adjust the monitor yourself. DON'T DO IT!!! I have blasted myself enough times that I can tell you it is NOT a good thing to play inside the monitor unless you have the proper equipment. Look it is not a matter of warrantees, but a matter of LIFE and DEATH. If you bought your monitor within the last year it should still be under warrantee. So if the monitor is maladjusted go to your local service center and ask them to adjust it for you. If they wont do it, call NeXT and grumble about the bucks you are about to pay for a professional to do it, and the get a professional to do it (no, not your brother in law who went to some high school tech class, a real pro... yeah hard to find). Again messing inside the monitor can void your life... Pascal Chesnais, Research Specialist, Electronic Publishing Group Media Laboratory, E15-351, 20 Ames Street, Cambridge, Ma, 02139 (617) 253-0311 email: lacsap@plethora.media.mit.edu (NeXT)
scott@erick.gac.edu (Scott Hess) (02/14/91)
In article <1991Feb13.080815.19892@evax.arl.utexas.edu> finger@evax.arl.utexas.edu (Jay Finger) writes:
There is too a source of magnetism: you've got a planet with a fairly
decent sized magnetic field sitting underneath it. This ain't a joke.
You'll get different distortions depending on where the monitor is
sitting and what direction it's pointing. Try rotating the monitor 180
degrees. That's good enough to make a visible difference in most
locations. The people who adjusted it may have done a perfect job, but
unless they did it in your office/betroom/whatever, it doesn't matter
much.
Presumably, you could remember the orientation wherever you're planning
to put the monitor, and make sure it's in the same orientation at the
"shop". After all, you're presumably taking it into someplace within
an hour or two of your place of work or home - hopefully the earth's
magnetic field isn't going to change _that_ much. Of course, various
fields in the "shop" (which might be a computer lab or something) are
also going to skew what you get when you take it home.
Later,
--
scott hess scott@gac.edu
Independent NeXT Developer GAC Undergrad
<I still speak for nobody>
"Tried anarchy, once. Found it had too many constraints . . ."
"Buy `Sweat 'n wit '2 Live Crew'`, a new weight loss program by
Richard Simmons . . ."jacob@gore.com (Jacob Gore) (02/14/91)
/ comp.sys.next / news@media-lab.MEDIA.MIT.EDU (Remote news user) / Feb 13'91 / > > Sure, you can adjust the monitor yourself. > DON'T DO IT!!! > > I have blasted myself enough times that I can tell you it is NOT > a good thing to play inside the monitor unless you have the > proper equipment. Look it is not a matter of warrantees, but > a matter of LIFE and DEATH. You'd have to work very hard or do something very stupid to zap yourself with this monitor. The external black plastic cover just covers an inner metal cover (shielding?). In the back of the metal cover, there are labeled holes for adjustments. To make adjustments, you use a PLASTIC television adjustment tool, available at any Radio Shack. Just don't stick anything conductive into those holes, and you'll be safe enough. Needless to say, I do agree that if your monitor is still under warranty, you should make a "professional" do it. Not because the "professional" can do it better than you (though that may well be the case), but because that's what you paid for. Also, there are many variables to adjust, and their interaction is not very clear. If, however, you do something stupid, like stick a metal screwdriver into the adjustment holes or pour Dr. Pepper into the monitor, don't do it unless under supervision of a physician. Jacob -- Jacob Gore Jacob@Gore.Com boulder!gore!jacob
finger@evax.arl.utexas.edu (Jay Finger) (02/14/91)
In article <SCOTT.91Feb13155857@erick.gac.edu> scott@erick.gac.edu (Scott Hess) writes: >Presumably, you could remember the orientation wherever you're planning >to put the monitor, and make sure it's in the same orientation at the >"shop". After all, you're presumably taking it into someplace within >an hour or two of your place of work or home - hopefully the earth's >magnetic field isn't going to change _that_ much. Of course, various >fields in the "shop" (which might be a computer lab or something) are >also going to skew what you get when you take it home. Simply making the monitor face the same direction has not resulted in identical behavior from my monitor, but that's a good idea. But you'll probably have a hard time finding a technician who's willing to put up with your idiosyncrasies. He'll just tell you he kept it facing North, when it actually faced South the whole time. Maybe there's a geologist (or some such) in the crowd, who can tell me why just moving 20 miles or so can make such a difference in the monitor's behavior. Assuming, of course, that it really is the earth's magnetic field. -- Jay Finger #include <stddisclaimer.h> finger@evax.uta.edu
cnh5730@calvin.tamu.edu (Chuck Herrick) (02/15/91)
In article <1991Feb14.070958.12057@evax.arl.utexas.edu> finger@evax.arl.utexas.edu (Jay Finger) writes:
Maybe there's a geologist (or some such) in the crowd, who can tell me
why just moving 20 miles or so can make such a difference in the
monitor's behavior. Assuming, of course, that it really is the earth's
magnetic field.
Well, I'm not a geologist, but would a geophysicist do? I'd bet it
might have something to do with throwing the monitor in the back of
the pickup for the 20 mile move. You might want to put it back in the
box in the future.
(;-)
--
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