Thanks for the repair link. Brought back a lot of memories of working
on old black and white sets of the 60's. I even have a fiberglass shaft
screwdriver to minimize chance of electrocution. I remember using it
once to adjust the water tank pressure regulation switch on my house's
water well. Everthing (including the floor) was dripping wet due to the
high humidity and very cold well water. Guess the screwdriver shaft and
handle got wet too. It didn't keep me from getting zapped by mains
voltage when the pump turned on as I was adjusting the screw. Knocked
me backwards a couple of feet into the side of the oil tank. I'm more
cautious today. I'll probably not remove the CRT cover. :-)
I got briefly excited when the repair link mentioned the possibility of
having speaker coils adversely effect the CRT guns. I have my speakers
sitting tightly up against the sides of the monitor near the CRT neck.
Unfortuantely, moving the speakers changed nothing.
The monitor has 5 different controls for geometry and vertical linearity
is one of them. Unfortunately, horizontal linearity is not. I don't
think there are any pot adjusting holes in the back but I'll check that
more closely when I remove the A-B switch from the signal path. Right
now the computer desk is a total disaster area and moving the monitor is
not possible without displacing a lot of other junk that would require
finding it another home.
It's probably not worth paying anyone to work on this thing. If it's
not easy it will have to wait for replacement.
Chuck Norcutt
Jonas Otter wrote:
> Chuck,
>
> Your monitor's horizontal sweep is non-linear, i.e. the current waveform
> which causes the electron beam to travel horizontally across the screen
> does not rise steadily for each line of the picture, but rises faster in
> the middle than at the beginning and end. This is a problem with the
> monitor, not the display adapter. It may be adjustable (see e.g.
> http://www.pcsupportadvisor.com/Troubleshooting_monitor_problems_page2.htm
> ) but unless you can find the horizontal linearity control from the
> outside (not likely) it is not something you should attempt doing
> yourself. Opening your monitor would expose you to a high risk of
> getting zapped with 25000 volts and/or mains voltage. If you think it is
> worth the money, get a TV repairperson or a PC repairperson to look at
> it. Or get an LCD monitor.
>
> Jonas
>
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