Re: Warped Mouse, CRT

From: Chuck Simmons <numa_at_email.domain.hidden>
Date: Fri, 18 Aug 2000 08:54:23 -0400


I think that the 'warped mouse' syndrome is caused by the wearing of the front support feet. A quick glance at my Lisa showed that I have about 1.5mm of feet at the front of my mouse, which is well-used but still quite serviceable. I am not encountering the rocking problem that you described, so I can only assume that your mouse is a little more used than mine. Fret not, as you can usually pick up Lisa/XL mice for around US$10 on the various auction sites.

As for the CRT problem, it sounds like the raster is off and the yoke needs repositioning (something that can occur as a result of being bumped, like during shipping). If you attempt to adjust the yoke, PLEASE BE CAREFUL! You could die or get seriously injured if the high voltage discharges through you. Of course, you have to adjust it while the unit is energized to find the right spot for the rotation of the yoke. Once you find that prefect spot, tighten the yoke down. You may have to re-adjust the yoke a few times as it can slip out of alignment while tightening down. A fairly easy procedure, but VERY DANGEROUS!! Please be careful.

Hope this helps,

PS - did I mention that you need to be careful? ;)

> Hi all,
> new Lisa owner and new list member all in one here.
> I've just finished giving my Lisa 2/10 (Mac-XL) a major clean-out and
> have a couple of hardware issues to deal with before I start on the
> side of things.
> The first is just plain wierd to me. I haven't used an original Mac mouse
> since about 1988 when a friend had a 128k Mac and this may be normal, but
> I'd be surprised if it were.
> The mouse on my Lisa won't sit flat on the desk. It sits flat on the black
> ball-flange, but the two little feet near the front edge are about 2.5mm
> above the desk. It's sort of a rocking-mouse... when you push the button
> down, the whole mouse tips forward.
> I've examined this mouse very closely and it does not appear to be warped.
> I've disassembled it and given it a thorough clean (I like the real
> ball-bearing in it) and the case is all square and true.
> The little front feet don't appear to be worn down, though this is a
> possibility. They'd have to be about 5 times their current height to touch
> the desk though. At the moment they are maybe 0.5 mm
> I'd appreciate any ideas on this, I'm sure it is not normal as it makes
> mouse a bit difficult to use.
> The second issue is with the CRT. It works well and after some tweaking
> the internal adjustments I can pretty much fill the screen with a nice
> bright image.
> The only problem it has is a distinct narrowing toward the left. The
> problem is primarily that the top edge of the image drops maybe 5mm or
> as it moves to the left-hand side of the screen.
> I'm pretty fussy about that sort of thing and would like to learn how to
> tweak the magnets that are attached to the field windings to straighten
> the picture. I can tell it would take very little to straighten this one
> out.
> Has anyone here had a go at that yet?
> Thanks for any information :)
> Regards
> --
> Robert Ian Axford
> admin_at_email.domain.hidden

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