bad keys on terminals
ard at p850ug1.demon.co.uk
Wed Sep 13 16:54:30 CDT 2006
> > These sound very similar to the switches used on the TRS-80 Model 3 and
> > Model 4 keyboards. They may even be the same parts -- the ones in the M3
> > and M4 were made by Alps IIRC. Any maker's name on these? If they are the
> > saem, a junk M3 or M4 keyboard would be a source of spares.
> I found out last night that the switches are the same. The question then
That does not really suprise me...
> would become "are the switches on the junked keyboard still good?". See
Maybe, maybe not. My experience is that you'll get _some_ good switches
from such a keyboard. How many do you need (no, I don't have any spares...)?
> > A couple more suggestions. Chemtronics sell (sold?) a rubber keyboard
> > repair kit. It was a 2-pack thing that you mixed and then put a bit on
> > the conductive rubber pad. The problem was that it's expensive, and once
> > mixed you have to use the whole lot (enough for about 100 switches I
> > think).
> You can't mix up small batches? 100 is about how many switches I
The instructions specifically tell you to mix the entire kit, and not to
measure out, say, half of it. Of course they want to sell more kits :-)
> have to fix (two terminals worth)
Well, if you need to do all the switches, it may be worth buying said kit
(if it's still available) and giving it a go.
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