As Mike has mentioned, its the keyswitch for the "S" key that needs to be
(1) See if someone who reads this newsgroup is nice enough to desolder a
good keyswitch from a extra keyboard they might have and mail it for a small
I am guessing this keyboard is an ALPS keyboard, with 2 solder connections
(2) You could desolder the switch and try to disassemble it and see if you
can fix it, I am not sure how much luck you will have on your first try?
(3) You could simply swap the "S" keyswitch with a keyswitch that is rarely
used - possibly from the keypad?
While thinking about this .... I was trying to remember who made keyboards
for the older TRS-80 products. Help me here ..... my memory is failing :)
Original keyboards made bi HITEK, these were the keyboards that KBFIX was
written for. These keyboards had replaceable contacts and a special tool
used to insert the replacement contacts. (after desoldering the old ones and
pulling them out with needle nose pliers!) Oh yes, Shiny keycaps and were
frequently cleaned by customers with contact cleaner spray.
ALPS made the next generation keyboards, discreet keyswitches. Very nice !
Early keyboards made by Cherry, kinda sensitive .... not many of these.
A couple of different revisions of keyboards made by KEYTRONIC. Lots of
little screws and little foam pads.
Same as the late generation Model II keyboards (KEYTRONIC) - different white
and black keys instead of gray and black.
Original keyboard made by ALPS, using the same basic style keyswitches as
the late generation Model I keyboard.
I can think of at least one other style Model III keyboard, I don't remember
if ALPS made the switches - these switches had (4) connections - they were
SPST switches each side of the switch simply had 2 connections, if you saw
the board layout you would see why this was done.
I am pretty sure the later style Model III keyboard keyswitch was used in
the original Model 4. (obviously a few more keys!)
Do I correctly remember a version of the Model 4 keyboard that didn't use
discreet keyswitches? ?? 4D?
Did Fujitisu make these??
Model 12 / 16B:
I can only remember KEYTRONIC keyboards, possibly a few slightly different
Never took one apart, did Fujitsu make these?
Tandy 2000 / 1000 / 1000SX / 1000EX / 1000HX (did I miss some that had a
These were Fujitsu keyboards. I really liked these! They had 12 function
keys when IBM only had 10!
I am pretty sure the "Tandy Enhanced Keyboard" with the Enhanced AT keyboard
layout (101 keys?) was made by Fujitsu also.
Is this getting out of hand??
I can remember at least 4 or 5 versions .... can even remember doing the
6821 to 6822 swap and mods to the original Coco to install the enhanced
Thanks for letting me ramble .... I miss the good old days!!
> If it's one key out, and nothing else in the 'row' or 'column' of the
> matrix, it's the key.