Osborne 1 (was: OT :-) - test-drb@ccmp.vtda.org

29 Oct 2001

Hi again all
Tony asks:
...
 Why suspect the FDC? This soulds like nothing more than
a shorted or
leaky keyswitch. Have yoy taken the keyboard apart to check for this yet. 
When I unplug the keyboard and short out what I think is
Enter (OK, maybe it's something else) the screen still
refreshes, no lights on the floppy drives.
...
 leaky (about 100k between the pins when the key is not
pressed). This
will confuse some keyboard controller circuits. 
At least 3 of the switches seem to be dead shorts. And it's an
assemble-once keyboard, the keys have little plastic pins that
are melted to keep the whole affair together.
Wouter
ZS1KE for anyone interested
www.retro.co.za