26 Jan
2008
26 Jan
'08
9:25 a.m.
Tony Duell wrote:
I don't own a multimeter (don't kill me!) so I couldn't "officially"
check for broken traces. But I did separate it from the backing plate
and it looked simply perfect, like it wasn't more than a day old; if
there was a broken trace, it eluded me.
I've given up and relegated it to the spare parts bin with a note that
ENTER and KEYPAD MINUS don't work. I was manually bridging pads on the
board and those two keys were the only ones that didn't produce any
signal at all. I can only conclude that I must have banged it or
something taking it apart.
However, there is a silver lining: I used the experience of
disassembling and reassembling it a bazillion times to correctly repair
the spacebar on my OTHER XT keyboard, so I am back in business. So
again, thank you very much for the guidance!
--
Jim Leonard (trixter at oldskool.org) http://www.oldskool.org/
Help our electronic games project: http://www.mobygames.com/
Or check out some trippy MindCandy at http://www.mindcandydvd.com/
A child borne of the home computer wars: http://trixter.wordpress.com/
I guess :-( I
took one of the buckling spring mechanisms and "manually"
struck keys with it, and also ran it lightly across the board. Most of
the keys worked except the ones I am having trouble with.
Have you removed the PCB from the baseplate to look for possible damage
to the PSB or to the mylar insulator under it?. Is it possible there are
broken traces on the PCB?