6 May
2010
6 May
'10
11:09 a.m.
for a DEC GIGI (VK100) I recently acquired. Many of the keycaps on the GIGI
pull off very easily so little surprise it is missing a couple.
With this design of keyboard (used by many manufacturers), sometimes th
hollow square plastic key plungers split (often at a corser). This
remults in the keycaps falling off easily, it also means the keys tend to
stick.
One trick I've used in the past is to move the defective plungers onto
litle-used keys (in my case the numeric keypad).
THe HP85 service manual gives some information on taking these keyboards
apart. You cna reuse the plungers, though. I don't suppose anyoen has the
tool for insering new contacts, do they?
http://picasaweb.google.com.au/lh/photo/Bdb1fRKIjtP6Q0CebliU-g?feat=directl…
(Aside: on powerup it promptly had conniptions and also needs parts for the
PSU - fortunately easy to find at our local electronics store).
What fialed? Isn't this a swticher? If the chopper transistor has failed
(and it did in a couple of VT100s here),, you need to check surrounding
components (particularly low-value resisotrs) too.
-tony