LK201 key stuck

From: Charles H. Dickman <>
Date: Tue Oct 7 18:33:29 2003

I have been working on a DEC Pro 380 and the LK201 keyboard I have
causes the Pro to report a stuck key and hang. So I opened up the
keyboard thinking I could clean out whatever had jammed in there.

Looking at it, I don't quite know how this thing works. Each key is
supported by a "cantilever" spring. This spring has a piece that looks
like it has a contact of some sort, but this is all on top of a layer of
rubber and it doesn't even look like the "contact" touches the rubber.
Below the rubber is a piece of clear, flexible plastic with circuits on it.

So does anybody know how this thing works? Contacts? Capacitive?
Inductive? Has anybody ever fixed one?

Received on Tue Oct 07 2003 - 18:33:29 BST

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