[comp.sys.zenith.z100] Z100 keyswitches

GUBBINS@RADC-TOPS20.ARPA (Gern) (01/09/89)

Z-100 Keyboard key swithes are available (for under $3.00, rumor has it)
direct from Heath Parts Department.   I have no info on the part number.
I also saw that Hogware (refer REMark & Sextant magazines) also offers
them for under $2.00.   I am looking to get a scrap keyboard to pull 
switches off of also if any one needs some in the future.

Gern
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LUKEN@IBM1.CC.LEHIGH.EDU ("Kenneth R. van Wyk") (01/10/89)

     Re: Z-100 keyboard switches.  Try Heath Parts; I've gotten
     several keys from them in the past.  Sorry, but I don't have
     a part number to give you...

     Ken

Kenneth R. van Wyk                   Calvin: Mom, I'm going to grow a LONG
User Services Senior Consultant         beard like the guys in ZZ Top!
Lehigh University Computing Center   Mom: That's great Calvin, do it!
Internet: <luken@Spot.CC.Lehigh.EDU> Calvin: Wow, I thought she'd put up more
BITNET:   <LUKEN@LEHIIBM1>              of a fuss than that!

davis@galaxy.ee.rochester.edu (Al Davis) (01/10/89)

I have been successful at "fixing" them.

Unsolder the contacts (there are 2).  Use solderwick, braid with flux, etc.

Squeze the clips that hold it to the metal plate, and lift with a small
screwdriver, rocking it.

Open it: bend slightly the plastic tabs on the side.  It comes apart.  Don't
bend too much; they break.

Inside, there is a coil spring, a bent flatish piece of metal, and a
membrane switch.  The problem is that it gets fatigued.  To fix, bend the
flatish piece so it puts a little more pressure on the membrane, then
reassemble.

With too little pressure, it will either bounce or make no contact.  With
too much pressure, it makes conatct all the time