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From: socha@drivax.UUCP (Henri J. Socha (x6251))
Newsgroups: comp.sys.mac
Subject: Re: Keyboard problems
Message-ID: <2264@drivax.UUCP>
Date: Tue, 25-Aug-87 15:18:46 EDT
Article-I.D.: drivax.2264
Posted: Tue Aug 25 15:18:46 1987
Date-Received: Sat, 29-Aug-87 08:48:47 EDT
References: <4191@oberon.USC.EDU>
Reply-To: socha@drivax.UUCP (Henri J. Socha (x6251))
Organization: Digital Research, Monterey, CA
Lines: 46


When I had sticky keys on my Mac 128/512 I knew that the problem was not
dust.  Pressing the   Q,Z, or K keys and they would SSLLOOWWLLYY come back up.
Now, don't ask my why those keys, I can't figure it out either.  They are
SO far apart on the keyboard.  Anyway, I did the following:


  *****	WARNING, All guarantees disappear and I never told you this. *****
(I do not know if this works for the new ADB keyboards but it probably does.)

Check that the problem is a REAL sticky key the following will not solve
other problems like a bad keyboard encoder.  (I don't know how, it's an
exercise left for the reader.)

Purchases keyswitches from your apple local dealer.  Mine cost about
$2.00 each and I bought 5 at the time (in case more keys got bad - they didn't).
And yes, I had NO trouble buying them other than the wait till they arrived.

Remove keycaps from key to be replaced and those around it.

Take keyboard apart and note that copper traces exist ONLY on the back side.

Unsolder the keys in question.  Use a solder sucker(sp?) or wick-wire to remove
all the solder from around the key connector so that it is loose in its hole.
This is very important as the key will be removed from the top and you do not
have an extra pair of hands to be de-soldering at the same time from the bottom.

  (And now, the following from memory.)

On the keyswitch side, examine the key.  It is attached to a metal plate for
support but it snaps in/out.  The trick and I forgot the exact details
is to get it to snap out.  Like removing closed tie-wraps without cutting.
Look at the replacement keyswitch to see where and how the snap/latch is.
As I remember they were on the sides and I needed real tiny needle-nose
plyers.  Be sure not to damage other keys around the one to be replaced.

Once out, insert the replacement, resolder, put housing and keycaps back on
and you are done.

Now, that was easy (it took me an hour or so one evening) but isn't it
easier and cheaper (total time wise) to get your dealer to do it?

And the above is definitely NOT FOR THE FAINT OF HEART.
-- 
UUCP:...!amdahl!drivax!socha                                      WAT Iron'75
"Everything should be made as simple as possible but not simpler."  A. Einstein