Caple C871i Bedienungsanleitung PDF herunterladen (Seite 248)

100

101

Apple II Computer Info

keycaps by suspending them, but, as they say, YMMV.

Using a low-wattage soldering iron and a desoldering bulb, carefully

remove all the solder from the two connections under the bad key. When

you have done so, the pins sticking through the holes should be completely

free of the board tracings. Be careful; if you use too much heat, you can

lift the copper trace off the board. You do NOT want to do that!

Turn the keyboard up-side-up. There is a squeeze-tab on either side of

the keyswitch. With the solder completely removed from the bottom, you

should be able to squeeze these tabs together and lift the switch straight

out. Sorry, no tips here...I have trouble doing it myself. Two tiny

flat-head screwdrivers usually work; sometimes I can get a pair of

needle-nose pliers to do the trick.

To install the new switch, make sure it is oriented the same way as the

old one, and snap it into the hole. If you did it right (and it's REALLY

hard to screw this part up!), the contacts should be sticking through the

holes in the bottom of the circuit board. Heat up the pins and apply

solder to connect the new switch to the board. Reconnect the keyboard to

the computer, power it all up, and make sure the new key works.

Reinstall the key caps, and reattach the keyboard. On the beige ][e's,

line up the edge of the keyboard with the mark you made earlier. Put the

case back together, and it's all good as new.

Usual cost:

$10 (keyswitch)

about an inch of solder

about fifteen minutes-half an hour.

--Dave Althoff, Jr.

(sometimes I think I should buy keyswitches by the dozen 8-( )

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Apple II Computer Technical Information : Apple II Family Hardware Info

ftp://ground.ecn.uiowa.edu/2/apple2/miscinfo/hardware : May 2001 : 248 of 572

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Caple C871i Bedienungsanleitung Seite 248

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