Re: Apple ][+ keyboard

[mike@willegal.net]

Most likely you have dirty keys, but also make sure you have a good
ground between the keyboard and the motherboard.  Try a shorter
ribbon cable, if you have one, or add an extra ground wire between
the keyboard and the motherboard ground planes.  For more information
check out my page on Apple II keyboard page.

http://www.willegal.net/appleii/appleii-keyboard.htm

Regards,
Mike Willegal

On Sep 30, 3:49 am, Nels Bruckner <ne...@comcast.net> wrote:
> I picked up a really nice looking ][+ last weekend from a local
> computer recycler.  Inside I found very minimal dust and everything
> looks to be in good shape; however, the keyboard seems to have a
> couple functional issues.  I was wondering if these might ring a bell
> for anyone -
>
> First issue is there are 4 or 5 keys that don't register at all.
> These are spread around the board and include the repeat key.  Second
> issue is that about 50% of the keys that do function are very 'bouncy'
> - press the key once and you get 3-4 characters on the command line.
>
> I disassembled and inspected everything, and the keyboard appears
> visually to be in great shape.  All the copper contacts on the blue
> fiberglass board are corrosion free (though I cleaned them with
> isopropal just to be sure), all the metal pads beneath the keys are
> shiney and new looking, and all the keys function mechanically just
> like new.  Cleaned the pins on the encoder board, though it also
> appears to be in like-new shape.  I did not remove and reseat the big
> socketed chip on the encoder board, because that sucker is IN THERE
> really tight and I was afraid to pry on it too hard.
>
> The keyboard behaved identically when plugged into one of my spare ][+
> boards.
>
> I've got a Super Encoder on order from Briel, just in case it's an
> encoder issue.  Unfortunately I don't have another ][ keyboard to try
> swapping.
>
> --Nels