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geekhack Community => Keyboards => Topic started by: phughes on Mon, 11 March 2019, 08:45:41

Title: Odd problem with IBM Model F
Post by: phughes on Mon, 11 March 2019, 08:45:41

Hi all,

I hope someone may be able to point me in the right direction with a strange issue I'm experiencing while refurbishing my IBM Model F.

I have stripped it down completely, cleaned everything, fitted new foam and re-assembled.  I am using a Teensy board running Soarer's Converter and it all works apart from the following annoying problem:

All keys work except "c" and "m".

If I gently slacken the grounding screw on the PCB (location indicated in photo), the "c" and "m" keys work - but none of the other keys! I can't get the screw at the "sweet spot" where all keys work   :mad:

I took the damn thing apart several times thinking that this was a problem with the contacts underneath!

I know that Model F is quite sensitive, but this problem is driving me crazy.

Any ideas much appreciated!

Regards,
Paul