Posts: 4,027
Threads: 172
Joined: Aug 2005
O.K., this is completely true. But there is a possibility of cleaning the contacts trough the little holes right under each key. Sometimes it´s enough space to CAREFULLY use a small, soft brush or some kind of cleaning device.
Posts: 4,027
Threads: 172
Joined: Aug 2005
My fault... I did not read your post completely, so mine seems just to say exactly the same as yours.
Sorry...
Posts: 1,788
Threads: 36
Joined: Aug 2007
I have fixed way too many Woodstock keys in the past... the best way that I have found is to take three bristles from a small wire brush and chuck them up in a hand held pin vise. Trim the ends of the bristles even. Place a small drop of 91% isopropyl alcohol (or electrical contact cleaner) in the offending key's hole on the back of the keyboard. Insert the wire brush bristles and gently "scritch" around in the hole. Try not to break off a bristle in the hole.
The same technique works for HP41s but the holes are much smaller. Try not to use too much solvent on the '41s because the key click disks are held in place by a sheet of adhesive tape that may come loose. This is why I don't like the technique of spraying contact cleaner directly in the holes.