Do you see actual signs of wear? Sometimes corrosion on the surface prevents a good contact. Before applying anything to the contacts, try cleaning them with a non-abrasive pencil eraser. If that does not work, try lightly polishing them with 1500 grit sandpaper. On Tue, 8 Sep 2015, Terry Raymond wrote: > I think my two keyboards the contacts on the KB PCB are worn I heard years > ago there is a compound that can be applied to the contact to build it up > to repair it. > Terry Raymond > > On Monday, September 7, 2015, Gerrit Heitsch <gerrit@laosinh.s.bawue.de> > wrote: > >> On 09/07/2015 06:29 PM, William Levak wrote: >> >>> On Mon, 7 Sep 2015, Giacomo wrote: >>> >>> Or take some time to clean it: >>>> http://www.oldcomputr.com/cleaning-the-keyboard-of-a-vic-20/ >>>> You have to desolder the shift lock contacts under the keyboard, then >>>> it's >>>> just a matter of unscrewing a couple of dozen of small screws. Remove all >>>> the dirt then gently clean the contacts with isopropyl alcohol. >>>> >>> >>> >>> 91 per cent isopropyl is preferable, since it takes the water with it >>> when it evaporates. >>> >> >> Be careful if you find you have one of those keyboards that have the black >> coating on the contacts on the PCB. It's a bad idea to remove that coating. >> >> Gerrit >> >> >> >> Message was sent through the cbm-hackers mailing list >> > > > -- > Sent from Gmail Mobile > wlevak@sdf.lonestar.org SDF Public Access UNIX System - http://sdf.lonestar.org Message was sent through the cbm-hackers mailing listReceived on 2015-09-09 09:00:07
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