Commodore 64-sx Keyboard getting stuck?
bv at norbionics.com
Tue Jul 12 11:53:46 CDT 2005
On 11 Jul, 2005, at 21:18, Ethan Dicks wrote:
> On 7/11/05, Dwight K. Elvey <dwight.elvey at amd.com> wrote:
>> If that didn't work, a last resort might
>> be to use some small wire wrap wire and melt a channel
>> into the plastic layer to keep from deforming the stack
>> too much
> I've seen the results of attempts at that. Let me put it this way -
> try it right before you are ready to pitch the whole mess.
> there's not enough pressure to make contact between oxidized traces
> printed on mylar and any kind of wire. The mylar sheeting is thin
> enough that you are more likely to perforate the mylar than "melt a
> channel" _Perhaps_ some kind of foil overlay might work, but it would
> have to be akin to gold leaf, and you'd need a solder alloy that
> melted below the temp of the plastic to get any sort of joint. For
> that matter, if you had an uber-low-temp solder (200F? 300F?), you
> might be able to overlay entire traces with WW wire, but not if the
> plastic develops holes.
There is a kind of silver paste used for thick-film circuits which
might be usable for this type of repair.
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