On Tue, 16 Oct 2018 07:54:47 +1300, geoff
wrote:
On 16/10/2018 2:48 AM, Scott Dorsey wrote:
In article , Paul wrote:
https://encrypted-tbn0.gstatic.com/i...NGiz_quRoJu2nQ
See the center ring? That's supposed to be connected
to the center pin. In my case, it's an open, and unlike
this picture, the trace disappears into the plastic moulding.
The ring itself is clean, and has good continuity, but there is an
open EMBEDDED INSIDE THE PLASTIC. I could try to break the plastic
apart, but then the whole thing will be toast!
This is typical construction; there is a rivet used to make the connection
betwen the phenolic board and the pin. What happens is that the rivet
contact corrodes and becomes open. Guess what you can do in order to clean
that up?
Just because the contact is embedded in the plastic doesn't mean it can't be
cleaned up.
--scott
I've had luck (luck that it 'took') simply flowing solder from the rivet
to the metalised track.
Should conside that as short-term relief only, and may or may not work
with some makes of pot.
geoff
Sometimes conductive paint works to repair this issue.