Gadgety1 wrote: 
> Could you supply a reference for that claim?

Personal experience of JTAG pin jigs at work. They have spring loaded
pins with either sharp points or rounded ends that make contact with
flat PCB pads. All gold plated. They make good contact initially, but if
I leave one assembled on the jig after a few months the debugger stops
working. I have to slacken the mounting pillars and move the connections
about to get a clean contact. If they're really bad I have to clean then
with alcohol.

I note that the Wolfson fitting instructions say you should clean the
PCB holes with alcohol to get a good connection. My first thought was
"and how long before that needs doing again?".


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