Do a switch test, (Config menu, "SW TEST") you should get a smooth sweep
of numbers, about 002 thr 236.
If erratic in spots, then the Pot could have been knocked in.
Pull Front Panel and look at the back of it, there are some tabs that
hold it together and sometimes you can bend them tight and fix.
Look at the board going inside the pot from where the wires are
soldered, could be cracked.
Also look to see that the extension wires coming up from the board to
Pot are soldered good.
If all looks good, try tuner cleaner.
Otherwise replace; E520015
If the test numbers are _always_ good and smooth, then save your config,
EE INIT (parameter initialization) and see if that fixed it.
If it fixed it, then load a known-good saved config file.
If EE INIT did not fix then you can re-load the file you just saved and
look for anything else, like cracked traces or something touching those
lines.
Keith WE6R
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