Alan, the reason I bring this up is one thought that came to mind.
A remote pot, and switch in another location?
Or is all this at just one location?
Could it be possible that another speed adjustment pot is somewhere else, and that pot is turned up, or shorted, and that is driving the turntable fast. And no-one remmembered to tell anyone there is another set of controls.
I have been on a few calls where the guy says,"it was working fine and then all of a sudden", but he fails to tell you he did something before hand.
Just curious...
Dnk......
