I'll write it up this evening after "work from home" is done.
I still repair 6800 series Amplifiers from time to time.
Spinning is highly unlikely unless the stops were removed and the sensor flag on the shaft is broken.
Oscillation is likely if the previous owner messed with the tuning or the wiring is messed up.
There are some checks you can do with the system off , and some checks with drive disabled on the amplifier. I'll take a picture later.
L8tr.
Steve
Last edited by mixedgas; 04-24-2020 at 08:40.
Qui habet Christos, habet Vitam!
I should have rented the space under my name for advertising.
When I still could have...