Still not fixed.....Did you end up fixing this one? I am having the same issue. I greased the pinch roller axles and made sure the head turns like the other suggested. Fresh new belts installed as well. Still no dice. This is driving me nuts.
That will be the tape sensor.Still not fixed.....
Yeah it's activating auto rev due to no movement of the disc. To confirm put in auto stop mode and should stop straight away.That will be the tape sensor.
There is a sensor and a light with a 4 blade fan that pass through the beam and when the fan stops the tape mech stops.
Make sure the belt on the right tape spindle is moving the fan blades and tape counter.
If it is then you will need to resolder the wires going to the sensor board and check again.
I have repaired alot of this tape mech