On Tuesday, October 10, 2017 at 6:34:38 AM UTC-6, wrote:
Have good DDC voltage. When the mechanism is plugged into the junction box, the relay in the box chatters and the mech also makes noise, but doesn't move a bit. It is like it is stuck. Help! Many thanks,
Dave

I guess I should have mentioned that the mechanism is stuck in the record-play position.
Dave