you have to dissemble the unit, it’s not that easy to do. I have a mechanical background and didn’t hesitate taking the unit apart Mostly since it wasn’t working correctly). There are to gears attached to the shaft that raises and lowers the head. You might be able to check it by seeing if there is play in the pick up head. you shouldn’t be able to move it left or right very far. If you can the gear may be slipping.
Have a great Thanksgiving
Todd Hudson
Visioneering Media