Took mine out of the cupboard yesterday. Wouldn`t flippin work, nightmare. Had to take the cover off. There are 2 limit switches. One tells it that the record is clamped. Only when this switch is activated, the disc will spin. Luckily, it is screwed down, so, you can loosen the screw, and, tilt the switch slightly, till it rips. It works ok now, but, there are some bad design faults on it. Can anyone tell me how the f5 clamp works.

No, I do not know this one!