After removing the last srcew you can lift and turn the PCB. The Drive Axis (Pin) with its housing is held to the PCB by megnetic force. You can lift it up.

Here i found my problem; One of the 6 coils was loose and the cable was broken from the soldering. I checked the coil with a multimeter (continuity check - beep). The coil was despite some scratches still good and with the signs on the pcb i was able to solder the coil-cable back in place.

For the attachment of the coil to the pcb i choose a strong but still a little flexible glue ("UHU Kraft Alleskleber").