Frantone is correct in that the slider is used to rotate the whole circular plate. However, it only goes about 20 degrees or so before the plate is lifted out. If the whole plate was rotated 180 degrees the green blade opening knob would be on the wrong side and not work.
If it all works, that is when the cassette is pushed in to position and the blade opens from the toilet compartment, then it must all be OK.
I can't get my cassette door open enough (next to a fence) to check at the moment.
Blade.png - Bild entfernt (keine Rechte)cassette.png - Bild entfernt (keine Rechte)