Rollei 6x6 projector focus

Hi,

Rollei P66S projector auto focus is not working correctly. When a slide
is inserted the auto focus motor drives beyond the sharp focus and
continues until the lens is out pushed out of the focus unit. Even if
the slide is focused manually as soon as the focus control is released
the auto focus motor moves the lens until it is completely pushed out.

Does anybody know what adjustment needs to be made on the auto focus
mechanism?

Thanks for any help................

John