Nakamichi Dragon tape deck question
 

Hi everyone, I recieved a Nakamichi "Dragon" high-performance tape
deck into my repairshop and the problem is as follows:
The unit refuses to wind tapes in one direction. Winding the other
direction and play tapes is fine. The tape starts to spin for a second
or two, then stops, just like it sense the tape has reached the end.
Any information would be appreciated,
Regards, Stefan