Harman Kardon TD-4800 capstan motor is dead. Can you tell if it's a CCW or CW motor from the service manual? https://mega.nz/#!j5MWHSIT!09rDTVcZlAgd7heUwOMANon8ONIecksq3_CkRntZYng
Could you work it out by turning the broken motor by hand and making sure that the capstan (and reels if driven by it) turn in the right direction ?