I'm having the same motor issue on my TZ clock, which shares the DC Motor control board A-16120 with demo man. I've put the TZ board on it and it's giving me this issue too the claw keeps going on left and goes out of range. I think you have to look on this board, maybe/probably the little 100ufd cap has leaked just like on mine!
Anyway now i'm having issue in putting the claw back "in range".. the game won't move it on it's own neither in game nor in test.. I've always been told not to move manually motorized parts.. is there another safe way? 
Ponte Vedra Beach, FL
