My K8097 card shows strange behaviour: It works perfectly well for motor 1 if only one of the L6219 chips is in the socket. As soon as another one is put into any other socket, no motor works. Also, if there is only one L6219 chip present in any other socket than the one for motor 1 the motor does not work. We have checked all the soldering spots and have verified that the correct pieces are at the correct places. Also, in the interface the IN-2 switch seems to be permanently on, although it is not connected (verified by measurement). Could you please give an idea where I should start checking to identify the problem.
Could you post some high resolution and sharp pictures of your PCB (top and bottom)?