Hi All.
I am trying to rebuild some old 100mW green lasers.
I am hoping that someone here has seen this type of PCB before.
I controls the X and Y scanner motors.
I am trying to find out what kind of signal there is on the black yellow and white wires. Those are the control signal in.
The d-sub plugs are out for X and Y.
Link for pictures to the pcb

https://we.tl/t-gO1EjY8BHo

Best regards Philip Nedergaard Denmark