Newly designed stepper motor driver PCB found on many Williams System 11 and WPC pinball games.
Features
Advanced motor control provides for more torque power
Integrated braking keeps motor cool when motor is idle
Auxiliary 12V power port for after market mods
Status LEDs for easy diagnostics
User serviceable with transistors that are replaceable with thru-hole equivalents.
Reference:
D-12046 stepper motor board assembly
D-12045 Motor control board (RIVERBOAT GAMBLER p.66,67)
5768-12270-00 circuit board