Williams/Bally WPC System opto InfraRed transmitter board used in LED assembly A-16908. The corresponding receiver board is A-14231.
Reference:
- A-14231 transmitter board
- A-16908 transmitter assembly with plastic holder
- A-14232 receiver
- A-16909 receiver assembly with plastic holder
- 5671-12732-00 IR LED
- 5768-13155-02 pcb