Trough opto trans. board 4-ball Williams
Late model 4-ball 5-7 opto transmitter board for many Bally/Williams pinball machines.
Companion to the A-18618-1 receiver board.
- A-18617-1 transmitter board
- A-18618-1 receiver board
- Replaces A-18617
Note: Part numbers for Bally and Williams pinball machines manufactured after 1988 are the same. This replacement board will repair 4 and 6 ball troughs.