Opto board assembly used in single drop target assemblies A-20657, A-23407, PBL-100-0042-00, PBL-100-0043-00, PBL-100-0164-00 & PBL-100-0165-00.
These boards are also great for use in homebrew machines!
Game Compatibility List:
Attack from Mars
Fish Tales
Indiana Jones WMS
Twilight Zone
Johnny Mnemonic
No Fear
Revenge from Mars
Star Trek the Next Generation
Terminator 2
Star Wars Episode I
Williams/Bally reference #A-15211, A-15211-1, A-23293, A-17153, A-14615, A-14615-1, A-20657, A-23407.