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Bally CORVETTE pinball machine 2 piece racetrack opto board set upgrade kit.
The set includes a new racetrack opto encoder board (A-18222) and a new track limit opto board (A-18221).
This new design board set has a number of significant advances:
New buffered optos are no longer directly connected to the switch matrix.
Lower current consumption and less heat, for longer life.
Reference:
A-18821 assembly
A-19606 assembly
5768-14142-02 board
Track Encoder Board
A-18822
5160-10269-00 (2) transistor 2N3904 npn
5490-14327-00 (2) ic opto integrated with Schmidt trigger
5791-13830-06 (1) 6h str sq pin .100 solid tab
