This Eddy sensor board is a newly redesigned replacement board for the Twilight Zone's original Eddy sensor board (# A-16535).
Failure of the original board typically results in the machine getting confused as to where the power-ball is. Machines with broken Eddy boards are either not detecting the power-ball or declaring all balls a power-ball.
This new board features a multi-turn adjustment. This allows for a precise adjustment of the eddy sensor. In addition, the multi-turn feature results in the board being less likely to go out of adjustment with the high vibration and shock loads experienced under the playfield.
This board is located on the underside of the subway, under the playfield.
Bally reference #A-16535.
Bally reference #A-16535.