System 9 & 11 1985 to 1990
System 9 & 11 - 1985 to 1990
Williams/Bally System 11B/11C Auxiliary Driver Power Board #D-12247
Product ID: XPIN-0059
Williams/Data East System 3 thru 11B Power Supply #D-8345
Product ID: XPIN-0052
120Hz buzz buster circuit built in to reduce audio hum