Bridge rectifier for 1970s Bally and Williams DC coils

1970s Bally and Williams EMs run the pop bumpers on DC through a bridge rectifier (shown as VARO or Bridge on schematics). The bridge can short and blow a fuse, or go open. Replace with a lug-style bridge of at least 25 A 50 V; a 35 A 200 V type 3502 (or 2502) also fits.

Systems

• Electro-mechanical

Related tips

• Solenoid fuse blows when a pop bumper fires (1970s Williams/Bally)
• Convert a Genco selenium rectifier to a silicon bridge
• Solenoid fuse blows at start on 1972+ Williams or 1976+ Bally EM
• Coil voltages used by EM makers
• Genco coils weak: failing selenium rectifier
• High tap: a little more coil power from the transformer

Source: Repairing Electro-Mechanical (EM) Coin Operated Games to 1978, Part One, Clay Harrell (pinrepair.com)