Rectifier board fuse ratings (all Bally 1977-1985)

F1: 10 A fast-blow, feature lamps. F2: 3/4 A slow-blow, display high voltage. F3: 4 A fast-blow, unregulated 5 V supply. F4: solenoids, fast-blow, 5 A with two flippers, 6 A with three, 7 A with four. F5: 20 A fast-blow, general illumination. F6: 3 A slow-blow, incoming 120 V AC.

Systems

• Bally MPU AS-2518-17
• Bally MPU AS-2518-35
• Stern MPU-100
• Stern MPU-200

Related tips

• F4 still blows with the playfield coils out of circuit
• Every flash but the last one
• Rectifier board and playfield fuse ratings
• Rectifier board test points
• Rectifier board J1 (to playfield) pins
• Rectifier board J2 (to cabinet) pins
• 12 V at the rectifier board but not at the MPU
• No +12 V at the MPU: check the rectifier board

Source: Voltage Test Points on the Boards