Bally board designators A1-A8

A1: score display driver boards. A2: power supply/rectifier board. A3: solenoid driver/voltage regulator board. A4: MPU. A5: lamp driver. A8: sound board. Stern power supplies match Bally's AS2518-18.

Systems

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

Related tips

• Bally assembly designators A1-A8

Source: Voltage Test Points on the Boards