Rectifier board test points

TP1: feature lamp supply, +5.4 V DC on the AS2518-18 board or +6.5 V DC on the AS2518-49. TP2: +230 V DC for the score displays. TP3: +11.9 V DC (feeds the 5 V regulator). TP4: 7.3 V AC general illumination. TP5: +43 V DC solenoid supply. GND: ground. Readings within 10% are normal.

TP2 carries about 230 V DC; clip the meter lead on with power off and keep hands clear.

Systems

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

Related tips

• Rectifier board test point voltages
• No +12 V at the MPU: check the rectifier board
• No 12 V at rectifier TP3 even with a good F3
• Rectifier test point ranges with fuse and rectifier
• Route of the +12 V supply to the MPU and 5 V regulator
• Rectifier board J1 (to playfield) pins
• Rectifier board J2 (to cabinet) pins
• Rectifier board J3 (to backbox boards) pins

Source: Voltage Test Points on the Boards