MPU board test points

TP1: +5 V. TP2: +11.9 V. TP3: +21.5 V taken from the 43 V solenoid supply. TP4: ground. TP5: +5 V. Readings within 10% are normal.

Systems

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

Related tips

• MPU board test point voltages
• Testing an MPU in the game with only J4 connected
• Why the MPU has ROM jumpers
• Telling a -133 MPU from a -35 or -17
• Converting a -133 MPU to a -35
• Setting up an MPU for the test EPROM
• -17, -35 and -133 MPU boards compared
• Telling a -17 MPU from a -35 by connector J5

Source: Voltage Test Points on the Boards