Mr. Pinball Tip:

If the solenoids on your Bally pinball machine are weak or sluggish, perform this simple test. Measure the voltage at the solenoid driver/voltage regulator module U2 pin 24 to ground (pin 12)--You are looking for 5VDC. If this voltage is low, measure TP1 to ground. If the voltage is OK at this point solder a jumper from TP3 to TP1. The outboard jumper on J3 pins 13 to 25 is prone to failure.

Steve Sobcinski

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