Mr. Pinball tip for Tuesday, April 28, 2015

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

Tip Archive

New tips are welcome and encouraged. Tips will be credited to those who contribute. If you would like to submit a tip click here.

For more information you may contact us by email, or by email form.
Go to: Home page, Photo Gallery, Classified Ads, Repair Tip of the Day, The Pinball Collector Register, Advertisers List, Site Map
© Copyright Mr. Pinball 2015. All Rights Reserved.