Game repair
Williams System 11 RAM Error Fixed
Before throwing parts at a board that won’t work, here’s a few things you can to save yourself a bunch of time and headaches.
Schematic
Game repair
Audio Amplifier
PRO TIP: Gottlieb Sound Boards
If your Gottlieb sound board has this satellite board on it you may need to remove and reheat the pins underneath. Read more on how this is done.
Batteries
William’s High Speed Display Problems Fixed
Here’s some tips you can use when troubleshooting display issues on your Williams System 9-11 series pinball machines.
Bally Pinball
PRO TIP: Servicing early Bally and Stern (‘77-‘84 MPU games) display high voltage power supply
Before pulling your early Bally or Stern power driver board out for service always check your display voltage as it can run high meaning there’s a failure in your high voltage display power circuit.