The problems associated with the original Gottlieb driver board are numerous - connections to the CPU can be corroded and cause poor driver/lamp signals; the MPS-U45 is a very difficult transistor to find; and the old 2N3055 transistors burned holes throu Read more...

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The problems associated with the original Gottlieb driver board are four-fold - connections to the CPU can be corroded and cause poor driver/lamp signals; the MPS-U45 is a very difficult transistor to find; the old 2N3055 transistors burned holes through the PCB, and a failed driver board will cause as much damage to a sound board as a failed sound board would do in reverse. Ni-Wumpf has redesigned the System 80 driver board to address all these issues, and adds in a few more features that should prove useful: Each driver circuit is equipped with fault detection circuitry and LED's to indicate circuit failure.

  • Note: that the LED will remain lit when a game does not support the associated playfield driver components
  • Each solenoid has fault detection circuitry that identifies failed play-field/driver board components
  • FET solenoid transistors
  • Higher rated transistor components for all circuits
  • Discrete components for easier/less-expensive service repair in the future. Using a transistor array is neat, but costly, when one lamp in the array fails!
  • Open-collector interface to the sound board to buffer against failures generated to/from that sourceModern component architecture uses currently available parts for easy field service - only parts that do not normally fail are surface mounted
  • Diode isolated grounds to prevent play-field lamp problems from the board