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Gottlieb System 80 Driver
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.