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.
Please note that the 50-pin IDC connector at the top of the board is no longer supplied as shown in the picture above. It is not used with the Gottlieb OEM harness.
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.