Test Fixture Gottlieb System 80/A/B driver set
2 board set of bench test equipment for Gottlieb® System 80, 80A, and 80B driver boards, designed by Pascal Janin.
Small board description:
The 5V general power supply is taken from A3J3 (and A3J5), with an overload protection (resettable polyswitch fuse). This protection is mandatory if the 5 coil outputs are used simultaneously (current > 500mA).
A screw connector can be used to power the board with a more powerful power supply if needed. Power input is selected via a 3-position jumper.
Please note that the polyswitch overcurrent protection only protects the 5V power supply coming thru A3J3 (A3J5).
CONNECTING AND TESTING
The 3-position jumper selects the 5V source
To test a driver board in an unknown condition, remove the 5 coil jumpers. This way, the load resistors are disconnected.
The connectors are aligned with the driver ones. Switch OFF the pinball and insert the test board connectors into the driver board connectors. Then power ON.
At power up (immediately for System 80A games or after 5 seconds for System 80 games), the 2 TILT and GAME OVER LEDs briefly blink together, then the lamp LEDs will be driven by the CPU, or cycle if the attract mode has been activated.
No coil LED should be lit except if there is a fault on the driver board.