• Anyone using the factory Gottlieb System 3 test fixture?

    From John Robertson@spam@flippers.com to rec.games.pinball on Saturday, May 29, 2021 15:04:55
    From Newsgroup: rec.games.pinball

    I've run across something twice now - the fixture won't test the MPU
    "TEST" switch reliably and says there is a fault. What I ended up doing
    was add a 2K2 resistor on clips to pull down the pullup resistor for
    that input, and now it seems just fine.

    Anyone else run into this? I am pretty sure the 8255 drver can sink the
    2ma required to make a low input as the TILT and SLAM both work fine,
    and they too need a 2ma sink each to switch.

    John :-#)#
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