Anyone using the factory Gottlieb System 3 test fixture?
From John Robertson@firstname.lastname@example.org 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.
(Please post followups or tech inquiries to the USENET newsgroup)
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