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Tuesday 29 May 2018 at 23:33
Quoted from LGFAutos:Think I may have found the problem....
I am using Texas SN7417N chips which after some reading, tap 1 is left of the indent on the top of the chip. When I removed the old chips this indent was at the bottom of the board near the J5 connector, but when I tested that chip the 5v w...
Source: http://pinside.com/pinball/forum/topic/home-for-the-gottlieb-sys1-sys-80b-guys-yep-i-guess-it-a-club/page/43#post-4424500