Background: One of the switch drive rows on my Stern Star Trek has failed such that having 4 or more active switches in that row causes none of them to function. Of course this row would contain all the trough switches which makes this a common occurrence. We found a cooked R30 on the board. Swapping CPUs yields a perfectly working game.

The PDF schematics on Stern's website are completely (purposefully?) illegible. I need to know what components feed J1/pin 3 (green/red) -- specifically going through R30. Surface mount technology makes this tough to probe out, and was hoping that someone here might have a clean, readable copy of page Y56 of the manual (or any SAM schematics showing the switch strobes).

Thanks in advance!