Hi Pinside, long time reader and recently got my first pin for the family...NBA Fastbreak. We loved it the first week we had it but I've been trying to fix it for a couple weeks now and the kids are anxious to start playing it again (and me too!).
Machine is in excellent shape but solenoids #9-16 aren't firing (confirmed running T.4 test), the biggest issue being I can't get the ball trough ejector to fire so no balls come up into the shooter lane. I've read on this site and others and watched lots of videos what could be the problem (and learned a lot in the process), but am at the end of what I know to try. I think I'm missing something or perhaps tested something wrong.
I tested the optos and they seem to be in good order, fuses all test good, all wiring/connections look intact, resistance tests with DMM where it should be, transistors look good. I notice in the manual the solenoids not firing (#9-16) connect to J113 and J133 and these all look good too. I'm not sure exactly how to best test these wires and think the problem could be related to J113 or J133 even though they look good/intact.
Thank you for any help!!!!