I have a Playboy that won't kick the ball into shooter lane, does not work in solenoid test either. Game goes into game and if you manually load ball all works fine, registers end of ball when it enters out hole but won't reload it. On Playboy the U1 3081 only serves one coil (out hole) so replaced it and no change. Changed the 74154 in case that was an issue but still not working. Changed the Tip102 drive transistor and if you ground it, or the coil lug it kicks.

Any ideas, don't normally get stumped on Bally -35 machines but this one is really weird

No ill check now and come back

Found 3 stuck switches, cleared them but out hole still not kicking out

It's an Altek new board so MPU connector is fine, Solenoid connector is good too. I'll check the CR8 R20 and put in another TIP102 and report back

I took out every connector from the female plugs and cleaned them so they are all good too, I'll try sons of my spare -35 MPU's in it and see if that makes sny difference and see if I have a working Soldnoid board spare to see if the problem remains or goes away

Cheers
Brian

Just swapped out with known working MPU and same issue, swapped out solenoid board too and same issue. Put the solenoid board into a vector and it kicks coils 2 fine so the solenoid board is ok. Playboy also started kicking the right slingshot instead of the Grotto (coil 3) and kicks the right slingshot when it's supposed to in test?? Checked both coils (out hole & Grotto) kick if you earth the transistor tab (on both solenoid boards). Checked the J4 connector on MPU to make sure I hadn't wrongly reinserted the wires after cleaning the connectors and they are all correct and go to correct pins on Solenoid J4. Checked again and no stuck switches, out hole registers switch 8 if you put the ball into out hole. Baffled!!!!!!

Had an MPU -35 installed, put the Altek back in, cleared memory and still the same. Continuity tested the Solenoid momentary wires and solenoid bank select and all ok