Machine starts up and resets properly. Insert coin and player 1 lights up, ball 1. Score points, ball goes to out hole, bonus added then player up goes to player 2. Score points, ball in out hole then it goes to player 3, this keeps up until it gets to player 4 then it stays there until ball count goes to 5 and game over.

If set for 3 balls per game it goes player 1, 2 ,3 then game over. If I start a 5 ball, 2 player game it goes player 1,2,3,4 then each drained ball the ball in play increments.

Problem is the player up stepper in the head increments every time a ball drains regardless of the number of players. I am not sure of how this is supposed to work. It seems it should have something to do with the player reset relay but I get lost in the schematics. Can someone explain the sequence of operation for a 1 player game?

All steppers have been cleaned and operate nicely, all relay switches have been cleaned and adjusted, all coils are good. There was some previous work done around the player reset relay and there was a broken wire there that I repaired.

Thanks for any help that can be provided.

Thanks for the replies. The EOS on the ball count is okay. I read through the links provided several times, 2 of which I had seen before.

Still don’t understand what is supposed to keep the player up step up coil from firing. I can put a piece of paper in 4B SCM and it doesn’t fire and I can play a 1 player game. So it seems like the player reset relay needs to be energized to keep the player up step up coil from stepping. It does fire but only very briefly. I will try decreasing the gap on the EOS ball count unit to see if that helps.

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Thank you MarkG , it was the motor 1C switch! I’m glad it was not the player reset relay that is clear in the back of the bottom board, lol. It only took the smallest amount of tweaking. I played a 3 ball 1 player game and a 2 player game and it worked fine. Now I need to continue to check out the rest of the functions.

Thanks again for clearly explaining how this circuit works. I may have gotten there myself but it would have taken a couple of days so thanks for saving me some work.