I have a Pioneer, it was having issues occasionally; on a Single player game, ball 2 (after player 1 played)would allow for player 2 to play the ball 2. Then it would resume a regular 1 player and end the game after ball 3 was played. I then had a problem starting the next game as the score reels for player 2 would not reset. I was able to solve the problem of the score reels resetting as the stepper unit in the backbox was in need of adjustment. MY issue now is that the stepper unit only steps once after the ball drains. The ball comes out and can be played but the backbox doesn't lite as the next ball) So now the sequence of play is ball 1 plays regular, ball 2 &3 come out but backbox is blank, ball 4 is lit designating it as ball 2, ball 5 & 6 come out backbox is blank. Ball 7 plays as ball 3 Lit on backbox, then game will be over when it drains.So i need the stepper to step 3 times. Unfortunately, my schematics are in storage as i am renovating. Any suggestions would be appreciated Thanks.

So the player unit (stepper) The top switch on the second cam closest to me was not making contact. After adjusting switch, coil "P" activates and follows through the correct sequence that allow the Player Unit to step to ball number 2 as it should--the game now plays correctly Thanks!