Ok this is the last issue on my NIP-IT...
It operates perfect except for the bonus reset. When the bonus unit resets ok in a rare case, it adds bonus correctly when it should and bonus is awarded correctly on multiball start or end of ball.
My problem is in the reset circuit. It resets and starts a game.
But normal operation is (I think) that the bonus unit is reset on a new game, new ball, new player, ... and a 1000 is immediately added by default.
My machine does run the sequence on reset, and I see the coil activating for the reset on the bonus unit. Which is immediately followed by a coil pulse for the bonus step up solenoid.
If I ad another player immediately I see the same thing happening in the sequence.
If I add a 2nd player half way a game with some bonus build up (still in ball 1 on player 1), the game leaves the unit ok (does not reset it) which is as it should it think.
However my game does not do a fully step up to the 1000 after the reset. It seems like it's just not strong enough and doesn't make it to reach the first thousand.
If I do it manually from the zero position it steps up correctly and I can play correctly. Bonus is added when hitting target or crocodile lane.
If the stepper did not succeed in going to the default 1000 on ball start. It doesn't add bonus in normal gameplay when the target to add bonus is hit.
Things I tried:
-cleaning the wiper on the bonus unit
-adjusting the 3 switches on the bonus unit. The one that is closed when bonus is just reset and is opening as soon as 1000 is added. The one that
-the one that is open in the bonus zero position but closes when the first 1000 is added
-the one every time the step up solenoid is triggered that opens during solenoid activation
In the reset circuit the bonus step up is triggered from somewhere. Perhaps I have a dirty contact there?
Or anything else that I should check. Maybe the switches are not set correctly when I bought the game.
Maybe the wiper doesn't go to the full bonus 00 position (but the zero reached leaf switch is closing?)
I have the schematics and studied it for half an hour, but I still have difficulties the way I should read sequences.