Just got the parts to try and repair the Bonus Stepper Unit which had missing the wiper assembly and the gear/shaft. Got it put together and trying to get it to work. The Bonus Unit seems to be doing nothing. When I reset the game it completes it's reset but the ball kicker will not kick the ball out. The switch doesn't seem to do anything. Turns out that part of the switch stack at the Bonus Unit is tied into the kicker circuit, I think. It looks like *if* the bonus unit was running when the stepper goes through all 15 steps it closes a switch (and opens 2 closed ones) at the stack. When this happens, the kicker kicks the ball out, then the ball travels over another switch on the way to the outlane. That switch seems to set the ball count (or tell the ball count unit to do it) and also resets the Bonus Unit. When the ball drains again, nothing happens at all, the same as game start. I have to close that switch on the bonus switch stack to make something happen. So, when the kicker's switch closes when the ball drains, what should happen? What relays are involved or ?? Trying to read the schematic and getting slowly better at that but not very good yet.

To make sure of something, at that bonus stepper stack, there are 2 outer switches that are closed and then a single inner blade that gets closed when the wiper gets all the way around and opens the first switch which causes one of the switch blades to touch, ie close, the center switch, like this I think. These looked all bent out by the previous owner, looked like he was bypassing the bonus unit completely.

before unit runs blade1<->closed<->blade2<->open<->blade3<->open<->blade4<->closed<->blade5
at end of 15 steps blade1<->open<->blade2<->closed<->blade3<->open<->blade4<->open<->blade5

Feel like I am getting closer, but alas not there yet.

Help, David

Got Bonus Stepper Switch sorted out (Thanks Darcy), though the switch could still have a problem, at least I know how it's supposed to be stacked up. Rest of the above msg still applies though.

Anybody got some ideas?

Thanks

I can trip that relay by hand and it puts points on the score, but the bonus stepper unit doesn't move. Not sure what that relay does unless it is supposed to put up points when the bonus stepper unit runs and *tells* it too? Haven't had to do any soldering thus far, when I worked on the bonus unit, I was replacing the gear/shaft and the wiper unit which required no soldering. The coils and switches are the originals that were already on my bonus unit. Trying to figure out what relays tell the bonus unit to actually run at the end of a ball?

Thanks

When I start a game the kicker does not shoot the ball into the lane. If i manually close that middle switch on the bonus stepper switch the ball kicks out.

Not sure what happened as I posted a response to this, but it's not showing up. He us a shorter version anyway.

The Bonus Stepper unit doesn't run when the ball goes into the outhole so that middle switch on the bonus unit never closes. So it would seem that something is not completing in that series of events you listed before the bonus unit is supposed to run it gets to that point and does nothing. Will try and review that series of steps.

One thing that could be playing into this us that when a game is started the score motor runs but doesn't complete. I have to manually engage the DX Relay which then signals the AX Relay to complete I think before the reset completes. Both of those relays are in the path for the kickoff as well. Not sure what is happening there yet either.

the for the help and the patience ..... D

OK, got most everything working .The DX Relay needed adjusting and the Bonus Unit rebuild work was *mostly* correct, but needed some adjustments and additional parts replaced. Still need to go over a few things to see if there are any other issues. We'll see what I run into next, fingers-crossed. Thanks folks.