I am doing some work on Williams Casanova, and its giving me some random weird behavior. Any chance you can help me troubleshoot?
Issue1. At random times, the small ball coil (bagatelle in the head) will NOT fire the small ball after the main ball has drained. The small ball in the bagatelle should fire every time, almost immediately when the main ball drains. It seems that when you launch the main ball, and once the main ball goes through one of the 4 rollovers at the top, the transfer relay SHOULD change state. I am seeing a pattern with this particular issue, and on occasion, the transfer relay is randomly NOT changing state as it should, and when this happens, then the bagatelle wont fire.
Issue2. At random times, when the main ball drains, the ball unit will NOT advance to the next ball. Say if your on ball 2, and it drains. You might get the ball kicked to the shooter lane and the ball unit will still be on ball 2. The ball advance unit has been properly cleaned and it operated smooth as silk, so I will rule that out. I am seeing a pattern where the ball index does not revert back to its home position when it should.
I have checked all switches on the scoring motor, and ball index, outhole and transfer relays. They look good. But my gut thinks these mentioned relays and the functions that cause them to change their states, are possibly contributing to these issue. Its just mind boggling the randomness that I am seeing with these issues, especially from an EM.
I also saw a yellow high volt wire screwed to the ball advance unit...coil bracket. This just seems very suspect to me. Is this normal? If not, any idea where this high volt wire with a screw eyelet would attach? I can find any spot in that area, that it should screw to.
Link to the scematic.