First Post! I just bought a 1975 Gottlieb Top Score that works quite well, except for one thing- The lights on the rollover add bonus lanes on the right side and some of the targets are supposed to alternate after any scoring event that causes the game motor to rotate (500 point target, etc.) Instead, they stay lit in the same configuration and don't alternate with the result that some stay on all the time and some never light at all. The machine was set to liberal, so I tried changing that to the mid point, but that didn't solve the problem. Where should I look next? I have the manual and schematic, but I am just starting to make sense of the diagram.
One more thing- I would like to separate the action of the two pop bumpers instead of having them cycle together when one is triggered. I can see that the schematic has them wired together. What is the simplest way to accomplish this?
I apologize if these topics have been covered earlier, but I didn't see anything in my search.