I had one light in the cave not working, traced it to a TIP 120, on the board, swapped it with what I have laying around, TIP 122, and the cave light now works the way it should during game play. One little problem solved.
The cave opto? Is working in reverse, I think this is why it's signal wire is running to a different section than the others. It is normally a broken beam, and when the ball ends up there? The foil on the ball completes the beam. I think?!!! I'm kind of....almost....sure?
Looking at it's design was driving me crazy trying to figure out how this was working at the board. Anyhow, I'm horrible with words look at the pics and see what I mean.
This game has to have a foil covered ball to work, or at least to work at the cave. I may be wrong on this, I'm just taking guess's. Again! Kind of almost sure!
Still haven't solved my coil problem yet....I'll trace it out and post the ic's number next, if I can't solve it before I get back to the board again.
The pic of the balls show the foil coating and what they look like when it's removed. Just kind of stinks it has to be a foil covered ball I kind of like the one that looked like a rock!, both of mine either have foil removed or foil falling apart. The foil covered ball is pictured on it's good side. The other is peeling. Eventually.....I may be able to rework this part to cause a broken beam, to trigger. I'm no where near that far yet!
I did try the foil ball to make sure my guess worked out. It does complete the path of the opto's, and drops signal from 10v to 5v. it will also stay at 5v when unplugged from the sensor. So.....trying to get that coil to stop with the opto unplugged? may not work like I thought. This gets confusing....haha.... unplugging the sensor? The CPU thinks there is a ball there! Now that I know this? I'll start fresh and try from the beginning.