Quoted from Shapeshifter:Follow up question after more testing and I cleaned all 9 switches.
The top 4 of A,B, C, and D are for sounds.
Middle 4 score points.
Bottom 4 give the grid letters/numbers.
What I can't figure out is this. Do all 3 switches have to register for the bottom switch to give the letter/number?
It seems that way in testing in that if I just press bottom switch nothing happens?
If this is true, then it explains why sometimes a number/letter is not awarded as the plastic ball only needs to not trigger one of the 3 switches. So, all 12 switches needed to be cleaned and gapped perfectly?
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I was wondering the same. (Why 3 switches per column in bagatelle.) Thanks for that info! I have noticed the same...sometimes a grid letter is not awarded in the bagatelle game when it should. I JUST recently cleaned all 12 switches and adjusted any that needed it. I made sure that when using my finger to test the switch in switch test that I didn't have to push the switch down too far for it to register. I noticed one zeener diode was broken and that switch was not working so I replaced that and that switch now works.
Here is what I think is the answer to your question.... The caps on the switches likely need to be replaced. They get old and dry up and do not do their job as effectively. They help switches that are hit very fast to register. So far I replaced the 3 caps on the rightmost column switches as I know that column has not registered before occasionally. I may end up changing the caps on all 12 switches. Pretty easy to do. I just cut the legs of the old caps but left room to solder the new caps to the old legs. I did dremel the old caps legs a bit just to polish them up and give them a nice fresh soldering surface 1st though.