Chicago Coin Sound Stage uses a photo cell to register the spins on the wheel. The one on my game gave up.
Took an oil burner cad cell $3.98 and a piece of laminate and made my own. I had to add the cover with a hole in it because it was too sensitive. I had the game almost 4 years and never had a problem.
First photo is original
Next two photos: fabbed switch with another cad cell next to it.