https://pinside.com/pinball/forum/topic/tz-s-geneva-switch

Had this issue a few months ago. The Geneva switch needed to be adjusted. Simple however getting to the switch to adjust it correctly is not simple. Had to remove the back board and loosen the ramps in order to remove the gum ball assembly. In order to remove the backboard off of the playfield you need remove the diverter mech to the gum ball that hides one of those screws attached the back board. If you don’t mind removing the ramp you don’t need to remove the backboard but either way a bitch to get to.

Once your gumball is out of the machine check the switch make sure it clicks when activated and adjust it so it initiates the click when the motor turns. If your not getting a solid click when the switch activates install a new switch. I was lucky and all I needed was to adjust the switch position and bend the wire a bit to get the switch working again.

Good luck with your quest. If anyone needs a spare gum ball assembly I have one that I would sell for $250 bought it on eBay 17 years ago don’t think I need it collecting dust anymore but it was nice to get a reference to look at before I made the decision to remove the current one.
Regards
Al

Are balls being loaded into the gumball machine and released from it ? If not then check the diverter that directs the ball to be loaded into it.

Or test the gumball machine in tests.

If it isn't getting loaded and unloaded, it would never trigger the geneva switch.

LTG : )

Did you try it in Tests - Gumball machine ?

Next, motor plugs onto a small board nearby under the playfield. Connectors all plugged in ? Power to motor ? Power to the board ?

LTG : )