Component S1 / EVQP7 switch


#1

Hello, trying to figure out what exactly component S1 does. I noticed the EVQP7 switch lifted off my board after moving it into a new case, I am generally very careful but obviously this time I was a little reckless with it.

My electronics background is relatively basic so I have been able to trace the part on the schematic and figure out what it is, it's one of the EVQP7 switches connected to IC2. Although this information doesn't help me in determining how crucial the part is or what the actual function of it is. Any ideas?

It DOES power on and still seems to perform as normal.

Any help would be greatly appreciated!

Schematic -
http://www.axoloti.com/wp-content/uploads/2013/12/axoloti-core-sch-v10.pdf


#2