Those are electronically operated . Soft touch switches connect through a multipin cable assembly to a control / gateway PCB . I think theyre onto relays.
If youre savvy enough for tech repair , there are service manuals out there.
I know of one GOOD service guy in the Chicago area and one in...
If anyone needs some help on this model with belts , tires ( idler) or cap upgrades on the capstan control , ask
I now have dozens of hours on this model in service and repair