By depressing the program change button, a circuit
is closed to the motor, and the program change motor
starts to rotate, until switched off by the a 5 blade
switch in the three groove cam
,
after a 120 degree rotation.
Once stopped, the switch lever assemblies
-
are in a fixed position (see diagram below).
The combination of switches
and
determine the position of the program
panel by a notch in the wheel, and activates the first 20 selections on the corresponding
panel.
Switches
and
activate the last 20 selections on
one of the three selection panels.