User`s guide

Basics Sensing System Theory - 24
Sensing Switches
Sensing switches attach to a
circuit board and do not use
photo interrupters.
Switches are actuated by leaf
springs that press inward as
you insert a cassette tray or
close the top cover.
Failure in sensing switches
can be either mechanical or
electrical. When
troubleshooting switches,
first confirm that the
actuator has not broken off
and then confirm that the
leaf springs are not bent or
Circuit Board
Leaf Spring
Microswitch
Actuator
Microswitch ON
Microswitch OFF