Lexmark 7462 series Service Manual page 675

Media size sensing
The media size set for the media tray assembly is set by positioning the right media guide, unlocking the slider
lock, and sliding the rear paper guide. The rear paper guide triggers the movement of the auto size sensing
finger, which then sets the switches of the controller card board. The combination of on/off position of the three
switches provides information of the media sizes to the engine.
Media size
actuator
Sensor
(pass through)
HCF drawer
assembly
Media size
Unknown
A4
Legal
B5
A5
Executive
Letter
Custom
Note: Media size sensing through on/off switch combination
# Part
1 Lockable back restraint
2 Media end guide
3 Auto size finger actuator
4 Rear media tray guide
Pick arm
assembly
Switch 1
OFF
OFF
OFF
OFF
ON
ON
ON
ON
Appendix C: Theory of operation
675
Sensor (media empty)
Sensor (media low)
Sensor
(tray raised HP)
Tray lift drive motor
Switch 2
OFF
OFF
ON
ON
OFF
OFF
ON
ON
7462
Switch 3
OFF
ON
OFF
ON
OFF
ON
OFF
ON