Dell 5535dn Service Manual page 293

Switch (media size)
This switch (media size) sets the size of media supplied from each media tray assembly. A signal indicating the
media size is transmitted as a voltage to the printer system card assembly.
Sensor (media empty)
If media runs out in a media tray assembly, the actuator lowers and the actuator flag, unlocks the sensing area
of the sensor (media empty). The sensor light is transmitted. When the sensing area is blocked (media is
present), the signal is off.
Sensor (media low)
This sensor detects by the actuator position whether media in the media tray assembly is low. When the flag of
the actuator blocks, then unblocks the sensing area of the sensor (media low), the media level is determined to
be low
Tray 2 media tray assembly
Note:
Media Size
No Tray
B5L/7.25" x 10.5"L
8.5" x 11"L
A4L
Rear media guide
End guide
Analog switch
S/W1
Off
Off
On
On
Bottom plate
S/W3
Off
On
Off
On
Diagnostic aids
3-81