Switch (Media Size); Multi-Purpose Feeder (Mpf); Sensor (Media Empty); Mpf Feed Roll - Dell 5230dn Mono Laser Printer Service Manual

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.

Multi-purpose feeder (MPF)

The MPF is a mechanical unit supplying media to the printer. The driving force from the main drive motor drive
motor is transmitted to the MPF pick roll to feed media.

MPF pick solenoid

Sensor (MPF media empty)
MPF pick roll assembly

MPF feed roll

The MPF pick roll feeds the media set on the MPF into the printer.
MPF pick solenoid
The MPF pick solenoid transmits the driving force from the main drive motor assembly to the MPF pick roll.
Sensor (MPF media empty)
The sensor (MPF media out) detects whether media is present on the MPF.
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Diagnostic aids