Hcf Media Feed Unit Assembly Sensor/Motor Functions - Lexmark X95 series Service Manual

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Thus, media is transferred from the HCF media transport roll assembly to the laser printer.

HCF media transport

roll assembly

HCF media feed unit assembly sensor/motor functions

Functions of the sensors and motors of the media feed unit assembly are outlined below.

HCF media feed lift motor—is a stepping motor that rotates (forward) the pick roller and feed roller to

send media from the tray to the HCF media transport roll assembly. The motor also lifts the tray by reverse

HCF pick solenoid—Raises or lowers the pick roller. The HCF pick solenoid stays activated from the

beginning of media feed until the sensor (pre-feed) turns on. The HCF pick solenoid is activated when the

tray is inserted and when the power is turned on to check the presence of media in the tray.

Sensor (pre-feed)—Detects whether media has been fed from the tray, and controls the HCF feed lift

motor speed. The sensor also becomes a trigger to deactivate the HCF pick solenoid. The sensor turns on

upon detecting media, and determines that media is present.

HCF transport motor—is a stepping motor that rotates the HCF media transport roll assembly to feed

media to the printer.

Sensor (tray 5 feed-out)—Detects whether media has been fed from the tray, becomes a trigger to stop

the HCF feed lift motor, and controls the HCF transport motor speed.

Sensor (tray 5 feed-out)

HCF transport motor

Diagnostic aids