Offset Motor; Main Motor And Main Drive Assembly - Lexmark W820 Service Manual

4025-XXX

Offset Motor

During Offset Mode, the MCU switches on the Offset Motor. The Offset Motor transmits
drive to the Offset Bracket. The Motor drives the Bracket toward the front of the printer,
pushing the Offset Roll along with it, until the Bracket reaches the end of travel, where it
stops. The MCU again switches on the Offset Motor, which drives the Bracket toward the
rear of the printer, carrying the Offset Roll along with it.

Main Motor and Main Drive Assembly

The MCU PWB switches the Main Motor on and off. The rotation of the Main Motor
creates mechanical drive.
The Main Drive Assembly gears transmit the motor drive to Feed Clutch 1, Feed Clutch 2,
and the MP Feeder Feed Clutch. At paper feed, the MCU PWB actuates a Feed Clutch,
which in turn transmits drive to the appropriate Feed Rolls.
The Main Drive Assembly gears transmit the motor drive to the Registration Clutch. At a
specific point in each print cycle, the MCU PWB actuates the Registration Clutch, which
in turn transmits drive to the Registration Roll.
The Main Drive Assembly gears transmit the motor drive to the Fuser Drive Gear. When
the Left Upper Cover is closed, the DTS Link Rod pushes the Fuser Drive Assembly into
contact with the Fuser Drive Gear, which transmits drive to the Fuser Rolls.
The Main Drive Assembly gears transmit the motor drive to the Exit Drive, which transmits
drive to the two Inverter Clutches. At a specific point in each print cycle, the MCU PWB
actuates either the CW Clutch or the CCW Clutch which drive the Exit Roll and the Offset
Roll.
Drum Motor and Main Drive Assembly
The MCU PWB switches the Drum Motor on and off. The rotation of the Drum Motor
creates mechanical drive.The Main Drive Assembly gears transmit the motor drive to the
Drum. When the Drum Motor is on, the Drum rotates. When the Left Upper Cover is
closed, the BTR gear contacts the Drum gear, which in turn rotates the BTR.
Lift Motors 1 and 2
When a Paper Tray is installed in the printer, the MCU PWB switches on the Lift Motor.
Each tray has a square metal shaft running along one side of the tray. Attached to the
shaft is an L shaped metal tongue. When the tray is inserted into the paper feeder, a pin
at the end of the shaft engages the Lift Motor gear. When the MCU PWB switches on the
Lift Motor, the motor rotates the square shaft. The square shaft shifts the attached metal
tongue, which in turn raises the tray Bottom Plate which raises the paper stack. As the
paper stack raises, it pushes up on the No Paper Actuator, which in turn switches the No
Paper Sensor.
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Service Manual