Service Checks; Drive 1 Dc Motor Service Check; Paper Exit Motor Service Check; Duplex Unit Service Check - Lexmark C920 Service Manual

5056-XXX

Service checks

Drive 1 DC motor service check

FRU
1 • DC motor
• Drive unit 1
• Printer controller board

Paper exit motor service check

FRU
1 Paper exit motor

Duplex unit service check

FRU
1 Feed roller belts
2 • Duplex stepper motor
• Side fence
• Stepper motor gears
3 • Feed roller solenoid
assembly
• Paper re-feed solenoid
assembly
4 Photo-interrupter assembly
2-50
Service Manual
Action
If the motor does not attempt to turn, and you receive a 910 error
code, replace the driver 1 dc motor.
Be sure the toner and photodeveloper units are not causing an
overload on the dc motor.
If the motor turns, but the paper carrying section of the machine
does not rotate, check the drive 1 unit gear train for damage. Be
sure the clutch on the gear train engages for color printing.
Replace the drive 1 unit if necessary.
If this does not correct the problem, replace the printer controller
board.
Action
Check for frayed insulation on wires connecting the paper exit
motor to the printhead controller board.
Check for severed wires connecting the paper exit motor to the
printhead controller board.
Be sure connector CN09 on the printhead controller board is firmly
connected. If there still is a problem, replace the face-down unit.
Action
Check for wear or damage to the feed roller belts. Replace as
necessary.
Be sure the stepper motor turns freely with no binding.
Check for wear or damage to the associated gears.
Check for proper operation of the solenoid and linkage. Replace as
necessary.
Ensure that the photo-interrupter actuators are operating correctly
and are in the proper position.