2-50 Service Manual
5056-XXX
Service checks
Drive 1 DC motor service check
Paper exit motor service check
Duplex unit service check
FRU Action
1 • DC motor
• Drive unit 1
• Printer controller board
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.
FRU Action
1 Paper exit motor 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.
FRU Action
1 Feed roller belts Check for wear or damage to the feed roller belts. Replace as
necessary.
2
• Duplex stepper motor
• Side fence
• Stepper motor gears
Be sure the stepper motor turns freely with no binding.
Check for wear or damage to the associated gears.
3
• Feed roller solenoid
assembly
• Paper re-feed solenoid
assembly
Check for proper operation of the solenoid and linkage. Replace as
necessary.
4
Photo-interrupter assembly Ensure that the photo-interrupter actuators are operating correctly
and are in the proper position.
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