2-66 Service Manual
5056-XXX
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Print on the page is skewed. Be sure the width guides in the paper tray or the multipurpose feeder fit
snugly against the media you loaded.
Be sure the charge roll or belt is seated properly.
A white gap is noticeable
between color fills, due to poor
color registration.
Be sure all four corners of the printer are resting on a steady flat
surface.
Turn the printer off and back on. The printer calibrates the print head
timing, which may improve registration. Be sure that Auto Registration,
in diagnostic mode, is On.
Possible cause Action
Moist paper Be sure the printer is not in a damp environment and the paper is not
curled or wavy due to moisture. If necessary, inform the customer about
correct storage.
LED printhead Be sure the LED printhead cable is securely connected to the printhead
controller board and LED printhead assembly. If the problem remains,
replace the LED printhead.
High voltage unit (HVU) Be sure all the connectors to the high voltage unit are securely
connected. If the problem remains, replace the high voltage unit.
Printer controller board Be sure all connectors are securely connected to the printer controller
board. If the problem remains, replace the printer controller board.
Printhead controller board If the problem remains, replace the printhead controller board.
Possible cause Action
Photodeveloper drum Clean any dirt from the drum surface. Replace it if it is scratched.
• Fuser detach pawl
• Fuser roller surface
• Fuser thermistor surface
Remove any toner buildup. Replace the fuser.
LED printhead Clean the LED printhead. Print a blank document. Replace the LED
printhead if a black line appears on the paper.
Problem Action
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