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4069-XXX
Print Quality - Random Marks
Service Tip: The primary cause of random marks is due to loose
material moving around inside the printer and attaching to the
photoconductor, charge roll or transfer roll.
Symptom
1
Random Marks
Print Quality - Blurred or Fuzzy Print
Blurred of fuzzy print is usually caused by a problem in the main
drive gearbox assembly, alignment assembly, any feed roller or in
the transfer roll bearings or transfer roll. Check the gearbox
assembly for correct operation. Check the transfer roll for binds or a
contaminated shaft or bearings.
Blurred print can also be caused by incorrect feeding from one of the
input paper sources, paper trays, duplex or envelope feeder.
Check the high voltage contacts to ensure they are not bent,
corroded or damaged. Replace as necessary.
2-96
Service Manual
Action
Check the print cartridge for any
signs of loose or foreign material that
might be on the photoconductor.
Check the transfer roll and charge
roll for any pieces of material that are
stuck to the rolls.
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