150 Chapter 9 Image quality
EN
Imaging drum
CAUTION
Do not expose the imaging drum to light, and be careful not to scratch
or get fingerprints on the drum surface during cleaning. Do not blow
on the imaging drum.
Causes:
• Damage such as scratches or dents on the imaging drum. These
usually appear as black or white marks on the page.
• Paper dust adhering to the imaging drum. These usually appear as
white marks in the dark printed areas of the page.
• Exposure of portions of the imaging drum to light. This causes light
sections in the printed output. The life of the imaging drum is
shortened by exposure to light.
Action:
• Print at least four configuration pages to determine if the defect
repeats in the same horizontal orientation.
• Inspect the imaging drum for scratches, dents, or other damage.
Replace if needed.
• As a last resort, remove the dust with 70% isopropyl alcohol applied
with a hand wipe. Try this
only
if the print defect is unacceptable and
the only other alternative is replacing the imaging drum.
• Defects caused by exposure to light might clear up over time. If
severe, replace the imaging drum.
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