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B4400, B4400L/B4600, B4600L User’s Guide – Troubleshooting > 91
P
RINT
QUALITY
PROBLEMS
Before consulting a service representative regarding a print
quality problem, check the table below to see if there is a
solution, or something you might have overlooked.
SYMPTOM PROBLEM SOLUTION
Blank sheets
printed.
Image drum
cartridge not
properly installed.
Reinstall image drum cartridge.
Empty or missing
toner cartridge.
Install new toner cartridge.
Entire page
prints faintly.
Empty toner
cartridge. Pages
get fainter when
toner is used up.
Install new toner cartridge.
LED array is dirty. Clean LED array.
Page has grey
background.
Static electricity,
generally from dry
environments,
causes toner to
stick to
background.
Change paper to a smoother laser
bond or use a humidifier.
Page prints all
black.
Hardware problem. Contact service.
Page has
repetitive
marks.
Damaged image
drum cartridge
causes repetitive
marks every 1.6
inches (4.06 cm)
due to surface
nicks and
scratches.
Generate a cleaning page,
repetitive marks may be
temporary.
Oblong area of
faint print
appears on each
page.
Drop out caused by
using paper
exposed to high
humidity.
Change paper stocks, check paper
storage environment or use a
dehumidifier; check toner level.
Vertical white
streaking or
faint areas on
page.
Ton e r is l ow an d
does not distribute
properly, or the
drum is worn out.
Replace toner cartridge. Check
drum and replace the drum, if
necessary. Contact service.
LED array is dirty. Clean LED array.
Vertical black
lines.
Hardware problem. Contact service.
91


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