User Guide

129 > B411/B431 Troubleshooting
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.
Toner is low and 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.
Fuzzy print. LED array is dirty. Clean LED array.
Distorted
print.
Paper path, lamp
assembly, or fusing unit
problem.
Generate cleaning
page.
Contact service.
Smeared or
blotched
print.
Dirty rollers; toner
dropped inside printer or
image drum problem.
Replace image drum
and toner.
Contact service.
Printed page
is light/
blurred.
Is toner low? Replace toner
cartridge.
Is paper meant for laser
printers?
Use recommended
paper.
LED array is dirty. Clean LED array.
Bold
characters
and dark lines
are smeared.
Toner is low. Install new toner
cartridge.
SYMPTOM PROBLEM SOLUTION