Konica Minolta Magicolor 7450 II User Manual page 198

Symptom
There are
toner
smudges or
residual
images.
There are
toner
smudges on
the back side
of the page
(whether or
not it has
been
duplexed).
Abnormal
areas (white,
black, or
color) appear
in a regular
pattern.
184
Cause
One or more of the
imaging units may be
defective or installed
incorrectly.
The media transfer
roller is dirty.
The media path is
dirty with toner.
One or more of the
imaging units may be
defective.
The laser lens is dirty. Clean the laser lens.
A imaging unit may
be defective.
Solving Problems with Printing Quality
Solution
Remove the imaging units and check
them for damage. If one is damaged,
replace it.
Clean the media transfer roller.
If you think the transfer roller should be
replaced, contact Technical Support
with the error information.
Print several blank sheets and the
excess toner should disappear.
Remove the imaging units and check
for damage. If it is damaged, replace it.
Remove the imaging unit with the color
causing the abnormal image. Replace
it with a new imaging unit.