Solving Problems with Printing Quality 
125
Image defects. The laser lens is dirty. Clean the laser lens.
A toner cartridge may 
be leaking.
Remove the toner cartridges and 
check for damage. If it is damaged, 
replace it.
A toner cartridge may 
be defective.
Remove the toner cartridge with the 
color causing the abnormal image. 
Replace it with a new toner cartridge.
The imaging unit may 
be defective.
Remove the imaging unit and check for 
damage. If it is damaged, replace it.
Lateral lines or 
bands appear on 
image.
The printer is not level. Place the printer on a flat, hard, level 
surface.
The media path is dirty 
with toner.
Print several sheets and the excess 
toner should disappear.
One or more of the 
toner cartridges may 
be defective.
Remove the toner cartridges and 
check each for damage. If one or more 
is damaged, replace it.
The imaging unit is 
defective.
Remove the imaging unit and check for 
damage. If it is damaged, replace it.
Colors look 
drastically wrong.
One or more of the 
toner cartridges may 
be defective.
Remove the toner cartridges and verify 
that the toner is distributed evenly on 
each cartridge roller, and reinstall the 
toner cartridges.
One or more of the 
toner cartridges may 
be low or empty.
Check the control panel for an X LOW 
or 
X EMPTY message. If necessary, 
replace the specified toner cartridge.
Colors are not 
registering 
properly; colors are 
mixed or have 
page-to-page 
variation.
The top cover is not 
properly closed.
Make sure that the top cover is closed.
The imaging unit is not 
correctly seated.
Remove the imaging unit and reinstall 
it.
One or more of the 
toner cartridges may 
be defective.
Remove the toner cartridges and 
check each for damage. If one or more 
is damaged, replace it.
The media is moist 
from humidity.
Remove the moist media and replace it 
with new, dry media.
Symptom Cause Solution