6-13
Troubleshooting > Troubleshooting
Printed Image Trouble
When the following printed image trouble occurs, implement appropriate procedures.
Symptom Checkpoints Corrective Actions
Reference 
Page
Printed images are totally 
too light. 
Is the paper damp? Replace the paper with new paper. page 3-2
Have you changed the density? Select appropriate density level. page 4-17
Is the toner distributed evenly within the 
toner container?
Shake the toner container from side to 
side several times.
page 6-6
Is EcoPrint mode enabled? Disable [EcoPrint] mode. page 4-2
Are the drum unit and developer unit 
installed correctly?
Correctly install the drum unit and 
developer unit.
page 6-2
— Make sure the paper type setting is 
correct for the paper being used.
page 4-17
— Select [Adjust print quality] in the 
Maintenance menu, and select 
[Refresh] in [Drum refresh].
page 6-10
Printed images are too dark 
even though the background 
of the scanned original is 
white.
— Select [Adjust print quality] in the 
Maintenance menu, and select 
[Refresh] in [Drum refresh].
page 6-10
—
Select [
Adjust print quality
] in the 
Maintenance menu and set a higher value for 
"Drum charge setting". Increase the 
adjustment value 1 level at a time from the 
current value. If there is no improvement after 
the value is increased by 1 level, increase by 
1 level again. If there is no improvement, 
lower in increments of 1 level from the original 
setting. If there is no improvement after the 
value is decreased by 1 level, decrease by 1 
level again. If there is still no improvement, 
return the setting to the original value.
page 6-10
Black dots appear on the 
white background when 
white original is scanned. 
— Select [Adjust print quality] in the 
Maintenance menu, and select 
[Refresh] in [Drum refresh].
page 6-10
—
Select [
Adjust print quality
] in the 
Maintenance menu and set a higher value for 
"Drum charge setting". Increase the 
adjustment value 1 level at a time from the 
current value. If there is no improvement after 
the value is increased by 1 level, increase by 
1 level again. If there is still no improvement, 
return the setting to the original value.
page 6-10