10-13
Troubleshooting > Troubleshooting
Black or colored points 
appear in white background 
parts of the image. 
Is the original holder or the glass platen 
dirty?
Clean the original holder or the glass
platen.
page 10-2
― Run [Drum Refresh] page 10-34
― Select the [System Menu/Counter] key 
> [Adjustment/Maintenance] > 
[Service Setting] > [MC] and increase 
the adjustment value. 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.
―
White or color dots appear 
on the printed images. 
― Select the [System Menu/Counter] key 
> [Adjustment/Maintenance] > 
[Service Setting] > [MC] and decrease 
the adjustment value. Decrease the 
adjustment value 1 level at a time from 
the current value. 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.
―
― Select the [System Menu/Counter] key 
> [Adjustment/Maintenance] > 
[Service Setting] > [DEV-CLN], and 
then select [OK].
―
Printed images are fuzzy.  Is the machine being used in conditions 
of very humid, or humidity or 
temperature rapidly changes?
Use in an environment that has suitable 
humidity.
―
― Run [Drum Refresh] page 10-34
Printed images are skewed.  Are the originals placed correctly?
When placing originals on the platen, align 
them with the original size indicator plates.
page 5-2
When placing originals in the document 
processor, align the original width guides 
securely before placing the originals.
page 5-3
Is the paper loaded correctly? Check the position of the paper width 
guides.
page 3-4
Irregular horizontal lines 
appear in the image. 
― Select the [System Menu/Counter] key 
> [Adjustment/Maintenance] > 
[Service Setting] > [MC] and increase 
the adjustment value. 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.
―
Symptom Checkpoints Corrective Actions
Reference 
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