Dell C7765dn User Manual page 572

23 Problem Solving
Symptom
Part of the image
is missing on the
copy.
The copy has a
stripe pattern.
Color shift of
color copies is
poor, resulting in
unsatisfactory
image quality.
Printing is faint.
(smudged,
unclear)
Black dots are
printed.
572
Cause
Is the paper damp?
Is folded or wrinkled paper
included in the tray?
Is the document pasted or
folded?
Is the enlargement ratio too
large?
Is the color calibration
incorrect?
Is the machine set where it is
exposed to direct sunlight?
The paper is damp.
The drum cartridge has
deteriorated or is damaged.
There is no toner left in the
toner cartridge.
The drum cartridge has
deteriorated or is damaged.
Remedy
If the paper is damp, the copy image may be
partially missing or unclear. Replace the paper
with new one.
Refer to "Loading Paper" (P.237).
Remove the unsuitable paper or replace all of
the paper with new one.
Refer to "Loading Paper" (P.237).
The pasted or folded section may not be
laying flat on the document glass. Place a
stack of white sheets on top of the document
to flatten the document against the
document glass.
Vertical stripes may be printed on the copies
depending on the ratio. Adjust the ratio to
eliminate the stripes.
Refer to "Reduce / Enlarge (Making Enlarged/
Reduced Copies)" (P.70).
Execute auto calibration.
Refer to "Executing Calibration" (P.265).
If the document glass is exposed to strong
light when you turn the machine on or cancel
the Power Saver mode, color shift may occur.
Close the document cover and turn the
machine on, and when the machine becomes
ready to copy or print, turn the machine off
and then on one more time.
Replace the paper with new one.
Refer to "Loading Paper" (P.237).
Replace the drum cartridge with a new one.
Refer to "Replacing Drum Cartridges R1, R2,
R3, or R4" (P.253).
Replace the toner cartridge with a new one.
Refer to "Replacing Toner Cartridges"
(P.248).
Replace the drum cartridge with a new one.
Refer to "Replacing Drum Cartridges R1, R2,
R3, or R4" (P.253).