Dell C5765dn User Manual page 518

22 Problem Solving
Symptom
Black or colored
lines are printed.
Dirt appears at
equal intervals.
Paper feed
direction
White dots
appear in black
filled areas.
Printed toner
smudges when
rubbed with your
finger.
Toner is not
fused.
The paper is
soiled with toner.
518
Cause
The drum cartridge has
deteriorated or is damaged.
The machine interior (laser
scanners) is dirty.
The constant velocity
transport glass on the
document feeder is dirty.
The paper path is dirty.
The drum cartridge has
deteriorated or is damaged.
The paper is unsuitable.
The drum cartridge has
deteriorated or is damaged.
The paper is damp.
The paper is unsuitable.
Remedy
Replace the drum cartridge with a new one.
Refer to "Replacing Drum Cartridges C, M,
Y, or K" (P.223).
Clean the machine interior.
Refer to "Cleaning the Interior (Laser
Scanners)" (P.240).
Clean the constant velocity transport glass.
Refer to "Cleaning the White Chute and
Constant Velocity Transport Glass" (P.246).
Print a few pages to remove the dirt.
Replace the drum cartridge with a new one.
Refer to "Replacing Drum Cartridges C, M,
Y, or K" (P.223).
Load suitable paper.
Refer to "Loading Paper" (P.207).
Replace the drum cartridge with a new one.
Refer to "Replacing Drum Cartridges C, M,
Y, or K" (P.223).
Replace the paper with new one.
Refer to "Loading Paper" (P.207).
Load suitable paper.
Refer to "Loading Paper" (P.207).