Dell C7765DN MFP Color Laser Printer - Manual (Page 575)

Image Quality Trouble
575
Black or colored
lines are printed.
The drum cartridge has
deteriorated or is damaged.
Replace the drum cartridge with a new one.
Refer to "Replacing Drum Cartridges R1, R2,
R3, or R4" (P.253).
The machine interior (LED
printhead) is dirty.
Clean the machine interior.
Refer to "Cleaning the Interior (LED
Printheads)" (P.260).
The constant velocity
transport glass on the
document feeder is dirty.
Clean the constant velocity transport glass.
Refer to "Cleaning Film and Constant
Velocity Transport Glass" (P.263).
Dirt appears at
equal intervals.
Paper feed
direction
The paper path is dirty. Print a few pages to remove the dirt.
The drum cartridge has
deteriorated or is damaged.
Replace the drum cartridge with a new one.
Refer to "Replacing Drum Cartridges R1, R2,
R3, or R4" (P.253).
White dots
appear in black
filled areas.
The paper is unsuitable. Load suitable paper.
Refer to "Loading Paper" (P.237).
The drum cartridge has
deteriorated or is damaged.
Replace the drum cartridge with a new one.
Refer to "Replacing Drum Cartridges R1, R2,
R3, or R4" (P.253).
Symptom Cause Remedy