Dell 1133 Mono Laser User Manual page 11

Toner specks
Dropouts
White Spots
Vertical lines
Black background
Toner smear
Vertical repetitive defects
If the entire page is light, the print resolution setting is too low or the
toner save mode is on. Adjust the print resolution and turn the toner save
mode off. See the help screen of the printer driver.
A combination of faded or smeared defects may indicate that the toner
cartridge needs cleaning (See
The surface of the LSU part inside the machine may be dirty (See
the inside).
The paper may not meet specifications; for example, the paper may be too
moist or rough (See
The transfer roller may be dirty. Clean the inside of your machine. Contact
a service representative.
The paper path may need cleaning. Contact a service representative.
If faded areas, generally rounded, occur randomly on the page:
A single sheet of paper may be defective. Try reprinting the job.
The moisture content of the paper is uneven or the paper has moist spots
on its surface. Try a different brand of paper (See
specifications ).
The paper lot is bad. The manufacturing processes can cause some areas
to reject toner. Try a different kind or brand of paper.
Change the printer option and try again. Go to Printing Preferences,
click Paper tab, and set type to Thick (See
preferences).
If these steps do not correct the problem, contact a service representative.
If white spots appear on the page:
The paper is too rough and a lot of dirt from a paper falls to the inner
devices within the machine, so the transfer roller may be dirty. Clean the
inside of your machine (See
The paper path may need cleaning (See
If black vertical streaks appear on the page:
The surface (drum part) of the toner cartridge inside the machine has
probably been scratched. Remove the toner cartridge and install a new
one (See Replacing the toner
If white vertical streaks appear on the page:
The surface of the LSU part inside the machine may be dirty (See
the inside).
If the amount of background shading becomes unacceptable:
Change to a lighter weight paper (See
Check the environmental conditions: very dry conditions or a high level of
humidity (higher than 80% RH) can increase the amount of background
shading.
Remove the old toner cartridge and, install a new one (See
toner cartridge).
If toner smears on the page:
Clean the inside of the machine (See
Check the paper type and quality (See
Remove the toner cartridge and then, install a new one (See
toner cartridge).
If marks repeatedly appear on the printed side of the page at even intervals:
Cleaning the inside).
Print media specifications
Cleaning the inside).
Cleaning the
cartridge).
Print media specifications
Cleaning the
Print media specifications
Cleaning
).
Print media
Opening printing
inside).
Cleaning
).
Replacing the
inside).
).
Replacing the