Dell 1135n Multifunction Mono Laser Printer - Manual (Page 124)

If background scatter covers the entire surface area of a printed page,
adjust the print resolution through your software application or in Printing
Preferences (See
Opening printing preferences ).
Misformed characters If characters are improperly formed and producing hollow images, the paper
stock may be too slick. Try different paper (See
Print media specifications ).
If characters are improperly formed and producing a wavy effect, the
scanner unit may need service (See
Cleaning the scan unit ).
Page skew Ensure that the paper is loaded properly.
Check the paper type and quality (See
Print media specifications ).
Ensure that the guides are not too tight or too loose against the paper stack.
Curl or wave Ensure that the paper is loaded properly.
Check the paper type and quality. Both high temperature and humidity can
cause paper curl (See
Print media specifications ).
Turn the stack of paper over in the tray. Also try rotating the paper 180° in
the tray.
Wrinkles or creases Ensure that the paper is loaded properly.
Check the paper type and quality (See
Print media specifications ).
Turn the stack of paper over in the tray. Also try rotating the paper 180° in
the tray.
Back of printouts are dirty Check for leaking toner. Clean the inside of the machine (See Cleaning the
inside ).
Solid Color or Black pages The toner cartridge may not be installed properly. Remove the cartridge and
reinsert it.
The toner cartridge may be defective. Remove the toner cartridge and install
a new one (See
Replacing the toner cartridge ).
The machine may require repair. Contact a service representative.
Loose toner Clean the inside of the machine (See Cleaning the inside ).
Check the paper type and quality (See Print media specifications ).
Remove the toner cartridge and then, install a new one (See Replacing the
toner cartridge ).
If the problem persists, the machine may require repair. Contact a service
representative.
Character Voids Character voids are white areas within parts of characters that should be solid
black:
If you are using transparencies, try another type of transparency. Because of
the composition of transparencies, some character voids are normal.
You may be printing on the wrong surface of the paper. Remove the paper
and turn it around.
The paper may not meet paper specifications (See
Print media specifications
).
Horizontal stripes If horizontally aligned black streaks or smears appear:
The toner cartridge may be installed improperly. Remove the cartridge and