HP LaserJet 1100 All-in-One Printer series - Manual (Page 87)

EN Improving print quality 77
Gray background
● Decrease the print density setting. This will decrease the amount
of background shading. Access this setting under “Printer
properties (driver).”
● Change the paper to a lighter basis weight. See “Printer paper
specifications.”
● Check the printer’s environment; very dry (low humidity)
conditions can increase the amount of background shading.
● Install a new HP toner cartridge. See “Changing the toner
cartridge.”
Toner smear
● If toner smears appear on the leading edge of the paper, the
paper guides may be dirty. Wipe the paper guides with a dry, lint-
free cloth. See “Printer components” or “Cleaning the printer.”
● Check the paper type and quality.
● Try installing a new HP toner cartridge. See “Changing the toner
cartridge.”
Loose toner
● Clean the inside of the printer. See “Cleaning the printer.”
● Check the paper type and quality. See “Printer paper
specifications.”
● Try installing a new HP toner cartridge. See “Changing the toner
cartridge.”
Vertical repetitive defects
● The toner cartridge may be damaged. If a repetitive mark occurs
at the same spot on the page, install a new HP toner cartridge.
See “Changing the toner cartridge.”
● Internal parts may have toner on them. See “Cleaning the
printer.” If the defects occur on the back of the page, the problem
will likely be corrected after a few more printed pages.