HP Laserjet 1200 - Manual (Page 123)

EN Improving print quality 121
Vertical lines
● Make sure that the priority input tray is in place.
● The photosensitive drum inside the toner cartridge has
probably been scratched. Install a new HP toner cartridge.
See
Changing the toner cartridge for instructions.
Gray background
● Make sure that the priority input tray is in place.
● Decrease the print density setting through HP LaserJet
Device Configuration. This decreases the amount of
background shading. See
Accessing the online help .
● Change the media to a lighter basis weight. See Printer
media specifications for more information.
● 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 for instructions.
Toner smear
● If toner smears appear on the leading edge of the media, the
media guides might be dirty. Wipe the media guides with a
dry, lint-free cloth. See
Identifying the printer’s components
or Cleaning the printer for more information.
● Check the media type and quality.
● Try installing a new HP toner cartridge. See Changing the
toner cartridge for instructions.
● The fuser temperature might be too low. Check Optimize
for: in the Paper tab of your printer driver, and make sure
that it is set to the appropriate media.