Cartridge using tips: 

 1, install, and remove the cartridge should be first off the printer. 

 2, a new cartridge into the printer, should be rocked several times, so loose and uniform toner to ensure the printing effect. 

 3, should avoid direct contact with the light sensitive drum core, and do not touch the photosensitive drum core. 

 4, the toner will run out, no clear and uniform print when writing, remove the cartridge jiggle a few, can continue to print dozens of pages. 

 5, in order to avoid affecting the normal office, the user should always maintain a backup of a new cartridge. 

 6, spent selenium should be properly packaged and placed on an empty, to avoid polluting the environment.