Lexmark XC4150
Open door B.
Remove the toner cartridge.
Unpack the new toner cartridge.
Insert the new toner cartridge.
Close door B.
Avoid printing delays. Install a new imaging unit when the printer prompts you to replace it.
Are you seeing blurred text or unclear image in your fax messages? Try enhancing print quality, replacing a toner cartridge, or simply decreasing transmission speed.