B710 B720 B730 User’s Guide > 114Routine Maintenance _________Replacing the Drum/Toner CartridgeThe drum/toner cartridge includes the toner and thephotosensitive drum. When it is about time to replace the drum/toner cartridge, the following message will appear on the controlpanel.After this message displays, you can continue to print about 100more sheets. Make sure you have a new drum/toner cartridge onhand.When the following message displays, printing stops and youmust replace the drum/toner cartridge.Note• If you continue to print with a worn-out drum/tonercartridge, it may affect the functions of this printer,such as the print quality.• You can set whether to stop printing when the drum/toner cartridge is due for replacement.Ready to printRepl. Drum/TonerReplace Drum/Toner Cartridge