C7350 User’s Guide> 122CHANGING THE TONER CARTRIDGEWhen the toner is running low, *** TONER LOW is displayed inthe control panel (*** is the colour name). If printing continueswithout replacing the toner cartridge, CHANGE *** TONER isdisplayed and printing is cancelled. Depending on the operatingenvironment, print may become feint before this message isdisplayed. At this stage, remove the toner cartridge and checkwhether it is empty; if so, the toner cartridge needs to bereplaced.Cartridge life is approximately 10 000 A4 pages at 5% printdensity. The first toner cartridge installed in a new image drumneeds to be replaced after less than this amount because thetoner cartridge has to fill a new image drum.1. Switch off the printer and open the top cover.WARNING!Take extreme care when handling toner.> Toner can be harmful if inhaled, swallowed or if itgets in the eyes.> Toner can also stain hands and clothing.