Chapter 12 Maintenance 12-15MaintenanceReplacing a BJ TankThis section describes how to replace a BJ tank in an installed Colour BJ cartridge. Beforereplacing a BJ tank, be sure to read the sectionWhen to Replace a BJ Cartridge or BJ Tank.(→ p. 12-8)n• Do not leave empty BJ tanks in a Colour BJ cartridge. Remove them immediately when they runout of ink, and replace them with new ones. Do not leave a Colour BJ cartridge with either of itsBJ tanks missing as the ink in the BJ cartridge will dry and adversely affect print quality.• Do not replace BJ tanks while the unit is printing or performing another operation.Leave the Colour BJ cartridge installed in the unit and follow this procedure to replace a BJtank:1 Make sure the unit is plugged in.2 Open the document tray (MultiPASS modelsonly).3 Lift the document guides to open the printercover.• If the printer cover does not open easily, slide thedocument guides outwards and then open theprinter cover.Document guides4 Press C.