12-6 Maintenance Chapter 12Replacing the FX3 cartridgeThe only component of your machine you will need to replace is the FX3 cartridge.Although Canon manufactures many different cartridges, the FX3 cartridge is the onlyone designed for use with your machine. To purchase this cartridge, contact the CanonCustomer Care Center.When CHANGE CARTRIDGE appears in the LCD, you may need to replace thecartridge. However, it may also indicate that the toner inside the cartridge is simplyunevenly distributed. Before replacing the cartridge, follow this procedure to distributethe toner evenly:1 Remove the cartridge from themachine (1 steps 1 to 4, below).2 Gently rock the cartridge fromside to side a few times to distributethe toner evenly inside it.• Poor print quality may result if the toneris unequally distributed.3 Reinsert the cartridge into themachine (1 steps 8 and 9, p. 12-8).If after following the procedure above, CHANGE CARTRIDGE remains in the LCD orprint quality does not improve, follow this procedure to replace the cartridge:1 Remove any documents and printouts from the machine.2 Make sure the machine is plugged in.3 Lift the latch and open the front cover.c Do not try to open the front coverwithout lifting the latch since thismay damage your machine.