94 _Maintenance4. Lift the locking lever and pull the toner cartridge out.5. Remove the new toner cartridge from its bag.6. Thoroughly roll the cartridge five or six times to distribute the tonerevenly inside the cartridge.7. Hold the toner cartridge by the handle and slowly insert the cartridge intothe opening in the machine.8. Slide the new toner cartridge in until it locks in place.9. Turn the cartridge locking lever toward the left until you hear a 'click'.10. Close the front cover, then the side cover.MAINTAINING THE IMAGING UNITExpected cartridge lifeThe useful life of the imaging unit is approximately 80,000 pages. Thescreen displays Imaging unit is worn. Replace with new one when the lifeof the imaging unit is almost ended. Approximately 6,000 more pages canbe made after the warning message related to the imaging unit, but youshould have a replacement imaging unit in stock. Imaging unit yield may beaffected by the operating environment, optional, printing interval, media typeand media size.• Imaging unit is worn. Replace with new one appears on the display.For ordering information for imaging unit. (See "Supplies" on page 118.)Replacing the imaging unit1. Open the side cover.If toner gets on your clothing, wipe it off with a dry cloth and washclothing in cold water. Hot water sets toner into fabric.After replacing the toner cartridge, wait for several minutes withoutpowering off until the machine enters to standby mode. Otherwise itmay cause malfunction of the machine.To prevent damage to the imaging unit, do not expose it to light formore than a few minutes.
