853. Wipe the surface of the scanner glass and DADF glass until it is cleanand dry.4. Wipe the underside of the scanner lid and white sheet until it is cleanand dry.5. Close the scanner lid.MAINTAINING THE TONER CARTRIDGEToner cartridge storageToner cartridges contain components that are sensitive to light,temperature, and humidity. Samsung suggests users follow therecommendations to ensure the optimum performance, highest quality, andlongest life from your new Samsung toner cartridge.Store this cartridge in the same environment as the printer it will be used in;this should be in controlled office temperature and humidity conditions. Thetoner cartridge should remain in its original, unopened package untilinstallation – If original packaging is not available, cover the top opening ofthe cartridge with paper and store in a dark cabinet.Opening the cartridge package prior to use dramatically shortens its usefulshelf and operating life. Do not store on the floor. If the toner cartridge isremoved from the printer, always store the cartridge:• Inside the protective bag from the original package• Correct side up in a horizontal position (not standing on end)• Do not store consumables in;- Temperature greater than 40°C (104°F).- Humidity range less than 20% and not greater than 80%.- An environment with extreme changes in humidity or temperature.- Direct sunlight or room light.- Dusty places.- A car for a long period of time.- An environment where corrosive gases are present.- An environment with salty air.Handling instructions• Do not touch the surface of the photosensitive drum in the cartridge.• Do not expose the cartridge to unnecessary vibrations or shock.• Never manually rotate the drum, especially in the reverse direction; thiscan cause internal damage and toner spillage.Use of non-Samsung and refilled toner cartridgeSamsung Electronics does not recommend or approve the use of non-Samsung brand toner cartridges in your printer including generic, storebrand, refilled, or remanufactured toner cartridges.Estimated cartridge lifeEstimated cartridge life (the life of the toner cartridge yield) depends on theamount of toner that print jobs require. The actual print-out number mayvary depending on the print density of the pages you print on, operatingenvironment, printing interval, media type, and/or media size. For example,if you print a lot of graphics, the consumption of the toner is high and youmay need to change the cartridge more often.Replacing the toner cartridgeWhen the toner cartridge is completely empty:• End of life, Replace with new toner cartridge appears on the display.• The machine stops printing. Incoming faxes are saved in memry.At this stage, the toner cartridge needs to be replaced.Check the type of thetoner cartridge for your machine. (See "Supplies" on page 112.)1. Open the side cover.2. Open the front cover.1 white sheet2 DADF glass3 scanner lid4 scanner glass• Samsung’s printer warranty does not cover damage to themachine caused by the use of a refilled, remanufactured, or non-Samsung brand toner cartridge.