8.3 <Maintenance>Maintaining the print cartridgePrint cartridge storageTo get the most from the print cartridge, keep the following guidelinesin mind:• Do not remove the print cartridge from its package until ready foruse.• Do not refill the print cartridge. The printer warranty does not coverdamage caused by using a refilled cartridge.• Store print cartridge in the same environment as the printer.• To prevent damage to the print cartridge, do not expose it to light formore than a few minute.Expected cartridge lifeThe print cartridge yield depends on the amount of toner that print jobsrequire. Average yield for a new print cartridge is 7,000 or 14,000standard pages in accordance with the ISO/IEC 19752 standard.(Average yield for the original print cartridge supplied with the machineis 7,000 standard pages.) The actual number may also be differentdepending on the print density of the pages you print on, and the numberof pages may be affected by operating environment, printing interval,media type, and media size. If you print a lot of graphics, you may needto change the cartridge more often.Checking the remaining tonerYou can check the level of toner left in the cartridge.If you are having print quality problems, this can help you determine ifthe problem is caused by low toner.1 Press Menu until System Setup appears on the bottom line of thedisplay press OK.2 Press the Up/down arrow buttons until Maintenance appears andpress OK.3 Press the Up/down arrow buttons until Supplies Life appears andpress OK.4 Press the Up/down arrow buttons to access Toner Remains andpress OK.The display shows the percentage of the remaining toner.NoteWhile the following messages are appearing on the display, thesub-menu(s) under Supplies Life can be changed:- Invalid Toner, NonGenuine Toner, Replace Toner, TonerExhaustedRedistributing print cartridgeWhen the print cartridge is near the end of its life:• White streaks or light printing occurs.• Toner Low appears on the display.• The Status LED blinks red.If this happens, you can temporarily reestablish print quality byredistributing the remaining toner in the cartridge. In some cases, whitestreaks or light printing will still occur even after you have redistributedthe toner.1 Open the top cover.2 Pull the print cartridge out.Cautions• Avoid reaching too far into the printer. The fusing area maybe hot.• To prevent damage to the print cartridge, do not expose itto light for more than a few minutes. Cover it with a piece ofpaper, if necessary.• Do not touch the green surface undersid e of the printcartridge. Use the handle on the cartridge to avoid touchingthis area.