Replacing Consumable Items- 163 -Maintenance810 Lightly wipe the four LED heads (8) withsoft tissue paper.11 Close the top cover.12 Close the scanner unit.Memo If you dispose of a toner cartridge by necessity, put it in apolyethylene bag or something and then dispose of it inaccordance with your municipality's ordinances or guidelines.Replacing the Image Drum UnitLife Duration of Image Drum UnitWhen the [Image Drum Unit Near Life]message appears on the display screen, preparea replacement image drum unit.If you continue printing, the message [PleaseReplace the Image Drum Unit] will be displayedand printing will stop.A guideline for replacing the image drum unit isevery 20,000 pages or so for A4 sized paper(with single-sided printing). However, thisnumber of pages is for printing with generalconditions (3 pages at a time). Printing one pageat a time reduces the drum life by about half.The actual number of printed pages may behalved again relative to the above guideline,depending on the printing conditions.If you continue to print more than the above, themachine will force the printing to stop.Note The actual number of pages you can print with the imagedrum unit depends on how you use it. The above guidelinemay be reduced by more than half, depending on theconditions of printing.Note Though opening and closing the top cover may extend thelife of a image drum unit for a while, it is recommended toreplace it soon after the [Install New Image Drum Unit]is displayed. The print quality may deteriorate after the toner cartridgehas been unpacked for a year. Replace it with a new one. When the <SETTING> key > [Admin Setup] >[Management] > [System Setup] > [Status in NearLife] is set to [Disable], the [Image Drum Unit NearLife] message does not appear.Procedure for ReplacementNote The image drum (the green tube) is very delicate. Handleit carefully. Do not expose the image drum unit to direct sunlight orvery bright interior light (approximately more than1500lux). Even under the normal interior light, do notleave it for more than 5 minutes. In order for the machine to have its full performance,please use original Oki Data consumables. If you use consumables other than Oki Data original onesand a fault occurs, dealing with it will be charged for,regardless of whether it is in the free fault service period.(This is not for all faults occurring with non-original OkiData products, however, please bear this in mind whenusing them.) There is one toner cartridge for each color on the imagedrum.1 Prepare a replacement image drum unitand toner cartridges.2 Open the scanner unit.8