Oki Data CONFIDENTIAL43085101TH Rev.1 155 /6. PERIODICAL MAINTENANCE6.1 Recommended replacement partsOki Data recommends that heavy users only replace the following parts. (If those parts are notreplaced, the print quality is not guaranteed, and malfunctions may even result.)Part NameFriction Pad AssyRoller Assy. HoppingC61004208880143334901C5800/C5500<--<--Parts are replaced periodically by users.6.2 CleaningClean the interior and outside of the printer, as needed, using a waste cloth and small vacuumcleaner (hand cleaner).Note! Be careful not to touch the image drum terminals, LED lens array and LED head connectors.6.3 Cleaning of LED lens arrayIf a vertical white band or white stripe (partial print, light print) is observed in the print face, cleanthe LED lens array.Note! To clean the LED lens array, be sure to use the LED head cleaner.(The LED head cleaner is supplied in the same package of the toner cartridge.)White band, white stripe(Void or light printing)Note! 1. Consumable parts (Image drums, toner cartridge, fuser unit, belt unit) are not included.2. Power supply, PU PCB, CU PCB and other PCBs are not included.