Brother International HL 1850 Service Manual - Page 165

CHAPTER 5 PERIODIC MAINTENANCE (7) Clean the primary corona wire inside the drum unit by gently sliding the blue tab from right to left several times. Return the tab to the home position (A mark position) before you re-install the drum unit assembly. Home position 0 .4 (------' Fig. 5-8 (8) Re-install the drum unit assembly into the printer. Close the front cover. 0 CAUTION: • Handle the drum unit and toner cartridge carefully. If toner scatters on your hands or clothes, wipe or wash it off with cold water immediately. • Be sure to seal the toner cartridge tightly so that toner powder does not spill out of the cartridge. • Dispose of the used toner cartridge in accordance with localplastic waste regulations. • Only unpack a toner cartridge immediately before you need to install it into the printer. If a toner cartridge is left unpacked for a longperiod of time, the toner life is shortened • If an unpacked drum unit is subjected to excessive direct sunlight or room light, the unit may be damaged. • Use a Brother genuine toner cartridge which is specially formulated to ensure top print quality. • Printing with a 3rdparty toner or toner cartridge may reduce not only the printing quality but also the quality and life of the printer itself. It may also cause serious damage to the performance and life of a genuine Brother drum unit Warranty cover is not applied to problems caused by the use of3rdparty toner or toner cartridges. • Make sure that the wire cleaner on the drum unit is returned to the home position (1 mark position) before re-installing the drum unit into the printer, orprintedpages mayhave vertical stripes. (Refer to Fig. 5-8.) • Install the toner cartridge immediately after you remove the protective cover. Do not touch the development roller andphotosensitive drum coloredred as shown below; . Fig. 5-9 NOTE; It is recommended to clean the printer when you replace the toner cartridge. Refer to subsection 3. `PERIODICAL CLEANING' in this Chapter. 5-4