Brother International HL 1850 Service Manual - Page 164

HL-1850/1870N SERVICE MANUAL NOTE: There are many factors that determine the actual toner life, such as temperature, humidity, type of paper that you use, the number of pages per print job, etc. (1) Press the cover release button and then open the front cover. (2) Pull out the drum unit assembly. (Fig.5-4) --„, N 1 Fig. 5-4 • CAUTION: It is recommended to place the drum unit assembly on a piece of disposable paper or cloth in case you accidentally spill or scatter toner. (3) Press the lock lever down, and then pull the toner cartridge out of the drum unit assembly. (4) Unpack the new toner cartridge. Keeping the cartridge horizontal, gently rock it from side to side five or six times. (Fig.5-5) (5) Remove the protective cover. (Fig.5-6) Fig. 5-5 (6) Install the new toner cartridge into the drum unit until you hear it lock into place. when the toner cartridge is installed correctly, the lock lever is lifted automatically. (Fig.5-7) Fig. 5-6 (r Fig. 5-7 5-3