HL-1850/1870N SERVICE MANUAL
5-3
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.
<Replacement Procedure>
(1) Press the cover release button and then
open the front cover.
(2) Pull out the drum unit assembly.
(Fig.5-4)
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)
Fig. 5-5
(5) Remove the protective cover. (Fig.5-6)
Fig. 5-6
(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. 5-7
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