HL-5240/5250DN/5270DN/5280DW SERVICE MANUAL
Confidential
3-49
3. PERIODICAL CLEANING
Clean the outside and inside of the printer regularly with a dry soft cloth. When you replace the
toner cartridge or the drum unit, make sure you clean the inside of the printer. If printed pages
are stained with toner, clean the inside of the printer with a dry soft cloth.
!
CAUTION:
While drum/toner ASSY and scanner window cleaning can be implemented by the end user,
the electrical terminals inside the printer and on the drum/toner ASSY should be cleaned by
a service technician. Instruct the users not to touch those terminals.
WARNING
There are high voltage electrodes inside the printer. Before cleaning the printer, make
sure that the power switch has been turned off and the power cord has been unplugged
from the power outlet.
3.1 Cleaning the Inside of the Printer
(1) Turn off the printer power switch and then unplug the printer.
Fig. 3-85
(2) Press the front cover release button and then open the front cover.
Fig. 3-86
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