Periodical Cleaning; Cleaning The Machine Exterior; Cleaning The Scanner - Brother MFC8440D Service Manual

7/13/2019
CHAPTER 5 PERIODIC MAINTENANCE
3.

PERIODICAL CLEANING

Clean the following parts periodically to avoid any machine problems or print image defects.
! CAUTION:
While drum unit and scanner window cleaning basically can be implemented by the end user,
the electrical terminals inside the machine and on the drum unit should be cleaned by a service
technician. Instruct the users not to touch those terminals.
There are high v oltage electrod es inside the machine. Before cleaning the machin e,
m a k e s u r e t h a t t h e p o w e r s w i t c h h a s b e e n t u r n e d o f f a n d t h e p o w e r c o r d h a s b e e n
u n p l u g g e d f r o m t h e p o w e r o u t l e t.
3.1

Cleaning the Machine Exterior

Clean the machine exterior to keep the machine clean.
1) Turn off the power switch and unplug the power cord.
2) Wipe dirt and dust away from the machine exterior with a damp cloth and allow the
machine to dry completely before turning the power on again.
3) Plug in the power cord.
!
CAUTION:
•
Use water or neutral detergents for cleaning. Cleaning with volatile liquids such as thinner
or benzene will damage the surface of the machine.
Do not use cleaning materials that contain ammonia. They will damage the machine and
•
the toner cartridge.
3.2

Cleaning the Scanner

Turn the machine power switch off and lift the document cover. Clean the scanner glass and
glass strip with dry cloth and the white film with isopropyl alcohol on a lint free cloth.
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Brother 8840D Service Manual
WARNING
White film
Glass strip
Fig.5-36
5-20
Document cover
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