Cleaning The Drum Unit - Brother MFC-8420 User Manual

3
Gently clean the scanner window by wiping it with a clean soft
dry cloth. Do not use isoproply alcohol.

Cleaning the drum unit

We recommend placing the drum unit and toner cartridge assembly
on a cloth or large disposable paper to avoid spilling and scattering
toner.
1
Clean the primary corona wire inside the drum unit by gently
sliding the blue tab from right to left several times.
2
Return the blue tab and snap it into the Home position ( ).
Home Position( )
Caution
If the blue tab is not at Home position ( ), printed pages may have
vertical stripes.
3
Reinstall the drum unit and toner cartridge assembly into the
MFC. (See Replacing the drum unit on page 22-32.)
4
Close the front cover.
5
Plug in the power cord first, then the telephone cord.
TROUBLESHOOTING AND ROUTINE MAINTENANCE 22 - 26
Scanner Window
Tab
Corona Wire