Brother MFC-8440 B - Manual (Page 188)

12 - 27 TROUBLESHOOTING AND ROUTINE MAINTENANCE
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 (
▼).
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 12-34.)
4
Close the front cover.
5
Plug in the power cord first, then the telephone cord.
Corona Wire
Tab
Home Position(
▼)