Brother HL-1020 Service Manual page 266

USER'S GUIDE
Home Position ( )
5-14
6. Clean the primary corona wire inside the drum unit by gently sliding
the tab to the right and left several times.
Fig. 5-23 Cleaning the Primary Corona Wire
7. Return the tab to the home position (
reinstalling the drum unit.
!
Caution
Be sure to position the tab at the home position, or printed pages may
have vertical stripes.
8. Install the drum unit into the printer.
See the section "REPLACING THE DRUM UNIT" in Chapter
9. Close the top cover.
10. Plug in the power cord and turn on the power switch.
mark position) before
5.