Brother HL 1240 - B/W Laser Printer Service Manual page 284

5.
Clean the primary corona wire inside the drum unit by gently sliding the tab to the
right hand end and left hand end several times.
Home Position ( )




6.
Return the tab to the home position (
unit assembly into the printer.
!
Caution
Be sure to position the tab at the home position, or printed pages may have vertical
stripes.




7.
Install the drum unit assembly into the printer.
See the section "How to replace the Drum unit" earlier in this Chapter.




8.
Close the front cover.




9.
Plug in the power cord and turn on the power switch.
Fig. 3-22 Cleaning the primary corona wire
3-18
mark position) before reinstalling the drum