HL-5240/5250DN/5270DN/5280DW SERVICE MANUAL
Confidential
3-53
!
CAUTION:
* We recommend that you put the drum unit and toner cartridge assembly on a piece of
disposable paper or cloth in case you accidentally spill or scatter toner.
* To prevent damage to the printer from static electricity, DO NOT touch the electrodes shown
in the illustration.
(3) Clean the primary corona wire inside the drum unit by gently sliding the blue tab from right
to left and left to right several times.
Fig. 3-91
!
CAUTION:
Be sure to return the tab to the home position. If you do not, printed pages may have a
vertical stripe.
(4) Put the drum unit and toner cartridge assembly back in the printer. Close the front cover.
Fig. 3-92
Home position
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