Replacing The Drum Unit - Brother MFC-4550 Operation Manual

MFC 4550/6550MC/7550MC
OP-US-5.0
REPLACING TONER CARTRIDGE AND DRUM UNIT

Replacing the Drum Unit

The machine uses a drum unit to create the print images on paper. If the display
shows CHANGE DRUM, it indicates the drum unit is nearly at the end of its life. We
recommend you prepare a new drum unit to replace the current one. Even if the
display shows CHANGE DRUM, you may be able to continue to print without
replacing the drum unit for a while. If there is a noticeable deterioration in the output
print quality even before CHANGE DRUM is shown, then the drum unit should be
replaced.
• When removing the drum unit, handle carefully because it contains
toner.
• You should clean the machine when you replace the drum unit. See page
14-1~3.
NOTE: The drum unit is a consumable, and it is necessary to replace it periodically.
The drum unit is rated at approximately 20,000 pages. There are many
factors that determine the actual drum life, such as temperature, humidity,
type of paper and toner that you use and the number of pages per print job,
etc... The drum life is estimated at approximately 20,000 pages at 20 page per
job and 8,000 pages at 1 page per job. The actual number of pages your drum
will print may be significantly less than these estimates. Because we have no
control over the many factors that determine the actual drum life, we can not
guarantee a minimum number of pages that will be printed by your drum.
For best performance, use only genuine toner, and the product should be used
only in a clean, dust-free environment with adequate ventilation.
Follow these steps to replace the drum unit:
1 ) Turn off the power switch or unplug the power cord.
2 ) Open the top cover.
3 )
WARNING
Top cover
Drum unit
3 ) Remove the old drum unit. (See
page 13-2.)
WARNING
Just after you have used the
machine, some internal parts of
the machine are extremely HOT!
So please be careful. (See page
14-2.)
13-5