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Replacing the drum unit 5
Order No. DR-720
A new drum unit can print approximately 30,000 Letter or A4 size single-sided pages.
Note
• There are many factors that determine the actual drum life, such as the temperature, humidity, type of
paper, type of toner used and so on. Under ideal conditions, the average drum life is estimated at
approximately 30,000 pages. The actual number of pages that your drum will print may be significantly
less than this estimate. Because we have no control over the many factors that determine the actual drum
life, we cannot guarantee a minimum number of pages that will be printed by your drum.
• For best performance, use only genuine Brother toner. The machine should be used only in a clean,
dust-free environment with adequate ventilation.
• Printing with a non-Brother drum unit may reduce not only the print quality but also the quality and life of
the machine itself. Warranty coverage does not apply to problems caused by the use of a non-Brother
drum unit.
Drum Error 5
Drum Error
The corona wire has become dirty. Clean the corona wire in the drum unit. (See Cleaning the corona wire
uu page 118.)
If you cleaned the corona wire and Drum Error was not cleared then the drum unit is at the end of its life.
Replace the drum unit with a new one.
Drum End Soon 5
Drum End Soon
The drum unit is nearing the end of its rated life and will require replacement. We recommend you keep a
genuine Brother drum unit ready for installation.
Clean the corona wire in the drum unit. If you don’t, printed pages may have a vertical stripe or Drum Error
may occur. (See Cleaning the corona wire uu page 118.)
Replace Drum 5
Replace Drum
The drum unit has exceeded its rated life. Please replace the drum unit with a new one. We recommend a
genuine Brother drum unit be installed at this time.
After replacement, reset the drum counter by following the instructions included with the new drum unit.