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Replacing the drum unit A
Order No. DR-720
A new drum unit can print approximately
30,000 Letter or A4 size single-sided pages.
• 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 A
Drum Error
Open the...
The corona wire has become dirty. Clean the
corona wire in the drum unit. (See Cleaning
the corona wire uu page 74.)
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.
Replace Parts
Drum A
Replace Parts
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. (See Resetting the drum
counter uu page 80.)
Drum Stop A
Drum Stop
Replace the...
We cannot guarantee the print quality. 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. (See Resetting the drum
counter uu page 80.)
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