User Manual

Routine maintenance
71
A
j Close the front cover of the machine.
Note
After you replace a toner cartridge, DO
NOT turn off the machine's power switch
or open the front cover until the LCD
clears the Please Wait message and
returns to Ready mode.
Replacing the drum unit A
Model name: DR-3355
A new drum unit can print approximately
30,000 A4 or Letter size single-sided pages.
Important
For best performance, use a Brother
Original drum unit and Brother Original
toner units. Printing with a third-party drum
unit or toner unit may reduce not only the
print quality but also the quality and life of
the machine itself. Warranty coverage
may not apply to problems caused by the
use of a third-party drum or toner unit.
Drum Error A
The corona wire has become dirty. Clean the
corona wire in the drum unit. (See Cleaning
the corona wire uu page 79.)
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 Unit
A
The drum unit has exceeded its rated life.
Please replace the drum unit with a new one.
We recommend a Brother Original 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 75.)
Drum Stop A
We cannot guarantee the print quality. Please
replace the drum unit with a new one. We
recommend a Brother Original 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 75.)