d Put the drum unit and toner cartridge assembly back into the machine. Close the front cover.

Replacing the drum unit

Order No. DR-420

A new drum unit can print approximately 12,000 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 12,000 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

Drum Error

The corona wire has become dirty. Clean the corona wire in the drum unit. (See Cleaning the corona wire uu page 60.)

If you cleaned the corona wire and Drum Error was not cleared, replace the drum unit with a new one.

Replace Drum

Replace Drum

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.

Drum Stop

Drum Stop

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.

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