d Clean the corona wire inside the drum unit by gently sliding the green tab from left to right and right to left several times.

1

Note

Be sure to return the tab to the home position (a) (1). If you do not, printed pages may have a vertical stripe.

e Put the drum unit and toner cartridge assembly back into the machine.

f Close the front cover of the machine.

Routine maintenance

Replacing the drum unit

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

The corona wire has become dirty. Clean the corona wire in the drum unit. (See Cleaning A the corona wire uu page 73.)

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.

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