This error message appears on your Macintosh as soon as the north unit is close to the end of that life. The north unit will must be replaced to clear the error.

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1. Make sure that your Brother maker is turn on.

2. Open the former cover and also remove the drum unit and also toner cartridge assembly from the machine.

us recommend placing the drum unit and also toner cartridge assembly on a item of disposable file in instance you accidentally pour out or scatter toner.

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3. Press down on the green lock lever and also take the toner cartridge out of the drum unit.

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4. Unpack the new drum unit.

5. Put the toner cartridge firmly into the brand-new drum unit until you hear it lock right into place.

Make sure you put the toner cartridge in appropriately or it may separate native the north unit.

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6. Clean the corona wire within the north unit by gently sliding the environment-friendly tab from left come right and right come left number of times.

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Be certain to return the tab to the house position (▲). The arrowhead on the tab should be aligned v the arrow on the drum unit. If it is not, printed pages may have actually a vertical stripe.

7. Install the north unit and toner cartridge assembly earlier into the machine.

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8. Close the prior cover the the machine.

9. Reset the north counter:

when you replace the drum unit with a new one, you have to reset the north counter.

a. Push

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(Cancel) top top the Touchpanel.

b. Push

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(Settings) ~ above the Touchscreen.

c. Push All Settings.

d. Press an equipment Info.

e. Press components Life.

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f. Press and also hold # (pound) on the Touchpanel till the message on the display changes.