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Routine Maintenance
Replacing the drum unitBefore you replace the drum unit, see Before replacing the consumable items on page 67.
When you replace the drum unit with a new one, you need to reset the drum counter by completing the following steps:
a Make sure that the machine is turned on and the Drum LED is flashing. Leave the machine for at least 10 minutes to cool down.
b Open the front cover.
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c Take out the drum unit and toner cartridge assembly.
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