Reset the drum counter only when you replace the drum unit. If you reset the drum counter during the life of the drum unit currently being used, the remaining drum life will not be displayed accurately.
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Make sure that the machine is turned on.
Press (Cancel) to interrupt the error.
Press (Settings)> All Settings > Machine Info. > Parts Life.
Touch the dial pad area to light up the LEDs.
Press and hold # until the LCD message changes.
Press Drum.
Press Yes.
Press (Home).
Brother strongly recommends that customers use only genuine Brother drum units and/or toner cartridges Each Brother laser printer is designed to work at pre-set temperatures that are matched exactly to each of our individual toner formulations. Each individual component is designed to work with the other to ensure quality and reliability. Using non-Brother supplies may affect the hardware performance, print quality and machine reliability. The Brother limited warranty does not apply to any problem that is caused by the use of unauthorized third party drum units, toner cartridges or toner.