How to Replace the toner cartridge (TN-350) Brother MFC-7420 ,MFC-7820N Printers

Replacing the toner cartridge (TN-350) Brother MFC-7420 ,MFC-7820N Printers

The toner cartridge can print up to 2,500 pages. When the toner cartridge is running low, the LCD shows Toner Low. Actual page count will vary depending on your average type of document (i.e., standard letter, detailed graphics).

Note
It is a good idea to keep a new toner cartridge ready for use when you see the Toner Low warning.

Discard the used toner cartridge according to local regulations, keeping it separate from domestic waste. Be sure to seal the toner cartridge tightly so toner powder does not spill out of the cartridge. If you have questions, call your local waste disposal
office.
We recommend that you clean the MFC and drum unit when you replace the toner cartridge.

How to replace the toner cartridge Brother MFC-7420 ,MFC-7820N Printers

WARNING
Just after you use the MFC, some internal parts of the machine will be
extremely HOT! Never touch the shaded parts shown in the illustration.

1 Open the front cover and pull out the drum unit and toner cartridge assembly.

CAUTION
To prevent damage to the MFC from static electricity, do not touch the electrodes shown below.

2 Hold down the lock lever on the left and pull the toner cartridge out of the drum unit.

CAUTION
■ Place the drum unit on a drop cloth or large piece of disposable paper to avoid spilling and scattering the toner.
■ Handle the toner cartridge carefully. If toner scatters on your hands or clothes, immediately wipe it off or wash it with cold water.

3 Unpack the new toner cartridge. Place the used toner cartridge into the aluminum bag and discard it according to local regulations.
4 Gently rock the toner cartridge from side to side five or six times to distribute the toner evenly inside the cartridge.

5 Remove the protective cover.

6 Insert the new toner cartridge in the drum unit until it clicks into place. If you put it in properly, the lock lever will lift automatically.

7 Clean the primary corona wire inside the drum unit by gently sliding the blue tab from right to left several times. Return the blue tab to the Home position (▼) before reinstalling the drum unit and toner cartridge assembly.

8 Install the drum unit and toner cartridge assembly in the MFC.
9 Close the front cover.