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Brother HL-2240D TN-420/TN-450 Toner Installation Instructions

Originally written for: Brother HL-2240D
Also applies to: Brother HL-2220, 2230, 2240, 2270DW, 2280DW, MFC-7360N, 7460DN, 7860DW
  • Date:

These instructions explain toner installation procedures for a Brother TN420/TN450 toner cartridge.

To order your replacement cartridge for this printer refer to the following part number: N5480 (OEM # TN-450, TN-420)

The original toner cartridge that was included with this machine may either be a starter, standard, or a high yield cartridge.   When the toner becomes low, the TONER LED indicator light will flash continuously until replaced.  Once the toner cartridge is empty, the printer will enter a “REPLACE TONER” mode that ceases print functionality until the toner cartridge is replaced.   A new and unused toner cartridge will reset the “REPLACE TONER” mode.

Brother HL2230, HL2240, HL2270, HL2280, MFC7360, MFC7460, MFC7860 print cartridge

Before You Begin
Before you begin please take time to perform the following steps to ensure that the new print cartridge is properly detected by your Brother printer:

  1. Check to ensure that the dial on the left side of the cartridge is in the position as illustrated in the image below.   If not, turn the dial counter clockwise until it matches the position in the image.   

    Proper position of dial for Brother TN-420/TN-450 cartridge

  2. Check to make sure that the printer is powered up during the entire process.   Changing the cartridge with the printer powered off will not reset the “REPLACE TONER” mode.  In the event that the printer is powered off when the cartridge is installed, you will need to remove the cartridge and repeat step one before reinstalling the cartridge.
  3. In the event that your machine will not reset out of the “REPLACE TONER” mode, click here for instructions on how to reset the “REPLACE TONER” mode manually.

Replacing the Toner Cartridge

  1. Make sure that the machine is powered up.
  2. Open the front cover of the machine.

    Opening the front cover of Brother HL-2240 printer

  3. Remove both the drum unit and toner cartridge assembly.

    Removing Brother TN-420 drum unit and cartridge assembly.

  4. Push down the green lock lever and take the toner cartridge out of the drum unit.

    Removing Brother TN-450 cartridge from drum unit

  5. Unpack the new toner cartridge. Hold the cartridge level with both hands and gently shake it from side to side several times in order to distribute the toner evenly inside of the cartridge.

    Gently shaking toner cartridge for Brother HL-2220, HL-2230, HL-2240, HL-2270, HL-2280

  6. Pull off the protective cover.

    Removing protective cover from toner cartridge for Brother MFC-7360, MFC-7460, MFC-7860

    Note: Before installing this cartridge, please check to ensure that the dial on the left side of the new cartridge is positioned identical to the image below. If not, turn the dial counter-clockwise until it matches the dial position in the image. It is imperative that this dial be locked into position as illustrated to ensure that the printer detects that a new cartridge has been installed and resets the “REPLACE TONER” mode.
    Proper position of dial for Brother TN420/TN450 cartridge

  8. Put the new toner cartridge firmly into the drum unit you hear and feel it lock into place. If installed successfully, the green lock lever will lift automatically.

    Installing new toner cartridge in drum for Brother HL2220, HL2230, HL2240, HL2270, HL2280

  9. Clean the primary corona wire inside of the drum unit by gently sliding the green tab from right to left and left to right several times.
    Cleaning corona wire in drum unit for Brother MFC7360, MFC7460, MFC7860

    Note: Be sure to return the tab to the home position (^) (1). If you do not, printed pages may contain a vertical stripe.
  10. Reinstall the drum unit and toner cartridge assembly back into the machine. Close the front cover.

    Reinstallation of drum unit and Brother TN-420/TN-450 cartridge assembly

      Note: Do NOT turn off the machine’s power switch or open the front cover until the “Ready” LED has illuminated.
  • Publisher: Precision Roller