Brother TN450 & TN420 Toner Reset Instruction - My Cartridge Store

For Brother DCP/MFC Series:

1. First, Open the front cover of the toner/drum section of the printer.
2. Press the Clear/Back button and the following message should appear on the LCD display "Replace Drum? 1. Yes, 2. No"
3. Reset the counter in the following procedure by printer model and toner type.
   MFC models with numeric keypads
   TN420 standard toner: Press the *, 1 and 1 button in this order
   TN450 high yield toner: Press the *, 1 and 2 buttons in this order
   Unknown Toner Type: Press the *, 0 and 0 buttons in this order
   
   DCP models with numeric keypads
   TN420 standard toner: Press the "Start" button, and press "arrow up" or "arrow down" button to display "11" on the LCD display. Then press the "OK" button.
   TN450 high yield toner: Press the "Start" button, and press "arrow up" or "arrow down" button to display "12" on the LCD display. Then press the "OK" button.
   Unknown Toner Type: Press the "Start" button, and press "arrow up" or "arrow down" button to display "00" on the LCD display. Then press the "OK" button. The message "Accepted" should appear on the LCD display.
4. Following, wait 2 seconds, "Cover Open" will appear on the LCD display.
5. Eventually, Close the front cover.

For Brother HL Series:

1. Turn the power of the printer off.
2. Open the front cover of the toner/drum section of the printer.
3. Press and hold the "Go" button while turning on power to the printer.
4. Release the "Go" button after "Toner, Drum, and Error" LEDs turn on with the "Ready" LED turn off. All LEDs will now be OFF.
5. Press the "Go" button 2 times - The "Toner, Drum, and Error" LEDs will turn ON.
6. Press the "Go" button 6 times for a TN420 or Press the "Go" button 7 times for Brother TN450.
7. Close the front cover after "Error" LED starts to flash.
8. Finally, The reset procedure has been completed.