I just replaced the toner cartridge and the LCD continues to display the message "Toner Life End" or "Replace Toner".

What is the difference between the toner cartridge and the drum unit?

Replace Fuser

Replace PF Kit xx

I print mainly black and white documents. How can I stop the life of my color toner cartridges from decreasing when I print?

I still receive the error message "Replace Drums", "Replace Drum: X", "Drum End Soon", or "Drum End Soon: X" after I replace the drum unit with a new one.

Replace Belt unit

Replace WT (waste toner) Box

Replace Drum

Replace Toner