Why do printers need drums?
Why do I need a drum? Without a drum unit, the toner powder in the cartridge cannot be transferred onto the page. The two parts work together to create a print! You can’t have one without the other and expect the printer to work properly.
What does a drum cartridge do?
In short, the toner cartridge is a container that contains the toner powder, whereas the drum unit is an electrically charged cylinder that transfers the powder onto paper.