The laser printer puts the toner on the roller called “The photosensitive drum” inside the drum unit, and then prints letters and images by fixing toner to the paper by heat and pressure. To keep good print quality, the Brother machine detects the quality deterioration of the drum unit automatically
An imaging drum is an essential part in the operation of your modern laser printer. Along with the toner and roller, the imaging drum helps finalize the ink-to-paper process, receiving the image or text and then transferring it to paper. Otherwise known as a drum unit or photoreceptor assembly, it works much like the corresponding part in your office’s photocopiers.