Black or colored toner spots on printouts also indicates a failing drum unit. The drum unit may need replacing if you notice the printer producing blurry, low-quality images. How do I know if my printer drum needs replacing? Other signs of a bad printer drum include printing blank pages, printing gray pages and strange sounds coming from the printer as it prints. The most obvious is most common on laser color printers and can be detected by a flashing message on the printer display screen. Under ideal conditions, the average drum life is estimated at approximately 12,000 pages. There are many factors that determine the actual drum life, such as the temperature, humidity, type of paper, type of toner used, number of pages per print job and so on. How long should a drum last on a Brother printer? Only when you replace the drum unit with a new one, you need to reset the drum counter. Once all 4 LEDs are lit, release the button.
Press and hold down the white button (shown as blue in the image below) for about 4 seconds until all the LEDs light up. How do I reset my brother hl 2140 drum unit? Open the front cover and the back cover (face-up output tray).Make sure the machine is in the Ready mode.How do you clean the drum on a Brother HL 2270dw printer?