[Product Focus] Xerox WC-5845/5855 Developer

Generally, it is recommended to replace the developer unit every 100,000 to 150,000 pages, or every three to four years, whichever comes first. Additionally, it's important to monitor the print quality of your copier regularly. If you notice a decline in print quality, such as faint or uneven prints, it may be time to replace the developer unit, even if it hasn't reached the recommended replacement interval yet.