PROCESS UNIT hp Color 9850mfp 4.15 unit Replacing the developing A. Periodically replaced parts/cycle • Developing unit: Every 600,000 copies B. Procedure Note: • Be careful not to fold the Teflon sheet posted at the developing sleeve side of the develop- ing unit upper cover. • When cleaning the developing unit, be sure to use Hydro-Wipe which is specified as a CE tool. Using paper or cloth other than Hydro- Wipe will cause the developing regulation plate in the developing unit to be stuck with III DIS./ASSEMBLY dust and lint of the paper or cloth, thus result- ing in white streaks on the images.
• The developing units are provided for the four colors of yellow, magenta, cyan and black, and they are all common. However, be sure to avoid reusing a developing unit that was once used for a different color since it has been stuck with the toner of that color. 1. Open the toner supply section. (See " 5.1 Open- ing and closing the toner supply section .") [2] [3] 2. Remove 2 screws [1] and then remove 4 devel- supply unit [2]. oping support legs [3] provided inside the toner Note:
• When placing the developing unit by itself, be sure to set the developing support legs to the body of the developing unit as a seat to pre- [3] [1] vent the toner bristles section from getting in touch with other sections. 3. Pull out the process unit. (See " 4.4 Pulling out the process unit .") 3-48