PROCESS UNIT hp Color 9850mfp 4.16 Replacing the developer A. Periodically replaced parts/cycle • Developer: Every 100,000 copies B. Procedure 1. Remove the developing unit. (See " 4.15 Replac- ing the developing unit .") 2. Put the developing unit [1] on end and rotate its upper end in drawing an arc to discharge devel- oper. After discharging the developer, repeat Steps 3 and 4 below to discharge all of the developer. III DIS./ASSEMBLY 3. Install the rotating jig [1] provided inside the toner supply unit to the coupling [2] on the agita- [1] [2] tor screw side and turn it in the arrow-marked direction. 3-50