hp Color 9850mfp DRIVE SYSTEM DIAGRAM 4 .3 Developing drive [1] [7] I OUTLINE [6] [5] [4] [3] [2] [1] Toner collection screw [5] Toner conveyance screw [2] Toner agitator screw [6] Developing coupling 1 [3] [7] Developing sleeve Developing coupling 2 [4] Developing motor Y, M, C, K (M20, M21, M22, M23) 1- 27