hp Color 9850mfp REGISTRATION/ADU/REVERSE/PAPER EXIT B. ADU pre-registration operation II UNIT EXPLANATION [1] START button (ON) [3] 2nd paper: ADU pre-registration loop [2] 1st paper: ADU pre-registration loop 2-61 [1] Paper feed motor (M41) Registration roller motor (M30) ADU pre-registration clutch (MC3) ADU conveyance clutch /2 (MC1) Registration sensor (PS22) ADU conveyance sensor (PS20) ADU pre-registration sensor (PS23) V TOP [2] [3]