HP Color 9850mfp Service Manual - Page 336

II UNIT EXPLANATION CONVEYANCE Q5686A/Q5687A B. Shift control In the sort/group mode, the shift motor (M702) turns on a specified period of time after the finisher entrance sensor (PS704) detects the trailing edge of paper. M702 rotates to start to shift the shift moving section. The shift roller rotates by driving the finisher conveyance motor (M701), and it shifts while conveying paper. When the shift HP sensor (PS718) turns on from off and it is detected that the shift has been completed, M702 stops. A specified period of time after it stops, M702 turns on again and stops at the position where PS718 turned off from on. This operation returns the shift moving section to its original position to stand by for the next page to be shifted. Paper is offset one at a time by repeating a series of this operation. Finisher entrance sensor (PS704) Finisher conveyance 670mm/s motor (M701) 400mm/s Shift motor (M702) Shift HP sensor (PS718) [1] Start of shifting [2] Completion of shifting [1] [2] [3] [4] [3] Start of movement to HP [4] Position of HP 1.2.5 Paper exit roller control The paper exit roller motor (M707) controls the main tray paper exit roller and the paper exit belt of the stacker by controlling the finisher control board (Finisher CB). A. Straight/sort/group modes When the finisher entrance sensor (PS704) detects the leading edge of paper, the paper exit roller motor (M707) rotates at high speed. And a specified period of time after PS704 detects its trailing edge, the rotation changes to a low speed for paper exit. To convey the next paper, the rotation changes again to a high speed a specified period of time after the main tray paper exit sensor (PS706) detects the trailing edge of paper. A specified period of time after PS706 detects the last paper, M707 stops. Finisher entrance sensor (PS704) Paper exit roller motor (M707) 400mm/s 253mm/s Main tray paper exit sensor (PS706) [1] Start of paper exit [1] [2] [2] Preparation for the next paper conveyance 2-6