HP Color 9850mfp Service Manual - Page 345
Operation, Alignment HP sensor U PS708
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II UNIT EXPLANATION Q5686A/Q5687A Symbol M705 M713 M716 M718 M722 SD702 PS705 PS708 PS709 PS720 PS723 PS724 Name Alignment motor U Stacker entrance motor Alignment motor L Stopper motor Stacking assist motor Stacking assist solenoid Stacker entrance sensor Alignment HP sensor U Paper exit belt HP sensor Stacker no paper sensor Stopper HP sensor Alignment HP sensor L Function and method Driving of the alignment plate U Stepping motor Driving of the stacker entrance roller Stepping motor Driving of the alignment plate L Stepping motor Driving of the booklet stopper Stepping motor Driving of the stacking assist roller DC motor Pressing/releasing of the stacking assist roller Paper detection at the stacker entrance HP detection of the alignment plate U HP detection of the paper exit belt Detection of the presence of paper in the stacker HP detection of the booklet stopper HP detection of the alignment plate L STACKER 3.2 Operation 3.2.1 Alignment U control In the staple, folding, stitch-and-fold, and three-folding modes, the alignment along the width of paper conveyed to the stacker is made by rotating the alignment motor U (M705) in normal or reverse direction to open or close the alignment plate U. The alignment HP sensor U (PS708) detects the home position of the alignment plate U. A. Alignment /U control An finisher operation signal from the finisher starts to rotate the alignment motor U (M705) in the direction in which the alignment plate U closes and stops at the stand-by position in which the alignment plate is open a little wider then the paper width. A specified period of time after the stacker entrance sensor (PS705) detects the trailing edge of paper, M705 rotates in the normal or reverse direction to oscillate the alignment plate U for proper alignment of paper. Alignment is made each time a sheet of paper is sent in. Stacker entrance sensor (PS705) Alignment HP sensor U (PS708) Alignment motor U OPEN (M705) CLOSE [1][2] [1] Finisher operation start signal ON [2] Standing by for paper size [3] [3] Alignment operation 2-15