HP Color 9850mfp Service Manual - Page 332

II UNIT EXPLANATION CONVEYANCE Q5686A/Q5687A Symbol [10] [11] [12] [13] M701 Name Main tray paper exit roller Paper exit opening unit Sub-tray paper exit roller Sub-tray conveyance roller Finisher conveyance motor M702 Shift motor M707 Paper exit roller motor M708 Paper exit opening motor M712 Gate drive motor M721 Sub-tray paper exit motor SD704 SD705 PS701 PS704 PS706 PS712 PS716 PS718 Paper exit opening solenoid By-pass gate solenoid Sub-tray paper exit sensor Finisher entrance sensor Main tray paper exit sensor Paper exit opening HP sensor Gate HP sensor Shift HP sensor Function and method Paper exit to the main tray Space saving when stacking large size paper; Crank mechanism Paper exit to the sub-tray Paper conveyance to the sub-tary Conveyance belt drive Stepping motor Driving of the shift roller in the cross direction DC motor Paper exit roller; Driving of the stacker paper exit belt Brushless DC motor Open/close drive of the paper exit opening unit DC motor Driving of the gate U and gate L Stepping motor Paper conveyance drive to the sub-tray Stepping motor Paper nip at the paper exit opening Drive to switch the by-pass gate Detection of the paper passage to the sub-tray Paper detection at the finisher entrance Detection of the paper passage to the main tray Detection of the paper exit opening unit HP Detection of the gate cam HP Detection of the shift unit HP 1.2 Operation 1.2.1 Finisher conveyance control The finisher conveyance is made by a 24VDC motor by controlling the finisher control board (Finisher CB). A. Interlock control The finisher conveyance drive control of paper is commenced by the start button ON signal from the finisher. However, when the interlock (MS701) is off, an error message is output to the finisher PRCB with no control commenced. B. Finisher conveyance control In the mode in which a high speed rotation is made by turning on the start button and paper is exited at low speed from the finisher, turn on the finisher paper exit sensor (PS13) to switch conveyance to a low speed, and then to a high speed a specified period of time after the finisher entrance sensor (PS704) is turned ON. For main tray paper exit, conveyance is switched to a medium speed a specified period of time after PS704 detects the trailing edge of paper, and then maintained at the finisher paper exit line speed. And the conveyance returns to a high speed rotation after a specified period of time to stand by for the next conveyance of paper. 2-2