Canon Finisher-AB1 Service Manual page 238

Contents
3.1 Basic Construction ............................................................................................ 3-1
3.1.1 Overview...................................................................................................................... 3-1
3.2 Electrical Control Unit ....................................................................................... 3-2
3.2.1 Overview...................................................................................................................... 3-2
3.2.2 Finisher Controller PCB ............................................................................................ 3-3
3.2.3 Saddle Stitcher Controller PCB ............................................................................... 3-4
3.3 Stacking Unit...................................................................................................... 3-5
3.3.1 Overview...................................................................................................................... 3-5
3.3.2 Tray Ascent/Descent Control ................................................................................... 3-6
3.3.3 Auxiliary Tray Lift Control.......................................................................................... 3-7
3.3.4 Tray Paper Surface Detection.................................................................................. 3-8
3.4 Feeding Unit....................................................................................................... 3-9
3.4.1 Overview...................................................................................................................... 3-9
3.4.2 Basic Sequence of Operations .............................................................................. 3-12
3.4.3 Horizontal Registration Detection.......................................................................... 3-13
3.4.4 Horizontal Registration Correction/Alignment Operation................................... 3-15
3.4.5 Buffer Operation ....................................................................................................... 3-18
3.4.6 Switching Over the Paper Path.............................................................................. 3-20
3.5 Intermediate Process Tray Assembly .......................................................... 3-21
3.5.1 Overview.................................................................................................................... 3-21
3.5.2 Basic Sequence of Operations .............................................................................. 3-24
3.5.3 Stacking Operation .................................................................................................. 3-25
3.5.4 Alignment................................................................................................................... 3-29
3.5.5 Stapling Operation ................................................................................................... 3-31
3.5.6 Delivery Operation ................................................................................................... 3-33
3.6 Saddle Stitcher Unit ........................................................................................ 3-34
3.6.1 Overview.................................................................................................................... 3-34
3.6.2 Basic Sequence of Operations .............................................................................. 3-37
3.6.3 Transport ................................................................................................................... 3-38
3.6.4 Alignment................................................................................................................... 3-40
3.6.5 Stitching ..................................................................................................................... 3-43
3.6.6 Folding/Delivery........................................................................................................ 3-44
3.7 Detecting Jams................................................................................................ 3-47
3.7.1 Jam Detection in the Finisher Assembly .............................................................. 3-47
3.7.2 Jam Detection in the Stitcher Assembly............................................................... 3-49
3.8 Power Supply................................................................................................... 3-51
Contents