ContentsChapter 8 Pickup/Feeding System8.1 Construction .....................................................................................................................................................8- 18.1.1 Specifications, Controls, and Functions................................................................................................8- 18.1.2 Division into Blocks ..................................................................................................................................8- 38.1.3 Arrangement of Rollers............................................................................................................................8- 48.1.4 Diagram of Paper Paths (w/ copy tray )................................................................................................8- 68.1.5 Diagram of Paper Paths (w/ Finisher-Z1/copy tray)............................................................................8- 78.1.6 Diagram of Paper Paths (w/ Finisher-Y1/Saddle Finisher-Y2)..........................................................8- 78.1.7 Arrangement of Sensors .........................................................................................................................8- 88.1.8 Route of Drive .........................................................................................................................................8- 108.2 Basic Sequence.............................................................................................................................................8- 118.2.1 Basic Sequence......................................................................................................................................8- 118.3 Controlling the Feeding Speed....................................................................................................................8- 118.3.1 Increase in Speed ..................................................................................................................................8- 118.3.2 Feeding Speed According to the Print Media and Resolution .......................................................8- 138.3.3 Feeding Speed of Each Feeding Path and Timing for Switching Feeding Speed ......................8- 138.3.4 Reversing Accelerating Control of Large Size Paper .......................................................................8- 168.4 Detecting Jams ..............................................................................................................................................8- 168.4.1 Delay Jams ..............................................................................................................................................8- 168.4.1.1 Delay Jam for Those Other Than the Pickup Unit .....................................................................8- 168.4.1.2 Delay Jam for the Pickup Unit .......................................................................................................8- 188.4.2 Stationary Jams.......................................................................................................................................8- 188.4.2.1 Common Stationary Jam................................................................................................................8- 188.4.2.2 Stationary Jam at Power-On .........................................................................................................8- 188.4.3 Other Jams...............................................................................................................................................8- 208.4.3.1 Size Difference Jam ........................................................................................................................8- 208.4.3.2 Material Difference Jam .................................................................................................................8- 208.4.3.3 Door Open Jam ...............................................................................................................................8- 208.5 Cassette Pick-Up Unit...................................................................................................................................8- 208.5.1 Overview ..................................................................................................................................................8- 208.5.2 Basic Sequence .....................................................................................................................................8- 228.5.3 Identifying the Paper Size .....................................................................................................................8- 228.5.4 Setting Up the Universal Cassette.......................................................................................................8- 248.5.5 Paper Level Sensor................................................................................................................................8- 248.6 Manual Feed Pickup Unit .............................................................................................................................8- 268.6.1 Overview ..................................................................................................................................................8- 268.6.2 Basic Sequence of Operation...............................................................................................................8- 288.6.3 Identifying the Paper Size .....................................................................................................................8- 298.7 Registration Unit ............................................................................................................................................8- 298.7.1 Overview ..................................................................................................................................................8- 298.7.2 Control of Registration Unit ..................................................................................................................8- 308.7.3 Checking Horizontal Registration ........................................................................................................8- 308.7.4 Material Difference Jam Detection .....................................................................................................8- 318.8 Pre-Fixing Feeding........................................................................................................................................8- 318.8.1 Fixing Arch Control.................................................................................................................................8- 318.9 Duplex Feeding Unit .....................................................................................................................................8- 338.9.1 Overview ..................................................................................................................................................8- 338.9.2 The Number of Circulating Sheets at Duplexing Feeding................................................................8- 34
