Canon iR3245 Series Service Manual page 229

Contents
8.1 Construction ...................................................................................................................................................................8-1
8.1.1 Specifications, Controls, and Functions....................................................................................................................................... 8-1
8.1.2 Division into Blocks .................................................................................................................................................................... 8-2
8.1.3 Arrangement of Rollers................................................................................................................................................................ 8-3
8.1.4 Diagram of Paper Paths (w/ 3 Way Unit-A1/ copy tray)............................................................................................................. 8-4
8.1.5 Diagram of Paper Paths (w/ Inbody Finisher/ copy tray) ............................................................................................................ 8-5
8.1.6 Diagram of Paper Paths (w/ Finisher/Saddle Finisher)................................................................................................................ 8-6
8.1.7 Arrangement of Sensors............................................................................................................................................................... 8-7
8.1.8 Route of Drive.............................................................................................................................................................................. 8-8
8.2 Basic Sequence ............................................................................................................................................................8-10
8.2.1 Basic Sequence .......................................................................................................................................................................... 8-10
8.2.2 Acceleration Intervals ................................................................................................................................................................ 8-10
8.3 Detecting Jams .............................................................................................................................................................8-14
8.3.1 Delay Jams ................................................................................................................................................................................. 8-14
8.3.1.1 Delay Jam Outside the Cassette Pickup Assembly .......................................................................................................................................8-14
8.3.1.2 Delay Jam in the Cassette Pickup Assembly ................................................................................................................................................8-14
8.3.2 Stationary Jams .......................................................................................................................................................................... 8-15
8.3.2.1 Common Stationary Jam ...............................................................................................................................................................................8-15
8.3.2.2 Stationary Jam at Power-On..........................................................................................................................................................................8-15
8.3.3 Other Jams ................................................................................................................................................................................. 8-15
8.3.3.1 Door Open Jam .............................................................................................................................................................................................8-15
8.3.3.2 Paper size mismatch JAM .............................................................................................................................................................................8-16
8.3.3.3 Error retry JAM.............................................................................................................................................................................................8-16
8.4 Cassette Pick-Up Unit ..................................................................................................................................................8-17
8.4.1 Overview.................................................................................................................................................................................... 8-17
8.4.2 Basic Sequence .......................................................................................................................................................................... 8-17
8.4.3 Identifying the Paper Size .......................................................................................................................................................... 8-18
8.4.4 Setting Up the Universal Cassette.............................................................................................................................................. 8-19
8.4.5 Paper Level Sensor .................................................................................................................................................................... 8-20
8.5 Manual Feed Pickup Unit ............................................................................................................................................8-22
8.5.1 Overview.................................................................................................................................................................................... 8-22
8.5.2 Basic Sequence of Operation ..................................................................................................................................................... 8-22
8.5.3 Identifying the Paper Size .......................................................................................................................................................... 8-23
8.5.4 Paper Retaining Mechanism ...................................................................................................................................................... 8-24
8.6 Registration Unit ..........................................................................................................................................................8-25
8.6.1 Overview.................................................................................................................................................................................... 8-25
8.6.2 Checking Horizontal Registration.............................................................................................................................................. 8-25
8.7 Duplex Feeding Unit ....................................................................................................................................................8-26
8.7.1 Overview.................................................................................................................................................................................... 8-26
8.7.2 Sequence of Image Formation ................................................................................................................................................... 8-27
8.7.3 Flow of Paper ............................................................................................................................................................................. 8-28
8.8 Parts Replacement Procedure.......................................................................................................................................8-30
8.8.1 Pick-up Unit 1 ............................................................................................................................................................................ 8-30
8.8.1.1 Before Removing the Pickup Unit 1 .............................................................................................................................................................8-30
8.8.1.2 Removing the Pickup Unit 1 .........................................................................................................................................................................8-30
8.8.2 Pick-up Unit 2 ............................................................................................................................................................................ 8-30
8.8.2.1 Before Removing the Pickup Unit 2 .............................................................................................................................................................8-30
8.8.2.2 Removing the Pickup Unit 2 .........................................................................................................................................................................8-30
8.8.3 Pickup Roller ............................................................................................................................................................................. 8-30
8.8.3.1 Removing the Pickup Roller/Feed Roller/Separation Roller ........................................................................................................................8-30
8.8.4 Sensor Mount ............................................................................................................................................................................. 8-31
Contents