Canon ImageRunner iR8500 Series Service Manual page 401

Contents
9.1 Construction ...................................................................................................................................................................9-1
9.1.1 Outline of the Pickup/Feeding System(iR105) ............................................................................................................................ 9-1
9.1.2 Specifications and Construction .................................................................................................................................................. 9-3
9.1.3 Optical Sensors(iR105) ................................................................................................................................................................ 9-4
9.1.4 Arrangement of Rollers and Sensors ........................................................................................................................................... 9-4
9.1.5 Arrangement of Rollers and Sensors ........................................................................................................................................... 9-5
9.1.6 Control System............................................................................................................................................................................. 9-6
9.1.7 Index Paper Attachment............................................................................................................................................................... 9-7
9.1.8 Controlling the Pickup Motor (M2) ............................................................................................................................................. 9-8
9.2 Basic Sequence ..............................................................................................................................................................9-9
9.2.1 Right Deck ................................................................................................................................................................................... 9-9
9.2.2 Pickup from the front deck .......................................................................................................................................................... 9-9
9.2.3 Pickup from the cassette 4 ......................................................................................................................................................... 9-10
9.2.4 Pickup from the cassette 4 ......................................................................................................................................................... 9-11
9.3 Detecting Jams .............................................................................................................................................................9-12
9.3.1 Jam Detection Outline................................................................................................................................................................ 9-12
9.3.1.1 Outline...........................................................................................................................................................................................................9-12
9.3.1.2 Outline...........................................................................................................................................................................................................9-13
9.3.2 Delay Jams ................................................................................................................................................................................. 9-14
9.3.2.1 Cassette Pickup (Right deck, Left deck, cassette 3, 4)..................................................................................................................................9-14
9.3.2.2 Cassette Pickup (Right deck, Left deck, cassette 3, 4)..................................................................................................................................9-14
9.3.2.3 Other Delay Jams ..........................................................................................................................................................................................9-15
9.3.2.4 Other Delay Jams ..........................................................................................................................................................................................9-16
9.3.2.5 Other Delay Jams ..........................................................................................................................................................................................9-17
9.3.3 Stationary Jams .......................................................................................................................................................................... 9-18
9.3.3.1 Common Stationary Jams .............................................................................................................................................................................9-18
9.3.3.2 Common Stationary Jams .............................................................................................................................................................................9-19
9.3.3.3 Stationary Jam at Power-On..........................................................................................................................................................................9-19
9.4 Cassette Pick-Up Unit ..................................................................................................................................................9-20
9.4.1 Outline........................................................................................................................................................................................ 9-20
9.4.2 Detecting the Presence/Absence of Paper.................................................................................................................................. 9-21
9.4.3 Detecting the Level of Paper...................................................................................................................................................... 9-22
9.4.4 Cassette 3/4 ................................................................................................................................................................................ 9-23
9.4.5 Markings on the Width Guide Rail ............................................................................................................................................ 9-24
9.4.6 Paper Size................................................................................................................................................................................... 9-24
9.5 Manual Feed Pickup Unit ............................................................................................................................................9-27
9.5.1 Pickup Operation ....................................................................................................................................................................... 9-27
9.5.2 Detecting the Paper Size ............................................................................................................................................................ 9-27
9.6 Deck .............................................................................................................................................................................9-29
9.6.1 Outline........................................................................................................................................................................................ 9-29
9.6.2 Lifter Limiter (deck right/left) ................................................................................................................................................... 9-30
9.6.3 Detecting the Presence/Absence of Paper.................................................................................................................................. 9-31
9.6.4 Detecting the Level of Paper...................................................................................................................................................... 9-32
9.6.5 Cassette Deck Right/Left ........................................................................................................................................................... 9-34
9.7 Registration Unit ..........................................................................................................................................................9-35
9.7.1 Outline........................................................................................................................................................................................ 9-35
9.7.2 Control System........................................................................................................................................................................... 9-35
9.7.3 Sequence of Operations (registration brake).............................................................................................................................. 9-35
9.8 Duplex Feeding Unit ....................................................................................................................................................9-37
9.8.1 Copying on the First Side .......................................................................................................................................................... 9-37
9.8.2 Printing on the First Side ........................................................................................................................................................... 9-37
Contents