Canon IR6570 Series Service Manual page 16

Contents
8.3 Detecting Jams................................................................................................................................................. 8- 10
8.3.1 Jam Detection Outline ............................................................................................................................... 8- 10
8.3.1.1 Outline ............................................................................................................................................... 8- 10
8.3.1.2 Jam History ........................................................................................................................................ 8- 11
8.3.2 Delay Jams ................................................................................................................................................ 8- 12
8.3.2.1 Cassette Pickup Assembly (right deck, left deck, cassette 3/4)......................................................... 8- 12
8.3.2.2 Other Delay Jam ................................................................................................................................ 8- 12
8.3.3 Stationary Jams ......................................................................................................................................... 8- 13
8.3.3.1 Common Delay Jams ......................................................................................................................... 8- 13
8.3.3.2 Power-On Stationary Jam .................................................................................................................. 8- 14
8.4 Cassette Pick-Up Unit...................................................................................................................................... 8- 16
8.4.1Lifter Operation (cassette 3/4) ................................................................................................................... 8- 16
8.4.2Detecting the Presence/Absence of Paper ................................................................................................. 8- 17
8.4.3Outline of the Paper Level Detection Mechanism..................................................................................... 8- 18
8.4.4Paper Level Detection (cassette 3/4) ......................................................................................................... 8- 18
8.4.5Identifying the Size of Paper (cassette 3/4) ............................................................................................... 8- 19
8.4.6Markings on the Width Guide Rail............................................................................................................ 8- 20
8.4.7Paper Size .................................................................................................................................................. 8- 20
8.5 Manual Feed Pickup Unit ................................................................................................................................ 8- 24
8.5.1Pickup Operation ....................................................................................................................................... 8- 24
8.5.2Detecting the Size of Paper in the Manual Feed Tray ............................................................................... 8- 24
8.6 Deck ................................................................................................................................................................. 8- 26
8.6.1Lifter Operation (right/left deck) ............................................................................................................... 8- 26
8.6.2Lifter Limiter (right/left deck) Control Circuit.......................................................................................... 8- 27
8.6.3Detecting the Presence/Absence of Paper ................................................................................................. 8- 28
8.6.4Outline of Paper Level Detection .............................................................................................................. 8- 29
8.6.5Paper Level Detection Operation (right/left deck) .................................................................................... 8- 29
8.6.6Identifying the Size of Paper (right/left deck) ........................................................................................... 8- 30
8.7 Registration Unit.............................................................................................................................................. 8- 31
8.7.1Outline ....................................................................................................................................................... 8- 31
8.7.2Control System .......................................................................................................................................... 8- 31
8.8 Duplex Feeding Unit........................................................................................................................................ 8- 32
8.8.1Moving the Paper to the Reversing Assembly After Printing on the 1st Side .......................................... 8- 32
8.8.2Moving the Paper to the Duplexing Feed Assembly From the Reversing Assembly ............................... 8- 32
8.8.3Outline ....................................................................................................................................................... 8- 33
8.8.4Sequence of Printing Operation................................................................................................................. 8- 34
8.8.5Outline of Through-Path Operation........................................................................................................... 8- 34
8.8.6Through-Path Operation ............................................................................................................................ 8- 35
8.8.7Outline of Horizontal Registration Position .............................................................................................. 8- 39
8.8.8Horizontal Registration Position Detection Operation .............................................................................. 8- 40
8.9 Delivery ........................................................................................................................................................... 8- 42
8.9.1Reversal Delivery Operation ..................................................................................................................... 8- 42
8.10 Parts Replacement Procedure ........................................................................................................................ 8- 44
8.10.1 Pickup Roller........................................................................................................................................... 8- 44
8.10.1.1 Removing the Right Deck/ Cassette Pickup Assembly ................................................................... 8- 44
8.10.1.2 Removing the Left Deck Pickup Assembly..................................................................................... 8- 44
8.10.1.3 Removing the Pickup Roller............................................................................................................ 8- 45
8.10.1.4 Orientation of the Deck/Cassette Pickup Roller .............................................................................. 8- 45
8.10.2 Cassette Pickup Assembly ...................................................................................................................... 8- 46