Canon iR4570 Series Service Manual page 312

Contents
8.7.2 Overview.................................................................................................................................................... 8-41
8.7.3 Sequence of Image Formation ................................................................................................................... 8-42
8.7.4 Sequence of Image Formation ................................................................................................................... 8-44
8.7.5 Flow of Paper (w/o/ delivery option)......................................................................................................... 8-45
8.7.6 Flow of Paper (w/ delivery option)............................................................................................................ 8-51
8.7.7 Flow of Paper ............................................................................................................................................ 8-57
8.8 Parts Replacement Procedure ........................................................................................................................... 8-64
8.8.1 Pick-up Unit 1............................................................................................................................................ 8-64
8.8.1.1 Removing the Right Cover (rear) ....................................................................................................... 8-64
8.8.1.2 Removing the Right Door................................................................................................................... 8-64
8.8.1.3 Removing the Right Door................................................................................................................... 8-66
8.8.1.4 Removing the Right Cover (lower front)............................................................................................ 8-68
8.8.1.5 Removing the Pickup Assembly 1...................................................................................................... 8-69
8.8.2 Pick-up Unit 2............................................................................................................................................ 8-69
8.8.2.1 Removing the Right Cover (rear) ....................................................................................................... 8-69
8.8.2.2 Removing the Right Cover (lower front)............................................................................................ 8-70
8.8.2.3 Removing the Pickup Assembly 2...................................................................................................... 8-70
8.8.3 Pickup Roller ............................................................................................................................................. 8-71
8.8.3.1 Removing the Pickup Roller/Feed Roller/Separation Roller.............................................................. 8-71
8.8.4 Sensor Mount............................................................................................................................................. 8-71
8.8.4.1 Removing the Right Cover (rear) ....................................................................................................... 8-71
8.8.4.2 Removing the Right Door................................................................................................................... 8-72
8.8.4.3 Removing the Right Door................................................................................................................... 8-74
8.8.4.4 Removing the Right Cover (lower front)............................................................................................ 8-75
8.8.4.5 Removing the Pickup Assembly 1...................................................................................................... 8-76
8.8.4.6 Removing the Pickup Assembly 2...................................................................................................... 8-77
8.8.4.7 Removing the Sensor Mounting Plate ................................................................................................ 8-77
8.8.4.8 Mounting the Sensor Mounting Plate ................................................................................................. 8-79
8.8.5 Cassette Pick-up Motor 1........................................................................................................................... 8-80
8.8.5.1 Removing the Rear Cover................................................................................................................... 8-80
8.8.5.2 Removing the Right Cover (rear) ....................................................................................................... 8-81
8.8.5.3 Removing the Pickup Motor Base ...................................................................................................... 8-81
8.8.5.4 Removing the Cassette Pickup Motor 1 ............................................................................................. 8-83
8.8.6 Cassette Pick-up Motor 2........................................................................................................................... 8-83
8.8.6.1 Removing the Rear Cover................................................................................................................... 8-83
8.8.6.2 Removing the Right Cover (rear) ....................................................................................................... 8-84
8.8.6.3 Removing the Pickup Motor Base ...................................................................................................... 8-84
8.8.6.4 Removing the Cassette Pickup Motor 2 ............................................................................................. 8-86
8.8.7 Cassette Size Sensor .................................................................................................................................. 8-86
8.8.7.1 Removing the Right Cover (rear) ....................................................................................................... 8-86
8.8.7.2 Removing the Right Door................................................................................................................... 8-87
8.8.7.3 Removing the Right Door................................................................................................................... 8-89
8.8.7.4 Removing the Right Cover (lower front)............................................................................................ 8-90
8.8.7.5 Removing the Pickup Assembly 2...................................................................................................... 8-91
8.8.7.6 Removing the Pickup Assembly 1...................................................................................................... 8-91
8.8.7.7 Removing the Cassette Size Sensor.................................................................................................... 8-92
8.8.8 Cassette Retry Paper Sensor ...................................................................................................................... 8-94
8.8.8.1 Removing the Right Cover (rear) ....................................................................................................... 8-94
8.8.8.2 Removing the Right Door................................................................................................................... 8-94