Canon iR3245 Series Service Manual page 14

Contents
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
8.8.4.1 Before Removing the Sensor Mounting Plate........................................................................................................................ 8- 31
8.8.4.2 Removing the Sensor Mounting Plate ................................................................................................................................... 8- 31
8.8.4.3 Attaching the Sensor Mounting Plate..................................................................................................................................... 8- 31
8.8.5 Cassette Pick-up Motor 1.......................................................................................................................................8- 32
8.8.5.1 Before Removing the Cassette Pickup Motor 1 ..................................................................................................................... 8- 32
8.8.5.2 Removing the Cassette Pickup Motor 1................................................................................................................................. 8- 32
8.8.6 Cassette Pick-up Motor 2.......................................................................................................................................8- 33
8.8.6.1 Before Removing the Cassette Pickup Motor 2 ..................................................................................................................... 8- 33
8.8.6.2 Removing the Cassette Pickup Motor 2................................................................................................................................. 8- 33
8.8.7 Cassette Size Sensor ............................................................................................................................................8- 33
8.8.7.1 Before Removing the Cassette Size Sensor.......................................................................................................................... 8- 33
8.8.7.2 Removing the Cassette Size Sensor ..................................................................................................................................... 8- 33
8.8.8 Cassette Retry Paper Sensor ................................................................................................................................8- 34
8.8.8.1 Before Removing the Cassette Retry Paper Sensor ............................................................................................................. 8- 34
8.8.8.2 Removing the Cassette Retry Paper Sensor ......................................................................................................................... 8- 34
8.8.9 Cassette Paper Sensor..........................................................................................................................................8- 34
8.8.9.1 Before Removing the Cassette Paper Sensor ....................................................................................................................... 8- 34
8.8.9.2 Removing the Cassette Paper Sensor................................................................................................................................... 8- 34
8.8.10 Cassette Paper Level Sensor (A/B) .....................................................................................................................8- 34
8.8.10.1 Before Removing the Cassette Paper Level Sensor (A/B) .................................................................................................. 8- 34
8.8.10.2 Removing the Cassette Paper Level Sensor (A/B) .............................................................................................................. 8- 34
8.8.11 Slide Resistor .......................................................................................................................................................8- 34
8.8.11.1 Before Removing the Slide Resistor .................................................................................................................................... 8- 34
8.8.11.2 Removing the Slide Resistor................................................................................................................................................ 8- 35
8.8.12 Cassette Pickup Solenoid ....................................................................................................................................8- 35
8.8.12.1 Before Removing the Cassette Pickup Solenoid ................................................................................................................. 8- 35
8.8.12.2 Removing the Cassette Pickup Solenoid ............................................................................................................................. 8- 35
8.8.13 Manual Tray Assembly.........................................................................................................................................8- 35
8.8.13.1 Before Removing the Manual Feed Tray Unit...................................................................................................................... 8- 35
8.8.13.2 Removing the Manual Feed Tray Unit ................................................................................................................................. 8- 35