Canon iR2020 Series Service Manual page 14

Contents
7.5.11.1 Removing the Feed and Separation Rollers............................................................................. 7- 15
7.5.12 Separation Pad ..................................................................................................................................... 7- 15
7.5.12.1 Removing the Drum Unit.............................................................................................................. 7- 15
7.5.12.2 Removing the Transfer Registration Unit .................................................................................. 7- 15
7.5.12.3 Removing the Feed Guide........................................................................................................... 7- 15
7.5.12.4 Removing the Multifeeder Pickup Roller ................................................................................... 7- 15
7.5.12.5 Removing the Separation Pad .................................................................................................... 7- 16
Chapter 8 Fixing System
8.1 Construction ..................................................................................................................................................... 8- 1
8.1.1 Specifications, Control Mechanisms, and Functions.......................................................................... 8- 1
8.1.2 Major Components................................................................................................................................... 8- 2
8.2 Various Control Mechanisms ........................................................................................................................ 8- 3
8.2.1 Controlling the Speed of the Fixing Film ............................................................................................... 8- 3
8.2.1.1 Controlling the Fixing Film Speed .................................................................................................. 8- 3
8.2.2 Controlling the Fixing Film Temperature............................................................................................... 8- 3
8.2.2.1 Outline................................................................................................................................................. 8- 3
8.2.2.2 Controlling the Fixing Film Temperature ....................................................................................... 8- 3
8.2.2.3 Target Temperatures by Mode ....................................................................................................... 8- 4
8.2.3 Detecting the Passage of Paper ............................................................................................................ 8- 4
8.2.3.1 Detecting the Passage of Paper ..................................................................................................... 8- 4
8.3 Protective Functions ....................................................................................................................................... 8- 5
8.3.1 Protective Functions ................................................................................................................................ 8- 5
8.4 Parts Replacement Procedure...................................................................................................................... 8- 7
8.4.1 Fixing Unit .................................................................................................................................................. 8- 7
8.4.1.1 Removing the Drum Unit.................................................................................................................. 8- 7
8.4.1.2 Removing the rear cover.................................................................................................................. 8- 7
8.4.1.3 Removing the Left Cover (Rear)..................................................................................................... 8- 7
8.4.1.4 Removing the Left Door ................................................................................................................... 8- 7
8.4.1.5 Removing the Fixing Unit................................................................................................................. 8- 8
8.4.2 Pressure Roller ......................................................................................................................................... 8- 9
8.4.2.1 Removing the Drum Unit.................................................................................................................. 8- 9
8.4.2.2 Removing the rear cover.................................................................................................................. 8- 9
8.4.2.3 Removing the Left Cover (Rear)..................................................................................................... 8- 9
8.4.2.4 Removing the Left Door ................................................................................................................... 8- 9
8.4.2.5 Removing the Fixing Unit............................................................................................................... 8- 10
8.4.2.6 Removing the Fixing Film Unit ...................................................................................................... 8- 10
8.4.2.7 Removing the Pressure Roller ...................................................................................................... 8- 12
8.4.3 Fixing Film................................................................................................................................................ 8- 13
8.4.3.1 Removing the Drum Unit................................................................................................................ 8- 13
8.4.3.2 Removing the rear cover................................................................................................................ 8- 13
8.4.3.3 Removing the Left Cover (Rear)................................................................................................... 8- 13
8.4.3.4 Removing the Left Door ................................................................................................................. 8- 13
8.4.3.5 Removing the Fixing Unit............................................................................................................... 8- 14
8.4.3.6 Removing the Fixing Film Unit ...................................................................................................... 8- 15
8.4.4 Fixing Delivery Sensor ........................................................................................................................... 8- 17
8.4.4.1 Removing the Drum Unit................................................................................................................ 8- 17
8.4.4.2 Removing the Rear Cover ............................................................................................................. 8- 17