Canon iR3245, Service Manual

Page: 281 / 746

Contents
Contents
9.1 Construction ...................................................................................................................................................................9-1
9.1.1 Specifications, Control Mechanisms, and Functions ................................................................................................................... 9-1
9.1.2 Major Components....................................................................................................................................................................... 9-1
9.2 Basic Sequence ..............................................................................................................................................................9-2
9.2.1 Power-On Sequence..................................................................................................................................................................... 9-2
9.2.2 Down Sequence ........................................................................................................................................................................... 9-2
9.3 Various Control Mechanisms.........................................................................................................................................9-3
9.3.1 Controlling the Speed of the Fixing Film .................................................................................................................................... 9-3
9.3.1.1 Controlling the Fixing Film Speed in Response to Low Temperature ...........................................................................................................9-3
9.3.1.2 Controlling the Fixing Film Speed..................................................................................................................................................................9-3
9.3.2 Controlling the Fixing Film Temperature.................................................................................................................................... 9-3
9.3.2.1 Controlling the Power Supply in Response to Low Temperature...................................................................................................................9-3
9.3.2.2 Controlling the Feeding in Response to Low Temperature ............................................................................................................................9-3
9.3.2.3 Controlling the Power Supply at Start-Up ......................................................................................................................................................9-4
9.3.2.4 Copying Temperature Control ........................................................................................................................................................................9-4
9.3.2.5 Changing the Fixing Film Control Temperature.............................................................................................................................................9-4
9.3.2.6 Temperature Control in Response to Automatic Double-Sided Copy............................................................................................................9-4
9.3.2.7 Temperature Control in Response to Change of Paper Size ...........................................................................................................................9-4
9.3.3 Cleaning ....................................................................................................................................................................................... 9-5
9.3.3.1 Fixing Film Cleaning ......................................................................................................................................................................................9-5
9.3.4 Detecting the Passage of Paper .................................................................................................................................................... 9-5
9.3.4.1 Detecting the Passage of Paper .......................................................................................................................................................................9-5
9.4 Protective Functions.......................................................................................................................................................9-6
9.4.1 Protective Functions..................................................................................................................................................................... 9-6
9.4.2 Detecting an Error........................................................................................................................................................................ 9-7
9.5 Parts Replacement Procedure.........................................................................................................................................9-8
9.5.1 Fixing Unit ................................................................................................................................................................................... 9-8
9.5.1.1 Before Removing the Fixing Unit...................................................................................................................................................................9-8
9.5.1.2 Removing the Fixing Unit...............................................................................................................................................................................9-8
9.5.2 Pressure Roller ............................................................................................................................................................................. 9-8
9.5.2.1 Before Removing the Pressure Roller.............................................................................................................................................................9-8
9.5.2.2 Removing the Pressure Roller.........................................................................................................................................................................9-8
9.5.3 Cleaning Roller ............................................................................................................................................................................ 9-9
9.5.3.1 Before Removing the Cleaning Roller ............................................................................................................................................................9-9
9.5.3.2 Removing the Cleaning Roller........................................................................................................................................................................9-9
9.5.4 Fixing Film................................................................................................................................................................................. 9-10
9.5.4.1 Before Removing the Fixing Film Unit ........................................................................................................................................................9-10
9.5.4.2 Removing the Fixing Film Unit ....................................................................................................................................................................9-10
9.5.5 Internal Delivery Sensor ............................................................................................................................................................ 9-12
9.5.5.1 Before Removing the Internal Delivery Sensor ............................................................................................................................................9-12
9.5.5.2 Removing the Internal Delivery Sensor ........................................................................................................................................................9-12
9.5.6 Fixing Film Sensor..................................................................................................................................................................... 9-13
9.5.6.1 Before Removing the Fixing Film Sensor ....................................................................................................................................................9-13
9.5.6.2 Removing the Fixing Film Sensor ................................................................................................................................................................9-13
9.5.7 Fixing Inlet Guide ...................................................................................................................................................................... 9-14
9.5.7.1 Before Removing the Fixing Inlet Guide......................................................................................................................................................9-14
9.5.7.2 Removing the Fixing Inlet Guide..................................................................................................................................................................9-14