Canon ImageRunner iR8500 Series Service Manual page 485

Contents
10.1 Construction ...............................................................................................................................................................10-1
10.1.1 Outline...................................................................................................................................................................................... 10-1
10.1.2 Outline...................................................................................................................................................................................... 10-1
10.1.3 Outline...................................................................................................................................................................................... 10-1
10.1.4 Outline...................................................................................................................................................................................... 10-2
10.1.5 Major Components................................................................................................................................................................... 10-2
10.1.6 Fixing Drive System Outline ................................................................................................................................................... 10-3
10.1.7 Controlling the Fixing Roller Drive Mechanism ..................................................................................................................... 10-4
10.1.8 Controlling the Cleaning Belt Drive Mechanism .................................................................................................................... 10-5
10.1.9 Controlling the Thermistor Reciprocating Mechanism ........................................................................................................... 10-5
10.1.10 Controlling the Upper Separation Claw Reciprocating Mechanism...................................................................................... 10-6
10.2 Basic Sequence ..........................................................................................................................................................10-7
10.2.1 Basic Sequence ........................................................................................................................................................................ 10-7
10.2.2 Basic Sequence ........................................................................................................................................................................ 10-7
10.2.3 Basic Sequence ........................................................................................................................................................................ 10-7
10.3 Various Control Mechanisms.....................................................................................................................................10-9
10.3.1 Controlling the Fixing Roller Temperature ............................................................................................................................. 10-9
10.3.1.1 Down Sequence Control .............................................................................................................................................................................10-9
10.3.1.2 Down Sequence Control .............................................................................................................................................................................10-9
10.3.1.3 Down Sequence Control ...........................................................................................................................................................................10-10
10.3.1.4 Down Sequence Control ...........................................................................................................................................................................10-11
10.3.1.5 Fixing Temperature Control(iR105) .........................................................................................................................................................10-12
10.3.1.6 Transparency Mode...................................................................................................................................................................................10-13
10.3.1.7 Transparency Mode...................................................................................................................................................................................10-13
10.3.1.8 Transparency Mode...................................................................................................................................................................................10-14
10.3.1.9 Thick Paper Mode .....................................................................................................................................................................................10-15
10.3.1.10 Thick Paper Mode ...................................................................................................................................................................................10-15
10.3.1.11 Thick Paper Mode ...................................................................................................................................................................................10-15
10.3.1.12 Thick Paper Mode ...................................................................................................................................................................................10-16
10.3.1.13 Thick Paper Mode ...................................................................................................................................................................................10-16
10.3.1.14 Power Save Mode ...................................................................................................................................................................................10-16
10.3.1.15 Power Save Mode ...................................................................................................................................................................................10-17
10.4 Protective Functions.................................................................................................................................................10-18
10.4.1 Detecting an Error.................................................................................................................................................................. 10-18
10.4.2 Detecting an Error.................................................................................................................................................................. 10-18
10.5 Parts Replacement Procedure...................................................................................................................................10-20
10.5.1 Fixing Unit ............................................................................................................................................................................. 10-20
10.5.1.1 Removing the Fixing Assembly................................................................................................................................................................10-20
10.5.2 Upper Fixing Roller ............................................................................................................................................................... 10-21
10.5.2.1 Removing the Fixing Upper Roller...........................................................................................................................................................10-21
10.5.2.2 Removing the Fixing Upper Roller...........................................................................................................................................................10-22
10.5.2.3 Mounting the Fixing Upper Roller............................................................................................................................................................10-23
10.5.2.4 Mounting the Fixing Upper Roller............................................................................................................................................................10-23
10.5.3 Lower Fixing Roller............................................................................................................................................................... 10-23
10.5.3.1 Removing the Lower Fixing Roller ..........................................................................................................................................................10-23
10.5.3.2 Adjusting the Lower Roller Pressure (nip width) .....................................................................................................................................10-24
10.5.3.3 Adjusting the Lower Roller Pressure (nip) ...............................................................................................................................................10-24
10.5.4 External Delivery Roller ........................................................................................................................................................ 10-24
10.5.4.1 Removing the External Delivery Roller....................................................................................................................................................10-24
10.5.4.2 Removing the External Delivery Roller....................................................................................................................................................10-25
10.5.5 Internal Delivery Roller ......................................................................................................................................................... 10-26
10.5.5.1 Removing the Internal Delivery Roller.....................................................................................................................................................10-26
Contents