Canon iR8500 Service Manual page 15

Contents
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
10.5.5.2 Removing the Internal Delivery Roller................................................................................................................................ 10- 26
10.5.6 Main Thermistor .................................................................................................................................................10- 26
10.5.6.1 Removing the Main Thermistor .......................................................................................................................................... 10- 26
10.5.6.2 Removing the Main Thermistor .......................................................................................................................................... 10- 27
10.5.6.3 Mounting the Main Thermistor ........................................................................................................................................... 10- 27
10.5.6.4 Mounting the Main Thermistor ........................................................................................................................................... 10- 27
10.5.7 Sub Thermistor...................................................................................................................................................10- 27
10.5.7.1 Removing the Sub Thermistor ........................................................................................................................................... 10- 27
10.5.7.2 Removing the Sub Thermistor ........................................................................................................................................... 10- 28
10.5.8 Thermal Switch ..................................................................................................................................................10- 28
10.5.8.1 Removing the Thermal Switch Unit.................................................................................................................................... 10- 28
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