Canon iR7086, Service Manual

Page: 161 / 735

Contents
Contents
4.1 Construction ...................................................................................................................................................................4-1
4.1.1 Construction/Functions ................................................................................................................................................................ 4-1
4.2 Construction of the Electrical Circuitry .........................................................................................................................4-2
4.2.1 Main Controller PCB ................................................................................................................................................................... 4-2
4.2.2 Main Controller PCB (up graded version)................................................................................................................................... 4-3
4.3 Start-Up Sequence..........................................................................................................................................................4-4
4.3.1 Overview...................................................................................................................................................................................... 4-4
4.3.2 Start-Up Sequence ....................................................................................................................................................................... 4-5
4.3.3 Action to Take in Response to E602............................................................................................................................................ 4-6
4.4 Shut-Down Sequence .....................................................................................................................................................4-8
4.4.1 Flow of Operation ........................................................................................................................................................................ 4-8
4.5 Image Processing ...........................................................................................................................................................4-8
4.5.1 Overview of the Image Flow ....................................................................................................................................................... 4-8
4.5.2 Configuration of the Image Processing Modules......................................................................................................................... 4-9
4.5.3 Reader Input Image Processing ................................................................................................................................................. 4-10
4.5.4 Compression/Expansion/Editing Block ..................................................................................................................................... 4-11
4.5.5 Printer Output Image Processing ............................................................................................................................................... 4-12
4.6 Parts Replacement Procedure.......................................................................................................................................4-13
4.6.1 Main Controller Box .................................................................................................................................................................. 4-13
4.6.1.1 Making Preparations .....................................................................................................................................................................................4-13
4.6.1.2 Removing the Main Controller Box..............................................................................................................................................................4-13
4.6.2 Main Controller PCB ................................................................................................................................................................. 4-14
4.6.2.1 Making Preparations .....................................................................................................................................................................................4-14
4.6.2.2 Removing the Main Controller PCB.............................................................................................................................................................4-15
4.6.2.3 Removing the Main Controller PCB (up graded version) ............................................................................................................................4-15
4.6.2.4 When Replacing the Main Controller PCB...................................................................................................................................................4-15
4.6.2.5 When Replacing the Main Controller PCB (up graded version) ..................................................................................................................4-16
4.6.3 SDRAM ..................................................................................................................................................................................... 4-17
4.6.3.1 Making Preparations .....................................................................................................................................................................................4-17
4.6.3.2 Removing the DDR-SDRAM .......................................................................................................................................................................4-17
4.6.4 Boot ROM.................................................................................................................................................................................. 4-18
4.6.4.1 Making Preparations .....................................................................................................................................................................................4-18
4.6.4.2 Removing the Boot ROM .............................................................................................................................................................................4-18
4.6.4.3 Removing the Boot ROM (up graded version) .............................................................................................................................................4-18
4.6.5 HDD ........................................................................................................................................................................................... 4-18
4.6.5.1 Points to Note on Handling the Hard Disk....................................................................................................................................................4-18
4.6.5.2 Making Preparations .....................................................................................................................................................................................4-18
4.6.5.3 Removing the Hard Disk...............................................................................................................................................................................4-18
4.6.5.4 Removing the Hard Disk(up graded version) ...............................................................................................................................................4-19
4.6.5.5 Points to Note When Mounting the Hard Disk .............................................................................................................................................4-19
4.6.5.6 After Replacing the Hard Disk......................................................................................................................................................................4-19
4.6.6 Video PCB ................................................................................................................................................................................. 4-19
4.6.6.1 Making Preparations .....................................................................................................................................................................................4-19
4.6.6.2 Removing the Video PCB .............................................................................................................................................................................4-20
4.6.7 Reader I/F PCB .......................................................................................................................................................................... 4-20
4.6.7.1 Making Preparations .....................................................................................................................................................................................4-20
4.6.7.2 Removing the Reader I/F PCB......................................................................................................................................................................4-21
4.6.8 Controller Fan ............................................................................................................................................................................ 4-21
4.6.8.1 Making Preparations .....................................................................................................................................................................................4-21
4.6.8.2 Removing the Controller Fan........................................................................................................................................................................4-22