Canon imageRUNNER 5065 series Service Manual page 111

Contents
4.1 Construction ...................................................................................................................................................................4-1
4.1.1 Construction and Mechanisms ..................................................................................................................................................... 4-1
4.2 Construction of the Electrical Circuitry .........................................................................................................................4-1
4.2.1 Main Controller PCB ................................................................................................................................................................... 4-1
4.2.2 HDD ............................................................................................................................................................................................. 4-2
4.3 Start-Up Sequence..........................................................................................................................................................4-4
4.3.1 Overview...................................................................................................................................................................................... 4-4
4.3.2 Start-Up Sequence ....................................................................................................................................................................... 4-4
4.4 Shut-Down Sequence .....................................................................................................................................................4-6
4.4.1 Overview...................................................................................................................................................................................... 4-6
4.4.2 Flow of Operation ........................................................................................................................................................................ 4-6
4.5 Image Processing ...........................................................................................................................................................4-6
4.5.1 Overview of the Image Flow ....................................................................................................................................................... 4-6
4.5.2 Construction of the Image Processing Module ............................................................................................................................ 4-7
4.5.3 Reader Unit Input Image Processing ........................................................................................................................................... 4-7
4.5.4 Compression/ Extension/ Editing Block...................................................................................................................................... 4-8
4.5.5 Printer unit Output Image Processing .......................................................................................................................................... 4-8
4.6 Flow of Image Data........................................................................................................................................................4-9
4.6.1 Flow of Image Data According to Copy Functions ..................................................................................................................... 4-9
4.6.2 Flow of Image Data for the Box Function ................................................................................................................................... 4-9
4.6.3 Flow of Image Data for the SEND Function ............................................................................................................................. 4-10
4.6.4 Flow of Image Data for the Fax Transmission .......................................................................................................................... 4-10
4.6.5 Flow of Image Data for the Fax Reception Function ................................................................................................................ 4-11
4.6.6 Flow of Image Data for the PDL Function ................................................................................................................................ 4-11
4.7 Parts Replacement Procedure.......................................................................................................................................4-13
4.7.1 Main Controller Box .................................................................................................................................................................. 4-13
4.7.1.1 Before Removing the Main Controller Box..................................................................................................................................................4-13
4.7.1.2 Removing the Main Controller Box..............................................................................................................................................................4-13
4.7.2 Main Controller PCB ................................................................................................................................................................. 4-13
4.7.2.1 Before Removing the Main Controller PCB.................................................................................................................................................4-13
4.7.2.2 Removing the Main Controller PCB.............................................................................................................................................................4-13
4.7.2.3 When Replacing the Main Controller PCB...................................................................................................................................................4-14
4.7.3 SDRAM ..................................................................................................................................................................................... 4-14
4.7.3.1 Before Removing the SDRAM .....................................................................................................................................................................4-14
4.7.3.2 Removing the SDRAM .................................................................................................................................................................................4-14
4.7.4 Boot ROM.................................................................................................................................................................................. 4-14
4.7.4.1 Before Removing the Boot ROM .................................................................................................................................................................4-14
4.7.4.2 Removing the Boot ROM .............................................................................................................................................................................4-14
4.7.5 HDD ........................................................................................................................................................................................... 4-15
4.7.5.1 Before Removing HDD.................................................................................................................................................................................4-15
4.7.5.2 Removing the HDD.......................................................................................................................................................................................4-15
4.7.5.3 After Replacing the HDD..............................................................................................................................................................................4-15
4.7.6 Video PCB ................................................................................................................................................................................. 4-15
4.7.6.1 Before Removing the Video PCB .................................................................................................................................................................4-15
4.7.6.2 Removing the Video PCB.............................................................................................................................................................................4-15
4.7.7 Controller Fan ............................................................................................................................................................................ 4-16
4.7.7.1 Before Removing the Controller Cooling Fan ..............................................................................................................................................4-16
4.7.7.2 Removing the Controller Cooling Fan..........................................................................................................................................................4-16
Contents