Canon iR6570 series Service Manual

Also see for iR5570 Series: INSTALLATION PROCEDURE General Timing Chart/General Circuit Diagram Service bulletin Service bulletin Service bulletin

Contents

Contents4.2 Construction of the Electrical Circuitry........................................................................................................4- 24.2.1 Main Controller PCB................................................................................................................................................ 4- 24.2.2 HDD......................................................................................................................................................................... 4- 24.3 Start-Up Sequence .....................................................................................................................................4- 54.3.1 Overview.................................................................................................................................................................. 4- 54.3.2 Start-Up Sequence .................................................................................................................................................. 4- 54.4 Shut-Down Sequence.................................................................................................................................4- 84.4.1 Overview.................................................................................................................................................................. 4- 84.4.2 Flow of Operation .................................................................................................................................................... 4- 84.5 Image Processing .......................................................................................................................................4- 94.5.1 Overview of the Image Flow .................................................................................................................................... 4- 94.5.2 Construction of the Image Processing Module........................................................................................................ 4- 94.5.3 Reader Unit Input Image Processing..................................................................................................................... 4- 104.5.4 Compression/ Extension/ Editing Block................................................................................................................ 4- 114.5.5 Printer unit Output Image Processing.................................................................................................................... 4- 114.6 Flow of Image Data ..................................................................................................................................4- 124.6.1 Flow of Image Data According to Copy Functions ................................................................................................ 4- 124.6.2 Flow of Image Data for the Box Function .............................................................................................................. 4- 124.6.3 Flow of Image Data for the SEND Function .......................................................................................................... 4- 134.6.4 Flow of Image Data for the Fax Transmission....................................................................................................... 4- 134.6.5 Flow of Image Data for the Fax Reception Function ............................................................................................. 4- 144.6.6 Flow of Image Data for the PDL Function ............................................................................................................. 4- 154.7 Parts Replacement Procedure .................................................................................................................4- 164.7.1 Main Controller Box ............................................................................................................................................... 4- 164.7.1.1 Removing the Rear Cover (upper)......................................................................................................................................... 4- 164.7.1.2 Removing the Main Controller Box ........................................................................................................................................ 4- 164.7.2 Main Controller PCB.............................................................................................................................................. 4- 174.7.2.1 Removing the Main Controller PCB ....................................................................................................................................... 4- 174.7.2.2 After Replacing the Main Controller PCB............................................................................................................................... 4- 184.7.3 SDRAM.................................................................................................................................................................. 4- 184.7.3.1 Removing the SDRAM........................................................................................................................................................... 4- 184.7.4 Boot ROM.............................................................................................................................................................. 4- 184.7.4.1 Removing the Boot ROM ....................................................................................................................................................... 4- 184.7.5 HDD....................................................................................................................................................................... 4- 194.7.5.1 Removing the HDD ................................................................................................................................................................ 4- 194.7.5.2 After Replacing the HDD........................................................................................................................................................ 4- 194.7.6 Controller Fan........................................................................................................................................................ 4- 194.7.6.1 Removing the Controller Cooling Fan.................................................................................................................................... 4- 19Chapter 5 Original Exposure System5.1 Construction ...............................................................................................................................................5- 15.1.1 Specifications, Controls, and Functions .................................................................................................................. 5- 15.1.2 Major Components .................................................................................................................................................. 5- 15.1.3 Construction of the Control System......................................................................................................................... 5- 35.1.4 Reader Controller PCB............................................................................................................................................ 5- 35.2 Basic Sequence..........................................................................................................................................5- 55.2.1 Basic Sequence of Operations ................................................................................................................................ 5- 55.2.2 Basic Sequence of Operation in Response to a Press on the Start Key................................................................. 5- 55.3 Various Control ...........................................................................................................................................5- 65.3.1 Controlling the Scanner Drive System..................................................................................................................... 5- 65.3.1.1 Overview .................................................................................................................................................................................. 5- 65.3.1.2 Controlling the Scanner Motor ................................................................................................................................................. 5- 65.3.2 Enlargement/Reduction ........................................................................................................................................... 5- 75.3.2.1 Changing the Magnification in Main Scanning Direction.......................................................................................................... 5- 75.3.2.2 Changing the Magnification in Sub Scanning Direction ........................................................................................................... 5- 75.3.3 Controlling the Scanning Lamp ............................................................................................................................... 5- 8