Canon IR6570 Series Service Manual page 9

Chapter 3 Basic Operation
3.1 Construction ...................................................................................................................................................... 3- 1
3.1.1Functional Construction .............................................................................................................................. 3- 1
3.1.2Wiring Diagram of the Major PCBs............................................................................................................ 3- 1
3.1.3Controlling the Main Motor (M2) ............................................................................................................... 3- 2
3.2 Basic Sequence.................................................................................................................................................. 3- 4
3.2.1Basic Sequence of Operation (at power-on; 30-sec start-up mode) ............................................................ 3- 4
3.2.2Basic Sequence of Operation (at power-on; low-temperature start-up mode) ............................................ 3- 5
3.2.3Basic Sequence of Operation (at power-on; high-humidity start-up mode) ............................................... 3- 6
3.2.4Basic Sequence of Operation (at time of copying/printing)........................................................................ 3- 7
Chapter 4 Main Controller
4.1 Construction ...................................................................................................................................................... 4- 1
4.1.1Construction and Mechanisms .................................................................................................................... 4- 1
4.2 Construction of the Electrical Circuitry ............................................................................................................ 4- 3
4.2.1Main Controller PCB................................................................................................................................... 4- 3
4.2.2HDD ............................................................................................................................................................ 4- 4
4.3 Start-Up Sequence............................................................................................................................................. 4- 7
4.3.1Overview ..................................................................................................................................................... 4- 7
4.3.2Start-Up Sequence ....................................................................................................................................... 4- 7
4.4 Shut-Down Sequence ...................................................................................................................................... 4- 10
4.4.1Overview ................................................................................................................................................... 4- 10
4.4.2Flow of Operation ..................................................................................................................................... 4- 10
4.5 Image Processing............................................................................................................................................. 4- 11
4.5.1Overview of the Image Flow..................................................................................................................... 4- 11
4.5.2Construction of the Image Processing Module ......................................................................................... 4- 11
4.5.3Reader Unit Input Image Processing......................................................................................................... 4- 12
4.5.4Compression/ Extension/ Editing Block .................................................................................................. 4- 13
4.5.5Printer unit Output Image Processing ....................................................................................................... 4- 14
4.6 Flow of Image Data ......................................................................................................................................... 4- 15
4.6.1Flow of Image Data According to Copy Functions .................................................................................. 4- 15
4.6.2Flow of Image Data for the Box Function ................................................................................................ 4- 15
4.6.3Flow of Image Data for the SEND Function............................................................................................. 4- 16
4.6.4Flow of Image Data for the Fax Transmission.......................................................................................... 4- 17
4.6.5Flow of Image Data for the Fax Reception Function ................................................................................ 4- 17
4.6.6Flow of Image Data for the PDL Function................................................................................................ 4- 18
4.7 Parts Replacement Procedure.......................................................................................................................... 4- 20
4.7.1 Main Controller Box ................................................................................................................................. 4- 20
4.7.1.1 Removing the Rear Cover (upper) .................................................................................................... 4- 20
4.7.1.2 Removing the Main Controller Box .................................................................................................. 4- 20
4.7.2 Main Controller PCB ................................................................................................................................ 4- 21
4.7.2.1 Removing the Main Controller PCB ................................................................................................. 4- 21
4.7.2.2 After Replacing the Main Controller PCB ........................................................................................ 4- 23
4.7.3 SDRAM .................................................................................................................................................... 4- 23
4.7.3.1 Removing the SDRAM ..................................................................................................................... 4- 23
4.7.4 Boot ROM................................................................................................................................................. 4- 23
4.7.4.1 Removing the Boot ROM.................................................................................................................. 4- 23
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