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Contents
Chapter 3
Main Controller
3.1
Construction ...............................................................................................................................................3- 1
3.1.1
Construction and Mechanisms ................................................................................................................................ 3- 1
3.2
Construction of the Electrical Circuitry........................................................................................................3- 1
3.2.1
Image Processor PCB ............................................................................................................................................. 3- 1
3.3
Image Processing .......................................................................................................................................3- 2
3.3.1
Overview of the Image Flow .................................................................................................................................... 3- 2
3.3.2
Construction of the Image Processing Module........................................................................................................ 3- 3
3.3.3
Reader Unit Input Image Processing....................................................................................................................... 3- 3
3.3.4
Compressio/ Extesion/ Editing Block ...................................................................................................................... 3- 4
3.3.5
Printer unit Output Image Processing...................................................................................................................... 3- 4
3.4
Flow of Image Data ....................................................................................................................................3- 5
3.4.1
Flow of Image Data According to Copy Functions .................................................................................................. 3- 5
3.4.2
Flow of Image Data for the SEND Function ............................................................................................................ 3- 5
3.4.3
Flow of Image Data for the Fax Transmission......................................................................................................... 3- 6
3.4.4
Flow of Image Data for the Fax Reception Function ............................................................................................... 3- 6
3.4.5
Flow of Image Data for the PDL Function ............................................................................................................... 3- 7
3.5
Parts Replacement Procedure ...................................................................................................................3- 8
3.5.1
Main Controller PCB ................................................................................................................................................ 3- 8
3.5.1.1
Preparation for Removing the Image Processor PCB ............................................................................................................. 3- 8
3.5.1.2
Removing the Image Processor PCB ...................................................................................................................................... 3- 8
3.5.1.3
Procedure after Replacing the Image Processor PCB........................................................................................................... 3- 10
3.5.2
SDRAM.................................................................................................................................................................. 3- 10
3.5.2.1
Preparation for Removing the SDRAM .................................................................................................................................. 3- 10
3.5.2.2
Removing the SDRAM........................................................................................................................................................... 3- 11
Chapter 4
Original Exposure System
4.1
Construction ...............................................................................................................................................4- 1
4.1.1
Specifications, Control Methods, and Functions (iR2030i/iR2030/iR2025i/iR2025/iR2022i/iR2022) ...................... 4- 1
4.1.2
Specifications, Control Methods, and Functions (iR2018i/iR2018) ......................................................................... 4- 1
4.1.3
Major Components (iR2030i/iR2030/iR2025i/iR2025/iR2022i/iR2022) ................................................................... 4- 2
4.1.4
Major Components (iR2018i/iR2018) ...................................................................................................................... 4- 3
4.1.5
Control System Configuration (iR2030i/iR2030/iR2025i/iR2025/iR2022i/iR2022) .................................................. 4- 3
4.1.6
Control System Configuration (iR2018i/iR2018)...................................................................................................... 4- 4
4.1.7
Reader Controller PCB (iR2030i/iR2030/iR2025i/iR2025/iR2022i/iR2022)............................................................. 4- 5
4.1.8
Reader Controller PCB (iR2018i/iR2018) ................................................................................................................ 4- 5
4.2
Basic Sequence..........................................................................................................................................4- 6
4.2.1
Basic Sequence at Power-on .................................................................................................................................. 4- 6
4.2.2
Basic Sequence after Depression of Start Key (Book mode, One Sheet of original) .............................................. 4- 7
4.2.3
Basic Sequence after Depression of Start Key (ADF Mode, One Sheet of Original) .............................................. 4- 7
4.3
Various Control ...........................................................................................................................................4- 8
4.3.1
Controlling the Scanner Drive System..................................................................................................................... 4- 8
4.3.1.1
Outline...................................................................................................................................................................................... 4- 8
4.3.1.2
Reader Motor Control .............................................................................................................................................................. 4- 9
4.3.2
Contact Image Sensor (CIS) ................................................................................................................................... 4- 9
4.3.2.1
Outline...................................................................................................................................................................................... 4- 9
4.3.2.2
Analog Control Performed by the CIS (iR2022i/iR2022/iR2018i/iR2018) .............................................................................. 4- 10
4.3.2.3
Analog Control Performed by the CIS (iR2030i/iR2030/iR2025i/iR2025/iR2022i/iR2022) .................................................... 4- 11
4.3.3
Enlargement/Reduction ......................................................................................................................................... 4- 11
4.3.3.1
Magnification Change in Vertical Scan Direction ................................................................................................................... 4- 11
4.3.3.2
Magnification Change in Horizontal Scan Direction ............................................................................................................... 4- 11
4.3.4
Detecting the Size of Originals .............................................................................................................................. 4- 11
4.3.4.1
Outline.................................................................................................................................................................................... 4- 11
4.3.4.2
Outline of Original Size Detection .......................................................................................................................................... 4- 12
4.3.5
Dirt Sensor Control ................................................................................................................................................ 4- 13
Содержание iR2030
Страница 1: ...Aug 8 2007 Service Manual iR2030 2025 2022 2018 Series ...
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Страница 21: ...Chapter 1 Introduction ...
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Страница 69: ...Chapter 2 Installation ...
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Страница 127: ...Chapter 3 Main Controller ...
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Страница 143: ...Chapter 4 Original Exposure System ...
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Страница 171: ...Chapter 5 Laser Exposure ...
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Страница 181: ...Chapter 6 Image Formation ...
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Страница 269: ...Chapter 11 Maintenance and Inspection ...
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Страница 283: ...Chapter 13 Correcting Faulty Images ...
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Страница 411: ...Chapter 17 Service Tools ...
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Страница 413: ...Contents Contents 17 1 Service Tools 17 1 17 1 1 Special Tools 17 1 17 1 2 Oils and Solvents 17 1 ...
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Страница 417: ...Aug 8 2007 ...
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