Canon iR C1020 Series Service Manual page 9

4.4 Image Data Flow ........................................................................................................................................4- 9
4.4.1 Flow of Image Data According to Copy Functions .................................................................................................. 4- 9
4.4.2 Flow of Image Data for the SEND Function .......................................................................................................... 4- 10
4.4.3 Flow of Image Data for the Fax Transmission....................................................................................................... 4- 10
4.4.4 Flow of Image Data for the Fax Reception Function ............................................................................................. 4- 11
4.4.5 Flow of Image Data for the PDL Function ............................................................................................................. 4- 11
4.5 Parts Replacement Procedure .................................................................................................................4- 12
4.5.1 Main Controller PCB.............................................................................................................................................. 4- 12
4.5.1.1 Before Removing the Main Controller PCB ........................................................................................................................... 4- 12
4.5.1.2 Removing the Main Controller PCB ....................................................................................................................................... 4- 12
4.5.1.3 Procedure after Replacing the Main Controller PCB ............................................................................................................. 4- 12
Chapter 5 Original Exposure System
5.1 Basic Construction......................................................................................................................................5- 1
5.1.1 Overview.................................................................................................................................................................. 5- 1
5.1.2 Major Components .................................................................................................................................................. 5- 1
5.2 Basic Sequence..........................................................................................................................................5- 3
5.2.1 Basic Sequence of Operation at Power-on ............................................................................................................. 5- 3
5.2.2 Basic Sequence of Operation in Response to a Press on the Start Key (book)...................................................... 5- 4
5.3 Various Control ...........................................................................................................................................5- 5
5.3.1 Lamp Control ........................................................................................................................................................... 5- 5
5.3.1.1 Overview .................................................................................................................................................................................. 5- 5
5.3.2 Enlargement/Reduction ........................................................................................................................................... 5- 5
5.3.2.1 Overview .................................................................................................................................................................................. 5- 5
5.3.3 Detecting the Size of Originals ................................................................................................................................ 5- 6
5.3.3.1 Overview .................................................................................................................................................................................. 5- 6
5.3.4 Dirt Sensor Control .................................................................................................................................................. 5- 7
5.3.4.1 Overview .................................................................................................................................................................................. 5- 7
5.3.4.2 Stream Reading Position Shift ................................................................................................................................................. 5- 7
5.4 Parts Replacement Procedure ...................................................................................................................5- 8
5.4.1 ADF Unit + Reader Unit........................................................................................................................................... 5- 8
5.4.1.1 Before Removing the ADF Unit + Reader Unit ........................................................................................................................ 5- 8
5.4.1.2 Removing the ADF Unit + Reader Unit .................................................................................................................................... 5- 8
5.4.1.3 Procedure after Replacing the ADF Unit................................................................................................................................ 5- 10
5.4.1.4 Procedure after Replacing the Reader Unit ........................................................................................................................... 5- 10
5.4.2 Reader Unit ........................................................................................................................................................... 5- 10
5.4.2.1 Before Removing the Reader Unit ......................................................................................................................................... 5- 10
5.4.2.2 Removing the Reader Unit..................................................................................................................................................... 5- 10
5.4.2.3 Procedure after Replacing the Reader Unit ........................................................................................................................... 5- 11
Chapter 6 Original Feeding System
6.1 Basic Construction......................................................................................................................................6- 1
6.1.1 Overview.................................................................................................................................................................. 6- 1
6.2 Basic Operation ..........................................................................................................................................6- 3
6.2.1 Operation Mode....................................................................................................................................................... 6- 3
6.2.2 Document Size Detection ........................................................................................................................................ 6- 5
6.3 Detection Jams ...........................................................................................................................................6- 6
6.3.1 Overview.................................................................................................................................................................. 6- 6
6.4 ADF/DADF..................................................................................................................................................6- 7
6.4.1 ADF/DADF............................................................................................................................................................... 6- 7
6.4.1.1 Removing the ADF unit............................................................................................................................................................ 6- 7
6.4.1.2 Procedure after Replacing the ADF Unit.................................................................................................................................. 6- 8
6.4.2 Pickup Feed Unit ..................................................................................................................................................... 6- 8
6.4.2.1 Removing the ADF Pickup Feed Unit ...................................................................................................................................... 6- 8
6.4.3 Pick-up Roller ........................................................................................................................................................ 6- 10
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