Canon imageRUNNERC1022 Service Manual page 137

Contents
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
5.2.3 Basic Sequence of Operation in Response to a Press on the Start Key (book) ........................................................................... 5-5
5.3 Various Control..............................................................................................................................................................5-6
5.3.1 Lamp Control ............................................................................................................................................................................... 5-6
5.3.1.1 Overview .........................................................................................................................................................................................................5-6
5.3.2 Enlargement/Reduction................................................................................................................................................................ 5-7
5.3.2.1 Overview .........................................................................................................................................................................................................5-7
5.3.3 Detecting the Size of Originals .................................................................................................................................................... 5-7
5.3.3.1 Overview .........................................................................................................................................................................................................5-7
5.3.4 Dirt Sensor Control ...................................................................................................................................................................... 5-8
5.3.4.1 Overview .........................................................................................................................................................................................................5-8
5.3.4.2 Stream Reading Position Shift ........................................................................................................................................................................5-8
5.4 Parts Replacement Procedure.........................................................................................................................................5-9
5.4.1 ADF Unit + Reader Unit.............................................................................................................................................................. 5-9
5.4.1.1 Before Removing the ADF Unit + Reader Unit..............................................................................................................................................5-9
5.4.1.2 Removing the ADF Unit + Reader Unit .........................................................................................................................................................5-9
5.4.1.3 Procedure after Replacing the ADF Unit ......................................................................................................................................................5-11
5.4.1.4 Procedure after Replacing the Reader Unit...................................................................................................................................................5-11
5.4.2 Reader Unit ................................................................................................................................................................................ 5-11
5.4.2.1 Before Removing the Reader Unit ................................................................................................................................................................5-11
5.4.2.2 Removing the Reader Unit............................................................................................................................................................................5-11
5.4.2.3 Procedure after Replacing the Reader Unit...................................................................................................................................................5-12
Contents