Canon iR1020 Series, Service Manual

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Contents
Chapter 3
Basic Operation
3.1 Construction ............................................................................................................................................... 3- 1
3.1.1 Functional Construction ...........................................................................................................................................3- 1
3.1.2 Functional Block Diagram ........................................................................................................................................3- 2
3.1.3 Image Processor PCB .............................................................................................................................................3- 2
3.1.4
DC Controller PCB...................................................................................................................................................3- 3
3.1.5
Analog Processor PCB ............................................................................................................................................3- 4
3.1.6 Power Supply PCB ..................................................................................................................................................3- 4
3.1.7 Relay PCB ...............................................................................................................................................................3- 4
3.1.8 Control Panel PCB...................................................................................................................................................3- 4
3.1.9
NCU PCB (if equipped with fax functions) ...............................................................................................................3- 4
3.1.10
Network PCB (if equipped with network functions) ................................................................................................3- 4
3.1.11 Modular Jack PCB (if equipped with fax functions)................................................................................................3- 4
3.1.12 Modem PCB (if equipped with fax functions) .........................................................................................................3- 4
3.2
Basic Sequence ......................................................................................................................................... 3- 6
3.2.1 Basic Sequence .......................................................................................................................................................3- 6
Chapter 4 Original Exposure System
4.1
Construction ............................................................................................................................................... 4- 1
4.1.1 Specifications, Control Methods, and Functions......................................................................................................4- 1
4.1.2
Major Components...................................................................................................................................................4- 1
4.2
Basic Sequence ......................................................................................................................................... 4- 3
4.2.1
Basic Sequence at Power-on...................................................................................................................................4- 3
4.2.2
Basic Sequence after Depression of Start Key (Book mode, One Sheet of original) ..............................................4- 3
4.2.3 Basic Sequence after Depression of Start Key (ADF Mode, One Sheet of Original)...............................................4- 4
4.3 Various Control........................................................................................................................................... 4- 4
4.3.1 Enlargement/Reduction ...........................................................................................................................................4- 4
4.3.1.1 Magnification Change in Vertical Scan Direction ..................................................................................................................... 4- 4
4.3.1.2
Magnification Change in Horizontal Scan Direction................................................................................................................. 4- 4
4.3.2 Dirt Sensor Control ..................................................................................................................................................4- 5
4.3.2.1 Outline...................................................................................................................................................................................... 4- 5
4.4 Parts Replacement Procedure ................................................................................................................... 4- 7
4.4.1 Copyboard glass ......................................................................................................................................................4- 7
4.4.1.1 Removing the Copyboard Glass .............................................................................................................................................. 4- 7
4.4.1.2
Procedure after Replacing the Copyboard Glass (equipped with SEND functions) ................................................................ 4- 7
4.4.2 Reader Controller PCB ............................................................................................................................................4- 7
4.4.2.1
Removing the Analog Processor PCB ..................................................................................................................................... 4- 7
4.4.3 Scanner Motor .........................................................................................................................................................4- 7
4.4.3.1 Removing the Reader Motor.................................................................................................................................................... 4- 7
4.4.4 Contact sensor.........................................................................................................................................................4- 8
4.4.4.1 Removing the Contact Image Sensor ...................................................................................................................................... 4- 8
4.4.4.2
Procedure after Replacing the CS ........................................................................................................................................... 4- 8
4.4.5
Contact Sensor HP Sensor......................................................................................................................................4- 8
4.4.5.1
Removing the Contact Sensor Home Position Sensor ............................................................................................................ 4- 8
Chapter 5 Laser Exposure
5.1
Construction ............................................................................................................................................... 5- 1
5.1.1 Specifications and Control Mechanism....................................................................................................................5- 1
5.1.2 Main Components....................................................................................................................................................5- 2
5.2
Parts Replacement Procedure ................................................................................................................... 5- 3
5.2.1 Laser Scanner Unit ..................................................................................................................................................5- 3
5.2.1.1 Removing the Laser Scanner Unit .......................................................................................................................................... 5- 3
Chapter 6
Image Formation