Canon IMAGERUNNER 7105, Руководство по обслуживанию, Страница: 5 / 21

Contents
6.3
Various Controls
............................................................................................................................................. 6- 3
6.3.1
Controlling the Laser Activation Timing
................................................................................................ 6- 3
6.3.1.1
Turning On and Off the Laser Unit
................................................................................................. 6- 3
6.3.1.2 Flow of the BD Signal ....................................................................................................................... 6- 4
6.3.2 Controlling the Intensity of Laser Light ................................................................................................. 6- 5
6.3.2.1 APC Control ....................................................................................................................................... 6- 5
6.3.3
Controlling the Laser Scanner Motor
.................................................................................................... 6- 6
6.3.3.1 Outline ................................................................................................................................................ 6- 6
6.3.4 Controlling the Laser Shutter .................................................................................................................. 6- 7
6.3.4.1 Controlling the Laser Shutter .......................................................................................................... 6- 7
6.4 Parts Replacement Procedure ..................................................................................................................... 6- 8
6.4.1 Laser Scanner Unit .................................................................................................................................. 6- 8
Chapter 7 Image Formation
7.1
Construction
..................................................................................................................................................... 7- 1
7.1.1
Outline
....................................................................................................................................................... 7- 1
7.1.2
Major Components
.................................................................................................................................. 7- 1
7.1.3
Pre-Transfer Exposure LED
................................................................................................................... 7- 2
7.2
Image Formation Process
............................................................................................................................. 7- 2
7.2.1
Overview
................................................................................................................................................... 7- 2
7.3
Basic Sequence
.............................................................................................................................................. 7- 3
7.3.1
Basic Sequence
....................................................................................................................................... 7- 3
7.4
Potential Control
............................................................................................................................................. 7- 4
7.4.1
Outline
....................................................................................................................................................... 7- 4
7.4.2
Basics Sequence of Operations
............................................................................................................ 7- 5
7.4.3
Determining the Optimum Grid Bias
..................................................................................................... 7- 6
7.4.4
Grid Bias Corrective Control
.................................................................................................................. 7- 6
7.4.5
Determining the Optimum Laser Output
.............................................................................................. 7- 7
7.4.6
Laser Output Corrective Control
............................................................................................................ 7- 7
7.4.7
Determining the Optimum Developing Bias
........................................................................................ 7- 8
7.4.8
Potential Control for Transparency Mode
............................................................................................ 7- 9
7.4.9
Target Potential Correction in Each Mode
......................................................................................... 7- 10
7.5
Charging Mechanism
................................................................................................................................... 7- 12
7.5.1
Primary Charging Mechanism
.............................................................................................................. 7- 12
7.5.1.1
Outline
.............................................................................................................................................. 7- 12
7.5.1.2
Primary Charging Assembly Cleaning Mechanism
................................................................... 7- 13
7.5.1.3
Others
............................................................................................................................................... 7- 13
7.5.2
Dust-Collecting Roller Bias
................................................................................................................... 7- 14
7.5.2.1
Outline
.............................................................................................................................................. 7- 14
7.5.3
Pre-Transfer Charging Mechanism
..................................................................................................... 7- 15
7.5.3.1
Outline
.............................................................................................................................................. 7- 15
7.5.3.2
Controlling the Output to Suit the Environment (fuzzy control)
............................................... 7- 16
7.5.3.3
Pre-Transfer Charging Assembly Cleaning Mechanism
.......................................................... 7- 16
7.5.3.4
Others
............................................................................................................................................... 7- 17
7.6
Drum Cleaner Unit
........................................................................................................................................ 7- 17
7.6.1
Outline
..................................................................................................................................................... 7- 17
7.6.2
Detecting the Waste Toner (case full condition)
............................................................................... 7- 18
7.7
Developing Assembly
................................................................................................................................... 7- 19