Canon iR1600 Series Service Manual page 14

CONTENTS
5.2 CS Unit .................................... 3-23
5.2.1 Removing the CS Unit ...... 3-23
5.2.2 Points to Note When
Mounting the CS Unit ....... 3-26
5.2.3 After Replacing the
CS Unit .............................. 3-28
CHAPTER 4 LASER EXPOSURE SYSTEM
1 Outline of Operation .......................... 4-1
1.1 Outline ....................................... 4-1
1.2 Basic Sequence of Operation
(laser exposure system) ............. 4-3
2 Generating the Horizontal Signal ...... 4-4
2.1 Outline ....................................... 4-4
2.2 Signals Used .............................. 4-4
3 Laser Driver Circuit ........................... 4-6
3.1 Laser Control ............................. 4-6
CHAPTER 5 IMAGE FORMATION SYSTEM
1 Outline of Processes ........................... 5-1
1.1 Sequence of Operation
(image formation system) ......... 5-3
2 1 Controlling the Primary Charging
Roller Bias .......................................... 5-4
2.1 Outline ....................................... 5-4
2.2 Turning On and Off the Bias ..... 5-5
2.2.1 DC Bias ............................... 5-5
2.2.2 AC Bias ............................... 5-5
2.3 Bias Constant Voltage/
Constant Current Control .......... 5-5
2.3.1 DC Bias Constant Voltage
Control ................................. 5-5
2.3.2 AC Bias Constant Current
Control ................................. 5-5
3 Controlling the Developing Bias ....... 5-6
3.1 Outline ....................................... 5-6
3.2 Turning On/Off the Bias ........... 5-7
3.2.1 DC Bias ............................... 5-7
3.2.2 AC Bias ............................... 5-7
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COPYRIGHT © 2002 CANON INC.
5.2.4
5.3 Reader Motor ........................... 3-30
5.3.1
5.3.2
4 Controlling the Scanner Motor .......... 4-8
4.1 Outline ....................................... 4-8
4.2 Controlling the Scanner
Motor ......................................... 4-8
4.3 Scanner Pre-Rotation ................ 4-9
5 Disassembly and Assembly ............. 4-10
5.1 Removing the Laser/
Scanner Unit ............................ 4-11
3.3 Controlling the Bias to a
Constant Voltage Level .............. 5-7
3.3.1
3.3.2
3.4 Controlling the Voltage Level of
the Developing DC Bias ............ 5-7
4 Controlling the Transfer
Charging Roller Bias .......................... 5-8
4.1 Outline ....................................... 5-8
4.2 Turning On and Off the Bias ..... 5-9
4.2.1
4.2.2
4.3 Controlling the Bias to a Constant
Current /Voltage Level .............. 5-9
2001 2001 CANON iR1600/iR2000/iR1610/iR2010 SERIES REV.0 MAR. 2002
Points to Note When
Handling the CS Unit ........ 3-29
Removing the Reader
Motor ................................. 3-30
Points to Note When Mounting
the Reader Motor .............. 3-31
Controlling the Developing
DC Bias to a Constant
Level .................................... 5-7
Controlling the Developing
AC Bias to a Constant
Voltage Level ....................... 5-7
Turning On and Off the
Positive DC Bias ................. 5-9
Turning On and Off the
Negative DC Bias ................ 5-9