Sep 5 2005 Service Manual iR C6800 Series
Welcome message from author
This document is posted to help you gain knowledge. Please leave a comment to let me know what you think about it! Share it to your friends and learn new things together.
Transcript
Service ManualiR C6800 Series
Sep 5 2005
ApplicationThis manual has been issued by Canon Inc. for qualified persons to learn technical theory, installation, maintenance, and repair of products. This manual covers all localities where the products are sold. For this reason, there may be information in this manual that does not apply to your locality.
CorrectionsThis manual may contain technical inaccuracies or typographical errors due to improvements or changes in products. When changes occur in applicable products or in the contents of this manual, Canon will release technical information as the need arises. In the event of major changes in the contents of this manual over a long or short period, Canon will issue a new edition of this manual. The following paragraph does not apply to any countries where such provisions are inconsistent with local law.
TrademarksThe product names and company names used in this manual are the registered trademarks of the individual companies.
CopyrightThis manual is copyrighted with all rights reserved. Under the copyright laws, this manual may not be copied, reproduced or translated into another language, in whole or in part, without the written consent of Canon Inc.
COPYRIGHT 2001 CANON INC.Printed in Japan
CautionUse of this manual should be strictly supervised to avoid disclosure of confidential information.
Introduction
Symbols UsedThis documentation uses the following symbols to indicate special information:
Symbol
DescriptionIndicates an item of a non-specific nature, possibly classified as Note, Caution, or Warning.
Indicates an item requiring care to avoid electric shocks.
Indicates an item requiring care to avoid combustion (fire).
Indicates an item prohibiting disassembly to avoid electric shocks or problems.
Indicates an item requiring disconnection of the power plug from the electric outlet.
Indicates an item intended to provide notes assisting the understanding of the topic in question.Memo
Indicates an item of reference assisting the understanding of the topic in question.REF.
Provides a description of a service mode.
Provides a description of the nature of an error indication.
Introduction The following rules apply throughout this Service Manual: 1. Each chapter contains sections explaining the purpose of specific functions and the relationship between electrical and mechanical systems with reference to the timing of operation. In the diagrams, represents the path of mechanical drive; where a signal name accompanies the symbol , the arrow indicates the direction of the electric signal. The expression "turn on the power" means flipping on the power switch, closing the front door, and closing the delivery unit door, which results in supplying the machine with power. 2. In the digital circuits, '1'is used to indicate that the voltage level of a given signal is "High", while '0' is used to indicate "Low".(The voltage value, however, differs from circuit to circuit.) In addition, the asterisk (*) as in "DRMD*" indicates that the DRMD signal goes on when '0'. In practically all cases, the internal mechanisms of a microprocessor cannot be checked in the field. Therefore, the operations of the microprocessors used in the machines are not discussed: they are explained in terms of from sensors to the input of the DC controller PCB and from the output of the DC controller PCB to the loads. The descriptions in this Service Manual are subject to change without notice for product improvement or other purposes, and major changes will be communicated in the form of Service Information bulletins. All service persons are expected to have a good understanding of the contents of this Service Manual and all relevant Service Information bulletins and be able to identify and isolate faults in the machine."
Contents
ContentsChapter 1 Introduction1.1 System Construction ...................................................................................................................................... 1- 1 1.1.1 System Configuration with Pickup/Delivery Accessories .................................................................. 1- 1 1.1.2 System Configuration with Printing/Transmission Accessories ....................................................... 1- 1 1.1.3 Functions of Printing/Transmitting Accessories.................................................................................. 1- 2 1.2 Product Specifications ................................................................................................................................... 1- 2 1.2.1 Names of Parts ......................................................................................................................................... 1- 2 1.2.1.1 External View..................................................................................................................................... 1- 2 1.2.1.2 Cross Section .................................................................................................................................... 1- 3 1.2.2 Using the Machine ................................................................................................................................... 1- 5 1.2.2.1 Turning On the Power Switch ......................................................................................................... 1- 5 1.2.2.2 Points to Note About Turing Off the Main Power Switch............................................................ 1- 5 1.2.2.3 Control Panel..................................................................................................................................... 1- 7 1.2.3 User Mode Items ...................................................................................................................................... 1- 7 1.2.3.1 Common Settings ............................................................................................................................. 1- 7 1.2.3.2 Setting the Timers............................................................................................................................. 1- 8 1.2.3.3 Adjustment and Cleaning ............................................................................................................... 1- 8 1.2.3.4 Report ................................................................................................................................................. 1- 9 1.2.3.5 System Control Settings .................................................................................................................. 1- 9 1.2.3.6 Copier Settings.................................................................................................................................. 1- 9 1.2.3.7 Common Transmission Settings .................................................................................................. 1- 10 1.2.3.8 Box Settings..................................................................................................................................... 1- 10 1.2.3.9 Printer Settings................................................................................................................................ 1- 10 1.2.3.10 Address Book Settings................................................................................................................. 1- 11 1.2.4 User Maintenance .................................................................................................................................. 1- 11 1.2.4.1 Cleaning ........................................................................................................................................... 1- 11 1.2.4.2 Inspection......................................................................................................................................... 1- 12 1.2.5 Safety ....................................................................................................................................................... 1- 13 1.2.5.1 Safety of the Laser Light................................................................................................................ 1- 13 1.2.5.2 Regulations by the us Center for Devices and Radiological Health ....................................... 1- 13 1.2.5.3 Handling the Laser Unit ................................................................................................................. 1- 14 1.2.5.4 Safety of Toner................................................................................................................................ 1- 14 1.2.6 Product Specifications ........................................................................................................................... 1- 15 1.2.6.1 Specifications .................................................................................................................................. 1- 15 1.2.7 Function List ............................................................................................................................................ 1- 16 1.2.7.1 Print Speed ...................................................................................................................................... 1- 16 1.2.7.2 Print Speed ...................................................................................................................................... 1- 17 1.2.7.3 Paper Type ...................................................................................................................................... 1- 18 1.2.7.4 Accessories...................................................................................................................................... 1- 19
Chapter 2 Installation2.1 Making Pre-Checks ........................................................................................................................................ 2- 1
Contents
2.1.1 Selecting the Site of Installation............................................................................................................. 2- 1 2.1.2 Installation Environment.......................................................................................................................... 2- 2 2.1.3 Checking the Contents ............................................................................................................................ 2- 2 2.2 Unpacking and Installation ............................................................................................................................ 2- 4 2.2.1 Before Starting the Work......................................................................................................................... 2- 4 2.2.2 Unpacking the Machine........................................................................................................................... 2- 4 2.2.3 Mounting the Pickup Assembly.............................................................................................................. 2- 5 2.2.4 Mounting the Scanner System............................................................................................................... 2- 6 2.2.5 Locking the Primary Transfer Roller in Place ...................................................................................... 2- 6 2.2.6 Before Mounting the Developing Assembly......................................................................................... 2- 6 2.2.7 Mounting the Color Developing Assemblies ........................................................................................ 2- 9 2.2.8 Mounting the Black Developing Assembly......................................................................................... 2- 11 2.2.9 Mounting the Process Unit ................................................................................................................... 2- 13 2.2.10 Mounting the Fixing Assembly ........................................................................................................... 2- 15 2.2.11 Fitting the Black Toner Bottle ............................................................................................................. 2- 16 2.2.12 Checking the Environment Switch..................................................................................................... 2- 17 2.2.13 Turning On the Main Power Switch................................................................................................... 2- 17 2.2.14 Setting Up the Paper Cassette .......................................................................................................... 2- 17 2.2.15 Changing the Deck Paper Size (right, left)....................................................................................... 2- 18 2.2.16 Fitting the Color Toner Cartridge ....................................................................................................... 2- 18 2.2.17 Supplying Black Toner ........................................................................................................................ 2- 19 2.2.18 Cleaning the Intermediate Transfer Belt........................................................................................... 2- 19 2.2.19 Supplying Color Toner......................................................................................................................... 2- 19 2.2.20 Setting Auto Gradation Correction .................................................................................................... 2- 19 2.2.21 Checking the Image/Operation .......................................................................................................... 2- 19 2.2.22 Adjusting the Horizontal Registration................................................................................................ 2- 20 2.2.23 Adjusting the Leading Edge Registration ......................................................................................... 2- 21 2.2.24 Securing the Machine in Place .......................................................................................................... 2- 21 2.2.25 If Not Connected to a Network........................................................................................................... 2- 22 2.3 Checking the Connection to the Network.................................................................................................. 2- 22 2.3.1 Overview.................................................................................................................................................. 2- 22 2.3.2 Using the PING Utility............................................................................................................................ 2- 22 2.3.3 Using a Remote Host Address............................................................................................................. 2- 23 2.4 Troubleshooting the Network ...................................................................................................................... 2- 23 2.4.1 Overview.................................................................................................................................................. 2- 23 2.4.2 Checking the Connection of the Network Cable ............................................................................... 2- 23 2.4.3 Using a Loopback Address................................................................................................................... 2- 23 2.4.4 Using a Local Host Address ................................................................................................................. 2- 23 2.5 Relocating the Machine................................................................................................................................ 2- 23 2.5.1 Relocating the Machine......................................................................................................................... 2- 23 2.6 Installing the Card Reader........................................................................................................................... 2- 24 2.6.1 Points to Note About Installation ......................................................................................................... 2- 24 2.6.2 Checking the Contents .......................................................................................................................... 2- 24 2.6.3 Installation ............................................................................................................................................... 2- 25 2.6.4 Using the Card Reader in Combination with NetSpot Accountant (hereafter, NSA)................... 2- 26 2.7 Installing the NE Controller-A1.................................................................................................................... 2- 26 2.7.1 NE Controller-A1 Installation Procedure ............................................................................................ 2- 26 2.8 Installing the Original Tray........................................................................................................................... 2- 32 2.8.1 Checking the Contents .......................................................................................................................... 2- 32
Contents
2.8.2 Installation ............................................................................................................................................... 2- 32 2.9 Installing the Key Switch Unit-A1 ............................................................................................................... 2- 33 2.9.1 Checking the Contents.......................................................................................................................... 2- 33 2.9.2 Installation ............................................................................................................................................... 2- 33
Chapter 3 Basic Operation3.1 Construction..................................................................................................................................................... 3- 1 3.1.1 Functional Construction .......................................................................................................................... 3- 1 3.1.2 Arrangement of the Major PCBs ........................................................................................................... 3- 1 3.1.3 DC Controller............................................................................................................................................ 3- 2 3.2 Basic Sequence .............................................................................................................................................. 3- 3 3.2.1 Basic Sequence of Operation at Power-On ........................................................................................ 3- 3 3.2.2 Basic Sequence of Control During Printing (full-color) ...................................................................... 3- 4 3.2.3 Basic Sequence of Operation During Printing (mono color)............................................................. 3- 5
Chapter 4 Main Controller4.1 Construction..................................................................................................................................................... 4- 1 4.1.1 Functional Construction .......................................................................................................................... 4- 1 4.2 Construction of the Electrical Circuitry ........................................................................................................ 4- 1 4.2.1 Main Controller PCB (main) ................................................................................................................... 4- 1 4.2.2 Main Controller PCB (sub) ..................................................................................................................... 4- 2 4.2.3 Expansion Bus PCB ................................................................................................................................ 4- 3 4.2.4 SRAM PCB ............................................................................................................................................... 4- 3 4.2.5 HDD ........................................................................................................................................................... 4- 4 4.3 Start-Up Sequence ......................................................................................................................................... 4- 5 4.3.1 Overview ................................................................................................................................................... 4- 5 4.3.2 Start-Up Sequence .................................................................................................................................. 4- 5 4.4 Actions when HDD Error ............................................................................................................................... 4- 7 4.4.1 E602 in Detail ........................................................................................................................................... 4- 7 4.4.2 E609 in Detail ........................................................................................................................................... 4- 9 4.5 Image Processing ........................................................................................................................................... 4- 9 4.5.1 Overview of the Flow of Image Data .................................................................................................... 4- 9 4.5.2 Construction of the Image Processing Modules ............................................................................... 4- 10 4.5.3 Reader Input Image Processing.......................................................................................................... 4- 11 4.5.4 Compression/Decompression and Editing Blocks............................................................................ 4- 11 4.5.5 Printer Output Image Processing ........................................................................................................ 4- 12 4.6 Flow of Image Data ...................................................................................................................................... 4- 13 4.6.1 Flow of Image Data (copier function).................................................................................................. 4- 13 4.6.2 Flow of Image Data (Box function)...................................................................................................... 4- 14 4.6.3 Flow of Image Data (SEND function) ................................................................................................. 4- 14 4.6.4 Flow of Image Data (fax transmission)............................................................................................... 4- 15 4.6.5 Image Data Flow for Fax Reception Functions................................................................................. 4- 16 4.6.6 Flow of Image Data (PDL function)..................................................................................................... 4- 16 4.7 Parts Replacement Procedure ................................................................................................................... 4- 17 4.7.1 Controller Box ......................................................................................................................................... 4- 17 4.7.1.1 Removing the Left Cover (upper)................................................................................................. 4- 17 4.7.1.2 Removing the Delivery Cover ....................................................................................................... 4- 17
Contents
4.7.1.3 Removing the Left Cover (middle)................................................................................................ 4- 17 4.7.1.4 Removing the Rear Cover (upper) ............................................................................................... 4- 17 4.7.1.5 Removing the Controller Box Cover ............................................................................................ 4- 18 4.7.1.6 Removing the Controller Box ........................................................................................................ 4- 18 4.7.2 Main Controller PCB (main) .................................................................................................................. 4- 19 4.7.2.1 Removing the Delivery Cover ....................................................................................................... 4- 19 4.7.2.2 Removing the Left Cover (middle)................................................................................................ 4- 19 4.7.2.3 Removing the Rear Cover (upper) ............................................................................................... 4- 19 4.7.2.4 Removing the Controller Box Cover ............................................................................................ 4- 20 4.7.2.5 Removing the Main Controller PCB (main)................................................................................. 4- 20 4.7.2.6 After Replacing the Main Controller PCB (main) ....................................................................... 4- 22 4.7.3 Main Controller PCB (sub) .................................................................................................................... 4- 22 4.7.3.1 Removing the Delivery Cover ....................................................................................................... 4- 22 4.7.3.2 Removing the Left Cover (middle)................................................................................................ 4- 22 4.7.3.3 Removing the Rear Cover (upper) ............................................................................................... 4- 22 4.7.3.4 Removing the Controller Box Cover ............................................................................................ 4- 23 4.7.3.5 Removing the Main Controller PCB (sub) ................................................................................... 4- 23 4.7.4 Expansion Bus PCB ............................................................................................................................... 4- 23 4.7.4.1 Removing the Rear Cover (upper) ............................................................................................... 4- 23 4.7.4.2 Removing the Delivery Cover ....................................................................................................... 4- 23 4.7.4.3 Removing the Left Cover (middle)................................................................................................ 4- 24 4.7.4.4 Removing the Controller Box Cover ............................................................................................ 4- 24 4.7.4.5 Removing the SRAM Board .......................................................................................................... 4- 24 4.7.4.6 Removing the Expansion Bus PCB.............................................................................................. 4- 24 4.7.4.7 After Replacing the Expansion PCB ............................................................................................ 4- 24 4.7.5 SRAM PCB .............................................................................................................................................. 4- 25 4.7.5.1 Removing the Rear Cover (upper) ............................................................................................... 4- 25 4.7.5.2 Removing the Controller Box Cover ............................................................................................ 4- 25 4.7.5.3 Removing the SRAM Board .......................................................................................................... 4- 25 4.7.5.4 After Replacing the SRAM Board ................................................................................................. 4- 25 4.7.6 UFR Board ............................................................................................................................................... 4- 26 4.7.6.1 Removing the Rear Cover (upper) ............................................................................................... 4- 26 4.7.6.2 Removing the Delivery Cover ....................................................................................................... 4- 26 4.7.6.3 Removing the Left Cover (middle)................................................................................................ 4- 26 4.7.6.4 Removing the Controller Box Cover ............................................................................................ 4- 26 4.7.6.5 Removing the UFR Board.............................................................................................................. 4- 26 4.7.7 Ethernet Board ........................................................................................................................................ 4- 27 4.7.7.1 Removing the Rear Cover (upper) ............................................................................................... 4- 27 4.7.7.2 Removing the Delivery Cover ....................................................................................................... 4- 27 4.7.7.3 Removing the Left Cover (middle)................................................................................................ 4- 27 4.7.7.4 Removing the Controller Box Cover ............................................................................................ 4- 27 4.7.7.5 Removing the Ethernet Board....................................................................................................... 4- 28 4.7.8 HDD .......................................................................................................................................................... 4- 28 4.7.8.1 Removing the Rear Cover (upper) ............................................................................................... 4- 28 4.7.8.2 Removing the Controller Box Cover ............................................................................................ 4- 28 4.7.8.3 Removing the HDD ......................................................................................................................... 4- 28 4.7.8.4 After Replacing the HDD................................................................................................................ 4- 29 4.7.9 Controller Fan.......................................................................................................................................... 4- 29 4.7.9.1 Removing the Delivery Cover ....................................................................................................... 4- 29
Contents
4.7.9.2 Removing the Left Cover (middle) ............................................................................................... 4- 29 4.7.9.3 Removing the Controller Fan ........................................................................................................ 4- 30
Chapter 5 Original Exposure System5.1 Construction..................................................................................................................................................... 5- 1 5.1.1 Specifications, Control Mechanisms, and Functions ......................................................................... 5- 1 5.1.2 Major Components .................................................................................................................................. 5- 1 5.1.3 Construction of the Control System ...................................................................................................... 5- 2 5.1.4 Reader Controller PCB ........................................................................................................................... 5- 3 5.2 Basic Sequence .............................................................................................................................................. 5- 4 5.2.1 Basic Sequence of Operation at Power-On ........................................................................................ 5- 4 5.2.2 Basic Sequence of Operation in Response to a Press on the Start Key........................................ 5- 4 5.3 Various Control Mechanisms........................................................................................................................ 5- 5 5.3.1 Controlling the Scanner Drive System .................................................................................................. 5- 5 5.3.1.1 Overview ............................................................................................................................................ 5- 5 5.3.1.2 Controlling the Scanner Motor ........................................................................................................ 5- 6 5.3.2 Enlargement/Reduction........................................................................................................................... 5- 7 5.3.2.1 Changing the Magnification in Main Scanning Direction ............................................................ 5- 7 5.3.2.2 Changing the Magnification in Sub Scanning Direction ............................................................. 5- 7 5.3.3 Controlling the Scanning Lamp.............................................................................................................. 5- 7 5.3.3.1 Overview ............................................................................................................................................ 5- 7 5.3.3.2 Scanning Lamp ................................................................................................................................. 5- 7 5.3.3.3 Turning On and Off the Scanning Lamp ....................................................................................... 5- 8 5.3.4 Detecting the Size of Originals............................................................................................................... 5- 8 5.3.4.1 Identifying the Size of Originals ...................................................................................................... 5- 8 5.3.4.2 Points of Measurement Used for Original Size Identification .................................................... 5- 8 5.3.4.3 Overview of Operation ..................................................................................................................... 5- 9 5.3.5 Dirt Sensor Control................................................................................................................................. 5- 11 5.3.5.1 Stream Reading Dust Detection Control..................................................................................... 5- 11 5.3.5.2 White Plate Dust Detection Control ............................................................................................. 5- 12 5.3.6 Image Processing................................................................................................................................... 5- 13 5.3.6.1 Overview .......................................................................................................................................... 5- 13 5.3.6.2 CCD Drive ........................................................................................................................................ 5- 14 5.3.6.3 CCD Gain Correction, Offset Correction..................................................................................... 5- 14 5.3.6.4 CCD Output A/D Conversion ........................................................................................................ 5- 14 5.3.6.5 Outline of Shading Correction....................................................................................................... 5- 14 5.3.6.6 Shading Adjustment ....................................................................................................................... 5- 15 5.3.6.7 Shading Correction......................................................................................................................... 5- 15 5.4 Parts Replacement Procedure ................................................................................................................... 5- 15 5.4.1 Copyboard Glass.................................................................................................................................... 5- 15 5.4.1.1 Removing Copyboard Glass ......................................................................................................... 5- 15 5.4.2 Exposure Lamp....................................................................................................................................... 5- 15 5.4.2.1 Removing the Copyboard Glass .................................................................................................. 5- 15 5.4.2.2 Removing the Right Cover (upper) .............................................................................................. 5- 15 5.4.2.3 Removing the Reader Right Cover .............................................................................................. 5- 15 5.4.2.4 Removing the Left Cover (upper)................................................................................................. 5- 16 5.4.2.5 Removing the Reader Left Cover................................................................................................. 5- 16 5.4.2.6 Removing the Reader Front Cover .............................................................................................. 5- 16
Contents
5.4.2.7 Removing the Reader Rear Cover ............................................................................................... 5- 16 5.4.2.8 Removing the CCD Unit Cover ..................................................................................................... 5- 17 5.4.2.9 Removing the Scanning Lamp...................................................................................................... 5- 18 5.4.3 Reader Controller PCB .......................................................................................................................... 5- 18 5.4.3.1 Removing the Copyboard Glass................................................................................................... 5- 18 5.4.3.2 Removing the CCD Unit Cover ..................................................................................................... 5- 18 5.4.3.3 Removing the Original Size Sensor Unit ..................................................................................... 5- 19 5.4.3.4 Removing the Reader Controller PCB......................................................................................... 5- 19 5.4.3.5 After Replacing the Reader Controller......................................................................................... 5- 19 5.4.4 Interface PCB .......................................................................................................................................... 5- 20 5.4.4.1 Removing the Reader Rear Cover ............................................................................................... 5- 20 5.4.4.2 Removing the Interface PCB......................................................................................................... 5- 21 5.4.4.3 Points to Note When Mounting the Interface PCB .................................................................... 5- 21 5.4.5 Inverter PCB ............................................................................................................................................ 5- 22 5.4.5.1 Removing the Copyboard Glass................................................................................................... 5- 22 5.4.5.2 Removing the CCD Unit Cover ..................................................................................................... 5- 22 5.4.5.3 Removing the Inverter PCB........................................................................................................... 5- 22 5.4.5.4 After Replacing the Inverter PCB ................................................................................................. 5- 22 5.4.6 CCD Unit .................................................................................................................................................. 5- 22 5.4.6.1 Removing the Copyboard Glass................................................................................................... 5- 22 5.4.6.2 Removing the CCD Unit Cover ..................................................................................................... 5- 22 5.4.6.3 Original Size Detection Unit .......................................................................................................... 5- 23 5.4.6.4 Removing the CCD Unit................................................................................................................. 5- 23 5.4.6.5 After Replacing the CCD Unit ....................................................................................................... 5- 23 5.4.7 Scanner Motor......................................................................................................................................... 5- 24 5.4.7.1 Removing the Reader Rear Cover ............................................................................................... 5- 24 5.4.7.2 Removing the Scanner Motor ....................................................................................................... 5- 24 5.4.7.3 Mounting the Scanner Motor ......................................................................................................... 5- 25 5.4.8 ADF Open/Close Sensor ....................................................................................................................... 5- 25 5.4.8.1 Removing the Reader Rear Cover ............................................................................................... 5- 25 5.4.8.2 Removing the ADF Open/Closed Sensor ................................................................................... 5- 26 5.4.9 Scanner HP Sensor................................................................................................................................ 5- 27 5.4.9.1 Removing the Rear Cover ............................................................................................................. 5- 27 5.4.9.2 Removing the Mirror Base Home Position Sensor .................................................................... 5- 27 5.4.10 Original Sensor ..................................................................................................................................... 5- 28 5.4.10.1 Removing the Copyboard Glass................................................................................................. 5- 28 5.4.10.2 Removing the CCD Unit Cover ................................................................................................... 5- 28 5.4.10.3 Removing the Original Size Sensor Unit ................................................................................... 5- 28 5.4.10.4 Removing the Original Size Sensor ........................................................................................... 5- 29 5.4.11 Cooling Fan ........................................................................................................................................... 5- 29 5.4.11.1 Removing the Reader Rear Cover ............................................................................................. 5- 29 5.4.11.2 Removing the Cooling Fan .......................................................................................................... 5- 30 5.4.12 Scanner Drive Cable ............................................................................................................................ 5- 30 5.4.12.1 Outline............................................................................................................................................. 5- 30 5.4.12.2 Removing the Copyboard Glass................................................................................................. 5- 30 5.4.12.3 Removing the Right Cover (upper) ............................................................................................ 5- 30 5.4.12.4 Removing the Right Cover .......................................................................................................... 5- 30 5.4.12.5 Removing the Left Cover (upper) ............................................................................................... 5- 30 5.4.12.6 Removing the Reader Left Cover ............................................................................................... 5- 30
Contents
5.4.12.7 Removing the Reader Front Cover ............................................................................................ 5- 30 5.4.12.8 Removing the ADF ....................................................................................................................... 5- 31 5.4.12.9 Removing the Control Panel ....................................................................................................... 5- 31 5.4.12.10 Removing the Scanner Drive Cable ........................................................................................ 5- 32 5.4.12.11 Fitting the Scanner Drive Cable ............................................................................................... 5- 34 5.4.12.12 Adjusting the Position of the No. 1/No. 2 Mirror Base .......................................................... 5- 35
Chapter 6 Laser Exposure6.1 Construction..................................................................................................................................................... 6- 1 6.1.1 Specifications, Control Mechanisms, and Functions ......................................................................... 6- 1 6.1.2 Major Components .................................................................................................................................. 6- 1 6.1.3 Construction of the Control System ...................................................................................................... 6- 2 6.2 Basic Sequence .............................................................................................................................................. 6- 2 6.2.1 Basic Sequence of Operation ................................................................................................................ 6- 2 6.3 Various Control ............................................................................................................................................... 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 Controlling the Synchronization in Main Scanning Direction ..................................................... 6- 4 6.3.1.3 Controlling the Synchronization in Sub Scanning Direction....................................................... 6- 4 6.3.2 Controlling the Intensity of Laser Light ................................................................................................. 6- 5 6.3.2.1 APC Control....................................................................................................................................... 6- 5 6.3.2.2 PWM Control ..................................................................................................................................... 6- 5 6.3.3 Controlling the Laser Scanner Motor .................................................................................................... 6- 6 6.3.3.1 Controlling the Laser Scanner Motor............................................................................................. 6- 6 6.3.4 Controlling the Laser Shutter.................................................................................................................. 6- 6 6.3.4.1 Controlling the Laser Shutter .......................................................................................................... 6- 6 6.4 Parts Replacement Procedure ..................................................................................................................... 6- 7 6.4.1 Laser Scanner Unit .................................................................................................................................. 6- 7 6.4.1.1 Removing the Left Cover (upper)................................................................................................... 6- 7 6.4.1.2 Removing the Delivery Cover ......................................................................................................... 6- 7 6.4.1.3 Removing the Left Cover (middle) ................................................................................................. 6- 7 6.4.1.4 Removing the HV2 PCB .................................................................................................................. 6- 7 6.4.1.5 Removing the Laser Scanner Unit ................................................................................................. 6- 8 6.4.1.6 Points to Note When Replacing the Laser Scanner Unit ........................................................... 6- 8 6.4.1.7 Cleaning the Laser Scanner Unit ................................................................................................... 6- 9
Chapter 7 Image Formation7.1 Construction..................................................................................................................................................... 7- 1 7.1.1 Specifications of the Image Formation System .................................................................................. 7- 1 7.1.2 Major Components .................................................................................................................................. 7- 2 7.1.3 Charging System ..................................................................................................................................... 7- 3 7.2 Image Formation Process ............................................................................................................................. 7- 4 7.2.1 Image Formation Process ...................................................................................................................... 7- 4 7.3 Basic Sequence .............................................................................................................................................. 7- 5 7.3.1 At Time of Power-On............................................................................................................................... 7- 5 7.3.2 During Copying/Printing (normal speed).............................................................................................. 7- 5 7.3.3 During Copying/Printing (2/3 speed, 1/3 speed)................................................................................. 7- 6
Contents
7.4 Image Stabilization Control............................................................................................................................ 7- 6 7.4.1 Overview of Image Stabilization Control .............................................................................................. 7- 6 7.4.2 Timing of Image Stabilization Control ................................................................................................... 7- 7 7.4.3 Potential Control....................................................................................................................................... 7- 9 7.4.4 ATVC Control.......................................................................................................................................... 7- 11 7.4.5 ATR Control ............................................................................................................................................ 7- 13 7.4.6 ACR Control (Auto Carrier Refresh Control) ..................................................................................... 7- 15 7.4.7 D-max Control......................................................................................................................................... 7- 15 7.4.8 D-half Control.......................................................................................................................................... 7- 17 7.4.9 PASCAL control .................................................................................................................................... 7- 19 7.5 Charging Meachanism ................................................................................................................................. 7- 21 7.5.1 Controlling the Primary Charging Bias ............................................................................................... 7- 21 7.5.2 Controlling the Primary Charging Assembly Cleaning Mechanism ............................................... 7- 22 7.5.3 Controlling the Pre-Transfer Charging Bias....................................................................................... 7- 23 7.5.4 Controlling the Pre-Transfer Charging Assembly Cleaning Mechanism....................................... 7- 24 7.5.5 Pre-Exposure LED ................................................................................................................................. 7- 25 7.6 Developing Rotary ........................................................................................................................................ 7- 26 7.6.1 Overview of the Developing Rotary..................................................................................................... 7- 26 7.6.2 Controlling the Developing Rotary....................................................................................................... 7- 26 7.7 Developing Unit ............................................................................................................................................. 7- 29 7.7.1 Construction of the Color Developing Assembly............................................................................... 7- 29 7.7.2 Controlling the Color Developing Assembly Drive Mechanism ...................................................... 7- 29 7.7.3 Controlling the Color Developing Bias ................................................................................................ 7- 30 7.7.4 Color Toner Supply ................................................................................................................................ 7- 31 7.7.5 Detecting the Level of Color Toner ..................................................................................................... 7- 32 7.7.6 Construction of the Black Developing Assembly .............................................................................. 7- 34 7.7.7 Controlling the Black Developing Assembly Drive Mechanism ...................................................... 7- 34 7.7.8 Black Toner Supply................................................................................................................................ 7- 35 7.7.9 Controlling the Black Developing Bias................................................................................................ 7- 36 7.8 Transfer Device ............................................................................................................................................. 7- 37 7.8.1 Overview of the Transfer Assembly .................................................................................................... 7- 37 7.8.2 Controlling the Transfer Bias................................................................................................................ 7- 38 7.8.3 Overview of the Primary Transfer Assembly ..................................................................................... 7- 39 7.8.4 Controlling the ITB Cleaner Shifting Mechanism .............................................................................. 7- 39 7.8.5 Checking the ITB Cleaner Position ..................................................................................................... 7- 40 7.8.6 Overview of the Secondary Transfer Assembly ................................................................................ 7- 41 7.8.7 Controlling the Movement of the Secondary Transfer Roller .......................................................... 7- 42 7.8.8 Checking the Location of the Secondary Transfer Roller................................................................ 7- 43 7.8.9 Detecting the ITB Home Position ........................................................................................................ 7- 44 7.8.10 Separation ............................................................................................................................................. 7- 46 7.9 Photosensitive Drum Cleaning.................................................................................................................... 7- 46 7.9.1 Overview of the Drum Cleaning Unit................................................................................................... 7- 46 7.9.2 Controlling the Drum Cleaning Unit Drive Mechanism..................................................................... 7- 47 7.10 Waste Toner Collection Mechanism ........................................................................................................ 7- 47 7.10.1 Collection of Waste Toner .................................................................................................................. 7- 47 7.10.2 Detecting the State of the Waste Toner Bottle (full) ....................................................................... 7- 48 7.11 Parts Replacement Procedure.................................................................................................................. 7- 49 7.11.1 Process Unit .......................................................................................................................................... 7- 49 7.11.1.1 Removing the Right Cover (upper) ............................................................................................ 7- 49
Contents
7.11.1.2 Freeing the Front Cover............................................................................................................... 7- 50 7.11.1.3 Releasing the Hopper Assembly ................................................................................................ 7- 51 7.11.1.4 Removing the Pre-Transfer Charging Assembly ..................................................................... 7- 52 7.11.1.5 Removing the Transfer Cleaner Drive Assembly .................................................................... 7- 53 7.11.1.6 Removing the Intermediate Transfer Unit................................................................................. 7- 54 7.11.1.7 Cleaning the Surface of the Intermediate Transfer Unit ......................................................... 7- 55 7.11.1.8 Removing the Process Unit......................................................................................................... 7- 56 7.11.1.9 Points to Note When Mounting the Process Unit .................................................................... 7- 59 7.11.2 Pre-exposure LED Array ..................................................................................................................... 7- 59 7.11.2.1 Preventing Right Cover (upper).................................................................................................. 7- 59 7.11.2.2 Freeing the Front Cover............................................................................................................... 7- 59 7.11.2.3 Sliding Out the Process Unit ....................................................................................................... 7- 61 7.11.2.4 Releasing the Hopper Assembly ................................................................................................ 7- 64 7.11.2.5 Removing the Primary Charging Assembly.............................................................................. 7- 65 7.11.2.6 Removing the Photosensitive Drum Cleaning Unit ................................................................. 7- 66 7.11.2.7 Removing the Pre-Exposure LED Unit...................................................................................... 7- 67 7.11.3 Primary Charging Assembly ............................................................................................................... 7- 67 7.11.3.1 Removing the Right Cover (upper) ............................................................................................ 7- 67 7.11.3.2 Freeing the Front Cover............................................................................................................... 7- 67 7.11.3.3 Releasing the Hopper Assembly ................................................................................................ 7- 69 7.11.3.4 Removing the Primary Charging Assembly.............................................................................. 7- 70 7.11.4 Primary Charging Assembly Cleaning Motor................................................................................... 7- 70 7.11.4.1 Removing the Right Cover (upper) ............................................................................................ 7- 70 7.11.4.2 Freeing the Front Cover............................................................................................................... 7- 71 7.11.4.3 Releasing the Hopper Assembly ................................................................................................ 7- 72 7.11.4.4 Removing the Primary Charging Assembly.............................................................................. 7- 73 7.11.4.5 Removing the Primary Charging Wire Cleaning Motor........................................................... 7- 73 7.11.5 Pre-transfer Charging Assembly........................................................................................................ 7- 74 7.11.5.1 Removing the Pre-Transfer Charging Assembly ..................................................................... 7- 74 7.11.6 Pre-transfer Charging Assembly Cleaning Motor ........................................................................... 7- 74 7.11.6.1 Removing the Pre-Transfer Charging Assembly ..................................................................... 7- 74 7.11.6.2 Removing the Pre-Transfer Charging Wire Cleaning Motor .................................................. 7- 75 7.11.7 Photosensitive Drum Cleaning Unit................................................................................................... 7- 76 7.11.7.1 Removing the Right Cover (upper) ............................................................................................ 7- 76 7.11.7.2 Freeing the Front Cover............................................................................................................... 7- 76 7.11.7.3 Releasing the Hopper Assembly ................................................................................................ 7- 77 7.11.7.4 Sliding Out the Process Unit ....................................................................................................... 7- 79 7.11.7.5 Removing the Primary Charging Assembly.............................................................................. 7- 82 7.11.7.6 Removing the Photosensitive Drum Cleaning Unit ................................................................. 7- 82 7.11.7.7 Points to Note When Mounting the Photosensitive Drum Cleaning Unit ............................. 7- 83 7.11.8 Photosensitive Drum............................................................................................................................ 7- 84 7.11.8.1 Removing the Right Color (upper) ............................................................................................. 7- 84 7.11.8.2 Releasing the Front Cover .......................................................................................................... 7- 84 7.11.8.3 Releasing the Hopper Assembly ................................................................................................ 7- 85 7.11.8.4 Removing the Pre-Transfer Charging Assembly ..................................................................... 7- 87 7.11.8.5 Removing the Transfer Charging Drive Assembly .................................................................. 7- 87 7.11.8.6 Removing the Intermediate Transfer Unit................................................................................. 7- 88 7.11.8.7 Cleaning the Surface of the Intermediate Transfer Unit ......................................................... 7- 89 7.11.8.8 Sliding Out the Process Unit ....................................................................................................... 7- 90
Contents
7.11.8.9 Removing the Primary Charging Assembly .............................................................................. 7- 93 7.11.8.10 Removing the Photosensitive Drum Cleaning Unit................................................................ 7- 94 7.11.8.11 Removing the Black Developing Unit ...................................................................................... 7- 95 7.11.8.12 Removing the Photosensitive Drum......................................................................................... 7- 96 7.11.8.13 Replacing the Photosensitive Drum ......................................................................................... 7- 98 7.11.9 Drum Motor............................................................................................................................................ 7- 98 7.11.9.1 Removing the Rear Cover (upper) ............................................................................................. 7- 98 7.11.9.2 Removing the Rear Cover (lower).............................................................................................. 7- 99 7.11.9.3 Removing the Right Cover (upper rear) .................................................................................... 7- 99 7.11.9.4 Sliding the DC Controller Box ................................................................................................... 7- 100 7.11.9.5 Removing the DC Controller Box ............................................................................................. 7- 100 7.11.9.6 Points to Note When Mounting the DC Controller Box ......................................................... 7- 101 7.11.9.7 Removing the Drum Motor ........................................................................................................ 7- 101 7.11.10 Drum Heater ...................................................................................................................................... 7- 102 7.11.10.1 Removing the Right Cover (upper) ........................................................................................ 7- 102 7.11.10.2 Releasing the Front Cover....................................................................................................... 7- 102 7.11.10.3 Releasing the Hopper Assembly ............................................................................................ 7- 104 7.11.10.4 Removing the Pre-Transfer Charging Assembly ................................................................. 7- 105 7.11.10.5 Removing the Transfer Cleaner Drive Assembly................................................................. 7- 105 7.11.10.6 Removing the Intermediate Transfer Unit ............................................................................. 7- 107 7.11.10.7 Cleaning the Surface of the Intermediate Transfer Unit ..................................................... 7- 107 7.11.10.8 Sliding Out the Process Unit ................................................................................................... 7- 109 7.11.10.9 Removing the Primary Charging Assembly .......................................................................... 7- 112 7.11.10.10 Removing the Photosensitive Drum Cleaning Unit............................................................ 7- 113 7.11.10.11 Removing the Black Developing Unit .................................................................................. 7- 114 7.11.10.12 Removing the Photosensitive Drum..................................................................................... 7- 115 7.11.10.13 Points to Note When Mounting the Photosensitive Drum ................................................ 7- 117 7.11.10.14 Points to Note When Replacing the Drum Heater ............................................................. 7- 117 7.11.10.15 Removing the Drum Heater................................................................................................... 7- 119 7.11.11 Drum Heater PCB............................................................................................................................. 7- 120 7.11.11.1 Removing the Right Cover (upper) ........................................................................................ 7- 120 7.11.11.2 Releasing the Front Cover....................................................................................................... 7- 120 7.11.11.3 Releasing the Hopper Assembly ............................................................................................ 7- 122 7.11.11.4 Removing the Pre-Transfer Charging Assembly ................................................................. 7- 123 7.11.11.5 Removing the Transfer Cleaner Drive Assembly................................................................. 7- 123 7.11.11.6 Removing the Intermediate Transfer Unit ............................................................................. 7- 124 7.11.11.7 Cleaning the Surface of the Intermediate Transfer Unit ..................................................... 7- 125 7.11.11.8 Sliding Out the Process Unit ................................................................................................... 7- 126 7.11.11.9 Removing the Primary Charging Assembly .......................................................................... 7- 130 7.11.11.10 Removing the Photosensitive Drum Cleaning Unit............................................................ 7- 130 7.11.11.11 Removing the Black Developing Unit .................................................................................. 7- 131 7.11.11.12 Removing the Photosensitive Drum..................................................................................... 7- 133 7.11.11.13 Points to Note When Mounting the Photosensitive Drum ................................................ 7- 134 7.11.11.14 Removing the Drum Heater................................................................................................... 7- 134 7.11.11.15 Removing the Drum Heater PCB ......................................................................................... 7- 135 7.11.11.16 Points to Note When Replacing the Drum Heater PCB.................................................... 7- 136 7.11.12 Photosensitive Drum Cleaning Blade............................................................................................ 7- 138 7.11.12.1 Removing the Right Cover (upper) ........................................................................................ 7- 138 7.11.12.2 Releasing the Front Cover....................................................................................................... 7- 138
Contents
7.11.12.3 Releasing the Hopper Assembly ............................................................................................ 7- 140 7.11.12.4 Sliding Out the Process Unit ................................................................................................... 7- 141 7.11.12.5 Removing the Primary Charging Assembly.......................................................................... 7- 144 7.11.12.6 Removing the Photosensitive Drum Cleaning Unit ............................................................. 7- 145 7.11.12.7 Removing the Photosensitive Drum Cleaning Blade .......................................................... 7- 146 7.11.12.8 Points to Note When Replacing the Photosensitive Drum Cleaning Blade..................... 7- 146 7.11.13 Photosensitive Drum Cleaner Edge Scraper ............................................................................... 7- 147 7.11.13.1 Removing the Right Cover (upper) ........................................................................................ 7- 147 7.11.13.2 Releasing the Front Cover ...................................................................................................... 7- 148 7.11.13.3 Releasing the Hopper Assembly ............................................................................................ 7- 149 7.11.13.4 Sliding Out the Process Unit ................................................................................................... 7- 150 7.11.13.5 Removing the Primary Charging Assembly.......................................................................... 7- 154 7.11.13.6 Removing the Photosensitive Drum Cleaning Unit ............................................................. 7- 154 7.11.13.7 Removing the Photosensitive Drum Cleaner End Scraper ................................................ 7- 155 7.11.14 Hopper Assembly ............................................................................................................................. 7- 156 7.11.14.1 Removing the Right Cover (upper) ........................................................................................ 7- 156 7.11.14.2 Releasing the Front Cover ...................................................................................................... 7- 156 7.11.14.3 Releasing the Hopper Assembly ............................................................................................ 7- 157 7.11.14.4 Removing the Hopper Assembly............................................................................................ 7- 159 7.11.15 Hopper Supply Motor....................................................................................................................... 7- 159 7.11.15.1 Removing the Right Cover (upper) ........................................................................................ 7- 159 7.11.15.2 Releasing the Front Cover ...................................................................................................... 7- 159 7.11.15.3 Releasing the Hopper Assembly ............................................................................................ 7- 161 7.11.15.4 Removing the hopper Assembly ............................................................................................ 7- 162 7.11.15.5 Removing the Black Toner Supply Motor ............................................................................. 7- 163 7.11.16 Hopper Strring Motor ....................................................................................................................... 7- 163 7.11.16.1 Removing the Right Cover (upper) ........................................................................................ 7- 163 7.11.16.2 Releasing the Front Cover ...................................................................................................... 7- 164 7.11.16.3 Releasing the Hopper Assembly ............................................................................................ 7- 165 7.11.16.4 Removing the Hopper Assembly............................................................................................ 7- 166 7.11.16.5 Removing the Hopper Stirring Motor ..................................................................................... 7- 167 7.11.17 Color Developing Assembly ........................................................................................................... 7- 167 7.11.17.1 Removing the Right Cover (upper) ........................................................................................ 7- 167 7.11.17.2 Releasing the Front Cover ...................................................................................................... 7- 168 7.11.17.3 Releasing the Hopper Assembly ............................................................................................ 7- 169 7.11.17.4 Sliding Out the Process Unit ................................................................................................... 7- 170 7.11.17.5 Removing the Black Developing Unit .................................................................................... 7- 174 7.11.17.6 Removing the Color Developing Unit .................................................................................... 7- 176 7.11.17.7 When Replacing the Color Developing Unit ......................................................................... 7- 178 7.11.17.8 Replacing the Starter of the Color Developing Unit ............................................................ 7- 180 7.11.18 Black Developing Assembly ........................................................................................................... 7- 183 7.11.18.1 Removing the Right Cover (upper) ........................................................................................ 7- 183 7.11.18.2 Releasing the Front Cover ...................................................................................................... 7- 183 7.11.18.3 Releasing the Hopper Assembly ............................................................................................ 7- 184 7.11.18.4 Sliding Out the Process Unit ................................................................................................... 7- 186 7.11.18.5 Removing the Black Developing Unit .................................................................................... 7- 189 7.11.18.6 Points to Note About Replacing the Black Developing Unit............................................... 7- 191 7.11.19 Black Developing Cylinder .............................................................................................................. 7- 192 7.11.19.1 Removing the Right Cover (upper) ........................................................................................ 7- 192
Contents
7.11.19.2 Releasing the Front Cover....................................................................................................... 7- 192 7.11.19.3 Releasing the Hopper Assembly ............................................................................................ 7- 194 7.11.19.4 Sliding Out the Process Unit ................................................................................................... 7- 195 7.11.19.5 Removing the Black Developing Unit .................................................................................... 7- 199 7.11.19.6 Removing the Black Developing Cylinder ............................................................................. 7- 200 7.11.19.7 Points to Note When Handling the Black Developing Cylinder ......................................... 7- 202 7.11.19.8 Points to Note When Mounting the Polarity Positioning Plate ........................................... 7- 202 7.11.20 Black Developing Clutch.................................................................................................................. 7- 203 7.11.20.1 Remove the Rear Cover (upper) ............................................................................................ 7- 203 7.11.20.2 Removing the Right Cover (upper rear) ................................................................................ 7- 203 7.11.20.3 Sliding the DC Controller Box ................................................................................................. 7- 204 7.11.20.4 Removing the DC Controller Box ........................................................................................... 7- 204 7.11.20.5 Points to Note When Mounting the DC Controller Box ....................................................... 7- 205 7.11.20.6 Removing the Black Developing Clutch ................................................................................ 7- 206 7.11.21 Color Toner Supply Clutch .............................................................................................................. 7- 207 7.11.21.1 Removing the Rear Cover (upper) ......................................................................................... 7- 207 7.11.21.2 Removing the Right Cover (upper rear) ................................................................................ 7- 208 7.11.21.3 Sliding the DC Controller Box ................................................................................................. 7- 208 7.11.21.4 Removing the DC Controller Box ........................................................................................... 7- 209 7.11.21.5 Points to Note When Mounting the DC Controller Box ....................................................... 7- 209 7.11.21.6 Removing the Color Toner Supply Clutch............................................................................. 7- 210 7.11.22 Color Developing Clutch.................................................................................................................. 7- 211 7.11.22.1 Removing the Rear Cover (upper) ......................................................................................... 7- 211 7.11.22.2 Removing the Right Cover (upper rear) ................................................................................ 7- 212 7.11.22.3 Sliding the DC Controller Box ................................................................................................. 7- 212 7.11.22.4 Removing the DC Controller Box ........................................................................................... 7- 213 7.11.22.5 Points to Note When Mounting the DC Controller Box ....................................................... 7- 213 7.11.22.6 Removing the Color Developing Clutch ................................................................................ 7- 214 7.11.23 Cleaning Assembly Scoop-Up Sheet ............................................................................................ 7- 215 7.11.23.1 Removing the Right Cover (upper) ........................................................................................ 7- 215 7.11.23.2 Releasing the Front Cover....................................................................................................... 7- 215 7.11.23.3 Releasing the Hopper Assembly ............................................................................................ 7- 217 7.11.23.4 Removing the Pre-Transfer Charging Assembly ................................................................. 7- 218 7.11.23.5 Removing the Transfer Cleaning Drive Assembly ............................................................... 7- 218 7.11.23.6 Removing the Intermediate Transfer Unit ............................................................................. 7- 220 7.11.23.7 Cleaning the Surface of the Intermediate Transfer Unit ..................................................... 7- 220 7.11.23.8 Sliding Out the Process Unit ................................................................................................... 7- 222 7.11.23.9 Removing the Photosensitive Drum Cleaning Scoop-Up Sheet ....................................... 7- 225 7.11.23.10 Mounting the Photosensitive Drum Cleaner Scoop-Up Sheet......................................... 7- 226 7.11.24 Secondary Transfer Unit.................................................................................................................. 7- 226 7.11.24.1 Removing the Secondary Transfer Unit ................................................................................ 7- 226 7.11.25 ITB Cleaning Unit.............................................................................................................................. 7- 227 7.11.25.1 Removing the Right Cover (upper) ........................................................................................ 7- 227 7.11.25.2 Releasing the Front Cover....................................................................................................... 7- 228 7.11.25.3 Releasing the Hopper Assembly ............................................................................................ 7- 229 7.11.25.4 Removing the Pre-Transfer Charging Assembly ................................................................. 7- 230 7.11.25.5 Removing the Transfer Cleaning Drive Assembly ............................................................... 7- 231 7.11.25.6 Removing the Intermediate Transfer Unit ............................................................................. 7- 232 7.11.25.7 Cleaning the Surface of the Intermediate Transfer Unit ..................................................... 7- 233
Contents
7.11.25.8 Removing the ITB Cleaning Unit ............................................................................................ 7- 234 7.11.26 ITB Cleaner End Scraper................................................................................................................ 7- 234 7.11.26.1 Removing the Right Cover (upper) ........................................................................................ 7- 234 7.11.26.2 Releasing the Front Cover ...................................................................................................... 7- 235 7.11.26.3 Releasing the Hopper Assembly ............................................................................................ 7- 236 7.11.26.4 Removing the Pre-Transfer Charging Assembly ................................................................. 7- 237 7.11.26.5 Removing the Transfer Cleaning Drive Assembly............................................................... 7- 237 7.11.26.6 Removing the Intermediate Transfer Unit............................................................................. 7- 239 7.11.26.7 Cleaning the Surface of the Intermediate Transfer Unit ..................................................... 7- 239 7.11.26.8 Removing the ITB Cleaning Unit ............................................................................................ 7- 241 7.11.26.9 Removing the ITB Cleaner End Scraper............................................................................... 7- 241 7.11.26.10 Mounting the ITB Cleaner End Scraper .............................................................................. 7- 241 7.11.27 Intermediate Transfer Unit .............................................................................................................. 7- 242 7.11.27.1 Removing the Right Cover (upper) ........................................................................................ 7- 242 7.11.27.2 Releasing the Front Cover ...................................................................................................... 7- 242 7.11.27.3 Releasing the Hopper Assembly ............................................................................................ 7- 244 7.11.27.4 Removing the Pre-Transfer Charging Assembly ................................................................. 7- 245 7.11.27.5 Removing the Transfer Cleaner Drive Assembly ................................................................ 7- 245 7.11.27.6 Removing the Intermediate Transfer Unit............................................................................. 7- 246 7.11.27.7 Cleaning the Surface of the Intermediate Transfer Unit ..................................................... 7- 247 7.11.27.8 Points to Note When Replacing the Intermediate Transfer Unit ...................................... 7- 248 7.11.28 Intermediate Transfer Belt .............................................................................................................. 7- 248 7.11.28.1 Removing the Right Cover (upper) ........................................................................................ 7- 248 7.11.28.2 Releasing the Front Cover ...................................................................................................... 7- 249 7.11.28.3 Releasing the Hopper Assembly ............................................................................................ 7- 250 7.11.28.4 Removing the Pre-Transfer Charging Assembly ................................................................. 7- 251 7.11.28.5 Removing the Transfer Clean
Related Documents
