Canon MF3110 Service Manual

Service Manual

MF3110 Series LaserBase MF3110

Aug 27 2004

Application

This 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 informa tion in this manual that does not apply to your locality.

Corrections

This 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.

Trademarks

The product names and company names used in this manual are the registered trademarks of the individual companies.

This manual is copyrighted with all rights reserved. Under the copyright laws, this manual may not be copied, repro duced or translated into another language, in whole or in part, without the written consent of Canon Inc.

Printed in Japan

Caution

Use of this manual should be strictly supervised to avoid disclosure of confidential information.

Symbols Used

This documentation uses the following symbols to indicate special information:

Symbol Description

Indicates 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.

Introduction

Memo

REF.

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.

Indicates an item of reference assisting the understanding of the topic in question.

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 sen sors 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 pur poses, 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."

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Chapter 1ޓPRODUCT DESCRIPTION

1.1 Product Specifications.......................................................................................................................................1 1

1.1.1Product Specifications.................................................................................................................................1 1

1.2 Detailed Specifications...................................................................................................................................... 1 3

1.2.1Printing Speed ............................................................................................................................................. 1 3

1.2.2Stack Upon Delivery ................................................................................................................................... 1 3

1.2.3System Requirements for Printer Driver.....................................................................................................1 4

1.3 Names of Parts................................................................................................................................................... 1 5

1.3.1External View.............................................................................................................................................. 1 5

1.3.2Operation panel ........................................................................................................................................... 1 7

1.4 Safety................................................................................................................................................................. 1 8

1.4.1Safety of Laser Light...................................................................................................................................1 8

1.4.2Handling the Laser Unit .............................................................................................................................. 1 8

1.4.3Safety of Toner............................................................................................................................................1 9

Chapter 2ޓTECHNICAL REFERENCE

2.1 Document Feed and Exposure System.............................................................................................................. 2 1

2.1.1 Overview/Configuration ............................................................................................................................. 2 1

2.2 Laser Exposure.................................................................................................................................................. 2 2

2.2.1 Overview/Configuration ............................................................................................................................. 2 2

2.3 Image Formation ............................................................................................................................................... 2 4

2.3.1 Overview/Configuration ............................................................................................................................. 2 4

2.4 Pickup and Feed System....................................................................................................................................2 6

2.4.1 Overview/Configuration ............................................................................................................................. 2 6

2.4.2 Detection Jams............................................................................................................................................ 2 7

2.5 Fixing Unit ........................................................................................................................................................ 2 9

2.5.1 Overview/Configuration ............................................................................................................................. 2 9

2.5.2 Protective Function................................................................................................................................... 2 10

2.6 External and Controls......................................................................................................................................2 12

2.6.1 Power Supply............................................................................................................................................ 2 12

Chapter 3ޓDISASSEMBLY AND ASSEMBLY

3.1 EXTERNAL AND CONTROLS SYSTEM ..................................................................................................... 3 1

3.1.1 Front Cover ................................................................................................................................................. 3 1

3.1.2 Rear Cover .................................................................................................................................................. 3 1

3.1.3 Top Cover ................................................................................................................................................... 3 2

3.1.4 Right Cover................................................................................................................................................. 3 4

3.1.5 Left Cover ................................................................................................................................................... 3 4

3.1.6 Operation Panel Unit................................................................................................................................... 3 5

3.1.7 SCNT Board................................................................................................................................................ 3 7

3.1.8 ECNT Board ...............................................................................................................................................3 9

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3.1.9 Power Supply PCB....................................................................................................................................3 10

3.1.10 Highvoitage Power Supply PCB............................................................................................................3 12

3.1.11 Top Sensor...............................................................................................................................................3 14

3.1.12 Paper Delivery Sensor.............................................................................................................................3 17

3.2 Document Feed/Exposure System...................................................................................................................3 21

3.2.1 Scanner Unit..............................................................................................................................................3 21

3.2.2 Scanner Cover Unit ...................................................................................................................................3 22

3.2.3 CCD Unit...................................................................................................................................................3 25

3.2.4 Flatbed Motor Unit....................................................................................................................................3 28

3.3 LASER EXPOSURE SYSTEM ......................................................................................................................3 31

3.3.1 Laser/Scanner Unit....................................................................................................................................3 31

3.4 IMAGE FORMATION SYSTEM...................................................................................................................3 34

3.4.1 Transfer Charging Roller ..........................................................................................................................3 34

3.5 PICKUP AND FEEDING SYSTEM...............................................................................................................3 35

3.5.1 Cassette Pickup Roller ..............................................................................................................................3 35

3.5.2 Cassette Pickup Solenoid ..........................................................................................................................3 39

3.5.3 Cassette Separation Pad ............................................................................................................................3 42

3.5.4 Paper Feed Roller......................................................................................................................................3 43

3.5.5 Manual Pickup Solenoid ...........................................................................................................................3 48

3.5.6 Main Motor ...............................................................................................................................................3 51

3.5.7 Gear Unit...................................................................................................................................................3 55

3.6 FIXING SYSTEM...........................................................................................................................................3 56

Chapter 4ޓMAINTENANCE AND INSPECTION

4.1 Periodically Replaced Parts...............................................................................................................................4 1

4.1.1Parts Requiring Periodical Replacement .....................................................................................................4 1

4.2 Consumables......................................................................................................................................................4 2

4.2.1Consumable .................................................................................................................................................4 2

4.3 Periodical Service..............................................................................................................................................4 3

4.3.1Items Requiring Scheduled Servicing .........................................................................................................4 3

4.4 Cleaning.............................................................................................................................................................4 4

4.4.1Items Requiring Cleaning............................................................................................................................4 4

4.4.2Cleaning Method (external covers) .............................................................................................................4 5

4.4.3Cleaning Method (scanning unit) ................................................................................................................4 5

4.4.4Cleaning Method (printer unit)....................................................................................................................4 6

4.5 Lubrications .......................................................................................................................................................4 8

4.5.1Areas Requiring Application of Grease.......................................................................................................4 8

4.5.2Delivery Idler Gear......................................................................................................................................4 9

4.5.3Fixing Drive Transmission Gear ...............................................................................................................4 10

4.5.4Large Gear Bushing R ...............................................................................................................................4 10

4.5.5Large Gear .................................................................................................................................................4 11

4.5.6Feed Gear...................................................................................................................................................4 11

4.5.7Internal Gear ..............................................................................................................................................4 12

4.5.8Large Gear Deceleration Gear/Plate R......................................................................................................4 12

4.5.9Main Motor................................................................................................................................................4 13

4.5.10Drive Releasing Arm...............................................................................................................................4 14

4.5.11FU Delivery Roller ..................................................................................................................................4 14

4.5.12Pickup Idler Gear.....................................................................................................................................4 15

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4.5.13Feed Deceleration Gear........................................................................................................................... 4 15

4.5.14Fixing Deceleration Gear ........................................................................................................................ 4 16

4.5.15FD Delivery Roller.................................................................................................................................. 4 17

4.5.16Large Gear Bushing F ............................................................................................................................. 4 17

4.5.17Pressure roller.......................................................................................................................................... 4 18

4.5.18Cassette Pickup Roller.............................................................................................................................4 18

4.5.19CCD Shaft ...............................................................................................................................................4 19

4.5.20Wheel Shaft ............................................................................................................................................. 4 19

Chapter 5ޓTROUBLESHOOTING

5.1 Phenomenon Table............................................................................................................................................ 5 1

5.1.1Symptoms....................................................................................................................................................5 1

5.2 Countermeasure................................................................................................................................................. 5 2

5.2.1 Image Faults................................................................................................................................................ 5 2

5.2.2 Malfunction................................................................................................................................................. 5 2

5.2.3 Printing/Scanning........................................................................................................................................ 5 3

5.2.4 Jam (Main Unit).......................................................................................................................................... 5 3

5.3 Measurement and Adjustment........................................................................................................................... 5 4

5.3.1 Basic Adjustments ...................................................................................................................................... 5 4

5.4 Service Tools..................................................................................................................................................... 5 5

5.4.1Special Tools...............................................................................................................................................5 5

5.5 Error Code .........................................................................................................................................................5 6

5.5.1 Outline......................................................................................................................................................... 5 6

5.5.2 Service Error Code...................................................................................................................................... 5 6

5.6 Service Mode..................................................................................................................................................... 5 8

5.6.1 Outline......................................................................................................................................................... 5 8

5.6.2 Service Soft Switch Settings (SSSW).......................................................................................................5 12

5.6.3 ROM Management (ROM)....................................................................................................................... 5 14

5.6.4 Test Mode (TEST).................................................................................................................................... 5 14

Chapter 6ޓAPPENDIX

6.1 Outline of Electrical Components..................................................................................................................... 6 1

6.1.1 Sensor..........................................................................................................................................................6 1

6.1.2 PCBs ........................................................................................................................................................... 6 2

Chapter 1ޓPRODUCT

DESCRIPTION