Canon MF4600 Service Manual

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Service Manual

MF4600 Series

Feb 26 2007

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 information 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, reproduced 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.

Introduction

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.

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

Chapter 1 Introduction
1.1 Product Specifications ................................................................................................................................	1- 1
1.1.1 Names of Parts........................................................................................................................................................	1- 1
1.1.1.1 External View ...........................................................................................................................................................................	1- 1
1.1.1.2 Section View (Host Machine)...................................................................................................................................................	1- 3
1.1.1.3 Section View (ADF)..................................................................................................................................................................	1- 3
1.1.1.4 Control panel............................................................................................................................................................................	1- 4
1.1.2 Safety ......................................................................................................................................................................	1- 5
1.1.2.1 Safety of the Host Machine's Laser Mechanism ......................................................................................................................	1- 5
1.1.2.2 CDRH Regulations...................................................................................................................................................................	1- 5
1.1.2.3 Handling of the Laser Assembly ..............................................................................................................................................	1- 6
1.1.2.4 Safety of the Toner ..................................................................................................................................................................	1- 6
1.1.2.5 Fire Attention............................................................................................................................................................................	1- 6
1.1.2.6 Points no Note when Replacing / Disposing the Lithium Battery .............................................................................................	1- 6
1.1.3 Product Specifications .............................................................................................................................................	1- 7
1.1.3.1 Host Machine Specifications....................................................................................................................................................	1- 7
1.1.3.2 ADF Specifications...................................................................................................................................................................	1- 8
1.1.3.3 FAX Specifications...................................................................................................................................................................	1- 8
Chapter 2 Basic Operation
2.1 Construction ...............................................................................................................................................	2- 1
2.1.1 Function Configuration ............................................................................................................................................	2- 1
2.2 Basic Sequence..........................................................................................................................................	2- 1
2.2.1 Basic Operation Sequence......................................................................................................................................	2- 1
Chapter 3 Original Exposure System
3.1 Basic Constraction......................................................................................................................................	3- 1
3.1.1 Specifications / Control / Function List ....................................................................................................................	3- 1
3.1.2 Major Components ..................................................................................................................................................	3- 1
3.2 Various Control...........................................................................................................................................	3- 2
3.2.1 Dirt Sensor Control ..................................................................................................................................................	3- 2
3.2.1.1 Outline......................................................................................................................................................................................	3- 2
3.3 Parts Replacement Procedure ...................................................................................................................	3- 4
3.3.1 Scanner Unit............................................................................................................................................................	3- 4
3.3.1.1 Preparation for Removing the Control Panel Assembly...........................................................................................................	3- 4
3.3.1.2 Removing the Control Panel Assembly ...................................................................................................................................	3- 4
3.3.2 Book Motor ..............................................................................................................................................................	3- 4
3.3.2.1 Preparation for Removing the Flat Bed Motor .........................................................................................................................	3- 4
3.3.2.2 Removing the Flat Bed Motor ..................................................................................................................................................	3- 4
3.3.3 Contact Sensor........................................................................................................................................................	3- 5
3.3.3.1 Removing the Contact Sensor .................................................................................................................................................	3- 5
Chapter 4 Original Feeding System
4.1 Basic Operation ..........................................................................................................................................	4- 1
4.1.1 Basic Operation .......................................................................................................................................................	4- 1
4.1.2 Original Detection ....................................................................................................................................................	4- 2
4.2 Detection Jams...........................................................................................................................................	4- 2
4.2.1 Jam Detection..........................................................................................................................................................	4- 2

4.3 ADF ............................................................................................................................................................

4- 3

Contents

4.3.1 Pick-up Roller...........................................................................................................................................................	4- 3
4.3.1.1 Removing the ADF Pickup Roller ............................................................................................................................................	4- 3
4.3.2 ADF Motor................................................................................................................................................................	4- 3
4.3.2.1 Preparation for Removing the ADF Motor................................................................................................................................	4- 3
4.3.2.2 Removing the ADF Motor ........................................................................................................................................................	4- 3
4.3.3 Separation Pad ........................................................................................................................................................	4- 4
4.3.3.1 Removing the Separation Pad .................................................................................................................................................	4- 4

Chapter 5 Laser Exposure
5.1	Overview/Configuration ..............................................................................................................................	5- 1
5.1.1 Overview ..................................................................................................................................................................		5- 1
5.2	Controlling the Laser Activation Timing......................................................................................................	5- 2
5.2.1 Laser ON / OFF Control...........................................................................................................................................		5- 2
5.3	Controlling the Intensity of Laser Light .......................................................................................................	5- 2
5.3.1 Auto Photoelectric Current Control (APC) ...............................................................................................................		5- 2
5.4	Controlling the Laser Scanner Motor..........................................................................................................	5- 2
5.4.1 Overview ..................................................................................................................................................................		5- 2
5.4.2 Scanner Motor Speed Control .................................................................................................................................		5- 3
5.4.3 Detection of Fault of the Scanner Motor ..................................................................................................................		5- 3
5.5	Parts Replacement Procedure ...................................................................................................................	5- 4
5.5.1 Laser/Scanner Unit ..................................................................................................................................................		5- 4
	5.5.1.1 Preparation for Removing the Laser Scanner Unit ..................................................................................................................	5- 4
	5.5.1.2 Removing the Laser Scanner Unit ...........................................................................................................................................	5- 4
Chapter 6 Image Formation
6.1	Overview/Configuration ..............................................................................................................................	6- 1
6.1.1 Configuration............................................................................................................................................................		6- 1
6.1.2 Print Process............................................................................................................................................................		6- 1
6.2	Driving and Controlling the High-Voltage System ......................................................................................	6- 3
6.2.1 Generation of Transfer Charging Bias .....................................................................................................................		6- 3
6.3	Toner Cartridge ..........................................................................................................................................	6- 3
6.3.1 Toner Level Detection..............................................................................................................................................		6- 3
6.4	Parts Replacement Procedure ...................................................................................................................	6- 4
6.4.1 Transfer Charging Roller..........................................................................................................................................		6- 4
	6.4.1.1 Removing the Transfer Charging Roller ..................................................................................................................................	6- 4
Chapter 7 Pickup and Feed System
7.1	Overview/Configuration ..............................................................................................................................	7- 1
7.1.1 Overview ..................................................................................................................................................................		7- 1
7.2	Other Control..............................................................................................................................................	7- 1
7.2.1 Overview ..................................................................................................................................................................		7- 1
7.3	Detection Jams...........................................................................................................................................	7- 3
7.3.1 Jam Detection Outline..............................................................................................................................................		7- 3
	7.3.1.1 Overview ..................................................................................................................................................................................	7- 3
7.3.2 Delay Jams ..............................................................................................................................................................		7- 3
	7.3.2.1 Pickup Delay Jam ...................................................................................................................................................................	7- 3
	7.3.2.2 Delivery Delay Jam ..................................................................................................................................................................	7- 3
7.3.3 Stationary Jams .......................................................................................................................................................		7- 3
	7.3.3.1 Pickup Stationary Jam ............................................................................................................................................................	7- 3
	7.3.3.2 Delivery Stationary Jam ..........................................................................................................................................................	7- 3
7.3.4 Other Jams ..............................................................................................................................................................		7- 3

7.3.4.1 Door Open Jam .......................................................................................................................................................................	7- 3
7.3.4.2 Wrapping Jam .........................................................................................................................................................................	7- 3
7.3.4.3 Residual Jam at Startup ..........................................................................................................................................................	7- 4

	Contents


7.4 Duplex Unit .................................................................................................................................................	7- 5
7.4.1 Overview..................................................................................................................................................................	7- 5
7.5 Parts Replacement Procedure ...................................................................................................................	7- 6
7.5.1 Main Motor...............................................................................................................................................................	7- 6
7.5.1.1 Preparation for Removing Main Motor .....................................................................................................................................	7- 6
7.5.1.2 Removing Main Motor..............................................................................................................................................................	7- 6
7.5.2 Separation Pad........................................................................................................................................................	7- 6
7.5.2.1 Preparation for Removing Separation Pad ..............................................................................................................................	7- 6
7.5.2.2 Removing Separation Pad .......................................................................................................................................................	7- 6
7.5.3 Pickup Roller ...........................................................................................................................................................	7- 6
7.5.3.1 Removing Pickup Roller...........................................................................................................................................................	7- 6
Chapter 8 Fixing System
8.1 Overview/Configuration ..............................................................................................................................	8- 1
8.1.1 Specification/Control/Function List .........................................................................................................................	8- 1
8.1.2 Overview..................................................................................................................................................................	8- 1
8.2 Various Control Mechanisms......................................................................................................................	8- 3
8.2.1 Controlling the Temperature of the Fixing Unit........................................................................................................	8- 3
8.2.1.1 Fixing Temperature Control ....................................................................................................................................................	8- 3
8.3 Protection Function.....................................................................................................................................	8- 4
8.3.1 Protection Function .................................................................................................................................................	8- 4
8.4 Parts Replacement Procedure ...................................................................................................................	8- 6
8.4.1 Fixing Unit................................................................................................................................................................	8- 6
8.4.1.1 Preparation for Removing Fixing Assembly.............................................................................................................................	8- 6
8.4.1.2 Removing Fixing Assembly......................................................................................................................................................	8- 6
8.4.2 Fixing Film Unit........................................................................................................................................................	8- 6
8.4.2.1 Preparation for Removing Fixing Film Unit ..............................................................................................................................	8- 6
8.4.2.2 Removing Fixing Film Unit .......................................................................................................................................................	8- 6
Chapter 9 External and Controls
9.1 Control Panel..............................................................................................................................................	9- 1
9.1.1 Outline .....................................................................................................................................................................	9- 1
9.2 Power Supply .............................................................................................................................................	9- 1
9.2.1 Protection Function..................................................................................................................................................	9- 1
9.2.1.1 Protecting Function ..................................................................................................................................................................	9- 1
9.3 Parts Replacement Procedure ...................................................................................................................	9- 2
9.3.1 Front Cover..............................................................................................................................................................	9- 2
9.3.1.1 Removing the Front Cover.......................................................................................................................................................	9- 2
9.3.2 Rear Cover ..............................................................................................................................................................	9- 2
9.3.2.1 Preparation for Removing the Rear Cover...............................................................................................................................	9- 2
9.3.2.2 Removing the Rear Cover .......................................................................................................................................................	9- 2
9.3.3 Right Cover..............................................................................................................................................................	9- 2
9.3.3.1 Removing the Right Cover.......................................................................................................................................................	9- 2
9.3.4 Left Cover ................................................................................................................................................................	9- 2
9.3.4.1 Removing the Left Cover .........................................................................................................................................................	9- 2
9.3.5 Upper Cover ............................................................................................................................................................	9- 3
9.3.5.1 Preparation for Removing the Upper Cover.............................................................................................................................	9- 3
9.3.5.2 Removing the Upper Cover .....................................................................................................................................................	9- 3
9.3.6 Cartridge Cover .......................................................................................................................................................	9- 3
9.3.6.1 Preparation for Removing the Printer Cover............................................................................................................................	9- 3
9.3.6.2 Removing the Printer Cover.....................................................................................................................................................	9- 3
9.3.7 Operation Panel Unit ...............................................................................................................................................	9- 4
9.3.7.1 Removing the Control Panel Unit.............................................................................................................................................	9- 4
9.3.8 SCNT Board ............................................................................................................................................................	9- 4

9.3.8.1	Preparation for Removing the SCNT Board.............................................................................................................................	9- 4
9.3.8.2	Removing the SCNT Board .....................................................................................................................................................	9- 4

Contents

9.3.8.3 Actions At Replacing the SCNT Board ....................................................................................................................................	9- 5
9.3.9 DCNT Board ............................................................................................................................................................	9- 5
9.3.9.1 Preparation for Removing the DCNT Board ............................................................................................................................	9- 5
9.3.9.2 Removing the DCNT Board .....................................................................................................................................................	9- 5
9.3.10 Analog Processor PCB ..........................................................................................................................................	9- 6
9.3.10.1 Preparation for Removing the Analog processor PCB...........................................................................................................	9- 6
9.3.10.2 Removing the Analog processor PCB....................................................................................................................................	9- 6
9.3.11 NCU Board.............................................................................................................................................................	9- 6
9.3.11.1 Preparation for Removing the NCU Board.............................................................................................................................	9- 6
9.3.11.2 Removing the NCU Board......................................................................................................................................................	9- 6
9.3.12 Power Supply PCB.................................................................................................................................................	9- 7
9.3.12.1 Preparation for Removing the Power Supply Board ..............................................................................................................	9- 7
9.3.12.2 Removing the Power Supply Board .......................................................................................................................................	9- 7
9.3.13 High-voitage Power Supply PCB ...........................................................................................................................	9- 7
9.3.13.1 Preparation for Removing the High Voltage Power Supply Board.........................................................................................	9- 7
9.3.13.2 Removing the High Voltage Power Supply Board..................................................................................................................	9- 7
9.3.14 Motor Driver PCB ...................................................................................................................................................	9- 7
9.3.14.1 Preparation for Removing the Motor driver PCB....................................................................................................................	9- 7
9.3.14.2 Removing the Motor driver PCB ............................................................................................................................................	9- 8

Chapter 10 Maintenance and Inspection
10.1	Periodically Replaced Parts....................................................................................................................	10- 1
10.1.1 Periodically Replaced Parts .................................................................................................................................		10- 1
10.2	Consumables..........................................................................................................................................	10- 1
10.2.1 Consumable .........................................................................................................................................................		10- 1
10.3	Periodical Service...................................................................................................................................	10- 1
10.3.1 Periodically Service Items ....................................................................................................................................		10- 1
10.4	Cleaning .................................................................................................................................................	10- 1
10.4.1 Cleaning Items .....................................................................................................................................................		10- 1
10.4.2 Cleaning Method (External Covers) .....................................................................................................................		10- 1
10.4.3 Cleaning Method (Reader Unit) ...........................................................................................................................		10- 2
10.4.4 Cleaning Method (Pressure Roller)......................................................................................................................		10- 2
Chapter 11 Measurement and Adjustments
11.1	Scanning System....................................................................................................................................	11- 1
11.1.1 Procedure after Replacing the CIS ......................................................................................................................		11- 1
11.1.2 Procedure after Replacing the Copyboard Glass.................................................................................................		11- 1
11.2	Electrical Adjustments ............................................................................................................................	11- 1
11.2.1 Procedure after Replacing the SCNT board ........................................................................................................		11- 1
Chapter 12 Correcting Faulty Images
12.1	Outline of Electrical Components ...........................................................................................................	12- 1
12.1.1 Clutch/Solenoid/Motor/Fan...................................................................................................................................		12- 1
	12.1.1.1 List of Solenoids/Motors.......................................................................................................................................................	12- 1
12.1.2 Sensor..................................................................................................................................................................		12- 2
	12.1.2.1 List of Sensors .....................................................................................................................................................................	12- 2
12.1.3 PCBs ....................................................................................................................................................................		12- 3
	12.1.3.1 List of PCBs .........................................................................................................................................................................	12- 3
Chapter 13 Error Code
13.1	Error Code ..............................................................................................................................................	13- 1
13.1.1 List of Error Codes ...............................................................................................................................................		13- 1
13.2	Fax Error Codes .....................................................................................................................................	13- 2

13.2.1 Outline..................................................................................................................................................................

13- 2

	Contents


13.2.1.1 Error Code Outline ...............................................................................................................................................................	13- 2
13.2.2 User Error Code...................................................................................................................................................	13- 3
13.2.2.1 User Error Code ...................................................................................................................................................................	13- 3
13.2.3 Service Error Code ..............................................................................................................................................	13- 3
13.2.3.1 Service Error Code...............................................................................................................................................................	13- 3
Chapter 14 Service Mode
14.1 Outline ....................................................................................................................................................	14- 1
14.1.1 Outline of Service Mode ......................................................................................................................................	14- 1
14.1.2 Using the Mode....................................................................................................................................................	14- 1
14.2 Default Settings ......................................................................................................................................	14- 2
14.2.1 Service Mode Menus ...........................................................................................................................................	14- 2
14.3 Service Soft Switch Settings (SSSW).....................................................................................................	14- 5
14.3.1 Outline .................................................................................................................................................................	14- 5
14.3.1.1 Bit Switch Composition ........................................................................................................................................................	14- 5
14.3.2 SSSW-SW01: ......................................................................................................................................................	14- 6
14.3.2.1 List of Functions ...................................................................................................................................................................	14- 6
14.3.2.2 Detailed Discussions of Bit 0................................................................................................................................................	14- 6
14.3.3 SSSW-SW03 .......................................................................................................................................................	14- 6
14.3.3.1 List of Functions ...................................................................................................................................................................	14- 6
14.3.3.2 Detailed Discussions of Bit 7................................................................................................................................................	14- 6
14.3.4 SSSW-SW04 .......................................................................................................................................................	14- 6
14.3.4.1 List of Functions ...................................................................................................................................................................	14- 6
14.3.4.2 Detailed Discussions of Bit 2................................................................................................................................................	14- 7
14.3.4.3 Detailed Discussions of Bit 3................................................................................................................................................	14- 7
14.3.4.4 Detailed Discussions of Bit 4................................................................................................................................................	14- 7
14.3.4.5 Detailed Discussions of Bit 6................................................................................................................................................	14- 7
14.3.4.6 Detailed Discussions of Bit 7................................................................................................................................................	14- 7
14.3.5 SSSW-SW05 .......................................................................................................................................................	14- 7
14.3.5.1 List of Functions ...................................................................................................................................................................	14- 7
14.3.5.2 Detailed Discussions of Bit 1................................................................................................................................................	14- 7
14.3.5.3 Detailed Discussions of Bit 2................................................................................................................................................	14- 7
14.3.6 SSSW-SW12 .......................................................................................................................................................	14- 8
14.3.6.1 List of Functions ...................................................................................................................................................................	14- 8
14.3.7 SSSW-SW13 .......................................................................................................................................................	14- 8
14.3.7.1 List of Functions ...................................................................................................................................................................	14- 8
14.3.7.2 Detailed Discussions of Bit 2................................................................................................................................................	14- 8
14.3.8 SSSW-SW14 .......................................................................................................................................................	14- 8
14.3.8.1 List of Functions ...................................................................................................................................................................	14- 8
14.3.8.2 Detailed Discussions of Bit 2................................................................................................................................................	14- 9
14.3.8.3 Detailed Discussions of Bit 4................................................................................................................................................	14- 9
14.3.9 SSSW-SW18 .......................................................................................................................................................	14- 9
14.3.9.1 List of Functions ...................................................................................................................................................................	14- 9
14.3.9.2 Detailed Discussions of Bit 0................................................................................................................................................	14- 9
14.3.9.3 Detailed Discussions of Bit 1................................................................................................................................................	14- 9
14.3.10 SSSW-SW25 .....................................................................................................................................................	14- 9
14.3.10.1 List of Functions .................................................................................................................................................................	14- 9
14.3.10.2 Detailed Discussions of Bit 0..............................................................................................................................................	14- 9
14.3.10.3 Detailed Discussions of Bit 2............................................................................................................................................	1410
14.3.11 SSSW-SW28 ...................................................................................................................................................	1410
14.3.11.1 List of Functions ...............................................................................................................................................................	1410
14.3.11.2 Detailed Discussions of Bit 0............................................................................................................................................	1410
14.3.11.3 Detailed Discussions of Bit 1............................................................................................................................................	1410
14.3.11.4 Detailed Discussions of Bit 2............................................................................................................................................	1410
14.3.11.5 Detailed Discussions of Bit 3............................................................................................................................................	1410
14.3.11.6 Detailed Discussions of Bit 4............................................................................................................................................	1410
14.3.11.7 Detailed Discussions of Bit 5............................................................................................................................................	1410

14.3.12 SSSW-SW30 ...................................................................................................................................................

1410

Contents

14.3.12.1 List of Functions ...............................................................................................................................................................	1410
14.3.12.2 Detailed Discussions of Bit 5............................................................................................................................................	1410
14.4 Menu Switch Settings (MENU) .............................................................................................................	1411
14.4.1 Menu Switch Composition..................................................................................................................................	1411
14.4.2 <No.005 NL equalizer> ......................................................................................................................................	1411
14.4.3 <No.006 telephone line monitor> .......................................................................................................................	1411
14.4.4 <No.007 ATT transmission level> ......................................................................................................................	1411
14.4.5 <No.008 V.34 modulation speed upper limit> ....................................................................................................	1411
14.4.6 <No.009 V.34 data speed upper limit>...............................................................................................................	1411
14.4.7 <No.010 Frequency of the pseudo CI signal>....................................................................................................	1411
14.5 Numeric Parameter Settings (NUMERIC Param.)................................................................................	1411
14.5.1 Numerical Parameter Composition ....................................................................................................................	1411

14.5.2 <002: RTN transmission condition (1)><003: RTN transmission condition (2)><004: RTN transmission condition (3)>

1412
14.5.3 <005: NCC pause length (pre-ID code)> ...........................................................................................................		1412
14.5.4 <006: NCC pause length (post-ID code)>..........................................................................................................		1412
14.5.5 <010: line connection identification length> .......................................................................................................		1412
14.5.6 <011: T.30	T1 timer (for reception)> ..................................................................................................................	1413
14.5.7 <013: T.30	EOL timer>.......................................................................................................................................	1413
14.5.8 <016: time length to first response at time of fax/tel switchover> ......................................................................		1413

14.5.9 <017: pseudo RBT signal pattern ON time length><018: pseudo RBT signal pattern OFF time length (short)><019:

pseudo RBT signal pattern OFF time length (long)> ...............................................................................................

1413

14.5.10 <020: pseudo CI signal pattern ON time length><021: pseudo CI signal pattern OFF time length (short)><022:

pseudo CI signal pattern OFF time length (long)> ...................................................................................................	1413
14.5.11 <023: CNG detention level for fax/tel switchover> ...........................................................................................	1413
14.5.12 <024: pseudo RBT transmission level at time of fax/tel switchover> ...............................................................	1413
14.5.13 <025: Answering machine connection function signal detection time> ............................................................	1413
14.5.14 <027: V.21 low-speed flag preamble identification length>..............................................................................	1413
14.5.15 <056 - 061: Count type select > .......................................................................................................................	1413
14.6 Scanner Function Settings (SCANNER)...............................................................................................	1416
14.6.1 Numeric Parameter Functional configuration.....................................................................................................	1416
14.6.2 <031Vertical scan start position adjustment> ....................................................................................................	1417
14.6.3 <033Vertical scan magnification correction> .....................................................................................................	1417
14.6.4 <035: - 036:Reader motor speed change> ........................................................................................................	1417
14.6.5 <041: Vertical scan start position adjustment (when scanning on a document fed from ADF)>........................	1417
14.6.6 <047: Vertical scan magnification correction (when scanning on a document fed from ADF)>.........................	1417
14.6.7 <048: Horizontal scan magnification correction (when scanning on a document fed from ADF)>.....................	1417
14.7 Printer Function Settings (PRINTER) ...................................................................................................	1417
14.7.1 Service Soft Switch Settings (SSSW) ................................................................................................................	1417
14.7.1.1 SSSW-SW15......................................................................................................................................................................	1417
14.7.2 Numeric Parameter Settings (NUMERIC Param.) .............................................................................................	1417
14.7.2.1 <034: Left-end registration adjustment (malti-purpose tray)> ............................................................................................	1417
14.7.2.2 <035: Left-end registration adjustment (cassette)>............................................................................................................	1418
14.7.2.3 <039: Left-end registration adjustment (duplex unit)>........................................................................................................	1418
14.7.2.4 <053: Margin adjustment at the leading edge of the copy> ...............................................................................................	1418
14.7.2.5 <054: Margin adjustment at the trailing edge of the copy> ................................................................................................	1418
14.7.2.6 <055: Margin adjustment at the right edge of the copy>....................................................................................................	1418
14.7.2.7 <056: Margin adjustment at the left edge of the copy> ......................................................................................................	1418
14.8 Setting of System Functions (SYSTEM)...............................................................................................	1418
14.8.1 Bit Switch Settings .............................................................................................................................................	1418
14.9 Counter Indication (COUNTER) ...........................................................................................................	1418
14.9.1 Counters.............................................................................................................................................................	1418
14.9.2 Clearing Counters ..............................................................................................................................................	1419
14.10 Report Output (REPORT)...................................................................................................................	1420

14.10.1	Report Output...................................................................................................................................................	1420
14.10.2	System Data List ..............................................................................................................................................	1420

	Contents


14.10.3 System Dump List............................................................................................................................................	1421
14.10.4 Counter List......................................................................................................................................................	1422
14.10.5 Spec List ..........................................................................................................................................................	1422
14.11 Data Initialization Mode (CLEAR) .......................................................................................................	1424
14.11.1 Clear ................................................................................................................................................................	1424
14.12 ROM Management (ROM)..................................................................................................................	1424
14.12.1 ROM Display....................................................................................................................................................	1424
14.13 Test Mode (TEST) ..............................................................................................................................	1424
14.13.1 Overview ..........................................................................................................................................................	1424
14.13.1.1 Outline ..............................................................................................................................................................................	1424
14.13.1.2 Test Mode Menu List .......................................................................................................................................................	1425
14.13.2 DRAM Test ......................................................................................................................................................	1426
14.13.2.1 D-RAM Test<(1) D-RAM TEST> ......................................................................................................................................	1426
14.13.3 Scan Test.........................................................................................................................................................	1426
14.13.3.1 Scan Test ((2) SCAN TEST) ............................................................................................................................................	1426
14.13.4 Print Test..........................................................................................................................................................	1427
14.13.4.1 Print Test ((3) PRINT TEST) ............................................................................................................................................	1427
14.13.5 Modem Test .....................................................................................................................................................	1427
14.13.5.1 MODEM Test ((4) MODEM TEST)...................................................................................................................................	1427
14.13.6 Faculty Test .....................................................................................................................................................	1429
14.13.6.1 FUNCTION TEST <(6) FUNCTION TEST> .....................................................................................................................	1429
14.13.7 Cleaning Mode.................................................................................................................................................	1431
14.13.7.1 Roller cleaning mode ((0) ROLLER CLEAN) ...................................................................................................................	1431
Chapter 15 Service Tools
15.1 Service Tools ..........................................................................................................................................	15- 1
15.1.1 Solvents / Lubricants Table .................................................................................................................................	15- 1

Chapter 1 Introduction

Contents

1.1 Product Specifications....................................................................................................................................................	1-1
1.1.1 Names of Parts .............................................................................................................................................................................	1-1
1.1.1.1 External View..................................................................................................................................................................................................	1-1
1.1.1.2 Section View (Host Machine).........................................................................................................................................................................	1-3
1.1.1.3 Section View (ADF) .......................................................................................................................................................................................	1-3
1.1.1.4 Control panel...................................................................................................................................................................................................	1-4
1.1.2 Safety ...........................................................................................................................................................................................	1-5
1.1.2.1 Safety of the Host Machine's Laser Mechanism .............................................................................................................................................	1-5
1.1.2.2 CDRH Regulations..........................................................................................................................................................................................	1-5
1.1.2.3 Handling of the Laser Assembly.....................................................................................................................................................................	1-6
1.1.2.4 Safety of the Toner..........................................................................................................................................................................................	1-6
1.1.2.5 Fire Attention ..................................................................................................................................................................................................	1-6
1.1.2.6 Points no Note when Replacing / Disposing the Lithium Battery ..................................................................................................................	1-6
1.1.3 Product Specifications .................................................................................................................................................................	1-7
1.1.3.1 Host Machine Specifications...........................................................................................................................................................................	1-7
1.1.3.2 ADF Specifications .........................................................................................................................................................................................	1-8
1.1.3.3 FAX Specifications .........................................................................................................................................................................................	1-8

Chapter 1

1.1 Product Specifications

1.1.1 Names of Parts

1.1.1.1 External View

i-SENSYS MF4690PL / i-SENSYS MF4660

Front View (Body)

[9]

[10]

[11]

[1]

[2]

[3]

[4]

[12]

[13]

[8]

[7]

[6]

[5]

[16] [15] [14]

[17]

F-1-1

[1]ADF (Automatic Document Feeder)

[2]Slide Guides

[3]Document feeder tray

[4]Document delivery tray

[5]Operation panel

[6]USB memory port

[7]Output tray

[8]Paper cassette

[9]Scanning area

[10]Platen glass

[11]Output tray extension

[12]Paper stopper

[13]Slide guides for multi-purpose tray

[14]Paper guide rail

[15]Dust cover

[16]Multi-purpose tray

[17]Main power switch

1-1

Chapter 1

Rear View (Body)

[1]

[7]

[2]

[6] [5] [4]	[3]
	F-1-2
	T-1-1
[1] USB port	[5] External device jack*
[2] Rear cover	[6] Handset jack*
[3] Power socket	[7] Ethernet port
[4] Telephone line jack*	* MF4690PL only

1-2

Chapter 1

1.1.1.2 Section View (Host Machine) i-SENSYS MF4690PL / / i-SENSYS MF4660

[1]	[2]	[3]	[4]

[14]

[13]

[12]

[11]

[10]

[9]

[8]

[7]

[6]

[5]

F-1-3

[1]

pressure roller

[8]

pick-up roller

[2]

copyboard glass (scanning glass)

[9]

separation pad

[3]

delivery roller

[10]

cartridge

[4]

fixing film unit

[11]

duplexing feeding roller

[5]

laser scanner unit

[12]

transfer charging roller

[6]

primary charging roller

[13]

photosensitive drum

[7]

developing cylinder

[14]

fixing unit

1.1.1.3 Section View (ADF) i-SENSYS MF4690PL / / i-SENSYS MF4660

[1]

[2]

[3]

[4]

F-1-4

[1]registration roller

[2]pickup roller

[3]separation pad

[4]delivery roller

1-3

Chapter 1

1.1.1.4 Control panel

i-SENSYS MF4690PL / i-SENSYS MF4660

- MF4690PL

[1] [2]

[3]

[4]

[5] [6] [7] [8]

[9]

[10]

[11] [12]

[13]

[25][24]	[23]	[22]	[21]	[20]	[19]	[18]	[17] [16]	[15]	[14]
				F-1-5
				T-1-2
[1] [System Monitor] key				[14] [Stop/Reset] key
[2] [View Settings] key				[15] Error indicator
[3] [COPY] key				[16] Processing/Data indicator
[4] [SEND/FAX] key				[17] [Start] key
[5] [SCAN] key				[18] Numeric key
[6] [Additional Functions] key				[19] [Tone] key
[7] [2-Sided] key				[20] [Clear] key
[8] [Enlarge/Reduce] key				[21] [+] key
[9] [Density] key				[22] [OK] key
[10] [Image Quality] key				[23] [-] key
[11] [Collate/2 on 1] key				[24] LCD display
[12] [Log In/Out] key (ID) key				[25] [Toner Gauge] key
[13] [Energy Saver] key

1-4

Chapter 1

- MF4660PL

[1] [2]

[3]

[4]

[5] [6] [7]

[8]

[9]

[10] [11]

[12]

[24][23]	[22]	[21]	[20]	[19]	[18]	[17]	[16] [15]	[14]	[13]
				F-1-6
				T-1-3
[1] [System Monitor] key				[13] [Stop/Reset] key
[2] [View Settings] key				[14] Error indicator
[3] [COPY] key				[15] Processing/Data indicator
[4] [SCAN] key				[16] [Start] key
[5] [Additional Functions] key				[17] Numeric key
[6] [2-Sided] key				[18] [Tone] key
[7] [Enlarge/Reduce] key				[19] [Clear] key
[8] [Density] key				[20] [+] key
[9] [Image Quality] key				[21] [OK] key
[10] [Collate/2 on 1] key				[22] [-] key
[11] [Log In/Out] key (ID) key				[23] LCD display
[12] [Energy Saver] key				[24] [Toner Gauge] key
- MF4690PL only
				[1]	[2]	[3]	[4]

	[6]	[5]
	F-1-7
	T-1-4
[1] [Hook] key	[4] [Address Book] key
[2] [Recall/Pause] key	[5] R key
[3] [Coded Dial] key	[6] One-Touch Speed Dial keys

1.1.2 Safety

1.1.2.1 Safety of the Host Machine's Laser Mechanism i-SENSYS MF4690PL / / i-SENSYS MF4660

Laser radiation can prove to be harmful to the human body. The host machine's laser scanning system is completely sealed by means of a protective housing and external covers so that its light will not leak outside the host machine as long as the host machine is used normally.

1.1.2.2 CDRH Regulations

i-SENSYS MF4690PL / / i-SENSYS MF4660

The Center for Devices and Radiological Health (CDRH) of the US Food and Drug Administrator put into forth regulations that relate to laser products on August 2nd, 1976.

These regulations apply to laser products produced on and after August 1st, 1976, and prohibit the sale of laser products without certification.

1-5

Chapter 1

The following labels certify compliance with the CDRH regulations, and must be attached to all laser products that are sold in the US.

CANON

30-2, SHIMOMARUKO, 3-CHOME, OHTAKU, TOKYO, 146, JAPAN.

MANUFACTURED:

THIS PRODUCT CONFORMS WITH DHHS RADIATION

PERFORMANCE STANDARD 21CFR CHAPTER 1

SUBCHAPTER J.

F-1-8

1.1.2.3 Handling of the Laser Assembly i-SENSYS MF4690PL / / i-SENSYS MF4660

Invisible laser beam is radiated within the laser scanner unit. Laser beam radiation may pose damage to eyes. Be sure not to disassemble the laser scanner unit. The host machine's laser scanner unit cannot be adjusted in the field. The label [1] shown in the figure below is attached onto the cover of the laser scanner unit.

[1]

F-1-9

1.1.2.4 Safety of the Toner i-SENSYS MF4690PL / / i-SENSYS MF4660

Toner in General

Toner is a non-toxic material made up of plastic, iron, and small amounts of dye.

Do not throw toner into fire. Doing so can lead to explosion.

Contact with Toner

1.Toner on the skin or clothes must be removed by washing with water immediately.

2.The use of warm water must be avoided, doing so will cause the toner to turn gel-like and to permanently fuse with the fibers of the clothes.

3.Contact with vinyl must also be avoided, as toner can readily react.

1.1.2.5 Fire Attention

i-SENSYS MF4690PL / / i-SENSYS MF4660

It is dangerous to throw the parts that include combustible materials such as lithium battery and toner cartridge etc., into fire. Any used battery must always be disposed according to the appropriate local regulations.

1.1.2.6 Points no Note when Replacing / Disposing the Lithium Battery i-SENSYS MF4690PL / / i-SENSYS MF4660

Replacing to wrong type of battery may cause explosion.

Dispose used battery according to the instruction manual.

1-6

Chapter 1

1.1.3 Product Specifications

1.1.3.1 Host Machine Specifications i-SENSYS MF4690PL / i-SENSYS MF4660

Copyboard	Fixed

Body	Desktop (ADF standard type)

Light source type	LED

Image reading method	Contact Sensor Reading Method

Photosensitive medium	OPC drum

Reproduction method	Indirect electrostatic copying method

Exposure method	Semiconductor laser

Charging method	Roller contact charging method

Development method	Dry system - element jumping development method

Transfer method	Roller transfer method

Separation method	Electrostatic separation (neutralizing needle) and curvature separation

Pickup method	Cassette pick-up: 1 cassette
	Multi manual feeding pick-up

Cassette pickup method	Pad separation method

Multifeeder pickup method	Pad separation method

Drum cleaning method	Rubber blade

Fixing method	On-demand fixing

Toner supply type	By drum style toner cartridge

Toner type	Magnetic negative toner

Toner save mode	Yes

Original type	Sheets, books, solids (up to 2 kg)

Maximum original size	Fixed: 216mm x 297mm
	ADF: 216mm x 356mm

Reproduction ratio	1 to 1 + / - 1.0 %, 1 to 2.00, 1 to 1.29, 1 to 0.78, 1 to 0.64, 1 to 0.50
	Zoom: 0.50 to 2.00 (specified by the percent)

Reading resolution	<TEXT/PHOTO>: 300 dpi x 300 dpi
	<TEXT>, <PHOTO>, <TEXT/PHOTO+>: 600 dpi x 600 dpi

Printing resolution	600 x 600 dpi

Warm-up time	9.0 seconds or less*
	(temperature: 20 deg C, humidity: 65%. From when turning on the main
	power of this product until the standby screen is displayed)
	*Warm-up time may vary according to use condition of this product and
	environment)

First print time	8.5 seconds or less (A4/LTR)

Print speed	Approximately 20 sheets / minute (A4)
	Approximately 21 sheets / minute (LTR)
	Double-sided:
	Approximately 5 sheets / minutes

Cassette paper size	LTR, LGL, A4, B5, A5, Executive, Envelope (COM10, Monarch,
	DL,ISO-C5), Oficio, Brazil-Oficio, Mexico-Oficio, Folio, Government-
	LTR, Government-LGL, Foolscap (76 x 127 to 216 x 356 mm)

Multifeeder paper size	LTR, LGL, A4, B5, A5, Executive, Envelope (COM10, Monarch,
	DL,ISO-C5), Oficio, Brazil-Oficio, Mexico-Oficio, Folio, Government-
	LTR, Government-LGL, Foolscap (76 x 127 to 216 x 356 mm)
	*For 2-sided prints, only for 64 to 80g/m2-A4/LTR

Cassette paper type	Plain paper (64 to 90g / m2), thick paper (105 to 128g / m2), recycled
	paper (64 to 80g / m2), transparency, label, envelop, and postcard

Multifeeder tray paper type	Plain paper (64 to 90g / m2), thick paper (105 to 128g / m2), recycled
	paper (64 to 80g / m2), transparency, label, envelop, and postcard

Cassette capacity	250 sheets (80g / m2 paper)
Multifeeder tray capacity	10 sheets (plain paper: 80g / m2 paper)
	1 sheet (transparency, envelop)

Delivery tray stack	100 sheets (plain paper: 80g / m2 paper)
	50 sheets (thick paper: 91 to 105g / m2 paper)
	30 sheets (thick paper: 106 to 128g / m2 paper)
	10 sheets (label, transparency, envelop, postcard)

Continuous reproduction	1 to 99 sheets

Energy save mode	Yes. (Manual ON / OFF, automatically OFF after a set period of time,
	automatically ON when receiving facsimile / print data)

Network	Yes

PDL	UFRII LT, PCL5 / PCLXL

1-7

Chapter 1

SEND	MF4660: No
	MF4690: Yes

Operating environment	15 to 30 degrees C
(temperature range)

Operating environment	10 to 80 %
(humidity range)

Operating environment	0.16 to 1.01 hPa (0. 6 to 1 bar)
(atmospheric pressure)

Power supply rating	220V-240V (50/60Hz)

Power consumption (maximum)	Maximum consumption: less than 730W

Power consumption	During operation: approximately 340W or less (reference value)
	At standby: approximately 12W (referenve velue)In sleep mode:
	approximately 3W (reference value)

Ozone	Maximum: less than 0.05 ppm, average: less than 0.02 ppm

Dimensions	390mm (W) x 442mm (D) x 470mm (H) (with original pick-up tray)

Weight	Approximately 13.4kg (including toner cartridges)

1.1.3.2 ADF Specifications i-SENSYS MF4690PL / / i-SENSYS MF4660

Original orientation	Face-up method
Original position	center reference

Original processing mode	1-sided to 1-sided copy, 1-sided to 2-sided copy

Original reading	stream reading method

Stack	35 sheets (80 g/m2 or less)
	15 sheets (LGL size)

Mixed original sizes	No

Original AE detection	No

Original size recognition	No

Stamp	No

Operating environment	pursuant to the host machine

1.1.3.3 FAX Specifications i-SENSYS MF4690PL /

Applicable lines	Analog line (single line)
	- Telephone subscriber line (PSTN)

Transmission method	Half-duplex communication

Modulation method	<G3 image signal>
	ITU-T V.27 ter (2.4Kbps, 4.8Kbps)
	ITU-T V.29 (7.2Kbps, 9.6Kbps)
	ITU-T V.17 (TC7.2Kbps, TC9.6Kbps, 12Kbps, 14.4Kbps)
	ITU-T V.34 (2.4Kbps, 4.8Kbps, 7.2Kbps, 9.6Kbps, 12Kbps, 14.4Kbps,
	16.8Kbps, 19.2Kbps, 21.6Kbps, 24Kbps, 26.4Kbps, 28.8Kbps,
	31.2Kbps, 33.6Kbps)
	<G3 procedure signal>
	ITU-T V.21 No.2 (300bps)
	ITU-T V.8, V.34 (1200bps)

Transmission speed	33.6Kbps, 31.2Kbps, 28.8Kbps, 26.4Kbps, 24Kbps, 21.6Kbps,
	19.2Kbps, 16.8Kbps, 14.4Kbps, 12Kbps, TC9.6Kbps, TC7.2Kbps,
	9.6Kbps, 7.2Kbps, 4.8Kbps, 2.4Kbps
	With automatic fallback function

Coding	MMR, MR, MH, JBIG

Error correction	ITU-T ECM

Minimum receive input level	V.17, V.27ter, V.29: -6 to -43 dBm
	V.34: -10 to -43 dBm

Modem IC	CONEXANT DFX336

Scanning line density	Standard: 8 dots / mm x 3.85 lines / mm
	Fine: 8 dots / mm x 7.7 lines / mm
	Super fine: 8 dots / mm X 15.4 lines / mm
	Ultra fine: 16 dots / mm X 15.4 lines / mm

Half tone	256 gradation sequence

Printing resolution	600 dpi x 600 dpi

Reduction for reception	Fixed reduction: 90%, 95%, 97%, 75%
	Automatic reduction: 75 to 100%

FAX/TEL switching	Yes

Answering machine connection	Yes
Remote reception	ID entry method
	ID: 2 digits (default is 25)

Auto dialing	One-touch dial: 8
	Speed dial: 192
	Group dial: Maximum 199

1-8

Chapter 1

Delayed transmission	No
Broadcast transmission	Number of Destination: Maximum 201

Dual access	Number of reservations: 70 max.

Image data backup	backup particulars: memory reception, memory transmission, broadcast
	image data
	backup IC: 128 MB (SDARAM)
	Backup battery: rechargeable capacity
	backup length: about 1 hour

1-9

Chapter 2 Basic Operation

Contents

2.1	Construction ...................................................................................................................................................................	2-1
2.1.1 Function Configuration................................................................................................................................................................		2-1
2.2	Basic Sequence ..............................................................................................................................................................	2-1
2.2.1 Basic Operation Sequence ...........................................................................................................................................................		2-1

Chapter 2

2.1 Construction

2.1.1 Function Configuration i-SENSYS MF4690PL / / i-SENSYS MF4660

The functions of this host machine are mainly composed of the 7 blocks: System

Control System, Scanning Control System, Printer Control System, Laser Scanner System, Image Formation System, Fixing System, Pickup/Feeding System. Below is the block diagram.

System Control

System

Printer Control

System

Scanning Control System

Laser / Scanner System

Image Formation System

Fixing System

Pickup / Feeding System

F-2-1

2.2 Basic Sequence

2.2.1 Basic Operation Sequence i-SENSYS MF4690PL / / i-SENSYS MF4660

The operations of this host machine are controlled by CPUs of the SCNT board within the Reader Controller System and the DCNT board within the Engine Control System. The table below shows the purpose of each interval and the outline of the operations of reader unit and the engine from turnon of the power supply to stop of each motor after printing.

T-2-1

interval name	definition of interval	purpose	remarks
WAIT (wait)	Interval between turnon of the	To clear the drum surface potential	Presence/absence of cartridge is detected during this interval.
	power supply and the end of the	and to execute the cleaning of
	initial drive	transfer charging roller

STBY (standby)	Interval between the end of WAIT	To make the host machine ready for
	or LSTR and input of print	printing
	command from SCNT board, or
	interval between the end of LSTR
	and turnoff of power supply

INTR (initial rotation)	Interval between the input of print	To stabilize the photosensitive drum
	command from SCNT and turnon	as a preparation for printing
	of the pickup solenoid	Also to clean the transfer charging
		roller

PRINT (print)	Interval between the end of initial	To form an image onto the
	rotation and turnoff of the primary	photosensitive drum based on the
	high-voltage output	video signal input from the SCNT
		board and to transfer the toner image
		onto media

LSTR (last rotation)	Interval between turnoff of the	To fully deliver the final sheet	On input of print command from the SCNT board, host machine
	primary high-voltage output and	printed	enters INTR immediately after LSTR. However, depending on the
	stop of the main motor	Also to clean the transfer charging	conditions shown below, the host machine may not start INTR
		roller	immediately.
			-media size
			-temperature of the fixing assembly

2-1

Chapter 3 Original Exposure System

Contents

3.1 Basic Constraction .........................................................................................................................................................	3-1
3.1.1 Specifications / Control / Function List .......................................................................................................................................	3-1
3.1.2 Major Components.......................................................................................................................................................................	3-1
3.2 Various Control..............................................................................................................................................................	3-2
3.2.1 Dirt Sensor Control ......................................................................................................................................................................	3-2
3.2.1.1 Outline.............................................................................................................................................................................................................	3-2
3.3 Parts Replacement Procedure.........................................................................................................................................	3-4
3.3.1 Scanner Unit.................................................................................................................................................................................	3-4
3.3.1.1 Preparation for Removing the Control Panel Assembly .................................................................................................................................	3-4
3.3.1.2 Removing the Control Panel Assembly ..........................................................................................................................................................	3-4
3.3.2 Book Motor..................................................................................................................................................................................	3-4
3.3.2.1 Preparation for Removing the Flat Bed Motor ...............................................................................................................................................	3-4
3.3.2.2 Removing the Flat Bed Motor.........................................................................................................................................................................	3-4
3.3.3 Contact Sensor .............................................................................................................................................................................	3-5
3.3.3.1 Removing the Contact Sensor.........................................................................................................................................................................	3-5

Chapter 3

3.1 Basic Constraction

3.1.1 Specifications / Control / Function List i-SENSYS MF4690PL / / i-SENSYS MF4660

	T-3-1
item	function / method

document exposure	LED
document scan	Book mode: scan by the shift of the contact Book mode: scan by the shift of the contact sensor (CS)
	ADF: document stream reading by fixed contact sensor (CS)
scanning resolution	600 dpi (horizontal scanner) X 600 dpi (vertical scanner)
number of gradations	256 gradations
magnification	50% to 200%
	horizontal: image processing by SCNT board
	vertical: change of carriage shift speed, image processing by SCNT board
lens	rod lens array
CMOS sensor	number of lines: 1 line
	number of pixels: 5184 pixels as total pixels (5107 pixels as effective pixels)
	maximum document scanning width: 216 mm
CS drive control	drive control by Book motor (M2)
CS HP detection	Yes
document size detection	none
Dirt sensor detection	Yes

3.1.2 Major Components

i-SENSYS MF4690PL / / i-SENSYS MF4660

Followings are the major components for Document Exposure System.

-The contact sensor to scan document

-The Book motor (M2), the drive pulley, the drive belt, to shift the contact sensor

In image scanning control, the contact sensor is shifted by rotating the Book motor based on the drive signal from the DCNT board and scan the original on the copyboard glass. When ADF is in use, image is scanned by feeding the originals by ADF instead of shifting the contact sensor.

drive belt

drive pulley

Book motor (M2)

drive pulley	contact sensor
	F-3-1

3-1

Chapter 3

3.2 Various Control

3.2.1 Dirt Sensor Control

3.2.1.1 Outline

i-SENSYS MF4690PL / / i-SENSYS MF4660

The machine changes the original read position or corrects the read image depending on the presence/absence of dust on the stream reading glass or ADF platen roller, thus preventing dust from showing up in the image. This control is performed only when the ADF is used and it is closed.

[Control Timing]

- At job end

Main power		Start key
	switch	Start key
	ON	ON

	WMUPR	STBY

1st		2nd
1st		2nd
SCAN		SCAN

Dust detection control

F-3-2

[Description of Control] - At job completion:

The contact sensor (CS) detects the reflecting light from the surface of the ADF platen guide at scanning position to judge if there is dust at the point.

After the job is complete, dust detection is performed three times. First the detection is performed at "A" position and if there is no dust, then it is performed twice more. If no duct is detected for three times, the document is scanned at "A" position. In case the dust is detected at "A" position, it moves to "B" position to perform dust detection twice. If no dust is detected at "B" position, the document is scanned at "B" position. In case the dust is also detected at "B" position, it moves to "C" position to perform dust detection once. In case the dust is also detected at "C" position, it returns to "A" position to scan the document.

- In the control at job completion, if dust is detected at all three positions (A/B/C), a message is displayed on the control panel to encourage cleaning of glass surface.

0.5mm 0.5mm

A B C

Stream
reading glass	Platen guide
	Platen guide

Lens

LED

Contact sensor

F-3-3

The original is read at the position determined at job end or start. If presence of dust is detected there, the read image is corrected.

3-2

Chapter 3

T-3-2

Position Description

AReference position for scanning

BApprox. 0.5mm from the reference point

CApprox. 1.0mm from the reference point

3-3

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