Canon iR1600, iR2000 Service Manual adf j1

ADF-J1

REVISION 0

SEPT . 2001

FY8-13HK-000

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

Imprimé au Japon

Caution

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

INTRODUCTION

Memo

1 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).

REF.

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.

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.

Refers to the Copier Basics Series for a better understanding of the contents.

2001 CANON INC. 2001 2001 2001 2001 CANON ADF-J1 REV.0 SEPT. 2001

INTRODUCTION

2 Outline of the Manual

This Service Manual contains basic facts and figures needed to service the ADF-J1 in the

field, and it consists of the following chapters:

Chapter 1 General Description: features, specifications, methods of operation Chapter 2 Outline of Operation: mechanical systems by function, electrical systems

in reference to principles of operation, timing of operation; construction and outline of electrical circuitry

Chapter 3 Mechanical Systems construction of mechanical systems; disassembly,

assembly, and adjustments

Chapter 4 Maintenance and Inspection:

periodically replacement parts, durables and

consumables; scheduled servicing chart Chapter 5 Troubleshooting standards, adjustments, troubleshooting tables Appendix: general timing chart, list of signals/abbreviations,

general circuit diagrams

For installation, refer to the Installation Procedure found in the shipping box; this manual

omits descriptions of the installation work.

2001 CANON INC. 2001 2001 2001 2001 CANON ADF-J1 REV.0 SEPT. 2001

INTRODUCTION

The descriptions in this Service Manual are based on he following rules:

1. In each chapter, the uses of the function in question and its relationship to electrical and mechanical systems are discussed and the timing of operation of its associated parts is explained by means of outlines and diagrams. In the diagrams, the symbol

represents a mechanical path, while the symbol

with a name next to it indicates the flow of an electric signal. The expression “turn on the power” means turning on the power switch, closing the front door, and closing the delivery door so that the machine will be supplied with power.

2. In circuit diagrams (digital), a signal whose level is High is expressed as being ‘1’, while a single whose level is Low is expressed as being ‘0’; the level of voltage, however, varies from circuit to circuit. The machine uses CPUs, whose internal mechanisms cannot be checked in the field, and, therefore, are not explained. In addition, the machine’s PCBs are not intended for repairs at the user’s and, therefore, are explained by means of block diagrams: two types are used, i.e., between sensors and inputs of PCBs equipped with a control or drive function and between outputs equipped with a control or drive function and loads; in addition, functional block diagrams are used at times.

Changes made to the machine for product improvement are communicated in the form of a Service Information bulletin as needed. All ser vice persons are expected to go through all service documentation including the bulletins and be equipped to respond to the needs of the field (as by being able to identify possible causes of problems).

2001 CANON INC. 2001 2001 2001 2001 CANON ADF-J1 REV.0 SEPT. 2001

iii

Contents

CHAPTER 1 GENERAL DESCRIPTION

1 Features............................................... 1-1

2 Specifications...................................... 1-2

2.1 Specifica tions ............................. 1-2

3 Names of Components........................1-3

3.1 External View............................. 1-3

3.2 Cross Section ............................. 1-4

4 Using the Machine .............................. 1-5

4.1 Routine Maintenance by the User 1-5

CHAPTER 2 OUTLINE OF OPERATION

1 Basic Construction.............................. 2-1

1.1 Outline of the Electrical Circuitry 2-1

1.2 Inputs to and Outputs from the

ADF Drive PCB......................... 2-2

2 Basic Operations ................................. 2-3

2.1 Outline ....................................... 2-3

2.2 Sequence of Operation...............2-4

2.2.1 Outline ................................. 2-4

2.2.2 Picking Up and Delivering Originals (Single-sided original

→ Single-sided print) .......... 2-4

2.3 Detecting Originals .................... 2-5

2.3.1 Outline ................................. 2-5

2.3.2 Detecting the Presence/Absence

of an Original....................... 2-6

2.3.3 Detecting the Last Original . 2-6

2.3.4 Detecting the Size of an

Original ................................ 2-7

2.4 Picking Up and Separating an

Original .................................... 2-10

2.4.1 Basic Pickup Operation ..... 2-10

2.4.2 Separation/Pickup

Mechanism ........................ 2-13

2.4.3 Sequence of Pickup

Operation ........................... 2-19

2.4.4 Pickup Unit and the Stopper 2-1 9

2.4.5 Controlling the Feed Motor

(M1) ................................... 2-20

3 Jams .................................................. 2-21

3.1 Outline ..................................... 2-21

3.2 Jam/Error Report ...................... 2-21

3.2.1 Generating a Jam/Error

Report ................................ 2-21

3.2.2 List of Jam Codes .............. 2-22

4 Power Supply.................................... 2-23

2001 CANON INC. 2001 2001 2001 2001 CANON ADF-J1 REV.0 SEPT. 2001

CHAPTER 3 MECHANICAL SYSTEMS

CONTENTS

1 Basic Construction.............................. 3-1

1.1 External Covers.......................... 3-1

1.1.1 Removing the Front Cover .. 3-2

1.1.2 Removing the Rear Cover ... 3-2

1.1.3 Removing the Feeder Cover 3-2

2 Pickup System .................................... 3-3

2.1 Separation Roller Unit ............... 3-3

2.1.1 Removing the Separation

Roller Unit ........................... 3-3

2.1.2 Mounting the Separation

Roller Unit ........................... 3-4

2.2 Separation Pad ........................... 3-5

2.2.1 Removing the Pre-Separation

Pad/Separation Pad .............. 3-5

3 Drive System....................................... 3-6

3.1 Feeder Motor .............................. 3-6

3.1.1 Removing the Feeder Motor 3-6

3.2 Drive System .............................. 3-7

3.2.1 Removing the Feeder Unit...3-7

3.2.2 Removing the Clutch ........... 3-9

3.2.3 Disassembling the Feeder

Drive Assembly ................. 3-11

3.2.4 Removing the Platen

Roller ................................. 3-12

3.2.5 Removing the Feeder

Roller ................................. 3-13

3.2.6 Remove the Feeder

Roller 2 .............................. 3-15

3.2.7 Removing the Pull-Off

Roller .................................3-16

3.2.8 Adjusting the Platen

Guide L ............................. 3-17

4 Electrical Systems............................. 3-18

4.1 ADF Driver PCB...................... 3-18

4.1.1 Removing the ADF Driver

PCB.................................... 3-18

4.2 Sensors in the Feeder Unit....... 3-18

4.2.1 Removing the Sensor Unit. 3-18

4.2.2 Removing the Sensors ....... 3-19

4.3 Sensors in the Original Pickup

Tray .......................................... 3-19

4.3.1 Removing the Original Width

Sensor ................................ 3-19

4.3.2 Mounting the Slide Guide

Gear Plate .......................... 3-20

CHAPTER 4 MAINTENANCE AND INSPECTION

1 Periodically Replaced Parts ................ 4-1

2 Durables and Consumables ................ 4-1

3 Scheduled Servicing Chart ................. 4-1

4 Replacement ....................................... 4-2

2001 CANON INC. 2001 2001 2001 2001 CANON ADF-J1 REV.0 SEPT. 2001

4.1 Replacing the Feed Roller Guide

(dust-collecting tape) ................. 4-2

4.2 Replacing the Stamp .................. 4-2

CONTENTS

CHAPTER 5 TROUBLESHOOTING

1 Standards and Adjustments.................5-1

1.1 Basic Adjustments...................... 5-1

1.1.1 Adjusting the Height............ 5-1

1.1.2 Adjusting the Right Angle ... 5-2

1.1.3 Adjusting the Read

Position ................................ 5-5

1.1.4 Adjusting the Ratio

Mechanism .......................... 5-6

1.1.5 Adjusting the Horizontal

Registration..........................5-7

1.1.6 Adjusting the Leading Edge

Registration........................5-10

2 Troubleshooting Malfunctions .......... 5-12

2.1 Troubleshooting Malfunctions . . 5-12

APPENDIX

2.1.1 Pickup Fault ....................... 5-12

2.1.2 The output has black lines in

sub scanning direction ....... 5-12

2.1.3 The output has blurred

images ............................... 5-14

2.1.4 The output is out of focus or

has black fogging............... 5-14

3 Arrangement of Electrical

Components ..................................... 5-15

3.1 Sensors ..................................... 5-15

3.2 Motors, Clutches, Solenoids,

PCBs, and Others ..................... 5-16

4 Self Diagnosis ................................... 5-17

4.1 Outline ..................................... 5-17

1 General Timing Charts....................... A-1

1.1 Flow-Scanning a Single-sided A4

Document .................................. A-1

2 Signal Name/Designation List ........... A-3

3 General Block Diagram ..................... A-5

4 ADF Controller Block Diagram ........ A-6

5 Jam Code List .................................... A-7

6 Special Tools List............................... A-8

7 Solvent/Grease List............................ A-8

2001 CANON INC. 2001 2001 2001 2001 CANON ADF-J1 REV.0 SEPT. 2001

CHAPTER 1

GENERAL DESCRIPTION

2001 CANON INC. 2001 2001 2001 2001 CANON ADF-J1 REV.0 SEPT. 2001

CHAPTER 1 GENERAL DESCRIPTION

1 Features

a.Exclusive Use for Stream Reading

The machine is designed for reading all originals in stream reading mode.

b.Control by the Host Machine

The machine is not equipped with a controller PCB, and is directly controlled by its host

machine.

c.Original Size Detection

The machine is able to identify the size of originals based on length (feed direction) and

width for communication to its host machine.

d.Extra-Length Mode

When extra length mode is selected, the machine will read an original as long as 1000

mm in length.

e.Mixed Original Sizes (of the same width)

The machine accepts 2 different sizes of originals*.

* Must not be of different configurations.

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

1-1

CHAPTER 1 GENERAL DESCRIPTION

2 Specifications

2.1 Specifications

Item

Method of original pickup Orientation of original Placement of original Method of original separation Type of original

Size of original

Original tray

Delivery assembly Original handling Identification of original size Detection of residual original Originals of mixed sizes Communication with host machine Power supply Weight Dimensions

Serial number

Operating environment

Temperature Humidity

Specifications

Auto pickup/delivery

Original tray: Face-up Original tray: Center reference Top separation

Single-sided original: Continuous feeding (52 to 105 g/m Single feeding (38 to 128 g/m Book Original: 40 mm/1.57 in height AB: B6/A5/B5/A4/A5R/B5R/A4R/

B4/A3

Inch: STMT/LTR/LTRR/LGL/11"x 17"

Width: 148 mm/5.83 in (A5R) to 297 mm/11.7 in (A3) Length:128 mm/5.04 in (STMT) to 432 mm/17 in (11" x 17") 50 sheets (small size) 25 sheets (large size) 50 sheets Single-sided original Yes (default size only)

Yes (in association with host machine)

Yes (if of same configuration) Directly controlled by host machine

24 VDC, 5 VDC; from host machine

7.1 kg/15.6 lb (approx.) 592 x 484 x 22 mm/23.3 x 19.1 x 0.87 in (W x D x H) A-configuration: XGKxxxxx Inch/A-configuration: XGJxxxxx AB-configuration: XGHxxxxx AB-configuration: XGLxxxxx

Same as host machine Same as host machine

)

Remarks

If 432 mm/17.0 in or

or less.

longer, 60 to 90 g/m

In extra-length mode, as long as 1000 mm/39.4 in.

Paper of 80 g/m Paper of 80 g/m Paper of 80 g/m

1-2

T01-201-01

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

3 Names of Components

3.1 External View

CHAPTER 1 GENERAL DESCRIPTION

[2]

[1]

[3]

F01-301-01

[4]

[6]

[5]

[1] Feeder cover [2] Rear cover [3] Slide guide

[4] Original pickup tray [5] Front cover [6] Original delivery assembly

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

1-3

CHAPTER 1 GENERAL DESCRIPTION

3.2 Cross Section

[1] [5]

[2]

[8] [7][9]

[3]

[4]

[6]

F01-302-01

[1] Pull-off roller [2] Separation roller [3] Separation pad [4] Pickup roller [5] Original pickup tray

[6] Delivery roller [7] Feeding roller 2 [8] Platen roller [9] Feeding roller 1

1-4

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

CHAPTER 1 GENERAL DESCRIPTION

4.Using the Machine

4.1 Routine Maintenance by the User

Instruct the user to clean the following component about once a month:

Component

Copyboard glass

Copyboard glass retainer Vertical size plate

Platen roller White plate (copyboard cover)

Wipe with a cloth moistened with water or alcohol; then, dry wipe.

Description

T01-401-01

To clean, go through the following:

1) Clean the copyboard glass, copyboard glass retainer, and vertical size plate with a cloth moistened with water; then, dry wipe them with a dry, soft cloth.

Remarks

• Parts of the reader assembly.

2) Wipe the platen roller and the copyboard cover with a cloth moistened with water; then dry wipe them with a dry, soft cloth.

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

F01-401-01

F01-401-02

1-5

CHAPTER 2

OUTLINE OF OPERATION

2001 CANON INC. 2001 2001 2001 2001 CANON ADF-J1 REV.0 SEPT. 2001

CHAPTER 2 OUTLINE OF OPERATION

1 Basic Constr uction

1.1 Outline of the Electrical Circuitry

The machine is not equipped with a controller PCB; it, however, has a driver PCB. Its electrical mechanisms are controlled by the controller PCB of its host machine (CPU identified as IC1).

The CPU of the host machine interprets the input signals from sensors, and sends signals to the machine’s driver PCB to drive the loads (motor, clutch, solenoid) at such times as programmed in advance.

ADF Driver PCB

Motor

Sensor

drive

signal

Controller

PCB

Driver IC

(IC1)

Power supply

Host machine

Clutch

Solenoid

+24V

Sensor

J2-1,2

PCB

F02-101-01

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

2-1

CHAPTER 2 OUTLINE OF OPERATION

1.2 Inputs to and Outputs from the ADF Drive PCB

Inputs to and Outputs from the ADF Driver

Last original detection sensor

Length sensor 1

Length sensor 2

Original width sensor 1

Original width sensor 2

Original placement sensor

PI1

PI2

PI3

PI4

PI5

PI6

J21-3

J22-3

J23-3

J24-3

J25-3

J26-3

-2

-1

-2

-1

-2

-1

-2

-1

-2

-1

-2

J102-1

-10

-12

-11

-13

-15

-14

+3.3VE

Relay PCB

J101

-7

-6

-5

-4

-3

-2

-1

J3-1

J6-1

-2

-3

-4

-5

-6

-7

-9

-8

J5-1

-2

-3

-2

-3

-4

-3

-2

LENG1

LENG2 LENG3

WID1

WID2

SET

ADF driver PCB

+3.3VE

When paper is present, '1'.

Detects paper width.

+3.3VS

When paper is present, '0'.

Registration sensor

Read sensor

Cover open/closed sensor

Stamp solenoid

Pickup clutch

Feeder motor

PI7

PI8

PI9

SL1

CL1

J27-3

J28-3

J31-3

-10

-12

-11

J7-1

J8-1

J4-1

-4

-6

-5

-7

-9

-8

-2

-3

-4

-5

-6

+3.3VE

REG

+3.3VE

READ

+3.3VE

DFCVS

+24V

STAMP_SL

+24V

MOTA MOTA* MOTB MOTB*

When paper is present, '1'.

When the ADF cover is opened, '1'.

When '0', SL1 goes ON.

When '0', CL1 goes ON.

For details, see p. 2-20.

J30

-2

-1

-2

-1

-2

-1

-2

-1

-3

-2

-4

-6

-5

-1

-2

-1

-2

-3

J13

J201

-4

-1

-3

-1

-2

-1

-3

-2

-1

2-2

F02-102-01

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

CHAPTER 2 OUTLINE OF OPERATION

2.Basic Operations

2.1 Outline

The machine is designed exclusively for stream reading.

The machine uses a single motor to pick up and move originals.

Name (Notation)

Feeder motor (M1)

Moves originals.

T02-201-01

The following is a drive diagram of the machine:

ADF driver PCB

Function

PI8

CL1

Original placement signal (SET) J5-3

PI6

Stamp solenoid drive signal (STP_SL) J7-2

SL1

Last original detection signal (LENG1) J3-3

PI1

Original width detection signal 2 (WID2) J6-4

PI5

Original width detection signal 1 (WID1) J6-3

PI4

Original detection signal (READ) J5-9

Original detection signal (REG) J5-6

PI7

Feed motor drive signal (FMOT) J4

Pickup clutch drive signal (CL) J8-2

F02-201-01

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

Original length detection signal 1 (LENG2) J6-1

PI2

Original length detection signal 2 (LENG3) J6-2

PI3

2-3

CHAPTER 2 OUTLINE OF OPERATION

2.2 Sequence of Operation

2.2.1 Outline

The machine does not possess a reversing mechanism, and picks up and delivers originals

as they are.

2.2.2 Picking Up and Delivering Originals (Single-sided original → Single-sided pr int)

The machine moves the original as follows:

Original

Separation

Pickup

Reading

Delivery

2-4

Read timing detection

F02-202-01

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

CHAPTER 2 OUTLINE OF OPERATION

2.3 Detecting Originals

2.3.1 Outline

The machine possesses the following 3 original detection mechanisms:

Item

Original detection

Last original detection

Initial original size detection

• Feed direction

• Width direction

Description

Detects the presence/absence of an original in the original pickup tray . Determines whether the original being fed is a last original.

Detects the length of the original placed in the original pickup tray .

• Identification between small size and large size Detects the width of the original placed in the original pickup tray .

T02-203-01

Sensor used (Notation)

Original placement sensor (PI6)

Last original sensor (PI1) Registration sensor (PI7)

Length sensor 1/2 (PI1/PI2)

Original width sensor 1/2 (PI4/ PI5)

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

2-5

CHAPTER 2 OUTLINE OF OPERATION

2.3.2 Detecting the Presence/Absence of an Original

The presence/absence of an original in the original tray is detected by the original placement sensor (PI6). The detecting lever operates in conjunction with the light-blocking plate. When an original is placed in the original tray, the light from the photointerrupter is blocked, thereby causing the original placement sensor (PI6) to generate the original placement signal (SET).

ADF driver PCB

SET

PI6

Original

F02-203-01

2.3.3 Detecting the Last Original

The last original sensor (PI1) and the registration sensor (PI7) are used to find out whether or not the original being picked is the last original.

When the last original has been picked up and its trailing edge moves past the last original detecting lever, the detecting lever blocks the light of the photointerrupter while operating in association with the light-blocking plate. At this time, if the leading edge of the original is as far as the registration sensor (PI7), the last original sensor (PI1) generates the last original detection signal (LENG1) to communicate to the host machine that the original in question is the last from the stack in the original tray.

2-6

PI7

ADF driver PCB

LENG1

PI1

F02-203-02

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

CHAPTER 2 OUTLINE OF OPERATION

2.3.4 Detecting the Size of an Original

a.Detecting the Length in Feed Direction

The length of an original in feed direction is detect by the length sensor 1 (PI1) and the length sensor 2 (PI2). When an original is placed in the original tray, the detecting levers of these 2 length sensors operate in conjunction with the light-blocking plate to block the light of the photointerrupter.

In mixed original size mode, however the length is detected based on the number of lines read by the scanner connected to it.

ADF driver PCB

Original

LENG3

LENG2

F02-203-03

PI2

Detecting lever

PI3

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

2-7

CHAPTER 2 OUTLINE OF OPERATION

b.Detecting the Width

The width of an original is detected using the width sensor 1 (PI4) and the width sensor 2 (PI5) found in the original tray in relation to the slide guide, whose movement will block or unblock the light of the photointerrupter.

ADF driver PCB

PI5

WID2

WID1

F02-203-04

PI4

2-8

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

CHAPTER 2 OUTLINE OF OPERATION

T02-203-02 shows the relationship between the length sensor signals and the sizes or

originals.

AB-Configured Paper

Width sensor 1 (PI4) Width sensor 2 (PI5) Length sensor 1 (PI2) AB-configuration

1 0 0 A5R 1 0 1 B5R 00 0A5 0 0 1 A4R 01 0B5 0 1 1 B4R 11 0A4 1 1 1 A3R

Inch-Configured Paper

Width sensor 1 (PI4) Width sensor 2 (PI5) Length sensor 2 (PI3) Inch-configuration

1 0 0 LTRR 1 0 1 LGL 00 0LTR 0 0 1 11”x17”

T02-203-02

PI5

PI4

PI3

PI2

F02-203-05

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

2-9

CHAPTER 2 OUTLINE OF OPERATION

2.4 Picking Up and Separating an Original

2.4.1 Basic Pickup Operation

When an original is placed in the original tray and the Start key is pressed, the machine will go through the following sequence:

a.Pickup

When the electromagnetic clutch goes ON and the feed motor (M1) rotates clockwise, the pickup roller moves down, and the separation roller and the pickup roller start to rotate to pick up an original; then, the stopper moves up in conduction.

The pre-separation pad and the separation pad serve to prevent double feeding of originals.

CL1

Pre-separation pad

Stopper

Pickup roller

CL1

Original

Separation pad

F02-204-01

b.Feeding

The rollers found beyond the pull-off roller rotate at a speed about 50% higher than the separation roller. When the original reaches the pull-off roller, its movement grows faster, thereby causing the pickup roller and the separation roller to rotate in conjunction.

2-10

Pull-off roller

CL1

F02-204-02

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

CHAPTER 2 OUTLINE OF OPERATION

c.Stream Reading and Delivery

When the leading edge of the original reaches read wait position, the machine sends the image leading edge signal to its host machine to start stream reading; thereafter, the delivery roller operates to delivery the original.

In stream reading, the host machine’s scanner is fixed in place, and the original is moved over the scanner glass for scanning.

CL1

Scanning lamp

Read glass

F02-204-03

d.End of Pickup for the 1st Original

When the trailing edge of the original moves past the pickup roller, the pickup roller will come into contact with the 2nd original. However, since the separation roller is pulled by the 1st original at a higher speed than its drive shaft, the spring clutch mounted to the shaft slips, transmitting the drive and preventing the rotation of the pickup roller and, as a result, not picking up the 2nd original.

Rating

CL1

At reset

F02-204-04

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

2-11

CHAPTER 2 OUTLINE OF OPERATION

e.Picking Up the 2nd Original

When the trailing edge of the original leaves the separation roller, the spring clutch trans-

mits the drive, causing the pickup roller to rotate to pick up the 2nd original.

CL1

Scanning lamp

Read glass

F02-204-05

f. Returning the Pickup Roller to Standby Position

When the last original moves past the original sensor and a specific period of time passes

thereafter, the electromagnetic clutch goes OFF and the feed motor stops.

When the electromagnetic clutch goes ON and the feed motor starts to rotate in reverse, the pickup roller is returned to standby position, at the end of which the feeder motor and the electromagnetic clutch goes OFF.

CL1

2-12

F02-204-06

2001 CANON INC. 2000 2000 2000 2000 CANON ADF-J1 REV.0 SEPT. 2001

+ 70 hidden pages