Canon iR2016, iR2020 dadf-p1 Service Manual

Service Manual

Feeder

DADF-P1

Sep 14 2005

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.

translated into another language, in whole or in part, without the written consent of Canon Inc.

Printed in Japan

Caution

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

Symbols Used

This documentation uses the following symbols to indicate special information:

Symbol Description

Indicates an item of a non-specific nature, possibly classified as Note, Caution, or Warning.

Indicates an item requiring care to avoid electric shocks.

Indicates an item requiring care to avoid combustion (fire).

Indicates an item prohibiting disassembly to avoid electric shocks or problems.

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

Introduction

REF.

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

Provides a description of a service mode.

Provides a description of the nature of an error indication.

Introduction

The following rules apply throughout this Service Manual:

1. Each chapter contains sections explaining the purpose of specific functions and the relationship between electrical and mechanical systems with reference to the timing of operation.

In the diagrams, represents the path of mechanical drive; where a signal name accompanies the symbol , the arrow indicates the direction of the electric signal. The expression "turn on the power" means flipping on the power switch, closing the front door, and closing the delivery unit door, which results in supplying the machine with power.

2. In the digital circuits, '1'is used to indicate that the voltage level of a given signal is "High", while '0' is used to indicate "Low".(The voltage value, however, differs from circuit to circuit.) In addition, the asterisk (*) as in "DRMD*" indicates that the DRMD signal goes on when '0'. In practically all cases, the internal mechanisms of a microprocessor cannot be checked in the field. Therefore, the operations of the microprocessors used in the machines are not discussed: they are explained in terms of from 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 Specifications

1.1 Product Specifications ................................................................................................................................... 1- 1

1.1.1 Specifications ........................................................................................................................................... 1- 1

1.2 Names of Parts ............................................................................................................................................... 1- 2

1.2.1 External View............................................................................................................................................ 1- 2

1.2.2 Cross-section............................................................................................................................................ 1- 2

Chapter 2 Functions

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

2.1.1 Outline of Electric Circuit ........................................................................................................................ 2- 1

2.2 Basic Operation............................................................................................................................................... 2- 1

2.2.1 Drive Mechanism and Signals............................................................................................................... 2- 1

2.2.2 Outline of Operation Mode ..................................................................................................................... 2- 2

2.2.3 Forward Pickup/Delivery (Single-sided document > Simplex Printing) Operation ........................ 2- 2

2.2.4 Forward Pickup/Reversal Delivery (Double-sided document > Duplex printing) Operation........ 2- 2

2.3 Document Detection....................................................................................................................................... 2- 4

2.3.1 Outline ....................................................................................................................................................... 2- 4

2.3.2 Document Presence/Absence Detection ............................................................................................. 2- 4

2.3.3 Detection of Last Document................................................................................................................... 2- 4

2.3.4 Initial Document Size Detection ............................................................................................................ 2- 5

2.4 Document Pickup/Separation ....................................................................................................................... 2- 6

2.4.1 Basic Pickup Operation .......................................................................................................................... 2- 6

2.4.2 Pickup Unit and Stopper......................................................................................................................... 2- 7

2.4.3 Pickup Timing........................................................................................................................................... 2- 7

2.4.4 Pickup Motor (M2) Control ..................................................................................................................... 2- 7

2.5 Document Reversing...................................................................................................................................... 2- 8

2.5.1 Basic Operation........................................................................................................................................ 2- 8

2.5.2 Operation Sequence ............................................................................................................................... 2- 9

2.6 Document Feeding/Delivery.......................................................................................................................... 2- 9

2.6.1 Basic Operation........................................................................................................................................ 2- 9

2.6.2 Operation Sequence ............................................................................................................................. 2- 10

2.6.3 Feed Motor (M1) Control ...................................................................................................................... 2- 10

2.7 Detecting Jams ............................................................................................................................................. 2- 10

2.7.1 Jam .......................................................................................................................................................... 2- 10

2.8 Power Supply ................................................................................................................................................ 2- 11

2.8.1 Power Supply ......................................................................................................................................... 2- 11

2.9 Stamp Operation........................................................................................................................................... 2- 11

2.9.1 Outline ..................................................................................................................................................... 2- 11

Chapter 3 Parts Replacement Procedure

3.1 Removing from the Host Machine................................................................................................................ 3- 1

Contents

3.1.1 Feeder ........................................................................................................................................................3- 1

3.1.1.1 Removing from the Host Machine ..................................................................................................3- 1

3.2 External Covers...............................................................................................................................................3- 1

3.2.1 Front Cover................................................................................................................................................3- 1

3.2.1.1 Removing the Front Cover ..............................................................................................................3- 1

3.2.2 Rear Cover ................................................................................................................................................3- 1

3.2.2.1 Removing the Rear Cover ...............................................................................................................3- 1

3.2.3 Feeder Cover ............................................................................................................................................3- 1

3.2.3.1 Removing the Front Cover ..............................................................................................................3- 1

3.2.3.2 Removing the Feeder Cover ...........................................................................................................3- 2

3.3 Drive System....................................................................................................................................................3- 2

3.3.1 Pickup Motor..............................................................................................................................................3- 2

3.3.1.1 Removing the Rear Cover ...............................................................................................................3- 2

3.3.1.2 Removing the Pickup Motor ............................................................................................................3- 2

3.3.1.3 Installing the Pickup Motor ..............................................................................................................3- 2

3.3.2 Feed Motor ................................................................................................................................................3- 3

3.3.2.1 Removing the Rear Cover ...............................................................................................................3- 3

3.3.2.2 Removing the Feed Motor ...............................................................................................................3- 3

3.3.2.3 Installing the Feed Motor .................................................................................................................3- 3

3.3.3 Timing Belt/Pulley.....................................................................................................................................3- 3

3.3.3.1 Removing the Front Cover ..............................................................................................................3- 3

3.3.3.2 Removing the Feeder Cover ...........................................................................................................3- 3

3.3.3.3 Removing the Rear Cover ...............................................................................................................3- 4

3.3.3.4 Removing the ADF Driver PCB ......................................................................................................3- 4

3.3.3.5 Removing the Pickup Motor ............................................................................................................3- 4

3.3.3.6 Removing the Feed Motor ...............................................................................................................3- 4

3.3.3.7 Removing the Timing Belt................................................................................................................3- 4

3.4 Document Feeding System ...........................................................................................................................3- 5

3.4.1 Pickup Roller Unit .....................................................................................................................................3- 5

3.4.1.1 Removing the Front Cover ..............................................................................................................3- 5

3.4.1.2 Removing the Feeder Cover ...........................................................................................................3- 5

3.4.1.3 Removing the Pickup Roller Unit....................................................................................................3- 5

3.4.1.4 Precaution about Pickup Roller Unit Installation .........................................................................3- 6

3.4.2 Pickup Roller/Separation Roller .............................................................................................................3- 6

3.4.2.1 Removing the Front Cover ..............................................................................................................3- 6

3.4.2.2 Removing the Feeder Cover ...........................................................................................................3- 6

3.4.2.3 Removing the Pickup Roller Unit....................................................................................................3- 6

3.4.2.4 Removing the Pickup Roller and Separation Roller ....................................................................3- 6

3.4.3 Separation Plate/Separation Pad...........................................................................................................3- 7

3.4.3.1 Removing the Separation Pad ........................................................................................................3- 7

3.4.4 Upper Registration Roller ........................................................................................................................3- 7

3.4.4.1 Removing the Front Cover ..............................................................................................................3- 7

3.4.4.2 Removing the Feeder Cover ...........................................................................................................3- 7

3.4.4.3 Removing the Upper Registration Roller.......................................................................................3- 7

3.4.5 Lower Registration Roller ........................................................................................................................3- 8

3.4.5.1 Removing the Front Cover ..............................................................................................................3- 8

3.4.5.2 Removing the Feeder Cover ...........................................................................................................3- 8

3.4.5.3 Removing the Rear Cover ...............................................................................................................3- 8

3.4.5.4 Removing the ADF Driver PCB ......................................................................................................3- 8

Contents

3.4.5.5 Removing the Feed Motor............................................................................................................... 3- 8

3.4.5.6 Removing the Timing Belt ............................................................................................................... 3- 9

3.4.5.7 Removing the Document Tray........................................................................................................ 3- 9

3.4.5.8 Removing the Feeding Unit............................................................................................................. 3- 9

3.4.5.9 Removing the Platen Roller Unit .................................................................................................... 3- 9

3.4.5.10 Removing the Read Roller 2....................................................................................................... 3- 10

3.4.5.11 Removing the Sensor Unit in the Feeder Unit ......................................................................... 3- 10

3.4.5.12 Removing the Lower Registration Roller .................................................................................. 3- 10

3.4.6 Delivery Reversing Roller (upper) ....................................................................................................... 3- 11

3.4.6.1 Removing the Front Cover ............................................................................................................ 3- 11

3.4.6.2 Removing the Feeder Cover......................................................................................................... 3- 11

3.4.6.3 Removing the Rear Cover............................................................................................................. 3- 11

3.4.6.4 Removing the ADF Driver PCB .................................................................................................... 3- 11

3.4.6.5 Removing the Pickup Motor .......................................................................................................... 3- 11

3.4.6.6 Removing the Feed Motor............................................................................................................. 3- 12

3.4.6.7 Removing the Timing Belt ............................................................................................................. 3- 12

3.4.6.8 Removing the Document Tray...................................................................................................... 3- 12

3.4.6.9 Removing the Feeding Unit........................................................................................................... 3- 13

3.4.6.10 Removing the Upper Delivery Reversing Roller ...................................................................... 3- 13

3.4.7 Read Roller 1 .......................................................................................................................................... 3- 13

3.4.7.1 Removing the Front Cover ............................................................................................................ 3- 13

3.4.7.2 Removing the Feeder Cover......................................................................................................... 3- 13

3.4.7.3 Removing the Rear Cover............................................................................................................. 3- 14

3.4.7.4 Removing the ADF Driver PCB .................................................................................................... 3- 14

3.4.7.5 Removing the Pickup Motor .......................................................................................................... 3- 14

3.4.7.6 Removing the Feed Motor............................................................................................................. 3- 14

3.4.7.7 Removing the Timing Belt ............................................................................................................. 3- 14

3.4.7.8 Removing the Document Tray...................................................................................................... 3- 15

3.4.7.9 Removing the Feeding Unit........................................................................................................... 3- 15

3.4.7.10 Removing the Read Roller 1....................................................................................................... 3- 15

3.4.8 Read Roller 2 .......................................................................................................................................... 3- 16

3.4.8.1 Removing the Front Cover ............................................................................................................ 3- 16

3.4.8.2 Removing the Feeder Cover......................................................................................................... 3- 16

3.4.8.3 Removing the Rear Cover............................................................................................................. 3- 16

3.4.8.4 Removing the ADF Driver PCB .................................................................................................... 3- 16

3.4.8.5 Removing the Pickup Motor .......................................................................................................... 3- 16

3.4.8.6 Removing the Feed Motor............................................................................................................. 3- 17

3.4.8.7 Removing the Timing Belt ............................................................................................................. 3- 17

3.4.8.8 Removing the Document Tray...................................................................................................... 3- 17

3.4.8.9 Removing the Feeding Unit........................................................................................................... 3- 18

3.4.8.10 Removing the Read Roller 2....................................................................................................... 3- 18

3.4.9 Platen Roller............................................................................................................................................ 3- 18

3.4.9.1 Removing the Front Cover ............................................................................................................ 3- 18

3.4.9.2 Removing the Feeder Cover......................................................................................................... 3- 19

3.4.9.3 Removing the Rear Cover............................................................................................................. 3- 19

3.4.9.4 Removing the ADF Driver PCB .................................................................................................... 3- 19

3.4.9.5 Removing the Pickup Motor .......................................................................................................... 3- 19

3.4.9.6 Removing the Feed Motor............................................................................................................. 3- 19

3.4.9.7 Removing the Timing Belt ............................................................................................................. 3- 19

Contents

3.4.9.8 Removing the Document Tray ......................................................................................................3- 20

3.4.9.9 Removing the Feeding Unit...........................................................................................................3- 20

3.4.9.10 Removing the Platen Roller.........................................................................................................3- 20

3.4.10 Delivery Reversing Roller (lower) ......................................................................................................3- 21

3.4.10.1 Removing the Front Cover ..........................................................................................................3- 21

3.4.10.2 Removing the Feeder Cover .......................................................................................................3- 21

3.4.10.3 Removing the Rear Cover ...........................................................................................................3- 21

3.4.10.4 Removing the ADF Driver PCB ..................................................................................................3- 21

3.4.10.5 Removing the Pickup Motor ........................................................................................................3- 22

3.4.10.6 Removing the Feed Motor ...........................................................................................................3- 22

3.4.10.7 Removing the Timing Belt............................................................................................................3- 22

3.4.10.8 Removing the Document Tray ....................................................................................................3- 23

3.4.10.9 Removing the Feeding Unit.........................................................................................................3- 23

3.4.10.10 Removing the Lower Delivery Reversing Roller ....................................................................3- 23

3.4.11 Feeding Unit ..........................................................................................................................................3- 23

3.4.11.1 Removing the Front Cover ..........................................................................................................3- 23

3.4.11.2 Removing the Feeder Cover .......................................................................................................3- 23

3.4.11.3 Removing the Rear Cover ...........................................................................................................3- 23

3.4.11.4 Removing the ADF Driver PCB ..................................................................................................3- 24

3.4.11.5 Removing the Pickup Motor ........................................................................................................3- 24

3.4.11.6 Removing the Feed Motor ...........................................................................................................3- 24

3.4.11.7 Removing the Timing Belt............................................................................................................3- 24

3.4.11.8 Removing the Document Tray ....................................................................................................3- 25

3.4.11.9 Removing the Feeding Unit ........................................................................................................3- 25

3.4.12 Document Tray......................................................................................................................................3- 25

3.4.12.1 Removing the Front Cover ..........................................................................................................3- 25

3.4.12.2 Removing the Rear Cover ...........................................................................................................3- 26

3.4.12.3 Removing the Document Tray ....................................................................................................3- 26

3.5 Electrical System...........................................................................................................................................3- 26

3.5.1 Inner Sensor of Feed Unit .....................................................................................................................3- 26

3.5.1.1 Removing the Front Cover ............................................................................................................3- 26

3.5.1.2 Removing the Feeder Cover .........................................................................................................3- 26

3.5.1.3 Removing the Rear Cover .............................................................................................................3- 27

3.5.1.4 Removing the ADF Driver PCB ....................................................................................................3- 27

3.5.1.5 Removing the Pickup Motor ..........................................................................................................3- 27

3.5.1.6 Removing the Feed Motor .............................................................................................................3- 27

3.5.1.7 Removing the Timing Belt..............................................................................................................3- 27

3.5.1.8 Removing the Document Tray ......................................................................................................3- 28

3.5.1.9 Removing the Feeding Unit...........................................................................................................3- 28

3.5.1.10 Removing the Platen Roller Unit ................................................................................................3- 28

3.5.1.11 Removing the Read Roller 2 .......................................................................................................3- 29

3.5.1.12 Removing the Sensor in the Feeder Unit..................................................................................3- 29

3.5.2 Document Width Volume.......................................................................................................................3- 29

3.5.2.1 Removing the Relay PCB (Document Width Sensor PCB)......................................................3- 29

3.5.3 Cover Open/Closed Sensor ..................................................................................................................3- 30

3.5.3.1 Removing the Rear Cover .............................................................................................................3- 30

3.5.3.2 Removing the Feeder Cover Open/Close Sensor.....................................................................3- 30

3.5.4 Document Set Sensor............................................................................................................................3- 30

3.5.4.1 Removing the Rear Cover .............................................................................................................3- 30

Contents

3.5.4.2 Removing the Document Placement Sensor ............................................................................ 3- 30

3.5.5 Document Length sensor...................................................................................................................... 3- 30

3.5.5.1 Removing the Document Length Sensor.................................................................................... 3- 30

3.5.6 Pressurization Solenoid......................................................................................................................... 3- 31

3.5.6.1 Removing the Rear Cover............................................................................................................. 3- 31

3.5.6.2 Removing the Pressurization Solenoid (Roller Release Solenoid)......................................... 3- 31

3.5.7 ADF Driver PCB ..................................................................................................................................... 3- 31

3.5.7.1 Removing the Rear Cover............................................................................................................. 3- 31

3.5.7.2 Removing the ADF Driver PCB .................................................................................................... 3- 31

Chapter 4 Maintenance

4.1 User Maintenance........................................................................................................................................... 4- 1

4.1.1 Cleaning .................................................................................................................................................... 4- 1

4.1.2 Replacement ............................................................................................................................................ 4- 1

4.2 Maintenance and Inspection......................................................................................................................... 4- 2

4.2.1 Periodically Replaced Parts.................................................................................................................... 4- 2

4.2.1.1 Periodically Replaced Parts ............................................................................................................ 4- 2

4.2.2 Durables..................................................................................................................................................... 4- 2

4.2.2.1 Durables ............................................................................................................................................. 4- 2

4.2.3 Periodical Servicing ................................................................................................................................. 4- 2

4.2.3.1 Periodic Service Items ..................................................................................................................... 4- 2

4.3 Adjustment ....................................................................................................................................................... 4- 2

4.3.1 Basic Adjustment...................................................................................................................................... 4- 2

4.3.1.1 Outline ................................................................................................................................................ 4- 2

4.3.1.2 Height Adjustment ............................................................................................................................ 4- 2

4.3.1.3 Perpendicularity Adjustment ........................................................................................................... 4- 3

4.3.1.4 Magnification Adjustment ................................................................................................................ 4- 4

4.3.1.5 Side Registration Adjustment ......................................................................................................... 4- 4

4.3.1.6 Leading Edge Registration Adjustment......................................................................................... 4- 4

4.3.1.7 Reading Position Adjustment.......................................................................................................... 4- 4

4.4 Outline of Electrical Components................................................................................................................. 4- 5

4.4.1 Electric Parts Layout/Functions............................................................................................................. 4- 5

4.5 Variable Resistors (VR), Light-Emitting Diodes (LED), and Check Pins by PCB................................. 4- 6

4.5.1 Outline ....................................................................................................................................................... 4- 6

4.5.2 ADF Driver PCB....................................................................................................................................... 4- 6

4.5.3 Relay PCB ............................................................................................................................................... 4- 6

Chapter 5 Error Code

5.1 Service Error Code......................................................................................................................................... 5- 1

5.1.1 Error Code List ......................................................................................................................................... 5- 1

5.2 Jam Codes....................................................................................................................................................... 5- 1

5.2.1 Jam Code List .......................................................................................................................................... 5- 1

Chapter 1 Specifications

Contents

1.1 Product Specifications........................................................................................................................................ 1-1

1.1.1 Specifications .............................................................................................................................................. 1-1

1.2 Names of Parts.................................................................................................................................................... 1-2

1.2.1 External View.............................................................................................................................................. 1-2

1.2.2 Cross-section ............................................................................................................................................... 1-2

1.1 Product Specifications

Chapter 1

1.1.1 Specifications

T-1-1

Item Specification Remarks

Document pickup method Automatic pickup and delivery

Document loading direction Face-up

Document loading position Aligned to center

Document separation method Upper separation

Continuous feed: 52-105 g/m2 or less Document longer than

Document weight

Document size

Document tray capacity

Document read method Stream reading

Document processing mode - Single-sided document processing

Document size recognition Detected by photo interrupter on pickup tray Longitudinal: Two

Jam recovery function Not supported

Completion stamp function Supported

Mixed document function

Book document Ready (The thickness of the book document must not

Document feed speed 100% read: 118 mm/s Speed range: 26.22 to

Document processing speed (A4, LTR)

Power supply Power system: 24 VDC ±5%

Weight Approx. 7.0 kg

Dimensions 565 (W) x 489.4 (D) x 122 (H) mm

Operating environment

Temperature range

Humidity range Same as that of host machine.

Single feed: Less than 37-52 g/m2, 105-128 g/m2 or less

AB type: B6/A5/A5R/B5R/A4/A4R/B4/A3 SMT, B6: Landscape

Inch type: STMT/LTR/LTRR/LGN/11 x 17

Document width: 148-297 mm

Document length (longitudinal) 128-432 <<1000>> mm

S-size: 50 sheets (S-size: A4, A4R, B5, B5R, A5, A5R, B6, LTR, LTRR, STMT)

L-size: 25 sheets (L-size: A3, 11 x 17, B4, LGL)

Document heavier than 80 g/m2: Weight equivalent

Folded document: 10 mm or less in height

- Double-sided document processing

Same types of paper can be mixed. Mixing of same type of

Different types of paper can be mixed.

Examples of mixing of different types of paper

AB type: A3/B4, A4/B5, B4/A4R, B5/A5

exceed 50 mm.)

Single-sided: 20 ipm Document processing

Logic system: 13 VDC ±3%

Same as that of host machine.

432 mm: 60-90 g/m2 (single-sided, single feed)

orientation only

The document with the length indicated in << >> must be held by the operator.

(80 g/m2 paper)

photo interrupters Lateral: Two photo interrupters

paper: 52-105 g/m2 or less (equivalent to that in continuous feed mode) Mixing of different types of paper: 64-81.4 g/m2

236 mm/s

speed can be varied.

Supplied from host machine

0010-3980

1-1

Chapter 1

1.2 Names of Parts

1.2.1 External View

1.2.2 Cross-section

[3]

[2]

[1]

[5]

F-1-1

T-1-2

[1] Feeder cover [4] Document pickup tray

[2] Rear cover [5] Front cover

[3] Slide guide [6] Document delivery tray

0010-3981

[4]

[6]

0010-3982

[1] Lower registration roller [2] Upper registration roller [3] Separation roller [4] Separation pad [5] Pickup roller [6] Document supply tray [7] Upper delivery reversal roller [8] Lower delivery reversal roller [9] Read roller 2 (lower) [10] Read roller 2 (upper) [11] Platen roller [12] Read roller [13] Read roller 1 (upper) [14] Read roller 1 (lower) [15] White sheet

[12]

[15]

[1] [2] [3] [4] [5]

[9]

[10][11][13][14]

[8]

F-1-2

[6]

[7]

1-2

Chapter 2 Functions

Contents

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

2.1.1 Outline of Electric Circuit ........................................................................................................................... 2-1

2.2 Basic Operation .................................................................................................................................................. 2-1

2.2.1 Drive Mechanism and Signals..................................................................................................................... 2-1

2.2.2 Outline of Operation Mode ......................................................................................................................... 2-2

2.2.3 Forward Pickup/Delivery (Single-sided document > Simplex Printing) Operation ................................... 2-2

2.2.4 Forward Pickup/Reversal Delivery (Double-sided document > Duplex printing) Operation..................... 2-2

2.3 Document Detection........................................................................................................................................... 2-4

2.3.1 Outline ......................................................................................................................................................... 2-4

2.3.2 Document Presence/Absence Detection...................................................................................................... 2-4

2.3.3 Detection of Last Document........................................................................................................................ 2-4

2.3.4 Initial Document Size Detection ................................................................................................................. 2-5

2.4 Document Pickup/Separation ............................................................................................................................. 2-6

2.4.1 Basic Pickup Operation ............................................................................................................................... 2-6

2.4.2 Pickup Unit and Stopper.............................................................................................................................. 2-7

2.4.3 Pickup Timing ............................................................................................................................................. 2-7

2.4.4 Pickup Motor (M2) Control ........................................................................................................................ 2-7

2.5 Document Reversing .......................................................................................................................................... 2-8

2.5.1 Basic Operation ........................................................................................................................................... 2-8

2.5.2 Operation Sequence..................................................................................................................................... 2-9

2.6 Document Feeding/Delivery .............................................................................................................................. 2-9

2.6.1 Basic Operation ........................................................................................................................................... 2-9

2.6.2 Operation Sequence................................................................................................................................... 2-10

2.6.3 Feed Motor (M1) Control.......................................................................................................................... 2-10

2.7 Detecting Jams ................................................................................................................................................. 2-10

2.7.1 Jam............................................................................................................................................................. 2-10

2.8 Power Supply ................................................................................................................................................... 2-11

2.8.1 Power Supply ............................................................................................................................................ 2-11

2.9 Stamp Operation............................................................................................................................................... 2-11

2.9.1 Outline ....................................................................................................................................................... 2-11

2.1 Basic Construction

Chapter 2

2.1.1 Outline of Electric Circuit

Electric circuits of this machine are controlled by the reader controller PCB and image processor PCB. The ASICs on the reader controller PCB and image processor PCB detect the signals received from the host machine to output the signals that drive DC loads such as motors and solenoids at the predetermined timings. The reader controller PCB and image processor PCB do not have a memory area; data (service mode, etc.) is stored in the image processor PCB.

0010-3889

Motor

J403

Sensor

Solenoid

J308

+24V

ADF driver PCB

CN10

J410

CN1

J412

CN2

+3.3V

J411

Image

J309

processor

PCB

ASIC(IC2)

J404

Reader controller PCB

F-2-1

2.2 Basic Operation

2.2.1 Drive Mechanism and Signals

This machine is a document feeder exclusively for stream reading. This machine uses two motors to pick up and feed document paper.

Name (symbol) Function

Feed motor (M1) Feeds documents.

Pickup motor (M2) Separates and feeds documents.

The drive mechanism and signals are shown below.

PI8

PI7

PI6

PI11

T-2-1

PI3

PI2

PI1

PI4

0010-3892

PI5

F-2-2

2-1

Chapter 2

[1] ADF driver PCB [2] Document detection signal [3] Document detection signal [4] Pickup motor drive signal [5] Document placement signal [6] Stamp solenoid drive signal [7] Document placement signal [8] Feed motor drive signal [9] Roller release solenoid drive signal [10] Last document detection signal [11] Paper size (width) identification signal 1 [12] Paper size (width) identification signal 2 [13] Paper size (length) identification signal 1 [14] Paper size (length) identification signal 2 [15] Relay PCB

2.2.2 Outline of Operation Mode

This machine has four operation modes. This machine operates in the operation mode specified by the host machine to perform printing. Operation mode names, brief outline of operations, and associated print modes are given in the following table:

Operation mode name Outline of operation Associated print mode

[1] Forward pickup/delivery Picks up, reads, and then delivers an document. Single-sided document >

[2] Forward feed/reversal delivery

Picks up, reads, reverses, and delivers an document.

T-2-2

Simplex printing Single-sided document > Duplex printing (This operation is performed for documents with the same width/different width.)

Double-sided document > Duplex printing Double-sided document > Simplex printing (This operation is performed for documents with the same width/different width.)

2.2.3 Forward Pickup/Delivery (Single-sided document > Simplex Printing) Operation

The document flows as shown below.

0010-3893

0010-3894

MEMO:

This operation is performed for all single-sided documents irrespective of whether document widths are the same or different.

Document

Pickup

Formation of loop

Waiting for reading

Delivery

End of job

Reading

F-2-3

2.2.4 Forward Pickup/Reversal Delivery (Double-sided document > Duplex printing) Operation

The document flow is shown below.

MEMO:

2-2

0010-3895

This operation is performed for all double-sided documents irrespective of whether document widths are the same or different.

Document

Chapter 2

Pickup

Formation of loop

Waiting for reading

Reading

Feed

Reversal

Formation of loop

Waiting for reading

to next page

F-2-4

Reverse side reading

Feed

Reversal

Feed

Idle feed

Delivery

End of job

F-2-5

2-3

Chapter 2

2.3 Document Detection

2.3.1 Outline

This machine detects an document using either one of the two methods depending on the print mode.

- Normal print mode (other than mixed size print mode and banner paper mode)

- Mixed size print mode and banner paper mode

a. Normal print mode (other than mixed size print mode and banner paper mode) In the normal print mode, the following four document detection functions are used:

Function Description Sensor used (symbol)

Document presence/ absence detection

Last document detection Detects whether the document being picked up is

Initial document size detection

- Longitudinal direction Detects the length of the document placed on the

- Lateral direction Detects the width of the document placed on the

b. Mixed size print mode and banner paper mode In the mixed size print mode and banner paper mode, the following three document detection functions are used:

Function Description Sensor used (symbol)

Document presence/ absence detection

Last document detection Detects whether the document being

Document length detection Detects the document length

Detects whether there is an document on the document pickup tray.

the last one.

document pickup tray.

Detects whether there is a document on the document pickup tray.

picked up is the last one.

according to the distance from the position where the read sensor (PI7) turns on to the position where the read sensor (I7) turns off.

T-2-3

T-2-4

Document set sensor (PI11)

Last document detection sensor (PI3)

Document length sensor 1/2 (PI4/ PI5)

Document width sensor 1/2 (PI2/ PI1)

Document set sensor (PI11)

Last document detection sensor (PI3)

Read sensor (PI7)

2.3.2 Document Presence/Absence Detection

The Document set sensor (PI11) detects presence/absence of a document on the document tray. When a document is placed on the document tray, the detection lever moves the light shielding plate to allow light to pass thorough the photo interrupter. Thus, the Document set sensor (PI11) generates an document detection signal (EMPTY) to notify the host machine that an document is placed on the document tray via the ADF drive PCB.

0010-3898

0010-3899

ADF driver PCB

Detection lever

Document

EMPTY

PI11

F-2-6

2.3.3 Detection of Last Document

The last document detection sensor (PI3) and Document set sensor (PI11) detect whether the document being picked up is the last one. When the trailing edge of the last document has moved past the last document detection lever, the detection lever moves the light shielding plate to allow light pass through the photo interrupter. Thus, the last document detection sensor (PI3) generates a last document detection signal (LAST). When the last document has moved past the document sensor (PI11), an document absence signal (EMPTY) is generated to notify the host machine that an document being picked up is the last one

0010-3900

via the ADF drive PCB.

2-4

Document

PI11

ADF driver PCB

Detection lever

EMPTY

PI3

Chapter 2

LAST

F-2-7

2.3.4 Initial Document Size Detection

The document length sensor 1 (PI4) and document length detection sensor 2 (PI5) detect the longitudinal size of the document placed on the document tray, and the document width sensor 1 (PI2) and document width sensor 2 (PI1) detect the lateral size of the document. When an document is placed on the document tray, detection levers of the two document length sensors move the light shielding plate to allow light pass through the photo interrupter. If the slide guide is adjusted to the document size, the two document width sensors mounted inside the document tray are shielded by the light shielding plate mounted at the bottom of the slide guide. Document sizes are determined by the combination of the ON/OFF states of document length sensors and the combination of ON/OFF states of document width

0010-3901

sensors.

PI5

PI4

PI2

PI1

F-2-8

The following tables show the relationships among document width sensors, document length sensors, and document sizes.

1. AB type

T-2-5

Sensor name

Size

Document width

sensor 1

A3 ON ON ON ON

B4 OFF ON ON ON

A4R OFF OFF ON OFF

B5R ON OFF ON OFF

A4 ON ON OFF OFF

A5R ON OFF OFF OFF

B5 OFF ON OFF OFF

A5 OFF OFF OFF OFF

B6 ON OFF OFF OFF

Document width

sensor 2

Document length

sensor 1

Document length

sensor 2

2. Inch type

2-5

+ 63 hidden pages