Canon DADF-A1 Service Manual

COPYRIGHT 1998 CANON INC. CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)

REVSION 0

DEC. 1998 FY8-13FW-000

DADF-A1

COPYRIGHT 1998 CANON INC. CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)

IMPORTANT

THIS DOCUMENTATION IS PUBLISHED BY CANON INC., JAPAN, TO SERVE AS A SOURCEOF REFERENCE FOR WORK IN THE FIELD.SPECIFICATIONS AND OTHER INFORMATION CONTAINED HEREIN MAY VARY SLIGHTLYFROM ACTUAL MACHINE VALUES OR THOSE FOUND IN ADVERTISING AND OTHERPRINTED MATTER.

ANY QUESTIONS REGARDING INFORMATION CONTAINED HEREIN SHOULD BE DIRECTEDTO THE COPIER SERVICE DEPARTMENT OF THE SALES COMPANY.THIS DOCUMENTATION IS INTENDED FOR ALL SALES AREAS, AND MAY CONTAIN INFOR-MATION NOT APPLICABLE TO CERTAIN AREAS.

COPYRIGHT 1998 CANON INC.

Printed in JapanImprim au Japon

Use of this manual should be strictly su-pervised to avoid disclosure of confidentialinformation.

Prepared by

OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DEPARTMENT 1OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DIVISION

CANON INC.

5-1, Hakusan, 7-chome, Toride-City, Ibaraki-Pref., 302-8501, Japan

COPYRIGHT 1998 CANON INC. CANON DADF-A1 REV. 0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) i

INTRODUCTION

This Service Manual provides information needed to service the DADF in the field. This ServiceManual consists of the following chapters:

Chapter 1 General Description introduces the DADFs features and specifications, andshows how to operate it.

Chapter 2 Basic Operation introduces the ADAFs mechanical and electrical systems; it alsoexplains the principles used in these systems and the timing at which they areoperated with reference to the ADAFs electrical circuitry.

Chapter 3 Mechanical System explains the ADAFs mechanical construction and how itsparts may be disassembled/assembled and adjusted.

Chapter 4 Maintenance and Servicing provides tables of periodically replaced parts andconsumables/durables and scheduled servicing charts.

Chapter 5 Troubleshooting provides tables of maintenance/inspection, standards/adjustments, and problem identification (image fault/malfunction).

Appendix contains a general timing chart and general circuit diagrams.

The descriptions in this Service Manual are subject to change without notice for productimprovement or other purposes, and major changes will be communicated in the form of ServiceInformation bulletins.

All service persons are expected to have a good understanding of the contents of this ServiceManual and all relevant Service Information bulletins, and be able to identify and isolate faults in themachine.

COPYRIGHT 1998 CANON INC. CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) i i i

CONTENTS

CHAPTER 1 GENERAL DESCRIPTION

I. FEATURES .................................1-1II. SPECIFICATIONS ......................1-2

A. DADF-A1................................1-2III. NAMES OF PARTS ....................1-4

A. External View .........................1-4B. Cross Section.........................1-4

IV. OPERATION ...............................1-5A. Original Set Indicator .............1-5B. Warning and Actions ..............1-5C. Routine Maintenance by the

User........................................1-6

CHAPTER 2 BASIC OPERATION

I. BASIC CONSTRUCTION ...........2-1A. Outline of the Electrical Circuitry .

...............................................2-1B. Communication with the Copier

...............................................2-2C. Inputs to the DADF Controller

PCB........................................2-3D. Outputs to the DADF Controller

PCB........................................2-5II. BASIC OPERATION ...................2-6

A. Outline ....................................2-6B. Operation ...............................2-7C. Detecting Originals ..............2-12D. Picking Up Originals ............2-17

E. Reversal ...............................2-25F. Reduced Page Composition

.............................................2-27G. Delivery ................................2-34H. Stamping Function ...............2-40I. Controlling the Pick-Up Motor

.............................................2-43J. Controlling the Belt Motor

.............................................2-45K. Detecting Original Jams

.............................................2-47L. Improper Placement of

Originals ...............................2-50III. POWRE SUPPLY .....................2-53

A. Outline ..................................2-53

COPYRIGHT 1998 CANON INC. CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)i v

CHAPTER 3 MECHANICAL SYSTEM

CHAPTER 4 MAINTENANCE AND SERVICING

I. BASIC CONSTRUCITON ...........3-1A. External Covers .....................3-1B. Switches.................................3-3C. Adjusting the DADF Height

...............................................3-5II. DRIVE SYSTEM .........................3-6

A. Removing the Pick-UpMotor Unit ...............................3-6

B. Removing the Feeder Motor Unit...............................................3-6

C. Belt Motor ...............................3-7D. Removing the Clutch Unit

...............................................3-9E. Delivery Motor ......................3-10

III. FEEDING SYSTEM ..................3-11A. Pick-Up Roller ......................3-11B. Removing the Separation

Belt Unit ...............................3-12C. Feeding Roller Unit ..............3-12D. Registration Roller ...............3-14E. Delivery/Resersing Roller

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

F. Delivery Roller Unit(bottom Pick-up Mode) .........3-20

G. Delviery Roller Unit(top Pick-up Mode) ...............3-20

H. Reversing Guide ..................3-22I. Stopper Plate Solenoid ........3-24J. Positioning the Paper Retaining

Plate Solenoid (SL2) ............3-24K. Positioning the Paper Deflecting

Solenoid (SL3) .....................3-26L. Stamp Solenoid ...................3-26M. Feeding Belt .........................3-28

IV. CLEANING................................3-30A. Belt Assembly ......................3-30B. Sensors ................................3-30C. Separation Flapper ..............3-33D. Separation Guide .................3-33

V. FEEDING ..................................3-34A. Pick-Up Drive Assembly ......3-34B. Right Delivery Drive

Assembly .............................3-34

I. PERIODICALLY REPLACEDPARTS ........................................4-1

II. CONSUMABLES ANDDURABLES ................................4-1

III. SCHEDULED SERVICINGCHART........................................4-2

COPYRIGHT 1998 CANON INC. CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) v

CHAPTER 5 TROUBLESHOOTING

APPENDIX

I. STANDARDS ANDADJUSTMENTS .........................5-1A. Mechanical System ................5-1B. Electrical System .................5-17

II. TROUBLESHOOTING ..............5-20A. Troubleshooting

Malfunctions .........................5-20III. ARRAIGMENT OF THE ELECTRI-

CAL PARTS ..............................5-24A. Motors, Solenoids, and

Sensors ................................5-24

B. PCB......................................5-26IV. VARIABLE RESISTORS, LIGHT-

EMITTING DIODES, AND CHECKPINS BY PCB ...........................5-27A. DADF Controller PCB ..........5-27B. Indicator PCB .......................5-29C. DIP Switch Functions...........5-30

V. SELF DIAGNOSIS ....................5-32A. DADF Self Diagnosis ...........5-32

A. GENERAL TIMING CHART....... A-1B. NAMES AND ABBREVIATIONS OF

SIGNALS.................................... A-4C. DADF-A1 GENERAL CIRCUIT

DIAGRAM .................................. A-5

D. DADF CONTROLLER CIRCUITDIAGRAM .................................. A-6

E. DISPLAY BOARD .................... A-13F. SPECIAL TOOLS ..................... A-14G. SOLVENTS AND OILS ............ A-15

COPYRIGHT 1998 CANON INC. CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 1GENERAL DESCRIPTION

I. FEATURES ..................................1-1II. SPECIFICATIONS .......................1-2 A. DADF-A1 ....................................1-2

III. NAMES OF PARTS .....................1-4A. External View .............................1-4B. Cross Section .............................1-4

IV. OPERATION ................................1-5A. Original Set Indicator ..................1-5B. Warnings and Actions ................1-5C. Routine Maintenance

by the User .................................1-6

COPYRIGHT 1998 CANON INC. CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON) 1-1

CHAPTER 1 GENERAL DESCRIPITON

I. FEATURES1. Two Types of Pick-Up Mode

Top pick-up: Pick-up starts with the top page.Bottom pick-up: Pick-up starts with the bottom page.

2. Stamp MarkingThe machine can mark originals with a stamp to indicate that they have been processed for fax

transmission.

3. Original Size IdentificationThe machine can identify the size of an original in terms of its length (feeding direction) and

width for communication to its host copier.

CHAPTER 1 GENERAL DESCRIPITON

1-2 COPYRIGHT 1998 CANON INC. CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)

ItemOriginal pick-upOriginal placement 1Original placement 2

Original pick-up

Original type

Original size

Original tray

Delivery tray

Original proces