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
CLICK HERE FOR PARTS CATALOGUE
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 SOURCE
OF REFERENCE FOR WORK IN THE FIELD.
SPECIFICATIONS AND OTHER INFORMATION CONTAINED HEREIN MAY VARY SLIGHTLY
FROM ACTUAL MACHINE VALUES OR THOSE FOUND IN ADVERTISING AND OTHER
PRINTED MATTER.
ANY QUESTIONS REGARDING INFORMATION CONTAINED HEREIN SHOULD BE DIRECTED
TO 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 Japan
Imprimé au Japon
Use of this manual should be strictly su-
pervised to avoid disclosure of confidential
information.
Prepared by
OFFICE IMAGING PRODUCTS TECHNICAL SUPPORT DEPARTMENT 1
OFFICE 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 Service
Manual consists of the following chapters:
Chapter 1
"General Description" introduces the DADF's features and specifications, and
shows how to operate it.
Chapter 2
"Basic Operation" introduces the ADAF's mechanical and electrical systems; it also
explains the principles used in these systems and the timing at which they are
operated with reference to the ADAF's electrical circuitry.
Chapter 3
"Mechanical System" explains the ADAF's mechanical construction and how its
parts may be disassembled/assembled and adjusted.
Chapter 4
"Maintenance and Servicing" provides tables of periodically replaced parts and
consumables/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 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.
COPYRIGHT © 1998 CANON INC.
CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
iii
CONTENTS
CHAPTER 1 GENERAL DESCRIPTION
I.
FEATURES .................................1-1
II.
SPECIFICATIONS ...................... 1-2
A. DADF-A1 ................................ 1-2
III.
NAMES OF PARTS .................... 1-4
A. External View ......................... 1-4
B. Cross Section ......................... 1-4
IV.
OPERATION ............................... 1-5
A. Original Set Indicator ............. 1-5
B. Warning and Actions .............. 1-5
C. Routine Maintenance by the
User ........................................ 1-6
CHAPTER 2 BASIC OPERATION
I.
BASIC CONSTRUCTION ...........2-1
A. Outline of the Electrical Circuitry .
............................................... 2-1
B. Communication with the Copier
............................................... 2-2
C. Inputs to the DADF Controller
PCB ........................................ 2-3
D. Outputs to the DADF Controller
PCB ........................................ 2-5
II.
BASIC OPERATION ................... 2-6
A. Outline .................................... 2-6
B. Operation ............................... 2-7
C. Detecting Originals ..............2-12
D. Picking Up Originals ............2-17
E. Reversal ...............................2-25
F. Reduced Page Composition
.............................................2-27
G. Delivery ................................2-34
H. Stamping Function ...............2-40
I. Controlling the Pick-Up Motor
.............................................2-43
J. Controlling the Belt Motor
.............................................2-45
K. Detecting Original Jams
.............................................2-47
L. Improper Placement of
Originals ...............................2-50
III.
POWRE SUPPLY .....................2-53
A. Outline ..................................2-53