Canon DADF-H1 User manual

DADF-H1
REVISION 0
MAR.2001
COPYRIGHT © 2001 CANON INC.2001CANONDADF-H1 REV.0 MAR. 2001 PRINTED IN U.S.A.
FY8-13HA-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.
Copyright
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.
COPYRIGHT © 2001 CANON INC.20CANON DADF-H1 REV. 0 MAR. 2001 PRINTED IN U.S.A.
Caution
Use of this manual should be strictly supervised to avoid disclosure of confidential information.
COPYRIGHT © 2001 CANON INC.
Printed in U.S.A.
Imprimé au U.S.A.

COPYRIGHT © 2001 CANON INC.2001 2001 2001 2001 CANON DADF-H1 REV.0 MAR.2001
i
INTRODUCTION
1 Symbols Used
This documentation uses the following symbols to indicate special information:
Symbol Description
Indicates an item requiring care to avoid combustion (fire).
Indicates an item prohibiting disassembly to avoid electric shocks or problems.
Indicates an item requiring disconnection of the power plug from the electric
outlet.
Indicates an item intended to provide notes assisting the understanding of the
topic in question.
Memo
Indicates an item of reference assisting the understanding of the topic in ques-
tion.
REF.
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.
Indicates an item of a non-specific nature, possibly classified as Note, Caution,
or Warning.
Indicates an item requiring care to avoid electric shocks.

COPYRIGHT © 2001 CANON INC. 2001 2001 2001 2001 CANON DADF-H1 REV.0 MAR. 2001
ii
INTRODUCTION
2 Outline of the Manual
This Service Manual contains basic facts and figures needed to service the DADF-H1 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 op-
eration; construction and outline of electrical cir-
cuitry
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.

COPYRIGHT © 2001 CANON INC.2001 2001 2001 2001 CANON DADF-H1 REV.0 MAR.2001
iii
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, how-
ever, 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 ad-
dition, 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 service 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).

COPYRIGHT © 2001 CANON INC. 2001 2001 2001 2001 CANON DADF-H1 REV.0 MAR. 2001
iv
CONTENTS
Contents
CHAPTER 1 GENERAL DESCRIPTION
1 Basic Configuration ............................ 2-1
1.1 Electrical Circuit Schematics .... 2-1
1.2 ADF Controller Circuit Board
Input ........................................... 2-2
1.3 ADF Controller Circuit Board
Output ........................................ 2-3
2 Basic Operations ................................. 2-4
2.1 Overview .................................... 2-4
2.2 Operations .................................. 2-6
2.2.1 Overview.............................. 2-6
2.2.2 Forwarding pickup/delivery
(Single-sided document ->
Single-sided print) ............... 2-7
2.2.3 Forwarding pickup/reversal
delivery
(Double-sided document ->
Double-sided print).............. 2-8
2.2.4 Idle feed/reversal pickup/
reversal delivery (Double-sided
documents of different sizes ad-
hering to different systems ->
Double-sided print)............ 2-10
2.2.5 Idle feed/reversal pickup/deliv-
ery (Single-sided documents of
different sizes adhering to dif-
ferent systems -> Single-sided
print) .................................. 2-13
2.3 Document Set Detection .......... 2-15
2.3.1 Overview............................ 2-15
2.3.2 Detecting the presence or
absence of a document in the
document pickup tray ........ 2-17
2.3.3 Detecting whether the document
being fed is the last document
or not.................................. 2-18
2.3.4 Initial document size detection
(feed direction) .................. 2-19
2.3.5 Initial document size detection
(width direction) ................ 2-20
2.3.6 Final document size
detection ............................ 2-23
2.4 Document Pickup/Separation .. 2-26
2.4.1 Basic pickup operation ...... 2-26
2.4.2 Pickup station and stopper. 2-28
2.4.3 Pickup timing chart ........... 2-29
2.4.4 Pickup motor (M2)control. 2-30
2.5 Reversing ................................. 2-31
2.5.1 Operation ........................... 2-31
2.5.2 Operating sequences .......... 2-32
2.6 Document Feed/Delivery ......... 2-33
2.6.1 Operation ........................... 2-33
2.6.2 Operating sequence ........... 2-34
2.6.3 Feed motor (M1) control ... 2-35
3 Jams .................................................. 2-36
4 Power Supply.................................... 2-39
1 Features ............................................... 1-1
2 Specifications...................................... 1-2
2.1 Specifications ............................. 1-2
3 Names of Parts .................................... 1-4
3.1 Exterior View ............................. 1-4
3.2 Cross-Sectional View ................. 1-5
CHAPTER 2 OUTLINE OF OPERATION
4 Operation Descriptions ....................... 1-6
4.1 Document Set LED .................... 1-6
4.2 Alarm Indications and Corrective
Action......................................... 1-6
4.3 Daily Customer Checks ............. 1-7

COPYRIGHT © 2001 CANON INC.2001 2001 2001 2001 CANON DADF-H1 REV.0 MAR.2001
v
CONTENTS
1 BasicArrangement.............................. 3-1
1.1 Exterior Covers .......................... 3-1
1.1.1 Removing the ADF .............. 3-1
1.1.2 Detaching the front cover .... 3-3
1.1.3 Detaching the rear cover ...... 3-3
1.1.4 Detaching the feeder cover .. 3-4
1.1.5 Removing the feed roller
guide .................................... 3-4
2 Drive Mechanism ................................ 3-5
2.1 Pickup Motor ............................. 3-5
2.1.1 Releasing the pickup motor . 3-5
2.1.2 Mounting the pickup motor . 3-6
2.2 Feed Motor................................. 3-7
2.2.1 Releasing the feed motor ..... 3-7
2.2.2 Mounting the feed motor ..... 3-8
2.2.3 Disassembling the drive
mechanism ........................... 3-9
3 Feed System...................................... 3-12
3.1 Feeder Cover ............................ 3-12
3.1.1 Releasing the pickup roller as-
sembly................................ 3-12
3.1.2 Removing the pickup roller/
separation roller ................. 3-12
3.1.3 Mounting the pickup roller as-
sembly................................ 3-13
3.1.4 Releasing the registration roller,
upper .................................. 3-14
3.2 Feed System ............................. 3-15
3.2.1 Removing the separation plate/
separation pad .................... 3-15
3.2.2 Removing the feed station . 3-16
3.2.3 Removing the delivery reversal
roller, upper ....................... 3-17
3.2.4 Removing read roller 2 ...... 3-18
CHAPTER 3 MECHANICAL SYSTEMS
3.2.5 Removing the platen roller 3-19
3.2.6 Removing read roller 1 ...... 3-20
3.2.7 Removing the registration roller,
lower .................................. 3-21
3.2.8 Adjusting platen guide L ...3-23
3.2.9 Removing the delivery reversal
roller, lower........................ 3-24
3.2.10 Detaching read roller 2
roller .................................. 3-25
3.2.11 Replacing the separation
guide sheet ......................... 3-26
4 Electrical ........................................... 3-27
4.1 ADF Controller PCB ............... 3-27
4.1.1 Removing the ADF controller
circuit board ....................... 3-27
4.2 Feed Station Sensors ................ 3-27
4.2.1 Removing the sensor
assembly ............................ 3-27
4.2.2 Removing sensors .............. 3-28
4.3 Document Pickup Tray Sensors3-28
4.3.1 Removing the document width
detection variable resistor .. 3-28
4.3.2 Installing the document width
detection variable resistor .. 3-29
4.4 Other Sensors and Solenoids ... 3-30
4.4.1 Removing the ADF open/closed
sensor switch ..................... 3-30
4.4.2 Removing the cover open/
closed sensor ...................... 3-30
4.4.3 Removing the document set
sensor ................................. 3-30
4.4.4 Removing the locking
solenoid.............................. 3-31

COPYRIGHT © 2001 CANON INC. 2001 2001 2001 2001 CANON DADF-H1 REV.0 MAR. 2001
vi
CONTENTS
1 Parts Requiring Periodic
Replacement ....................................... 4-1
2 Expendable Parts Durability Table ..... 4-1
3 Periodic Service List........................... 4-2
4 Cleaning .............................................. 4-4
4.1 Reader Station Parts................... 4-4
4.1.1 Document table glass........... 4-4
4.1.2 document table glass retainer4-4
4.2 ADF Parts .................................. 4-4
4.2.1 Platen guide ......................... 4-4
4.2.2 Blank plate (crimp plate) ..... 4-4
4.3 rollers and Guides ...................... 4-5
4.3.1 Blank paper feed cleaning ... 4-5
4.3.2 Document pickup tray ......... 4-6
4.3.3 Pickup roller, separation
roller .................................... 4-6
CHAPTER 4 MAINTENANCE AND INSPECTION
4.3.4 Separation pad, separation
plate ..................................... 4-6
4.3.5 Registration roller, upper,
registration roller, lower,
separation guide ................... 4-7
4.3.6 Delivery reversal roller, upper,
delivery reversal roller,
lower .................................... 4-7
4.3.7 Reversal flapper ................... 4-8
5 Replacement ....................................... 4-9
5.1 Replacing the Feed Roller
Guide (Dust-collecting tape)...... 4-9
5.2 Replacing the Stamp ................ 4-10
6 Adjustment........................................ 4-11
6.1 Adjusting the Height ................ 4-11
1 Specifications and Adjustments .......... 5-1
1.1 Basic Adjustments...................... 5-1
1.1.1 Height adjustment ................ 5-1
1.1.2 Squareness adjustment......... 5-3
1.1.3 Scanning position
adjustment............................ 5-4
1.1.4 Horizontal registration
adjustment............................ 5-6
1.1.5 Scale adjustment .................. 5-9
1.1.6 Trailing registration
adjustment.......................... 5-13
1.2 Making Adjustments Following
Replacement of Key Parts........ 5-17
1.2.1 Overview............................ 5-17
1.2.2 Tray width detection variable
resistor adjustment mode ... 5-17
2 Troubleshooting ................................ 5-19
2.1 Corrective Actions by Fault ..... 5-19
2.1.1 E420 lit .............................. 5-19
2.1.2 E421 lit .............................. 5-19
2.1.3 E422 lit .............................. 5-19
CHAPTER 5 TROUBLESHOOTING
2.1.4 Black streaks appearing in a
printed image in the sub
scanning direction.............. 5-19
3 Electrical Parts Layout...................... 5-20
3.1 Sensors ..................................... 5-20
3.2 Motors, clutches, solenoids,
PCB, etc. .................................. 5-21
4 LEDs, Check Pins, and Switches
by PCB .............................................. 5-22
4.1 ADF Controller PCB ............... 5-22
4.1.1 Component layout ............. 5-22
4.1.2 DIP switch function list ..... 5-23
4.2 Junction PCB ........................... 5-26
4.3 Document Set LED PCB ......... 5-27
5 Self-Testing ....................................... 5-28
5.1 Overview .................................. 5-28
5.2 Alarms...................................... 5-29
5.3 Jams ......................................... 5-29
5.4 Errors ....................................... 5-30
5.5 Host I/O Displays .................... 5-31

COPYRIGHT © 2001 CANON INC.2001 2001 2001 2001 CANON DADF-H1 REV.0 MAR.2001
vii
CONTENTS
APPENDIX
1 General Timing Charts....................... A-1
1.1 Flow-Scanning a Single-sided A4
Document .................................. A-1
1.2 Scanning a Double-sided A4
Document, Face First,
Back Next.................................. A-2
2 Signal Name/Designation List........... A-3
3 General Block Diagram ..................... A-5
4 ADF Controller Block Diagram ........ A-6
5 Document Set Display Block
Diagram ........................................... A-11
6 Junction PCB Block Diagram ......... A-11
7 Jam Code List .................................. A-12
8 Special Tools List............................. A-13
9 Solvent/Grease List.......................... A-13

COPYRIGHT © 2001 CANON INC. 2001 2001 2001 2001 CANON DADF-H1 REV.0 MAR.2001
CHAPTER 1
GENERAL DESCRIPTION

1-1
CHAPTER 1 GENERAL DESCRIPTION
COPYRIGHT © 2001 CANON INC.2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001
1 Features
a.Flow scanning
Scanning is effected by flow scanning in all modes.
b.Document size recognition
The ADF recognizes document sizes in the length direction (feed direction) and in the
width direction and forwards the document size information to the host to which the ADF is
attached.
c.Double-sided document handling
Their reversal feature enables the ADF to handle double-sided documents.
d.Long-document mode
Long-document mode, when specified, allows the ADF to scan documents up to 630 mm
long.
e.Mixed loading of different sizes of documents adhering to different systems
The ADF supports mixed loading of documents of two different sizes.
* Mixed loading of documents of different sizes adhering to the AB and inch system is not
permitted.

CHAPTER 1 GENERAL DESCRIPTION
1-2
COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001
2 Specifications
2.1 Specifications
Item
Document pickup
method
Document set direction
Document set position
Document separation
method
Document type
Document size
Document tray loading
capacity
Document delivery sta-
tion loading capacity
Document processing
mode
Document size recogni-
tion
Leftover document rec-
ognition
Mixed document load-
ing feature
Book document
Specifications
Automatic pickup/delivery method
Document tray pickup: Face-up loading
Document tray pickup: Center standard
Top separation
Single-sided sheet document:
AB system 38 to 128 g/m2
Inch system 50 to 128 g/m2
Double-sided sheet document: 50 to 128 g/m2
AB system B6/A5/B5/A4/A5R/A4R/B4/A3
Inch system STMT/LTR/LTRR/LGL/11"x 17"
Document width: 148 (A5R) to 297 (A3) mm /
5.83 (A5R) to 11.69 (A3) in
Document length: 128 (STMT) to 432 (11" x
17") mm / 5.04 (STMT) to 17.01 (11 x 17) in
50 sheets
50 sheets
Single-sided and double-sided document han-
dling
Yes (Standard sizes only)
Available in conjunction with the host
Mixed loading of documents of different sizes
adhering to the same system
Mixed loading of documents of different sizes
adhering to different systems
• Mixes of document sizes adhering to different
systems available for loading
AB system A3/B4 A4/B5 B4/A4R B5/A5
Handled (documents up to 50 mm / 1.97 in in
thickness only)
Remarks
60 to 90 g/m2for docu-
ments longer than 432
mm / 17.01 in
Single-sided documents up
to 630 mm / 24.80 in long
available for scanning in
long-document mode
With paper weighing 80
g/m2or lighter
With paper weighing 80
g/m2or lighter
With paper weighing 80
g/m2or lighter
With paper weighing 80
g/m2or lighter
T01-201-01

1-3
CHAPTER 1 GENERAL DESCRIPTION
COPYRIGHT © 2001 CANON INC.2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001
Item
Communication with the
host
Input power requirement
Mass
Physical dimensions
Unit addresses
Operating environment
Temperature range
Humidity range
Specifications
IPC Communication 2.1
DC24VSupplied from the host to which the
ADF is attached.
Approx. 14 kg / 30.8 lb
565 (width) x 538 (depth) x 124 (height) mm /
22.24 (width) x 21.18 (depth) x 4.88 (height) in
A-system: XDDxxxxx
Inch/A-system: XDCxxxxx
AB system: XDBxxxxx
Inch/AB system: XDExxxxx
Conforming to the host.
Conforming to the host.
Remarks
T01-201-02
Specifications and other information are subject to change without notice.

CHAPTER 1 GENERAL DESCRIPTION
1-4
COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001
3 Names of Parts
3.1 Exterior View
F01-301-01
[1] Feeder cover
[2] Rear cover
[3] Slide guide
[4] Document pickup tray
[5] Front cover
[6] Document delivery station
[1]
[2]
[3] [4]
[5]
[6]

1-5
CHAPTER 1 GENERAL DESCRIPTION
COPYRIGHT © 2001 CANON INC.2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001
3.2 Cross-Sectional View
F01-302-01
[1] Registration roller, lower
[2] Registration roller, upper
[3] Separation roller
[4] Separation pad
[5] Separation plate
[6] Pickup roller
[7] Document pickup tray
[8] Delivery reversal roller, upper
[9] Delivery reversal roller, lower
[10] Read roller 2 roller
[11] Read roller 2
[12] Platen roller
[13] Read roller 1 roller
[14] Read roller 1
[1] [2] [3]
[4]
[5] [6]
[11]
[7]
[10] [8] [12][13][14] [9]

CHAPTER 1 GENERAL DESCRIPTION
1-6
COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001
4.Operation Descriptions
4.1 Document Set LED
The Document Set LED lights when a document is set in the document tray and flashes
when a document jams.
F01-401-01
4.2 Alarm Indications and Corrective Action
If the Document LED flashes while feeding a document, the document may have jammed.
Take corrective action as follows:
1) Remove the entire document from the document tray.
2) Opening the feeder cover, remove any jammed document.
3) Set the document in the ADF again after aligning it, from the first sheet afterwards.
Document Set LED

1-7
CHAPTER 1 GENERAL DESCRIPTION
COPYRIGHT © 2001 CANON INC.2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001
4.3 Daily Customer Checks
Instruct the user to clean the following points at least once each month:
Cleaning point
Rollers
Platen roller
Blank plate (crimp plate)
Document table glass
Document table glass retainer
Cleaning method
After wiping with a cloth
saturated with water, then
wrung tight or moistened
with alcohol, wipe dry.
Remarks
• Reader station part
• Reader station part
T01-403-01
Perform cleaning in the following sequence:
1) Opening the feeder cover, clean the
rollers (5) under the feeder cover with a
cloth saturated with water, then wrung
tight while turning them and then wipe
dry with a soft, dry cloth.
Clean the areas surrounding the rollers
likewise.
F01-403-01

CHAPTER 1 GENERAL DESCRIPTION
1-8
COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001
2) Opening the separation guide, clean
rollers (3) with a cloth saturated with
water, then wrung tight while turning
them and then wipe dry with a soft, dry
cloth.
Clean the areas surrounding the rollers
likewise.
F01-403-02
3) Turning rollers (4) with knob, clean
them with a cloth saturated with water,
then wrung tight while turning them
and then wipe dry with a soft, dry cloth.
F01-403-03
4) With the separation guide and the feeder
cover closed, open the ADF. Clean the
document table glass with a cloth satu-
rated with water, then wrung tight while
turning them and then wipe dry with a
soft, dry cloth.
F01-403-04

1-9
CHAPTER 1 GENERAL DESCRIPTION
COPYRIGHT © 2001 CANON INC.2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001
5) Clean the platen roller with a cloth satu-
rated with water, then wrung tight while
turning them and then wipe dry with a
soft, dry cloth.
Clean the sheets surrounding the rollers
likewise.
When the cleaning is completed, close
the ADF.
F01-403-05

CHAPTER 1 GENERAL DESCRIPTION
1-10
COPYRIGHT © 2001 CANON INC. 2000 2000 2000 2000 CANON DADF-H1 REV.0 MAR. 2001