Canon DU-82 User manual

SERVICE
MANUAL
REVISION 0
COPYRIGHT 1999 CANON INC. CANON DUPLEXING UNIT DU-82 REV.0 JAN. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
RY8-1396-000
JAN. 1999
DUPLEXING UNIT

COPYRIGHT © 1999 CANON INC
Printed in Japan
Imprimé au Japon
Use of this manual should be
strictly supervised to avoid
disclosure of confidential
information.
Prepared by
PERIPHERAL PRODUCTS QUALITY PLANNING DIV.
PERIPHERAL PRODUCTS TECHNICAL DOCUMENTATION DEPT.
CANON INC.
5-1, Hakusan 7-chome, Toride-City, Ibaraki-Pref. 302-8501, Japan

PREFACE
This Service Manual contains basic information required for after-sales service of the
Duplexing unit DU-82. This information is vital to the service technician in maintaining the
high print quality and performance of the duplexing unit.
This manual consists of the following chapters:
Chapter 1: Product information
Features, specifications, parts of the duplexing unit, and installation
Chapter 2: Operation and Timing
A description of the operating principles and timing sequences of the electrical and
mechanical systems.
Chapter 3: The Mechanical System
Explanation of mechanical operation, disassembly, reassembly, and adjustment
procedures
Chapter 4: Troubleshooting
Maintenance and servicing, measurement and adjustments, troubleshooting
procedures, and location of electrical components
Appendix: General timing chart, general circuit diagram, and list of signals.
Information in this manual is subject to change as the product is improved or redesigned.
All relevant information in such cases will be supplied in Service Information Bulletins.
A thorough understanding of this unit, based on information in this Manual and Service
Information Bulletins is required for maintaining its performance and for locating and repairing
malfunctions.

DTP system
This manual was produced on an Apple PowerMacintosh 9500/200 personal computer and output by an
Apple LaserWriter 16/600 PS laser beam printer; final pages were printed on AGFA Selectset avantra 25.
All graphics were produced with Macromedia FreeHand (J), and all documents and page layouts were
created with QuarkXPress (E).
The video images were captured with SONY degital video camcorder and Radius PhotoDV capture
board system, and modified with Adobe Photoshop(J).

CONTENTS
CHAPTER 1 PRODUCT INFORMATION
I. FEATURES ............................. 1-1
II. SPECIFICATIONS.................... 1-2
III. PARTS OF THE DUPLEXING
UNIT ...................................... 1-3
A. External Views .................. 1-3
B. Cross Sectional Views........ 1-3
IV. INSTALLATION ....................... 1-4
CHAPTER 2 OPERATION AND TIMING
CHAPTER 3 THE MECHANICAL SYSTEM
CHAPTER 4 TROUBLESHOOTING
I. BASIC OPERATION ................. 2-1
A. Outline of the Electrical
System .............................. 2-1
B. Duplexing Driver Input
Signals .............................. 2-2
C. Duplexing Driver Output
Signals .............................. 2-3
II. PAPER PICK-UP/FEED
SYSTEM ................................. 2-4
A. Operation .......................... 2-4
B. Paper Jam Detection ......... 2-10
I. PREFACE .............................. 3-1
II. EXTERNALS .......................... 3-2
A. Locations ......................... 3-2
B. External Covers ................ 3-3
III. SENSORS .............................. 3-5
A. Locations ......................... 3-5
B. Duplex Feed Roller 1
Home Position Sensor ...... 3-6
C. Duplexing Unit Paper
Sensor .............................. 3-6
D. Side Registration Guide
Home Position Sensor ...... 3-7
E. Reversing Sensor .............. 3-7
IV. CLUTCH/SOLENOIDS ............ 3-8
A. Locations ......................... 3-8
B. Reversing Roller Release
Solenoid ........................... 3-9
C. Duplex Deflector Solenoid 3-10
D. Duplex Feed Clutch .......... 3-11
V. MOTORS ............................... 3-12
A. Locations ......................... 3-12
B. Duplexing Unit Motor ....... 3-13
C. Side Registration Motor .... 3-13
VI. ELECTRICAL PARTS .............. 3-14
A. Locations ......................... 3-14
B. Duplexing Driver PCB ....... 3-15
I. PREFACE ............................... 4-1
A. Malfunction Diagnosis
Flowchart .......................... 4-1
B. Initial Checks.................... 4-3
II. IMAGE DEFECTS.................... 4-4
III. PAPER JAMS .......................... 4-5
IV. PAPER TRANSPORT
MALFUNCTION....................... 4-6
V. MALFUNCTION
TROUBLESHOOTING .............. 4-7
VI. MALFUNCTION STATUS
TROUBLESHOOTING .............. 4-9

VII. MEASUREMENT AND
ADJUSTMENT ........................ 4-11
A. Mechanical Adjustment ..... 4-11
B. Electrical Adjustment........ 4-11
C. Variable resistors, LEDs,
test pins, jumpers, and
switches on PCB ................ 4-11
VIII.MAINTENANCE AND
SERVICING............................. 4-12
A. Periodic Replacement
Parts ................................. 4-12
B. Expected Lives of Consumable
Parts ................................. 4-12
C. Regular Servicing
Schedule ........................... 4-12
D. Standard Tools .................. 4-12
E. Special Tools ..................... 4-12
F. List of Lubricants and
Cleaners ............................ 4-12
IX. LOCATION OF CONNECTORS.. 4-13
APPENDIX
I. GENERAL TIMING CHART ...... A-1
II. GENERAL CIRCUIT DIAGRAM. A-2
III. LIST OF SIGNALS ................... A-3

CHAPTER 1
PRODUCT INFORMATION
I. FEATURES ............................. 1-1
II. SPECIFICATIONS.................... 1-2
III. PARTS OF THE DUPLEXING
UNIT ...................................... 1-3
IV. INSTALLATION ....................... 1-4

1 - 1
CHAPTER 1
I. FEATURES
1. Optional built-in type duplexing unit
The duplexing unit is compact in size and can be installed inside the printer.

II. SPECIFICATIONS
1. Print paper A3, A4, B4, A5, B5, Ledger, Legal, Letter and Executive size plain
paper (64g/m2- 105g/m2recommended paper)
2. Power supply DC24V (supplied from printer)
3. Dimensions 379 (W) ×423 (D) ×82 (H) mm
4. Weight About 3.5kg
Specifications are subject to change with product modification.
1 - 2
CHAPTER 1