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SERVICE
MANUAL
REVISION 0
FY8-13FB-000
AUG. 1998
COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
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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 INFORMATION NOT APPLICABLE TO
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INTRODUCTION This Service Manual contains basic facts and figures on the NP7161/NP7160 needed to service the machine in the field. This copier is designed to enable full automatic copying work, and comes with the following systems accessories: 1. ADF-G1* 2. Staper Sorter-L1* 3. MS-C1* 4. Cassette Feeding Module-C1 * NP7161 only. This Service Manual covers the copier only, and consists of the following chapters: Chapter 1 General Description introduces the copier’s features and specifications, sh
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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
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System Configuration The copier is designed to accommodate the following accessories: *NP7161 only. ADF-G1* Feeds a stack of original pages to the copyboard page by page. Control Card IV N Controls volumes MS-C1* Stapler Sorter-L1* of copying work. Sorts and groups up to In addition to the functions 10 sets of pages of a 10-bin sorter, staples automatically. sorted pages automatically. Cassette Feeding Module-C1 Provides an additional cassette. COPYRIGHT © 1998 CANON INC. CANON NP7161/NP716
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iv COPYRIGHT © 1998 CANON INC. CANON NP7161/NP7160 REV.0 AUG. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
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CONTENTS CHAPTER 1 GENERAL DESCRIPTION I. FEATURES .............................................. 1-1 IV. OPERATING THE MACHINE ................ 1-10 II. SPECIFICATIONS ................................... 1-2 A. Control Panel.................................... 1-10 A. Copier ................................................. 1-2 B. User Mode ........................................ 1-12 1. Type ............................................. 1-2 1. Outline ........................................
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CHAPTER 3 EXPOSURE SYSTEM I. OUTLINE OF OPERATION ..................... 3-1 1. Outline ........................................ 3-10 A. Changing the Reproduction Ratio...... 3-1 2. Detection of the Original Size II. LENS DRIVE SYSTEM ............................ 3-3 by the ADF ................................. 3-10 A. Driving the Lens ................................. 3-3 V. DISASSEMBLY/ASSEMBLY ................. 3-11 1. Outline .......................................... 3-3 A. Scanner Drive As
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1. Removing the Drum Unit ........... 4-28 1. Outline ........................................ 4-32 2. Cleaning the Photosensitive 2. Stringing the Charging Wires ..... 4-32 Drum ........................................... 4-29 3. Adjusting the Height of the Charging Wires .......................... 4-36 3. Removing the Cleaner G. Developing Assembly....................... 4-37 Thermistor .................................. 4-29 1. Removing the Developing D. Primary Charging Assembly ............
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CHAPTER 6 FIXING SYSTEM I. OUTLINE OF OPERATION ..................... 6-1 6. Removing the Main Thermistor ... 6-12 A. Outline ................................................ 6-1 7. Removing the Sub Thermistor ... 6-12 B. Controlling the Fixing Temperature ... 6-2 8. Removing the Fixing Upper Roller .......................................... 6-13 C. Error Detection Circuit ........................ 6-5 9. Removing the Fixing Lower 1. Outline .......................................... 6-5 Roller
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CHAPTER 8 INSTALLATION I. SELECTING THE SITE............................ 8-1 IV. INSTALLING THE CONTROL II. UNPACKING AND INSTALLATION ........ 8-2 CARD IV N ............................................. 8-13 A. Unpacking .......................................... 8-2 V. INSTALLING THE REMOTE DIAGNOSTIC DEVICE II .......................... 8-14 B. Removing the Metal Fixings............... 8-3 C. Mounting the Drum Unit ..................... 8-4 VI. INSTALLING THE ACCESSORY D. Cleaning the Parts
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B. Image Fault Samples ..................... 10-28 17. E800 ......................................... 10-51 C. Troubleshooting Image Faults ....... 10-29 18. E805 ......................................... 10-51 1. The copy is too light. 19. E821 ......................................... 10-51 (halftone area only) .................. 10-29 20. AC power is absent. ................. 10-52 2. The copy is too light. 21. DC power supply is absent. ..... 10-53 (including solid black area) ...... 10-30 2
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1. DC Controller PCB ................... 10-77 D. Display Mode [1] ............................ 10-84 2. Power Supply PCB .................. 10-80 E. I/O Display Mode [2]....................... 10-88 3. Lamp Regulator PCB ............... 10-80 F. Adjust Mode [3] .............................. 10-92 4. High-Voltage Power Supply G. Function Mode [4] .......................... 10-94 PCB .......................................... 10-81 H. Option Mode [5] .............................. 10-95 VII. SER
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CHAPTER 1 GENERAL DESCRIPTION This chapter introduces the copier’s features and specifications, shows how to operate the copier, and explains how copies are made. I. FEATURES .............................................. 1-1 A. Control Panel.................................... 1-10 II. SPECIFICATIONS ................................... 1-2 B. User Mode ........................................ 1-12 A. Copier ................................................. 1-2 V. ROUTINE MAINTENANCE III. NAMES
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CHAPTER 1 GENERAL DESCRIPTION I. FEATURES 1. The copier is designed light in weight (about 42 kg), and compact in size (566 mm wide, 541mm deep). 2. The copier turns out as many as 16 copies each minute (A4/LTR). 3. The addition of the Cassette Feeding Module-C1 (accessory) enables a source of paper capable of holding a maximum of 1,050 sheets. 4. The density may be adjusted to 33 different shades, or in automatic mode (AE). 5. The use of a photo mode promises faithful reproduction of halftone
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CHAPTER 1 GENERAL DESCRIPTION II. SPECIFICATIONS A. Copier 1. Type Body Desktop Copyboard Fixed Light source Halogen lamp (120V:200W/230V:220W) Lens Lens array Photosensitive material OPC (30 dia.) 2. Mechanisms Copying Indirect electrostatic Charging Corona Exposure Slit (moving light source) Copy density adjustment Auto or manual Development Dry (toner projection) Auto Front cassette (1 pc.) Pick-up 2 Manual Multifeeder (5 mm deep approx.; about 50 sheets of 8
