Canon NP6512 Manuel utilisateur

1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

REVISION 0

FY8-13GB-000

AUG. 1999

1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

IMPORTANT

THIS DOCUMENTATION IS PUBLISHED BY CANON INC., JAPAN,TO SERVE AS A SOURCE

OF REFERENCE FOR WORK INTHE FIELD.

SPECIFICATIONS AND OTHER INFORMATION CONTAINED HEREIN MAY VARY SLIGHTLY

FROM ACTUAL MACHINE VALUES OR THOSE FOUND IN ADVERTISING AND OTHER

PRINTED MATTER.

ANYQUESTIONSREGARDINGINFORMATION CONTAINED HEREIN SHOULDBEDIRECTED

TOTHE COPIER SERVICE DEPARTMENT OF THE SALES COMPANY.

THIS DOCUMENTATION IS INTENDED FOR ALL SALES AREAS, AND MAY CONTAIN INFOR-

MATION NOT APPLICABLETO CERTAIN AREAS.

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 PRODUCTSTECHNICAL SUPPORT DIVISION

CANON INC.

5-1, Hakusan 7-chome,Toride-shi, Ibaraki 302-8501 Japan

1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

INTRODUCTION

This service manual has been prepared for NP6512, NP6612, NP7120, NP7130, and

NP7130F, providing basic information used for servicing the machines in the field so as to

ensure their quality and performance.

This service manual consists of the following chapters:

Chapter 1

General Description

introduces the machine's features, specifications,

names of parts, and how originals are reproduced.

Chapter 2

Basic Operation

explains how copies are made on a step-by-step basis.

Chapter 3

Exposure System

discusses the principles of operation used for the

machine's exposure system. It also explains the timing at which exposure-

related mechanisms are operated, and shows how they may be

disassembled/assembled and adjusted.

Chapter 4

Image Formation System

discusses the principles of operation used for the

machine's image formation system. It also explains the timing at which image

formation-related mechanisms are operated, and shows how they may be

disassembled/assembled and adjusted.

Chapter 5

Pick-Up/Feeding System

discusses the principles of operation used for the

machine's pickup/feeding system. It also explains the timing at which pickup/

feeding-related mechanisms are operated, and shows how they may be

disassembled/assembled and adjusted.

Chapter 6

Fixing System

discusses the principles of operation used for the machine's

fixing system. It also explains the timing at which fixing-related mechanisms

are operated, and shows how they may be disassembled/assembled and

adjusted.

Chapter 7

Externals/Auxiliary Mechanisms

discusses the principles of operation used

for the machine's externals/auxiliary mechanisms. It also explains the timing

at which auxiliary mechanism-related mechanisms are operated, and shows

how they may be disassembled/assembled and adjusted.

Chapter 8

ADF

explains the principles of operation of the ADF in view of electrical and

mechanical functions and in relation to their timing of operation. It also shows

how the unit may be disassembled/assembled and adjusted.

Chapter 9

Installation

introduces requirements for the site of installation, and shows

how the machine may be installed using step-by-step instructions.

Chapter 10

Maintenance and Servicing

provides tables of periodically replaced parts and

consumables/durables and scheduled servicing charts.

Chapter 11

Troubleshooting

provides tables of maintenance/inspection, standards/

adjustments, and problem identification (image fault/malfunction).

Appendix contains a general timing chart and general circuit diagrams.

1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

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.

Inthe diagrams, represents the path of mechanical drive—where a signal name

accompanies the symbol , the arrow indicates the direction of the electric sig-

nal.

The expression “turn on the power” means flipping on the power switch, closing the

front door, and closing the delivery unit door, which results in supplying the machine

with power.

2. In the digital circuits, ‘1’ is used to indicate that the voltage level of a given signal is

“High,” while ‘0’ is used to indicate “Low.” (The voltage value, however, differs from

circuit to circuit.)

Inpracticallyallcases,the internal mechanisms of amicroprocessor cannotbe checked

in the field. Therefore, the operations of the microprocessors used in the machines

are not discussed: they are explained in terms of from sensors to the input of the DC

controller PCB and from the output of the DC controller PCB to the loads.

The descriptions in this Service Manual are subject to change without notice for

product improvement or other reasons, 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.

1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

iii

Model

NP6512

NP6612

NP7120

NP7130

NP7130F

Type

code

TWA

TXA

PUB

PUC

NVF

PTZ

NVH

Default

ratio

2R2E

3R1E

2R2E

3R1E

ADF as

standard

√

Cassette

250 sheets

Universal

500 sheets

The notation “√” indicates that the item in question is available.

• This service manual covers the models shown in the following table. Be sure to have a

good understanding of the difference from model to model before referring to this

manual.

1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CONTENTS

CHAPTER 1 GENERAL DESCRIPTION

CHAPTER 2 BASIC OPERATION

CHAPTER 3 EXPOSURE SYSTEM

I. FEATURES ..................................1-1

II. SPECIFICATIONS .......................1-2

A. Copier....................................1-2

B. ADF .......................................1-6

III. NAMES OF PARTS .....................1-8

A. External View ........................1-8

B. Cross Section..................... 1-11

IV. USING THE MACHINE ............. 1-13

A. Control Panel...................... 1-13

B. User mode.......................... 1-15

V. ROUTINE MAINTENANCE BY THE

USER ........................................ 1-16

VI. IMAGE FORMATION ................ 1-19

A. Outline................................ 1-19

I. BASIC OPERATIONS ..................2-1

A. Functional Construction ........2-1

B. Outline of Electrical

Circuitry .................................2-2

C. Basic Sequence of

Operations.............................2-3

D. Controlling the Main

Motor (M1).............................2-5

E. Inputs to and Outputs from the

DC Controller ........................2-7

I. OPERATIONS ..............................3-1

A. Outline...................................3-1

B. Varying the Reproduction

Ratio......................................3-2

C. Lens Drive System................3-3

D. Scanner Drive System ..........3-4

II. EXPOSURE SYSTEM .................3-9

A. Controlling the Scanning

Lamp .....................................3-9

III. DISASSEMBLY/ASSEMBLY ..... 3-13

A. Scanner Drive Assembly.... 3-14

B. Lens Drive Assembly ......... 3-32

C. Exposure System............... 3-38

1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

CHAPTER 4 IMAGE FORMATION SYSTEM

CHAPTER 5 PICK-UP/FEEDING SYSTEM

I. IMAGE FORMATION SYSTEM ...4-1

A. Outline...................................4-1

B. Timing Chart for the Image

Formation System .................4-3

C. Primary Charging Roller Bias

Control...................................4-4

D. Controlling the Transfer Roller

Bias .......................................4-9

E. Controlling the Developing/

Separation Static Eliminator

Bias .................................... 4-12

F. Measuring the Density of

Originals ............................. 4-18

G. Controlling the Pre-Exposure

Lamp .................................. 4-24

H. Controlling the Side Blanking

Mechanism......................... 4-26

II. DEVELOPING ASSEMBLY

/CLEANING ASSEMBLY........... 4-27

A. Outline................................ 4-27

B. Detecting the Level of

Toner .................................. 4-28

C. Detecting Waste Toner ....... 4-30

D. Primary Charging Roller

Cleaning Control ................ 4-31

III. DISASSEMBLY/ASSEMBLY ..... 4-33

A. Drum Unit ........................... 4-34

B. Transfer Charging

Assembly............................ 4-38

C. Blank Exposure.................. 4-39

D. Developing Assembly......... 4-43

I. PICKUP/FEEDING SYSTEM.......5-1

A. Outline...................................5-1

B. Controlling the Pickup

Roller .....................................5-2

C. Controlling the Movement of

Paper.....................................5-6

D. Detecting Jams .....................5-8

II. DISASSEMBLY/ASSEMBLY ..... 5-13

A. Pickup Assembly................ 5-14

B. Multifeeder Assembly......... 5-21

C. Feeding Assembly.............. 5-24

D. Registration Roller

Assembly............................ 5-25

E. Delivery Assembly.............. 5-30

CHAPTER 6 FIXING SYSTEM

I. OPERATIONS..............................6-1

A. Outline...................................6-1

B. Controlling the Fixing

Temperature ..........................6-3

II. DISASSEMBLY/ASSEMBLY ........6-9

A. Fixing Assembly ................. 6-10

1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

vii

CHAPTER 7 EXTERNALS/AUXILIARY MECHANISMS

CHAPTER 8 ADF

CHAPTER 9 INSTALLATION

I. FANS............................................7-1

II. POWER SUPPLY SYSTEM.........7-3

A. Outline of the Power Supply

System ..................................7-3

B. Power Supply Circuit .............7-4

C. Detecting an Error on the Com-

posite Power Supply PCB .....7-6

D. Protecting the Power Supply

Circuit ....................................7-6

III. DISASSEMBLY/ASSEMBLY ........7-7

A. External Covers.....................7-8

B. Control Panel...................... 7-15

C. Copyboard Glass ............... 7-16

D. Main Motor/Main Drive Assem-

bly....................................... 7-17

E. Electrical System ............... 7-21

I. ADF ..............................................8-1

A. Outline...................................8-1

B Basic Construction ................8-2

C. Basic Operations...................8-4

D. Detecting an Original ............8-6

E. Pickup Operation...................8-8

F. Delivery .............................. 8-12

G. Controlling the Pickup

Motor .................................. 8-14

H. Controlling the Belt Motor .. 8-15

I. Detecting Original Jams..... 8-16

J. Power Supply ..................... 8-17

II. DISASSEMBLY/ASSEMBLY ..... 8-18

A. Removing the ADF............. 8-19

B. External Covers.................. 8-21

C. Drive System...................... 8-23

D. Feeding System ................. 8-26

E. Electrical System ............... 8-33

I. SELECTING THE SITE ...............9-1

II. UNPACKING AND

INSTALLATION ............................9-2

A. Unpacking and Installation....9-2

B. Placing Copy Paper............ 9-18

III. MOVING THE MACHINE .......... 9-21

CHAPTER 10 MAINTENANCE AND SERVICING

I. PERIODICALLY REPLACED

PARTS....................................... 10-1

II. DURABLES AND

CONSUMABLES ...................... 10-1

III. SCHEDULED SERVICING ....... 10-1

1999 CANON INC. CANON NP6512/6612/7120/7130/7130F REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)

viii

APPENDIX

CHAPTER 11 TROUBLESHOOTING

A. GENERAL TIMING CHART........ A-1

B. SIGNALS AND

ABBREVIATIONS ....................... A-3

C. GENERAL CIRCUIT DIAGRAM . A-5

D. DC CONTROLLER CIRCUIT

DIAGRAM ................................... A-7

E. ADF CONTROLLER CIRCUIT

DIAGRAM ................................. A-15

F. COMPOSITE POWER SUPPLY

CIRCUIT DIAGRAM.................. A-19

G. CONTROL PANEL CIRCUIT

DIAGRAM ................................. A-29

H. AE SENSOR CIRCUIT

DIAGRAM ................................. A-31

I. SENSOR CIRCUIT

DIAGRAM ................................. A-32

J. NOISE FILTER CIRCUIT

DIAGRAM ................................. A-33

K. HIGH VOLTAGE CONTACT CIRCUIT

DIAGRAM ................................. A-34

L. BLANK EXPOSURE (front) CIRCUIT

DIAGRAM ................................. A-35

M. BLANK EXPOSURE (rear) CIRCUIT

DIAGRAM ................................. A-36

N. PRE-EXPOSURE CIRCUIT

DIAGRAM ................................. A-37

O. SPECIAL TOOLS...................... A-38

P. SOLVENTS/OILS ...................... A-39

I. MAINTENANCE AND

INSPECTION ............................ 11-3

A. Image Adjustment Basic

Procedure........................... 11-3

B. Points to Note for

Servicing ............................ 11-4

II. STANDARDS AND

ADJUSTMENTS ....................... 11-5

A. Mechanical ......................... 11-5

B. ADF .................................. 11-30

C. Electrical........................... 11-41

III. TROUBLESHOOTING IMAGE

FAULTS ................................... 11-52

A. Making Initial Checks ....... 11-52

B. Sample Image Faults ....... 11-56

C. Troubleshooting Image

Faults................................ 11-57

IV.TROUBLESHOOTING

MALFUNCTIONS.................... 11-65

A. Troubleshooting

Malfunctions ..................... 11-65

V. TROUBLESHOOTING FEEDING

PROBLEMS ............................ 11-77

A. Copy Paper Jam............... 11-77

B. Faulty Feeding.................. 11-80

VI. ARRANGEMENT AND FUNCTIONS

OF ELECTRICAL PARTS ....... 11-81

A. Sensors and Solenoids.... 11-81

B. Switches........................... 11-82

C. Lamp, Heater, Motor, Etc. 11-83

D. PCBs ................................ 11-84

E. ADF .................................. 11-85

F. Variable Resistors (VR) and

Check Pins by PCB.......... 11-86

VII. SERVICE MODE..................... 11-88

A. Outline.............................. 11-88

B. Using Service Mode......... 11-88

C. Adjustment Mode (30)...... 11-91

D. Operation/Inspection

Mode (40)......................... 11-92

E. Machine Settings

Mode (50)......................... 11-93

F. Counter Mode (60)........... 11-93

VIII.SELF DIAGNOSIS .................. 11-94

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