Canon NP-70 User manual

CANON

SERVICE

MANUAL

NP•70

Total

Guaranty

System

CANON

INC.

CANON

SERVICE

MANUAL

NP•70

CANON

INC.

PREFACE

This

manual

published

for

use

service

technicians

when

servicing

the

Canon

-70

photo-

copier.

recommended

that

the

service

technician

use

this

manual

confunction

with

the

-70

Parts

Catalog,

the

-70

Service

Handbook

and

other

publications

when

performing

his

main-

tenance

work.

The

use

all

-70

—related

publications

will

ensure

that

the

repairman

retains

his

familiarity

with

all

changes,

and

will

enhance

his

overall

knowledge

the

-70.

The

first

and

second

chapters

this

manual

are

introductory

nature.

They

stress,

respectively,

operator

&process

familiarity

and

generalized

machine

operation.

These

two

chapters

are

also

useful

for

training

promotional

purposes.

The

remaining

chapters

are

each

specific

nature

and

form

the

bulk

the

publication.

When

working

the

-1100,

frequent

reference

these

chapters

will

ensure

that

all

adjustments,

proce-

dures,

tolerances,

etc.

are

satisfied.

Also,

for

the

convenience

the

service

technician,

circuit

diagrams

and

layouts

have

been

appended

the

rear

the

manual.

This

service

manual

written

with

the

intent

that

applicable

all

-70

copiers,

regardless

product

number.

Thus,

any

section

which

deals

with

specific

product

numbers)

identified.

This

manual

contains

information

perform

servicing

the

following

-70

photocopiers:

~`"''

~~~

Prod.

No.

Input

Voltage

General

Destination

Manufacturing

Location

8-11154

230VAC

10%

(SOHz)

NOTE:

Switch

built-in

for

using

220VAC

240VAC

Europe

Japan

8-11155

Same

8-11154

Europe,

Africa,

Middle

East

Germany

8-11156

100VAC

10%

(SOHz)

Universal

with

adapter

pedestal

Japan

8-11157

100VAC

10%

(60Hz)

Universal

with

adapter

pedestal

Japan

8-11158

230VAC

10%

(SOHz)

South

East

Asia

South

America

Central

America

Japan

8-11184

240VAC

10%

(SOHz)

Australia

Japan

~~~

welcome

your

comments

the

contents

this

-70

Service

Manual.

Canon

Inc.

Business

Machines

Service

Division

Electrostatic

Photocopiers

Technical

Support

Section

CANON

INC.

POINT

DIFFERENCE

This

table

shows

the

point

difference

between

Second

Printing

and

Third

Printing

Page

First

Printing

Change

Addition

Second

Printing

2-10

Sprocket

3-8

RSW

Multiple

-Switch

deletion

4-19

,the

Illumination

Assembly

and

the

,the

right

upper

ADJUSTMENTS

The

width

the

aperture

slit

-adjustable

mask

blades

mask

blades

(see

Fig.

4-24).

ADJUSTMENTS

The

adjustment

- -

(see

Fig.

4-24).

423

Fig.

4-28

Flange

(rear)

Flange

(front)

[NOTICE]

PROCEDURES

DRUM

CYLINDER

4-24

4.5-1

becomes

approx.

1800

100

volts.

becomes

approx.

1800

bolts.

4.5-2

Table

4-1

Corona

Wire

Specifications

Standard

High

16.5

0.5

9.5

0.5

Standard

Hight

about

16.5

(refer

\Table

)

about

9.5

(refer

\Table

)

4-26

Perform

the

replacement

Assembly

follows

Perform

the

replacement

Assembly

Transfer

Corona

Assembly

follows

[Addition]

Paper

Guide

Wire

Replacement

Transfer

Corona

Charge

4-51

4.9-1

The

-70

has

four

(4)

The

-70

has

s}x

(6)

4-52

97-5924

10.5

1.0

84.5

O O

97-5925

10.5

1.0

84.5

Table

4-3

Letter

97-5924

10.0

1.0

Universal

97-5924

10.0

1.0

4-53

Table

4-4

Letter

400

100

1200

100

Universal

400

100

1200

100

[NOTICE]

CANON

INC.

Page

First

Printing

Change

Addition

Second

Printing

4-54

Fig.

4-58

Roller

Drive

Sprocket

(A)

Chain

Roller

Drive

Sprocket

(B)

Roller

Drive

Sprocket

(A)

Roller

Drive

Sprocket

Idler

Sprocket

I,r'

Ladder

Chain

Roller

Drive

Sprocket

(B)

(A)

4-63

Fig.4-71

Tension

Sprocket

Tension

Sprocket

~`~

Tension

Sprocket

Chain

Drive

Sprocket

Chain

Drive

rocket

4-71

Fig.4-83

-down

Actuation

Lever

-down

Actuation

4-104

the

rest

button

(and

the

arm

tripping

the

micro-

switches)

moving

upward.

the

rest

button

pushed

the

lever

and

the

arm

tripping

the

micro

switches

move

upward.

B-4

Circuit

C-3

NFB4

X62-1047

125

VAC

NFB4

X62-1074

250

VAC

C-7

R131

R132

R133

deletion

CANON

INC.

TABLE

CONTENTS

GUIDE

THE

-70

1.1

FEATURES

THE

-70

COPIER

1.2

APPEARANCE

1.3

SPECIFICATIONS

1—

1.3-1

Performance

Specifications

1—

1.3-2

Physical

Specifications

1—

1.3-3

Paper

Specifications

1—

1.3-4

Colors

Paper

Available

from

Canon

1—

1.4

OPERATING

PROCEDURES

1—

1.4-1

Preparation

1—

1.4-2

Placing

Original

1—

1.4-3 Loading

Paper

1—

1.4-4

Copying

Operations

1—

1.4-5

Image

Density

1—

1.4-6

Handling

Paper

&Loading

Paper

Cassette

1—

1.5

IMAGE

FORMING

PROCESS

THE

-70

1—

OUTLINE

-70

OPERATION

2.1

BREAKDOWN

THE

-70

2—

2.2

PARTS

NOMENCLATURE

2—

2.3

OUTLINE

MAIN

ASSEMBLIES

2—

2.3-1

Copyboard

Assembly

2—

2.3-2

Illumination

Assembly

2—

2.3-3

Optical

Assembly

2—

2.3-4

Drum

Assembly

2—

2.3-5

Corona

Assemblies

2—

2.3-6

Developer

Assembly

2—

2.3-7

Drum

Cleaner

Assembly

2—

2.3-8

Cassette

and

Cassette

Holder

Assemblies

2—

2.3-9

Paper

Pickup

Roller

Assembly

2—

2.3-10

Copy

Conveying

Assembly

2—

2.3-11

Heater

Assembly

2—

2.3-12

Blowers

and

Fans

2—

2.3-13

Copy

Selector

Subassembly

2—

2.3-14

Safety

Assembly

2—

CANON

INC.

2.3-15

Copyboard

Driving

Mechanism

Assembly

2—

2.3-16

Pedestal

Assembly

2—

2.4

OUTLINE

THE

DRIVE

SYSTEM

2—

2.5

OUTLINE

"ORIGINAL"

MOVEMENT

2-12

2.6

OUTLINE

COPY

PAPER

MOVEMENT

2-13

ELECTRICAL

3.1

CIRCUIT

3.2

GENERAL

3.2-1

3.2-2

3.2-3

3.3

SIGNIFICANT

SYSTEM

DIAGRAM

GRAPHIC

SYMBOLS

EXPLANATION

CIRCUIT

OPERATION

3—

3-14

3-27

3-33

When

Power

Turned

"ON"

(START;

When

Copies

are

Desired

(COPY

When

Copy

Paper

Fails

Exit

the

Copier

(JAM

OPERATION

TIMES

3.3-1

Heater

Wait

Time

3-33

3.3-2

Warm-up

Time

3-33

3.3-3

Prestart

for

the

First

Feed

Interval

3-33

3.3-4

First

Feed

Interval

3-34

3.3-5

Prestart

Time

3-34

3.3-6

Copying

Cycle

3-34

3.3-7

Second

Feed

Interval

3-35

3.3-8

Neutral

Time

3-35

3.3-9

STANDBY

3-35

3.4

OUTLINE

ELECTRICAL

COMPONENTS

AND

CIRCUITS.

3-39

3.4-1

Switchable

Taps

for

Line

Voltage

Compensation

3-39

3.4-2

Line

Voltage

Filter

3-39

3.4-3

Rectification

Circuit

Card

3-39

3.4-4

"Rapid

-Start"

Illumination

Circuit

3-40

3.4-5

Heater

Wait

Control

Circuit

3-41

3.4-6

Developer

Monitoring

Circuitry

3-47

3.4-7

Developer

Temperature

Control

Circuit

3-49

3.4-8

Paper

Cassette

Monitoring

Circuitry

3-51

3.4-9

Heater

Control

Circuit

3-54

3.4-10

Heater

Control

Circuit

"Zero

-Cross"

3-59

3.4-11

Voltage

Adapter

Pedestal

3-64

MECHANICAL

SYSTEM

4.1

COPYBOARD

ASSEMBLY

4—

CANON

INC.-

4.1-1

Outline

Assembly

Operation

4.1-2

Assembly

Main

Components

4.1-3

Removal/Installation

Actions

4.1-4

Repair/Servicing

Actions

4.2

ILLUMINATION

ASSEMBLY

4.2-1

Outline

Assembly

Operation

4.2-2

Assembly

Main

Components

4.2-3

Removal/Installation

Actions

4-11

4.2-4

Repair/Servicing

Actions

4-12

4.3

OPTICAL

ASSEMBLY

4-13

4.3-1

Outline

Assembly

Operation

4-13

4.3-2

Assembly

Main

Components

4-14

4.3-3

Removal/Installation

Actions

4-15

4.3-4

Repair/Servicing

Actions

4-19

4.4

DRUM

ASSEMBLY

4-20

4.4-1

Outline

Assembly

Operation

4-20

4.4-2

Assembly

Main

Components

4-20

4.4-3

Removal/Installation

Actions

4-22

4.4-4

Repair/Servicing

Actions

4-23

4.5

CORONA

ASSEMBLIES

4-24

4.5-1

Outline

Assembly

Operation

4-24

4.5-2

Assembly

Main

Components

4-24

4.5-3

Removal/Installation

Actions

4-25

4.5-4

Repair/Servicing

Actions

4-29

4.6

DEVELOPER

ASSEMBLY

4-30

4.6-1

Outline

Assembly

Operation

4-30

4.6-2

Assembly

Main

Components

4-31

4.6-3

Removal/Installation

Actions

4-39

4.6-4

Repair/Servicing

Actions

4-41

4.7

DRUM

CLEANER

ASSEMBLY

4-44

4.7-1

Outline

Assembly

Operation

4-44

4.7-2

Assembly

Main

Components

4-44

4.7-3

Removal/Installation

Actions

4-46

4.7-4

Repair/Servicing

Actions

4-46

4.8

CASSETTE

HOLDER

ASSEMBLY

4-49

4.8-1

Outline

Assembly

Operation

4-49

4.8-2

Assembly

Main

Components

4-49

4.8-3

Removal/Installation

Actions

4-50

CANON

INC_

4.8-4 Repair/Servicing

Actions

4-50

4.9

PAPER

CASSETTE

ASSEMBLIES

4-51

4.9-1

Outline

Assembly

Operation

4-51

4.9-2

Assembly

Main

Components

4-51

4.9-3

Removal/Installation

Actions

4-52

4.9-4

Repair/Servicing

Actions

4-52

4.10

PAPER

PICKUP

ROLLER

ASSEMBLY

(w/

CONTROLER

ASSEMBLY)

4-54

4.10-1

Outline

Assembly

Operation

4-54

4.10-2

Assembly

Main

Components

4-62

4.10-3

Removal/Installation

Actions

4-63

4.10-4

Repair/Servicing

Actions

4-64

4.11

COPY

CONVEYING

ASSEMBLY

4-73

4.11-1

Outline

Assembly

Operation

4-73

4.11-2

Assembly

Main

Components

4-73

4.1

1-3

Removal/Installation

Actions

4-76

4.1

1-4

Repair/Servicing

Actions

4-78

4.12

PAPER

SEPARATING

SUBASSEMBLY

4-81

4.12-1

Outline

Assembly

Operation

4-81

4.12-2

Assembly

Main

Components

4-82

4.12-3

Removal/Installation

Actions

4-83

4.12-4

Repair/Servicing

Axtions

4-84

4.13

HEATER

ASSEMBLY

4-85

4.13-1

Outline

Assembly

Operation

4-85

4.13-2

Assembly

Main

Components

4-86

4.13-3

Removal/Installation

Actions

4-87

4.13-4

Repair/Servicing

Actions

4-87

4.14

BLOWER

&FAN

ASSEMBLIES

4-88

4.14-1

Outline

Assembly

Operation

4-88

4.14-2

Assembly

Main

Components

4-88

4.14-3

Removal/Installation

Actions

4-90

4.14-4

Repair/Servicing

Actions

4-90

4.15

COPY

SELECTOR

SUBASSEMBLY

4-92

4.15-1

Outline

Assembly

Operation

4-92

4.15-2

Assembly

Main

Components

4-92

4.15-3

Removal/Installation

Actions

4-96

4.15-4

Repair/Servicing

Actions

4-97

4.1.6

SAFETY

ASSEMBLY

CANON

INC.

4.16-1

Outline

Assembly

Operation

4.16-2

Assembly

Main

Components

4.16-3

Removal/Installation

Actions

4.16-4

Repair/Servicing

Actions

4—

4-104

4.17

COPYBOARD

DRIVING

MECHANISM

ASSEMBLY

4-106

4.17-1

Outline

Assembly

Operation

4-106

4.17-2

Assembly

Main

Components

4-108

4.17-3

Removal/Installation

Actions

4-112

4.17-4

Repair/Servicing

Actions

4-112

APPENDIX

(COPIER

-GENERAL)

Microswitch

Timing

Chart,

All

Copiers

A-1

Photocopier

Schematic

Diagram,

Prod.

No.

8-1

54/5

A-2

Photocopier

Schematic

Diagram,

Prod.

No.

8-11156/57

A-3

Photocopier

Schematic

Diagram,

Prod.

No.

8-11158/84

A-4

Photocopier

Wiring

Diagram,

Prod.

No.

8-11154/55

A-5

Photocopier

Wiring

Diagram,

Prod.

No.

8-1

54/55

A-6

Photocopier

Wiring

Diagram,

Prod.

No.

8-11156/57

A-7

Photocopier

Wiring

Diagram,

Prod.

No.

8-1

58/84

A-8

APPENDIX

(SPECIFIC

CIRCUITS)

Heater

Control

Circuit

Schematic

Diagrams

B-1

Printed

-Circuit

Board

Layouts

B-2

Printed

-Circuit

Board

Layouts

B-3

Printed

-Circuit

Board

Layouts

B-4

APPENDIX

(ELECTRICAL

PARTS)

Parts

List

-Copier

Common

Components

C-1

Parts

List

-Product

Number

Distinctive

Components

C-7

Parts

List

-Heater

Control

Circuits

C-9

LIST

ILLUSTRATIONS

Fig.

1-1

General

View

the

-70

1—

Fig.

1-2

Control

Panel

1—

Fig.

1-3

Original

Positioning

Copyboard

Fig.

2-1

Breakdown

the

-70

2—

Fig.

2-2

-70

Parts

Nomenclature

2—

CANON

INC.

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