Brother MFC-9420CN Service-Handbuch - Seite 4

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TABLE OF CONTENTS

CHAPTER 1

PARTS NAMES & FUNCTIONS

1.1

EQUIPMENT OUTLINE.............................................................................................1-1

1.2

CONTROL PANEL ....................................................................................................1-2

1.3

COMPONENTS .........................................................................................................1-4

CHAPTER 2

SPECIFICATIONS

2.1

GENERAL..................................................................................................................2-1

2.1.1

General Specifications .........................................................................................2-1

2.1.2

Paper Specifications.............................................................................................2-2

2.1.3

Printable Area ................................................................................................................ 2-3

2.2

SPECIFICATIONS LIST ............................................................................................2-4

CHAPTER 3

THEORY OF OPERATION

3.1

OVERVIEW................................................................................................................3-1

3.2

PRINTER SECTION ..................................................................................................3-2

3.2.1

Print System and Transfer System ......................................................................3-7

[ 1 ] Structure of the machine ......................................................................................3-8

[ 2 ] Basic structure of the printing system ..................................................................3-9

[ 3 ] Details of each process ......................................................................................3-11

3.2.2

Laser ASSY PU..................................................................................................3-21

3.2.3

Paper Transportation System.............................................................................3-22

3.2.4

Fusing Unit .........................................................................................................3-23

3.3

STRUCTURE OF THE CONTROL SYSTEM..........................................................3-25

3.3.1

Basic Structure ...................................................................................................3-25

[ 1 ] Electrical system and function............................................................................3-25

3.3.2

Control System ...................................................................................................3-32

[ 1 ] Control of the print process ................................................................................3-32

3.3.3

Main PCB (Video Controller PCB)......................................................................3-41

[ 1 ] Outline ................................................................................................................3-41

[ 2 ] Circuit .................................................................................................................3-41

3.4

SCANNER MECHANISM ........................................................................................3-45

iii

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