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PREFACE, Operation and Timing - printer

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PREFACE This Service Manual contains basic information required for after-sales service of the LBP-2460 laser beam printer (hereinafter referred to as the "printer"). This information is vital to the service technician in maintaining the high print quality and performance of the printer. The 2,000-sheet paper deck, option controller, envelope feeder, and duplexing unit, which are prepared for the printer as options, are also described in this manual. In this manual, the optional 2,000-sheet paper deck is simply called the paper deck. This manual consists of the following chapters: Chapter 1: Product information Features, specifications, operation, 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, reference values and adjustments, troubleshooting procedures, lubricants, and solvents Appendix: General timing chart, general circuit diagram, etc. 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 printer, based on information in this Manual and Service Information Bulletins, is required for maintaining its performance and for locating and repairing the causes of malfunctions.

Section	Page
PREFACE	5
CONTENTS	7
CHAPTER 1	11
I. FEATURES	13
II. SPECIFICATIONS	15
III. SAFETY INFORMATION	19
IV. PARTS OF THE PRINTER	20
V. INSTALLATION	26
VI. MAINTENANCE AND SERVICING BY THE CUSTOMER	35
VII. OPERATION	37
CHAPTER 2	45
I. BASIC OPERATION	47
II. ENGINE CONTROL SYSTEM	50
III. LASER/SCANNER SYSTEM	72
IV. IMAGE FORMATION SYSTEM	78
V. PICK-UP/FEED SYSTEM	88
VI. OVERALL CONTROL SYSTEM	106
VII. OPTION CONTROL SYSTEM	110
VIII. ENVELOPE FEEDER	113
IX. DUPLEXING UNIT	117
X. PAPER DECK	127
CHAPTER 3	141
I. EXTERNALS	143
II. DRIVE SYSTEM	152
III. PAPER TRANSPORT SYSTEM	154
IV. EXPOSURE SYSTEM	163
V. ELECTROSTATIC IMAGING/DEVELOPING/CLEANING SYSTEM	164
VI. FIXING SYSTEM	166
VII. ELECTRONIC COMPONENTS	174
VIII. ENVELOPE FEEDER	181
IX. DUPLEXING UNIT	187
X. OPTION CONTROLLER	194
XI. PAPERDECK	195
CHAPTER 4	213
I. MAINTENANCE AND SERVICING	215
II. TOOLS	219
III. MEASUREMENT AND ADJUSTMENT	228
IV. INITIAL CHECK	232
V. IMAGE DEFECTS	233
VI. MALFUNCTION TROUBLESHOOTING	242
VII. PAPER FEEDING TROUBLESHOOTING	265
VIII. LOCATION OF ELECTRICAL PARTS/FUNCTION	272
IX.VARIABLE RESISTORS, LEDS, TEST PINS, JUMPERS, AND SWITCHES ON PC BOARDS	287
X. LIST OF LUBRICANTS, CLEANERS	296
APPENDIX	297
I. GENERAL TIMING CHART-1/2	299
GENERAL TIMING CHART-2/2	300
II. GENERAL CIRCUIT DIAGRAM-1/3	301
GENERAL CIRCUIT DIAGRAM-2/3	302
GENERAL CIRCUIT DIAGRAM-3/3	303

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PREFACE

This Service Manual contains basic information required for after-sales service of the LBP-2460

laser beam printer (hereinafter referred to as the "printer").

This information is vital to the

service technician in maintaining the high print quality and performance of the printer.

The 2,000-sheet paper deck, option controller, envelope feeder, and duplexing unit, which are

prepared for the printer as options, are also described in this manual.

In this manual, the optional 2,000-sheet paper deck is simply called the paper deck.

This manual consists of the following chapters:

Chapter 1:

Product information

Features, specifications, operation, 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, reference values and adjustments, troubleshooting

procedures, lubricants, and solvents

Appendix:

General timing chart, general circuit diagram, etc.

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 printer, based on information in this Manual and Service

Information Bulletins, is required for maintaining its performance and for locating and repairing

the causes of malfunctions.