Brother HL1240_1250_1270 service manual.PDF

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Brother Laser Printer
SERVICE MANUAL
MODEL: HL-1030/1240/1250/1270N
Read this manual thoroughly before maintenance work.
Keep this manual in a convenient place for quick and easy reference at all times.
September, 1999
SM-PRN001
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© Copyright Brother 1999
All rights reserved.
No part of this publication may be reproduced in any form or by any means without permission
in writing from the publisher.
Specifications are subject to change without notice.
Trademarks:
The brother logo is a registered trademark of Brother Industries, Ltd.
Apple, the Apple Logo, and Macintosh are trademarks, registered in the United States and
other countries, and True Type is a trademark of Apple computer, Inc.
Epson is a registered trademark and FX-80 and FX-850 are trademarks of Seiko Epson
Corporation.
Hewlett Packard is a registered trademark and HP Laser Jet is a trademark of Hewlett Packard
Company.
IBM, IBM PC and Proprinter are registered trademarks of International Business Machines
Corporation.
Microsoft and MS-DOS are registered trademarks of Microsoft Corporation.
Windows is a registered trademark of Microsoft Corporation in the U.S. and other countries.
PREFACE
PREFACE
This service manual contains basic information required for after-sales service of the laser
printer (hereinafter referred to as "this machine" or "the printer"). This information is vital to the
service technician to maintain the high printing quality and performance of the printer.
This service manual covers the HL-1030/1240/1250/1270N printers.
This manual consists of the following chapters:
CHAPTER 1:
GENERAL
Features, specifications, etc.
CHAPTER 2:
INSTALLATION AND BASIC OPERATION
Installation conditions, Installation procedures, basic operation of the printer
etc.
CHAPTER 3:
THEORY OF OPERATION
Basic operation of the mechanical system, the electrical system and the
electrical circuits and their timing information.
CHAPTER 4:
DISASSEMBLY AND RE-ASSEMBLY
Procedures for disassembling and re-assembling the mechanical system.
CHAPTER 5:
MAINTENANCE
Periodical replacements parts, consumable parts, etc.
CHAPTER 6:
TROUBLESHOOTING
Reference values and adjustments, troubleshooting image defects,
troubleshooting malfunctions, etc.
APPENDICES :
Serial No. descriptions, Drum life & page counter, Diameter / circumference
of rollers, Connection diagrams, PCB circuit diagrams, etc.
Information in this manual is subject to change due to improvement or redesign of the product.
All relevant information in such cases will be supplied in service information bulletins
(Technical Information).
A thorough understanding of this printer, based on information in this service manual and
service information bulletins, is required for maintaining its print quality performance and for
improving the practical ability to find the cause of problems.
i
TABLE OF CONTENTS
TABLE OF CONTENTS
CHAPTER 1
GENERAL...........................................................................1-1
1.
2.
3.
Printing..............................................................................................................................1-5
3.2
Functions ..........................................................................................................................1-6
3.3
Electrical and Mechanical .................................................................................................1-7
3.4
Network (for HL-1270N only) ............................................................................................1-8
3.5
Feedable paper................................................................................................................... 1-8
3.5.2
Paper cassette capacity.................................................................................................... 1-10
3.5.3
Print delivery ..................................................................................................................... 1-10
3.6
Effective printing area ....................................................................................................... 1-11
3.6.2
Print guaranteed area ....................................................................................................... 1-11
CHAPTER 2
INSTALLATION AND BASIC OPERATION.......................2-1
1.
Power Supply....................................................................................................................2-1
1.2
Environment......................................................................................................................2-1
1.3
2.
3.
For Windows ® Users .........................................................................................................2-3
For Windows ® Users with No CD-ROM Drive...................................................................2-5
3.2.1
3.2
Install the drum unit............................................................................................................. 2-5
3.2.2
Load paper.......................................................................................................................... 2-5
3.2.3
Print a test page.................................................................................................................. 2-5
3.2.4
Connect the printer and the computer ................................................................................ 2-6
3.2.5
Install the printer driver from floppy disk ............................................................................. 2-6
3.3
Using the USB Interface (for Windows ® 98 only) ..............................................................2-7
3.3.1
Connect the USB interface cable ........................................................................................ 2-7
3.3.2
Install the USB driver .......................................................................................................... 2-7
3.3.3
Set the PC printer port ........................................................................................................ 2-9
3.4
For Macintosh (iMac and Power Macintosh) with USB Users Only..................................2-9
4.
PAPER HANDLING ................................ ................................ ............................... 2-10
4.1
Load Paper into the Paper Cassette...............................................................................2-10
ii
TABLE OF CONTENTS
4.2
Load Paper Manually ......................................................................................................2-10
4.3
To print on both sides of the paper from the paper cassette ............................................ 2-11
4.3.2
To print on both sides of the paper from the manual feed slot.......................................... 2-12
5.
5.2
5.3
5.4
Alarm LED Indications ....................................................................................................2-14
5.5
5.6
Sleep mode ....................................................................................................................... 2-15
5.6.2
Test print mode ................................................................................................................. 2-16
6.
Preparing the BR-net Board............................................................................................2-17
6.1.1
Connect the Ethernet cable .............................................................................................. 2-17
6.1.2
Install the BRAdmin32: configuration utility (for Windows 95/98/NT 4.0 users only) ........ 2-17
6.1.3
Print configuration page .................................................................................................... 2-18
6.2
Functions ........................................................................................................................2-18
6.2.1
LED functions.................................................................................................................... 2-18
6.2.2
Factory default setting....................................................................................................... 2-18
CHAPTER 3
THEORY OF OPERATION .................................................3-1
1.
General Block Diagram.....................................................................................................3-1
1.2
Main PCB Block Diagram .................................................................................................3-4
1.3
Main PCB..........................................................................................................................3-7
1.3.1 ASIC.................................................................................................................................... 3-7
1.4
1.5
BR-net PCB (for HL-1270 only) ......................................................................................3-18
1.6
Low-voltage Power Supply ............................................................................................... 3-19
1.6.2
High-voltage Power Supply............................................................................................... 3-20
2.
Overview of Printing Mechanism ....................................................................................3-21
2.2
Paper supply ..................................................................................................................... 3-23
2.2.2
Paper registration.............................................................................................................. 3-23
iii

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