File name 700sm.pdfR
LASER PRINTER
SERVICE MANUAL
MODEL:HL-720/730/730Plus
© Copyright Brother 1996 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 II, IIP, and IID are trademarks of HewlettPackard 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
This service manual contains basic information required for after-sales service of the laser printer (here-after referred to as "this machine" or "the printer"). This information is vital to the service technical in maintaining the high print quality and performance of the printer. This service manual covers both HL-720 and HL-730/730Plus. This manual consists of the following chapters: CHAPTER I: FEATURES AND SPECIFICATIONS Features, specifications, etc. THEORY OF OPERATION Basic operation of the mechanical system, the electrical system and the electrical circuit, and their timing. DISASSEMBLY AND REASSEMBLY Procedures of disassembling and reassembling the mechanical system. TROUBLESHOOTING Reference values and adjustments, troubleshooting for image defects, troubleshooting for malfunctions, etc. Connection diagrams, PCB circuit diagrams.
CHAPTER II:
CHAPTER III:
CHAPTER IV:
APPENDICES:
Note:
There are each captions for HL-720 and HL-730/730Plus to divide this manual according to the contents. You can fin the captions under the headings. Please pay attention to them On the other hand, the headings have no captions that means the contents are common to HL720 and HL-730/730Plus.
Information in this manual is subject to change due to improvement or re-design 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 quality performance and for fostering the practical ability to find the cause of problems.
CONTENTS
CHAPTER I FEATURES AND SPECIFICATIONS... I-1
1. SYSTEM REQUIREMENTS... ... ... I-1 2. FEATURES ... ... ... |