Brother HL-720 - B/W Laser Printer Service Manual page 95

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 the HL-760 printer.
This manual consists of the following chapters:
CHAPTER I: FEATURES AND SPECIFICATIONS
Features, specifications, etc.
CHAPTER II: THEORY OF OPERATION
Basic operation of the mechanical system, the electrical system and the electrical
circuit, and their timing.
CHAPTER III: DISASSEMBLY AND REASSEMBLY
Procedures of disassembling and reassembling the mechanical system.
CHAPTER IV: TROUBLESHOOTING
Reference values and adjustments, troubleshooting for image defects,
troubleshooting for malfunctions, etc.
APPENDICES: Connection diagrams, PCB circuit diagrams.
Note: This service manual ffor the HL-760 describes only the changesin each part of the HL-
720/730 (84U002BE0) service manual which was published previously. Parts in common with
those in the HL-720/730 service manual are omitted, this is indicated in the Table of
Contents.. When you require to refer to the parts omitted in this manual, please refer to the
service manual of that model.
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.
PREFACE