Brother HL-4000CN Service Manual page 3

This service manual contains basic information required for after-sales service of the color laser
printer (here-in-after 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-4000CN color laser printer.
This manual consists of the following chapters:
CHAPTER I : SPECIFICATIONS
Specifications, etc.
CHAPTER II : INSTALLATION
Installation conditions and installation procedures.
CHAPTER III : STRUCTURE OF SYSTEM COMPONENTS
Basic operation of the mechanical system, the electrical system and the electrical
circuits and their timing information.
CHAPTER IV : ASSEMBLY / DISASSEMBLY
Procedures for replacement of the mechanical system parts.
CHAPTER V : TROUBLESHOOTING
Description of error messages on the control panel, troubleshooting image
failure, etc.
CHAPTER VI : DIAGRAMS
CHAPTER VII : PLUG / JACK (P/J) CONNECTOR LOCATIONS
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 print quality performance and for improving the
practical ability to find the cause of problems.
PREFACE