Required After Parts Replacement - Brother DCP-9040CN Service Manual

This service manual contains basic information required for after-sales service of the color
laser multi function center (hereinafter referred to as "the machine"). This information is
vital to the service personnel to maintain the high printing quality and performance of the
machine.
This service manual covers the DCP-9040CN/9042CDN/ MFC-9440CN/9450CDN machines.
This manual consists of the following chapters:
CHAPTER 1: TROUBLESHOOTING
Details of error messages and codes that the incorporated self-diagnostic functions of the
machine will display if any error or malfunction occurs. If any error message appears, refer
to this chapter to find which parts should be checked or replaced.
The latter half of this chapter provides sample problems that could occur in the main
sections of the machine and related troubleshooting procedures.
CHAPTER 2: PERIODICAL MAINTENANCE
Details of consumable parts and periodical maintenance parts. This chapter also covers
procedures for disassembling and assembling periodical maintenance parts.
CHAPTER 3: DISASSEMBLY AND ASSEMBLY
Details of procedures for disassembling and assembling the machine together with related
notes. The disassembly order flow provided enables you to see at a glance the quickest
way to get to parts involved.
At the start of a disassembly job, you can check the disassembly order flow that guides you
through a shortcut to get to the object parts.
This chapter also covers screw tightening torques and lubrication points to which the
specified lubrications should be applied during assembly of the machine.
CHAPTER 4: ADJUSTMENTS AND UPDATING OF SETTINGS,

REQUIRED AFTER PARTS REPLACEMENT

Details of adjustments and updates of settings, which are required if the main PCB and
some other parts of the machine have been replaced. This chapter also covers how to
update the firmware.
CHAPTER 5: SERVICE FUNCTIONS
Describes the maintenance mode which is exclusively designed for the purpose of
checking the settings and making any adjustments using the control panel.
This chapter also covers hidden function menus, which activate settings and functions or
reset the parts life.
CHAPTER 6: CIRCUIT DIAGRAMS, WIRING DIAGRAM
Provides Circuit Diagrams and Wiring Diagrams for the connections of the PCBs.
PREFACE
i
Confidential