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Make/Model Information:

  • Brand:   Brother
  • Models included:
    • Brother MFC-5440CN
    • Brother MFC-5840CN

File Information:

  • Type:   Factory Service Manual (FSM)
  • Language:   English
  • Number of pages:   407
  • File size:  ∼ 16.96 MB
  • File Format:   PDF only
  • SME Watermarks:   None
  • Password lock:   No
  • Edit/copy/modify:   Yes
  • SKU:   BMBR-1030

NOTE:  This list was created by program script and may not accurately represent the text from the source pages.   For full preview please click on 'Download sample':

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This manual is made up of nine chapters and appendices.
CHAPTER 1 PARTS NAMES AND FUNCTIONS
Contains external views and names of components and describes their functions. Information about
the keys on the control panel is included to help you check operation or make adjustments.
CHAPTER 2 SPECIFICATIONS
Lists the specifications of each model, which enables you to make a comparison of different models.
CHAPTER 3 THEORY OF OPERATION
Gives an overview of the scanning and printing mechanisms as well as the sensors, actuators, and
control electronics. It aids in understanding the basic principles of operation as well as locating
defects for troubleshooting.
CHAPTER 4 TRANSFER OF DATA LEFT IN THE MACHINE TO BE SENT FOR REPAIR
Describes how to transfer data left in the machine to be sent for repair. The service personnel should
instruct end users to follow the transfer procedure given in this chapter if the machine at the user site
cannot print received data due to the printing mechanism defective. End users can transfer received
data to another machine to prevent data loss.
CHAPTER 5 DISASSEMBLY/REASSEMBLY AND LUBRICATION
Details procedures for disassembling and reassembling the machine together with related notes. The
disassembly order flow provided enables you to see at a glance the quickest way to get to
component(s) involved.
At the start of a disassembly job, you check a disassembly order flow that guides you through a
shortcut to the object components.
This chapter also covers screw tightening torques and lubrication points to which the specified
lubricants should be applied during reassembly jobs.
CHAPTER 6 ADJUSTMENTS AND UPDATING OF SETTINGS REQUIRED AFTER PARTS
REPLACEMENT
Details adjustments and updating of settings, which are required if the head/carriage unit, main PCB
and some other parts have been replaced.
CHAPTER 7 CLEANING
Provides cleaning procedures not covered by the User's Manual. Before starting any repair work,
clean the machine as it may solve the problem concerned.
CHAPTER 8 MAINTENANCE MODE
Describes the maintenance mode which is exclusively designed for the purpose of checks, settings
and adjustments using the keys on the control panel.
In the maintenance mode, you can update memory (EEPROM: electrically erasable programmable
read-only memory) contents for optimizing the drive conditions of the head/carriage unit, paper feed
roller or paper ejection roller (if they have been replaced) or for setting the CIS scanner area, for
example. You can also customize the EEPROM according to the shipment destination of the
machine concerned. In addition, you can perform operational checks of the LCD, control panel PCB
or sensors, perform a print test, display the log information or error codes, and modify firmware
switches (WSW).
CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING
Details error messages and codes that the incorporated self-diagnostic functions display if any error
or malfunction occurs. If any error message appears, refer to this chapter to find which components
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. This will help service personnel pinpoint and repair
defective components.
Appendix 1 Serial Numbering System
Shows the location of serial number labels put on some parts and lists the coding information
pertaining to the serial numbers.
Appendix 2 Firmware Installation
Provides instructions on how to update firmware stored in the flash ROM on the main PCB or load
firmware to a new main PCB from the host PC.
No hardware replacement is required for updating.
Appendix 3 Customizing Codes According to Shipping Destination
Lists the customizing codes for the various preferences exclusively designed for each destination (e.g.
language). Those codes are stored in the memory (EEPROM) mounted on the main PCB. If the main
PCB is replaced with a new one, therefore, you will need to set the proper customizing codes with
the machine in the maintenance mode.
Appendix 4 Firmware Switches (WSW)
Describes the functions of the firmware switches, which can be divided into two groups: one is for
customizing preferences designed for the shipping destination (as described in Appendix 3) and the
other is for modifying preferences that match the machine to the environmental conditions. Use the
latter group if the machine malfunctions due to mismatching.
Appendix 5 Wiring Diagram
Provides the wiring diagram that helps you understand the connections between PCBs.
Appendix 6 Circuit Diagrams
Provides the circuit diagrams of the MJ PCB and power supply PCB.
This manual describes the models and their versions destined for major countries. The specifications and
functions are subject to change depending upon each destination.
CHAPTER 5 DISASSEMBLY/REASSEMBLY AND LUBRICATION
This chapter details procedures for disassembling and reassembling the machine together with
related notes. The disassembly order flow provided enables you to see at a glance the quickest
way to get to component(s) involved.
At the start of a disassembly job, you check the disassembly order flow that guides you through
a shortcut to the object components.
This chapter also covers screw tightening torques and lubrication points to which the specified
lubricants should be applied during reassembly jobs.
CONTENTS
5.1 DISASSEMBLY/REASSEMBLY
Safety Precautions
Tightening Torque
Preparation
How to Access the Object Component
Disassembly Flowchart
5.1.1 Draining the Ink from the Ink Tubes -- Be sure to perform draining before
removing the head/carriage unit, ink refill ASSY or engine unit. --
5.1.2 Jam Clear Cover
5.1.3 Scanner Cover (Scanner Unit) with ADF & Document Cover ASSY
5.1.4 ADF & Document Cover ASSY
5.1.5 Control Panel ASSY
5.1.6 Upper Cover
5.1.7 Head/Carriage Uni t
5.1.8 Ink Refill ASSY
5.1.9 Media Module Cover and Main PCB
5.1.10 LT Cover* and Side Covers (R and L)
5.1.11 MJ/PS Shield Box, MJ PCB and Power Supply PCB
5.1.12 Ink Absorber Box
5.1.13 Engine Unit and Maintenance Unit
5.1.14 Components on the Engine Unit
5.1.15 LT Chassis and LT Gear Holder ASSY (MFC5840CN)
5.1.16 Routing of the Harnesses and Flat Cables
5.2 LUBRICATION
5.1 DISASSEMBLY/REASSEMBLY
Safety Precautions
To prevent the creation of secondary problems by mishandling, observe the following precautions
during maintenance work.
(1) Before starting disassembly/reassembly jobs, unplug the power cord and telephone line.
In particular, when having access to the power supply inside the machine, make sure that the
power cord is unplugged from the electrical outlet; when having access to the main PCB or MJ
PCB, make sure that both the power cord and telephone line are unplugged from the machine.
(2) Be careful not to lose screws, washers, or other parts removed for parts replacement.
(3) When using soldering irons and other heat-generating tools, take care not to damage the resin
parts such as wires, PCBs, and covers.
(4) Static electricity charged in your body may damage electronic parts.
Before handling the PCBs, touch a metal portion of the machine to discharge static electricity
charged in your body. When transporting PCBs, be sure to wrap them in conductive sheets
such as aluminum foil.
When replacing the head/carriage unit, put on a grounding wrist band and perform the job on a
static mat. Also take care not to touch the conductor sections on the flat cables.
(5) Be sure to reinsert self-tapping screws correctly, if removed.
(6) Tighten screws to the torque values listed on the next page.
(7) When connecting or disconnecting cable connectors, hold the connector bodies not the wires. If
the connector has a lock, always slide the connector lock to unlock it.
(8) Before reassembly, apply the specified lubricant to the specified points. (Refer to Section 5.2 in
this chapter.)
(9) After repairs, check not only the repaired portion but also that the connectors and other related
portions function properly before operation checks.
(10) Once the head/carriage unit prints, it will start head locking operation after five seconds from
the end of printing. The head locking operation will take 5 to 10 seconds. NEVER unplug the
power cord before the machine completes the head locking operation; doing so will make the
head/carriage unit unusable and require replacement with a new head/carriage unit.
When you receive the machine from the user or when you pack it for sending it back to the
user, check the head locking state.
CHAPTER 9 ERROR INDICATION AND TROUBLESHOOTING
This chapter details error messages and codes that the incorporated self-diagnostic functions
display if any error or malfunction occurs. If any error message appears, refer to this chapter to
find which components 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. This will help service personnel pinpoint and
repair defective components.
CONTENTS
9.1 ERROR INDICATION
9.1.1 Equipment Errors
[ 1 ] Error messages appearing on the LCD
[ 2 ] Error codes contained in "MACHINE ERROR X X " messages
9.1.2 Communications Errors
9.2 TROUBLESHOOTING
9.2.1 Introduction
9.2.2 Precautions
9.2.3 Checking prior to Troubleshooting
9.2.4 Troubleshooting based on problem type
[ 1 ] Control panel problems
[ 2 ] Telephone problems
[ 3 ] Communications problems
[ 4 ] Paper/document feeding problems
[ 5 ] Print-image problems
[ 6 ] PC-driven printing problems
[ 7 ] Memory card driven printing (SmartMedia, Compact Flash,
Memory Stick, SD card, or XD)
[ 8 ] Others
9.2.5 Problems encountered frequently in the past
[ 1 ] Paper jams
[ 2 ] "MACHINE ERROR 41" error message
[ 3 ] Ink-related problems
[ 4 ] Auto document feeder (ADF) malfunction
9.2.6 Possible component defects and resulting problems
[ 1 ] ADF mechanism
[ 2 ] Scanner mechanism
[ 3 ] Head/carriage unit drive and purge mechanisms
[ 4 ] Print head mechanism
[ 5 ] ASF mechanism
[ 6 ] Paper feeding mechanism
[ 7 ] Speaker
[ 8 ] Control panel
[ 9 ] PCBs
[ 10 ] Adjustments/data in the memories
FACSIMILE EQUIPMENT
PARTS REFERENCE LIST
MODEL: MFC5440CN / 5840CN
(For Germany / United Kingdom / France /
Belgium / Netherlands / Switzerland /
Ireland / Austria / Spain / Italy / Portugal /
China / Hong Kong / Singapore / Gulf /
Oceania / Pan-Nordic / Euro Generic)
NOTES FOR USING THIS PARTS REFERENCE LIST
1. In the case of ordering parts, it needs mentioning the following items:
(1) Code
(2) Q' ty
(3) Description
(4) Recommend (The v mark is attached to recommend parts at this column.)
(5) Symbol (PCB No., Revision, and Parts location mounted on the PCB.)
Note: No orders without Parts Code or Tool No. can be accepted.
[Example]
(1) (2) (3) (4) (5)

REF.NO. CODE Q' TY DESCRIPTION RECOMMEND SYMBOL REMARKS

2. Design-changed parts:
When the parts are changed, any one of the following symbols is mentioned in the REMARKS column.
CHG (chg): The part is changed to a new part.
ADD (add): The part is newly added.
DEL (del): The part is deleted.
Symbol in capital letters indicates that the change is the latest one in the page.
3. The new models started their production, so we release
this parts reference list for the new machines. The old
and new model, however have the same names
although the parts inside are different. Therefore we
prepared the new rating label to help you distinguish the
difference between the new and the old model by
checking out if there is a Z or not. The difference is that
the new model can be determined by the character Z
written on the Rating Label affixed to the back of the product.
4. Parts change will be informed by the technical information.
COUNTRIES
GERMANY ----- GER SPAIN ---- SPA PAN NORDIC ---- PND
UNITED KINGDOM ----- UK ITALY ---- ITA EURO GENERIC ---- GNR
FRANCE ---- FRA PORTUGAL ---- POR
BELGIUM ---- BEL CHINA ---- CHN
NETHERLANDS ---- NLD HONG KONG ---- HK
SWITZERLAND ---- CHE SINGAPORE ---- SIN
IRELAND ---- IRE GULF ---- GUL
AUSTRIA ---- AUS OCEANIA (ARL & NZ) ---- OCE


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