Brother MFC-J3720 Operating manual

1
How to use this guide: 1
1 Read the whole guide before using your machine and keep it for later reference.
2 Carefully follow the instructions set out in this guide and always ensure that you follow all
warnings and instructions marked on the product.
3 If you have concerns about how to use your machine after reading this guide, please contact
Brother customer service or your local Brother dealer.
4 To ensure you understand all of the instructions, study the Symbols and Conventions used in the
documentation.
Product Safety Guide 1
MFC-J3520/J3720/J6520DW/J6720DW/J6920DW
Brother Industries, Ltd.
15-1, Naeshiro-cho, Mizuho-ku, Nagoya 467-8561, Japan
Please read this booklet before attempting to operate the machine, or before attempting any
maintenance. Failure to follow these instructions may result in an increased risk of fire, electrical
shock, burns or suffocation. Brother shall not be liable for damage caused where the product
owner has failed to follow instructions set out in this guide.
Version 0
ARL/ASA/NZ/SAF

2
Symbols and conventions used in the
documentation 1
The following symbols and conventions are used throughout the documentation.
Follow all warnings and instructions marked on the machine.
NOTE
The illustrations in this guide show the
MFC-J6720DW.
WARNING
WARNING indicates a potentially
hazardous situation which, if not avoided,
could result in death or serious injuries.
CAUTION
CAUTION indicates a potentially hazardous
situation which, if not avoided, may result in
minor or moderate injuries.
IMPORTANT
IMPORTANT indicates a potentially
hazardous situation which, if not avoided,
may result in damage to property or loss of
product functionality.
NOTE
Notes tell you how to respond to a situation
that may arise or give tips about how the
operation works with other features.
Prohibition icons indicate actions
that must not be performed.
This icon indicates that flammable
sprays must not be used.
This icon indicates that organic
solvents such as alcohol and liquids
must not be used.
Electrical Hazard icons alert you to
possible electrical shocks.
Fire Hazard icons alert you to the
possibility of a fire.
Bold Bold typeface identifies the dial
pad numbers of the
Touchpanel and buttons on
your computer screen.
Italics Italicized typeface emphasizes
an important point or refers you
to a related topic.
Courier
New
Text in the Courier New font
identifies messages on the
LCD of the machine.

3
Compilation and Publication Notice 1
This manual has been compiled and published to provide the latest product safety information at
the time of publication. The information contained in this manual may be subject to change.
For the latest manual, please visit us at http://solutions.brother.com/.
Choose a safe location for your machine 1
Put your machine on a flat, stable surface that is free from shocks and vibrations, such as a desk.
Put the machine near a telephone socket and a standard grounded electrical socket or a standard
electrical socket (for Taiwan). Choose a dry, well ventilated location where the temperature
remains between 10 C and 35 C.
WARNING
DO NOT expose the machine to direct sunlight, excessive heat, open flames, corrosive gasses,
moisture or dust. DO NOT place your machine on a carpet or rug as this will expose it to dust.
Doing so may create a risk of an electrical short or fire. It may also damage the machine and/or
render it inoperable.
DO NOT place the machine near heaters, air conditioners, water, chemicals or devices that
contain magnets or generate magnetic fields. Doing so may create the risk of a short circuit or
fire should water come into contact with the machine (including condensation caused by heating
systems or air conditioning and ventilation equipment).

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DO NOT place the product near chemicals or in a place where chemical spillage could occur. In
particular, organic solvents or liquids may cause the casing and/or cables to melt or dissolve,
risking fire or electric shock. They may also cause the product to malfunction or become
discoloured.
Slots and openings in the casing, back or bottom of the product are provided for ventilation. The
product should be placed so as not to come into contact with any wall or other device so these
openings are not blocked or covered. Blocking the machine’s ventilation could create a risk of
overheating and/or fire.
IMPORTANT
• Always place the machine on a solid surface, never on a bed, sofa, rug, or similar soft
surfaces.
• Do not place this machine in a “built-in” installation.
IMPORTANT
• DO NOT put objects on top of the machine.
• DO NOT place anything in front of the machine that will block printouts. DO NOT place
anything in the path of received faxes.
• DO NOT place your machine next to sources of interference, such as speakers or the base
units of non-Brother cordless telephones. Doing so may interfere with the operation of the
machine’s electronic components.
• DO NOT place the machine on any tilted/slanted surface. DO NOT tip the machine after the
ink cartridges are installed. Doing so may cause ink spillage and internal damage to the
machine.

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General precautions 1
WARNING
Plastic bags are used in the packing of your machine. To avoid danger of suffocation, keep
these plastic bags away from babies and children. Plastic bags are not toys.
For users with pacemakers
This machine generates a weak magnetic field. If you experience any unusual symptoms with your
pacemaker while near the machine, move away from the machine and consult a doctor immediately.
Avoid using this machine during an electrical storm. There may be a remote risk of electric shock
from lightning.
DO NOT use flammable substances, any type of spray, or an organic solvent/liquid that contains
alcohol or ammonia to clean the inside or outside of the machine. Doing this may cause a fire
or electrical shock.
CAUTION
Do not try and pick up pages until they have finished printing and are ejected from the machine.
Doing this may cause you injury by trapping your fingers in the rollers.
If the tray has been extended to hold large paper such as A3, Legal or Ledger size paper,
position the machine so that the tray does not protrude past the edge of the table or desk. If
someone hits the tray, the machine could fall and cause injury.

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Some areas of the machine can cause injury if covers (shaded) are closed with force. Take care
when placing your hand in the areas shown in the illustrations.
When adjusting the tray size from A3, Legal or Ledger to the original size, take care not to pinch
your fingers in the gaps or slots at the bottom of the tray to avoid injury.

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DO NOT touch the area shaded in the illustration. Doing so may cause injury to your fingers by
cutting them on the edge of the machine.
(MFC-J3720, MFC-J6720DW and MFC-J6920DW only)
To prevent injuries when moving or lifting this machine, make sure to use at least two people.
Be careful not to pinch your fingers when you set the machine back down.
DO NOT carry the machine by holding the lower tray when it is installed. The lower tray could
fall and cause injury to you.

8
DO NOT carry the machine by holding the scanner cover, the Jam Clear Cover, manual feed
slot cover or control panel. Doing so may cause the machine to slip out of your hands.
Carry the machine by sliding your hands into the handhold indentations located on each side of
the machine.
(MFC-J3520 and MFC-J6520DW)

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When carrying the machine, remove the tray if it has been extended to hold large paper such as
A3, Legal or ledger size paper. The weight of the paper could cause the tray to fall and cause
injury to you.
Do not remove the serial number and instruction labels that are affixed to the machine.
IMPORTANT
Disruption of power can wipe out information in the machine’s memory.
(MFC-J3520 and MFC-J6520DW)

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Connecting the machine safely 1
WARNING
There are high-voltage electrodes inside the machine. Before you access the inside of the
machine, including for routine maintenance such as cleaning, make sure you have unplugged
the power cord from the electrical socket as well as any telephone (RJ-11) or Ethernet cables
from the machine.
(This illustration is an example for Australia.)
DO NOT handle the plug with wet hands. Doing so may cause an electrical shock.
(This illustration is an example for Australia.)
Always make sure the plug is fully inserted.
This machine should be connected to an adjacent grounded AC power source within the range
indicated on the rating label. DO NOT connect it to a DC power source or inverter. Doing so may
cause an electrical shock. If you are not sure what kind of power source you have, contact a
qualified electrician.