Please read this guide before attempting to operate the product, or before attempting any
maintenance. Failure to follow these instructions may result in an increased risk of personal injury
or damage to property, including through fire, electrical shock, burns or suffocation. Brother shall
not be liable for damage caused where the product owner has failed to follow the instructions set
out in this guide.
Read all of the instructions. Save them for later reference.
Symbols and conventions
used in the documentationA
The following symbols and conventions are
used throughout the documentation.
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 you should respond to a
situation that may arise or give tips about how
the operation works with other features.
Electrical Hazard icons alert you to
possible electrical shocks.
Fire Hazard icons alert you to the
possibility of a fire.
Hot Surface icons warn you not to
touch product parts that are hot.
Prohibition icons indicate actions
that must not be performed.
BoldBold typeface identifies specific
keys on the product’s control
panel or on the computer
screen.
ItalicsItalicized typeface emphasizes
an important point or refers you
to a related topic.
Courier
New
Follow all warnings and instructions marked
on the product.
• Not all models are available in all
countries.
• The illustrations in this guide show the
HL-3170CDW and MFC-9340CDW.
Please go to the Brother Solutions Center at
http://solutions.brother.com/
Manuals on your model page to download the
other manuals.
Text in Courier New font
identifies messages on the
LCD of the product.
and click
Version B
USA/CAN
1
Compilation and PublicationA
WARNING
Under the supervision of Brother Industries, Ltd., this manual has been compiled and published,
covering the latest product descriptions and specifications.
The contents of this manual and the specifications of this product are subject to change without
notice.
Brother reserves the right to make changes without notice in the specifications and materials
contained herein and shall not be responsible for any damages (including consequential) caused
by reliance on the materials presented, including but not limited to typographical and other errors
relating to the publication.
Choosing a locationA
Put your product on a flat, level, stable surface free from vibration and shocks, such as a desk.
Put the product near a telephone wall jack (MFC only) and a standard grounded AC power outlet.
Choose a location where the temperature remains between 50F and 90.5F (10C and 32.5C)
and the humidity is between 20% to 80% (without condensation).
DO NOT expose the product to direct sunlight, excessive heat, open flames, corrosive gasses,
moisture or dust. Doing so may create a risk of an electrical shock, short circuit or fire. It may
also damage the product and/or render it inoperable.
DO NOT place the product near heaters, air conditioners, electrical fans, refrigerators, or water.
Doing so may create the risk of an electrical shock, short circuit or fire, as water may come into
contact with the product (including condensation caused by heating/air conditioning/ventilation
equipment).
2
DO NOT place the product near chemicals or in a place where chemicals could be spilled on it.
Should chemicals come into contact with the product, there may be a risk of fire or electric
shock. In particular, organic solvents or liquids such as benzene, paint thinner, polish remover,
or deodorizer may melt or dissolve the plastic cover and/or cables, resulting in a risk of fire or
electric shock. These or other chemicals may also cause the product to malfunction or become
discolored.
DO NOT put the product in a location that blocks or obstructs any slot or opening in the product.
These slots and openings are provided for ventilation. Blocking the product’s ventilation could
create a risk of overheating and/or fire.
Instead:
• Keep a gap of at least 6 in. (150 mm) between the ventilation hole and the wall.
• Place the product on a solid level surface.
• DO NOT place this product near or over a radiator or heater.
• DO NOT place this product in a “built-in” installation unless adequate ventilation is provided.
DO install your product near an AC power outlet that is easily accessible. In the event of an
emergency, easy access to the plug and outlet will allow you to shut off power to the product
quickly and completely.
Plastic bags are used in the packing of your product. Plastic bags are not toys. To avoid the
danger of suffocation, keep these bags away from babies and children and dispose of them
properly.
3
CAUTION
IMPORTANT
Avoid placing your product in a busy area. If you must place it in a busy area, ensure that the
product is in a safe location where it cannot be accidentally knocked over, which could cause
injury to you or others and serious damage to the product. Also ensure that cords are secured
so as not to pose a tripping hazard.
DO NOT eat the silica gel pack, please throw it away. If ingested seek medical attention
immediately.
DO NOT place heavy objects on the product.
DO NOT place this product on an unstable cart, stand, or table, particularly if children are
expected to be near the product. The product is heavy and may fall, causing injury to you or
others and serious damage to the product. For MFC and DCP products, there is an added risk
of injury if the scanner glass should break.
• DO NOT put objects on top of the product. Doing so could increase the risk of overheating
should the product malfunction.
• DO NOT place your product next to devices that contain magnets or generate magnetic fields.
Doing so may interfere with the operation of the product, causing print quality problems.
• DO NOT place your product 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 product's
electronic components.
• DO NOT connect your product to an AC power outlet controlled by wall switches or automatic
timers. Disruption of power can delete information from the product's memory.
• DO NOT connect your product to an AC power outlet on the same circuit as large appliances
or other equipment that requires a significant amount of electricity to operate. Operating this
product in conjunction with the other product(s) could create an overvoltage, tripping your
circuit breaker or blowing your fuse.
4
To use the product safelyA
WARNING
Please keep these instructions for later reference and read them before attempting any
maintenance. If you do not follow these safety instructions, there is a possibility of a fire, electrical
shock, burn or suffocation.
ELECTRICAL HAZARDS
Failure to follow the warnings in this section may create the risk of an electrical shock. In
addition, you could create an electrical short, which may create the risk of a fire.
There are high voltage electrodes inside the product. Before you access the inside of the
product, including for routine maintenance such as cleaning, make sure you have unplugged the
telephone line cord first (MFC only) and then the power cord from the AC power outlet, as well
as any telephone (RJ-11) (MFC only) or Ethernet (RJ-45) cables (Network models only) from
the product. Never push objects of any kind into this product through cabinet slots, since they
may touch dangerous voltage points or short out parts.
DO NOT handle the plug with wet hands.
Always make sure the plug is fully inserted. DO NOT use the product or handle the cord if the
cord has become worn or frayed.
DO NOT use this product during an electrical storm.
5
DO NOT allow this product to come into contact with water. This product should not be used
around standing water, including a bath tub, sink, or swimming pool; around appliances
containing water, including a refrigerator; or in a wet basement.
This product should be connected to an AC power source within the range indicated on the
rating label. DO NOT connect it to a DC power source or inverter. If you are not sure what kind
of power source you have, contact a qualified electrician.
Power Cord Safety:
• This product is equipped with a 3-wire grounded plug. This plug will only fit into a grounded
power outlet. This is a safety feature. If you are unable to insert the plug into the outlet, call
your electrician to replace your obsolete outlet. DO NOT attempt to defeat the purpose of the
grounded plug.
• Only use the power cord supplied with this product.
• This product should be positioned so that nothing pinches or constricts the power cord. DO
NOT allow anything to rest on the power cord. DO NOT place this product where people may
step on the cord. DO NOT place this product in a position where the cord is stretched or
where strain is otherwise put on the cord. Doing so may cause the cord to become worn or
frayed.
• Brother strongly recommends that you DO NOT use any type of extension cord.
(MFC only)
Use caution when installing or modifying telephone lines. Never touch telephone wires or
terminals that are not insulated unless the telephone line has been unplugged from the wall jack.
Never install telephone wiring during a lightning storm. Never install a telephone wall jack in a
location that is wet or may become wet, for example, near a refrigerator or other appliance that
produces condensation.
6
• DO NOT put a toner cartridge, a toner cartridge and drum unit assembly, or a waste toner
box into a fire. It could explode, resulting in injuries.
• DO NOT use flammable substances, any type of spray, or an organic solvent/liquid
containing alcohol or ammonia to clean the inside or outside of the product. Doing so could
cause a fire or electrical shock. Instead, use only a dry, lint-free cloth. For instructions on how
to clean the product, see User's Guide/Basic User's Guide: Routine Maintenance.
DO NOT attempt to operate this product when a paper jam or stray pieces of paper are inside
the product. Prolonged contact of paper with the fuser unit could cause a fire.
DO NOT use a vacuum cleaner to clean up scattered toner. Doing this might cause the toner
dust to ignite inside the vacuum cleaner, potentially starting a fire. Please carefully clean the
toner dust with a dry, lint-free soft cloth and dispose of it according to local regulations.
7
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