XMV4280/XMV4140 Owner’s Manual
4

PRECAUTIONS

PLEASE READ CAREFULLY BEFORE PROCEEDING

* Please keep this manual in a safe place for future reference.

WARNING

Always follow the basic precautions listed below to avoid the possibility of serious injury or even death from
electrical shock, short-circuiting, damages, fire or other hazards. These precautions include, but are not limited
to, the following:
• Do not place the power cord near heat sources such as heaters or radiators,
and do not excessively bend or otherwise damage the cord, place heavy
objects on it, or place it in a position where anyone could walk on, trip over,
or roll anything over it.
• Only use the voltage specified as correct for the device. The required voltage
is printed on the name plate of the device.
• Use only the supplied power cord/plug.
If you intend to use the device in an area other than in the one you
purchased, the included power cord may not be compatible. Please check
with your Yamaha dealer.
• Check the electric plug periodically and remove any dirt or dust which may
have accumulated on it.
• Be sure to connect to an appropriate outlet with a protective grounding
connection. Improper grounding can result in electrical shock.
• This device contains no user-serviceable parts. Do not open the device or
attempt to disassemble the internal parts or modify them in any way. If it
should appear to be malfunctioning, discontinue use immediately and have
it inspected by qualified Yamaha service personnel.
• Do not expose the device to rain, use it near water or in damp or wet
conditions, or place on it any containers (such as vases, bottles or glasses)
containing liquids which might spill into any openings. If any liquid such as
water seeps into the device, turn off the power immediately and unplug the
power cord from the AC outlet. Then have the device inspected by qualified
Yamaha service personnel.
• Never insert or remove an electric plug with wet hands.
• Do not put burning items, such as candles, on the unit. A burning item may
fall over and cause a fire.
• When one of the following problems occur, immediately turn off the power
switch and disconnect the electric plug from the outlet. Then have the device
inspected by Yamaha service personnel.
- The power cord or plug becomes frayed or damaged.
- It emits unusual smells or smoke.
- Some object has been dropped into the instrument.
- There is a sudden loss of sound during use of the device.
• If this device should be dropped or damaged, immediately turn off the power
switch, disconnect the electric plug from the outlet, and have the device
inspected by qualified Yamaha service personnel.

CAUTION

Always follow the basic precautions listed below to avoid the possibility of physical injury to you or others, or
damage to the device or other property. These precautions include, but are not limited to, the following:
• When removing the electric plug from the device or an outlet, always hold
the plug itself and not the cord. Pulling by the cord can damage it.
• Remove the electric plug from the outlet when the device is not to be used
for extended periods of time, or during electrical storms.
• Do not place the device in an unstable position where it might accidentally
fall over.
• Do not block the vents. This device has ventilation holes at the front/rear/
side to prevent the internal temperature from becoming too high. In
particular, do not place the device on its side or upside down. Inadequate
ventilation can result in overheating, possibly causing damage to the
device(s), or even fire.
• Do not use the device in a confined, poorly-ventilated location. If this device
is to be used in a small space other than an EIA-standard rack, make sure
that there is adequate space between the device and surrounding walls or
other devices: at least 10 cm at the sides, 10 cm behind and 40 cm above.
Inadequate ventilation can result in overheating, possibly causing damage to
the device(s), or even fire.
• Do not place the device in a location where it may come into contact with
corrosive gases or salt air. Doing so may result in malfunction.
• Before moving the device, remove all connected cables.
• When setting up the device, make sure that the AC outlet you are using is
easily accessible. If some trouble or malfunction occurs, immediately turn
off the power switch and disconnect the plug from the outlet. Even when the
power switch is turned off, electricity is still flowing to the product at the
minimum level. When you are not using the product for a long time, make
sure to unplug the power cord from the wall AC outlet.
• If the device is mounted in an EIA standard rack, carefully read the section
“Precautions for Rack Mounting” on page 7. Inadequate ventilation can
result in overheating, possibly causing damage to the device(s),
malfunction, or even fire.
• Before connecting the device to other devices, turn off the power for all
devices. Before turning the power on or off for all devices, set all volume
levels to minimum.
• Use only speaker cables for connecting speakers to the speaker connectors.
Use of other types of cables may result in fire.
• Remove the power plug from the AC outlet when cleaning the device.
Power supply/Power cord
Do not open
Water warning
Fire warning
If you notice any abnormality
Power supply/Power cord
Location
Connections
Maintenance
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