4PSR-E323/YPT-320 Owner’s Manual
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:
•Only use the voltage specified as correct for the instrument. The required voltage
is printed on the name plate of the instrument.
•Use the specified adaptor (PA-130 or an equivalent recommended by Yamaha)
only. Using the wrong adaptor can result in damage to the instrument or
overheating.
•Check the electric plug periodically and remove any dirt or dust which may have
accumulated on it.
•Do not place the AC adaptor 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.
•Do not open the instrument or attempt to disassemble the internal parts or modify
them in any way. The instrument contains no user-serviceable parts. If it should
appear to be malfunctioning, discontinue use immediately and have it inspected
by qualified Yamaha service personnel.
•Do not expose the instrument to rain, use it near water or in damp or wet
conditions, or place containers on it containing liquids which might spill into any
openings. If any liquid such as water seeps into the instrument, turn off the power
immediately and unplug the power cord from the AC outlet. Then have the
instrument 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.
•If the AC adaptor cord or plug becomes frayed or damaged, or if there is a sudden
loss of sound during use of the instrument, or if any unusual smells or smoke
should appear to be caused by it, immediately turn off the power switch,
disconnect the adaptor plug from the outlet, and have the instrument 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 instrument or other property. These precautions include, but are not limited to, the following:
•When removing the electric plug from the instrument or an outlet, always hold the
plug itself and not the cord.
•Unplug the AC power adaptor when not using the instrument, or during electrical
storms.
•Do not connect the instrument to an electrical outlet using a multiple-connector.
Doing so can result in lower sound quality, or possibly cause overheating in the
outlet.
•Always make sure all batteries are inserted in conformity with the +/- polarity
markings. Failure to do so might result in overheating, fire, or battery fluid
leakage.
•Always replace all batteries at the same time. Do not use new batteries together
with old ones. Also, do not mix battery types, such as alkaline batteries with
manganese batteries, or batteries from different makers, or different types of
batteries from the same maker, since this can cause overheating, fire, or battery
fluid leakage.
•Do not dispose of batteries in fire.
•Do not attempt to recharge batteries that are not intended to be charged.
•When the batteries run out, or if the instrument is not to be used for a long time,
remove the batteries from the instrument to prevent possible leakage of the battery
fluid.
•Keep batteries away from children.
•If the batteries do leak, avoid contact with the leaked fluid. If the battery fluid
should come in contact with your eyes, mouth, or skin, wash immediately with
water and consult a doctor. Battery fluid is corrosive and may possibly cause loss
of sight or chemical burns.
•Do not expose the instrument to excessive dust or vibrations, or extreme cold or
heat (such as in direct sunlight, near a heater, or in a car during the day) to prevent
the possibility of panel disfiguration or damage to the internal components.
•Do not use the instrument in the vicinity of a TV, radio, stereo equipment, mobile
phone, or other electric devices. Otherwise, the instrument, TV, or radio may
generate noise.
•Do not place the instrument in an unstable position where it might accidentally fall
over.
•Before moving the instrument, remove all connected adaptor and other cables.
•When setting up the product, 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.
•Use only the stand specified for the instrument. When attaching the stand or rack,
use the provided screws only. Failure to do so could cause damage to the internal
components or result in the instrument falling over.
•Before connecting the instrument to other electronic components, turn off the
power for all components. Before turning the power on or off for all components,
set all volume levels to minimum. Also, be sure to set the volumes of all
components at their minimum levels and gradually raise the volume controls while
playing the instrument to set the desired listening level.
•When cleaning the instrument, use a soft, dry cloth. Do not use paint thinners,
solvents, cleaning fluids, or chemical-impregnated wiping cloths.
Power supply/AC power adaptorDo not openWater warningFire warningIf you notice any abnormalityPower supply/AC power adaptorBatteryLocationConnectionsMaintenance
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