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Do not use this unit within 22 cm (9 inches) of persons with a

heart pacemaker implant or defibrillator implant.

WARNING

TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK,

DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.

As long as this unit is connected to the AC wall outlet, it is not

disconnected from the AC power source even if you turn off

this unit by . In this state, this unit is designed to consume a

very small quantity of power.

(Power key)

Turns on the power of this unit or sets it to the standby mode.

FOR YAS-CU201

• To assure the finest performance, please read this manual

carefully. Keep it in a safe place for future reference.

• Install this unit in a well ventilated, cool, dry, clean place

- away from direct sunlight, heat sources, vibration, dust,

moisture, and/or cold. For proper ventilation, allow the

following minimum clearances.

Top: 5 cm (2 in), Rear: 5 cm (2 in), Sides: 1 cm (3/8 in)
• Locate this unit away from other electrical appliances, motors,

or transformers to avoid humming sounds.

• Do not expose this unit to sudden temperature changes from

cold to hot, and do not locate this unit in an environment

with high humidity (i.e. a room with a humidifier) to prevent

condensation inside this unit, which may cause an electrical

shock, fire, damage to this unit, and/or personal injury.

• Avoid installing this unit where foreign objects may fall onto

this unit and/or this unit may be exposed to liquid dripping or

splashing. On the top of this unit, do not place:
– Other components, as they may cause damage and/or

discoloration on the surface of this unit.

– Burning objects (i.e. candles), as they may cause fire,

damage to this unit, and/or personal injury.

– Containers with liquid in them, as they may fall and liquid

may cause electrical shock to the user and/or damage to this

unit.

• Do not cover this unit with a newspaper, tablecloth, curtain,

etc. in order not to obstruct heat radiation. If the temperature

inside this unit rises, it may cause fire, damage to this unit,

and/or personal injury.

• Do not plug in this unit to a wall outlet until all connections

are complete.

• Do not operate this unit upside-down. It may overheat,

possibly causing damage.

• Do not use force on switches, knobs and/or cords.
• When disconnecting the power cable from the wall outlet,

grasp the plug; do not pull the cable.

• Do not clean this unit with chemical solvents; this might

damage the finish. Use a clean, dry cloth.

• Only voltage specified on this unit must be used. Using this

unit with a higher voltage than specified is dangerous and may

cause fire, damage to this unit, and/or personal injury. Yamaha

will not be held responsible for any damage resulting from use

of this unit with a voltage other than specified.

• To prevent damage by lightning, keep the power cable and

outdoor antennas disconnected from a wall outlet or the unit

during a lightning storm.

• Do not attempt to modify or fix this unit. Contact qualified

Yamaha service personnel when any service is needed. The

cabinet should never be opened for any reasons.

• When not planning to use this unit for long periods of time (i.e.

vacation), disconnect the AC power plug from the wall outlet.

• Be sure to read the “Troubleshooting” section on common

operating errors before concluding that this unit is faulty.

• Before moving this unit, press to set this unit in standby

mode, and disconnect the power supply cable from the wall

outlet.

• Condensation will form when the surrounding temperature

changes suddenly. Disconnect the power supply cable from the

outlet, then leave the unit alone.

• Install this unit near the wall outlet and where the AC power

plug can be reached easily.

• The batteries shall not be exposed to excessive heat such as

sunshine, fire or like.

• Secure placement or installation is the owner’s responsibility.

Yamaha shall not be liable for any accident caused by

improper placement or installation of speakers.

FOR NS-WSW40

• To assure the finest performance, please read this manual

carefully. Keep it in a safe place for future reference.

• Install this unit in a cool, dry, clean place - away from

windows, heat sources, sources of excessive vibration, dust,

moisture and cold. Avoid sources of humming (transformers,

motors). To prevent fire or electrical shock, do not expose this

unit to rain or water.

• The voltage to be used must be the same as that specified

on the rear panel. Using this unit with a higher voltage than

specified is dangerous and may cause a fire and/or electric

shock.

• Do not use force on switches, controls or connection wires.

When moving the unit, first disconnect the power plug and

the wires connected to other equipment. Never pull the wires

themselves.

• When not planning to use this unit for a long period (ie.,

vacation, etc.), disconnect the AC power plug from the wall

outlet.

• To prevent lightning damage, disconnect the AC power plug

when there is an electric storm.

• Since this unit has a built-in power amplifier, heat will radiate

from the rear panel. Place the unit apart from the walls,

allowing at least 20 cm of space above, behind and on both

sides of the unit to prevent fire or damage.

Furthermore, do not position with the rear panel facing down

on the floor or other surfaces.

• Do not cover the rear panel of this unit with a newspaper,

a tablecloth, a curtain, etc., in order not to obstruct heat

radiation. If the temperature inside the unit rises, it may cause

fire, damage to the unit and/or personal injury.

• Do not place the following objects on this unit:

– Glass, china, small metallic, etc.
If glass, etc., falls as a result of vibrations and breaks, it may

cause bodily injury.

– A burning candle etc.
If the candle falls as a result of vibration, it may cause fire

and bodily injury.

– A vessel containing water
If the vessel falls as a result of vibration and water spills,

it may cause damage to the speaker, and/or you may get an

electric shock.

• Do not place this unit where foreign material, such as dripping

water. It might cause fire, damage to this unit, and/or personal

injury.

• Never put a hand or a foreign object into the YST port located

on the right side of this unit. When moving this unit, do not

hold the port, as it might cause personal injury and/or damage

to this unit.

• Never place a fragile object near the YST port of this unit. If

the object falls or drops as a result of the air pressure, it may

cause damage to the unit and/or personal injury.

• Never open the cabinet. It might cause an electric shock, since

this unit uses a high voltage. It might also cause personal

injury and/or damage to this unit. If something drops into the

set, contact your dealer.

• When using a humidifier, be sure to avoid condensation inside

this unit by allowing enough space around this unit or avoiding

excess humidification. Condensation might cause fire, damage

to this unit, and/or electric shock.

• Super-bass frequencies reproduced by this unit may cause a

turntable to generate a howling sound. In such a case, move

this unit away from the turntable.

• This unit may be damaged if certain sounds are continuously

output at high volume level. For example, if 20 Hz-50 Hz

sine waves from a test disc, bass sounds from electronic

instruments, etc., are continuously output, or when the stylus

of a turntable touches the surface of a disc, reduce the volume

level to prevent this unit from being damaged.

• If you hear distortion (i.e., unnatural, intermittent “rapping”

or “hammering” sounds) coming from this unit, reduce the

volume level. Extremely loud playing of a movie soundtrack’s

low frequency, bass-heavy sounds or similarly loud popular

music passages can damage this speaker system.

• Vibration generated by super-bass frequencies may distort

images on a TV. In such a case, move this unit away from the

TV set.

• Do not attempt to clean this unit with chemical solvents as this

might damage the finish. Use a clean, dry cloth.

• Be sure to read the “TROUBLESHOOTING” section

regarding common operating errors before concluding that the

unit is faulty.

• Install this unit near the wall outlet and where the AC power

plug can be reached easily.

Notes on remote controls and batteries

•  Do not spill water or other liquids on the remote control.
•  Do not drop the remote control.
•  Do not leave or store the remote control in the following

places:
– places of high humidity, such as near a bath
– places of high temperatures, such as near a heater or a stove
– places of extremely low temperatures
– dusty places

• Do not expose the remote control sensor of this unit to direct

sunlight or lighting such as inverted fluorescent lamps.

• If the batteries grow old, the effective operation range of the

remote control decreases considerably. If this happens, replace

the batteries with two new ones as soon as possible.

• Do not use old batteries together with new ones.
• Do not use different types of batteries (such as alkaline and

manganese batteries) together. Read the packaging carefully as

these different types of batteries may have the same shape and

color.

• Exhausted batteries may leak. If the batteries have leaked,

dispose of them immediately. Avoid touching the leaked

material or letting it come into contact with clothing, etc.