JVC DM-NC40 ユーザーズマニュアル

Storage/usage location

■

Do not use or store the unit in the following loca-

tions. Malfunction may occur as a result.

• Location outside the allowed operating tem-

perature range (0°C ~ 40°C) where the tem-

perature may become extremely hot or cold.

• Location outside the allowed operating humid-

ity range (30% ~ 80%) where the humidity is

high.

• Location with strong magnetic force such as

from a transformer, motor, etc.

• Location with presence of electric waves such

as from a transceiver, mobile phone, etc.

• Location that is dusty or sandy.

• Location with strong vibrations.

• Location with condensation.

• Location where radiation, x-ray or corrosive gas

is generated.

Handling

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To prevent the internal temperature from rising,

do not stack units when using.

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Do not place the unit on its side.

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Handle the unit with caution and do not apply ex-

cessive force.

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Wipe the unit with a soft cloth.

The surface may fog or even melt when wiped

with benzene or paint thinner. For stubborn dirt,

use neutral detergent diluted in water and then

dry wipe.

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To completely cut off the power, disconnect the

power cable from the wall outlet or remove the

power cord from the AC inlet (AC IN) of the unit.

Installation

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Be sure to ground the unit.

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Place the unit near a wall outlet.

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Always use the specified (included) power cord.

Use of a cord other than that specified or a cord

that has been damaged may result in fire or elec-

trical shock.

■

Do not use the included power cord other than

with this unit.

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Do not place heavy objects such as a monitoring

television on top of the unit. Malfunction may oc-

cur as a result.

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Always request installation to the dealer of pur-

chase.

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About the echo canceller
The echo canceller of the unit is provided for the
prevention of howling. However, repeated echo-
ing of sound other than from a DM-NC40 may not
be suppressed sufficiently.
When using a speaker and a microphone at the
same time, place them apart, change the direc-
tion of the microphone or take caution so that the
playback sound from the speaker is not picked up
by the microphone.
When using a camcorder with audio AGC (Auto
Gain Control), the echo canceller may not work
properly. Please turn off the AGC.
If the AGC feature cannot be turned off, use a sepa-
rate microphone amplifier with no AGC.

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When not using the unit for a long time, turn the
power of the unit off for conserving energy.

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About electrical interference

When using the unit near a television, radio re-

ceiver or transceiver, screen images may become

disturbed or noise may be heard. In this case, try

the following:

• Place the unit away from radios and televisions

or change the direction of the unit.

• If an indoor antenna is used, change the direc-

tion or the location of the antenna.

• Use a wall outlet other than the one used for

radios, televisions, etc.

• Install a commercially-available noise filter be-

tween the wall output and power plug.

JVC assumes no responsibility whatsoever of

any effects that may occur as a result of

operating this unit.