Cautionary Notes

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

To prevent the internal temperature from rising, do not stack units when using.

Do not place the unit on its side.

Handle the unit with caution and do not apply ex- cessive force.

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.

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

Be sure to ground the unit.

Place the unit near a wall outlet.

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.

Do not place heavy objects such as a monitoring television on top of the unit. Malfunction may oc- cur as a result.

Always request installation to the dealer of pur- chase.

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.

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

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.

Introduction

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