Sony NTM-910DUAL User Manual

3-242-835-21(1)

For your protection, please read these safety instructions completely before operating the appliance,
and keep this manual for future reference.
Carefully observe all warnings, precautions and instructions on the appliance and in the operating
instructions, and adhere to them.

INSTALLATION

Water and Moisture

Do not use powerline operated appliances near water - for example, near a bathtub, washbowl,
kitchen sink, or laundry tub, in a wet basement, or near a swimming pool, etc.

Heat

Do not place the appliance near or over a radiator or heat register, or where it is exposed to direct
sunlight.

Ventilation

The slots and openings in the cabinet are provided for necessary ventilation. To ensure reliable
operation of the appliance, and to protect it from overheating, these slots and openings must never be
blocked or covered.

-Never cover the slots and openings with a cloth or other materials.

-Never block the slots and openings by placing the appliance on a bed, sofa, rug or other similar
surface.

-Never place the appliance in a confined space, such as a bookcase, or built-in cabinet, unless proper
ventilation is provided.

Accessories

Do not place the appliance on an unstable cart, stand, tripod, bracket, or table. The appliance may fall,
causing serious injury to a child or an adult, and serious damage to the appliance. Use only a cart,
stand, tripod, bracket, or table recommended by Sony.

-An appliance and cart combination should be moved with care. Quick stops, excessive force, and
uneven surfaces may cause the appliance and cart combination to overturn.

Wall or Ceiling Mounting

If your appliance can be mounted to a wall or ceiling, mount it only as recommended by Sony.

USE

Power Source

This appliance should be operated only from the type of power source indicated on the marking label.
If you are not sure of the type of electrical power supplied to your home, consult your dealer or local
power company. For those appliances designed to operate from battery power, or other sources, refer
to the operating instructions.

Grounding or Polarization

This appliance is equipped with a polarized AC power cord plug (a plug having one blade wider than
the other), or with a three-wire grounding type plug (a plug having a third pin for grounding). Follow
the instructions below:

-For the appliance with a polarized AC power cord plug:

This plug will fit into the power outlet only one way. This is a safety feature. If you are unable to
insert the plug fully into the outlet, try reversing the plug. If the plug should still fail to fit, contact
your electrician to have a suitable outlet installed. Do not defeat the safety purpose of the polarized
plug by forcing it in.

-For the appliance with a three-wire grounding type AC plug:

This plug will only fit into a grounding-type power outlet. This is a safety feature. If you are unable to
insert the plug into the outlet, contact your electrician to have a suitable outlet installed. Do not defeat
the safety purpose of the grounding plug.

Overloading

Do not overload wall outlets, extension cords or convenience receptacles beyond their capacity, since
this can result in fire or electric shock.

When not in use

Unplug the power cord of the appliance from the outlet when left unused for a long period of time.
To disconnect the cord, pull it out by grasping the plug. Never pull the plug out by the cord.

Power-Cord Protection

Route the power cord so that it is not likely to be walked on or pinched by items placed upon or
against them, paying particular attention to the plugs, receptacles, and the point where the cord exits
from the appliance.

Lightning

For added protection for this appliance during a lightning storm, or when it is left unattended and
unused for long periods of time, unplug it from the wall outlet and disconnect the antenna or cable
system. This will prevent damage to the appliance due to lightning and powerline surges.

Object and Liquid Entry

Never push objects of any kind into the appliance through openings as they may touch dangerous
voltage points or short out parts that could result in a fire or electric shock. Never spill liquid of any
kind on the appliance.

Cleaning

Unplug the appliance from the wall outlet before cleaning or polishing it. Do not use liquid cleaners
or aerosol cleaners. Use a cloth lightly dampened with water for cleaning the exterior of the appliance.
Clean the appliance only as recommended by Sony.

Attachments

Do not use attachments not recommended by Sony, as they may cause hazards.

ANTENNAS

Outdoor Antenna Grounding

If an outdoor antenna or cable system is installed, follow the precautions below.
An outdoor antenna system should not be located in the vicinity of overhead power lines or other

electric light or power circuits, or where it can come in contact with such power lines or circuits.
WHEN INSTALLING AN OUTDOOR ANTENNA SYSTEM, EXTREME CARE SHOULD BE TAKEN
TO KEEP FROM CONTACTING SUCH POWER LINES OR CIRCUITS AS CONTACT WITH THEM
IS ALMOST INVARIABLY FATAL.

Be sure the antenna system is grounded so as to provide some protection against voltage surges and
built-up static charges. Section 810 of the National Electrical Code provides information with respect
to proper grounding of the mast and supporting structure, grounding of the lead-in wire to an
antenna discharge unit, size of grounding conductors, location of antenna-discharge unit, connection
to grounding electrodes, and requirements for the grounding electrode.

Antenna Grounding According to the National
Electrical Code

SERVICE

Damage Requiring Service

Unplug the appliance from the wall outlet and refer servicing to qualified service personnel under the
following conditions:

-When the power cord or plug is damage or frayed.

-If liquid has been spilled or objects have fallen into the appliance.

-If the appliance has been exposed to rain or water.

-The appliance does not appear to operate normally or exhibits a marked change in performance.

-This indicates a need for service.

-If the appliance does not operate normally when following the operating instructions, adjust only
those controls that are specified in the operating instructions. Improper adjustment of other controls
may result in damage and will often require extensive work
by a qualified technician to restore the appliance to normal operation.

-If the appliance has been subject to excessive shock by being dropped, or the cabinet has been
damaged.

Servicing

Do not attempt to service the appliance yourself as opening or removing covers may expose you to
dangerous voltage or other hazards.
Refer all servicing to qualified service personnel.

Replacement parts

When replacement parts are required, be sure the service technician has used replacement parts
specified by Sony that have the same characteristics as the original parts.
Unauthorized substitutions may result in fire, electric shock, or other hazards.

Safety Check

Upon completion of any service or repairs to the appliance, ask the service technician to perform
routine safety checks (as specified by Sony) to determine that the appliance is in safe operating
condition.

Antenna Discharge Unit
(NEC Section 810-20)

Grounding Conductors
(NEC Section 810-20)

Antenna Lead-in Wire

Ground
Clamps

NEC-NATIONAL
ELECTRICAL CODE

Electric Service
Equipment

Ground Clamps

Power Service Grounding Electrode System
(NEC Art 250 Part H)

IMPORTANT SAFEGUARDS

For customers who purchased this product in the USA

Please register this product on line at
Proper registration will enable us to send you periodic mailings about new products, services, and other
important announcements. Registering your product will also allow us to contact you in the unlikely
event that the product needs adjustment or modification. Thank you.

Sound-Sensor
Nursery Monitor

Operating Instructions

NTM-910DUAL

© 2007 Sony Corporation Printed in China

http://www.sony.com/productregistration .

WARNING

To reduce the risk of fire or
electric shock, do not expose this
apparatus to rain or moisture.

This symbol is intended to alert the
user to the presence of uninsulated
“dangerous voltage” within the
product’s enclosure that may be of
sufficient magnitude to constitute a
risk of electric shock to persons.

This symbol is intended to alert the
user to the presence of important
operating and maintenance (servicing)
instructions in the literature
accompanying the appliance.

* The graphical symbols are on the AC power

adaptor enclosure on the transmitter.

You are cautioned that any changes or
modifications not expressly approved in this
manual could void your authority to operate
this equipment.

INFORMATION

This equipment has been tested and found to
comply with the limits for a Class B digital device,
pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection
against harmful interference in a residential
installation. This equipment generates, uses and
can radiate radio frequency energy and, if not
installed and used in accordance with the
instructions, may cause harmful interference to
radio communications. However, there is no
guarantee that interference will not occur in a
particular installation. If this equipment does cause
harmful interference to radio or television
reception, which can be determined by turning the
equipment off and on, the user is encouraged to try
to correct the interference by one or more of the
following measures:
– Reorient or relocate the receiving antenna.
– Increase the separation between the equipment

and receiver.

– Connect the equipment into an outlet on a circuit

different from that to which the receiver is
connected.

– Consult the dealer or an experienced radio/TV

technician for help.

If you have any questions about this product, you
may call:
Sony Customer Information Services Center 1-800­222-7669 or http://www.sony.com/

Trade Name: SONY
Model: NTM-910 (Receiver unit)
Responsible Party: Sony Electronics Inc.
Address: 16530 Via Esprillo, San

Telephone Number: 858-942-2230

This device complies with Part 15 of the FCC
Rules. Operation is subject to the following two
conditions: (1) This device may not cause
harmful interference, and (2) this device must
accept any interference received, including
interference that may cause undesired
operation.

RECYCLING NICKEL METAL
HYDRIDE BATTERIES

Nickel Metal Hydride batteries
are recyclable.
You can help preserve our
environment by returning your
used rechargeable batteries to the collection and
recycling location nearest you.

For more information regarding recycling of
rechargeable batteries, call toll free
1-800-822-8837, or visit http://www.rbrc.org/

Caution: Do not handle damaged or leaking

Declaration of Conformity

Diego, CA 92127 USA

Nickel Metal Hydride batteries.

Features

• Up to 27 channels for maximized reception.

• Voice Activation eliminates most background
noise for a more peaceful sleep.

•5 indicators for monitoring sound levels.

• RANGE ALM., POWER/BATT and CHARGE
indicators allow you to know the operating
condition of the receiver.

• Water-resistance allows operating the receiver in
slight moisture areas such as kitchen or
bathroom.

• Operating on rechargeable battery pack.

Precautions

Safety Precautions

• Operate the transmitter only on 120 V AC, 60 Hz;
and the receiver on 9 V DC. To operate the
receiver on house current, use only the supplied
AC power adaptor; do not use any other type.
For battery operation, use one rechargeable
battery pack BP-TR10.

• Should any solid object or liquid fall into the unit,
disconnect the AC power adaptor and remove the
battery, and have the unit checked by a qualified
personnel before operating it any further.

• If you are not going to use the system for a long
time:
– Disconnect both transmitter and receiver from

the wall outlet by pulling out the plugs of both
AC power cord and AC power adaptor
respectively.

– Remove the battery out of the receiver to avoid

damage from battery leakage.

If you have any questions or problems concerning
your system, please consult your nearest Sony
dealer.

Precautions on Usage

This product cannot replace responsible
adult supervision of a child. It is designed to

assist adults in child supervision. Do not use it
for medical monitoring of a sick baby or child.

• The transmitter detects normal sound levels
within a range of 2 to 3 meters (6 to 10 feet) from
a child. If the child moves outside of this range, it
may not be able to detect sounds from him or her.

• It is essential that you check the operating range
and condition of the Sound-Sensor Nursery
Monitor on initial installation, and on a regular
basis after that.

• Stay close to the receiver in order to hear normal
sounds from it. Check the volume regularly to
ensure that it is set high enough.
Recharge the rechargeable battery pack in the
receiver or operate it on house current as soon as
the POWER/BATT indicator starts flashing and
the receiver sounds a beep.

• Be sure to place the transmitter out of the child’s
reach. Do not place the transmitter inside a crib or
playpen.

• The receiver can be affected by other devices in or
near your home that may interfere with the
signals sent by the transmitter. Such interference
can be caused by TV sets, cordless phones,
vacuum cleaners, car ignitions, and other
electrical devices. You should test the receiver
when you expect such devices to be in operation
while you are using the Sound-Sensor Nursery
Monitor.

• The signal from the transmitter can be received
by another receiver, as it uses a public air wave.

Cautions on Water-resistance (for
the receiver only)

This unit is designed so that it can be used with
slight exposure to water, rain, snow and other
forms of moisture, but there are several points on
which caution should be observed.

• Do not allow it to come into contact with large
amounts of water.

• Do not immerse it in water.

• If water should get on it or if it should fall into
water, take it out immediately and wipe it off
with a dry cloth. To prevent the battery from
corroding, wipe out the interior of the battery
compartment as follows:
– Open or close the battery compartment with

dry hands in a place without exposure to any
water.

– Wipe off the battery and the inside of the

battery compartment. Give special attention to
the contacts so that no water remains on them.

Troubleshooting

Should any problem persist after you have made
the following checks, consult your nearest Sony
dealer.

No sound (even with both units turned on)

• AC power cord or AC power adaptor is
disconnected from the wall outlet.

• Battery is used up.

• Receiver is too far from the transmitter.

• CH selectors of both transmitter and receiver are
not on the same settings.

Too much noise

• Weak battery.

• Receiver is too far from the transmitter.

• Interference from another electrical appliance.
Turn off the appliance, or move it further from
the receiver.

Weak reception

• Receiver is too far from the transmitter.

MONITOR indicator is not lit.

• Weak battery.

• Receiver is too far from the transmitter.

Buzzing, interference

• Another transmitter interfering.
Set the CH selectors of both the transmitter and
receiver to another setting.

Shrill noise

• Receiver is too close to the transmitter.

• Volume is too high.

Alarm continues to sound although the distance
between the transmitter and the receiver
becomes within operating range.

• Transmitter is not set to ON.

• CH selectors of both the transmitter and receiver
are not on the same settings.

Specifications

Frequency range: 902.200 - 904.900 MHz
Number of channels: 27 channels
Modulation system: FM

Transmitter

Circuitry: Crystal-controlled PLL circuit
Power requirement: 120 V AC, 60 Hz
Power consumption: 2 W
Dimensions:

101.8 × 99.5 × 63 mm (w/h/d) (41/8 × 4 × 21/
inches) not incl. projecting parts and antenna

101.8 × 140.5 × 63 mm (w/h/d) (4

1

2

/2 inches) incl. projecting parts and antenna

Mass: Approx. 229.5 g (8.1 oz)

Receiver

Circuitry: Single superheterodyne
Power requirement:

AC power adaptor (DC IN 9 V jack):
120 V AC, 60 Hz

2.4 V DC, Rechargeable battery pack
BP-TR10

Audio power output:

80 mW (using the supplied AC power adaptor)
28 mW (using 2.4 V DC)

Speaker: 57 mm dia., 8 Ω
Dimensions:

94 × 109 × 59 mm (w/h/d) (3
inches) not incl. projecting parts and antenna
94 × 157 × 59 mm (w/h/d) (3
inches) incl. projecting parts and antenna

Mass:

Approx. 184.3 g (6.5 oz)
Approx. 228.8 g (8.1 oz) incl. a rechargeable
battery pack

Supplied accessories:

AC power adaptor (2)
Rechargeable battery pack BP-TR10 (2)

Design and specifications are subject to change
without notice.

1

/8 × 55/8 ×

3

/4 × 43/8 × 23/

3

/4 × 61/4 × 23/

8

8

2

Transmitter

Built-in microphone

CHANNEL SELECT

CH selectors

Receiver

Front

MONITOR indicators

RANGE ALM. indicator

Speaker

CH windows

Lid of the DC IN 9V jack

DC IN 9V jack

CHARGE indicator

Rear

Cavity for hook

A

AC power cord

Antenna

POWER indicator

OFF/ON switch

CH windows

Antenna

POWER/BATT indicator

OFF/ON/VOICE ACT switch

CHANNEL SELECT

CH selectors

Belt clip

VOL

To a wall outlet

B

L

O

LOCK

To a wall outlet

Tab

OPEN

C

K

AC power adaptor

BP-TR10 battery pack

Red

Black

O

PEN

k

Packing*

* The attached packing is used to ensure water-resistance of

the battery compartment. Therefore, make sure to close the
battery compartment lid securely.

j

Battery wires

O

P

E

N

K

DC IN 9V jack

CHARGE indicator

C

Cavity for hook

Cavity for hook

Belt clip

Cavity for hook

j

Power Sources

Transmitter (See Fig. A)

Connect the AC power cord to a wall outlet.

Receiver

To operate on battery
(See Fig. B– )

1 Turn the tab of the battery compartment

lid at the rear of the receiver to the OPEN
position with a coin. Pull the depressions
on both sides to open the lid.

2 Connect the battery connector to the

battery terminal with correct polarity.
Black wire goes on the left side and red
wire goes on the right side.

3 Insert one rechargeable battery pack

BP-TR10 (supplied) into the battery
compartment.

Make sure the battery wires are positioned
properly so that the wires are not pushed out of
the compartment when closing the lid.

4 Close the lid, then turn the tab to the

LOCK position with a coin.

Note

When operating the receiver on a rechargeable
battery pack, make sure that the lid of the DC IN
9V jack of the receiver is closed securely to ensure
water-resistance of the receiver.

Battery life

(approx. hours for continuous standby) (JEITA*)

Sony rechargeable battery pack BP-TR10 22

* Measured by JEITA (Japan Electronics and Information

Technology Industries Association) standards. The actual
battery life may vary depending on the circumstance of
the unit.

When to recharge the rechargeable battery pack

If the sound becomes distorted or interrupted, we
recommend that you recharge the battery pack.
When the battery pack is used up, the POWER/
BATT indicator starts flashing and the receiver
sounds a beep. If the battery pack is extremely used
up, the beep may be interrupted or the POWER/
BATT indicator may flash when you turn on the
power. Recharge the battery pack as soon as
possible in either case. Recharge the battery pack
for more than 22 hours so that the battery pack is
fully charged. Turn off the receiver before charging
the battery pack. The CHARGE indicator remains lit
even after charging has been completed.

Charging duration

Approximately 22 hours are required to charge the
battery pack to its full capacity.

Notes on the rechargeable battery pack

• The battery pack will gradually discharge over a
long period of time, even if not in use.

• If you leave the weak battery pack inside the
receiver without charging it, the battery pack will
be completely discharged. It may require several
times of charging to recover to its full capacity.

Notes on replacing the rechargeable battery pack

• If the battery pack lasts only a few minutes even
after 22 hours of charging, the battery life has
expired and needs replacement.

• Before replacing the battery pack, make sure that
the receiver is turned off.

• Replace the battery pack with a new one. Contact
your local Sony authorized dealer or service
center, and ask for a Sony BP-TR10 rechargeable
battery pack.

• Do not use any other rechargeable battery pack.

To operate on house current
(See Fig. B– )

Open the lid of the DC IN 9V jack of the receiver.
Connect the supplied AC power adaptor to the DC
IN 9V jack and plug it in to a wall outlet. The
CHARGE indicator will light up whether or not the
receiver is turned on.

Notes on AC power adaptor

• When the AC power adaptor is not used, be sure
to turn off the receiver, and unplug it from the
DC IN 9V jack and the wall outlet. Then close the
lid of the DC IN 9V jack securely.

• Use only the supplied AC power adaptor. Do not
use any other AC power adaptor.

• Replace the AC power adaptor with the same
type as the one supplied if replacement is
necessary.

Polarity of the plug

Setting Up

Turning on the power

Set the OFF/ON switch of the transmitter and the
OFF/ON/VOICE ACT switch of the receiver to ON to

turn on the power.
The POWER indicator of the transmitter and the
POWER/BATT indicator of the receiver will light
up. To turn off the power, set the OFF/ON switch of
the transmitter and the OFF/ON/VOICE ACT switch
of the receiver to OFF.

Setting the frequency channels

Up to 27 channels can be set through the CH
selectors by changing the combination of three
colors (red, yellow and green) on the CH windows.
Set the CH selectors of both the transmitter and
receiver so that the settings of color combinations
shown in the CH windows are the same. Otherwise,
the transmitter and receiver will not function.
If the settings of the receiver and transmitter are
not the same, the RANGE ALM. indicator starts
flashing and the receiver sounds a beep.

If signal interference occurs

Set the CH selectors of both the transmitter and
receiver to another setting. Make sure that both the
settings shown in the CH windows are the same.

Setting up the transmitter
(See Fig. C– )

Place the transmitter within 2 to 3 meters (6 to 10
feet) from a crib or play area. If the child moves
outside of this range, the transmitter may not be
able to detect his/her sounds. The transmitter must
be placed upright during operation.

Tips for better reception

• Place the transmitter at a location as high as
practically possible such as on a table or on a wall.

• Make sure that the transmitter is not covered or
obstructed for picking up sounds.

• Make sure that nothing touches the antenna
during operation.

Notes

• Keep the transmitter out of the reach of the baby.
Do not place the transmitter inside a crib or
playpen.

• Position the transmitter with the front side where
the built-in microphone is located facing the baby.

• Do not use the antenna as a carrying handle.

• Do not use the antenna to hang the transmitter on
the wall. Be sure to use the cavity for hook.

Monitoring through the receiver
(See Fig. C– )

The longest distance you can place the receiver
from the transmitter varies according to
obstructions and other conditions. First, test the
operating range with the assistance of another
adult, or by placing a radio, etc., near the
transmitter. If you move outside the effective
operating range of the system, the RANGE ALM.
indicator lights up and the buzzer sounds. In such a
case, move closer toward the transmitter until the
indicator and the buzzer turn off.

Tips for better reception

• Keep the receiver upright during operation.

• Make sure that nothing touches the antenna
during operation.

The VOICE ACT function eliminates most
background noise when the receiver does not
detect any sound.
Set the OFF/ON/VOICE ACT switch to VOICE ACT
to turn on this function.

When the receiver receives sounds from the
transmitter, the MONITOR indicators light up from
left to right in five steps depending on the sound
level. Only one indicator may light up if the sound
from the transmitter is not loud, or all the
indicators may light up if the sound is very loud.
You can also hear sounds through the speaker.

To adjust the volume

The volume of the sounds you receive varies
depending on the loudness of the baby’s voice,
distance between the transmitter and the baby,
direction of the built-in microphone of the
transmitter, obstructions, etc.
Set the volume as required using VOL. If the
volume level is set too high and is accompanied by
a shrill noise, reduce the volume.
The volume level can be adjusted between the
smallest and biggest dots on the VOL.

Notes

• Avoid placing the units near heat sources or
where they are subject to direct sunlight,
excessive dust, moisture, or mechanical shock.

• Be careful not to drop the receiver in water, or
drop any liquid over it.

• Do not use the antenna as a carrying handle.

• Do not use the antenna to hang the receiver on
the wall. Be sure to use the cavity for hook.

Using Belt Clip (See Fig. C– )

The receiver has a belt clip located on the rear. It is
convenient when you move around, for example,
when you clean up the room, etc.
Insert your finger into the cavity for hook and slide
upwards as illustrated, then hang the belt clip onto
your belt.
When fixing the receiver onto your belt, be sure to
turn off the receiver, and disconnect the AC power
adaptor from the DC IN 9V jack and the wall outlet.
Then close the lid of the DC IN 9V jack securely.

Notes

• When using the belt clip, the receiver can be
operated only on battery.

• When you are not using the belt clip, push it back
to its original position.

• Make sure that you do not move outside the

effective operating range of the system.