Sony NTM-DA1 Manual

DC IN 5 V jack

Microphone

Power switch

Base

Power indicator 
light

RANGE ALM 

(Range alarm) 

indicator light

BATT/CHG 

(Battery/Charge) 

indicator light

Power/VOICE ACT 

switch

Jack cover*/  

DC IN 5 V jack

Built-in Stand/

Belt clip

VOLUME indicator

VOLUME control

SOUND LEVEL 
indicator lights

Speaker

Strap hole

*  If you use the product near water, close the jack cover of the DC IN 5V jack firmly. If it is left open, moisture may get 

inside the product and may cause a malfunction.

BATT/CHG indicator light

Off: power off

Green: power on

Orange: charging

Flashing in red: low battery

RANGE ALM indicator light

Red: indicates the receiver has been moved out of the reception range.

SOUND LEVEL indicator lights

Red: indicates the input sound volume level from the transmitter (off [low] to 3 
[high]).

Transmitter (1)
Receiver (1)
AC adaptors (2)

Operating Instructions (this sheet)

ˎ

ˎ The same AC adaptor is supplied for the transmitter and the receiver.

More than 0.9 m (3 ft)

Place the transmitter more than 0.9 m (3 feet) away from your child.

Connect the supplied AC adaptor to the DC IN 5 V jack and plug it into a wall outlet.

ˎ

ˎ The transmitter clicks when it is turned to the maximum angle. Do not try to turn it any further.

ˎ

ˎ Do not place the transmitter or the AC adaptor cord within reach of children.

ˎ

ˎ Do not place the transmitter or the AC adaptor cord in, or attach it to, a crib or playpen.

ˎ

ˎ Never use extension cords with the AC adaptor. Use only the AC adaptor provided.

ˎ

ˎ Make sure that the transmitter is not covered or obstructed in picking up sounds.

A screw is not supplied. Prepare commercially available screw (diameter: 3.1 mm to 3.5 mm 
(1/8 in to 9/64 in), length: more than 20 mm (25/32 in)) suitable for the mounting hole at the 
bottom of the transmitter.

3.1 mm – 3.5 mm
(1/8 in – 9/64 in)

More than 20 mm
(More than 25/32 in)

5.7 mm – 6.5 mm
(7/32 in – 17/64 in)

2.3 mm – 2.5 mm
(3/32 in – 7/64 in)

Screw the screw into the wall.
Be sure the screw head protrudes between 2.5 mm and 3 mm (1/8 in) from the surface of 
the wall.

Hold the transmitter and turn it until it clicks.

Mount the transmitter on the screw.

Between 2.5 mm
and 3 mm (1/8 in)

ˎ

ˎ The transmitter clicks when it is turned to the maximum angle. Do not try to turn it any further.

ˎ

ˎ When mounting the transmitter on a wall, use the screw suitable to the wall material or strength. Attaching screw 

may damage the wall. Attach the screw firmly to a pillar or a stud in a wall, if possible.

ˎ

ˎ Connect the AC adaptor cord to the transmitter, mount the transmitter on the wall, then connect the AC adaptor to 

a wall outlet.

ˎ

ˎ Sony is not responsible for accidents or damage caused by improper installation, insufficient wall strength or 

improper screw installation, natural calamity, etc.

ˎ

ˎ Fasten the screw securely so that the transmitter does not fall off the wall.

Open the jack cover of the DC IN 5V jack.

Connect the supplied AC adaptor to the DC IN 5 V jack and plug it into a wall outlet.

Open the stand, and adjust the receiver angle.

ˎ

ˎ Place the receiver on a stable surface. If the receiver is placed on an unstable surface or in an inclined position, it 

may fall or topple over, and may cause injury.

ˎ

ˎ Adjust the receiver angle until it is stable. If you incline the receiver too much, the it may topple over.

When you carry the receiver by hanging it on your neck or attaching it to your belt, the receiver 
operates on the built-in battery. The BATT/CHG indicator light will show the remaining battery 
power.

ˎ

ˎ No strap is supplied. Use a strap of sufficient strength.

Belt

ˎ

ˎ If you attach the receiver to your belt using the belt clip, handle it carefully to avoid dropping it.

When the receiver is connected to the AC adaptor and the built-in battery has discharged to a 
certain level, the built-in battery starts charging automatically and is charged up to full charge.

It will last about 16 hours after it has been fully charged (when operated with the medium 
volume level, and Voice Activation off).

About 7 hours are required to charge the empty battery to its full capacity, in an ambient 
temperature of 25 °C (77 °F). Charging may take longer, depending on whether or not the 
receiver is turned on and other ambient conditions.

When the battery power is getting low, a beep sounds and the BATT/CHG indicator light of the 
receiver flashes in red.

ˎ

ˎ If you consume the battery power completely and leave it like that, the battery life may be affected. Charge the 

battery by connecting it to the AC adaptor as soon as it has been used up.

ˎ

ˎ Even if you do not intend to use the receiver for a long period, charge the battery to its full capacity once every 

6 months to maintain its performance.

Power/VOICE ACT 

switch

Power switch

Set the power switch of the transmitter to ON.

Set the Power/VOICE ACT switch of the receiver to ON or VOICE ACT.
You will hear sound from the speaker.

ˎ

ˎ When the receiver is turned on while the transmitter is not on, an alarm sounds in the receiver as no signal can be 

transmitted. We recommend turning the transmitter on first.

ˎ

ˎ Do not turn the power on when the receiver is close to the transmitter. Feedback noise will be generated.

ˎ

ˎ According to the level of sound detected by the microphone of the transmitter, more SOUND LEVEL indicator lights 

(up to 3 lights) turn on in red.

ˎ

ˎ The receiver sounds an alarm when it is moved out of the transmission range.

Set the Power/VOICE ACT switch of the receiver to OFF.

Set the power switch of the transmitter to OFF.

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 the VOLUME control. If the volume level is set too high and is 
accompanied by a shrill noise, reduce the volume.

To increase sound volume, turn the VOLUME control downward. The green area of the 

VOLUME indicator is extended.

To decrease sound volume, turn the VOLUME control upward. The green area of the VOLUME 

indicator is reduced.

VOLUME indicator 
(Green)

VOLUME control

The sound volumes decreased.

The sound volumes increased.

ˎ

ˎ The SOUND LEVEL indicator lights turn on according to the input sound level received from the transmitter. The 

level setting of the VOLUME control does not affect it.

The Voice Activation function ensures that when the transmitter has detected sound of more 
than a certain volume, monitor sound is automatically output from the speaker of the receiver.
This function is usable when it is not required for the receiver to constantly check for sounds 
from the nursery, such as when the baby is sleeping quietly or the parents are sleeping.

Set the Power/VOICE ACT switch to VOICE ACT to turn the function on.

Should any problem persist after you have made the following checks, consult your nearest 
Sony dealer. For checking or repairing the Digital Audio Nursery Monitor, the Sony dealer must 
have your transmitter and receiver together, even if only one of them seems to have a 
problem.

ˎ

ˎ The AC adaptor is disconnected from the wall outlet.

ˎ

ˎ The battery of the receiver is used up.

ˎ

ˎ The receiver is too far from the transmitter.

ˎ

ˎ Volume is low. (The volume is turned down.)

ˎ

ˎ In quiet surroundings, the Power/VOICE ACT switch of the receiver is set to the VOICE ACT 

position.

ˎ

ˎ The receiver is too far from the transmitter.

ˎ

ˎ Interference from another device (microwave oven, Wi-Fi device, BLUETOOTH device, etc.) 

using 2.4 GHz frequency. 

ˎ

C Turn off the device, or move it further from the transmitter and receiver.

ˎ

ˎ The transmitting distance of the radio is 270 m (900 ft) in the line of sight, however, it may be 

shortened by obstructions between the transmitter and the receiver, such as walls or 
furniture.

ˎ

C Change the location of the transmitter and receiver so that they are close to each other.

ˎ

ˎ The receiver is too close to the transmitter.

ˎ

ˎ Volume is too high.

ˎ

ˎ The transmitter is not turned on.

ˎ

ˎ The receiver is too far from the transmitter.

ˎ

ˎ There is an obstruction between the transmitter and the receiver.

ˎ

ˎ The battery charge is getting low.

The receiver sounds the warning alarm in the following cases.
Take appropriate action, according to the alarm.

 

Ą When the receiver is moved out of the reception range:

ˎ

ˎ The receiver sounds 4 beeps per second consecutively.

ˎ

ˎ The RANGE ALM indicator light turns in red.

ˎ

C Move the receiver closer to the transmitter.

 

Ą When the power of the built-in battery of the receiver is running out:

ˎ

ˎ If the battery power is getting low, the receiver sounds 3 beeps per second 3 times. If you 

continue using the receiver, the receiver sounds a beep for several seconds then turns off 
automatically.

ˎ

ˎ The BATT/CHG indicator light flashes in red.

ˎ

C Connect the receiver to the AC adaptor.

When the problem indicated by the alarm is corrected, the alarm stops automatically.
If you want to turn off the alarm, set the Power/VOICE ACT switch to OFF to turn off the 
receiver.

ˎ

ˎ You cannot adjust the alarm volume.

ˎ

ˎ There is no setting allowing you to disable the alarm function.