Sony MDR NC5 Operating Instructions

Noise Canceling
Headphones
Operating Instructions
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MDR-NC5
Sony Corporation © 1997
Printed in Japan
WARNING Features
To prevent fire or shock hazard, do • Noise canceling headphones reduce ambient
noise, and provide a quieter environment to
not expose the unit to rain or
enhance audio entertainment. Ambient sound is
moisture.
synthesized with an anti-sound signal produced
To avoid electrical shock, do not open
by the noise canceling circuit, and reduced.
the cabinet. Refer servicing to (Over 10 dB is reduced at 300 Hz.)
• Compact folding style
qualified personnel only.
• Neodymium magnets are used to deliver
powerful sound.
• Operates as passive headphones when noise
canceling circuit is not activated.
• Plug adaptor is supplied to connect directly to
stereo or dual jack of in-flight music services.
• Plug types are compatible with micro jack of
Sony WALKMAN* remote controllers and
stereo mini jacks of audio and visual equipment.
* WALKMAN is a trademark of Sony
Corporation.
3-860-868-53(1)

Installing a battery

1
Open the lid of the battery case on the
right inner side of the headphone.
Slide the battery case
lid and unlock it.
2
Insert one R03 (size AAA) battery by
matching the + and – on the battery to the
+ and – in the battery case.
3
Close the lid.
Slide the battery case
lid and lock it.
Battery life
Battery Approx. hours
Sony alkaline LR03 (size 14 hours
AAA) battery
Sony R03 (size AAA) battery 7 hours
When to replace the battery
Replace the battery with a new one when the
POWER indicator dims.

Listening to music

Folding and unfolding
the headphones
1
Connect the headphones to the AV
equipment.
Folding
When connecting to dual or Hold the battery case with your right hand and
stereo mini jacks of in-flight
fold the headphones toward you one after another
music services. as illustrated.
Connecting cord
(supplied)
Plug adaptor
(supplied)
To headphone jack
on airplane seats
When connecting to the
headphones jack (stereo mini
jack) of a WALKMAN, etc.
Connecting cord
(supplied)
Micro plug
When connecting to the micro
jack on the remote controller
of a WALKMAN, etc.
Unfolding
Hold the battery case with your right hand and
2
Turn on the power of the headphones.
unfold the headphones toward you one after
The power indicator lights in red. When
another as illustrated.
the power is turned on, ambient noise is
reduced, and you can listen to music
more clearly at a lower volume.
3
Put on the headphones so that the ear
pads cover your ears.
Battery case
4
Turn on the power of the AV equipment.
Notes on using on the airplane
• The supplied plug adaptor can be connected to
dual and stereo mini jacks.
for dual jacks for stereo mini jacks
Note
Do not pull open this way.
• Do not use the headphones when use of
electronic equipment is prohibited or when use
of personal headphones for in-flight music
services is prohibited.
If you have any questions or problems concerning
the system that are not covered in this manual,
please consult the nearest Sony dealer.
After listening to music
Turn off the power of the headphones.
Notes
• The noise canceling function is only effective for noise in
the low frequency band. Although noise is reduced, it
is not canceled completely.
• Do not cover the microphone of the headphones with
your hands. The noise canceling function may not work
properly.
• If you cover the microphone of the headphones with
your hands, howling may occur.
In this case, move your hands away from the
microphone.
Microphone
• You can use the headphones without turning on the
power. In this case, the noise canceling function is not
active, and the headphones operate as passive
headphones.
Precautions
• Clean the headphones with a soft dry cloth.
• Do not leave the plug dirty otherwise the sound
may be distorted.
• Be sure to consult a Sony dealer when the
earpads become dirty or damaged, or when the
headphones require repair work.
• The CE mark on the unit is valid only for
products marketed in the European Union.
• Do not leave the stereo headphones in a location
subject to direct sunlight, heat or moisture.
Notes on headphones
Battery case
Preventing hearing damage
Avoid using headphones at high volume. Hearing
experts advise against continuous, loud and
extended play. If you experience a ringing in your
ears, reduce the volume or discontinue use.
Do not listen with the headphones
while driving or cycling
As your headphones reduce outside sounds, it
may cause traffic accident. Also avoid using them
where hearing must not be impaired, for example,
at a railroad crossing, a site of construction, etc.

Troubleshooting

No sound
• Check the connection of the headphones and the
AV equipment.
• Check that the connected AV equipment is
turned on.
• Turn up the volume of the connected AV
equipment.
Muffled sound
• Turn down the volume of the connected AV
equipment.
• Replace the battery.
Power does not turn on
• Check if the battery has expired (the POWER
Battery case
indicator dims).
Replace the battery with a new one.
Howling
• If you cover the microphone of the headphones
with your hands, howling may occur.
In this case, move your hands away from the
microphone.

Specifications

General
Type Dynamic, open
Driver units 30 mm dia: dome type
Impedance 17 ohms at 1 kHz
(when the power is on)
35 ohms at 1 kHz
(when the power is off)
Sensitivity 100 dB/mW (when the power is
on)
98 dB/mW (when the power is off)
Frequency response
30 – 15,000 Hz
Frequency range of active noise attenuation
40 – 1,500 Hz more than 10 dB at
300 Hz
Input cord 0.5 m cord with a gold-plated
microplug
Power source DC 1.5 V, 1 R03 (size AAA)
battery
Mass Approx. 125 g including battery
Supplied accessories
Sony R03 (size AAA) battery (1)
Connecting cord 1m (a gold-plated micro jack t
a gold-plated L shaped stereo mini plug) (1)
Plug adaptor for in-flight use* (single/dual) (1)
Carrying case (1)
* May not be compatible with some in-flight music
services.
Design and specifications are subject to change
without notice.