64410

Sony MDR-NC20 Anleitung

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ONOFF POWER
© 1996 Sony Corporation Printed in China
MDR-NC20
3-810-317-14(1)
Noise Canceling
Headphones
Operating Instructions
Manual de instrucciones
WARNING
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
To avoid electrical shock, do not open the
cabinet. Refer servicing to qualified
personnel only.
WARNING
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.
You are cautioned that any changes or modifications
not expressly approved in this manual could void
your authority to operate this equipment.
English
Owner’s Record
The model number is located at the rear side of the
battery box.
The serial number is located at the both sides of the
head band.
Record these numbers in the spaces provided below.
Refer to them whenever you call upon your Sony
dealer regarding this product.
Model No. MDR-NC20
Serial No.
Features
•Noise canceling headphones reduce ambient noise,
and provide a quieter environment to enhance audio
entertainment. Ambient sound is synthesized with
an anti-sound signal produced by the noise
canceling circuit, and reduced. (Over 10 dB is
reduced at 300 Hz.)
•Compact folding Style
•Neodymium magnets are used to deliver powerful
sound.
•Operates as passive headphone when noise
canceling circuit is not activated.
•Plug adaptor is supplied to connect directly to stereo
or dual jack of inflight music services.
•Plug types are compatible with Sony WALKMAN*
remote controllers and stereo mini jacks of audio
and visual equipment.
* WALKMAN is a trademark of Sony Corporation.
Installing a battery
1 Open the lid of the battery box on the right outer
side of the headphone.
2 Insert one R03 (size AAA) battery by matching the
+ and – on the battery to the + and – in the battery
box.
3 Close the lid.
Battery life
When to replace the battery
Replace the battery with a new one when the POWER
indicator dims.
Battery
Sony alkaline LR03 (size
AAA) battery
Sony R03 (size AAA) battery
Approx. hours
40 hours
20 hours
Listening to music
1 Connect the headphones to the AV equipment.
2 Turn on the power of the headphones.
The power indicator lights in red. When the
power is turned on, ambient noise is reduced, and
you can listen to music more clearly at a lower
volume.
When connecting to dual or
stereo mini jacks of in-flight
music services.
Connecting cord
(supplied)
Connecting cord
(supplied)
When connecting to the
headphones jack (stereo mini
jack) of a WALKMAN, etc.
To headphone jack
on airplane seats
Micro plug
3 Put on the headphones so that the ear pads cover
your ears.
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.
•Do not use the headphones when use of electronic
equipment is prohibited or when use of personal
headphones for inflight 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.
• The noise canceling function may not work properly
unless the headphones are put on firmly.
• 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.
stereo mini jacksdual jacks
Microphone
Folding and unfolding the
headphones
Unfolding
Folding
Precautions
•Clean the headphones with a soft dry cloth.
•Do not leave the plug dirty otherwise the sound may
be distorted.
•Be sure to bring the headphones to a Sony dealer
when requiring a change of ear pads or 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
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, 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.
Specifications
General
Type Dynamic, closed
Driver units 30 mm dia: dome type
Impedance 24 ohms at 1 kHz
(when the power is on)
56 ohms at 1 kHz
(when the power is off)
Sensitivity 102 dB/mW (when the power is on)
100 dB/mW (when the power is off)
Frequency response
16 – 22,000 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. 175 g (6.2 oz) including
battery
Supplied accessories
Connecting cord 1m (39
3
/8 in.) (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)
Operating instructions (1)
Design and specifications are subject to change
without notice.
When connecting to the micro
jack on the remote controller of
a WALKMAN, etc.
1

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