Sony Headphones MDR NC20 User Manual

3
Put on the headphones so that the ear pads cover  
your ears.  
3-810-317-14(1)  
Ow n e r’s Re co rd  
In st a llin g a b a t t e ry  
List e n in g t o m u sic  
Fo ld in g a n d u n fo ld in g t h e  
h e a d p h o n e s  
Tro u b le sh o o t in g  
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.  
No so u n d  
1
Open the lid of the battery box on the right outer  
side of the headphone.  
No ise Ca n ce lin g  
He a d p h o n e s  
• 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.  
1
Connect the headphones to the AV equipment.  
Un fo ld in g  
When connecting to dual or  
stereo mini jacks of in-flight  
music services.  
Operating Instructions  
Manual de instrucciones  
Model No. MDR-NC20  
Serial No.  
Connecting cord  
(supplied)  
Mu ffle d so u n d  
• Turn down the volume of the connected AV  
equipment.  
4
Turn on the power of the AV equipment.  
• Replace the battery.  
No t e s o n u sin g o n t h e a irp la n e  
• The supplied plug adaptor can be connected to dual  
and stereo mini jacks.  
2
Insert one R03 (size AAA) battery by matching the  
+ and – on the battery to the + and – in the battery  
box.  
Fe a t u re s  
To headphone jack  
on airplane seats  
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.)  
Sp e cifica t io n s  
When connecting to the  
headphones jack (stereo mini  
jack) of a WALKMAN, etc.  
Fo ld in g  
General  
Type  
Dynamic, closed  
Driver units  
Impedance  
30 mm dia: dome type  
24 ohms at 1 kHz  
(when the power is on)  
56 ohms at 1 kHz  
(when the power is off)  
102 dB/ mW (when the power is on)  
100 dB/ mW (when the power is off)  
Connecting cord  
(supplied)  
dual jacks  
stereo mini jacks  
• 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.  
• Do not use the headphones when use of electronic  
equipment is prohibited or when use of personal  
headphones for inflight music services is prohibited.  
MDR-NC20  
Sensitivity  
3
Close the lid.  
© 1996 Sony Corporation Printed in China  
If you have any questions or problems concerning the  
system that are not covered in this manual, please  
consult the nearest Sony dealer.  
Frequency response  
16 – 22,000 Hz  
Frequency range of active noise attenuation  
40 – 1,500 Hz more than 10 dB at  
300 Hz  
En g lish  
Aft e r list e n in g t o m u sic  
Turn off the power of the headphones.  
Micro plug  
* WALKMAN is a trademark of Sony Corporation.  
Pre ca u t io n s  
Input cord  
0.5 m cord with a gold-plated  
microplug  
DC 1.5 V, 1 × R03 (size AAA) battery  
Approx. 175 g (6.2 oz) including  
battery  
Notes  
WARNING  
• 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.  
When connecting to the micro  
jack on the remote controller of  
a WALKMAN, etc.  
Power source  
Mass  
• 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.  
To p re ve n t fire o r sh o ck h a za rd , d o n o t  
e xp o se t h e u n it t o ra in o r m o ist u re .  
Ba t t e ry life  
To a vo id e le ct rica l sh o ck, d o n o t o p e n t h e  
ca b in e t . Re fe r se rvicin g t o q u a lifie d  
p e rso n n e l o n ly.  
Supplied accessories  
Connecting cord 1m (39 3/  
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)  
Battery  
Approx. hours  
8
Sony alkaline LR03 (size  
AAA) battery  
40 hours  
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.  
• Do not leave the stereo headphones in a location  
subject to direct sunlight, heat or moisture.  
WARNING  
Sony R03 (size AAA) battery  
20 hours  
Operating instructions (1)  
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.  
No t e s o n h e a d p h o n e s  
Pre ve n t in g h e a rin g d a m a g e  
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.  
Wh e n t o re p la ce t h e b a t t e ry  
Replace the battery with a new one when the POWER  
indicator dims.  
Design and specifications are subject to change  
without notice.  
Microphone  
You are cautioned that any changes or modifications  
not expressly approved in this manual could void  
your authority to operate this equipment.  
Do n o t list e n w it h t h e h e a d p h o n e s w h ile  
d rivin g o r cyclin g  
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.  
• 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.  
 

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