SONY MDRNC50
Manual de Servicio

MDR-NC50
SERVICE MANUAL
Ver. 1.2 2005.02

US Model Canadian Model AEP Model UK Model E Model Tourist Model

SPECIFICATIONS
General Type Driver units Power handling capacity Impedance
Dynamic, closed 40 mm, dome type 100 mW 40 � at 1 kHz (when the power is on) 100 � 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 14 � 22,000 Hz Frequency range of active noise attenuation 40 � 1,500 Hz, more than 14 dB at 300 Hz Power source DC 1.5 V, 1 � R03 (size AAA) battery Mass Approx. 290 g (11 oz) including battery

UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the leadfree mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with the lead free mark due to their particular size) : LEAD FREE MARK Unleaded solder has the following characteristics. � Unleaded solder melts at a temperature about 40 �C higher than ordinary solder. Ordinary soldering irons can be used but the iron tip has to be applied to the solder joint for a slightly longer time. Soldering irons using a temperature regulator should be set to about 350 �C. Caution: The printed pattern (copper foil) may peel away if the heated tip is applied for too long, so be careful! � Strong viscosity Unleaded solder is more viscou-s (sticky, less prone to flow) than ordinary solder so use caution not to let solder bridges occur such as on IC pins, etc. � Usable with ordinary solder It is best to use only unleaded solder but unleaded solder may also be added to ordinary solder.

Battery life
Battery Sony alkaline LR03/AM-4 (N) (size AAA) battery Sony manganese R03/ UM-4 (NU) (size AAA) battery Approx. hours*1 30 hours*2 15 hours*2

*1 1 kHz, 1 mW + 1 mW input *2 Time stated above may vary, depending on the temperature or conditions of use.

When to replace the battery
Replace the battery with a new one when the POWER indicator dims. The noise canceling feature may not work correctly if battery power is low.

Supplied accessories Connecting cord (0.5 m, gold-plated stereo mini plug (1) (Tourist only),
1.5 m, gold plated L type stereo mini plug (1)), R03 (size AAA) dry battery (1) (Tourist only), Carrying case (1), Plug adaptor for in-flight

Note on chip component replacement
� Never reuse a disconnected chip componet � Notice that the minus side of a teamtalum capacitor may be damaged by heat

use* (single/dual) (1), Gold-plated unimatch plug adaptor (stereo phone plug y stereo mini jack) (1), Operating Instructions (1) * May not be compatible with some in-flight music services. Design and specifications are subject to change without notice.

NOISE CANCELING HEADPHONES

9-879-314-03
2005B05-1 © 2005.02

Sony Corporation
Personal Audio Group Published by Sony Engineering Corporation