Sony mdr-nc50 Service Manual

SERVICE MANUAL
Ver. 1.3 2006.08
SPECIFICATIONS
General
Type Dynamic, closed
Driver units 40 mm, dome type
Power handling capacity
100 mW
40 Ω at 1 kHz (when the power is on)
Impedance
100 Ω 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)
14 − 22,000 Hz
Frequency response
Frequency range of active noise attenuation
40 − 1,500 Hz, more than 14 dB at 300 Hz
DC 1.5 V, 1 × R03 (size AAA) battery
Power source
Mass Approx. 290 g (11 oz) including battery
Battery life
Battery Approx. hours*
Sony alkaline LR03/AM-4 (N) 30 hours*
(size AAA) battery
Sony manganese R03/ UM-4 15 hours*
(NU) (size AAA) battery
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
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.
Sony Corporation
9-879-314-04
Personal Audio Division
2006H05-1
Published by Sony Techno Create Corporation
© 2006.08
1
2
2
MDR-NC50
UNLEADED SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free 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.
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
US Model
Canadian Model
AEP Model
UK Model
E Model
Tourist Model
NOISE CANCELING
HEADPHONES