SERVICE MANUAL
NOISE CANCELING HEADPHONES
US Model
Canadian Model
AEP Model
E Model
Tourist Model
SPECIFICATIONS
MDR-NC22
Ver. 1.2 2007.02
9-887-426-03
2007B05-1
© 2007.02
Sony Corporation
Personal Audio Division
Published by Sony Techno Create Corporation
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
General
Type dynamic, closed
Driver units 13.5 mm, dome type (CCAW adopted)
Power handling capacity
50 mW
Impedance 20 Ω at 1 kHz
(when the power is on)
8.5 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)
Frequency response
8 – 22,000 Hz
Frequency range of active noise attenuation
50 – 1,500 Hz more than 12 dB at
200 Hz
Cord 1.5 m (59
1
/8 in) OFC litz cord,
neck-chain (including battery box)
Plug Gold-plated L type stereo mini plug
Power source DC 1.5 V, 1 × R03 (size AAA) battery
Mass Approx. 39 g (1.4 oz) including battery
box, cord, and battery
Supplied accessories
Sony R03 (size AAA) battery (1) (US, Tourist models)
Earbuds (S ×2, M ×2, L ×2)
Carrying pouch (1)
Plug adaptor for in-flight use* (single/dual) (1)
Operating Instructions (1)
*May not be compatible with some in-flight music services.
Design and specifications are subject to change without
notice.
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.
NOTES ON REPLACEMENT OF CSP (CHIP SIZE
PACKAGE) IC
Replacement of IC2 used in this set requires a special tool.
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