JVC HANC-250 Schematic
SERVICE MANUAL
XC06320077SERVICE MANUAL
HA-NC250-J, HA-NC250-C,
HA-NC250-E
STEREO HEADPHONES
Model No.
COPYRIGHT © 2007 Victor Company of Japan, Limited
SPECIFICATION
Frequency response 8 Hz - 24, 000 Hz(Power-ON)
Noise reduction More than 16.5 dB at 150 Hz
Sensitivity 102 dB/1 mW (power - ON)
Input impedance 40
Driver unit Ø40 mm
Power supply AAA battery (DC 1.5 V) x 1
Battery life Approx. 20 hours* (using Manganese AAA battery)
Cord length** 1.2 m (3.9 ft) (detachable)
Mass 150 g (5.30 oz) (incl. battery)
Accessories Carrying case x 1, Manganese AAA battery (R03) x 1,
Designs and specifications are subject to change without notice.
COPYRIGHT © 2007 Victor Company of Japan, Limited
100 dB/1 mW (power - OFF)
Ω (power - ON), 96 Ω (power - OFF)
Approx. 50 hours* (using Alkaline AAA battery)
* Varies depending on operating conditions.
* Without ambient noise.
140 g (4.94 oz) (excl. battery)
Cord x 1(1.2 m Ø3.5 Stereo plug
Stereo phone plug adapter 6.3 mm (1/4 inch) x 1
(Lch)
↔Ø3.5 Stereo plug, Dual plug adapter (for in-flight use) x 1,
No.XC063
2007/7
SECTION 1
PRECAUTION
This service manual does not describe PRECAUTION.
SECTION 2
SPECIFIC SERVICE INSTRUCTIONS
This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.
SECTION 3
DISASSEMBLY
Hanger cover (R)
Ear pad (R)
Ear pad holder (R)
Housing (L)
B
d
b
Seal
Baffle plate (R)
Hanger (L)
Lch board
C
d
c
C
D
A
a
Microphone (L)
b
c
h
Hanger (R)
e
A
g
Hanger cover (L)
A
Seal
f
Microphone (R)
Speaker unit (R)
C
Rch board
g
f
C
B
D
Ear pad holder (L)
Ear pad (L)
Head band
a
h
B
Housing (R)
e
R
1-2 (No.XC063)
Speaker unit (L)
Baffle plate (L)
A
L
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