JVC HAW-1000-RF Service manual
XC010200312
SERVICE MANUAL
CORDLESS FM STEREO HEADPHONES
HA-W1000RF-J/C/G
SPECIFICATION
General Specifications
System Radio Frequency (UHF stereo)
Modulation Frequency modulation
Carrier frequency 906-908 MHz (J/C Model), 863 - 865 MHz (G Model)
Usable area (distance to reach) Approx. 100 m (328 ft) : using JVC measurement systems
Frequency response 30 - 16,000 Hz
Distortion Less than 4% (at 1 kHz)
Transmitter (J22176-001 : J/C Model, J22176-002 : G Model)
Power requirements DC 7.5 V (with the exclusive AC adaptor J47310-001 (J/C Model) / J47311-001 (G Model))
Audio input terminal 3.5 mm dia. stereo mini jack,RCA pin jack × 2
Input impedance 27kΩ
Reference input level 300 mV
Dimensions 197 (W) × 137 (D) × 121 (H) mm (7.75" × 5.39" × 4.76") (including antenna)
Mass 320 g (11.2 oz) (without connection cord and AC adaptor)
Headphones (HA-W1000RF)
Power requirements Rechargeable Ni-MH battery (2.4 V)
Battery running time 35 hours (when charged for 24 hours)
Mass 270 g (9.52 oz) (with installed rechargeable battery)
Provided Accessories
Instructions × 1, AC adaptor × 1, Connection cord × 1 (3.5 mm dia. stereo mini plug - RCA pin plug × 2 : 1.8 m
(5.9 ft)), Plug adaptor × 1 (converts 3.5 mm dia. stereo mini plug to a 6.3 mm dia. standard stereo phone plug)
Design and specifications subject to change without notice.
COPYRIGHT © 2004 VICTOR COMPANY OF JAPAN, LIMITED
No.XC010
2004/01
SECTION 1
PRECAUTION
1.1 Safety Precautions
(1) This design of this product contains special hardware and
many circuits and components specially for safety purposes. For continued protection, no changes should be made
to the original design unless authorized in writing by the
manufacturer. Replacement parts must be identical to
those used in the original circuits. Services should be performed by qualified personnel only.
(2) Alterations of the design or circuitry of the product should
not be made. Any design alterations of the product should
not be made. Any design alterations or additions will void
the manufacturers warranty and will further relieve the
manufacture of responsibility for personal injury or property
damage resulting therefrom.
(3) Many electrical and mechanical parts in the products have
special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the
protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Replacement parts which have these special
safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features
are identified by shading on the schematics and by ( ) on
the Parts List in the Service Manual. The use of a substitute
replacement which does not have the same safety characteristics as the recommended replacement parts shown in
the Parts List of Service Manual may create shock, fire, or
other hazards.
(4) The leads in the products are routed and dressed with ties,
clamps, tubings, barriers and the like to be separated from
live parts, high temperature parts, moving parts and/or
sharp edges for the prevention of electric shock and fire
hazard. When service is required, the origin al lead routing
and dress should be observed, and it should be confirmed
that they have been returned to normal, after reassembling.
(5) Leakage shock hazard testing
After reassembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads,
headphone jack, control shafts, etc.) to be sure the product
is safe to operate without danger of electrical shock.Do not
use a line isolation transformer during this check.
• Plug the AC line cord directly into the AC outlet. Using a
"Leakage Current Tester", measure the leakage current
from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the
chassis, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).
• Alternate check method
Plug the AC line cord directly into the AC outlet. Use an
AC voltmeter having, 1,000Ω per volt or more sensitivity
in the following manner. Connect a 1,500Ω 10W resistor
paralleled by a 0.15µF AC-type capacitor between an exposed metal part and a known good earth ground.
Measure the AC voltage across the resistor with the AC
voltmeter.
Move the resistor connection to each exposed metal
part, particularly any exposed metal part having a return
path to the chassis, and measure the AC voltage across
the resistor. Now, reverse the plug in the AC outlet and
repeat each measurement. Voltage measured any must
not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5
mA AC (r.m.s.).
AC VOLTMETER
(Having 1000
ohms/volts,
or more sensitivity)
0.15 F AC TYPE
Place this
probe on
1500 10W
Good earth ground
1.2 Warning
(1) This equipment has been designed and manufactured to
meet international safety standards.
(2) It is the legal responsibility of the repairer to ensure that
these safety standards are maintained.
(3) Repairs must be made in accordance with the relevant
safety standards.
(4) It is essential that safety critical components are replaced
by approved parts.
(5) If mains voltage selector is provided, check setting for local
voltage.
1.3 Caution Burrs formed during molding may be left over on some parts
of the chassis.
Therefore, pay attention to such burrs in the case of preforming repair of this system.
1.4 Critical parts for safety
In regard with component parts appearing on the silk-screen
printed side (parts side) of the PWB diagrams, the parts that are
printed over with black such as the resistor ( ), diode ( )
and ICP ( ) or identified by the " " mark nearby are critical
for safety. When replacing them, be sure to use the parts of the
same type and rating as specified by the manufacturer.
(This regulation dose not Except the J and C version)
each exposed
metal part.
1-2 (No.XC010)
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