JVC HAW-600-RF Service manual

SERVICE MANUAL

FM CORDLESS HEADPHONES

XC04820067

HA-W600RF-J/C/G/B

Model No. Model No.

J/C Model

900MHz

G/B Model

863MHz

SPECIFICATION

General Specifications

System Radio Frequency (UHF stereo)
Modulation Frequency modulation
Carrier frequency 912.0 / 912.5 / 913.0 MHz (J/C Model), 863.5 / 864.0 / 864.5MHz (G/B Model)
Usable area (distance to reach) Approx. 50 m /164 ft (J/C Model), 100 m /328 ft (G/B Model): using JVC measurement systems
Frequency response 25 - 13,000 Hz
Distortion Less than 3% (at 1 kHz)

Transmitter (J22320-001 : J/C Model, J22321-001 : G/B Model)

Power requirements DC12V(with the exclusive AC adaptor J34675-001(J/C Model)/J34676-001(G Model)/J34677-001(B Model))
Audio input terminal 3.5 mm dia. stereo mini jack

Input impedance 36kΩ

Reference input level 350 mV

Dimensions 159 (W) × 114 (D) × 123 (H) mm (6.26" × 4.49" × 4.84")

Mass 280 g (9.9 oz) (without connection cord and AC adaptor)

Headphones (HA-W600RF)

Power requirements Rechargeable Ni-MH battery (1.2V) × 2

Battery running time 10 hours (when charged for 30 hours)
Mass 250 g (8.8 oz) (with installed rechargeable battery)

Provided Accessories

Instructions × 1, AC adaptor × 1, Connection cord × 1 (3.5 mm dia. stereo mini plug - 3.5 mm dia. stereo mini plug :

2.2 m (7.22 ft)), Conversion cord × 1(3.5 mm dia. stereo mini jack - RCA pin plug × 2 : 0.1 m (0.33 ft)),Rechargeable
Ni-MH battery × 2,Plug adaptor × 1 (converts 3.5 mm dia. stereo mini plug to a 6.3 mm dia. standard stereo phone

Design and specifications subject to change without notice.

plug)

COPYRIGHT © 2006 Victor Company of Japan, Limited

No.XC048

2006/7

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 original 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 ex-

posed 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.XC048)

SECTION 2

)

DISASSEMBLY

Transmitter

In case of some problems arise in this transmitter unit, have to change the transmitter unit itself, due to avoid the law of radio reg­ulation.

Receiver (Headphones)

Head band

Ear pad

Battery cover

A

A

Driver unit ass'y (R)

Power P.C.B. Ass'y

End pin

E

Hanger cover (L)

Hanger (L)

Main P.C.B. Ass'y

B

B

Sub band ass'y

End pin

Hanger cover (R)

D

D

Battery contact

E

Driver unit ass'y (L)

C

Hanger (R

C

L

Ear pad

Battery contact

Housing (R)

Remove the driver unit ass'y (R) and power P.C.B. ass'y

(1) Ear pad and battery cover are removed.
(2) Remove the three screws A attaching the driver unit ass'y (R).
(3) Remove the two screws B attaching the power P.C.B. ass'y.
(4) The solder of each wire connected with driver unit ass'y (R) and power P.C.B. ass'y is removed.

* Please confirm that it is in the ditch where battery contact (four places) on the power P.C.B ass'y exists in housing (R)
when you install the power P.C.B. ass'y in housing (R).

Remove the driver unit ass'y (L) and main P.C.B. ass'y

(1) Ear pad is removed.
(2) Remove the three screws C attaching the driver unit ass'y (L).
(3) Remove the two screws D attaching the main P.C.B. ass’y.
(4) The solder of each wire connected with driver unit ass’y (L) and main P.C.B. ass’y is removed.

R

(No.XC048)1-3

Remove the sub band ass’y

(1) Remove the two screws E attaching the hanger cover (L) and (R)
(2) Right and left end pin is removed.

Remove the head band ass’y

• Prior to performing the following procedure, remove the driver unit ass'y (L/R), power P.C.B. ass’y, main P.C.B. ass’y, sub band
ass’y.
(1) Head band ass’y is removed while drawing out the wire from ditches that exist in hanger (L/R) and head band ass’y.

1-4 (No.XC048)

3.1 Measurement Condition

AC IN

Transmitter

SECTION 3

TROUBLESHOOTING

Reference input signal :1kHz 350mVp-p sine wave
Hedaphone volume control : MAX

Distance : 1m (3.28ft)

Receiver (Headphones)

(No.XC048)1-5

Victor Company of Japan, Limited
ACCESSORIES CATEGORY 1644, Shimotsuruma, Yamato, Kanagawa 242-8514, Japan

(No.XC048)

Printed in Japan

VPT