JVC HA-W500RF Service Manual
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JVC HA-W500RF Service Manual

Cordless fm stereo headphones
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SERVICE MANUAL
CORDLESS FM STEREO HEADPHONES
HA-W500RF (EG)/(EK)
Specifications
General Specifications
System
: Radio Frequency (UHF stereo)
Modulation
: Frequency modulation
Carrier frequency
: 863-865 MHz
Usable area
(distance to reach)
: Approx. 100m (328 ft) : using
JVC measurements systems
Frequency response : 30 Hz-15,000 Hz
Distortion
: Less than 4 % (at 1 kHz)
Transmitter (J22121-001)
Power requirements : DC 9 V (with the exclusive AC
adaptor J47126-001(EG Model)
Audio input ter minal : 3.5 mm dia. stereo mini plug
Input impedance
: 25 k
Reference input level : 300 mV
Dimensions
: 100(W) x 100(D) x 106(H) mm
(3-15/16" x 3-15/16" x 4-3/16")
(Including antenna)
Mass
: 115 (4.1 oz)
(Without connection cord and AC
adaptor)
* Design and specifications subject to change without notice.
/J47127-001(EK Model))
COPYRIGHT
2002 VICTOR COMPANY OF JAPAN, LTD.
HA-W500RF (EG)/(EK)
Contents
Specifications ------------ Front cover
1. Disassembly ------------------------- 3
2. Schematic Diagram ---------------- 4
4. Print Circuit Board ----------------- 5
5. Wiring Diagram --------------------- 7
6. Block View Inside IC -------------- 7
7. Block Diagram ---------------------- 8
8. Electric Parts List ------------------ 8
9. Exploded view ----------------------- 9
11. Packing Method ------------------ 10
13. Accessories List ----------------- 10
Headphones (HA-W500RF)
Power requirements : Rechargeable
Ni-Cd batter y (1.2 V) x 2
Battery running time : 20 hours
(When charged for 24 hours)
Mass
: 280 (9.9 oz)
(With installed rechargeable
Ni-Cd batter y x 2)
Provided Accessories
Instructions
x 1
AC adaptor
x 1
Connection cord x 1 (3.5 mm dia. stereo mini jack-
RCA pin plug x 2 : 0.1 m (0.3 ft))
Plug adaptor
x 1 (converts 3.5 mm dia. stereo
mini plug to a 6.3 mm dia. standar d
stereo phone plug)
No.70270
Sep. 2002

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  • Page 1: Table Of Contents

    HA-W500RF (EG)/(EK) SERVICE MANUAL CORDLESS FM STEREO HEADPHONES HA-W500RF (EG)/(EK) Contents Specifications ------------ Front cover 1. Disassembly ------------------------- 3 2. Schematic Diagram ---------------- 4 3. Measurement Condition --------- 5 4. Print Circuit Board ----------------- 5 5. Wiring Diagram --------------------- 7 6.
  • Page 2 HA-W500RF (EG)/(EK) 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.

  • Page 3: Disassembly

    HA-W500RF (EG)/(EK) 1.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) 1.Remove the ear pad 1 from the driver unit ass'y (L) 2 and (R) 3.

  • Page 4: Schematic Diagram

    HA-W500RF (EG)/(EK) 2.Schematic diagram ANT1 0.001u 0.01u 0.01u C874p Test-3 C881000p 15nH 0.1U 0.33uh Test-1 100p 0.01U 15nH 0.01u Test-1 High RF in 863 MHz 100 p 15nH Test-3 Low RF in 5508 5508 C254U7 Test-5 R out Test-6 L out...

  • Page 5: Measurement Condition

    HA-W500RF (EG)/(EK) 3.Measurement Condition Reference input signal :1kHz 300mVp-p sine wave AC IN Hedaphone volume control : MAX Distance : 1m (3.28ft) Transmitter Receiver (Headphones) 4.Print Circuit Board Receiver (Headphones) CHARGE P. C. BOARD shows the B(+) power supply shows the ground shows others.
  • Page 6 HA-W500RF (EG)/(EK) 4.Print Circuit Board Receiver (Headphones) MAIN P.C.BOARD shows the B(+) power supply shows the ground shows others. Surface Back side Receiver (Headphones) MAIN P.C.B. LOCATION Symbol Location Symbol Location Symbol Location Symbol Location Symbol Location Resistors Resistors Capacitors Capacitors CHG.PCB...

  • Page 7: Wiring Diagram

    HA-W500RF (EG)/(EK) 5.Wiring Diagram Inside of the housing (R) Inside of the housing (L) Red lead Ni-Cd Battery Black lead Antenna Black lead Inside of the head band ass'y Natural shielded lead Red lead Speaker Red shielded lead (Rch) Green...

  • Page 8: Block Diagram

    HA-W500RF (EG)/(EK) 7.Block Diagram Receiver (Headphones) TUNING Rch OUT HEADPHONE AF OUT FM STEREO RADIO RF IN FILTER MODULE IC2:CXA1538M IC3:LM4809 Lch OUT AF OUT IF IN FE OUT DISCRI VOLUME Ni-Cd Battery POWER INDICATOR (1.2V) x 2 LED RED...

  • Page 9: Exploded View

    HA-W500RF (EG)/(EK) 9.Exploded View Receiver(Headphones) Charge P.C.B. Ass'y Main P.C.B. Ass'y 10.Mechanical Parts List Receiver(Headphones) Item No. Parts No. Parts Name Q'ty Description J34073-001 Headband Ass'y with connecting wir e J34074-001 Housing(L) Ass'y with battery terminal J34075-001 Housing(R) Ass'y J34076-001...

  • Page 10: Packing Method

    HA-W500RF (EG)/(EK) 11.Packing Method 12.Packing Materials Parts List Item No. Parts No. Parts Name Q'ty Description J22110-001 Packing case for (EG) model J22110-002 Packing case for (EK) model J22135-001 Packing Holder J47142-001 Sub Packing Holder QPA01202005 Poly Bag for transmitter...
  • Page 11 HA-W500RF (EG)/(EK) < MEMO > (No.70270) 11...
  • Page 12 HA-W500RF (EG)/(EK) VICTOR COMPANY OF JAPAN, LIMITED COMMUNICATION NETWORK BUSINESS UNIT AV & MULTIMEDIA COMPANY 1644, Shimotsuruma, Yamato, Kanagawa 242-8514, Japan Printed in Japan No.70270 200209...

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