Jvc-HAW-1000-RF-Service-Manual 电路图 维修手册.pdf

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1、SERVICE MANUAL COPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LIMITED No.XC010 2004/01 CORDLESS FM STEREO HEADPHONES XC010200312 HA-W1000RF-J/C/G SPECIFICATION Design and specifications subject to change without notice. General Specifications SystemRadio Frequency (UHF stereo) ModulationFrequency modulatio

2、n Carrier frequency906-908 MHz (J/C Model), 863 - 865 MHz (G Model) Usable area (distance to reach) Approx. 100 m (328 ft) : using JVC measurement systems Frequency response30 - 16,000 Hz DistortionLess than 4% (at 1 kHz) Transmitter (J22176-001 : J/C Model, J22176-002 : G Model) Power requirementsD

3、C 7.5 V (with the exclusive AC adaptor J47310-001 (J/C Model) / J47311-001 (G Model) Audio input terminal3.5 mm dia. stereo mini jack,RCA pin jack 2 Input impedance27k Reference input level300 mV Dimensions197 (W) 137 (D) 121 (H) mm (7.75 5.39 4.76) (including antenna) Mass320 g (11.2 oz) (without c

4、onnection cord and AC adaptor) Headphones (HA-W1000RF) Power requirementsRechargeable Ni-MH battery (2.4 V) Battery running time35 hours (when charged for 24 hours) Mass270 g (9.52 oz) (with installed rechargeable battery) Provided Accessories Instructions 1, AC adaptor 1, Connection cord 1 (3.5 mm

5、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) RadioFans.CN 收音机爱 好者资料库 1-2 (No.XC010) SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this product contains special hardware and

6、many circuits and components specially for safety purpos- es. 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 per- formed by qua

7、lified 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 perso

8、nal injury or property damage resulting therefrom. (3) Many electrical and mechanical parts in the products have special safety-related characteristics. These characteris- tics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by us- ing rep

9、lacement components rated for higher voltage, watt- age, etc. Replacement parts which have these special safety characteristics are identified in the Parts List of Ser- vice Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in

10、 the Service Manual. The use of a substitute replacement which does not have the same safety charac- teristics 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, clam

11、ps, 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 hav

12、e been returned to normal, after reassem- bling. (5) Leakage shock hazard testing After reassembling the product, always perform an isola- tion check on the exposed metal parts of the product (an- tenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure th

13、e 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, particular- ly any e

14、xposed metal part having a return path to the chassis, to a known good earth ground. Any leakage cur- rent 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, 1,000 per volt or more sensitivity in the following mann

15、er. Connect a 1,500 10W resistor paralleled by a 0.15F 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 havin

16、g 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.). 1.2Warning (1) This equipment has been designed and man

17、ufactured 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 ap

18、proved parts. (5) If mains voltage selector is provided, check setting for local voltage. 1.3Caution Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of pre- forming repair of this system. 1.4Critical parts for safety In re

19、gard 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

20、the same type and rating as specified by the manufacturer. (This regulation dose not Except the J and C version) Good earth ground Place this probe on each exposed metal part. AC VOLTMETER (Having 1000 ohms/volts, or more sensitivity) 1500 10W 0.15 F AC TYPE RadioFans.CN 收音机爱 好者资料库 (No.XC010)1-3 SEC

21、TION 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) (1) Remove the one screw A and two screws B attaching the housing L assy (2) Disconnect the connector of

22、 rechargeable battery from switch P.C.B.assy. (3) Remove the two screws C attaching the switch P.C.B.assy. (4) Remove the three screws D attaching the housing R. (5) Remove the two screws E attaching the main P.C.B.assy. (6) Remove the two headband spring F attaching the elastic band for L and R res

23、pectively. (7) Remove the two screws G attaching the speaker holder assy for L and R respectively. (8) A ear pad and a speaker pad on either side are removed. (9) A drive unit is removed from a speaker holder, pressing down three hooks. (10) Remove the four screws H attaching the headband assy, and

24、remove it. Main P.C.B. Assy R L a a a b b b b a Headband assy Elastic band F F Housing L assy Housing R Speaker pad Speaker pad Ear pad Ear pad Drive unit Drive unit Speaker holder Speaker holder Rechargeable battery B A H H C E E D D Switch P.C.B. Assy Charge P.C.B. Assy G G RadioFans.CN 收音机爱 好者资料库

25、 1-4 (No.XC010) SECTION 3 TROUBLESHOOTING 3.1Measurement Condition AC IN TransmitterReceiver (Headphones) Reference input signal:1kHz 300mVp-p sine wave Hedaphone volume control: MAX MIN POWER / CHARGE WOW OFF SURROUND LEVEL MAX TruBass VOL Distance : 1m (3.28ft) (No.XC010)1-5 (No.XC010) AV & MULTIMEDIA COMPANY ACCESSORIES CATEGORY 1644, Shimotsuruma, Yamato, Kanagawa 242-8514, Japan VICTOR COMPANY OF JAPAN, LIMITED WPC Printed in Japan