Jvc-HAW-600-RF-Service-Manual 电路图 维修手册.pdf

《Jvc-HAW-600-RF-Service-Manual 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Jvc-HAW-600-RF-Service-Manual 电路图 维修手册.pdf（6页珍藏版）》请在收音机爱好者资料库上搜索。

1、SERVICE MANUAL COPYRIGHT 2006 Victor Company of Japan, Limited No.XC048 2006/7 FM CORDLESS HEADPHONES XC04820067 HA-W600RF-J/C/G/B SPECIFICATION Design and specifications subject to change without notice. General Specifications SystemRadio Frequency (UHF stereo) ModulationFrequency modulation Carrie

2、r frequency912.0 / 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 response25 - 13,000 Hz DistortionLess than 3% (at 1 kHz) Transmitter (J22320-001

3、: J/C Model, J22321-001 : G/B Model) Power requirementsDC12V(with the exclusive AC adaptor J34675-001(J/C Model)/J34676-001(G Model)/J34677-001(B Model) Audio input terminal3.5 mm dia. stereo mini jack Input impedance36k Reference input level350 mV Dimensions159 (W) 114 (D) 123 (H) mm (6.26 4.49 4.8

4、4) Mass280 g (9.9 oz) (without connection cord and AC adaptor) Headphones (HA-W600RF) Power requirementsRechargeable Ni-MH battery (1.2V) 2 Battery running time10 hours (when charged for 30 hours) Mass250 g (8.8 oz) (with installed rechargeable battery) Provided Accessories Instructions 1, AC adapto

5、r 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

6、 phone plug) Model No.Model No. J/C Model 900MHz G/B Model 863MHz RadioFans.CN 收音机爱 好者资料库 1-2 (No.XC048) SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this product contains special hardware and many circuits and components specially for safety purpos- es. For continued protection, no

7、 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 qualified personnel only. (2) Alterations of the design or circuitry of the product should no

8、t 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 part

9、s 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 replacement components rated for higher voltage, watt- age, etc. Replacement parts which have

10、 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 the Service Manual. The use of a substitute replacement which does not have the same safe

11、ty 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, clamps, tubings, barriers and the like to be separated from live parts, high temperature parts

12、, 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 reassem- bling. (5) Leakage shock hazard testing After re

13、assembling 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 the product is safe to operate without danger of electrical shock.Do not use a line isolatio

14、n 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 exposed metal part having a return path to the chassis, to a known good earth ground. Any l

15、eakage 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 manner. Connect a 1,500 10W resistor paralleled by a 0.15F AC-type capacitor between an ex- po

16、sed 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, rever

17、se 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 manufactured to meet international safety standards. (2) It is the legal responsibility of th

18、e 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.

19、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 regard with component parts appearing on the silk-screen printed side (parts side) of the PW

20、B 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 Excep

21、t 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.XC048)1-3 SECTION 2 DISASSEMBLY Transmitter In case of some problems arise in this transmitter unit, ha

22、ve to change the transmitter unit itself, due to avoid the law of radio reg- ulation. Receiver (Headphones) Remove the driver unit assy (R) and power P.C.B. assy (1) Ear pad and battery cover are removed. (2) Remove the three screws A attaching the driver unit assy (R). (3) Remove the two screws B a

23、ttaching the power P.C.B. assy. (4) The solder of each wire connected with driver unit assy (R) and power P.C.B. assy is removed. * Please confirm that it is in the ditch where battery contact (four places) on the power P.C.B assy exists in housing (R) when you install the power P.C.B. assy in housi

24、ng (R). Remove the driver unit assy (L) and main P.C.B. assy (1) Ear pad is removed. (2) Remove the three screws C attaching the driver unit assy (L). (3) Remove the two screws D attaching the main P.C.B. assy. (4) The solder of each wire connected with driver unit assy (L) and main P.C.B. assy is r

25、emoved. R L Power P.C.B. Assy Driver unit assy (R) Driver unit assy (L) Hanger (R) Hanger cover (R) Hanger cover (L) End pin End pin Sub band assy Head band E E Main P.C.B. Assy Housing (R) Battery contact Battery contact Hanger (L) B B C C D D Battery cover Ear pad Ear pad A A RadioFans.CN 收音机爱 好者资

26、料库 1-4 (No.XC048) Remove the sub band assy (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 assy Prior to performing the following procedure, remove the driver unit assy (L/R), power P.C.B. assy, main P.C.B. assy, sub band

27、 assy. (1) Head band assy is removed while drawing out the wire from ditches that exist in hanger (L/R) and head band assy. (No.XC048)1-5 SECTION 3 TROUBLESHOOTING 3.1Measurement Condition AC IN Transmitter Receiver (Headphones) Reference input signal:1kHz 350mVp-p sine wave Hedaphone volume control: MAX Distance : 1m (3.28ft) (No.XC048) ACCESSORIES CATEGORY 1644, Shimotsuruma, Yamato, Kanagawa 242-8514, Japan Victor Company of Japan, Limited VPT Printed in Japan