JVC-EXD1-cs-sm维修电路原理图.pdf
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1、SERVICE MANUAL COPYRIGHT 2005 Victor Company of Japan, Limited No.MB399 2005/6 COMPACT COMPONENT SYSTEM MB39920056 EX-D1 Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS 1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
2、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3 2SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7 3DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8 4ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25 5TROUBLESHOOTING . . . . . . . . . . . . . . . . .
4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-35 CA-EXD1SP-EXD1SP-EXD1 Area suffix B - U.K. E - Continental Europe EN - Northern Europe EV - Eastern Europe EE - Russian Federation RadioFans.CN 收音机爱 好者资料库 1-2 (No.MB399) SPECIFICATION Designs and Spe
5、cifications are subject to change without notice. GeneralPower sourceAC 230 V , 50 Hz Power consumption25 W (in operation) 1.0 W (on standby) Weight3.0 kg External dimensions (W H D)150 mm 152 mm 246 mm DVD playerPlayable discsDVD VIDEO, DVD AUDIO, VCD, SVCD, CD, CD-R/RW (CD, VCD, MP3, WMA, JPEG for
6、mat), DVD-R/-RW (video format) Video output Color systemPAL Horizontal resolution500 lines Composite 11.0 V (p-p)/75 , synchronization negative S-video 1Y output: 1.0 V (p-p)/75 , synchronization negative C output: 0.3 V (p-p)/75 Component 1Y output: 1.0 V (p-p)/75 , synchronization negative PB/PR o
7、utput: 0.7 V (p-p)/75 Audio output Analog sound output Speakers 2Output power (IEC 268-3): 36 W (18 W+18 W) at 4 (10% THD) Fitting impedance: 4 to 16 Headphones 111 mW/32 Fitting impedance: 16 to 1 k Subwoofer 1500 mVrms/10 k Digital sound outputOptical 1-21 dBm to -15 dBm Audio inputSound inputAUX
8、1 400 mV/50 k USB AUDIO 1 TunerFM tunerReceiving frequency 87.50 MHz to 108.00 MHz Antenna75 - Unbalanced type AM (MW) tunerReceiving frequency 522 kHz to 1 629 kHz AntennaExternal antenna jack (loop antenna) SpeakerTypeFull range 1-way bass-reflex type Magnetically shielded type Speaker8cm cone 1 F
9、requency response55 to 20 000 Hz Power handling capacity30 W Impedance4 Sound pressure level80 dB/W m Dimension (W H D)120 mm 151 mm 241 mm Weight1.8 kg each RadioFans.CN 收音机爱 好者资料库 (No.MB399)1-3 SECTION 1 PRECAUTION 1.1Safety Precautions (1) This design of this product contains special hardware and
10、 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 qu
11、alified 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 pers
12、onal 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 re
13、placement 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 i
14、n 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, cla
15、mps, 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 ha
16、ve 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 t
17、he 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
18、exposed 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 man
19、ner. 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 havi
20、ng 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 ma
21、nufactured 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 a
22、pproved 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 r
23、egard 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
24、 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 1-4 (No.MB399) 1.5 Safety Precautions (U
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