Jvc-RVNB-50-B-Service-Manual电路原理图.pdf
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1、SERVICE MANUALCOPYRIGHT 2010 Victor Company of Japan, LimitedNo.MB7232010/4POWERED WOOFER CD SYSTEMMB72320104SERVICE MANUALRV-NB50B, RV-NB50E, RV-NB50EN, RV-NB50EV, RV-NB51WE, RV-NB51WEN, RV-NB51WEV, RV-NB52BB, RV-NB52BE, RV-NB52BEN, RV-NB52BEV, RV-NB50J, RV-NB50C, RV-NB50US, RV-NB50A, RV-NB52BJCOPY
2、RIGHT 2010 Victor Company of Japan, LimitedLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3、. . . 1-32 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4、. . . . 1-54 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-95 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5、 . . . . . . . . . . 1-91-2 (No.MB723)SPECIFICATIONDesigns & specifications are subject to change without notice.Disc playerCD capacity 1CDSignal-to-noise ratio 85 dBDynamic range 90 dBTunerFM tuning range 87.50 MHz - 108.00 MHzAntenna FM telescopic antennaGeneralSpeakers Full range 8 cm (3 3/16”) c
6、one 2Speaker impedance 16 Super woofer 13 cm (5 1/8”) cone 2Speaker impedance 7 Output power 40 WInput terminal USB Playable files MP3, WMACompatible device Mass storage classOutput power DC 5 V 500 mADock for iPod DC 5 V 500 mADC IN DC 12 VOutput terminal PHONES (3.5) 1Power supply AC 230 V , 50 Hz
7、 (Europe)AC 120 V , 60 Hz (Northern America)AC 240 V , 50 Hz (Australia)AC 110 V - 240V , 50 Hz/60 Hz (Other area)DC 15 V (R20 (SUM-1)/D (13D)-size batteries 10)External DC 12 V (Car battery via the optional car adapter)Power consumption When using an AC outlet 28 W (at operation)1 W (on standby)Ext
8、ernal DC 12 V 2 A (power on mode)Dimensions 666 mm (26 1/4”) 231 mm (9 1/8”) 240 mm (9 1/2”) (W/H/D)Mass Approx. 6.8 kg (15.0 lds) (without batteries stored in the battery compartment)(No.MB723)1-3SECTION 1PRECAUTION1.1 Safety Precautions(1) This design of this product contains special hardware andm
9、any circuits and components specially for safety purpos-es. For continued protection, no changes should be madeto the original design unless authorized in writing by themanufacturer. Replacement parts must be identical tothose used in the original circuits. Services should be per-formed by qualified
10、 personnel only.(2) Alterations of the design or circuitry of the product shouldnot be made. Any design alterations of the product shouldnot be made. Any design alterations or additions will voidthe manufacturers warranty and will further relieve themanufacture of responsibility for personal injury
11、or propertydamage resulting therefrom.(3) Many electrical and mechanical parts in the products havespecial safety-related characteristics. These characteris-tics are often not evident from visual inspection nor can theprotection afforded by them necessarily be obtained by us-ing replacement componen
12、ts rated for higher voltage, watt-age, etc. Replacement parts which have these specialsafety characteristics are identified in the Parts List of Ser-vice Manual. Electrical components having such featuresare identified by shading on the schematics and by ( ) onthe Parts List in the Service Manual. T
13、he use of a substitutereplacement which does not have the same safety charac-teristics as the recommended replacement parts shown inthe Parts List of Service Manual may create shock, fire, orother hazards.(4) The leads in the products are routed and dressed with ties,clamps, tubings, barriers and th
14、e like to be separated fromlive parts, high temperature parts, moving parts and/orsharp edges for the prevention of electric shock and firehazard. When service is required, the original lead routingand dress should be observed, and it should be confirmedthat they have been returned to normal, after
15、reassem-bling.(5) Leakage shock hazard testingAfter 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 the productis safe to operate without dan
16、ger of electrical shock.Do notuse 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 currentfrom each exposed metal parts of the cabinet, particular-ly any exposed metal part having a return path to
17、thechassis, to a known good earth ground. Any leakage cur-rent must not exceed 0.5mA AC (r.m.s.). Alternate check methodPlug the AC line cord directly into the AC outlet. Use anAC voltmeter having, 1,000 per volt or more sensitivityin the following manner. Connect a 1,500 10W resistorparalleled by a
18、 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 ACvoltmeter. Move the resistor connection to each exposed metalpart, particularly any exposed metal part having a returnpath to the chassis, and measure the AC vo
19、ltage acrossthe resistor. Now, reverse the plug in the AC outlet andrepeat each measurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). 1.2 Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is
20、 the legal responsibility of the repairer to ensure thatthese safety standards are maintained.(3) Repairs must be made in accordance with the relevantsafety standards.(4) It is essential that safety critical components are replacedby approved parts.(5) If mains voltage selector is provided, check se
21、tting for localvoltage.1.3 CautionBurrs formed during molding may be left over on some partsof the chassis. Therefore, pay attention to such burrs in the case of pre-forming repair of this system.1.4 Critical parts for safetyIn regard with component parts appearing on the silk-screenprinted side (pa
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