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

22、rts side) of the PWB diagrams, the parts that areprinted over with black such as the resistor ( ), diode ( )and ICP ( ) or identified by the “ “ mark nearby are criticalfor safety. When replacing them, be sure to use the parts of thesame type and rating as specified by the manufacturer. (This regula

23、tion dose not Except the J and C version)Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE1-4 (No.MB723)1.5 Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored

24、 in the body, fabric, etc. is discharged, can destroy the laserdiode in the traverse unit (optical pickup). Take care to prevent this when performing repairs.1.5.1 Grounding to prevent damage by static electricityStatic electricity in the work area can destroy the optical pickup (laser diode) in dev

25、ices such as laser products. Be careful to use proper grounding in the area where repairs are being performed. (1) Ground the workbenchGround the workbench by laying conductive material (such as a conductive sheet) or an iron plate over it before placing thetraverse unit (optical pickup) on it.(2) G

26、round yourselfUse an anti-static wrist strap to release any static electricity built up in your body. (3) Handling the optical pickup In order to maintain quality during transport and before installation, both sides of the laser diode on the replacement opticalpickup are shorted. After replacement,

27、return the shorted parts to their original condition. (Refer to the text.) Do not use a tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easilydestroy the laser diode. 1.6 Handling the traverse unit (optical pickup)(1) Do not subject the t

28、raverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit. (2) Cut off the shorted part of the flexible cable using nippers, etc. after replacing the optical pickup. For specific details, refer to thereplacement procedure in the text. Remove the anti-static pin when replacin

29、g the traverse unit. Be careful not to take too long atime when attaching it to the connector. (3) Handle the flexible cable carefully as it may break when subjected to strong force. (4) I t is not possible to adjust the semi-fixed resistor that adjusts the laser power. Do not turn it.1MConductive m

30、aterial(conductive sheet) or iron palate(caption)Anti-static wrist strap(No.MB723)1-5SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.SECTION 3DISASSEMBLY3.1 Main body (Used figure were RV-NB50E)3.1.1 Removing the Punching panel (See Fig.1)(1)

31、 Remove the twelve screws A attaching the both side of thePunching panel.Fig.13.1.2 Removing the Rear cabinet (See Fig.2, 3, 4, 5)(1) Remove the four screws B attaching the both side of theSubwoofer. (See Fig.2)Fig.2(2) Remove the ten screws C attaching the Rear cabinet. (SeeFig.3)(3) Remove the two

32、 screws D attaching the CD mechanism.(See Fig.3)Fig.3(4) Disconnect the connector wire from Power supply boardconnected to connector CN101 of the Main board. (SeeFig.4)Fig.4AABCCCDCN1011-6 (No.MB723)(5) Disconnect the connector wire from Power supply boardconnected to connector CN301 of the Main boa

33、rd. (SeeFig.5)Fig.53.1.3 Removing the SMPS board (See Fig.6, 7)(1) Remove the two screws E attaching the SMPS board. (SeeFig.6)Fig.6(2) Disconnect the connector wires from Power supply boardconnected to connectors of SMPS board. (See Fig.7)Fig.73.1.4 Removing the Power supply board (See Fig.8)(1) Re

34、move the two screws F and two screws G attaching thePower supply board.Fig.83.1.5 Removing the CD mechanism (See Fig.9, 10, 11, 12)(1) Disconnect the connector wire from Left speaker connect-ed to connector CN102 of the Main board. (See Fig.9)Fig.9(2) Disconnect the connector wire from Right speaker

35、 con-nected to connector CN103 of the Main board. (See Fig.10)Fig.10CN301EconnectorFGCN102CN103(No.MB723)1-7(3) Disconnect the card wire from Main board connected toconnector CN450 of the iPod board. (See Fig.11)(4) Disconnect the connector wire from Right key board con-nected to connector CN303 of

36、the Main board. (See Fig.11)(5) Disconnect the connector wire from USB board connectedto connector CN201 of the Main board. (See Fig.11)(6) Disconnect the connector wire from Left key board con-nected to connector CN301 of the Main board. (See Fig.11)Fig.11(7) Disconnect the connector wire from LCD

37、board connectedto connector CN304 of the Main board. (See Fig.12)Fig.123.1.6 Removing the Main board (See Fig.13, 14, 15, 16)(1) Disconnect the card wire from pickup connected to connec-tor CN701 of the Main board. (See Fig.13)Fig.13(2) Disconnect the connector wire from Main board connectedto conne

38、ctor of the Mechanism board. (See Fig.14)Fig.14(3) Disconnect the connector wire from Door switch board con-nected to connector CN305 of the Main board. (See Fig.15)Fig.15(4) Remove the four screws H attaching the Main board. (SeeFig.16)Fig.16CN450CN301CN303CN201CN304CN701connectorCN305HH1-8 (No.MB7

39、23)3.1.7 Removing the iPod board (See Fig.17)(1) Remove the two screws J attaching the iPod board.Fig.173.1.8 Removing the LCD board (See Fig.18)(1) Remove the three screws K attaching the LCD board.Fig.183.1.9 Removing the Front panel (See Fig.19)(1) Disconnect the connector wire from Right key boa

40、rd con-nected to connector CN407 of the Volume board.(2) Disconnect the connector wire from Left key board con-nected to connector CN408 of the Volume board.(3) Remove the four screws L attaching the Front panel.(4) Disengage four hooks a engaged Front panel.Fig.193.1.10 Removing the Key board (See

41、Fig.20)(1) Remove the twelve screws M attaching the Key boards.Fig.203.1.11 Removing the Right speakers (See Fig.21, 22, 23)(1) Remove the two screws N attaching the Woofer, (SeeFig.21)Fig.21(2) Remove the four screws P attaching the Speaker cover.(See Fig.22)Fig.22JK KLLCN407 CN408hook ahook aMMMNP

42、P(No.MB723)1-9(3) Remove the four screws Q attaching the Main speaker.(See Fig.23)Fig.233.1.12 Removing the Left speaker(1) Left speaker removing method as follow the 3.1.11 Re-moving the Right speakers.SECTION 4ADJUSTMENTThis service manual does not describe ADJUSTMENT.SECTION 5TROUBLESHOOTINGThis service manual does not describe TROUBLESHOOTING.QQ(No.MB723)VSEPrinted in JapanVictor Company of Japan, LimitedHome Entertainment Business Division Personal AV Operation 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan