JVC-NXD4-cs-sm 维修电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2010 Victor Company of Japan, LimitedNo.MB7262010/2COMPACT COMPONENT SYSTEMMB72620102 SERVICE MANUALNX-D4B,NX-D4E,NX-D4ACOPYRIGHT 2010 Victor Company of Japan, LimitedLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)Lead free solder used

2、 in the board (material : Sn-Cu, melting point : 230 Centigrade)TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . .

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-165TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17except NX-D4ASP-NXD3SP-NXD3CA-NXD4RadioFans.CN 收音机爱

5、 好者资料库1-2 (No.MB726)SPECIFICATIONNX-D4 for EuropeAmplifier sectionOutput Power230 W (115 W + 115 W) at 3 (10% THD)Audio InputAUDIO INStereo mini ( 3.5 mm)500 mV/47 k (at “AUDIO LVL3”)250 mV/47 k (at “AUDIO LVL2”)125 mV/47 k (at “AUDIO LVL1”)Digital Input/OutputOPTICAL DIGITAL OUTPUT (output only)-21

6、 dBm to -15 dBm (660 nm 30 nm)USB REC/PLAY (input and output)VIDEO OUTColor systemPAL/NTSC (interlaced/progressive)VIDEO (Composite)1 V(p-p)/75 COMPONENT(Y) 1 V(p-p)/75 (PB/PR) 0.7 V(p-p)/75 Speaker impedance3 - 16 Tuner sectionFM tuning range87.50 MHz - 108.00 MHzAM (MW) tuning range522 kHz - 1 629

7、 kHzDisc player sectionDynamic range80 dBHorizontal resolution500 linesWow and flutterImmeasurableiPod sectionPower supplyDC 5 V 500 mA (each iPod dock)USB sectionUSB specificationCompatible with USB 2.0 Full SpeedCompatible deviceMass storage classCompatible systemFAT16, FAT32Output powerDC 5 V 500

8、 mAGeneralPower requirementsAC 230 V , 50 HzPower consumption90 W (at operation)1.00 W or less (at standby)Dimensions (approx.)195 mm 333 mm 313 mm (W H D)Mass (approx.)3.6 kgSystem Speaker-SP-NXD3Type3-way 3-speaker Bass Reflex Type (Magnetically-Shielded Type)Speaker unitsTweeter2.0 cm cone 1Mid R

9、ange5.0 cm cone 1Woofer16.0 cm cone 1Impedance3 Power handling capacity115 WFrequency range40 Hz - 20 000 HzSound pressure level84 dB/WmDimensions205 mm 409.5 mm 290.5 mm (W H D)Mass3.6 kg eachRadioFans.CN 收音机爱 好者资料库(No.MB726)1-3NX-D4 for AAmplifier sectionOutput Power230 W (115 W + 115 W) at 3 (10%

10、 THD)Audio InputAUDIO INStereo mini ( 3.5 mm)500 mV/47 k (at “AUDIO LVL3”)250 mV/47 k (at “AUDIO LVL2”)125 mV/47 k (at “AUDIO LVL1”)Digital Input/OutputOPTICAL DIGITAL OUTPUT (output only)-21 dBm to -15 dBm (660 nm 30 nm)USB REC/PLAY (input and output)VIDEO OUTColor systemPAL/NTSC (interlaced/progre

11、ssive)VIDEO (Composite)1 V(p-p)/75 COMPONENT(Y) 1 V(p-p)/75 (PB/PR) 0.7 V(p-p)/75 Speaker impedance3 - 16 Tuner sectionFM tuning range87.50 MHz - 108.00 MHzAM (MW) tuning range522 kHz - 1 629 kHzDisc player sectionDynamic range80 dBHorizontal resolution500 linesWow and flutterImmeasurableiPod sectio

12、nPower supplyDC 5 V 500 mA (each iPod dock)USB sectionUSB specificationCompatible with USB 2.0 Full SpeedCompatible deviceMass storage classCompatible systemFAT16, FAT32Output powerDC 5 V 500 mAGeneralPower requirementsAC 240 V , 50 HzPower consumption90 W (at operation)16 W or less (at standby)1 W

13、or less (at ECO mode)Dimensions (approx.)195 mm 333 mm 313 mm (W H D)Mass (approx.)3.6 kgSystem Speaker-SP-NXD3Type3-way 3-speaker Bass Reflex Type (Magnetically-Shielded Type)Speaker unitsTweeter2.0 cm cone 1Mid Range5.0 cm cone 1Woofer16.0 cm cone 1Impedance3 Power handling capacity115 WFrequency

14、range40 Hz - 20 000 HzSound pressure level84 dB/WmDimensions205 mm 409.5 mm 290.5 mm (W H D)Mass3.6 kg each1-4 (No.MB726)SECTION 1PRECAUTION1.1Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purpos-es. For continued pro

15、tection, 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 personnel only.(2) Alterations of the design or circuitry of the product sho

16、uldnot 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 or propertydamage resulting therefrom.(3) Many electrical and mechanical part

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

18、e 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. The use of a substitutereplacement which does not have the same safety charac-

19、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 the like to be separated fromlive parts, high temperature parts, moving parts a

20、nd/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 reassem-bling.(5) Leakage shock hazard testingAfter reassembling the product,

21、 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 danger of electrical shock.Do notuse a line isolation transformer during this ch

22、eck. Plug the AC line cord directly into the AC outlet. Using aLeakage Current Tester, measure the leakage currentfrom each exposed metal parts of the cabinet, particular-ly any exposed metal part having a return path to thechassis, to a known good earth ground. Any leakage cur-rent must not exceed

23、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 0.15F AC-type capacitor between an ex-posed metal part and a known good earth

24、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 voltage acrossthe resistor. Now, reverse the plug in the AC outlet andrepeat each

25、 measurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA AC (r.m.s.). 1.2Warning(1) This equipment has been designed and manufactured tomeet international safety standards.(2) It is the legal responsibility of the repairer to ensure thatthese safety standards a

26、re 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 setting for localvoltage.1.3CautionBurrs formed during molding may be left over on

27、 some partsof the chassis. Therefore, pay attention to such burrs in the case of pre-forming repair of this system.1.4Critical parts for safetyIn regard with component parts appearing on the silk-screenprinted side (parts side) of the PWB diagrams, the parts that areprinted over with black such as t

28、he 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 regulation dose not Except the J and C version)Good earth groundPlace this probe on each exp

29、osedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE(No.MB726)1-51.5Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored in the body, fabric, etc. is discharged, can destroy the laserdiode in the traverse uni

30、t (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 devices such as laser products. Be careful to use proper grounding in the area where repair

31、s 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) Ground yourselfUse an anti-static wrist strap to release any static electricity built up

32、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, return the shorted parts to their original condition. (Refer to the text.) Do not use a

33、tester to check the condition of the laser diode in the optical pickup. The testers internal power source can easilydestroy the laser diode. 1.6Handling the traverse unit (optical pickup)(1) Do not subject the traverse unit (optical pickup) to strong shocks, as it is a sensitive, complex unit. (2) C

34、ut 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 replacing the traverse unit. Be careful not to take too long atime when attaching it to the conne

35、ctor. (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.1.7Attention when traverse unit is decomposed*Please refer to Disassembly method in the text for the pi

36、ckup unit. Apply solder to the short land sections before the card wire is disconnected from the connector on the servo board. (If the card wireis disconnected without applying solder, the pickup may be destroyed by static electricity.) In the assembly, be sure to remove solder from the short land s

37、ections after connecting the card wire.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strapSolder short land section1-6 (No.MB726)1.8Important for laser products1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiation when o

38、pen. Do not stare into beam. (Others) Visible and/or invisible class 1M laser radiation when open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation when open and inter lock failed or defeated. Avoid direct exposure to beam.4.CAUTION : This laser pro

39、duct uses visible and/or invisible laser radiation and is equipped with safety switches which prevent emission of radiation when the drawer is open and the safety interlocks have failed or are defeated. It is dangerous to defeat the safety switches.5.CAUTION : If safety switches malfunction, the las

40、er is able to function. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified here in may result in hazardous radiation exposure. REPRODUCTION AND POSITION OF LABELS and PRINT!Please use enough caution not to see the beam directly or touch it in case of an

41、adjustment or operationcheck. WARNING LABEL and PRINT(No.MB726)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.SECTION 3DISASSEMBLY3.1Main body (Used figure were NX-D4E)3.1.1Removing the Top cover (See Fig.1, 2, 3, 4)(1) Remove the six scr

42、ews A attaching the both Side panel.(See Fig.1)Fig.1(2) Remove the six screws B attaching the both Side panel.(See Fig.2)Fig.2(3) Disconnect the card wire from iPod board connected toconnector CN400 of the Main board. (See Fig.3)(4) Disengage two hooks a engaged both side of the Top cov-er. (See Fig

43、.3)Fig.3(5) Disconnect the connector wire from Main board connectedto connector CN401 of the iPod switch board. (See Fig.4)Fig.4AABhook aCN400CN4011-8 (No.MB726)3.1.2Removing the Rear panel (See Fig.5, 6)(1) Disconnect the connector wire from FAN connected to con-nector CN303 of the Main board. (See

44、 Fig.5)(2) Disconnect the card wire from Tuner pack connected toconnector CN306 of the Main board. (See Fig.5)Fig.5(3) Remove the six screws C attaching the Rear panel. (SeeFig.6)Fig.63.1.3Removing the Main board (See Fig.7)(1) Disconnect the card wire from Front panel connected toconnectors CN301,

45、CN312 of the Main board.(2) Disconnect the parallel wire from Front panel connected toconnector CN315 of the Main board.(3) Disconnect the card wire from Loader board connected toconnector CN307 of the Main board.(4) Disconnect the connector wire from Power board connect-ed to connector CN180 of the

46、 Main board.(5) Disconnect the card wire from DVD mechanism connectedto connector CN309 of the Main board.(6) Disconnect the card wire from USB board connected toconnector CN502 of the Main board.(7) Disconnect the card wire from DVD board connected toconnector CN500 of the Main board.(8) Disconnect

47、 the card wire from Amp board connected toconnector CN503 of the Main board.(9) Disconnect the card wire from DVD board connected toconnector CN310 of the Main board.(10) Disconnect the parallel wire from Amp board connected toconnector CN181 of the Main board.(11) Disconnect the card wire from the

48、Mic board connected toconnector CN304 of the Main board.(12) Remove the two screws D attaching the Main board.Fig.7CN303CN306CCDDCN301CN312CN309CN502CN500CN503CN310CN181CN304CN315CN307CN180(No.MB726)1-93.1.4Removing the DVD mechanism (See Fig.8)(1) Disconnect the connector wire from USB board connec

49、tedto connector CN811 of the DVD board.(2) Remove the two screws E attaching the both side of theDVD mechanism.(3) Disengage two hooks b engaged both side of the DVDmechanism.Fig.83.1.5Removing the Front panel (See Fig.9, 10)(1) Remove the three screws F attaching the Front panel. (SeeFig.9)(2) Dise

50、ngage one hook c engaged Front panel. (See Fig.9)Fig.9(3) Disengage two hooks d engaged both side of the Frontpanel. (See Fig.10)Fig.103.1.6Removing the Amp board (See Fig.11)(1) Disconnect the connector wire from power board connect-ed to connector CN601 of the Amp board.(2) Remove the two screws G