Jvc-NXD-4-A-Service-Manual电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2010 Victor Company of Japan, LimitedNo.MB7262010/2COMPACT COMPONENT SYSTEMMB72620102SERVICE 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 in the board (material : Sn-Cu, melting point : 230 Centigrade)TABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-165 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17except NX-D4ASP-NXD3SP-NXD3 CA-NXD41-2 (No.MB726)SPECIFICATIONNX-D4 for EuropeAmplifier sectionOutput Power 230 W (115 W + 115 W) at 3 (10% THD)Audio Input AUDIO IN Stereo mini ( Ø 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/Output OPTICAL DIGITAL OUTPUT (output only) -21 dBm to -15 dBm (660 nm ± 30 nm)USB REC/PLAY (input and output)VIDEO OUT Color system PAL/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 impedance 3 - 16 Tuner sectionFM tuning range 87.50 MHz - 108.00 MHzAM (MW) tuning range 522 kHz - 1 629 kHzDisc player sectionDynamic range 80 dBHorizontal resolution 500 linesWow and flutter ImmeasurableiPod sectionPower supply DC 5 V 500 mA (each iPod dock)USB sectionUSB specification Compatible with USB 2.0 Full SpeedCompatible device Mass storage classCompatible system FAT16, FAT32Output power DC 5 V 500 mAGeneralPower requirements AC 230 V , 50 HzPower consumption 90 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-NXD3Type 3-way 3-speaker Bass Reflex Type (Magnetically-Shielded Type)Speaker units Tweeter 2.0 cm cone × 1Mid Range 5.0 cm cone × 1Woofer 16.0 cm cone × 1Impedance 3 Power handling capacity 115 WFrequency range 40 Hz - 20 000 HzSound pressure level 84 dB/W·mDimensions 205 mm × 409.5 mm × 290.5 mm (W × H × D)Mass 3.6 kg each(No.MB726)1-3NX-D4 for AAmplifier sectionOutput Power 230 W (115 W + 115 W) at 3 (10% THD)Audio Input AUDIO IN Stereo mini ( Ø 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/Output OPTICAL DIGITAL OUTPUT (output only) -21 dBm to -15 dBm (660 nm ± 30 nm)USB REC/PLAY (input and output)VIDEO OUT Color system PAL/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 impedance 3 - 16 Tuner sectionFM tuning range 87.50 MHz - 108.00 MHzAM (MW) tuning range 522 kHz - 1 629 kHzDisc player sectionDynamic range 80 dBHorizontal resolution 500 linesWow and flutter ImmeasurableiPod sectionPower supply DC 5 V 500 mA (each iPod dock)USB sectionUSB specification Compatible with USB 2.0 Full SpeedCompatible device Mass storage classCompatible system FAT16, FAT32Output power DC 5 V 500 mAGeneralPower requirements AC 240 V , 50 HzPower consumption 90 W (at operation)16 W or less (at standby)1 W or less (at ECO mode)Dimensions (approx.) 195 mm × 333 mm × 313 mm (W × H × D)Mass (approx.) 3.6 kgSystem Speaker-SP-NXD3Type 3-way 3-speaker Bass Reflex Type (Magnetically-Shielded Type)Speaker units Tweeter 2.0 cm cone × 1Mid Range 5.0 cm cone × 1Woofer 16.0 cm cone × 1Impedance 3 Power handling capacity 115 WFrequency range 40 Hz - 20 000 HzSound pressure level 84 dB/W·mDimensions 205 mm × 409.5 mm × 290.5 mm (W × H × D)Mass 3.6 kg each1-4 (No.MB726)SECTION 1PRECAUTION1.1 Safety Precautions(1) This design of this product contains special hardware andmany 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 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 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 components 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. The 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 the 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 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 danger 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 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 0.15µF 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 voltage 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 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 setting 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 (parts 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 regulation 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 TYPE(No.MB726)1-51.5 Preventing static electricityElectrostatic discharge (ESD), which occurs when static electricity stored 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 devices 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) Ground 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, 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 tester's internal power source can easilydestroy the laser diode. 1.6 Handling 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) 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 replacing 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.1.7 Attention when traverse unit is decomposed*Please refer to “Disassembly method“ in the text for the pickup 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 sections after connecting the card wire.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strapSolder short land section1-6 (No.MB726)1.8 Important for laser products1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiationwhen open. Do not stare into beam.(Others) Visible and/or invisible class 1M laser radiationwhen open. Do not view directly with optical instruments. 3.CAUTION : Visible and/or invisible laser radiation whenopen and inter lock failed or defeated. Avoid directexposure to beam.4.CAUTION : This laser product 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 laser is ableto 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 adjustment or operationcheck. WARNING LABEL and PRINT(No.MB726)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.SECTION 3DISASSEMBLY3.1 Main body (Used figure were NX-D4E)3.1.1 Removing the Top cover (See Fig.1, 2, 3, 4)(1) Remove the six screws 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.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)3.1.2 Removing the Rear panel (See Fig.5, 6)(1) Disconnect the connector wire from FAN connected to con-nector CN303 of the Main board. (See 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.63.1.3 Removing the Main board (See Fig.7)(1) Disconnect the card wire from Front panel connected toconnectors CN301, 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 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 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 Mic board connected toconnector CN304 of the Main board.(12) Remove the two screws D attaching the Main board.Fig.7CN303CN306CCDDCN301CN312CN309CN502CN500CN503CN310CN181CN304CN315CN307CN180(No.MB726)1-93.1.4 Removing the DVD mechanism (See Fig.8)(1) Disconnect the connector wire from USB board connectedto 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.83.1.5 Removing the Front panel (See Fig.9, 10)(1) Remove the three screws F attaching the Front panel. (SeeFig.9)(2) Disengage 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)