JVC-NXT5-cs-sm 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2010 Victor Company of Japan, LimitedNo.MB7442010/5COMPACT COMPONENT SYSTEMMB74420105 SERVICE MANUALNX-T5B, NX-T5E, NX-T5EN, NX-T5EV, NX-T5EECOPYRIGHT 2010 Victor Company of Japan, LimitedLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-115TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11CA-NXT5SP-NXT5FSP-NXT5FSP-NXT5WRadioFans.CN 收音机爱 好者资料库1-2 (No.MB744)SPECIFICATIONMain unit-CA-NXT5Input/outputHDMI outputHDMI OUTUSB terminalUSB MEMORY PLAYAnalog audio inputAUDIO IN 500 mV/50 kDigital audio inputDIGITAL IN (OPTICAL) -21 dBm to -15 dBm (660 nm30 nm)Analog video outputVIDEO OUTColor systemPALComposite video, 1 V(p-p)/75TunerFM tuning range87.50 MHz - 108.00 MHzDisc playerPlayable discDVD Video/CD/VCD/SVCDCD-R/CD-RW (CD/SVCD/VCD/MP3/JPEG/MPEG-1/MPEG-2/DivX format)DVD-R/-RW (DVD Video/DVDVR/MP3/JPEG/MPEG-1/MPEG-2/DivX format)+R/+RW (DVD Video/MP3/JPEG/MPEG-1/MPEG-2/DivX format)Dynamic range80 dBHorizontal resolution500 linesWow and flutterImmeasurableUSBPlayable filesMP3/JPEG/MPEG-1/MPEG-2/DivX formatUSB specificationCompatible with USB 2.0 Full SpeedCompatible deviceMass storage classCompatible systemFAT16, FAT32Bus power supplyDC 5 V 500 mAHDMIVideo resolution576p, 720p, 1080i, 1080pOutput power (HDMI OUT)DC 5 V 55 mAGeneralMass (approx.)2.3 kgDimensions (approx.)Placed verticallyA: 240 mm B: 420 mm C: 64 mm D: 70 mm E: 134 mmPlaced horizontallyF: 420 mm G: 70 mm H: 240 mmSubwoofer-SP-NXT5WOutput powerFront100 W (50 W + 50 W) at 6 (10% THD)Subwoofer100 W at 3 (10% THD)SpeakerBass reflex type 16 cm cone x 1Power handling capacity100 WFrequency range40 Hz - 150 HzSound pressure level77 dB/W mGFHCDEABRadioFans.CN 收音机爱 好者资料库(No.MB744)1-3Design and specifications are subject to change without notice.Power requirementsAC 230 V , 50 HzPower consumption40 W (at operation of the System)1.00 W or less (on standby)Mass (approx.)9.2 kgDimensions (approx.)231 mm 393 mm 370.5 mm (W/H/D)Speakers-SP-NXT5FSpeaker1 way bass reflex type 8 cm cone x 1Impedance6 Power handling capacity50 WFrequency range75 Hz - 20 kHzSound pressure level82 dB/W mMass (approx.)0.83 kg eachDimensions (approx.)100 mm 240 mm 128 mm (W/H/D)1-4 (No.MB744)SECTION 1PRECAUTION1.1Safety 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 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 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 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.). 1.2Warning(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 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.1.3CautionBurrs 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.1.4Critical 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 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.MB744)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 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 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) 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.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strap1-6 (No.MB744)1.7Important for laser products1.CLASS 1 LASER PRODUCT 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiation when open. 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 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 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 adjustment or operationcheck. WARNING LABEL and PRINT(No.MB744)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.SECTION 3DISASSEMBLY3.1Main body (Used model: NX-T5E)3.1.1Removing the DVD door(1) Connect the Main unit and Subwoofer.(2) Power to ON and then open the DVD door.(3) Slide to front side and pull up the DVD door.3.1.2Removing the Top cabinet (See Fig.1,2, 3, 4)(1) Disconnect the card wire from DVD MPEG board connect-ed to connector CNC1 and CNC5 of the Connect board.(See Fig.1)Fig.1(2) Remove the four screws A attaching the Top cabinet. (SeeFig.2)Fig.2(3) Remove the three screws B attaching the Top cabinet.(See Fig.3)Fig.3(4) Disconnect the card wire from DVD MPEG board connect-ed to connector CON401 of the Display board. (See Fig.4)Fig.43.1.3Removing the DVD mechanism (See Fig.5)(1) Remove the four screws C attaching the DVD mechanism.(2) Remove the two screws D attaching the Connect board.Fig.5CNC5CNC1ABCON401CCD1-8 (No.MB744)3.1.4Removing the Display board (See Fig.6)(1) Remove the six screws E attaching the Display board.(2) Disconnect the card wire from Key board connected to con-nector CON402 and CON403 of the Display board.Fig.63.1.5Removing the DVD MPEG board (See Fig.7, 8)(1) Remove the two screws F attaching the DVD MPEG board.(See Fig.7)Fig.7(2) Disconnect the card wire from DVD MPEG board connect-ed to connector SCON1 of the UPGRADE board. (SeeFig.8)(3) Disconnect the connector wire from DVD VCC board con-nected to connector SCON2 of the DVD MPEG board.(See Fig.8)(4) Disconnect the card wire from Main board connected toconnector CN702 of the DVD MPEG board. (See Fig.8)(5) Disconnect the connector wire from Main board connectedto connector CON101 of the DVD MPEG board. (SeeFig.8)(6) Disconnect the connector wire from USB board connectedto connector CON703 of the DVD MPEG board. (SeeFig.8)Fig.83.1.6Removing the USB board (See Fig.9)(1) Disconnect the connector wire from USB board connectedto connector CON301 of the Main board.(2) Disconnect the card wire from USB board connected toconnector CON201 of the Main board.(3) Remove the two screws G attaching the USB board.Fig.93.1.7Removing the Main board (See Fig.10, 11, 12)(1) Remove the two screws H attaching the Main board. (SeeFig.10)Fig.10(2) Remove the three screws J and two screws K attaching theDC motor. (See Fig.11)(3) Disconnect the connector wire from DC motor connected toconnector MTCON1 of the Main board. (See Fig.11)(4) Disconnect he card wire from Tuner pack connected toconnector CON603 of the Main board. (See Fig.11)Fig.11CON403CON402EEFSCON1CON703SCON2CN702CON101CON301CON201GHJMMJKCON603MTCON1(No.MB744)1-9(5) Remove the four screws L attaching the bracket. (SeeFig.12)Fig.12(6) Remove the three screws M attaching the Main board.(See Fig.11)3.2Subwoofer (Used model: SP-NXT5WE)3.2.1Removing the Power amp unit (See Fig.1, 2, 3)(1) Remove the six screws A attaching the Power amp unit.(See Fig.1)Fig.1(2) Remove the three screws B attaching the Power amp unit.(See Fig.2)Fig.2(3) Pull out the Power amp unit for half way; disconnect theconnector wire from Subwoofer speaker connected to con-nector CON805 of the Power amp board. (See Fig.3)Fig.33.2.2Removing the Power cover and Amp cover (See Fig.4,5, 6, 7)(1) Remove the five screws C attaching the Cover. (See Fig.4)Fig.4(2) Remove the three screws D attaching the Cover. (SeeFig.5)Fig.5(3) Remove the six screws E attaching the Cover. (See Fig.6)Fig.6LAABCN805CDE1-10 (No.MB744)(4) Lift up the cover; remove the two screws F attaching theCover. (See Fig.7)Fig.73.2.3Removing the Power board (See Fig.8)(1) Disconnect the power cord connected to connector CON01of the Power board.(2) Disconnect the connector wires from Amp board connect-ed to connectors CON901 and CON902 of the Powerboard.(3) Remove the eight screws G attaching the Power board.Fig.83.2.4Removing the Amp board (See Fig.9, 10)(1) Remove the four screws H attaching the Back plate. (SeeFig.9)Fig.9(2) Remove the four screws J attaching the Amp board. (SeeFig.10)Fig.10FGGGCON902CON901CON01HJJ(No.MB744)1-11SECTION 4ADJUSTMENTThis service manual does not describe ADJUSTMENT.SECTION 5TROUBLESHOOTINGThis service manual does not describe TROUBLESHOOTING.(No.MB744)VSEPrinted in JapanVictor Company of Japan, LimitedHome Entertainment Business Division Personal AV Operation 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,JapanSCHEMATIC DIAGRAMSNX-T5B,NX-T5E,NX-T5EN,NX-T5EV,NX-T5EEContentsBlock diagramsStandard schematic diagramsPrint