Jvc-NXT-5-Service-Manual电路原理图.pdf

SERVICE MANUALCOPYRIGHT © 2010 Victor Company of Japan, LimitedNo.MB7442010/5COMPACT COMPONENT SYSTEMMB74420105SERVICE 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 CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-73 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-115 TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11CA-NXT5SP-NXT5F SP-NXT5F SP-NXT5W1-2 (No.MB744)SPECIFICATIONMain unit-CA-NXT5Input/outputHDMI output HDMI OUTUSB terminal USB MEMORY PLAYAnalog audio input AUDIO IN 500 mV/50 kDigital audio input DIGITAL IN (OPTICAL) -21 dBm to -15 dBm (660 nm±30 nm)Analog video output VIDEO OUT Color system PALComposite video, 1 V(p-p)/75TunerFM tuning range 87.50 MHz - 108.00 MHzDisc playerPlayable disc DVD 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 range 80 dBHorizontal resolution 500 linesWow and flutter ImmeasurableUSBPlayable files MP3/JPEG/MPEG-1/MPEG-2/DivX formatUSB specification Compatible with USB 2.0 Full SpeedCompatible device Mass storage classCompatible system FAT16, FAT32Bus power supply DC 5 V 500 mAHDMIVideo resolution 576p, 720p, 1080i, 1080pOutput power (HDMI OUT) DC 5 V 55 mAGeneralMass (approx.) 2.3 kgDimensions (approx.) Placed vertically A: 240 mm B: 420 mm C: 64 mm D: 70 mm E: 134 mmPlaced horizontally F: 420 mm G: 70 mm H: 240 mmSubwoofer-SP-NXT5WOutput power Front 100 W (50 W + 50 W) at 6 (10% THD)Subwoofer 100 W at 3 (10% THD)Speaker Bass reflex type 16 cm cone x 1Power handling capacity 100 WFrequency range 40 Hz - 150 HzSound pressure level 77 dB/W · mGFHCDEAB(No.MB744)1-3Design and specifications are subject to change without notice.Power requirements AC 230 V , 50 HzPower consumption 40 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-NXT5FSpeaker 1 way bass reflex type 8 cm cone x 1Impedance 6 Power handling capacity 50 WFrequency range 75 Hz - 20 kHzSound pressure level 82 dB/W · mMass (approx.) 0.83 kg eachDimensions (approx.) 100 mm × 240 mm × 128 mm (W/H/D)1-4 (No.MB744)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.MB744)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.1MConductive material(conductive sheet) or iron palate(caption)Anti-static wrist strap1-6 (No.MB744)1.7 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.MB744)1-7SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.SECTION 3DISASSEMBLY3.1 Main body (Used model: NX-T5E)3.1.1 Removing 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.3.1.2 Removing 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.43.1.3 Removing 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)3.1.4 Removing 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.63.1.5 Removing 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.83.1.6 Removing 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.93.1.7 Removing 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.11CON403CON402EEFSCON1CON703SCON2 CN702CON101CON301 CON201GHJMMJKCON603MTCON1(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)3.2 Subwoofer (Used model: SP-NXT5WE)3.2.1 Removing 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.33.2.2 Removing 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.73.2.3 Removing 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.83.2.4 Removing 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.10FGGGCON902 CON901CON01HJJ