JVC-RXD302B-avr-sch 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2005 Victor Company of Japan, LimitedNo.MB4792005/10AUDIO/VIDEO CONTROL RECEIVERMB479200510RX-D301S, RX-D302BLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1PRECAUTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-205TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21Area suffixRX-D301SArea suffixRX-D302BB - U.K.E - Continental EuropeEN - Northern EuropeA - AustraliaB - U.K.E - Continental EuropeEN - Northern EuropeRadioFans.CN 收音机爱 好者资料库1-2 (No.MB479)SPECIFICATION*2: Corresponding to Linear PCM, Dolby Digital, and DTS (with sampling frequency -32 kHz, 44.1 kHz, 48 kHz).Designs and specifications are subject to change without notice.AmplifierOutput Power At stereo operationFront channels110 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic dis-tortion.At surround operationFront channels110 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic dis-tortion.Center channel110 W, min. RMS, driven into 6 at 1 kHz, with no more than 0.8% total harmonic distortion.Surround channels110 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic dis-tortion.Surround back channels110 W per channel, min. RMS, driven into 6 at 1 kHz with no more than 0.8% total harmonic dis-tortion.AudioAudio Input Sensitivity/Impedance DVR/DVD (DVD MULTI), VCR, DBS, TV270 mV/47 kAudio Input (DIGITAL IN)*1Coaxial: DIGITAL IN 1(DVR/DVD)0.5 V(p-p)/75 Optical: DIGITAL IN 2(DBS), 3(VCR)-21 dBm to -15 dBm (660 nm 30 nm)USB: USB WIRELESSUSB TERMINALAudio Output LevelDVR, VCR270 mVSignal-to-Noise Ratio (66 IHF/78 IHF)80 dB/62 dBFrequency Response (6 )20 Hz to 20 kHz (1 dB)Bass Boost+4 dB 1 dB at 100 HzEqualization (at DSP operation)Center frequency63 Hz, 250 Hz, 1 kHz, 4 kHz, 16 kHzControl range8 dBVideoVideo Input Sensitivity/Impedance Composite video: DVR/DVD, VCR, DBS1 V(p-p)/75 S-video: DVR/DVD, VCR, DBSY (luminance): 1 V(p-p)/75 C (chrominance, burst): 0.3 V(p-p)/75 Component: DVR/DVD, VCR (DBS)Y (luminance): 1 V(p-p)/75 PB, PR: 0.7 V(p-p)/75 Video Output Level/ImpedanceComposite video: DVR, VCR, MONITOR OUT 1 V(p-p)/75 S-video: DVR, VCR, MONITOR OUTY (luminance): 1 V(p-p)/75 C (chrominance, burst): 0.3 V(p-p)/75 Component: MONITOR OUTY (luminance): 1 V(p-p)/75 PB, PR: 0.7 V(p-p)/75 SynchronizationNegativeFM tuner (IHF)Tuning Range87.50 MHz to 108.00 MHzUsable SensitivityMonaural12.8 dBf (1.2 V/75 ) for A version17.0 dBf (1.9 V/75 ) for Europe version50 dB Quieting SensitivityMonaural16.0 dBf (1.7 V/75 ) for A version21.3 dBf (3.2 V/75 ) for Europe versionStereo37.5 dBf (20.5 V/75 ) for A version41.3 dBf (31.8 V/75 ) for Europe versionStereo Separation at REC OUT35 dB at 1 kHzAM tunerTuning Range531 kHz to 1 710 kHz (at 9 kHz intervals)522 kHz to 1 629 kHz (at 10 kHz intervals)GeneralPower RequirementsAC 240 V ,50 Hz for A versionAC 230 V , 50 Hz for Europe versionPower Consumption180 W (at operation)5.8 W (in standby mode) for A version0.9 W (in standby mode) for Europe versionDimensions (W H D)435 mm 91.5 mm 371 mmMass6.8 kgUSB WIRELESS SYSTEMThe USB wireless transmitter supplied with this re-ceiver supports Direct Sequence Spreading Spec-trum (DSSS) using 2.4 GHz frequency band.RadioFans.CN 收音机爱 好者资料库(No.MB479)1-3SECTION 1PRECAUTIONS1.1Safety 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 TYPE1-4 (No.MB479)1.5 Safety Precautions (U.K only)(1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con-tinued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replace-ment parts must be identical to those used in the original circuits.(2) Any unauthorised design alterations or additions will void the manufacturers guarantee; furthermore the manufacturer cannotaccept responsibility for personal injury or property damage resulting therefrom.(3) Essential safety critical components are identified by ( ) on the Parts List and by shading on the schematics, and must neverbe replaced by parts other than those listed in the manual. Please note however that many electrical and mechanical parts inthe product have special safety related characteristics. These characteristics are often not evident from visual inspection. Partsother than specified by the manufacturer may not have the same safety characteristics as the recommended replacement partsshown in the Parts List of the Service Manual and may create shock, fire, or other hazards.(4) The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts,high temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service isrequired, the original lead routing and dress should be observed, and it should be confirmed that they have been returned tonormal, after re-assembling.1.5.1Warning(1) Service should be performed by qualified personnel only.(2) This equipment has been designed and manufactured to meet international safety standards.(3) It is the legal responsibility of the repairer to ensure that these safety standards are maintained.(4) Repairs must be made in accordance with the relevant safety standards.(5) It is essential that safety critical components are replaced by approved parts.(6) If mains voltage selector is provided, check setting for local voltage.Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair of this system.(No.MB479)1-51.6Caution after repairsThere are two power supply as the second power supply of the transformer.One is a power supply for power IC(3pin), and another is a power supply for the control(8pin).There are two power supply as the second power supply of the transformer.One is a power supply for power IC(3pin), and another is a power supply for the control(8pin).Please connect first of all and confirm the power supply for the control when you do the energizing examination after it completes ofthe repair.Please never do the energizing examination in a power supply of power IC alone.Moreover, when the control system breaks down, power IC is occasionally damaged.+B for power IC(3pins)+B for control section(8pins)For power IC(3pins)1-6 (No.MB479)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.(No.MB479)1-7SECTION 3DISASSEMBLY3.1Main body section3.1.1Removing the top cover (See Figs.1 and 2)(1) From the both sides of the main body, remove the fourscrews A attaching the top cover. (See Fig.1)(2) From the back side of the main body, remove the fivescrews B and screw C attaching the top cover. (See Fig.2)Reference:When removing the screw C, use a screwdriver to showas follows.TORX Driver: size T10Parts number: DR-L70(3) Remove the top cover in the direction of the arrow. (SeeFig.1.)Fig.1Fig.2ATop coverBTop coverBBCBTop coverBBCFor AustraliaFor Europe1-8 (No.MB479)3.1.2Removing the front panel assembly (See Figs.3 and 4) Remove the top cover.Reference:Remove the tie bands and wire holder bundling the wires.(1) Disconnect the card wire from the connector CN102 on themain amplifier board. (See Fig.3)(2) Disconnect the wire from the connector CN351 on the mainamplifier board. (See Fig.3)(3) Disconnect the wire from the connector CN552 on the inputboard. (See Fig.3)(4) Disconnect the wire from the connector CN661 on the vol-ume board. (See Fig.3)(5) Remove the three screws D attaching the front panel as-sembly. (See Fig.3)(6) Remove the screw D attaching the OSD connect 2 board.(See Fig.3)(7) From the bottom side of the main body, remove the fourscrews E attaching the front panel assembly. (See Fig.4)(8) Release the joints a and remove the front panel assemblyin the direction of the arrow. (See Fig.4)Fig.3Fig.4DFront panel assemblyDDOSD connect 2 boardMain amplifier boardCN351Volume boardCN552Input boardCN661For AustraliaFor EuropeDFront panel assemblyDDOSD connect 2 boardMain amplifier boardCN351Volume boardCN552Input boardCN661CN102CN102EFront panel assemblyEaa(No.MB479)1-93.1.3Removing the rear panel (See Fig.5) Remove the top cover.(1) From the back side of the main body, remove the strain re-lief from the rear panel in the direction of the arrow and re-move the power cord.(2) Remove the twenty-nine screws F attaching the rear panel.For Australia(3) Remove the thirty screws F attaching the rear panel. ForEurope(4) Remove the nut and washer attaching the coaxial connec-tor to the rear panel.Fig.5Strain reliefFRear panelPower cordFFStrain reliefFRear panelPower cordFFFor AustraliaFor EuropeFRear panelCoaxial connectorNut and washerRear panelCoaxial connectorNut and washerF1-10 (No.MB479)3.1.4Removing the tuner (See Fig.6) Remove the top cover.(1) Disconnect the card wire from the connector CN1 on thetuner.(2) From the back side of the main body, remove the twoscrews G attaching the tuner to the rear panel and take outthe tuner.3.1.5Removing the subwoofer board (See Fig.6) Remove the top cover.(1) Disconnect the wire from the connector CN524 on the sub-woofer board.(2) From the back side of the main body, remove the screw Hattaching the subwoofer board to the rear panel and takeout the subwoofer board.3.1.6Removing the front video board (See Fig.6) Remove the top cover.Reference:Remove the tie band bundling the wires.(1) Disconnect the wire from the connector CN662 on the vol-ume board(2) From the back side of the main body, remove the twoscrews J.(3) Remove the nut and washer attaching the coaxial connec-tor to the rear panel.(4) Take out the front video board from the main body.3.1.7Removing the compulink board (See Fig.6) For Australia Remove the top cover.(1) Disconnect the wire from the connector CN565 on the com-pulink board.(2) From the back side of the main body, rem