JVC-RXD212B-avr-sch 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2006 Victor Company of Japan, LimitedNo.MB5252006/5AUDIO/VIDEO CONTROL RECEIVERMB52520065RX-D211SJ,RX-D212BJ,RX-D212BCLead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)TABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-145TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15RadioFans.CN 收音机爱 好者资料库1-2 (No.MB525)SPECIFICATION* 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 20 Hz to 20 kHz with no more than 0.8% total har-monic distortion.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, VCR, DBS, TV300 mV/47 kAudio Input (DIGITAL IN)*Coaxial: 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)USBUSB DIGITALAudio Output LevelDVR, VCR300 mVSignal-to-Noise Ratio (66 IHF/78 IHF)80 dB/70 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) : 0.286 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) : 0.286 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 Range87.5 MHz to 108.0 MHzUsable SensitivityMonaural12.8 dBf (1.2 V/75 )50 dB Quieting SensitivityMonaural16.0 dBf (1.7 V/75 )Stereo37.5 dBf (20.5 V/75 )Stereo Separation at REC OUT35 dB at 1 kHzAM tunerTuning Range530 kHz to 1 710 kHzGeneralPower RequirementsAC 120 V , 60 HzPower Consumption150 W/200 VA (at operation)0.9 W (in standby mode)Dimensions (W H D)435 mm 91.5 mm 360 mm(17 3/16 inches 3 5/8 inches 14 3/16 inches)Mass6.7 kg (14.8 lbs)RadioFans.CN 收音机爱 好者资料库(No.MB525)1-3SECTION 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 TYPE1-4 (No.MB525)1.5Importance admistering point on the 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 symbol mark (This symbol means fast blow type fuse.)FOR CONTINUED PROTECTION AGAINST RISKOF FIRE, REPLACE ONLY WITH SAME TYPEAND RATING OF FUSES ;should be read as follows ;F101 : 2A 125VF102 : 2A 125V F103 : 6.3A 125VF101 : 2A 125VF102 : 2A 125V F103 : 6.3A 125VFull Fuse Replacement MarkingFUSE CAUTIONLe symbole graphique (Ce symbole signifiefusible de type a fusion rapide.)POUR UNE PROTECTION CONTINUE CONTREDES RISQUES DINCENDIE, REMPLACERSEULEMENT PAR UN FUSIBLE DU MEME TYPE ;Marquage Pour Le RemplacementComplet De FusiblePRECAUTIONS SUR LES FUSIBLESdoit etre interprete comme suit ;(No.MB525)1-5SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.1-6 (No.MB525)SECTION 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 sixscrews B attaching the top cover. (See Fig.2)(3) Remove the top cover in the direction of the arrow. (SeeFig.1)Fig.13.1.2Removing the tuner (See Fig.3) Remove the top cover.(1) From the top side of the main body, disconnect the cardwire from the connector CN1 on the tuner.(2) From the back side of the main body, remove the twoscrews C attaching the tuner to the rear panel and thentake out the tuner.3.1.3Removing the XM board (See Fig.3) Remove the top cover.Reference:Remove the tie band bundling the wires.(1) From the back side of the main body, remove the twoscrews D from the rear panel.(2) From the top side of the main body, disconnect the wirefrom the connector CN662 on the DSP board.(3) Disconnect the card wire from the connector CN538 on theXM board.(4) Take out the XM board from the main body.Fig.3ATop coverDCTunerDSP boardXM boardCN1CN662CN538Rear panel(No.MB525)1-73.1.4Removing the fan motor (See Fig.4) Remove the top cover.Reference:Remove the tie band bundling the wires.(1) From the top side of the main body, disconnect the wirefrom the connector CN103 on the main amplifier board.(2) Remove the three screws E and take out the fan motor as-sembly.(3) Remove the two screws F attaching the fan motor to the fanbracket.3.1.5Removing the AV compulink board (See Fig.4) Remove the top cover.(1) From the top side of the main body, disconnect the wirefrom the connector CN531 on the AV compulink board.(2) From the back side of the main body, remove the screw Gand take out the AV compulink board.Fig.43.1.6Removing the rear panel (See Fig.5) Remove the top cover, tuner, XM board and AV compulinkboard.(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 two screws H attaching the rear panel.(3) Take out the rear panel from the main body.Fig.5Fan motorFFGRear panelCN531AV compulink boardFan motorCN103Main amplifier boardFan bracketEStrain reliefHRear panelPower cordHH1-8 (No.MB525)3.1.7Removing the DSP board (See Fig.6) Remove the top cover, tuner, XM board, AV compulink boardand rear panel.(1) From the top side of the main body, remove the screw J at-taching the DSP board.(2) Disconnect the connectors (CN661, CN683) on the DSPboard from the volume board.Note:When removing the DSP board, take care not to breakthe claw of the connector on it.(3) Take out the DSP board and disconnect the wires from theconnector CN681 on the forward side of the DSP board.(4) Take out the DSP board from the main body.3.1.8Removing the video board (See Fig.6) Remove the top cover, tuner, XM board, AV compulink boardand rear panel.(1) From the top side of the main body, disconnect the wirefrom the connector CN533 on the video board.(2) Disconnect the connector CN525 on the video board fromthe connect board.(3) Take out the video board from the main body.Fig.63.1.9Removing the speaker terminal 1 and 2 board (See Fig.7) Remove the top cover, tuner, XM board, AV compulink boardand rear panel.(1) From the top side of the main body, disconnect the wiresfrom the connectors (CN261, CN461) on the speaker ter-minal 1 board.(2) Disconnect the wires from the connectors (CN205, CN262,CN263) on the speaker terminal 2 board.(3) Take out the speaker terminal 1 and 2 board from the mainbody.Fig.73.1.10 Removing the power transformer (See Fig.8) Remove the top cover.Reference:Remove the tie bands bundling the wires.(1) From the top side of the main body, disconnect the wiresfrom the connector CN121 on the primary board.(2) Disconnect the wires from the connector CN106 on theregulator board.(3) Disconnect the wires from the connector CN111 on themain amplifier board.(4) Remove the four screws K and take out the power trans-former from the main body.Fig.8CN533CN525Video boardCN681DSP boardVolume boardConnect boardCN661CN683JCN263CN261CN461CN205CN262Speaker terminal 2 boardSpeaker terminal 1 boardCN111CN106Power transformerPrimary boardRegulator boardMain amplifier boardKCN121(No.MB525)1-93.1.11 Removing the primary board (See Fig.9) Remove the top cover.Reference:Remove the tie band bundling the wires.(1) From the top side of the main board, remove the wires fromthe connectors (CN120, CN121) on the primary board.(2) Disconnect the wires from the connector CN102 on theregulator board.(3) Remove the two screws M attaching the primary board.(4) Take out the primary board from the main body.3.1.12 Removing the regulator board (See Fig.9) Remove the top cover and video board.Reference:Remove the tie band bundling the wires.(1) From the top side of the main board, remove the wires fromthe connectors (CN106, CN102, CN122) on the regulatorboard.(2) Disconnect the wires from the connectors (CN506, CN507)on the input board.(3) Disconnect the wire from the connector CN105 on the mainamplifier board. (4) Remove the four screws N attaching the regulator board.(5) Take out the regulator board from the main body.Fig.9CN120CN122CN106CN102CN506CN507Main amplifier boardInput boardPrimary boardMNNNMCN121CN111CN105Regulator board1-10 (No.MB525)3.1.13 Removing the volume board (See Fig.10) Remove the top cover, tuner, XM board, AV compulink board,rear panel, DSP board and video board.(1) From the top side of the main body, disconnect the connec-tor CN413 on the main amplifier board from the volumeboard.(2) Disconnect the connector CN503 on the input board fromthe volume board and then take out the volume board