JVC-RX5032VSL-avr-sm 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LTD.No.220382003/4AUDIO/VIDEO CONTROL RECEIVER2203820034RX-5032VSLTABLE OF CONTENTS1Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-22Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-33Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-104Description of major ICs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-11TA/NEWS/INFODISPLAY MODESTANDBYSTANDBY/ONPHONESD I G I T A LP R O L O G I CDIMMERINPUT DIGITALRX6030VAUDIO/VIDEO CONTROL RECEIVERINPUT ANALOGMASTER VOLUMEINPUT ATTArea SuffixE - Continental EuropeEN - Northern Europe RadioFans.CN 收音机爱 好者资料库1-2 (No.22038)SECTION 1Important Safety Precautions1.1 Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purposes.For continued protection, no changes should be made to theoriginal design unless authorized in writing by the man-ufacturer. Replacement parts must be identical to thoseused 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 special safetycharacteristics are identified in the Parts List of Service Manu-al. Electrical components having such features are iden-tified by shading on the schematics and by () on theParts List in the Service Manual. The use of a substitute re-placement which does not have the same safety character-istics as the recommended replacement parts shown in theParts List of Service Manual may create shock, fire, or oth-er 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 reassembling.(5) Leakage shock hazard testing)After reassembling the product, always perform an isolationcheck on the exposed metal parts of the product (antennaterminals, knobs, metal cabinet, screw heads, headphonejack, control shafts, etc.) to be sure the product is safe tooperate without danger of electrical shock.Do not use 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 an ACvoltmeter having, 1,000 ohms per volt or more sensitivity inthe following manner. Connect a 1,500 ohm 10W resistorparalleled by a 0.15 F AC-type capacitor between anexposed 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 metal part,particularly any exposed metal part having a return path tothe chassis, and measure the AC voltage across the resistor.Now, reverse the plug in the AC outlet and repeat eachmeasurement. Voltage measured any must not exceed 0.75V AC (r.m.s.). This corresponds to 0.5 mA 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 the same typeand rating as specified by the manufacturer. (Except the JC version)RadioFans.CN 收音机爱 好者资料库(No.22038)1-3SECTION 2Disassembly method2.1 Removing the top cover (See Fig.1)(1) From the right and left sides of the main body, remove thefour screws A attaching the top cover.(2) From the back side of the main body, remove the threescrews B attaching the top cover.(3) Remove the top cover in the direction of the arrow 2 whileextending the lower sections of the top cover in the direc-tion of the arrow 1.Fig.12.2 Removing the front panel assembly (See Figs.2 and 3) Prior to performing the following procedure, remove the topcover.(1) Disconnect the card wire from the connector CN402 on theaudio board. (See Fig.2)(2) Disconnect the card wire from the connector CN201 on thepower supply board. (See Fig.2)(3) Remove the tie band and wire protection board fixing thecard wire. (See Fig.2)(4) Remove the tie band fixing the parallel wires, disconnectthe parallel wire from the connector CN403 on the audioboard. (See Fig.2)(5) Remove the three screws C attaching the front panel as-sembly. (See Fig.2)(6) From the bottom side of the main body, remove the fourscrews D attaching the front panel assembly. (See Fig.3)(7) Remove the front panel assembly in the direction of the ar-row. (See Fig.3)Fig.2Fig.3BAA211Top coverCCCFront panel assembly Card wireCN201Power supplyboardTie bandWire protectionboardCard wireCN402Audio boardCN403Tie bandDDFront panel assembly1-4 (No.22038)2.3 Removing the rear panel (See Fig.4) Prior to performing the following procedure, remove the topcover.(1) From the back side of the main body, remove the strain re-lief from the rear panel in the direction of the arrow.(2) Remove the seventeen screws E and four screws F attach-ing the rear panel.Fig.42.4 Removing the DSP board, audio input board, DVD board and video board (See Fig.5) Prior to performing the following procedure, remove the topcover and rear panel.(1) From the top side of the main body, disconnect the DSPboard from the connector CN481 on the audio board.(2) Disconnect the audio input board from the connectorCN421 on the audio board.(3) Disconnect the DVD board from the connector CN431 onthe audio board.(4) Disconnect the video board from the connector CN441 onthe audio board.Fig.52.5 Removing the tuner board (See Fig.6) Prior to performing the following procedure, remove the topcover and rear panel.(1) Disconnect the tuner board from the connectors CN411and CN412 on the audio board.Fig.6EEFEFFFStrain reliefRear panelCN481Audio boardDVD boardVideo boardCN421Audio input boardDSP boardCN431CN441Tuner boardCN411CN412Audio board(No.22038)1-52.6 Removing the audio board (See Fig.7) Prior to performing the following procedure, remove the topcover, rear panel, DSP board, audio input board, DVD board,video board and tuner board.(1) From the top side of the main body, disconnect the cardwire from the connector CN402 on the audio board.(2) Disconnect the parallel wire from the connector CN403.(3) Disconnect the relay board from the connector CN491 onthe power supply board and audio board.(4) Disconnect the wires from the connectors CN471, CN472and CN473 on the audio board.(5) Remove the three screws G attaching the audio board.(6) Loosen the screw H attaching the audio board.Fig.72.7 Removing the speaker terminal board (See Fig.8) Prior to performing the following procedure, remove the topcover and rear panel.(1) From the top side of the main body, remove the soldersfrom the soldered sections a on the speaker terminalboard.Fig.8CN491CN402Audio boardRelay boardGGCN473CN471CN472ard wireCN403Soldered sections aParallel wiresSpeaker terminal board1-6 (No.22038)2.8 Removing the main board (See Fig.9) Prior to performing the following procedure, remove the top cover.(1) From the top side of the main body, remove the tie bands fixing the wires.(2) Remove the tie band and wire protection board fixing the card wire.(3) Remove the solders from the soldered section b on the speaker terminal board attaching the parallel wires.(4) Disconnect the relay board from the connectors (CN291, CN491) on the power supply board and audio board.(5) Disconnect the parallel wire from the connector CN241 on the power supply board.(6) Disconnect the wire from the connector CN251 on the power transformer board 1.(7) Disconnect the wires from the connectors CN471, CN472 and CN473 on the audio board.(8) Remove the screw H, two screws J and four screws K attaching the main board.(9) Take out the main board.Fig.9KTie bandsTie bandWire protectionboardCN241CN251CN291Power transformerboard 1KHJKCN473CN471CN472CN491Parallel wiresPower supply boardSpeaker terminal boardSoldered section bAudio boardCard wireMain boardTie bandRelay board(No.22038)1-72.9 Removing the heat sink (See Figs.10 and 11) Prior to performing the following procedure, remove the topcover and main board.(1) Remove the ten screws L attaching the heat sink. (SeeFig.10)(2) From the reverse side of the main board, remove the twoscrews M attaching the heat sink. (See Fig.11)2.10Removing the center amp. board, front amp. boards (L/R) and rear amp. boards (L/R) (See Figs.10 and 12) Prior to performing the following procedure, remove the topcover and main board.(1) Remove the ten screws L attaching the heat sink. (SeeFig.10)(2) Remove the four screws N attaching the heat sink. (SeeFig.12)(3) Disconnect the center amp. board from the connectorCN321 on the main board. (See Fig.12)(4) Disconnect the front amp. board (L) from the connectorCN311 on the main board. (See Fig.12)(5) Disconnect the front amp. board (R) from the connectorCN312 on the main board. (See Fig.12)(6) Disconnect the rear amp. board (L) from the connectorCN331 on the main board. (See Fig.12)(7) Disconnect the rear amp. board (R) from the connectorCN332 on the main board. (See Fig.12)Fig.10Fig.11Fig.12LLHeat sinkMain boardHeat sinkMain boardMMRear amp. board (R)Front amp. board (R)Center amp. boardRear amp. board (L)Front amp. board (L)CN332CN331 CN312 CN311CN321Main boardNNHeat sink1-8 (No.22038)2.11Removing the power transformer (See Fig.13) Prior to performing the following procedure, remove the topcover.(1) From the top side of the main body, remove the tie bandsfixing the wires.(2) Remove the solders from the soldered section c on thepower transformer board 1.(3) Remove the solders from the soldered sections d on thepower transformer board 2.(4) Disconnect the wire from the connector CN251 on the pow-er transformer board 1.(5) Remove the four screws P attaching the power transform-er.2.12Removing the power/fuse board (See Fig.13) Prior to performing the following procedure, remove the topcover.(1) From the back and top sides of the main body, remove thescrew Q and screw R attaching the power/fuse board.(2) Remove the solders from the soldered sections e attachingthe power cord.(3) From the reverse side of the power/fuse board, remove thesolders from the soldered sections f attaching the wires.Fig.132.13Removing the power supply board (See Fig.14) Prior to performing the following procedure, remove the topcover.(1) From the top side of the main body, disconnect the parallelwires from the connectors CN203 and CN241 on the powersupply board.(2) Disconnect the card wire from the connector CN201 on thepower supply board.(3) Disconnect the relay board from the connector CN291 onthe power supply board.(4) Disconnect the parallel wire from the connector CN101 onthe headphone jack board and remove the tie band.(5) Remove the solders from the soldered section c on thepower transformer board 1.(6) Remove the three screws S attaching the power supplyboard.(7) Remove the power supply board from the hook g of thechassis base bracket in the direction of the arrow, take outthe power supply board.(8) Turn over the power supply board, remove the solders fromthe soldered sections h attaching the wires.2.14Removing the headphone jack board (See Figs.14 and 15) Prior to performing the following procedure, remove the topcover and front panel assembly.(1) From the top side of the main body, disconnect the parallelwire from the connector CN101 on the headphone jackboard. (See Fig.14)(2) From the front side of the main body, remove the nut andscrew T attaching the Bracket(phones) to the chassis base.(See Fig.15)Fig.14Fig.15CN251Soldered section cSoldered sections dSoldered sections eSoldered sections fTie bandTie bandPower transformerPower transformerboard 2Power cordPPRPPPower transformer board 1Power / Fuse boardQSSSCard wireCN201CN101Headphone jackboardCN241CN203Relay boardCN291Power transformer board 1Soldered section cSoldered section hHook g of thechassis base bracketParallel wiresParallel wirePower supply boardTHeadphone jack boardNutChassis baseBracket(phones)(No.22038)1-92.15Removing the system control board and power switch board (See Figs.16 and 17) Prior to performing the following procedure, remove the topcover and front panel assembly.(1) Pull out the volume and jog knobs from the front side of thefront panel assembly, remove the nut attaching the systemcontrol board. (See Fig.16)(2) From the back side of the front panel assembly, remove thenine screws U attaching the system control board. (SeeFig.17)Reference:Remove the solders of the soldered section I as re-quired.(3) Remove the solders of the soldered section i on the systemcontrol board and disconnect the parallel wire. (See Fig.17)(4) Remove the two screws V attaching the power switchboard. (See Fig.17)Fig.16Fig.17NutVolume knobFront panel assemblyJog knobUUUVSoldered section iPower switch boardSystem control boardParallel wireFront panel assembly1-10 (No.22038)SECTION 3Adjustment3.1 Adjustment methodFront amp. board (L) CN302VR302Front amp. b