JVC-RX5042S-avr-sm 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2004 VICTOR COMPANY OF JAPAN, LIMITEDNo.MB1712004/3AUDIO/VIDEO CONTROL RECEIVERMB17120043RX-5042STABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-135TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-14 Area suffixJ - U.S.A.C - CanadaRadioFans.CN 收音机爱 好者资料库1-2 (No.MB171)SPECIFICATIONDesigns and specifications are subject to change without notice.AmplifierOutput PowerAt Stereo operationFront channels100 W per channel, min. RMS, driven into 8 , 40 Hz to 20 kHz withno more than 0.8% total harmonic distortion.At Surround operationFront channels100 W per channel, min. RMS, driven into 8 , at 1 kHz with no morethan 0.8% total harmonic distortion.Center channel100 W, min. RMS, driven into 8 , at 1 kHz with no more than 0.8%total harmonic distortion.Surround channels100 W per channel, min. RMS, driven into 8 , at 1 kHz with no morethan 0.8% total harmonic distortion.AudioAudio Input Sensitivity/Impedance (1 kHz)CD, TAPE/CDR, VCR, TV SOUND, DVD:220 mV/47 kAudio Input (DIGITAL IN)*CoaxialDIGITAL 1 (DVD):0.5 V(p-p)/75 OpticalDIGITAL 2 (CD):-21 dBm to -15 dBm (660 nm 30 nm)* Corresponding to Linear PCM, Dolby Digital, and DTS Digital Surround (with sampling frequency-32 kHz, 44.1 kHz, 48 kHz)Recording Output LevelTAPE/CDR, VCR:220 mVSignal-to-Noise Ratio(66 IHF/78 IHF)CD, TAPE/CDR, VCR, TV SOUND, DVD:87 dB/74 dBFrequency Response (8 )CD, TAPE/CDR, VCR, TV SOUND, DVD:20 Hz to 50 kHz (+1 dB, -3 dB)Bass Boost+3 dB 1 dB at 100 Hz (Only for RX-6040B/RX-6042S)Equalization (5 bands) 63 Hz, 250 Hz, 1 kHz, 4 kHz, 16 kHz (8 dB in 2 dB steps)VideoVideo Input Sensitivity/ImpedanceComposite video:DVD, VCR1 V(p-p)/75 Video Output LevelComposite video:VCR, MONITOR OUT1 V(p-p)/75 SynchronizationNegativeSignal-to-Noise Ratio45 dBFM tuner (IHF)Tuning Range87.5 MHz to 108.0 MHzUsable SensitivityMonaural:12.8 dBf (1.2 V/75 )50 dB Quieting SensitivityMonaural:16.0 dBf (1.7 V/75 )Stereo:37.5 dBf (20.5 V/75 )Stereo Separation at OUT (REC)35 dB at 1 kHzAM tunerTuning Range530 kHz to 1 710 kHzGeneralPower RequirementsAC 120V , 60 HzPower Consumption200 W/260 VA (at operation):2 W (in standby mode)Dimensions (W H D)435 mm 146.5 mm 369.5 mm (17 3/16 in. 5 13/16 in. 14 5/8 in.)Mass7.5 kg (16.6 lbs)RadioFans.CN 收音机爱 好者资料库(No.MB171)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.MB171)1.5Importance administering point on the safetyCaution: For continued protection against risk offire, replace only with same type 6.3A/125V forF201, 2A/125V for F202 and F203, 5 A/125 V forF206 and F207.This symbol specifies type of fast operating fuse.Precaution: Pour eviter risques de feux, remplacezle fusible de surete de F201 comme le meme typeque 6,3 A/125 V, 2 A/125 V pour F202 et F203, et5 A/125 V pour F206 et F207.Ce sont des fusibles suretes qui functionnes rapide.Secondary parts(Power transformer board 1)Primary part(Power / Fuse board)5A-125VF2065A-125VF2072A-125VF2022A-125VF2036.3A-125VF201(No.MB171)1-5SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.1-6 (No.MB171)SECTION 3DISASSEMBLY3.1 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 thedirection of the arrow 1.Fig.13.2 Removing the front panel assembly(See Figs.2 and 3) Prior to performing the following procedures, remove the top cover.(1) Disconnect the card wire from the connector CN402 on thefront 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 remove the wire protection boardfixing the card wire. (See Fig.2.)(4) Remove the three screws C attaching the front panelassembly. (See Fig.2.)(5) From the bottom side of the main body, remove the fourscrews D attaching the front panel assembly. (See Fig.3.)(6) Remove the front panel assembly in the direction of thearrow. (See Fig.3.)Fig.2Fig.3BAA211Top coverCFront panel assemblyCard wireCN201Power supply boardTie bandWire protection boardCard wireCN402Front boardCCDDFront panel assembly(No.MB171)1-73.3 Removing the rear panel(See Fig.4) Prior to performing the following procedures, remove the topcover.(1) From the back side of the main body, remove the strainrelief from the rear panel in the direction of the arrow.(2) Remove the twenty-one screws E attaching the rear panel.Fig.43.4 Removing the tuner (See Fig.5) Prior to performing the following procedures, remove the topcover.(1) Disconnect the card wire from the connector CN411 on thefront board.(2) Take out the tuner.Fig.53.5 Removing the DSP board, audio input board, DVD board and video board(See Fig.6) Prior to performing the following procedures, remove the topcover and rear panel.(1) From the top side of the main body, disconnect the DSPboard from the connector CN481 and CN482 on the frontboard.(2) Disconnect the audio input board from the connectorCN421 on the front board.(3) Disconnect the DVD board from the connector CN431 onthe front board.(4) Disconnect the video board from the connector CN441 onthe front board.Fig.6EEStrain reliefRear panelCard wireCN411TunerCN481Front boardDVD boardVideo boardCN421Audio input boardDSP boardCN431CN441CN4821-8 (No.MB171)3.6 Removing the front board (See Fig.7) Prior to performing the following procedures, remove the topcover, rear panel, DSP board, audio input board, DVD board,video board and tuner.(1) From the top side of the main body, disconnect the cardwire from the connector CN402 on the front board.(2) Disconnect the relay board from the connectors (CN291,CN491) on the power supply board and front board.(3) Disconnect the wires from the connectors CN471, CN472and CN473 on the front board.(4) Remove the two screws F attaching the front board.(5) Loosen the screw G attaching the front board.(6) Take out the front board from the main body.Fig.73.7 Removing the speaker terminal board (See Fig.8) Prior to performing the following procedure, remove the topcover and rear panel.From the top side of the main body, remove the solders fromthe soldered sections a on the speaker terminal board.Fig.8CN491CN402Front boardRelay boardPower supply boardFFGCN473CN471CN472CN291Card wireParallel wiresSpeaker terminal boardSoldered sections a(No.MB171)1-93.8 Removing the main board (See Fig.9) Prior to performing the following procedures, remove the topcover.(1) From the top side of the main body, remove the tie bandsfixing the wires.(2) Remove the tie band and remove the wire protection boardfixing the card wire.(3) Remove the solders from the soldered sections b on thespeaker terminal board attaching the parallel wires.(4) Disconnect the relay board from the connectors (CN291,CN491) on the power supply board and front board.(5) Disconnect the parallel wire from the connector CN241 onthe power supply board.(6) Disconnect the wire from the connector CN251 on thepower transformer board 1.(7) Disconnect the wires from the connectors CN471, CN472and CN473 on the front board.(8) Remove the screw G, two screws H and four screws Jattaching the main board.(9) Take out the main board from the main body.Fig.93.9 Removing the heat sink (See Figs.10 and 11) Prior to performing the following procedures, remove the topcover and main board.(1) Remove the three screws K attaching the heat sink. (SeeFig.10.)(2) From the reverse side of the main board, remove the twoscrews L attaching the heat sink. (See Fig.11.)3.10 Removing the power ICs (See Figs.11) Prior to performing the following procedures, remove the topcover, main board and heat sink.(1) From the reverse side of the main board, remove thesolders from the soldered sections c on the main board.(2) Take out the power ICs.Fig.10Fig.11Soldered sections bCN471CN472CN491Front boardCN473Card wireKJTie bandWire protection boardJTie bandsMain boardRelay boardJCN241Power supply boardCN251Tie bandCN291Powertransformerboard 1GParallel wiresSpeaker terminal boardHeat sinkMain boardKPower ICHeat sinkLLMain boardSoldered section c1-10 (No.MB171)3.11 Removing the power transformer (See Fig.12) Prior to performing the following procedures, 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 d on thepower transformer board 1.(3) Remove the solders from the soldered sections e on thepower transformer board 2.(4) Disconnect the wire from the connector CN251 on thepower transformer board 1.(5) Remove the four screws M attaching the powertransformer.(6) Take out the power transformer from the main body.3.12 Removing the power/fuse board (See Fig.12) Prior to performing the following procedures, remove the topcover.(1) From the back and top sides of the main body, remove thescrew N and screw P attaching the power/fuse board.(2) Remove the solders from the soldered sections f attachingthe power cord.(3) From the reverse side of the power/fuse board, remove thesolders from the soldered sections g attaching the wires.Fig.12CN251Soldered section dSoldered sections eSoldered sections fSoldered sections gTie bandPower transformerPowertransformerboard 2Power cordMMPNMMPower transformer board 1Power / Fuse boardSoldered sections g(No.MB171)1-113.13 Removing the power supply board (See Fig.13) Prior to performing the following procedures, 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) Remove the tie band fixing the parallel wire.(5) Disconnect the parallel