JVC-RXDV31SL-avr-sm 维修电路原理图.pdf

SERVICE MANUALCOPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITEDNo.220232003/6HOME THEATER DVD-AUDIO/VIDEO RECEIVER2202320036RX-DV31SLTABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-32SPECIFIC SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-64ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-215TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-226DESCRIPTION OF MAJOR ICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23 Area suffixJ - U.S.A.C - CanadaDVD/SUPER VCD/VCD/CDCOMPAC TSUPER VIDEORX-DV31 HOME THEATER DVD-AUDIO/VIDEO RECEIVERRadioFans.CN 收音机爱 好者资料库1-2 (No.22023)SPECIFICATIONAmplifierOutput PowerAt Stereo operationFront channels100 W per channel, min. RMS, driven into 8 , 40 Hz to 20 kHz with no more than 0.8% total harmonic distortion.At Surround operation Front channels100 W per channel, min. RMS, driven into 8 at 1 kHz, with no more than 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 more than 0.8% total harmonic distortion.AudioAudio Input Sensitivity/Impedance (1 kHz)TV, TAPE/CDR, DBS, VCR240 mV/47 kAudio Input (DIGITAL IN)*CoaxialDIGITAL 1 (DBS)0.5 V(p-p)/75 OpticalDIGITAL 2 (TV)-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).Signal-to-Noise Ratio (66 IHF/78 IHF)TV, TAPE/CDR, DBS, VCR87 dB/67 dBFrequency Response (8 )TV, TAPE/CDR, DBS, VCR20 Hz to 20 kHz (1 dB)Tone ControlBass (100 Hz)10 dB 2 dBTreble (10 kHz)10 dB 2 dBVideoVideo Input Sensitivity/Impedance (1 kHz)Composite videoDBS IN, VCR IN1 V(p-p)/75 S-videoDBS IN, VCR IN(Y:luminance)1 V(p-p)/75(C:chrominance)0.286 V(p-p)/75 Video Output Level/Impedance (1 kHz)Composite videoVCR OUT, MONITOR OUT1 V(p-p)/75 S-videoVCR OUT, MONITOR OUT(Y:luminance)1 V(p-p)/75 (C:chrominance)0.286 V(p-p)/75 Component videoDVD COMPONENT VIDEO OUT(Component-Y)1.0 V(p-p)/75 (Component-PB/PR) 0.7 V(p-p)/75 Color System NTSCHorizontal Resolution500 linesSignal-to-Noise Ratio (S/N)63 dBSynchronizeNegativeFM tuner (IHF)Tuning Range87.5 MHz to 108.0 MHzAM tunerTuning Range530 kHz to 1 710 kHzGeneralPower RequirementsAC 120 V , 60 HzPower Consumption200 W/255 VA (in operation)2 W (in standby mode)Dimensions (W H D)435 mm 100 mm 403.5 mm(17 3/16 in. 3 15/16 in. 15 15/16 in.)Mass8.4 kg (18.5 lbs)RadioFans.CN 收音机爱 好者资料库(No.22023)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.22023)1.5Importance administering poin on the safetyF132F131F101Caution: For continued protection against risk offire, replace only with same type 5A/125V forF101, 2A/125V for F131 and F132.This symbol specifies type of fast operating fuse.Precaution: Pour eviter risques de feux, remplacezle fusible de surete de F101 comme le meme typeque 5A/125V, et 2A/125V pour F131 et F132.Ce sont des fusibles suretes qui functionnes rapide.Main board (Forward side)Power board (Forward side)(No.22023)1-5SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.1-6 (No.22023)SECTION 3DISASSEMBLY3.1Main body section3.1.1Removing the top cover (See Fig.1)(1) From the both sides of the main body, remove the fourscrews 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.13.1.2Removing the front panel assembly (See Figs.2 to 4) Prior to performing the following procedures, remove the topcover.(1) From the top side of the main body, disconnect the card wirefrom the connector CN114 on the main board. (See Fig.2.)(2) Remove the screw C attaching the earth wire and subtrans. Board. (See Fig.2.)(3) From the bottom side of the main body, remove the fivescrews D attaching the front panel assembly. (See Fig.3.)(4) From the both side of the main body, release the two jointsa using a flat-bladed screwdriver and remove the front pan-el assembly in the direction of the arrow. (See Fig.4.)Fig.2Fig.3Fig.4B112Ax2Ax2Top coverCCN114Main boardEarth wireSub trans boardFront panel assemblyDFront panel assemblyJoint aFront panel assembly(No.22023)1-73.1.3Removing the rear panel (See Fig.5) Prior to performing the following procedures, 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 twenty three screws E attaching the eachboard to the rear panel.(3) Remove the four screws F attaching the rear panel.Fig.53.1.4Removing the DSP board (See Figs.6 and 7) Prior to performing the following procedures, remove the topcover.(1) From the back side of the main body, remove the fourscrews G attaching the DSP board to the rear panel. (SeeFig.6.)(2) From the top side of the main body, disconnect the DSPboard from the connector CN611 on the DSP connectorboard. (See Fig.7.)(3) From the left side of the main body, lift the DSP board in thedirection of the arrow and disconnect the card wire from theconnector CN602 on the DSP board. (See Fig.7.)(4) Take out the DSP board.3.1.5Removing the video jack board (See Figs.6 and 7) Prior to performing the following procedures, remove the topcover and DSP board.(1) From the back side of the main body, remove the fourscrews H attaching the video jack board. (See Fig.6.)(2) Disconnect the card wire from the connector CN402 on thevideo jack board and take out the video jack board. (SeeFig.7.)Fig.6Fig.7FRear panelEEFFEStrain reliefFHRear panelGDSP boardDSP connector boardCard wireCard wireVideo jack boardCN611CN402CN6021-8 (No.22023)3.1.6Removing the tuner (See Figs.8 and 9) Prior to performing the following procedures, remove the topcover, DSP board and video jack board.(1) From the back side of the main body, remove the twoscrews J attaching the tuner. (See Fig.8.)(2) From the top side of the main body, disconnect the cardwire from the connector CN1 on the tuner. (See Fig.9.)(3) Take out the tuner.Fig.8Fig.93.1.7Removing the DAC board (See Fig.10) Prior to performing the following procedures, remove the topcover.(1) From the top side of the main body, disconnect the DACboard from the connectors CN911 and CN912 on the mainboard.Fig.10JCN 1TunerCard wireCN911CN912DAC boardMain board(No.22023)1-93.1.8Removing the amp. board (See Fig.11) Prior to performing the following procedures, remove the topcover and rear panel.(1) From the top side of the main body, disconnect the wirefrom the connector CN201 on the amp. board.(2) Remove the screw K attaching the earth wire to the heatsink barcket.(3) Remove the four screws L attaching the amp. board.(4) Disconnect the connector CN202 on the amp. board.(5) Lift the amp. board and disconnect the wire from the con-nector CN231 on the main board.(6) Disconnect the parallel wire from the connector CN241 onthe main board and take out the amp. board.Fig.113.1.9Removing the heat sink (See Fig.12) Prior to performing the following procedures, remove the topcover, rear panel and amp. board.(1) Remove the screw M attaching the H.sensor board.(2) Remove the five screws N attaching the IC bracket, heatsink bracket and heat sink.Fig.123.1.10 Removing the power ICs (See Fig.13) Prior to performing the following procedures, remove the topcover, rear panel, amp. board and heat sink.(1) From the reverse side of the amp. board, remove the sol-ders from the soldered points b attaching the power ICs tothe amp. board.Fig.13LCN201Earth wireKCN202Main boardAmp. boardCN231CN241Heat sink bracketNH. sensor boardMHeat sink bracketHeat sinkIC bracketAmp. boardNNAmp. boardPower ICs solbered points b1-10 (No.22023)3.1.11 Removing the amp. sub(a) board and amp. sub(b) board (See Fig.14) Prior to performing the following procedures, remove the topcover, rear panel and amp. board.(1) From the forward side of the amp. board, disconnect theamp. sub(a) board from the connector CN203 on the ampboard.(2) Disconnect the amp. sub(b) board from the connectorCN204 on the amp. board.Fig.143.1.12 Removing the DVD mechanism assembly (See Fig.15) Prior to performing the following procedures, remove the topcover and front panel assembly.(1) From the top side of the main body, remove the screw Pand two screws Q attaching the DVD mechanism assem-bly.Reference: When attaching the screw P, attach the thrust springtogether with it. When attaching the screw Q, attach the earth wires to-gether with them.(2) Disconnect the DVD mechanism assembly from the con-nectors CN512 and CN513 on the main board.(3) Take out the DVD mechanism assembly.Fig.153.1.13 Removing the main board (See Fig.16) Prior to performing the following procedures, remove the topcover, rear panel, DAC board, DSP board, video jack board,tuner, amp. board and DVD mechanism assembly.(1) From the top side of the main body, disconnect the fan mo-tor wire from the connector CN122 on the main board.(2) Disconnect the card wire from the connector CN125 on themain board.(3) Disconnect the wire from the connector CN121 on the mainboard.(4) Disconnect the parallel wire from the connector CN291 onthe main board.(5) Remove the five screws R attaching the main board.Reference:Remove the barrier, DSP connector board and amp. connec-tor board as required.Fig.16CN203CN204Amp. sub (b) boardAmp. sub (a) boardAmp. boardQPQCN513Earth wiresCN512Thrust springDVD mechanism assemblyRRCN122CN125CN121CN291Amp. connectorboardMain boardBarrierFanmotorwireCardwireWireParallel wireDSP connecterboard(No.22023)1-113.1.14 Removing the sub trans. Board (See Fig.17) Prior to performing the following procedures, remove the topcover and front panel assembly.(1) From the top side of the main body, remove the tie bandbundling the wires.(2) Disconnect the card wire from the connector CN115 on thesub trans. board.(3) Disc