Jvc-RXDV-31-SL-Service-Manual电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITEDNo.220232003/6HOME THEATER DVD-AUDIO/VIDEO RECEIVER2202320036RX-DV31SLTABLE OF CONTENTS1 PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2、. . . 1-32 SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-53 DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

3、. . . . 1-64 ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-215 TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

4、. . . . . . . . . 1-226 DESCRIPTION OF MAJOR ICS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23Area suffixJ - U.S.A.C - CanadaDVD/SUPER VCD/VCD/CDCOMPAC TSUPER VIDE ORX-DV31 HOME THEATER DVD-AUDIO/VIDEO RECEIVER1-2 (No.22023)SP

5、ECIFICATIONAmplifier Output Power At Stereo operation Front channels 100 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 channels 100 W per channel, min. RMS, driven into 8 at 1 kHz, with no more than 0.8% total ha

6、rmonic distortion.Center channel 100 W, min. RMS, driven into 8 at 1 kHz, with no more than 0.8% total harmonic distortion.Surround channels 100 W per channel, min. RMS, driven into 8 at 1 kHz, with no more than 0.8% total harmonic distortion.Audio Audio Input Sensitivity/Impedance (1 kHz)TV, TAPE/C

7、DR, DBS, VCR 240 mV/47 kAudio Input (DIGITAL IN)* Coaxial DIGITAL 1 (DBS) 0.5 V(p-p)/75 Optical DIGITAL 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 I

8、HF)TV, TAPE/CDR, DBS, VCR 87 dB/67 dBFrequency Response (8 ) TV, TAPE/CDR, DBS, VCR 20 Hz to 20 kHz (1 dB)Tone Control Bass (100 Hz) 10 dB 2 dBTreble (10 kHz) 10 dB 2 dBVideo Video Input Sensitivity/Impedance (1 kHz)Composite videoDBS IN, VCR IN 1 V(p-p)/75 S-video DBS IN, VCR IN (Y:luminance) 1 V(p

9、-p)/75(C:chrominance) 0.286 V(p-p)/75 Video Output Level/Impedance (1 kHz)Composite videoVCR OUT, MONITOR OUT 1 V(p-p)/75 S-video VCR 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-

10、p)/75 Color System NTSCHorizontal Resolution500 linesSignal-to-Noise Ratio (S/N)63 dBSynchronize NegativeFM tuner (IHF)Tuning Range 87.5 MHz to 108.0 MHzAM tuner Tuning Range 530 kHz to 1 710 kHzGeneral Power RequirementsAC 120 V , 60 HzPower Consumption200 W/255 VA (in operation)2 W (in standby mod

11、e)Dimensions (W H D)435 mm 100 mm 403.5 mm(17 3/16 in. 3 15/16 in. 15 15/16 in.)Mass 8.4 kg (18.5 lbs)(No.22023)1-3SECTION 1PRECAUTION1.1 Safety Precautions(1) This design of this product contains special hardware andmany circuits and components specially for safety purpos-es. For continued protecti

12、on, 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 shouldno

13、t 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

14、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 spe

15、cialsafety 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-teris

16、tics 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/or

17、sharp 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, alwa

18、ys 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.

19、Plug the AC line cord directly into the AC outlet. Using a“Leakage 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 0.5

20、mA 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 gro

21、und.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 me

22、asurement. Voltage measured any mustnot exceed 0.75 V AC (r.m.s.). This corresponds to 0.5mA 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

23、 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

24、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 t

25、he 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

26、 exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE1-4 (No.22023)1.5 Importance administering poin on the safetyF132 F131F101Caution: For continued protection against risk offire, replace only with same type 5A/125V forF101, 2A/125V for F131 and F132.Thi

27、s 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

28、-5SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.1-6 (No.22023)SECTION 3DISASSEMBLY3.1 Main body section3.1.1 Removing the top cover (See Fig.1)(1) From the both sides of the main body, remove the fourscrews A attaching the top cover.(2) Fro

29、m 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.13.1.2 Removing the front panel assembly (See Figs.2 to 4) Prior to perf

30、orming 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, rem

31、ove 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 boardEart

32、h wireSub trans boardFront panel assemblyDFront panel assemblyJoint aFront panel assembly(No.22023)1-73.1.3 Removing 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

33、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.53.1.4 Removing the DSP board (See Figs.6 and 7) Prior to performing the following procedures, remove the topcover.(1) From the back sid

34、e 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 thedirectio

35、n of the arrow and disconnect the card wire from theconnector CN602 on the DSP board. (See Fig.7.)(4) Take out the DSP board.3.1.5 Removing 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,

36、 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 connectorboardCard wireCard wireVideo jackb

37、oardCN611CN402CN6021-8 (No.22023)3.1.6 Removing 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

38、 main body, disconnect the cardwire from the connector CN1 on the tuner. (See Fig.9.)(3) Take out the tuner.Fig.8Fig.93.1.7 Removing 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 c

39、onnectors CN911 and CN912 on the mainboard.Fig.10JCN 1TunerCard wireCN911CN912DAC boardMain board(No.22023)1-93.1.8 Removing 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 th

40、e 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

41、 board.(6) Disconnect the parallel wire from the connector CN241 onthe main board and take out the amp. board.Fig.113.1.9 Removing 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 boa

42、rd.(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 so

43、l-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) b

44、oard 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 con

45、nectorCN204 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.Refe

46、rence: 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 Re

47、moving 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

48、 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 b

49、arrier, DSP connector board and amp. connec-tor board as required.Fig.16CN203CN204Amp. sub (b) board Amp. sub (a) boardAmp. boardQPQCN513Earth wiresCN512Thrust springDVD mechanism assemblyRRCN122CN125 CN121 CN291Amp. connectorboardMain boardBarrierFanmotorwireCardwireWireParallel wireDSP connecterboard