JVC-RXDP20VBK-avr-sm 维修电路原理图.pdf

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1、SERVICE MANUALCOPYRIGHT 2003 VICTOR COMPANY OF JAPAN, LIMITEDNo.220082003/7AUDIO/VIDEO CONTROL RECEIVERRX-DP20VBKTABLE OF CONTENTS1PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-42SPECIFIC

2、SERVICE INSTRUCTIONS. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-63DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-74ADJUSTMENT

3、 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-185TROUBLE SHOOTING. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-21AU

4、D O/V DEO CONTROL RECE VERRX DP20VSTANDBY/ONSTANDBYPHONESD MMERCC CONVERTERZONE 1ON/OFFZONE 2ON/OFFDOORUPDOORDOWNMASTER VOLUMES-V DEOD G TALVIDEOLAUDIORVIDEOCHANNELTV VIDEOMUT NGDVDN/ FO /O FST NDB / NST NDB / NS AND YTBS OND MUCDC RHO OPE MXT 7 CAN LOG D G T LCC CO VER ERFFECTL V NESSSOUNDESTTHXX E

5、S 7 1AN LOG DI ECTSLEEPDIMMERM MODEDSPURR DSPS RROUNDRE URN0+O FNPUSETTUM NA JUENUDVDME UE ITT XTI P A1234567/8910100TV VOLVOLUMETUN NGSTOPPAU EFF REWRECPLAYDOWNUPRM SR DP20J REOTE CO TROLA V CONTROL RECE VERCR 1CR 2FM AMID OV DBZO E 2TR NSMTEA NONE 1 Z NE 1 ZONE 2L ARNZO E 1TVCA VBSArea SuffixJ - U

6、.S.A.C - CanadaRadioFans.CN 收音机爱 好者资料库1-2 (No.22008)SPECIFICATIONAmplifierOutput PowerAt Stereo operation (Analog Direct On)Front channels120 W per channel, min. RMS, driven into 8 , 20 Hz to 20 kHz with no more than 0.02% total harmonic distortion. 120 W per channel, min. RMS, driven into 4 , 20 Hz

7、 to 20 kHz with no more than 0.07% total harmonic distortion.At Surround operation(Analog Direct On)Front channels120 W per channel, min. RMS, driven into 8 , 20 Hz to 20 kHz with no morethan 0.02% total harmonic distortion. Center channel120 W, min. RMS, driven into 8 , 20 Hz to 20 kHz with no more

8、 than 0.02%total harmonic distortion.Surround channels120 W per channel, min. RMS, driven into 8 , 20 Hz to 20 kHz with no morethan 0.02% total harmonic distortion.Surround back channels120 W per channel, min. RMS, driven into 8 , 20 Hz to 20 kHz with no morethan 0.02% total harmonic distortion.Audi

9、oAudio Input Sensitivity/Impedance(1 kHz)PHONO IN (MC)0.25 mV/100 (MM)2.5 mV/47 kCD IN, CDR IN, TAPE/MD IN, EXT 7.1CH IN200 mV/47 kDVD IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN, VIDEO200 mV/47 kAudio Input(DIGITAL IN)*Coaxial1(DVD), 2(CD), 3(TV/DBS) 0.5 V(p-p)/75 Optical4(CDR), 5(MD), 6(VCR1)-21 dBm t

10、o -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)Audio Output LevelZONE 2 PREOUT200 mVPREOUT1 VRecording OutputLevelTAPE/MD OUT, CDR OUT, VCR 1 OUT, VCR 2 OUT200 mVDigital outputOpticalDIGITAL OUTSignal

11、wave length660 nmOutput levelSignal-to-Noise Ratio (66 IHF/78 IHF)(Analog Direct On)PHONO IN (MC)60 dB/72 dB (at REC OUT)(MM)72 dB/80 dB (at REC OUT)CD IN, CDR IN, TAPE/MD IN, EXT 7.1CH IN92 dB/80 dBDVD IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN, VIDEO92 dB/80 dBFrequency Response (8 )PHONO IN (MC) 20

12、Hz to 20 kHz (1 dB)(MM)20 Hz to 20 kHz (1 dB)CD IN, CDR IN, TAPE/MD IN, EXT 7.1CH IN10 Hz to 100 kHz (+1 dB, -3 dB)DVD IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN, VIDEO10 Hz to 100 kHz (+1 dB, -3 dB)RIAA Phono Equalization1.0 dB (20 Hz to 20 kHz)VideoVideo Input Sensitivity/ImpedanceComposite videoDVD

13、IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN, VIDEO1 V(p-p)/75 S-videoDVD IN, VCR 1 IN, VCR 2 IN, TV SOUND/DBS IN, VIDEO(Y: luminance)1 V(p-p)/75(C: chrominance, burst)0.286 V(p-p)/75 Component1 IN (DVD), 2 IN,3 IN(Y: luminance)1 V(p-p)/75 (PB, PR)0.7 V(p-p)/75 Video Output LevelComposite videoVCR 1 OUT,

14、VCR 2 OUT,MONITOR OUT1 V(p-p)/75 S-videoVCR 1 OUT, VCR 2 OUT, MON-ITOR OUT(Y: luminance)1 V(p-p)/75(C: chrominance, burst)0.286 V(p-p)/75 ComponentMONITOR OUT(Y: luminance)1 V(p-p)/75 (PB, PR): 0.7 V(p-p)/75 SynchronizationNegativeSignal-to-Noise Ratio45 dBRadioFans.CN 收音机爱 好者资料库(No.22008)1-3Designs

15、 & specifications are subject to change without notice.FM tuner (IHF)Tuning Range87.5 MHz to 108.0 MHzUsable SensitivityMonaural12.8 dBf (1.2 V/75 )50 dB Quieting SensitivityMonaural18.2 dBf (2.2 V/75 )Stereo38.2 dBf (22.3 V/75 )Signal-to-Noise Ratio (IHF-A weighted)Monaural78 dB at 85 dBfStereo73 d

16、B at 85 dBfTotal Harmonic DistortionMonaural0.2% at 1 kHzStereo0.3% at 1 kHzStereo Separation at REC OUT40 dB at 1 kHzAlternate Channel Selectivity60 dB (400 kHz)Frequency Response30 Hz to 15 kHz (+0.5 dB, -3 dB)AM tunerTuning Range530 kHz to 1 710 kHzUsable SensitivityLoop antenna: 400 V/mSignal-to

17、-Noise Ratio50 dB (100 mV/m)GeneralPower Requirements AC 120V, 60 HzPower Consumption580 W/690 VA (at operation)2.7 watts (in standby mode)Dimensions (W H D)445 mm 177 mm 475 mm(17 9/16 in. 7 in. 18 3/4 in.)Mass23.5 kg (52 lbs)1-4 (No.22008)SECTION 1PRECAUTION1.1Safety Precautions(1) This design of

18、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.

19、 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 themanufac

20、ture 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

21、 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 (

22、) 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

23、 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 confirmedtha

24、t 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 sur

25、e 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 ex

26、posed 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. Co

27、nnect 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 returnp

28、ath 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

29、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 main

30、s 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 appear

31、ing 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

32、 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 TYPE(No.22008)1-51.5Importance administering point on the safetyCaution: For continued prot

33、ection against risk offire, replace only with same type 8A/250V for F21,0.5A/250V for F41 and 2A/125V for F42 and F43.This symbol specifies type of fast operating fuse.Precaution: Pour eviter risques de feux, remplacezle fusible de surete de F21 comme le meme typeque 8A/250V, et 0.5A/250V pour F41,

34、et 2A/125Vpour F42 et F43. Ce sont des fusibles suretes qui functionnes rapide. C21 C22 C23 C24 C25 C26 C27 PW23 PW21 WR26 PW22 D21 D22 D23 D24 D25 D26 D27 R26 Q21 Q22 Q23 R21 R22 R23 R24 R25 RY21 T21 PW25 PW26 R27 R28 CN25 EP21 PW24 EP22 FC22 FC21 C41 C42 CN41 C43 D45 Q53 Q54 Q55 FC41 FC42 R51 R54

35、R42 T42 WR41 WR42 R41 C60 D41 TW51 FC43 FC44 R57 C40 WR48 C44 C49 C45 C46 C47 C48 R4011 R4012 C53 C54 C55 C56 R43 CN47 C59 IC44 D4001 D4002 D4003 D4004 C57 C58 R45 C51 D51 Q45 Q46 Q47 D48 D49 D50 FC401 FC402 TW42 CN46 Q41 Q42 Q43 Q44 C52 R55 R56 T41 R46 R47 R48 R49 R50 TH41 TW41 CN44 CN45 1-6 (No.22

36、008)SECTION 2SPECIFIC SERVICE INSTRUCTIONSThis service manual does not describe SPECIFIC SERVICE INSTRUCTIONS.(No.22008)1-7SECTION 3DISASSEMBLY3.1Main body section3.1.1Removing the top cover(See Fig.1)(1) Remove the eight screws A attaching the top cover on bothsides of the body.(2) Remove the three

37、 screws B on back of the body.(3) Remove the top cover from behind in the direction of the ar-row while pulling both sides outward.Fig.13.1.2Removing the front panel assembly(See Fig.2 and 3) Prior to performing the following procedure, remove the topcover.(1) Cut off the tie band 1 fixing the harne

38、ss.(2) Remove the screw a, and remove the lug wire.(3) Remove the three screws C attaching the front panel as-sembly.(4) Remove the four screws D attaching the front panel as-sembly on bottom of the body. Detach the front panel as-sembly toward the front.(5) Disconnect the harness from the connector

39、 CN971,CN977, CN983 and CN985 on the system control board(see fig.5), CN973 on the front AV in board and CN373 onthe front DIGITAL board (see 2-3.Front panel assemblysection/ fig.2).Fig.2Fig.3A(both sides)A(both sides)BTop coverCa(fixing thelug wire)Tie band 1 Harnessband Tuner unitCompu link boardA

40、udio 7.1chin boardV compo 2 boardY/C separatorboardRF remote unitCN1CN1CFront panel assemblyCN581CN481CN482CN301CN201Tie band 2 Tie band 3 Audio signal 1 boardDDFront panelassembly1-8 (No.22008)3.1.3Removing the V compo 2 board & RF remote unit & tuner unit & compu link board(See Fig.2 and 4) Prior

41、to performing the following procedure, remove the topcover.(1) Disconnect the harness from the connector CN581 on theV compo 2 board.Remove the two screws E attaching the V compo 2 boardto the rear panel.(2) Disconnect the harness from the connector CN1 on the RFremote unit.Remove the nut b attachin

42、g the RF remote unit to the rearpanel.(3) Disconnect the card wire from the connector CN1 on thetuner unit.Remove the two screws E attaching the tuner unit to therear panel.(4) Disconnect the harness from the connector CN301 on thecompu link board.Remove the four screws E attaching the compu linkboa

43、rd to the rear panel.3.1.4Removing the Y/C separator board(See Fig.2) Prior to performing the following procedure, remove the topcover.(1) Cut off the tie band 2 fixing the harness.(2) Draw out up the Y/C separator board, disconnecting theconnectors CN481 and CN482 on the Y/C separator board.3.1.5Re

44、moving the audio 7.1ch in board(See Fig.2 and 4) Prior to performing the following procedure, remove the topcover.(1) Cut off the tie band 2 & 3 fixing the harness.(2) Disconnect the harness from the connector CN201 on theaudio signal 1 board.(3) Remove the two screws E attaching the audio 7.1ch inb

45、oard to the rear panel.3.1.6Removing the rear panel(See Fig.4) Prior to performing the following procedure, remove the topcover.(1) Unsolder the two solder parts on the AC inlet.(2) Remove the forty four screws E & E & E & E & E andthe nut b attaching each board to the rear panel.(3) Remove the thir

46、teen screws F attaching the rear panel onthe back of the body and bottom.Fig.2Fig.4Ca(fixing thelug wire)Tie band 1 Harnessband Tuner unitCompu link boardAudio 7.1chin boardV compo 2 boardY/C separatorboardRF remote unitCN1CN1CFront panel assemblyCN581CN481CN482CN301CN201Tie band 2 Tie band 3 Audio

47、signal 1 boardbEFEEFFFFRear panelRedBlackEEEEEEEFSolder partAC inlet(No.22008)1-93.1.7Removing the system control board(See Fig.5 and 6) Prior to performing the following procedure, remove the topcover and front panel assembly.(1) Disconnect the card wires and harness from the connectorCN963, CN964

48、and CN981 on the system control board.(2) Cut off the tie bands fixing the harness.(3) Disconnect the harness from the connector CN45 on thepower supply 2 board and CN25 on the power/ fuse board.(4) Disconnect the connector CN324 on the audio signal 2board and CN234, CN208 on the audio signal 1 boar

49、d.(5) Remove the three plastic rivet.Fig.5Fig.63.1.8Removing the DSP board & shield cover(See Fig.7) Prior to performing the following procedure, remove the topcover, rear panel and front panel assembly.(1) Disconnect the connector CN631 on the DSP board.(2) Disconnect the connector CN203 on the aud

50、io signal 1board.And cut off the tie bands fixing the harness.(3) Removing the two plastic rivet, and disconnect the connec-tor CN633, CN643 and CN635 on the DSP board.(4) Removing the screw G attaching the shield cover and re-move the shield cover.Fig.7CN963CN981CN971CN977CN983CN964CN985System cont