Jvc-RX-7012-VSL-Service-Manual电路原理图.pdf

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1、SERVICE MANUALAUDIO/VIDEO CONTROL RECEIVERNo.21005Jul. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.RX-7012VSLRX-7012VSLAUSUTAustraliaSingaporeTaiwanArea SuffixContentsSafety precautions -1-2Disassembly method -1-3Adjustment method -1-8Description of major ICs -1-921DIGITALCONTROL+231564897/P0 +1

2、010BASS BOOST EFFECTMENUENTERTEST + REARL SOUND SUB WOOFER + REARR +MUTINGCH TV VOLPLAYSTOP/REW FF/VOLUMECATV/DBSTV/VIDEORECPAUSEPAUSERETURN FM MODE 100+CONTROLA/V CONTROL RECEIVERCATV/DBS VCR TV AUDIODSPMODE INPUTON/OFFDVD MUILTIDVD CDTAPE/CDRTREBLETV/DBS VCR PHONOFM/AMBASSSURROUND ANALOG/DIGITAL S

3、LEEP+ CENTER TUNING+ + DVD VCR TV SOUND/DBSADJUSTAUDIO/VIDEO CONTROL RECEIVERSETTINGMASTER VOLUMECONTROLDOWN UPCD TAPE/CDRSOURCE NAMEBASS BOOSTINPUTANALOG/DIGITALSPEAKERS ON/OFFDSP MODEPHONESSURROUND ON/OFFFM/AM TUNINGSTANDBYFM/AM PRESET FM MODEMEMORYINPUT ATTFM/AMDIGITALDIGITALSURROUNDDVD MULTIPHON

4、OSOURCE NAME12COMPULINKRemoteSTANDBY/ONBecause the A version of this model has no AV COMPU LINK function, the AV COMPU LINKs logo mark is not attached on the A version model.RX-7012VSL1-21. This design of this product contains special hardware and many circuits and components specially for safety pu

5、rposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.2. Alterations of the design or ci

6、rcuitry of the product should not be made. Any design alterations of the product should not be made. Any design alterations or additions will void the manufacturers warranty and will further relieve the manufacture of responsibility for personal injury or property damage resulting therefrom.3. Many

7、electrical and mechanical parts in the products have special safety-related characteristics. These characteristics are often not evident from visual inspection nor can the protection afforded by them necessarily be obtained by using replacement components rated for higher voltage, wattage, etc. Repl

8、acement parts which have these special safety characteristics are identified in the Parts List of Service Manual. Electrical components having such features are identified by shading on the schematics and by ( ) on the Parts List in the Service Manual. The use of a substitute replacement which does

9、not have the same safety characteristics as the recommended replacement parts shown in the Parts List of Service Manual may create shock, fire, or other hazards.4. The leads in the products are routed and dressed with ties, clamps, tubings, barriers and the like to be separated from live parts, high

10、 temperature parts, moving parts and/or sharp edges for the prevention of electric shock and fire hazard. When service is required, the original lead routing and dress should be observed, and it should be confirmed that they have been returned to normal, after re-assembling.5. Leakage current check

11、(Electrical shock hazard testing)After re-assembling the product, always perform an isolation check on the exposed metal parts of the product (antenna terminals, knobs, metal cabinet, screw heads, headphone jack, control shafts, etc.) to be sure the product is safe to operate without danger of elect

12、rical shock.Do not use a line isolation transformer during this check.Plug the AC line cord directly into the AC outlet. Using a “Leakage Current Tester“, measure the leakage current from each exposed metal parts of the cabinet, particularly any exposed metal part having a return path to the chassis

13、, to a known good earth ground. Any leakage current must not exceed 0.5mA AC (r.m.s.).Alternate check methodPlug the AC line cord directly into the AC outlet. Use an AC voltmeter having, 1,000 ohms per volt or more sensitivity in the following manner. Connect a 1,500 10W resistor paralleled by a 0.1

14、5 F AC-type capacitor between an exposed metal part and a known good earth ground.Measure the AC voltage across the resistor with the AC voltmeter. Move the resistor connection to each exposed metal part, particularly any exposed metal part having a return path to the chassis, and measure the AC vol

15、tage across the resistor. Now, reverse the plug in the AC outlet and repeat each measurement. Voltage measured any must not exceed 0.75 V AC (r.m.s.). This corresponds to 0.5 mA AC (r.m.s.). 1. This equipment has been designed and manufactured to meet international safety standards.2. It is the lega

16、l responsibility of the repairer to ensure that these safety standards are maintained.3. Repairs must be made in accordance with the relevant safety standards.4. It is essential that safety critical components are replaced by approved parts.5. If mains voltage selector is provided, check setting for

17、 local voltage.Good earth groundPlace this probe on each exposedmetal part.AC VOLTMETER(Having 1000 ohms/volts,or more sensitivity)1500 10W0.15 F AC TYPE!Burrs formed during molding may be left over on some parts of the chassis. Therefore, pay attention to such burrs in the case of preforming repair

18、 of this system.In regard with component parts appearing on the silk-screen printed side (parts side) of the PWB diagrams, the parts that are printed over with black such as the resistor ( ), diode ( ) and ICP ( ) or identified by the “ “ mark nearby are critical for safety. When replacing them, be

19、sure to use the parts of the same type and rating as specified by the manufacturer. (Except the J&C version)RX-7012VSL1-3Remove the four screws A attaching the top cover on both sides of the body.Remove the three screws B on the back of the body.Remove the top cover from behind in the direction of t

20、he arrow while pulling both sides outward.1.2.3.Disassembly methodRemoving the top cover (See Fig.1)Prior to performing the following procedure, remove the top cover.Remove the power cord stopper from the rear panel by moving it in the direction of the arrow.Remove the twenty eight screws E attachin

21、g the each boards to the rear panel on the back of the body.Remove the four screws F attaching the rear panel on the back of the body.1.2.3.Removing the rear panel (See Fig.4)Prior to performing the following procedure, remove the top cover.Disconnect the card wire from connector CN402 on the audio

22、board and CN201 on the power supply board in the front panel assembly.Cut off the tie band fixing the harness.Remove the three screws C attaching the front panel assembly.Remove the four screws D attaching the front panel assembly on the bottom of the body. Detach the front panel assembly toward the

23、 front.1.2.3.4.Removing the front panel assembly (See Fig.2 and 3)Removing the voltage selector (See Fig.4)1.2.Prior to performing the following procedure, remove the top cover.Remove the power cord stopper from the rear panel by moving it in the direction of the arrow.Remove the two screws E attach

24、ing the rear panel on the back of the body.Fig.1Fig.2Fig.3Fig.4A 2A 2BTop coverCPower supply boardAudio boardCN402MainboardTie bandDEEFEFFCord stopperCFront panel assemblyFront panel assemblyDRear panelCN201FEEEEERX-7012VSL1-4Prior to performing the following procedure, remove the top cover and the

25、rear panel.Cut off the tie band fixing the harness.Disconnect the DSP board from connector CN481 on the audio board.Disconnect the audio input board, DVD board Video board and the S video board from connector CN421, CN431,CN441 and CN461 on the audio board.Disconnect the tuner board from connector C

26、N411 on the audio board.1.2.3.4.Removing each board connected to the rear side of the audio board(See Fig.5 to 8)Fig.5Fig.6Fig.7Fig.8CN411Tie bandDSPboardDVDboardVideo boardTunerboardAudioinputboardDSP boardCN481CN441CN431CN421CN481CN421CN431CN441CN411Tie bandCN421CN431 CN441AudioinputboardDVDboardV

27、ideo boardTunerboardAudioboardCN461S Video boardCN461S Video boardCN461RX-7012VSL1-5Prior to performing the following procedure, remove the top cover and the rear panel.Removing the audio board (See Fig.9)Disconnect the card wire from connector CN402 on the audio board.Disconnect the relay board fro

28、m the audio board and the power supply board. (CN291,CN491)Disconnect the harness from connector CN473, CN471, CN472, and CN385.Remove the three screws G attaching the audio board assembly.Remove the screw H attaching the audio board assembly.1.2.3.4.5.Remove the ten screws K and four screws L attac

29、hing the heat sink.Remove the two screws M attaching the heat sink from the rear side of main board.1.2.Removing the Heat sink (See Fig.11 to 12)Prior to performing the following procedure, remove the top cover, the rear panel and audio board.Disconnect the harness from connector CN241 and CN203 on

30、the power supply board respectively.Remove the four screws I and the two screws J attaching the main board.1.2.Removing the main board (See Fig.10)Fig.9Fig.10Fig.11Fig.12powersupply boardPower / FuseboardRelay board CN473Audio boardMain boardrear sideMainboardHeat sink CN291CN203CN491HGCN471CN385CN4

31、02CN472Power transformerGGCN241IIIIJJLLKKKMMVoltage selectboardRX-7012VSL1-6Prior to performing the following procedure, remove the top cover and the rear panel.Remove the screw O attaching the power / fuse board.Unsolder the power cord and other harnesses connected to the power / fuse board.1.2.Rem

32、oving the power / fuse board(See Fig.13 to 14)Prior to performing the following procedures, remove the top cover.Unsolder the two harnesses connected to the power transformer.Disconnect the harness from connector CN251 and unsolder the harnesses connected to FW201 on the power transformer board.Remo

33、ve the four screws N attaching the power transformer.1.2.3.Removing the power transformer(See Fig.14)Removing the voltage select board(See Fig.13)1.2.Prior to performing the following procedures, remove the top cover and the rear panel.Cut off the tie band fixing the harness.Unsolder the six harness

34、es connected to the power transformer.Fig.13Fig.14Powersupply boardCN251Power transformerNSolder pointsNSolder pointsSolderpointsOPower / fuse boardPower cordPower transformerboardFW201Power transformerSolderpointsSolderpointsTie bandPower cordVoltageselect boardVoltage selectorSolder pointsRX-7012V

35、SL1-7Prior to performing the following procedure, remove the top cover and the front panel assembly.Pull out the volume knob on the front side of the front panel and remove the nut attaching the system control board.Remove the two screws Q attaching the power switch board.Disconnect the harness from

36、 connector CN714 on the power switch board.Remove the six screws R attaching the system control board on the back of the front panel.On the back of the front panel, release the eight joints by pushing the joint tabs inward. Remove the operation switch panel toward the front.Release the two hook atta

37、ching the system control board.1.2.3.4.5.6.Removing the system control board / power switch board (See Fig.17 to 19)Prior to performing the following procedure, remove the top cover and the front panel.Remove the one nut attaching the headphone jack of the power supply board on the front side of the

38、 body.Disconnect the harness connected to connector CN201,CN203,CN241 on the power supply board (If necessary, cut off the band fixing the harness on the side of the base chassis).Disconnect the relay board to connector CN291 on the power supply board.Remove the three screws P attaching the power su

39、pply board and pull out the power supply board from the front bracket backward.Unsolder the three harnesses connected to the power supply board.1.2.3.4.5.Removing the power supply board (See Fig.15 and 16)Fig.17Fig.18Fig.19Front panel assemblyNutMASTER VOLUME knobSystem control boardPower switchboar

40、dRRCN714QJointJointJoint Joint Joint JointHookHookOperation switch panelJointJointFig.15Fig.16CN241Power supplyboard NutHeadphone jackHeadphone jackTie bandSolder pointsPPPSolder pointsCN201CN291HookCN203RX-7012VSL1-8Adjustment method1.Set the volume control to minimum during this adjustment.(No sig

41、nal & No load)2.Set the surround mode OFF.2.Turn VR301 and VR302 fully counterclockwise to warm up before adjustment.If the heat sink is already warm from previous use the correct adjustment can not be made.3.For L-ch,connect a DC voltmeter between TP301s B216 and B217 (Lch)And,connect it between TP

42、302s B218 and B219(Rch).4.30 minutes later after power on, adjust VR301 for L-ch, or VR302 for R-ch so that the DC voltmeter value has 1mV10mV.1.Tuner rangeFM 87.5MHz108.0MHz AM(MW) 522kHz1629kHz : (A model)531kHz1602kHz (9kHz step) : (US,UT model)530kHz1600kHz (10kHz step) : (US,UT model)Tuner sect

43、ionPower amplifier sectionTP302(Rch)VR301 (Lch)VR302 (Rch)Heat sinkAdjustment of idling currentMeasurement location TP301(Lch) , TP302(Rch)Adjustment part VR301(Lch) , VR302(Rch)AttentionThis adjustment does not obtain a correct adjustment value immediately after the amplifier isused (state that an

44、internal temperature has risen). Please adjust immediately after using the amplifier after turning off the power supply of theamplifier and falling an internal temperature. * It is not abnormal though the idling current might not become 0mA even if it is finished to turn variableresistance (VR301,VR

45、302) in the direction of counterclockwise. TP301(Lch)RX-7012VSL1-9DLCKS terminalLLHHDLONterminalLHLHDLL clock settingSCKI input (DLL circuit OFF)Four times XI clockThree times XI clockSix times XI clock1234567811121314151618192021222324252627,28293132,333435363738,39404142434445464748495051525354616

46、26370717280818289909192,939495969798,99100Pin No. Symbol I/O FunctionRSTMIMDMICSMILPMIDIOMICKMIACKFI03IRQVSSLRCKABCKASDO02SD03LRCKBBCKBSDT0SDT1VDDLRCKOABCKOATEST0,1LRCKOB,BCKOB,TXOTEST2,3RXVSSTSTSUB0FCONTTSTSUB1,TSTSUB2PDOVDDAPLONAMPIAMPOCKIVSSACKOLOCKVSSWROECEVDDIO70VSSAD07VDDAD816VSSPO07VDDDLLPFOD

47、LON,DLCKSSCKOVSSDLSCKIVSSXXO,XIVDDXIIIII/OIOII-IIO-IIII-OOI-II-IOIO-IIOI-OO-OOO-I/O-O-O-O-OI-I-I/O-Reset signal input terminal (L: reset H: Operation usually)Microcomputer interface mode selection input terminal (L: serial H:IC bus)Microcomputer interface chip select input terminalMicrocomputer inte

48、rface latch pulse inputMicrocomputer interface data I/O terminalMicrocomputer interface clock input terminalMicrocomputer interface acknowledge output terminalFlag input terminal 03Interrupt input terminalDigital ground terminalAudio interface LR clock input terminal AAudio interface bit clock input terminal AAudio interface data output terminal 0Non connectAudio interface LR clock input terminal BAudio interface bit clock input terminal BAudio interface data input terminal 0Audio interface data input terminal 1Power supp