JVC-RX7012VSL-avr-sm 维修电路原理图.pdf

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1、SERVICE MANUALAUDIO/VIDEO CONTROL RECEIVERNo.21005Jul. 2001COPYRIGHT 2001 VICTOR COMPANY OF JAPAN, LTD.RX-7012VSLRX-7012VSL A US UTAustraliaSingaporeTaiwanArea SuffixContentsSafety precautions -1-2Disassembly method -1-3Adjustment method -1-8Description of major ICs -1-921D I G I T A LCONTROL+231564

2、897/P0+1010BASS BOOSTEFFECTMENUENTERTEST+ REARL SOUND SUB WOOFER + REARR +MUTINGCHTV VOLPLAYSTOP/REWFF/VOLUMECA TV/DBSCONTROLTV/VIDEORECPAUSEPAUSERETURNFM MODE100+CONTROLA/V CONTROL RECEIVERCATV/DBSVCRTVAUDIODSPMODEINPUTON/OFFDVD MUILTIDVDCDTAPE/CDRTREBLETV/DBSVCRPHONOFM/AMBASSSURROUNDANALOG/DIGIT A

3、LSLEEP+ CENTER TUNING+DVDVCRTV SOUND/DBSADJUSTAUDIO/VIDEO CONTROL RECEIVERSETTINGMASTER VOLUMECONTROLDOWNUPCDTAPE/CDRSOURCE NAMEBASS BOOSTINPUT ANALOG/DIGITALSPEAKERS ON/OFFDSP MODEPHONESSURROUND ON/OFFFM/AM TUNINGSTANDBYFM/AM PRESETFM MODEMEMORYINPUT ATTFM/AMD I G I T A LD I G I T A LSURROUNDDVD MU

4、LTIPHONOSOURCE 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.RadioFans.CN 收音机爱 好者资料库RX-7012VSL1-21. This design of this product contains special hardware and many circuits and comp

5、onents specially for safety purposes. 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. A

6、lterations of the design or circuitry 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 damag

7、e resulting therefrom.3. Many 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 high

8、er voltage, wattage, etc. Replacement 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 subs

9、titute replacement which does 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 s

10、eparated from live parts, high 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-assemb

11、ling.5. Leakage current check (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 o

12、perate without danger of electrical 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

13、a return path to the chassis, 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

14、resistor paralleled by a 0.15 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 cha

15、ssis, and measure the AC voltage 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

16、 standards.2. It is the legal 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

17、 provided, check setting for 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 t

18、he case of preforming repair 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.

19、When replacing them, be sure to use the parts of the same type and rating as specified by the manufacturer. (Except the J&C version)RadioFans.CN 收音机爱 好者资料库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

20、the top cover from behind in the direction of the 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

21、arrow.Remove the twenty eight screws E attaching 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 t

22、he card wire from connector CN402 on the audio 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 b

23、ody. Detach the front panel assembly toward the 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 direct

24、ion of the arrow.Remove the two screws E attaching the rear panel on the back of the body.Fig.1Fig.2Fig.3Fig.4A 2A 2BTop coverCPower supply boardAudio boardCN402Main boardTie bandDEEFEFFCord stopperCFront panel assemblyFront panel assemblyDRear panelCN201FEEEEERX-7012VSL1-4Prior to performing the fo

25、llowing procedure, remove the top cover and the 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 b

26、oard.Disconnect the tuner board from connector CN411 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 bandDSP boardDVD boardVideo boardTuner boardAudioinput boardDSP boardCN481CN441CN431CN421CN481CN421CN431CN441C

27、N411Tie bandCN421CN431CN441Audioinput boardDVD boardVideo boardTuner boardAudio boardCN461S 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

28、CN402 on the audio board.Disconnect the relay board from 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.

29、2.3.4.5.Remove the ten screws K and four screws L attaching 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.Di

30、sconnect the harness from connector CN241 and CN203 on 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 board re

31、ar sideMain boardHeat sink CN291CN203CN491HGCN471CN385CN402CN472Power 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 ot

32、her harnesses connected to the power / fuse board.1.2.Removing 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 harness

33、es connected to FW201 on the power transformer board.Remove 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

34、 the tie band fixing the harness.Unsolder the six harnesses connected to the power transformer.Fig.13Fig.14Powersupply boardCN251Power transformerNSolder pointsNSolder pointsSolderpointsOPower / fuse boardPower cordPower transformerboardFW201Power transformerSolder pointsSolderpointsTie bandPower co

35、rdVoltage select boardVoltage selectorSolder pointsRX-7012VSL1-7Prior 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 a

36、ttaching the power switch board.Disconnect the harness from 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 operat

37、ion switch panel toward the front.Release the two hook attaching 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 headph

38、one jack of the power supply board on the front side of the 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 su

39、pply board.Remove the three screws P attaching the power supply 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 assemb

40、lyNutMASTER VOLUME knobSystem control boardPower switch boardRRCN714QJointJointJointJointJointJointHookHookOperation switch panelJointJointFig.15Fig.16CN241Power supplyboardNutHeadphone jackHeadphone jackTie bandSolder pointsPPPSolder pointsCN201CN291HookCN203RX-7012VSL1-8Adjustment method1.Set the

41、volume control to minimum during this adjustment.(No signal & 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 be

42、tween TP301s B216 and B217 (Lch) And,connect it between TP302s 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 range FM 87.5MHz108.0MHz AM(MW) 522kHz1629kHz : (A model) 531kHz1602kHz (9kHz step) : (US,U

43、T model) 530kHz1600kHz (10kHz step) : (US,UT model)Tuner sectionPower amplifier sectionTP302(Rch)VR301 (Lch)VR302 (Rch)Heat sinkAdjustment of idling currentMeasurement locationTP301(Lch) , TP302(Rch)Adjustment partVR301(Lch) , VR302(Rch)AttentionThis adjustment does not obtain a correct adjustment v

44、alue immediately after the amplifier isused (state that an 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

45、even if it is finished to turn variable resistance (VR301,VR302) in the direction of counterclockwise. TP301(Lch)RX-7012VSL1-9DLCKS terminalLLHHDLONterminalLHLH DLL clock settingSCKI input (DLL circuit OFF)Four times XI clockThree times XI clockSix times XI clock1234567811121314151618192021222324252

46、627,28293132,333435363738,3940414243444546474849505152535461626370717280818289909192,939495969798,99100Pin No.SymbolI/OFunctionRSTMIMDMICSMILPMIDIOMICKMIACKFI03IRQVSSLRCKABCKASDO02SD03LRCKBBCKBSDT0SDT1VDDLRCKOABCKOATEST0,1LRCKOB,BCKOB,TXOTEST2,3RXVSSTSTSUB0FCONTTSTSUB1,TSTSUB2PDOVDDAPLONAMPIAMPOCKIV

47、SSACKOLOCKVSSWROECEVDDIO70VSSAD07VDDAD816VSSPO07VDDDLLPFODLON,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)Microcompu

48、ter interface chip select input terminalMicrocomputer interface latch pulse inputMicrocomputer interface data I/O terminalMicrocomputer interface clock input terminalMicrocomputer interface acknowledge output terminalFlag input terminal 03Interrupt input terminalDigital ground terminalAudio interfac

49、e 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 supply for digital

50、circuitAudio interface LR clock output terminal AAudio interface bit clock output terminal ATest input terminal 0/1 (L:test H:operation usually)Non connectTest input terminal (L:test H:operation usually)SPDIF input terminalGround terminal for digital circuitTest sub input terminal 0 (L:test H:operat