NAD-705-rec-sm维修电路原理图.pdf

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1、Q 2 W NAD O m r*tft W U LLI W cc 705 RECEIVER RadioFans.CN 收音机爱 好者资料库 CONTENTS Page 4 ? ServiceInstruction 5 ? Specifications 6-7 ? Rear/Front Panel 8 ? RemoteControl Transmitter 9 ? Tuner Adjustment Points 10 ? Main AdjustmentPoints 11-12 ? InstrumentationConnection Diagram 13-14 ? AdjustmentProced

2、ure 15-16 ? MainSchematicDiagram 17-18 ? Main PCB Layout 19-20 ? Tuner SchematicDiagram 21-22 ? Tunerscansupordown in frequencyandstopsatthenextstrongstation . 7.TuneUp/Down.Tunesupordowninfrequencybysmall steps.Thesebuttonsalsoalterthepresetnumberwhenyou arestoringfrequenciesinthepresets . 8.Volume

3、Up/Down.Thesebuttonsactivateasmallmotor torotate thereceiversVolumecontrol . 9.NumericKeypad(0 to 9) .Press thesebuttonstoentera presetnumberoratuningfrequencyThenpressENTERto tellthereceiverthatyou havecompletedyourselection. The tuninglogicrecognizestwo-digitentriesaspreset numbers and3to5digitnum

4、bersasbroadcastfrequencies. Iftheentry isinvalid(e.g.apresetnumberabove39) .thetunedfrequency willnotchange. 10.Enter.Pressthisbuttontocompletea numerickeypad entry. 11.InputSelect(FM,AM, Video,Phono,Aux,Tape1, Tape2,CD).Thesewhitebuttonsselecttheinputforlistening TAPERECORDER CONTROLS Thesebuttonso

5、peratethecorrespondingfunctions on certainNADtaperecorders. 12.Stop. 13.Rec(Recording). 14.Tape2.SelectsthereceiversTape2inputforlistening . 15.Tape1.SelectsthereceiversTape1inputforlistening . 16.(FastForward). 18.Pause. 19.Play. RadioFans.CN 收音机爱 好者资料库 TC404 T T406 me T407 Fo-1 TP3 O TUNERADJUSTME

6、NTPOINTS T408 T409 T403 10 Wl T402 SFR402 p ? FL40S OTP2 0 O OTP1 (VT) (GNO) OTP4 T404 OTP5 T401 Figure1 D 077 ? TP8 (TUNING) ? O L402 IC403 TC405 SFR403 E) RadioFans.CN 收音机爱 好者资料库 AmplifierSection 1.Power output offset adjustment a.Atopenload,DCmeterconnected speakerswitchtoAposition. b.Adjust SFR1

7、01,letthereadingas c.AdjustSFR102,letthereadingas b. c. d. e. Atopenload,DCmeter Adjust SFR103,letthe Atopenload,DCmeter Adjust SFR104,letthe MAINADJUSTMENTPOINTS Figure2. tospeakerterminalA, 0+-25mV.(L-channel).(Fig. 2) 0+-25mV.(R-channel).(Fig. 2) 2.Quiesent CurrentAdjustment a.Allowatleast3minute

8、sburninbeforeperformingthisadjustment. connectedtoCN-15base.(Fig.2) readingas4.4mV.(I=20mA,+-5mA),(L-channel)(Fig.11) connectedtoCN-14base.(Fig2) readingas4.4mV.(I=20mA,+-5mA),(L-channel)(Fig.11) RadioFans.CN 收音机爱 好者资料库 SPEAKERTERMINALA Figure5 D Figure6 Figure7 INSTRUMENTATION CONNECTION DIAGRAM Fi

9、gure3 AMSTANDARDSIGNALGEN. ? SCOPE TAPE1OUT ? 2 000 00 ? 00 SET P FMSTANDARDSIGNALGEN 100.7M 0000 DCMETER ? OCMETER +T 00o 00 ? 00 ? 0 0 TAPE2OUT n+ SET AMANTIN -FMANTIN FREQUENCYCOUNTER ? FM/AMSTANDARDSIGNALGENVTVM TAPE 2OUT SET D SCOPE FMANTIN 00 004 n 00 00 Figure8 RadioFans.CN 收音机爱 好者资料库 INSTRUM

10、ENTATIONCONNECTIONDIAGRAM(Cont) SIGNALGEN. DCMETER OO oa TP1 TP2 SET TAPE2OUT Figure12 DISTORTIONMETER D FMANTIN SET DCMETER Figure11 AM/FMS.G. Figure 10 RadioFans.CN 收音机爱 好者资料库 A:AM SECTION 1.V.C .O.ADJUSTMENT. A.MEASURETHEVOLTAGE BETWEENTP7ANDTP4(GROUND).(FIG4). B.SELECTAMMODE,ANDSETTHEUNIT UNDERT

11、EST TO520KHZ(UL, CSA).(522KHZUK,AY,EU). C.ADJUSTT406UNTILTHEVOLTAGE BETWEENTP7ANDTP4IS INTHE RANGE0.9VTO 1.1V. D.SET THEUNITUNDERTEST TO1610KHZ(UL,CSA) (1611KHZUK,AY,EU). CHECK THAT THEVOLTAGE BETWEENTP4ANDTP7ISINTHERANGE 7.35VTO7.65V. 2.SENSITIVITYADJUSTMENT. A.CONNECTTHEUNITUNDERTEST AS SHOWNINFIG

12、.5.MAKESURE THATTHESIGNALGENERATORISCONNECTEDVIAA22PCAPACITOR. B.SET THESIGNALGENERATORANDUNITUNDERTEST TO600KHZ (UL,CSA)(603KHZUK,AY,EU),30dBUv. C.ADJUSTT405FORMAXIMUMOUTPUTLEVEL. D.SETTHESIGNALGENERATORANDUNITUNDERTEST TO1400KHZ (UL,CSA)(1404KHZUK,AY,EU). E.ADJUSTTC404FORMAXIMUMOUTPUT. 3.IFTRACKIN

13、G ADJUSTMENTPROCEDURE A.USINGTHETESTSET-UPDESCRIBEDABOVE(FIG.5)SETTHESIGNAL GENERATORANDUNITUNDER TEST TO600KHZ(UL,CSA) (603KHZUK,AY,EU),30dBUv. B.ADJUSTT407FORMAXIMUMOUTPUT. B:FMSECTION. 1.V .C .O .ADJUSTMENT. A.CONNECTADCVOLTMETERTOTP7ANDTP4(GND)(FIG.4). B.SET THEUNITUNDERTEST TO87.5MHZFMMODE. C.A

14、DJUSTL402UNTIL THEVOLTAGEMEASUREDISINTHE RANGE 3 .0V TO3.1V. D.SET THEUNITUNDERTESTTO108MHZ.CHECKTHEVOLTAGEMEASURED ISINTHE RANGE22VTO25V. 2.7 .2MHZREFERENCEFREQUENCYADJUSTMENT. A.CONNECTAFREQUENCYCOUNTERTOTP5(FMOSC)AND GROUND (FIG7). B.SET THEUNITUNDERTEST TO90MHZFM MODE. C.ADJUSTTC405FOR AMEASURED

15、 FREQUENCYOF100.7MHZ+/-3HZ. RadioFans.CN 收音机爱 好者资料库 3.SENSITIVITYADJUSTMENT 4.IFTRACKING. A.SETTHESIGNAL 60dBuV. B.MEASURETHE C.ADJUSTT408 D.MONITORTHE E.ADJUSTT409 F.REPEAT FROM ACHIEVED. 5.SIGNALMETER ADJUSTMENT. 6.SEPARATIONADJUSTMENT. ADJUSTMENTPROCEDURE(Cant.) A.SET THESIGNALGENERATORAND UNITUN

16、DERTEST TO98MHZFMMODE. CONNECTTHESIGNALGENERATORTOTHEFM INPUT JACK(FIG.6). SET THESIGNALGENERATOROUTPUTTO6dBuV,1KHZMODULATION. B.CONNECTANOSCILLOSCOPETO TAPE2OUTPUT. C.ADJUST7401,T402,T403FORMAXIMUMOUTPUT.REDUCE THE SIGNAL GENERATOROUTPUT LEVELIFNECESSARY. GENERATORAND UNITUNDERTESTTO98MHZ FMMODE, V

17、OLTAGE BETWEENTP1ANDTP2.(FIG10). UNTILTHEVOLTAGEIS INTHERANGE-50mVTO+50mV. DISTORTIONFROM THE SIGNAL AT TAPE2(FIG10). FORDISTORTION UNDER0.15%. (C)ABOVEUNTIL THEOPTIMUMDISTORTIONHASBEEN A.SET THESIGNALGENERATORANDUNITUNDERTESTTO98MHZFMMODE, 60dBuV. B.ADJUST SFR402UNTILTHELASTSEGMENTOF THE SIGNALMETE

18、RJUST LIGHTSUP. A.SETTHESIGNALGENERATORAND UNITUNDERTEST TO.98MHZFM MODE, 60dBuV,LEFT ONLYMODULATION. B.MONITORTHEOUT OF THE RIGHTCHANNELTAPE2.(FIG8) C.ADJUST SFR403 FORMINIMUMSIGNAL. RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者

19、资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 RadioFans.CN 收音机爱 好者资料库 24 M2 Me

20、chanicalExplode M1 M M9 M9b 12 M14 MI6 -hhh1117 20 48 49 7 M7 3 68 11.7 M67 e RadioFans.CN 收音机爱 好者资料库 ExplodedView RadioFans.CN 收音机爱 好者资料库 EXPLODEDVIEWPARTS Ref.No.Part No.Description Mla0001079705Display windowassembly Ml1006079705Functionknob M21005079705Volumeknob M31013079705Seriesindicator(5Pie

21、ces) M42010079705Functionshaft M51007079705 Balance/Bass/Trebleknob(3Pieces) M61001079705Frontpanel M789613008009(Taptite-B)CUP3008ZN3A(25Pieces) M8C145216520HeadphonejackPCBassembly M91015079705Displayplate M9aC146216720DisplayPCB assembly M9b2006079705Displayholder M9cC046216730LampPCBassembly M10

22、1012079705Push button(B)(2Pieces) M1187413010147(Taptite-P)BID3010 WF14ZN3A M121008079705Powerbutton M131017079705Pushbutton(C)(2Pieces) M142002079705Power spring M152001079705Mainspring M161011079705Pushbutton(A)(2Pieces) M171010079705Enterbutton M181014079705Scanbutton (2Pieces) M191009079705Stand

23、ardbutton(3Pieces) M2087413010007(Taptite-P)BID3010ZN3A(12Pieces) M21C145216550VolumePCBassembly M23C145216540PushPCBassembly M24C146216710FrontPCBassembly M278941300800 9(Taptite-B)BID3008ZN3A(4Pieces) M282008079705TuningPCBbracket M292013079705Mainheatsink M312021079705Therswitch holder (2Pieces)

24、M31a8741300800 7(Taptite-P)BID3008ZN3A(2Pieces) M3289613012009(Taptite-B)CUP3012ZN3A (4Pieces) M33C145216510MainPCBassembly M357159705001Remotetransmitterassembly M368241300800 2(Machine-ISO)BID3008ZN3A(10Pieces) M372016040082Heat sinkLL(2Pieces) M382010011200Heat sink(2Pieces) M402016079705Bush M41

25、2012079705Shaft M422020079705PCBwasher(2Pieces) M432015079705Earth plate M44C145216510MainPCBassembly M45C146216740SUBtransformerPCBassembly M462007079336PCBsupport(2Pieces) M472004079705BottomchassisL M481016079705Foot (4Pieces) M492022079705Footcushion(4Pieces) M502005079705 BottomchassisR M51C146

26、216740TunerPCBassembly M522007079705Side bracket M532024079705 33 Shieldcase RadioFans.CN 收音机爱 好者资料库 Ref.No.Part No.Description M542025079705Shield cover M552026079705Shield plate M562017079705HeatsinkA(6Pieces) M572000000908 InsulatorSIL.TO-3P M581003079705Topcover M5986424006006(Taptite-S)BID4006Z

27、N3K(4Pieces) M60C145216530SpeakerAterminalPCBassembly M612019079705Speakerearthplate M6289423008009(Taptite-B)BID3008ZN3K(8Pieces) M631002079705Rearpanel M642059068803Shortpin(2Pieces) M652047068801Lugterminal7.2Q M660009068801Gndterminalassembly M6786413008006(Taptite-S)BID3008ZN3A(2Pieces) M688661

28、4006006(Taptite-S)CUP4006ZN3A(4Pieces) M698742301000 7(Taptite-P)BI,D3010ZN3K(13Pieces) M70C046216750ACoutletPCB VERSIONSCHART: VERSIONVOLTAGECOUNTRY UL,CSA120VNorthAmerica UK240VUnitedKingdom AY240VAustralia/NewZealand EU220VScandinavia RadioFans.CN 收音机爱 好者资料库 35 ELECTRICALPARTS LIST MainPCBAssembl

29、y Symbol-No-.Ref.No.PartNo.Description PCBOARD 41452165114145216511PCBnocomponents C145216511C145216511PCBassembly ICS IC1NE5532DD41595532ANIC,PhonoAmp. IC2NJM2068DD4159020684IC,BufferAmp IC3NJM2068DD4159020684IC,PreAmp IC4TC9163N415309163NIC,FunctionSwitch IC101TA7317P415307317PIC,ProtectionCircuit

30、 IC102LB1642B415201642BIC,MotorDrive IC301MC7815CT4157078153IC,Regulator IC302MC7915CT4157079153IC,Regulator IC303MC7812CT4157078123IC,Regulator TRANSISTORS Q1,22SC2878A410522878AMuteswitching Q101,1022SC2240BL4105222402RCHpowerAmp Q1032SA733P410000733PLCH powerAmp Q1042SA733P410000733PR CHpowerAmp

31、Q1052SA733P410000733PLCHpowerAmp Q1062SA733P410000733PR CHpowerAmp Q1072SA970BL4105009702LCHpowerAmp Q1082SA970BL4105009702R CH powerAmp Q1092SC37894100237890LCHpowerAmp Q1102SC37894100237890RCHpowerAmp Q1112SC37894100237890LCHpower Amp Q1122SC37894100237890RCHpowerAmp Q1132SD669A410030669ALCHpowerA

32、mp Q1142SD669A410030669A_RCHpowerAmp Q1152SB649A410010649ALCHpowerAmp Q1162SB649A410010649ARCHpowerAmp Q1172SC35194100023519LCHpowerAmp Q1182SC35194100023519RCHpowerAmp Q1192SA13864100013860LCHpowerAmp Q1202SA13864100013860RCHpowerAmp Q1212SA970BL4105009702Switching Q1222SA970BL4105009702Switching Q

33、1232SA970BL4105009702Switching Q1242SA970BL4105009702Switching Q125-1272SC945P410020945PSoftclipincircuitcontrol Q1282SA733P410000733PLCHpowerAmp Q1292SC945P410020945PSoftclipincircuit Q1302SA733P410000733PLCHpowerAmp Q1312SA733P410000733PLCHpower Amp Q1322SC945P410020945PSoftclipincircuit Q133,1342

34、SA970BL4105009702Switching Q3012SA970BL4105009702Switching Q302,3042SC2240BL4105222402RCHpower Amp Q3032SA970BL4105009702Switching Q3052SD669A410030669ALCHpowerAmp Q3062SB649A410010649A-RCHpowerAmp Q3072SC2240BL4105222402LCHpower Amp Q308,3092SC945P410020945PSoftclipincircuit DIODES D1-41N4148412014

35、14801N4148 RadioFans.CN 收音机爱 好者资料库 36 f SymbolNo.Ref.No.PartNo.Description D5RD30EB24120523005Zener,RD30EB2 0101-1041N41484120141480 1N4148 D105-1061SS17641209017601SS176 D107,1081N41484120141480 1N4148 D111,1121SS17641209017601SS176 D113-1161N41484120141480 1N4148 D118RD2.7EB24120520275Zener,RD2.7E

36、B2 D118orRD2.7EB14120510275Zener,RD2.7EB1 D301,302GBU6D41300GBU6DGBU6D D303,304W02M4130150022W02M D305,306SF5D41410405D410SCR.SF5D41 D307RD22EB24120522205Zener,RD22EB2 D308RD27EB24120522705Zener,RD27EB2 D309RD30EB24120523005Zener,RD30EB2 D310,3111N414841201414801N4148 D412-4141N414841201414801N4148

37、COILS L1,23.7mH7089705098Ring coil L101,1021.8uHPC99014320189131Audiocoil FUSES F305,306T500mA/250V5266050060FuseUL/CSA(UL,CSA) F305,306T500mA/250V5267050060Fuse semk(UK) F307,308T250mA/250V5266025060 FuseUL/CSA(UL,CSA) F307,308T250mA/250V5267025060Fuse semk(UK) F309T500mA/250V5266050060FuseUL/CSA(U

38、L,CSA) F309T500mA/250V5267050060Fuse semkT500mA/250(UK) CAPACITORS C1,251541002255154100225EL.CAP lOuF/25V,+-207 C3,473065221157306522115Mult.CAP 220uF/50V,+-107 C5,651542212105154221210EL. CAP220uF/lOV,+-207 C7,850912435135091243513PL. CAP.024uF,+-57 C9,1050916825135091682513PL.CAP .0068uF,+-57 C11

39、,1251541002255154100225EL.CAP lOuF/25V,+-207 C13,1450911525135091152513PL.CAP .0015uF,+-57 C15,1673071103157307110315Mult.CAP .0luF/16V,+-107 C17-3073065101157306510115Mult.CAP 100uF/50V,+-107 C35-3851141045505114104550Mylar. CAP.luF,+-5% C39,4073065101157306510115Mult.CAP 100uF/50V,+-107 C41,427307

40、1103157307110315Mult.CAP .0luF/50V,+-107 C43,4451541002255154100225EL.CAPlOuF/25V,+-207 C45,4673065221157306522115Mult.CAP 220uF/50V,+-107 C47,4851541002255154100225EL.CAP lOuF/25V,+-207 C49,5051544702165154470216EL.CAP 47uF/16V,+-207 C51,5273071103157307110315Mult.CAP.0luF/16V,+-107 C53,54515410121

41、05154101210EL.CAP100uF/IOV,+-207 C55,5651141835505114183550Mylar.CAP.018uF/50V,+-5 C57,585113474563511,3474563EL.CAP.47uF/63V,+-57 C59,6051141835505114183550Mylar.CAP.018uF/50V,+-57 C61,6251141045505114104550Mylar.CAP.luF/50V,+-57 C63,6473065681157306568115Mult.CAP680uF/50V,+-107 C65,667307110315730

42、7110315Mult.CAP.0luF/16V,+-107 C6751141045505114104550Mylar.CAP.luF/50V,+-57 RadioFans.CN 收音机爱 好者资料库 37 SymbolNo.Ref.No.Part No.Description C6873069330527306933052Mult.CAP33uF/50V,+-20% C101,10251541002255154100225EL.CAPlOuF/25V,+-20% C103,10473065561157306556115Mult.CAP560uF/50V,+-10% C105,10673069

43、470527306947052Mult.CAP47uF/50V,+-5% C107,10873065102157306510215Mult.CAP.OOluF/50V,+-5% C109,11073066104457306610445Mult.CAP.luF/50V,+-5% C111,11251541022105154102210EL.CAP1000uF/IOV,+-20% C113,11473069220527306922052Mult.CAP22uF/50V,+-5% C115,11673069220527306922052Mult.CAP22uF/50V,+-5% C117,11873

44、065221157306522115Mult.CAP220uF/50V,+-10% C123,12451544702255154470225EL.CAP47uF/25V,+-20% C125-12851141045505114104550Mylar.CAP.luF,+-5% C129-13251541002635154100263EL.CAPlOuF/63V,+-20% C135,13673071103157307110315Mult.CAP.OluF/16V,+-10% C137,13873078222157307822215Mult.CAP.0022uF/16V,+-10% C141,14

45、251541012105154101210EL.CAP100uF/IOV,+-20% C14351541002255154100225EL.CAPlOuF/25V,+-20% C144,14551544702165154470216EL.CAP47uF/16V,+-20% C14651542292505154229250EL.CAP2.2uF/50V,+-20% C14751541002255154100225EL.CAPlOuF/25V,+-20% C149,15051141045115114104511MylarCAP.luF/100V,+-5% C153,1547306922052730

46、6922052Mult.CAP22uF/50V,+-5% C301,30251041034415104103441CER.CAP.OluF/500V,+-20% C303,30451541032505154103250EL.CAP10000uF/50V,+-20% C30551041034415104103441CER.CAP.OluF/500V,+-20% C306,30751541022105154102210EL.CAP680uF/80V,+-20% C308,30951544702105154470210EL.CAP47uF/100V,+-20% C310,31151544702635

47、154470263EL.CAP47uF/63V,+-20% C312,31351541002505154100250EL.CAPlOuF/50V,+-20% C31451041034525104103452CER.CAP.0luF,+80/-20% C315,31651541022355154102235EL.CAP1000uF/35V,+-20% C317-31951541002255154100225EL.CAPlOuF/25V,+-20% RESISTORS R1,240501222524050122252RES.2.2Kohm,1/6W R3,440501334524050133452

48、RES.330Kohm,1/6W R5,640501563524050156352RES.56K ohm,1/6W R7,840501181624050118162RES.180ohm,1/6W R9,1040501134624050113462RES.130Kohm,1/6W R11,1240501113624050111362RES.11Kohm,1/6W R13,1440501820524050182052RES.82ohm,1/6W R15,1640501223524050122352RES.22Kohm,1/6W R17,1840501102524050110252RES.1Kohm

49、,1/6W R19,2040501104524050110452RES.100Kohm,1/6W R21,2240501102524050110252RES.1Kohm,1/6W R23,2440501104524050110452RES.100Kohm,1/6W R25,2640501102524050110252RES.1Kohm,1/6W R27,2840501104524050110452RES.100Kohm,1/6W R29,3040501102524050110252RES.1Kohm,1/6W R31,3240501104524050110452RES.100Kohm,1/6W R33,3440501102524050110252RES.1K ohm,1/6W R35,3640501104524050110452RES.100Kohm,1/6W R37,3840501102524050110252RES.1Kohm,1/6W R39-4240501222524050122252RES.2.2Kohm,1/6W R47,4840501104524050110452RES.100Kohm,1/6W R49,5040501224524050122452RES.220Kohm,1/6W R51,52405014