NAD-705-rec-sm 电路图 维修手册.pdf

《NAD-705-rec-sm 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《NAD-705-rec-sm 电路图 维修手册.pdf（50页珍藏版）》请在收音机爱好者资料库上搜索。

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. TC404 T T406 me T407 Fo-1 TP3 O TUNERADJUSTMENTPOINTS T408 T409 T403

6、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) AmplifierSection 1.Power output offset adjustment a.Atopenload,DCmeterconnected speakerswitchtoAposition. b.Adjust SFR101,letthereadingas c.AdjustSFR102,letthereadinga

7、s 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.Allowatleast3minutesburninbeforeperformingthisadjustment. connected

8、toCN-15base.(Fig.2) readingas4.4mV.(I=20mA,+-5mA),(L-channel)(Fig.11) connectedtoCN-14base.(Fig2) readingas4.4mV.(I=20mA,+-5mA),(L-channel)(Fig.11) SPEAKERTERMINALA Figure5 D Figure6 Figure7 INSTRUMENTATION CONNECTION DIAGRAM Figure3 AMSTANDARDSIGNALGEN. ? SCOPE TAPE1OUT ? 2 000 00 ? 00 SET P FMSTAN

9、DARDSIGNALGEN 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 INSTRUMENTATIONCONNECTIONDIAGRAM(Cont) SIGNALGEN. DCMETER OO oa TP1 TP2 SET TAPE2OUT Figure12 DISTORTIO

10、NMETER D FMANTIN SET DCMETER Figure11 AM/FMS.G. Figure 10 A:AM SECTION 1.V.C .O.ADJUSTMENT. A.MEASURETHEVOLTAGE BETWEENTP7ANDTP4(GROUND).(FIG4). B.SELECTAMMODE,ANDSETTHEUNIT UNDERTEST TO520KHZ(UL, CSA).(522KHZUK,AY,EU). C.ADJUSTT406UNTILTHEVOLTAGE BETWEENTP7ANDTP4IS INTHE RANGE0.9VTO 1.1V. D.SET THE

11、UNITUNDERTEST TO1610KHZ(UL,CSA) (1611KHZUK,AY,EU). CHECK THAT THEVOLTAGE BETWEENTP4ANDTP7ISINTHERANGE 7.35VTO7.65V. 2.SENSITIVITYADJUSTMENT. A.CONNECTTHEUNITUNDERTEST AS SHOWNINFIG.5.MAKESURE THATTHESIGNALGENERATORISCONNECTEDVIAA22PCAPACITOR. B.SET THESIGNALGENERATORANDUNITUNDERTEST TO600KHZ (UL,CSA

12、)(603KHZUK,AY,EU),30dBUv. C.ADJUSTT405FORMAXIMUMOUTPUTLEVEL. D.SETTHESIGNALGENERATORANDUNITUNDERTEST TO1400KHZ (UL,CSA)(1404KHZUK,AY,EU). E.ADJUSTTC404FORMAXIMUMOUTPUT. 3.IFTRACKING ADJUSTMENTPROCEDURE A.USINGTHETESTSET-UPDESCRIBEDABOVE(FIG.5)SETTHESIGNAL GENERATORANDUNITUNDER TEST TO600KHZ(UL,CSA)

13、(603KHZUK,AY,EU),30dBUv. B.ADJUSTT407FORMAXIMUMOUTPUT. B:FMSECTION. 1.V .C .O .ADJUSTMENT. A.CONNECTADCVOLTMETERTOTP7ANDTP4(GND)(FIG.4). B.SET THEUNITUNDERTEST TO87.5MHZFMMODE. C.ADJUSTL402UNTIL THEVOLTAGEMEASUREDISINTHE RANGE 3 .0V TO3.1V. D.SET THEUNITUNDERTESTTO108MHZ.CHECKTHEVOLTAGEMEASURED ISIN

14、THE RANGE22VTO25V. 2.7 .2MHZREFERENCEFREQUENCYADJUSTMENT. A.CONNECTAFREQUENCYCOUNTERTOTP5(FMOSC)AND GROUND (FIG7). B.SET THEUNITUNDERTEST TO90MHZFM MODE. C.ADJUSTTC405FOR AMEASURED FREQUENCYOF100.7MHZ+/-3HZ. 3.SENSITIVITYADJUSTMENT 4.IFTRACKING. A.SETTHESIGNAL 60dBuV. B.MEASURETHE C.ADJUSTT408 D.MON

15、ITORTHE E.ADJUSTT409 F.REPEAT FROM ACHIEVED. 5.SIGNALMETER ADJUSTMENT. 6.SEPARATIONADJUSTMENT. ADJUSTMENTPROCEDURE(Cant.) A.SET THESIGNALGENERATORAND UNITUNDERTEST TO98MHZFMMODE. CONNECTTHESIGNALGENERATORTOTHEFM INPUT JACK(FIG.6). SET THESIGNALGENERATOROUTPUTTO6dBuV,1KHZMODULATION. B.CONNECTANOSCILL

16、OSCOPETO TAPE2OUTPUT. C.ADJUST7401,T402,T403FORMAXIMUMOUTPUT.REDUCE THE SIGNAL GENERATOROUTPUT LEVELIFNECESSARY. GENERATORAND UNITUNDERTESTTO98MHZ FMMODE, VOLTAGE BETWEENTP1ANDTP2.(FIG10). UNTILTHEVOLTAGEIS INTHERANGE-50mVTO+50mV. DISTORTIONFROM THE SIGNAL AT TAPE2(FIG10). FORDISTORTION UNDER0.15%.

17、(C)ABOVEUNTIL THEOPTIMUMDISTORTIONHASBEEN A.SET THESIGNALGENERATORANDUNITUNDERTESTTO98MHZFMMODE, 60dBuV. B.ADJUST SFR402UNTILTHELASTSEGMENTOF THE SIGNALMETERJUST LIGHTSUP. A.SETTHESIGNALGENERATORAND UNITUNDERTEST TO.98MHZFM MODE, 60dBuV,LEFT ONLYMODULATION. B.MONITORTHEOUT OF THE RIGHTCHANNELTAPE2.(

18、FIG8) C.ADJUST SFR403 FORMINIMUMSIGNAL. 24 M2 MechanicalExplode M1 M M9 M9b 12 M14 MI6 -hhh1117 20 48 49 7 M7 3 68 11.7 M67 e ExplodedView EXPLODEDVIEWPARTS Ref.No.Part No.Description Mla0001079705Display windowassembly Ml1006079705Functionknob M21005079705Volumeknob M31013079705Seriesindicator(5Pie

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

20、1012079705Push button(B)(2Pieces) M1187413010147(Taptite-P)BID3010 WF14ZN3A M121008079705Powerbutton M131017079705Pushbutton(C)(2Pieces) M142002079705Power spring M152001079705Mainspring M161011079705Pushbutton(A)(2Pieces) M171010079705Enterbutton M181014079705Scanbutton (2Pieces) M191009079705Stand

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

22、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

23、2012079705Shaft M422020079705PCBwasher(2Pieces) M432015079705Earth plate M44C145216510MainPCBassembly M45C146216740SUBtransformerPCBassembly M462007079336PCBsupport(2Pieces) M472004079705BottomchassisL M481016079705Foot (4Pieces) M492022079705Footcushion(4Pieces) M502005079705 BottomchassisR M51C146

24、216740TunerPCBassembly M522007079705Side bracket M532024079705 33 Shieldcase Ref.No.Part No.Description M542025079705Shield cover M552026079705Shield plate M562017079705HeatsinkA(6Pieces) M572000000908 InsulatorSIL.TO-3P M581003079705Topcover M5986424006006(Taptite-S)BID4006ZN3K(4Pieces) M60C1452165

25、30SpeakerAterminalPCBassembly M612019079705Speakerearthplate M6289423008009(Taptite-B)BID3008ZN3K(8Pieces) M631002079705Rearpanel M642059068803Shortpin(2Pieces) M652047068801Lugterminal7.2Q M660009068801Gndterminalassembly M6786413008006(Taptite-S)BID3008ZN3A(2Pieces) M6886614006006(Taptite-S)CUP400

26、6ZN3A(4Pieces) M698742301000 7(Taptite-P)BI,D3010ZN3K(13Pieces) M70C046216750ACoutletPCB VERSIONSCHART: VERSIONVOLTAGECOUNTRY UL,CSA120VNorthAmerica UK240VUnitedKingdom AY240VAustralia/NewZealand EU220VScandinavia 35 ELECTRICALPARTS LIST MainPCBAssembly Symbol-No-.Ref.No.PartNo.Description PCBOARD 4

27、1452165114145216511PCBnocomponents C145216511C145216511PCBassembly ICS IC1NE5532DD41595532ANIC,PhonoAmp. IC2NJM2068DD4159020684IC,BufferAmp IC3NJM2068DD4159020684IC,PreAmp IC4TC9163N415309163NIC,FunctionSwitch IC101TA7317P415307317PIC,ProtectionCircuit IC102LB1642B415201642BIC,MotorDrive IC301MC7815

28、CT4157078153IC,Regulator IC302MC7915CT4157079153IC,Regulator IC303MC7812CT4157078123IC,Regulator TRANSISTORS Q1,22SC2878A410522878AMuteswitching Q101,1022SC2240BL4105222402RCHpowerAmp Q1032SA733P410000733PLCH powerAmp Q1042SA733P410000733PR CHpowerAmp Q1052SA733P410000733PLCHpowerAmp Q1062SA733P4100

29、00733PR CHpowerAmp Q1072SA970BL4105009702LCHpowerAmp Q1082SA970BL4105009702R CH powerAmp Q1092SC37894100237890LCHpowerAmp Q1102SC37894100237890RCHpowerAmp Q1112SC37894100237890LCHpower Amp Q1122SC37894100237890RCHpowerAmp Q1132SD669A410030669ALCHpowerAmp Q1142SD669A410030669A_RCHpowerAmp Q1152SB649A

30、410010649ALCHpowerAmp Q1162SB649A410010649ARCHpowerAmp Q1172SC35194100023519LCHpowerAmp Q1182SC35194100023519RCHpowerAmp Q1192SA13864100013860LCHpowerAmp Q1202SA13864100013860RCHpowerAmp Q1212SA970BL4105009702Switching Q1222SA970BL4105009702Switching Q1232SA970BL4105009702Switching Q1242SA970BL41050

31、09702Switching Q125-1272SC945P410020945PSoftclipincircuitcontrol Q1282SA733P410000733PLCHpowerAmp Q1292SC945P410020945PSoftclipincircuit Q1302SA733P410000733PLCHpowerAmp Q1312SA733P410000733PLCHpower Amp Q1322SC945P410020945PSoftclipincircuit Q133,1342SA970BL4105009702Switching Q3012SA970BL410500970

32、2Switching Q302,3042SC2240BL4105222402RCHpower Amp Q3032SA970BL4105009702Switching Q3052SD669A410030669ALCHpowerAmp Q3062SB649A410010649A-RCHpowerAmp Q3072SC2240BL4105222402LCHpower Amp Q308,3092SC945P410020945PSoftclipincircuit DIODES D1-41N414841201414801N4148 36 f SymbolNo.Ref.No.PartNo.Descripti

33、on D5RD30EB24120523005Zener,RD30EB2 0101-1041N41484120141480 1N4148 D105-1061SS17641209017601SS176 D107,1081N41484120141480 1N4148 D111,1121SS17641209017601SS176 D113-1161N41484120141480 1N4148 D118RD2.7EB24120520275Zener,RD2.7EB2 D118orRD2.7EB14120510275Zener,RD2.7EB1 D301,302GBU6D41300GBU6DGBU6D D

34、303,304W02M4130150022W02M D305,306SF5D41410405D410SCR.SF5D41 D307RD22EB24120522205Zener,RD22EB2 D308RD27EB24120522705Zener,RD27EB2 D309RD30EB24120523005Zener,RD30EB2 D310,3111N414841201414801N4148 D412-4141N414841201414801N4148 COILS L1,23.7mH7089705098Ring coil L101,1021.8uHPC99014320189131Audiocoi

35、l 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(UL,CSA) F309T500mA/250V5267050060Fuse semkT500mA/250(UK) CAPACITORS C1,25

36、1541002255154100225EL.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 C11,1251541002255154100225EL.CAP lOuF/25V,+-207 C13,1450911525135091152513P

37、L.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 C41,4273071103157307110315Mult.CAP .0luF/50V,+-107 C43,4451541002255154100225EL.CA

38、PlOuF/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 C53,5451541012105154101210EL.CAP100uF/IOV,+-207 C55,5651141835505114183550Mylar.CAP.018

39、uF/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 C65,6673071103157307110315Mult.CAP.0luF/16V,+-107 C6751141045505114104550Mylar.CAP.luF/50V,

40、+-57 37 SymbolNo.Ref.No.Part No.Description C6873069330527306933052Mult.CAP33uF/50V,+-20% C101,10251541002255154100225EL.CAPlOuF/25V,+-20% C103,10473065561157306556115Mult.CAP560uF/50V,+-10% C105,10673069470527306947052Mult.CAP47uF/50V,+-5% C107,10873065102157306510215Mult.CAP.OOluF/50V,+-5% C109,11

41、073066104457306610445Mult.CAP.luF/50V,+-5% C111,11251541022105154102210EL.CAP1000uF/IOV,+-20% C113,11473069220527306922052Mult.CAP22uF/50V,+-5% C115,11673069220527306922052Mult.CAP22uF/50V,+-5% C117,11873065221157306522115Mult.CAP220uF/50V,+-10% C123,12451544702255154470225EL.CAP47uF/25V,+-20% C125-

42、12851141045505114104550Mylar.CAP.luF,+-5% C129-13251541002635154100263EL.CAPlOuF/63V,+-20% C135,13673071103157307110315Mult.CAP.OluF/16V,+-10% C137,13873078222157307822215Mult.CAP.0022uF/16V,+-10% C141,14251541012105154101210EL.CAP100uF/IOV,+-20% C14351541002255154100225EL.CAPlOuF/25V,+-20% C144,145

43、51544702165154470216EL.CAP47uF/16V,+-20% C14651542292505154229250EL.CAP2.2uF/50V,+-20% C14751541002255154100225EL.CAPlOuF/25V,+-20% C149,15051141045115114104511MylarCAP.luF/100V,+-5% C153,15473069220527306922052Mult.CAP22uF/50V,+-5% C301,30251041034415104103441CER.CAP.OluF/500V,+-20% C303,3045154103

44、2505154103250EL.CAP10000uF/50V,+-20% C30551041034415104103441CER.CAP.OluF/500V,+-20% C306,30751541022105154102210EL.CAP680uF/80V,+-20% C308,30951544702105154470210EL.CAP47uF/100V,+-20% C310,31151544702635154470263EL.CAP47uF/63V,+-20% C312,31351541002505154100250EL.CAPlOuF/50V,+-20% C3145104103452510

45、4103452CER.CAP.0luF,+80/-20% C315,31651541022355154102235EL.CAP1000uF/35V,+-20% C317-31951541002255154100225EL.CAPlOuF/25V,+-20% RESISTORS R1,240501222524050122252RES.2.2Kohm,1/6W R3,440501334524050133452RES.330Kohm,1/6W R5,640501563524050156352RES.56K ohm,1/6W R7,840501181624050118162RES.180ohm,1/6

46、W R9,1040501134624050113462RES.130Kohm,1/6W R11,1240501113624050111362RES.11Kohm,1/6W R13,1440501820524050182052RES.82ohm,1/6W R15,1640501223524050122352RES.22Kohm,1/6W R17,1840501102524050110252RES.1Kohm,1/6W R19,2040501104524050110452RES.100Kohm,1/6W R21,2240501102524050110252RES.1Kohm,1/6W R23,24

47、40501104524050110452RES.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 R37,384050

48、1102524050110252RES.1Kohm,1/6W R39-4240501222524050122252RES.2.2Kohm,1/6W R47,4840501104524050110452RES.100Kohm,1/6W R49,5040501224524050122452RES.220Kohm,1/6W R51,5240501471524050147152RES.470ohm,1/6W 38 SymbolNo.Ref.No.PartNo.Description R55,5640504102524050410252RES.1Kohm,l/4W R58-604050110252405

49、0110252RES.1K ohm,1/6W R61,6240501101524050110152RES.100ohm,1/6W R63,6440501104524050110452RES.100Kohm,l/6W R65,6640501222524050122252RES.2.2Kohm,1/6W R67,6840501153524050115352RES.15Kohm,1/6W R69,7040501392624050139262RES.3.9Kohm,1/6W R71,7240501681624050168162RES.680ohm,1/6W R73,7440501102524050110252RES.1Kohm,l/6W R75,7640501181524050118152RES.180ohm,1/6W R77,7840501221524050122152RES.220ohm,1/6W R7940504272524050427252RES. 2.7Kohm,1/4W R8040501222524050122252RES.2.2Kohm,1/6W R81,8240504102524050410252RES.1Kohm,l/4W R8340501332524050133252RES.13Kohm,1/6W R10