NAD-4020A-tun-sm 维修电路原理图.pdf

SERVICE MANUALNAD 4O2OA AM,/FM STEREOTUNERilo oooINADIL-,! L-l or* sr. rffr oozoaoc cooCONTENTSSPECIFICATIONINSIDE VIEW OF UNIT & BLOCK DIAGRAMALIGNMENTDIAL STRING ASSEMBLY DIAGRAMASSEMBLY DIAGRAMPCB PARTS LOCATTON(OLD VERSTON)PCB PARTS LOCATION(NEW VERSION)ctRcutT DTAGRAM(OLD VERSTON)crRcutT DTAGRAM(NEW VERSTON)PACKING DIAGRAMPARTS LISTPAGE 2PAGE 3PAGE 4,5PAGE 6PAGE 7PAGE 8PAGE 9PAGE 10PAGE 11PAGE ,I3PAGE 13 -17aRadioFans.CN 收音机爱 好者资料库sPtctFtGtil0il4020AFM TUNER SECTIONlnput Sensiiivity lHF, 3OdB quietinglHF, 50dB S,/N Mono,/StereoSignal to ,Noise Ratio (A weighted, at 65dBf) Mono/StereoFrequency Response, 3O-15KHzDe-emphasis Accuracy 75ti /secChannel Separation lKHz30-1SKHzSelectivity, Alternate Channel (4OOKHz)Capture Ratio at 45 dBf and 65dBfAM Suppression at 45 dBf and 65dBflmage RejectionlF RejectionSCA RejectionPilot Signal SuppressionTHD at lOO% Modulation lKHz Mono,/StereoIOOHz Mono,/Stereo6KHz Mono,/Stereo vTHD Stereo lKHz 5O%/15O%AM TUNER SECTIONUsable SensitivitySelectivitylmage RejectionlF RejectionPHYSICAL SPECIFICATIONPower ConsumptionWeightDimension Height x Width x DePth(D1.8 pV3.5 pV/45 uV75dB/7OdB+o.5dB+o.3dB42dB32dB62dB1.5d860dB50dB75dB70dB55dBo.2%/o.3%o.z%/o.3%o3%/o.4%03%/o.4%300pv30dB45dB3 5dB8W4.2K996x420 x240GIqD2-lRadioFans.CN 收音机爱 好者资料库INSIDE VIEW OF UNITri/-1. RFAmp.2. lF Amp.3. Regulator4. MPX & Buffer5. Low Pass Filter6. LED Priver7. AM System8. TransformervIvDualBLOCK DIAGRAML-_L/1 AM ALTGNMENT 1 sebcrd swrrci-r-41.i:;J:1r2 AC lrne voltage aIi uonito outPut at RECORD oUTRTDial setiingAdtustment Ipornt ISct ionCarrier FregLT5O3LT5O2Output455KHZ30/o Mod4OOH zIFHot sade af SG outPut lhrough2OOff to AM antsnna trimmerLT5O1Output60OKHZ30o/oMod400H2600KHzHot side of SG outPUt through200tr to ill AM anlenna tel-minal on rear Panelrc2. ra1400KHZI so%Mod.I ooon.1400KHz2n2. FMALIGNNEdr 1 Slector swrtch In FM Position- - 2 AC lrne vollage at rabd voltagI o.,u,.* | oo,uI ooinr I tor3-M)nrtor our purFM SGt I :.:ll*I setlngCarIunlng LEDLl10lCenterPornl ol NON-90MHzLo-1IFT1O utgutconnecl to FM 3oo ohm aniennatsrminal on the rsat Pannelthrough FM dummY antsnna9oMHz10006Mod40OHzFM23i out,106MHzTC1 TC3, TC5I roo%Mod.esMHz I ooo,LT1Ol9aMHz2rMuting Pus:M lF and FM Mono Drston Sw itch ONSGenna rnpul 1 4dBIVB2O1output tustI ro09, Mod.gaMHz I onn*,98MHzr to get tull auoror. repeat step1 2 3lncrease FM outputIt lull audio.3 and connectedpansl through FMiG output 4dB mori)utput cannot bego3.FM MPx ALIGNMilT:1 Sme as FM aLIGNMENT 12 32 FM S is external modulatd by stereosre,eo$ I *,n ItFM SGgctron lstePVR3O1l9KHz t30Hzthrough 100() to TP4MPX PilotVR3O1Stereo LEDLight98MHz298MHz1oYo19KHz Pilot 90%L+ R. L-ROscilloscoPeto R REC outVR302O utPutlOYo 19KHz PilotL only98MHz$oaration2to L REC outVR3O2tO% lgKHz PilotgSMHzStep 23tfect oie .xcessive differnce Frwesrr rrnoln channets, slrghtty 6dlusl VR302 S thatr-i g1 le6kag; of both channsls are squalvvwe-,UCtf-AtIGlIMElIT(OLD VER SION)li:irli ti|:t:lrt:;,.: rt-(NEW VERSION START FROM SERIAL NO B42O5OO1)5t*-,IIIAT SIRITIIG ASSEMBTY IIIAGBAM(OLD VERSION)v,-UItiiilllLI(NEW VERSION START FROM SERIAL NO B42O5OO1)6l,rqoIIIGRAM&vItem Forts No. DescriPtion dtY1 1l-8135 Ponel Front Brown 1l1-8143 Ponet Front Silver 12 12-3037 Tuning Knob 13 23-3004 Dicost forTuningKnob 14 12-3039 PushKnob 55 12-4012 Pointer 16 28-2015 MYtor I7 14-3001 Tuning Threod 15MI 14-10031 LED Hotder 1I 1 l-8085 Perspex Cover Btock 11l-8142 PersPexCover Sitver 110 11-8137 Diot Scote Ptote 11 1 1 l-81 14 Diot Ptote 112 30-1026 LED 5I 3 1 l-6060 Chossis Front Il4 l1-2086 Brocket forTuningslrft 115 11-2113 Brocket Left 116 1l-21l2 Brocket Right 117 11-6040 Chossis Left 118 11-6083 Chossis RxJht 119 11-6044 Chossis Center 120 13-5004 PutteY 121 ll-7032 PulteY Shof t t12? 11-7011 Tuning Shoft 12 3 1 3-501 6 FtY Wheel 121 13-5029 TuningWheel 125 12-5007 SPring l26 I 5-10084 EYetet 127 11-2213 Brocket lor futteY 128 1F3026 Lug 12s 1l-6090 Chossis Bottom 130 28-1029 Rrrbber Foot 431 28-1016 Rubber Bush 132 31-20081 LomP 133 1l-8136 Ponet Bock 134 29-2038 Tronsformer 135 12-1032 Connector 136 29-5008 Ant. Bor 137 14-5003 Cord Bush 4N4 138 14-5037 PowerCord 139 11-3033 Lug torConnector 140 50-1017 Cobinet I41 14-5005 Cord Bush 5N4 1gtao-aIi6tlIwPOWER CORD POWER SWul t4-503?xB 31-ll2gAiA14-5033 0Rl4-5031POWER CORO POWER 5W1t -5037X8 3l-l 130AXAFOR: E1POWER RO14-5033 0R14-503 1POWER 5W3l-t 1294*4POWER CORO FOWER Swu3 14-5030 0R 31-1129A*A11-5032E4 l/r 5033 oR14 503,1FOWER CORD POWER 51Vl4-5o25 oR 3l-tl29A*Al4-503 IPOWER CORD PO,I/ER SWu4:14-5033 0R 31-rizgArAr4-5031PRIMARY SECTIONFoR:U1, U2POWER CORD POWER SW14-503? 3l-1130A*AFOR: C2FOR: U3, E6GNOIU;fceOLDTIBING IIIAGBAMV/v-r-q19-!r.4-?Jov-ry- T3i5MA 25OV-GHfiSi#liiY*t,vvvPGB PARIS tOIoPRIMARYSECTIONPOWER D POVVER SW1 4-5037i( B 3t_1 t3OA*AFOR : C2PCIVER CORD F.WER Sw1.i-5037x8 31-1t-r0A*APOWER CORD POWER SWUl l4-5037x8 3l-1t29ArAl4-5033 0Rt 4- 5o3tfuR : U3, E4POWERCORD POWER SWU3:14-5030 0R 3t-t j29A*Ata-5032E4:14-5033 0Rl4-50317l4Voir.$IIItt5FOwm RD POtvER 5114-5025 0R 3t-1t29ArAt 4-503 EFIWER CCRo POWER SWu4:t4-5033 0R 3l-r129A*Ar 4-5031.v-FOR; Ul,U2Pq4ER CORDl4-5033 0Rr4-5C3 rr.-v1-AtATroN/wrBiNG DTAGBAM4;l-:9- Tt:l.i?-)-sctgs_, I*+*+1I=u-h+JAxT*NEW VERSIONIr10lvCIRCUII IIIAGRAM (rfrteaeoGREEN16V Or TP4-tLT5O129-3018c5o7 3OP zr-JUro, r-DC VOLTAGES ARE MEASUREDDURING NO SIGNAL CONDITIONUNIT: VOLT. TOLERANCE: !5/.HAYoo-lr-v-X T : TUNED5T : STEREO046rc102HAt137z 3 11 9 I r 1IC r03 HAl I 56i1312roe51ru2K7G0_ao!0vvAM IllTII UERSII|NI4IlEooo-: MUTING siltrffi3ffi3ffitl-3lllMUTING THRESHOLD ADJUST,I9KHZ ADJUST.SEPERATON ADJUST.rer*%jgINDICATORw005vR201 :vR 301 :vR 302:BOTTOM VIEWr6r*-1-J169HA1t37CONNECORANGT315MA 250VT31 5MA 250V-oooMONO/STEREODE-EMFHASIS25uS-50uS-CONNECTORANGEYELLOWBROWNGREEN.E2,E3WHITRED-to ,ot rra 11LJ3ooSECBlo o-o IsD330BDl4OEC Bec930c1815GRffi16-oml| 345578nAt2l ICBEe8C5468C5568C549vslDC VALTAGES ANE MEASUREWITH IOMlr DVMDURING NC SIGNAL CONDTTIONCIRGUII IIIAGBAM II/ STEII oean300n75aGAM2.1 11,1rev $r TPad9LT5O129-,0r8FLRIE-13.+,T T:TUNE DSTTSTEREO16,q1613r7ro9ilGp-Le13ilgI14lC 103 HAl156112t21065fr.vt4,76358HAl197 IC:tO5?rr916ro151/.UNIT: VOLT. IOLERAICE: t5/.l- - -ltlzltA PARTS IIST ttTEW UERSIOTIIDESCRIPTIONSYMBOL NO.1.70t.70I.701.70L.70t.70r.701.70r.70r.70t.70r.70r.70t.70r.70L.70r.70r.70r.70r.70t.701.70r.70r.701.70r.70r.70t.70t.70r.70r.70r.70t.70L.70r.70r.701.70L.70t.70t.70r.70t.701.70r.701.70r.70r.70r.70L.70Carbon resCa rbon resCarbon resCa rbon resCa rbon resCarbon resCa rbon resCarbon resCarbon resCarbon resCarbon resCarbon resCa rbon resCarbon resCarbon resCa rbon resCa rbon resCa rbon resCarbon resCa rbon resCa rbon resCarbon resCa rbon resCa rbon resCarbon resCarbon resCa rbon resCarbon resCa rbon resCa rbon resCarbon resCa rbon resCarbon resCa rbon resCa rbon resCarbon resCa rbon resCa rbon resCa rbon resCa rbon resCa rbon resCarbon resCa rbon resCarbon resCarbon resCarbon resCarbon resCarbon resCarbon res18K ohm390 ohm330 ohm390 ohm10K ohm15K ohm33 ohm2K2 ohm390 ohm82 ohm22K ohm12K ohm220 ohm47K ohm5K6 ohm2K2 ohm2K7 ohm470 ohm22O ohm12OK ohm1K5 ohm330 ohm100 ohm56 ohm120K ohm680K ohm680 ohm27OK ohm220K ohm5K6 ohm820 ohm1O0K ohm39K ohm330 ohm22K ohm56K ohm390K ohm22OK ohm100K ohm47K ohmLOK ohm47K ohm27O ohm180 ohm15K ohm22K ohmlK ohm27O ohm22O ohm+5% %w+5% %W+5% %W+5% %W+5% %w+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% r/+N+5% %W+5% %W+5% %W+5% %w+5% %W+5% %W+5% %W+5% %W!5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %W+5% %Wt5% %W+5% %w+5% %w+5% %W+5% %w+5% %w+s% %w+5% %w16-%ct8316-%c39IJ16-%C33rJ16-%c39lJ16-%cro3J16-%Cr53Jt6-%c33OJ16-%c222Jt6-%c39LJ16-%c82OJt6-%c223J16-%CI23Jt6-%c22lJt6-%c473,1L6-%C562J16-%c222J16-%c272J16-%c47rJL6-)/,p22lJ16-%cr24Jt6-%cr52JI6-y4c33rJ16-%CLIJ16-%C56OJ16-%Cl24Jt6-%c684J16-%c68rJ16-%c274Jt6-%c224J76-%C562J16-%c82IJ16-%cro4J16-%c393-t16-%c33rJ16-%c223Jt6-%c563J16-%C394J16-%C224J16-%CLO4Jt6-%c473J16-%cro3J16-%c473J16-%c27tJt6-%cr8IJt6-%cl53J16-%c223Jt6-%cro2J16-%C27rJR101 *R102R103R104R105R106R107R108R109Ri10R111,R112R113R114R115R116R 117R118R119R120R121Rr22*R123*RI24*R125*R20L,R202R203,R204R205R206R207R208R209 *R210R 211R2I2R213 *R2t4*R2I6R2I7R218,R219R220 *R22I *R222 *R223 *R224 *R301R 302R303R304R305lv!iIr1HqilH;rl4;!I/U(e,(LJLSYMBOL NO.PART NO.DESCRIPTIONREFR306R307,R308R309 *R310,R311R312,R313R3i4,R315R316,R317R318,R 319R320,R321R401R402R403R404R405R406R407,R408,R 409R410R411R4t2R413R501R502R 503R504R506R507,R508R509R510R511R512R513R514R515R516R517R518R519R520R521R522R523R601c101-c103c104c105-c11016-%Ct02J16-%c392J16 %Cr02J16-%c334J16-%c332J16 %C39rJ16-%cr02J16-%c392J16-%crozJ16-%c68rJ16 %Cr52J16-%cr20Jt6-%c22OJ16-%c68rJt6-%cr52J16-%crozJL6-%CI23Jt6-%c22LJL6-%Cr24J16-%Cr23J16-%cr5IJ16-%C33rJ16-%cL52Jt6-%c470J16-%cr22J16-%CL03J16-%c272J16-%c273J16-%cr5rJ16-%c33rJ16-%cr54J16-%c273Jt6-%c683J16-%c684J16-%crolJ16-%C33LJ16-%cro4Jt6-%c722J16-%C56tJL6_L/4C562J16-%c33tJ16-%C22LJ17-5D473M17-5D103M17- D473MCa rbon resCarbon resCa rbon resCarbon resCarbon resCa rbon resCa rbon resCa rbon resCa rbon resCa rbon resCa rbon resCa rbon resCa rbon resCa rbon resCarbon resCarbon resCa rbon resCarbon resCarbon resCarbon resCa rbon resCarbon resCarbon resCarbon resCarbon resCarbon resCarbon resCarbon resCarbon resCarbon resCarbon resCarbon resCarbon resCarbon resCarbon resCarbon resCarbon resC arbon resC a rbon resCarbon resCarbon resCarbon resCeramic CapaCeramic CapaCeramic CapalK ohm +5 % %w3K9 ohm +5 % %WlK ohm +5 % %w330K ohm +5 % r,4W3K3 ohm +5 % %W390 ohm +5 % %W1K ohm +5 % %W3K9 ohm +5 % %WlK ohm +5 % %W680 ohm +5 % %W1K5 ohm +5 % %W12 ohm +5 % %W22 ohm +5 % %W680 ohm +5 % %W1K5 ohm +5 % %lK ohm +5 % %W12K ohm +5 % %W22O ohm +5 % %W120Kohm +5 % %W12K ohm +5 % %W150 ohm +5 % %W330 ohm +5 % %W1K5 ohm +5 % %W47 ohm +5 % %W1K2 ohm +5 % %W10K ohm +5 % %W2K7 ohm +5 % %W27K ohm +5 % %W150 ohm +5 % %W330 ohm +5 % %W150Kohm +5 % %W27K ohm +5 % %W68K ohm +5 % %W680Kohm +5 % %W100 ohm +5 % %W330 ohm +5 % %Wl0OKohm +5 % %W1K2 ohm +5 % %W560 ohm +5 % %W5K6 ohm +5 % %W330 ohm +5 % %W22O ohm +5 % %w0.047 uF +2O% 50V0.01prF +2O% 50V0.047 ttF +2O% 50V7 0r.70r.70r.70 70r.70r.70L.70t.70r.701.702.402.40r.70-70|.70r.70L.70r.70r.70t.70t.70t.70r.70r.70r.701.70L70r.70r.70L70t.70L.70r.70L.701.70r.70L.70r.70t.70t.70t.705.003.405.00SYMBOL NO.PART NO.DESCRIPTIONREFc111c112,C113c114,C115cl16c117c118*c1r9*c202c203c204c301c3o2c303c304c305c306c307c308c309,c310c311,C312c313,C314c315,C316c317,C318c319,C320c321c322,C323c324,C325c326c401c402c403c404c405,c406c407,c408c501c502c503c504c505c506c507c509,c510c511c5t2c513c514+50%_ro%+75-r0%+20%+75-rO%!1a%+20%+29%+50-rc%+50-IO%+75-rO%1-Lo%+75-rO%+5%+5%+20%+20%i20%+20%+50-rc%+5%+5%!5%+5%+75 -r0%+50-n%+75-t0%+50-to%+sio-rO%+50-rc%+5Q-rO%+50-t0%+5n-rc%+20%+50-rc%+50-r0%+75-rO%+2Q%+20%+50-LO%+50-ro%+5%+28%+20%+75-r0%+75-t0%+75-tO%t7 -7.6E227Y17-5E105Y17-5D473M17-5E105Y17-5D103Mr7-5D 223Mt7-5D 473M17-r.6E476YT7 -L.6EIO7Y17-5E105YT7-D2OTK17-258475YI7-5U471Jt7-5F473J17-t.60224M17-1.60474M17-r.60224M17-r.6E227YT7-5U82LJt7-5F562JT7-5FT23J17- 5Fl83J17-5D431J17-5E105Y17-1.0S107Yt7-2.5E475Y17- 1.6E107YL7-2.EIO7Y17-3.5E108Yt7-3.5E477Yt7-25E477Y17-2.5E337Y17-5D220MT7-25ETO6Y17-r.6E227Y17-2.5E475Y17-5D103M17-5D102M17-1.6E107Yt7-r.6E227Y17-5U361J17-5D103M17-5D473Mt7-2.5E475Y17-5E105Y17-2.5E475YElec. Capa. 22OPFEec: Capa. IPFCeramic Capa. O.O47 PFElec. Capa. IttFCeramic CaPa. 0.01PFCeramic Capa, O.O22ttFCeramic Capa, 0.047 pFElec. Capa. 47ltFElec. Capa. 100/rFElec. Ca pa. I PFCeramic Capa. 200PFElec. Capa. 4.7|-LFPolystyroiene Cap a.47 OPFMylar Capa. O.O47 ttFTantalum Capa. O.22ttFTantalum Capa. O.47 ttFTantalum Capa. O.22PFElec. Capa. 220 PFPolystyroiene Capa. 820PFMyla r Capa. 0.0056PFMylar Capa. O.OlzpFMylar Capa. 0.018PFCeramic Capa. 430PFElec. Capa. I ttFNon-polarCapa. 100t-tFElec. Capa. 4.7 PFElec. Capa. 100PFElec. Capa. 100PFElec. Capa. 1000PFElec. Ca pa. 47O PFElec. Capa. 470 ttFElec. Capa. 330PFCeramic Capa. 22PFElec. Capa. 10PFElec. Capa. 220 PFElec. Capa. 4.7 ttFCeramic Capa. 0.01PFCeramic Capa. 1000PFElec. Capa. 100P FElec. Capa. 22OPFPolystyroiene Capa. 360PFCeramic Capa. 0.01PFCeramic Capa. O.O47 PFElec. Capa. 4.7 PFElec. Capa I PFElec. Capa 4.7 PF16V50v50v50v50v50v50v16V16V50v50v25V50v50v16V16V16V16V50v50v50v50v50v50vi0v25V16V25V35V35V25V25V50v25V16V25V50v50v16Vi6v50v50v50v25V50v25V33.508.005.008.003.405.005.0012.0014.008.004.008.009.608.9016.4016.40r6.4033.509.606.508.908.905.208.0014.008.0014.0016.0093.0047.9046.8038.403.5012.0033.508.003.404.0014.0033.509.403.405.008.008.008.00vl/vdU4v/Iv,vISYMBOL NO.PART NO,DESCRlPTIONREFc515,C516C5T7c518, C519c520c522c523tc101rc102rc103rc104rc105Q101,Q102Q201*Q208 *Q301,Q302Q4o1Q402Q403Q404Q501cF101-CF1031101Lto211031104LTlO1LT5O1LT5O2LT5O3LTOOlD20L*D206*D401D402Front EndPush SWPush SWSlide SWL. P. F.VR2O1VR3O1VR3O217-5D103ML7 -5Fr52J17-5F183J17-5D473M17-5DLO2M17-5D150M30-303530-301730-301530-303230 303630-201930-215630-2084-330-207830-2090-230-209630-208230-2084-329 -305129-rO3729-103429-103829-rO3929-300829-301829-303229-302918-1016-130-101930-104430-1035FEA321 X A3l-LO74F31-1140F31-108829-304929-4079F29-4077F29-4023-tF+20% 50v+5% 50V+5% 5oV+20% 50v+20% 50v+20% 50vCeramic Capa. 0.01pFMylar Capa. 0.0015pFMylar Capa 0.0l8pFCeramic Capa. 0.047 pFCeramic Capa 1000PFCeramic Capa. 15PFHA1211HA1137HA1156cA1458HA11972SC930 Tra nsistor2SC1815GR TransistorBC549C Transistor2SD330 Tra nsistorBC546B TransistorBC556A TransistorB D140 TransistorB C549C Tra nsistorCeramic Filter SFE i0.7MPlmH22pH39pH18,UHI nductorI nductorI nd uctorI nductorFM DET 10.7MHzAM Local coilAM lF coilAM lF coilBalunDiode BAW62Zener Diode 15VBridge Diode W005FEA321 X APush SW2U2 KeyPush SW 2U2 KeySlide SWL.P.F.19,38KHz FilterSemifix Res 500KSemifix Res 10KSemifix Res 20K3.406.508.905.004.003.501 I 5.00240.O0180.00108.00236.0023.0014.0022.8076.0024.OO24.7058.9022.8061.5016.0015.0015.0011 .0096.0025.O0134.0025.0010.2011.0020.oo72.00187095.0098,0057.00180.0018.0018.0018.00*means that the parts list is difference between OLD VERSI0N and NEW VERSION,FOR OLD VERSION* parts must be canceled, and change these parts as follows:R209L6-%Ct22JCarbon res. 1K2 ohm +5% rlWr.70Q201*Q20630-2r562SC1815GR Transistor14.00D20t-D20530-1019Diode BAW6211.00R309L6-%C68LJCarbon res 680 ohm +5% %W1.70Ri01L6-%C33OJCarbon res 33 ohm +5% %Wt.70