NAD-4020A-tun-sm 电路图 维修手册.pdf

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1、SERVICE MANUAL NAD 4O2OA AM,/FM STEREOTUNER il o ooo INADI L-,! L-l or* sr. rffr oozoaoc coo CONTENTS SPECIFICATION INSIDE VIEW OF UNIT J:1r 2 AC lrne voltage aI i uonito outPut at RECORD oUTRT Dial setiing Adtustment I pornt I Sct ionCarrier Freg LT5O3 LT5O2 Output 455KHZ 30/o Mod 4OOH z IF Hot sad

2、e af SG outPut lhrough 2OOff to AM antsnna trimmer LT5O1 Output 60OKHZ 30o/oMod 400H2 600KHz Hot side of SG outPUt through 200tr to ill AM anlenna tel- minal on rear Panel rc2. ra 1400KHZ I so%Mod. I ooon. 1400KHz 2 n 2. FMALIGNN Edr 1 Slector swrtch In FM Position - - 2 AC lrne vollage at rabd volt

3、ag I o.,u,.* | oo,u I ooinr I tor 3-M)nrtor our pur FM SG t I :.:l l* I setlng Car Iunlng LED Ll10l Center Pornl ol NON- 90MHz Lo-1 IFT1 O utgut connecl to FM 3oo ohm anienna tsrminal on the rsat Pannel through FM dummY antsnna 9oMHz 10006Mod 40OHz FM 2 3 i out, 106MHz TC1 TC3, TC5 I roo%Mod. esMHz

4、I ooo, LT1Ol 9aMHz 2r Muting Pus :M lF and FM Mono Drsto n Sw itch ON SG enna rnpul 1 4dB I VB2O1 output tust I ro09, Mod. gaMHz I onn*, 98MHz r to get tull auoro r. repeat step1 2 3 lncrease FM output It lull audio. 3 and connected pansl through FM iG output 4dB mori )utput cannot bego 3.FM MPx ALI

5、GNMilT:1 Sme as FM aLIGNMENT 12 3 2 FM S is external modulatd by stereo sre,eo$ I *,n I t FM SG gctron lsteP VR3O1 l9KHz t 30Hz through 100 () to TP4 MPX Pilot VR3O1 Stereo LED Light 98MHz 2 98MHz 1oYo19KHz Pilot 90% L+ R. L-R OscilloscoPe to R REC out VR302 O utPut lOYo 19KHz Pilot L only 98MHz $oa

6、ration 2 to L REC out VR3O2 tO% lgKHz Pilot gSMHz Step 2 3 tfect o ie .xcessive differnce Frwesrr r rnoln channets, slrghtty 6dlusl VR302 S that r-i g1 le6kag; of both channsls are squal v v w e-, U C t f- AtIGlIMElIT (OLD VER SION) li : irl i ti |: t: lr t:; ,.: rt - - - - (NEW VERSION START FROM S

7、ERIAL NO B42O5OO1) 5 t*-, IIIAT SIRITIIG ASSEMBTY IIIAGBAM (OLD VERSION) v ,- U I t i ii l ll LI (NEW VERSION START FROM SERIAL NO B42O5OO1) 6 l,rqo IIIGRAM f c e OLD TIBING IIIAGBAM V/ v -r-q19-!r.4-?Jov -ry- - T3i5MA 25OV -GHfiSi#lii Y* t, v v v PGB PARIS tOI o PRIMARY SECTION POWER D POVVER SW 1

8、4-5037i( B 3t_1 t3OA*A FOR : C2 PCIVER CORD F.WER Sw 1.i-5037x8 31-1t-r0A*A POWER CORD POWER SW Ul l4-5037x8 3l-1t29ArA l4-5033 0R t 4- 5o3t fuR : U3, E4 POWERCORD POWER SW U3:14-5030 0R 3t-t j29A*A ta-5032 E4:14-5033 0R l4-5031 7 l 4 V o i r.$ I I I t t 5 FOwm RD POtvER 51 14-5025 0R 3t-1t29ArA t 4

9、-503 E FIWER CCRo POWER SW u4:t4-5033 0R 3l-r129A*A r 4-5031 .v- FOR; Ul,U2 Pq4ER CORD l4-5033 0R r4-5C3 r r.- v 1- AtATroN/wrBiNG DTAGBAM 4;l -:9- T t :l .i ? -)- sct gs _, I *+ *+ 1 I =u -h +J A x T * NEW VERSION Ir 10 l v CIRCUII IIIAGRAM ( rfrteaeo GREEN 16V O r TP4 -t LT5O1 29-3018 c5o7 3OP zr-

10、JUro , r- DC VOLTAGES ARE MEASURED DURING NO SIGNAL CONDITION UNIT: VOLT. TOLERANCE: !5/. H A Yo o-lr - - v - X T : TUNED 5T : STEREO 0 46 rc102 HAt137 z 3 11 9 I r 1 IC r03 HAl I 56 i1312roe5 1ru 2K7 G 0 _a o !0 v v AM IllTII UERSII|NI 4 IlE ooo -: MUTING sil tr ffi 3 ffi 3 ffitl -3lll MUTING THRES

11、HOLD ADJUST, I9KHZ ADJUST. SEPERATON ADJUST. rer *%jg INDICATOR w005 vR201 : vR 301 : vR 302: BOTTOM VIEW r6 r*-1 -J 169 HA1t37 CONNEC ORANG T315MA 250V T31 5MA 250V - ooo MONO/STEREO DE-EMFHASIS 25uS-50uS- CONNECTOR ANGE YELLOW BROWN GREEN .E2,E3 WHIT RED - to ,ot rra 11 LJ 3ooS ECB lo o-o I sD330

12、BDl4O EC B e c930 c1815GR ffi 16-oml | 345578 nAt2l I CBE e 8C546 8C556 8C549 v sl DC VALTAGES ANE MEASUREWITH IOMlr DVM DURING NC SIGNAL CONDTTION CIRGUII IIIAGBAM II / STEI I oea n 300n 75a G AM 2.1 11, 1 rev $ r TPa d9 LT5O1 29-,0r8 F L RIE -13. + ,T T:TUNE D STTSTEREO 16,q1613r7ro9 ilGp-Le1 3ilg

13、I1 4 lC 103 HAl156 112t21065 fr. v t4,76358 HAl197 IC:tO5 ?rr916ro151/. UNIT: VOLT. IOLERAICE: t5/. l- - - ltlzltA PARTS IIST ttTEW UERSIOTII DESCRIPTION SYMBOL NO. 1.70 t.70 I.70 1.70 L.70 t.70 r.70 1.70 r.70 r.70 t.70 r.70 r.70 t.70 r.70 L.70 r.70 r.70 r.70 r.70 t.70 1.70 r.70 r.70 1.70 r.70 r.70

14、t.70 t.70 r.70 r.70 r.70 t.70 L.70 r.70 r.70 1.70 L.70 t.70 t.70 r.70 t.70 1.70 r.70 1.70 r.70 r.70 r.70 L.70 Carbon res Ca rbon res Carbon res Ca rbon res Ca rbon res Carbon res Ca rbon res Carbon res Carbon res Carbon res Carbon res Carbon res Ca rbon res Carbon res Carbon res Ca rbon res Ca rbon

15、res Ca rbon res Carbon res Ca rbon res Ca rbon res Carbon res Ca rbon res Ca rbon res Carbon res Carbon res Ca rbon res Carbon res Ca rbon res Ca rbon res Carbon res Ca rbon res Carbon res Ca rbon res Ca rbon res Carbon res Ca rbon res Ca rbon res Ca rbon res Ca rbon res Ca rbon res Carbon res Ca rb

16、on res Carbon res Carbon res Carbon res Carbon res Carbon res Carbon res 18K ohm 390 ohm 330 ohm 390 ohm 10K ohm 15K ohm 33 ohm 2K2 ohm 390 ohm 82 ohm 22K ohm 12K ohm 220 ohm 47K ohm 5K6 ohm 2K2 ohm 2K7 ohm 470 ohm 22O ohm 12OK ohm 1K5 ohm 330 ohm 100 ohm 56 ohm 120K ohm 680K ohm 680 ohm 27OK ohm 22

17、0K ohm 5K6 ohm 820 ohm 1O0K ohm 39K ohm 330 ohm 22K ohm 56K ohm 390K ohm 22OK ohm 100K ohm 47K ohm LOK ohm 47K ohm 27O ohm 180 ohm 15K ohm 22K ohm lK ohm 27O ohm 22O 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%

18、%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% %W t5% %W +5% %w +5% %w +5% %W +5% %w +5% %w +s% %w +5% %w 16-%ct83 16-%c39IJ 16-%C33rJ 16-%c39lJ 16-%cro3J 16-%Cr53J t6-%c33OJ 16-%c222J t6-%c3

19、9LJ 16-%c82OJ t6-%c223J 16-%CI23J t6-%c22lJ t6-%c473,1 L6-%C562J 16-%c222J 16-%c272J 16-%c47rJ L6-)/,p22lJ 16-%cr24J t6-%cr52J I6-y4c33rJ 16-%CLIJ 16-%C56OJ 16-%Cl24J t6-%c684J 16-%c68rJ 16-%c274J t6-%c224J 76-%C562J 16-%c82IJ 16-%cro4J 16-%c393-t 16-%c33rJ 16-%c223J t6-%c563J 16-%C394J 16-%C224J 16

20、-%CLO4J t6-%c473J 16-%cro3J 16-%c473J 16-%c27tJ t6-%cr8IJ t6-%cl53J 16-%c223J t6-%cro2J 16-%C27rJ R101 * R102 R103 R104 R105 R106 R107 R108 R109 Ri10 R111,R112 R113 R114 R115 R116 R 117 R118 R119 R120 R121 Rr22* R123* RI24* R125* R20L,R202 R203,R204 R205 R206 R207 R208 R209 * R210 R 211 R2I2 R213 *

21、R2t4* R2I6 R2I7 R218,R219 R220 * R22I * R222 * R223 * R224 * R301 R 302 R303 R304 R305 l v ! i I r1 H q il H ; rl 4 ; ! I / / U (e ,( L JL SYMBOL NO. PART NO.DESCRIPTION REF R306 R307,R308 R309 * R310,R311 R312,R313 R3i4,R315 R316,R317 R318,R 319 R320,R321 R401 R402 R403 R404 R405 R406 R407,R408,R 4

22、09 R410 R411 R4t2 R413 R501 R502 R 503 R504 R506 R507,R508 R509 R510 R511 R512 R513 R514 R515 R516 R517 R518 R519 R520 R521 R522 R523 R601 c101-c103 c104 c105-c110 16-%Ct02J 16-%c392J 16 %Cr02J 16-%c334J 16-%c332J 16 %C39rJ 16-%cr02J 16-%c392J 16-%crozJ 16-%c68rJ 16 %Cr52J 16-%cr20J t6-%c22OJ 16-%c6

23、8rJ t6-%cr52J 16-%crozJ L6-%CI23J t6-%c22LJ L6-%Cr24J 16-%Cr23J 16-%cr5IJ 16-%C33rJ 16-%cL52J t6-%c470J 16-%cr22J 16-%CL03J 16-%c272J 16-%c273J 16-%cr5rJ 16-%c33rJ 16-%cr54J 16-%c273J t6-%c683J 16-%c684J 16-%crolJ 16-%C33LJ 16-%cro4J t6-%c722J 16-%C56tJ L6_L/4C562J 16-%c33tJ 16-%C22LJ 17-5D473M 17-5

24、D103M 17- D473M Ca rbon res Carbon res Ca rbon res Carbon res Carbon res Ca rbon res Ca rbon res Ca rbon res Ca rbon res Ca rbon res Ca rbon res Ca rbon res Ca rbon res Ca rbon res Carbon res Carbon res Ca rbon res Carbon res Carbon res Carbon res Ca rbon res Carbon res Carbon res Carbon res Carbon

25、res Carbon res Carbon res Carbon res Carbon res Carbon res Carbon res Carbon res Carbon res Carbon res Carbon res Carbon res Carbon res C arbon res C a rbon res Carbon res Carbon res Carbon res Ceramic Capa Ceramic Capa Ceramic Capa lK ohm +5 % %w 3K9 ohm +5 % %W lK ohm +5 % %w 330K ohm +5 % r,4W 3K

26、3 ohm +5 % %W 390 ohm +5 % %W 1K ohm +5 % %W 3K9 ohm +5 % %W lK ohm +5 % %W 680 ohm +5 % %W 1K5 ohm +5 % %W 12 ohm +5 % %W 22 ohm +5 % %W 680 ohm +5 % %W 1K5 ohm +5 % % lK ohm +5 % %W 12K ohm +5 % %W 22O ohm +5 % %W 120Kohm +5 % %W 12K ohm +5 % %W 150 ohm +5 % %W 330 ohm +5 % %W 1K5 ohm +5 % %W 47 o

27、hm +5 % %W 1K2 ohm +5 % %W 10K ohm +5 % %W 2K7 ohm +5 % %W 27K ohm +5 % %W 150 ohm +5 % %W 330 ohm +5 % %W 150Kohm +5 % %W 27K ohm +5 % %W 68K ohm +5 % %W 680Kohm +5 % %W 100 ohm +5 % %W 330 ohm +5 % %W l0OKohm +5 % %W 1K2 ohm +5 % %W 560 ohm +5 % %W 5K6 ohm +5 % %W 330 ohm +5 % %W 22O ohm +5 % %w 0

28、.047 uF +2O% 50V 0.01prF +2O% 50V 0.047 ttF +2O% 50V 7 0 r.70 r.70 r.70 70 r.70 r.70 L.70 t.70 r.70 1.70 2.40 2.40 r.70 -70 |.70 r.70 L.70 r.70 r.70 t.70 t.70 t.70 r.70 r.70 r.70 1.70 L70 r.70 r.70 L70 t.70 L.70 r.70 L.70 1.70 r.70 L.70 r.70 t.70 t.70 t.70 5.00 3.40 5.00 SYMBOL NO. PART NO. DESCRIPT

29、ION REF c111 c112,C113 c114,C115 cl16 c117 c118* c1r9* c202 c203 c204 c301 c3o2 c303 c304 c305 c306 c307 c308 c309,c310 c311,C312 c313,C314 c315,C316 c317,C318 c319,C320 c321 c322,C323 c324,C325 c326 c401 c402 c403 c404 c405,c406 c407,c408 c501 c502 c503 c504 c505 c506 c507 c509,c510 c511 c5t2 c513

30、c514 +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% +7

31、5-tO% t7 -7.6E227Y 17-5E105Y 17-5D473M 17-5E105Y 17-5D103M r7-5D 223M t7-5D 473M 17-r.6E476Y T7 -L.6EIO7Y 17-5E105Y T7-D2OTK 17-258475Y I7-5U471J t7-5F473J 17-t.60224M 17-1.60474M 17-r.60224M 17-r.6E227Y T7-5U82LJ t7-5F562J T7-5FT23J 17- 5Fl83J 17-5D431J 17-5E105Y 17-1.0S107Y t7-2.5E475Y 17- 1.6E107

32、Y L7-2.EIO7Y 17-3.5E108Y t7-3.5E477Y t7-25E477Y 17-2.5E337Y 17-5D220M T7-25ETO6Y 17-r.6E227Y 17-2.5E475Y 17-5D103M 17-5D102M 17-1.6E107Y t7-r.6E227Y 17-5U361J 17-5D103M 17-5D473M t7-2.5E475Y 17-5E105Y 17-2.5E475Y Elec. Capa. 22OPF Eec: Capa. IPF Ceramic Capa. O.O47 PF Elec. Capa. IttF Ceramic CaPa.

33、0.01PF Ceramic Capa, O.O22ttF Ceramic Capa, 0.047 pF Elec. Capa. 47ltF Elec. Capa. 100/rF Elec. Ca pa. I PF Ceramic Capa. 200PF Elec. Capa. 4.7|-LF Polystyroiene Cap a.47 OPF Mylar Capa. O.O47 ttF Tantalum Capa. O.22ttF Tantalum Capa. O.47 ttF Tantalum Capa. O.22PF Elec. Capa. 220 PF Polystyroiene C

34、apa. 820PF Myla r Capa. 0.0056PF Mylar Capa. O.OlzpF Mylar Capa. 0.018PF Ceramic Capa. 430PF Elec. Capa. I ttF Non-polarCapa. 100t-tF Elec. Capa. 4.7 PF Elec. Capa. 100PF Elec. Capa. 100PF Elec. Capa. 1000PF Elec. Ca pa. 47O PF Elec. Capa. 470 ttF Elec. Capa. 330PF Ceramic Capa. 22PF Elec. Capa. 10P

35、F Elec. Capa. 220 PF Elec. Capa. 4.7 ttF Ceramic Capa. 0.01PF Ceramic Capa. 1000PF Elec. Capa. 100P F Elec. Capa. 22OPF Polystyroiene Capa. 360PF Ceramic Capa. 0.01PF Ceramic Capa. O.O47 PF Elec. Capa. 4.7 PF Elec. Capa I PF Elec. Capa 4.7 PF 16V 50v 50v 50v 50v 50v 50v 16V 16V 50v 50v 25V 50v 50v 1

36、6V 16V 16V 16V 50v 50v 50v 50v 50v 50v i0v 25V 16V 25V 35V 35V 25V 25V 50v 25V 16V 25V 50v 50v 16V i6v 50v 50v 50v 25V 50v 25V 33.50 8.00 5.00 8.00 3.40 5.00 5.00 12.00 14.00 8.00 4.00 8.00 9.60 8.90 16.40 16.40 r6.40 33.50 9.60 6.50 8.90 8.90 5.20 8.00 14.00 8.00 14.00 16.00 93.00 47.90 46.80 38.40

37、 3.50 12.00 33.50 8.00 3.40 4.00 14.00 33.50 9.40 3.40 5.00 8.00 8.00 8.00 v l/ v d U 4 v / I v , v I SYMBOL NO.PART NO, DESCRlPTIONREF c515,C516 C5T7 c518, C519 c520 c522 c523 tc101 rc102 rc103 rc104 rc105 Q101,Q102 Q201*Q208 * Q301,Q302 Q4o1 Q402 Q403 Q404 Q501 cF101-CF103 1101 Lto2 1103 1104 LTlO

38、1 LT5O1 LT5O2 LT5O3 LTOOl D20L*D206* D401 D402 Front End Push SW Push SW Slide SW L. P. F. VR2O1 VR3O1 VR3O2 17-5D103M L7 -5Fr52J 17-5F183J 17-5D473M 17-5DLO2M 17-5D150M 30-3035 30-3017 30-3015 30-3032 30 3036 30-2019 30-2156 30-2084-3 30-2078 30-2090-2 30-2096 30-2082 30-2084-3 29 -3051 29-rO37 29-

39、1034 29-1038 29-rO39 29-3008 29-3018 29-3032 29-3029 18-1016-1 30-1019 30-1044 30-1035 FEA321 X A 3l-LO74F 31-1140F 31-1088 29-3049 29-4079F 29-4077F 29-4023-tF +20% 50v +5% 50V +5% 5oV +20% 50v +20% 50v +20% 50v Ceramic Capa. 0.01pF Mylar Capa. 0.0015pF Mylar Capa 0.0l8pF Ceramic Capa. 0.047 pF Cer

40、amic Capa 1000PF Ceramic Capa. 15PF HA1211 HA1137 HA1156 cA1458 HA1197 2SC930 Tra nsistor 2SC1815GR Transistor BC549C Transistor 2SD330 Tra nsistor BC546B Transistor BC556A Transistor B D140 Transistor B C549C Tra nsistor Ceramic Filter SFE i0.7MP lmH 22pH 39pH 18,UH I nductor I nductor I nd uctor I

41、 nductor FM DET 10.7MHz AM Local coil AM lF coil AM lF coil Balun Diode BAW62 Zener Diode 15V Bridge Diode W005 FEA321 X A Push SW2U2 Key Push SW 2U2 Key Slide SW L.P.F.19,38KHz Filter Semifix Res 500K Semifix Res 10K Semifix Res 20K 3.40 6.50 8.90 5.00 4.00 3.50 1 I 5.00 240.O0 180.00 108.00 236.00

42、 23.00 14.00 22.80 76.00 24.OO 24.70 58.90 22.80 61.50 16.00 15.00 15.00 11 .00 96.00 25.O0 134.00 25.00 10.20 11.00 20.oo 72.00 1870 95.00 98,00 57.00 180.00 18.00 18.00 18.00 *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.70 Q201*Q206 30-2r562SC1815GR Transistor 14.00 D20t-D20530-1019 Diode BAW62 11.00 R309L6-%C68LJCarbon res 680 ohm +5% %W 1.70 Ri01L6-%C33OJCarbon res 33 ohm +5% %Wt.70