Onkyo-TX7430-rec-sm 电路图 维修手册.pdf

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1、TX7430 SER IAL NO. 32 58 ONKYO, SERVICE MANUAL aUARTZ SYNTHESIZED TUNER AMPLIFIER MODEL TX- 7430 - SAFETY- RELATED COMPONENT WARNING! COMPONENTS IDENTIFI ED BY MARK L. ON THE SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK. REPLACE THESE COMPONENTS WITH ONKYO

2、 PARTS WHOSE PARTS NUMBERS APPEAR AS SHOWN IN THIS MANUAL. MAKE LEAKAGE-CURR ENT OR RESISTANCE MEA SUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO TH E CUSTOMER. TABLE OF CONTENTS Specification s 2 Service procedures 3 Expl

3、oded view _. . . . . . . . . . . . . . 4 Parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 Circuit descriptions 6 Block diagram - Amp. section . . . . . . . . . . . . . . . 12 - Tuner section -., . . . . . . . . . . . 13 Block diagram of IC 14 Packing view . . . . . . . .

4、. . . . . . . . . . . . . . . . . 17 Adjustment procedures _. 18 Pc bcard view/parts list Power amp. . . . . . . . . . . . . . . . . . . . . . . . . . . 21 FM /AM tun er 25 Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29 Preamp. . _. . . . . . . . . 30 Remote cuntrol . . . . .

5、 . . . . . . . . . . . . . . . . . . . 31 Switch 3 1 Speake r 32 Volume 32 Schematic diagram Amp. section 23 Tuner section 27 Disassembling prccedures 33 ONKYO AUDIO COMPONfNTS - 1 RadioFans.CN 收音机爱 好者资料库 SPECIFICATIONS AMPLlr-IER SECTION Power Output: Musi c 1 Power Output: Continuous Power Output:

6、 Total llarmo nic Distortio n: IM Distortioll: Drllping Factor: FroClu8 11 CY Responso: RIAA Ouvia tio n: Sens itivit v aud lmpcdanco : Phono Ovet load: Signal-lo-Noisu Ratio: Tone COIlIIOls: MUling: TUNER SECTION FM : Tuning Rango : Usabio Sunsitivitv: 50cJO Ouio rinp Snnsitivitv: Captut e Ralio: I

7、mago Heiectiou Ratio: Ir: Rojoclioll Rlio: Signal-lo-Noiso Ratio: Selecti vity AM Suppression Ratio: ll arruo nic DIslortion: Froquuncv Rosp onso: St oreo Separ arion: AM: Tuning Rango : Usable Sensitivitv: Image Rejoclion Hario: IF Rejeclion Ralio: Signal -Io-Noise Ratio : Harm onie Otstoulou: GENE

8、RAL Dimensions (W x H x D): Weight: 45 watts per channel, min. RMS. at 8 ohrns, both channels driven. from 20Hz to 20kHz. w ith no more than 0.08% TH D. 2 x 126 watts at 4 ohrns. 1kHz (DIN) 2 x 78 watts at 8 ohms, 1kHz (DIN) 2 x 70 watts at 4 ohms, 1kHz (DIN) 2 x 55 watts at 8 ohrns, 1kHz (DIN) 0.08

9、% at rated power 0.08% at 1 watt outpur 0.08% at rated power 0.08 % at 1 watt ouput 35 at 8 ohms 20 -30.000 Hz 1dB 20 -20.000 Hz 0.8dB Phono: 2.5mV/50 kohms CD/Tape Play: 150mV/50 kohms Tape Rec: 150mV/3.5 kohms (phono) 120mV RMS at lkHz, 0.08% THD Phono: 85dB (at 10rnV input, A weighted) 75dB (IHF

10、A-202) CD/Tape: 95dB (A weighted) 80dB (IHF A-202) Bass: 10dB at 100Hz Treble: 10dBatl0kHz -20dB 87 .5 108 .0MHz (50kHz steps) Mono: 12.8dBf. 1.2V. 75 ohms 1.0lV (S/N 26d B. 40kH z Devi.) 75 ohms DIN Stereo: 18.0dBf. 2 .2V. 75 ohms 23V(S/N 46dB. 40kHz Devi.) 75 ohms DIN Mono: 18 .0dBt. 2.2V. 75 ohms

11、 Stereo: 37.2dBf. 20V. 75 ohms 1.5dB 85dB 90dB Mono: 72dB Stereo: 66dB 50dB DIN (300kHz. 40kHz dev.) 50dB Mono: 0.15% Stereo: 0.30% 30 -15.000Hz 1.5dB 45dB at 1kHz 30dB at 100 -10.000Hz 522 -1611 kHz (9kHz steps) 30V lOdB 40dB 40dB 0.7% 435 x 110 x 315 mn 17-1/Sx C ;: W W C o -I a. w -4 PARTS LIST R

12、EF.NO . PART NO. DESCRIPTION Al 27100121 A Chassis A2 27 120943 A Back panel A3 27 130470 Bracket , shie lded A4 27 13046 8A Bracket, rad iat or A5 27 160201 A6 27130469 A A8 27190359A A9 27273030C AI0 28 133 176A A l l 28130242A A12 27300750 A13 27141122 AI4 27 14 1123A A15 272702 16 A2 1 27 110338

13、 8 27110339 8 A22 27 190525 27190526 A23 27 190105 A3 1 28 184356A 28 184357A A51 l AOO1121 lAOI012 1 A52 28140220 A61 27 175 130 A71 28322796 283 22795A A72 28322469 28322304 -1 A73 28322470 28322305-1 A74 2832292 2B 283 22923B A75 28322928 28322929 A76 28322924 28322925 A77 28322926A 28322927 A BI

14、 834430068 B2 83 1130088 B3 838 440089 B4 834430108 B5 82 143006 B6 830440089 B7 82 142004 833430080 B9 880011 BIO 830440109 Radiat or Bracket, power transforrner Holder, dial plate Join t L Back platc Dial plate Strainrclicf Bracket F Brack et R Spacer Fro nt bracket assy Front bracket assy Holder,

15、 slider Hold er, slider Holder, antenna Top cover Top cover Front panel assy Fro nt panel assy Cushion Leg Knob, Power Kno b, Power Knob, Speaker A Knob, Speakcr A Kriob , Spcaker B Knoh, Speaker II Knob, Volun $ Knob. Volume Knob, Tone Knob, Tone Knob, Slide Knob, Slide Knob , Push Knob , Push 3T r

16、S+6B(BC), Tapping scrcw 3Tn +8f, Tapping scrcw 4TTBSC(BC), Tap ping screw 31TS+I0B(B( ), Tapplug screw 3P+6 FN(BC), Pan hcad screw 4TTC+8C(BC), Tapping screw 2P+4 F(BC), Pan hcad screw 3TTP+8P(BC), Tapping screw Rivet 4TTC+I 0C(BC), Tapping screw REF .NO. Bll F90 2 F90 3, 1904 1905, F906 P304 P901 Q

17、508, Q608 Q509, Q609 Q902, Q905 T901 UI PART NO. 870060 252074 252078 252070 25060044 253 128B or 2531 30A 220 178 3, 2201 784 or 2201786 220 1773, 220 1774 or 220 1776 2201 754, 220 1755, 22014040r 220 1405 2300199 I A0085692A U2 I A0085702A U3 IA0085712A U4 I AOI35721 U5 1A01 3573-1 U6 l A013574 1

18、 U7 lA008575-2A UR I A01 35761A U9 I AOI35771 A UI0 I A0085782 Ull 1A008579-2 DESCRIPTION Flat washer 2A-SE-EAK, Fuse, prirnary 5A-SE-EAK , Fuse, secondary 1A-SE-EAK, Fuse, secon dary Terminal GND AS-CEE, Power supply cor d 2SC3854(0), 2SC3854(Y) or 2SC3854(P) 2SAI490(0), 2SA I490(Y) or 2S AI490(P)

19、2SDI9 13( R), 2SDI9 13(S), 2SDI406(Y) or 2S DI406(GR) .6. NPT-955G, Power transformer NAAR-2869-2 A, FM/ AM tuner pc board assy NADlS-2870-2A, Display pc board assy NAAF-2871-2A, Prearnplifier pc board assy NAAF-2872-1, Volume pc boa rd assy NAETC-28 73-1 , Volume rnotor pc board assy NADIS-287 4-1,

20、 Volume indicator pc board assy NAPS-2875-2A, Power amplifier and power supply pc board assy NASW-2876-1A, Speaker switch pc board assy NAETC-2877 -1A, Speaker terminal pc board ass y NAETC-2878-2, Remote contro l terminal pc board ass y NAAF-2879-2, Switch pc board assy NOTE: : Only Black mo del :

21、Only Silver mo de l NO TE: THE CO MPONENTS IDENTIFIED BY MARK AR E CR IT ICA L FOR RI SK O F FIR E AN D ELECTI C SHOCK. REPLACE ON LY WIT H PART NU MBE RS SPECIFIED . 88 - - - - - - CIRCUIT DESCRIPTIONS 1: Remote control decoder (LM6405G) x.i o t o-E Ta tun nr - INDIC fl TOR -t- . -t-r-PHo P E , ( P

22、L fI , ) -. PEo (PLA O ) f- PE I (P LA ) -. T -2 PG , Ph (PLfl7) PG2 .-+- - - PG, PHI TEST PH, PG o -+- t PA PA POo po, PAO -j PI2 PB 2 -I,-j ) 0- PB I PC p o , Pl I PI O PH, PA IN T P Oo -I-j V oo(5V) PCo PB - f-I ;0 E X.lal P F ( PL fI .) pc , E S p o PE (P LA 2 ) f- Vss Ta valu me ca ntral lC Ta

23、mute r Sw itch . VCR - 2 VCR - , c.p P H -.-L!J T- I Ta casset te t erminal 12V ;,.0-Ta CD term inal LM 64 05G MAIN OFF SP CTL BACK UP I N I T STAND BV POWER CTL PROTEC T REMOTE SENSOR T- 2 ONIOFF Descrlpti on !ill No . Code Xt al Ccr.unic rcso ua tor I ProsetSTATION U!sigIlai o utput terminal O utp

24、ut Lduring pu shing of rc motc co ntro lST AT ION LiI KEY 2 ST. ur lresct STATION DOWNsig naloutpur terminal OutputLduring pu shillgof rc motecoutro lST ATION D O WN K EY 3 51. DN (NDI TerminalIorindic ntiug Light recci ved by rcmotccoutrol ; duringliglu reccption,L is output5 7 Reset terminalRES VO

25、 L. U! VOLUME U!signa l o utpur tc rmiual Outputs L during pushing of VOLLiME ur KEY 8 VOL. DN VOLUME D OWN signal outpur terminal OUlpUI LUduring pu shingof VOI.UMEDOWN KEY 9 10 MUTING MUTI NG O N/OFF o Ulpullerlllinal Switching of L + H (ON = H)by nieansof renroteco ntrol A UDIO M UTING K EY -6 TX

26、- 7430 Pin No . Code Descrlprion 11 MUT-2 Muting signal out put terminal for T A PE-2 cha nge-ove r -1 during 200mS change-over tim e loTAPE-2 Selector signal output te rminul for VCR-2 cha nge-ove r L during 200mS aftcr pu shing rcmote control VCR-2 KEY 12 VCR-2 13 VCR-1 Selector signal ou tput ter

27、minal for VCR-I change-ov cr L during 200mS afrer pushing remote control VCR-1 KEY 14 C D Selector CD changc-over signal outpur terminal L during 200 mS aft cr pu shing remote control C D KEY Selector PHONO change-over signal out put terminal L during 200mS after pushing remote coutrol PHONO KEY Sel

28、ector signal output terminal for TUNER change-o vc r L during 200mS aftcr pushing renr ote control TUNER KEY Selcctor signal output terminal forTA PE-I change- ovc r L during 200mS after pushing remote cont rol TAPE-I KEY Selector signal outpul terminal for TAIE-1 change-ovc r Switching of J-I+- L b

29、y mcans o f rem ote co ntro!TA PE-2 KEY GND terminal Rcmote control signal input terminal TAPE-20N/OFF control input terminal 1-2 outpur is changed-ovcr wiih L input Proreeti on function input terminal; with J-I input , out put SI CTL H Power so urce condiiion input terminal ; connccts to POWER outp

30、ut ; POWER ON with H 15 PH 16 T U 17 1-1 18 1-2 21 G ND 22 REMIN 23 T -2CTL 24 PROTECr 25 CO NT IN 26 POWER Power so urce control outpur terminal Switching of H +- L (ON = H ) 27 STBY - T erminal for inclication during STANDI3Y; POWER reversing outpur Output terminal for stnrt of selector L c1uring

31、300mS wh cn pow er so urcc is ON O utput terminal for back up during STANDI3Y Speaker control outpur terminal (L =speake r output O N) 28 INIT 29 B . UP 30 SP CTL 31 M . OFF Main pow er sourcc OFF det cction termina I Serial signal outpur terminal for CD co ntrol usc Cassette deck controi signal out

32、pur terminal H during 200mS aft er pushing rernore conrrol REW KEY 33 C D MOD E 35 REW 36 Fr - Casseue deck control signal outpul te rminal H tluring 200mS after pu shing rern orc cont rol rr KEY Casse tte deck control signnl outpur terminal H during 200mS afte r pu shing remore cont rol REC KEY Cas

33、sc tte deck control signal o utput terrninnl H ehrring pu shing of rcinor c co ntro l ST O P K EY Ca ssette deck control signal o utpur terminal /-I timing 200mS after pushing remote cout rol PAUS E K EY Cassette c1eck control signal outpur terminal 1-1 during 200mS after push ing renr ot e cont rol

34、lLA Y KEY 37 REC 38 STOI 39 PAUSE 40 PLAY 41 Von Power so urce terminal Ccramic resonator conncction terminal42 Extal TX-7430 2. Controller connection .T CGP Sg -; - c z r rn c rn ()O !JJ -:i m O (J) JJ() rn z -; SI Se Sd Se Sb f 0 I g ib -. l KEY/O /OOE So K3 K2 el -le KI d MATRIX KO (J) _ (J) ; ;:

35、 ;: OII m O)N N (f) (J) (J) o c 00 JJ - - m .o - L. 5 T 06 05 04 03 02 0 1 XO X I Voo ! J 4 2 I 4 1 2 4 0 3 3 9 4 38 5 37 6 36 7 35 8 34 9 10 I I 3 3 12 32 3 1 13 30 29 14 /5 28 /6 27 17 2 6 18 25 24 19 2 3 20 2 1 22 MUT E AUTO/MA NUAL UP Irorn DO WN remot e con trol INT A B 070 5 BCD TO C DECIMAL D

36、ECODE R 0 FM 0 112 , 0 1 11 AM + B AM +B SW MW LW SHIFT AM 10 P S C I AM I Q7 01 PULSE FM FM 11- SWALLOW 10 I . PRESCALER LOCAL CE OSC EOI I I 01 0 4, 0105 VT t E02 L.P. F. I 070 3 . NOIS E SO GATE I IF L EVE L CIRCUIT I in No . I Sym bo l ( (J P Te rmi nal - - . O u tp ut term inal Io r sound - - -

37、 - Dcscri p tion IE E . 2 - 8 S;l - SI Segme nt Oll I put s Displ ay t ube s i g n 1 te rmina l ou tp u r an d kc y rc ruru signa l source termi nals: ac ti vc hi gh. Sincc Ih esc termi nal-, can h,lIl d le JOV, th e y are co nncc rcd d irec t ly to th e seg meut terminuls of ih e tl uorescen t di s

38、pla y tube. lJ 12 - KO -K J K ey retu rn sig ll!l in pui s Te rmiuat s ro r in p ut o f t hc key ret u rn sigllals lrom extc ru al maui x circuit. D-I S IJI -1)6 D igit ou tpu ls D isplay tu bc digil out pul signal te n u iua is: rc tur n signal so urcc to di odc matri x. nc ti ve lo w. 0 1 is uscd

39、th e key IlJ, 20 X I . X 2 X l al Conuec t 10 t he 4.5M H z crysral osci llutor. 2 1 V DO Po w er sot I rce inpu t Dev ice pow c r so 1I rce tc rmi nal ; sli ppl ie5 5V dnril lg no rma l operanon and ro ru the super capaci tor C7 14 Ior memo ry preservat ion. 2.5 V - 8 TX- 7430 Pin No . Symbol Te rm

40、ina l Dc scripiion 22 SO Sta tion det eetor signal input Input termi nal for de tee ting whethcr or not a brondcast signal is bcing reeeiv ed d uri ng uu io-tu ning. Stopped by t he high level. 2:, 24 EOI, E02 Error o u rp u rs Charge pum p ou tp ur of thc phas e detecror with cons i i ru res th e P

41、L L. High level is o utpu t whc n t he dividcd oscillation frcqu c ucy is highcr rhan ihc refc ren cc frcqu cn cy. In th e op pos iie case , low le vel is output. Floa ting occ urcs whcn thc frcq ucucies match . T he outpur is npp licd 10 the varia ble ca pacitor diode in rhe fro nt end throu gh rhc

42、 low pass filler Q I04 a nd Q I05 . T he ou lpu t fro m bot h tcrm iuals is sa me , but o nly E0 2 is usc tl. 25 CE Chip enable Deviee selcction signal inp ut termin al . High lcvcl l. ow le vel . Mem ory pre sc rv.u ion . No rma l op era no n 26 FM FM local ose illato r slgnal input Input termin al

43、 or FM loeal osc ill.uor is divided by I/l o o r 1/17 by prcscalcr Q7()1. - - 27 AM A M loeal osc illa ro r signa l input Termin al for inp ut o f ihe A M local oscill.uor signal. 2R PSC Pu lse swallow com ro l ou tpu t Thi s terminal outpu ts a signal t luu swirchcs t he pre sc.iler division r.uio

44、of Q70 1 to 1/10 o r 1/17 whe n rhc pu lse swa llow meihod is used or d ivision. (FM only) 29 G NO Grou nd - 30 SHIFT Pre set rcve rsc indieatio n ou tp ur Te rmina l fo r ind ienn on ou tp ul whei her MI - M8: Low lcvcl M9 - M 10: High MI - MS o r M9 - MI Il the prese t key. level 31 32 LW MW Ba nd

45、 switching signal o urputs Terminals for signal o utpul switehing of cach band . High level is outp ul frorn terminal of FM (pi n 110. 33) .md low lcve l is out put lro rn o rher t e rm inals (pin no . 3 1 nctivc high . T in: muti ug signal is outpur as show n below . UP/OOWN of manu ul/au to moc le

46、 , presel Illelllory is reeall ed , b.uid swirching ancl preset scan. TX7430 Control key and diode matrix connections K3(1) K2( 111) KI (II) KII( 12) - Sg(2) M4 /M 14 M3 /MIJ M2/M 12 MI /MII Sr(3) MH/MI H M7/M17 MUM I(, M5/M1 5 - Se(4) IIU,SET MIIJIM20 M3/M IY SCA N _ . - . _-. - Sd(5) S I-f1n LW M

47、W M Sc(6) A UTO M EM OI Y I) OWN UI MAN UAL Sb(7) HI -l l L lNIJ I) IS I I.A Y IR O GI A M W IDEI N A R IW W - Sa( H) l0/ik Hz LW2 LW I AM - - ) I (I H) I3A N I) 0 IJA N D I I11tH STAT IC/ DY N A Diode 1111 rix rnblc I llA N DIl BA N D I I E GI O N FIE QUEN C Y C I IA NN E L HANG E SIACE - - _ . - D7 J0 1)70 1 0 0 U S .A . R7.1-107.1M Hz 200k H,. 1 I Europe 87 .50-I08.00 M H z 50k Hz. A M IOkH ,J9kHz FI E Q UE N C Y I A N GE CII ANN EL SIAC E D711 lJ 0 530- 1620 kH z 10kH z 0 - I 1 52216 1l kHz 9kHz 11 53 1- IW2k Hz 1k Hz .- 0: O