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TX·7430
SER IAL NO. 32 58
ONKYO,~,
SERVICE MANUAL
aUARTZ SYNTHESIZED
TUNER AMPLIFIER
MODEL TX-7430
SAFETY-RELATED COMPONENT WARNING!!
COMPONE NTS IDENTIFI ED BY MARK ON THE SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR RISK OF F IRE AND ELECTRI C SHOCK. REPLACE TH ESE COMPONENTS WITH ONKYO PARTS WHOSE PARTS NUMBERS APPEAR AS SHOWN IN THIS MANUAL. MAKE LEAKAGE-CURR ENT OR RESISTANCE MEA SUREMENTS TO DETERMINE TH AT EXPOSED PARTS ARE ACCEPTA BLY INSULATED FROM TH E SUPPLY CIRCUIT BEFORE RETURNIN G THE APPLIANCE TO TH E CUSTOMER.
TABLE OF CONTENTS
Specification s Service procedur es Exploded view Parts list . . . . . . . . . . . . . . . . Circuit descr iption s Block diagram - Amp . section - Tuner section Block diagram of IC Packing view .. . . . . . . . . . . . Adjustmen t procedures Pc bca rd view/p arts list
Power amp . . . . . . . . . . . . . FM /AM tun er Display . . . . . . . . . . . . . . . Pream p. . Remot e cuntrol . . . . . . . . .
Switch Sp ea ke r
L.
_. . . . . . . . . . . . . . ... ... ... ... .. .. .. ... ... ..... ., . . . . . . . . . . .. . . . . . . . . . . . . . .. _ _ . ..
2
3
. 4
. 5
6
12
13
14
17
18
Volume Schematic diagram
Amp. sect ion Tuner sect ion Disassembli ng prccedu res
. . . . . . . . . . . . . .. 2 1
25
. . . . . . . . . . . . . . . 29
_ . . . . . . . . . 30
. . . . . . . . . . . . . . . 3 1
3 1
32
32
" 23
27
33
ONKYO®
AUDIO COMPONfNTS
- 1
SPECIFICATIONS
AMPLlr-IER SECTION
Power Output :
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 % at rated power
0 .08% at 1 watt outpur
0.08% at rate d 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 'l k Hz , 0.08% THD Phono : 85dB (at 10rnV input, A weighted) 75dB (IHF A-202) CD/Tape: 95dB (A weighted) 80dB (IHF A-202) Bass: ± 10dB at 100Hz ±10dBatl0kHz Treble : -20dB
Musi c ~1
Powe r Output :
Continuous Po wer Outp ut:
Total l l arm o ni c Di s tor tio n:
IM Distort ioll :
D~rllping Fa ctor:
FroClu8 11 CY Responso:
RIAA Ou via tio n:
Se ns iti vit v aud lmp c d a n co :
Pho no O vet lo a d : Signal-lo-Noisu Ratio :
Tone COIlIIOls:
MUl ing: TUNER SECTION
FM :
Tuning Rango :
Usabio Sunsiti vitv:
50cJO Ouio rinp Snnsitivitv: Captut e Ralio:
Imago Hei ectiou Ratio :
Ir: Rojocli oll R~lio:
Signal -lo -Noiso Rati o:
Selecti vit y
AM Suppression Ratio:
l l arruo nic DIslortion :
Froquuncv Rosp onso :
St ore o Se par ari o n:
87 .5 108 .0MHz (50kHz steps) Mono : 12.8dBf. 1.2~V. 75 ohms 1.0\lV (S/N 26d B. 40kH z Devi .) 75 ohms DIN Stereo : 1 8.0dBf. 2 .2~V. 75 ohms 23~V(S/N 46dB. 40kHz Devi .) 75 ohms DIN Mono: 18 .0dBt. 2.2~V. 75 ohms 37.2dBf . 20~V. 75 ohms Stereo: 1.5dB 85dB 90dB 72dB Mono: 66dB Stereo: 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)
30~V
AM:
Tuning Rango :
Usable Sensitivitv:
Image Rejo clion Hario: IF Rejeclion Ralio : Signal -Io-Noise Ratio : Harm onie Otstoulou: GENERAL
Dimensions (W x H x D): Weight:
435 x 1 1 0 x 3<15 m[n 17 -1/S" x <1 -3/S "x 13-1/r
7.5 kg .. 16 .5 Ibs.
Spec llicatiorts arid Ieatur es are subject to chanqe without notice.
-2
TX·7430
Remote Control transmitter RC -82S
Tr ansmiu er : Sign nl rang e: Inlrared
Power supply: Dim ensrions (W x H x 0) :
Weight :
Appr o x. 5 meters (1 6ft. 4 ") Two "AA" baueries (l .5V x 2 )
64 x 18 x 149 mm 2-1/2" x 11/16" x 5-7/8 " 110 gr am s 3 .9 oz . (in clutl ing uaueri es)
SERVICE PROCEDURES
1. Replacing the fuses
0111\ '
f or co n t inucd prrn cc t ion ;);:;Ulls t lir c ha za rd.re plnc e w ith sa u re t vp e and s.u uc rat ing (u se . Cir cu it no. Part no . De scripti on f9 0 2 25207 5 2.5A-SE-EAK, Pri mary f903 , P9 04 252078 5A-SE-EAK, Se condary P905 252070 lA-SE-EAK , Sccondary
2 . Change of FM/AM band step.
Thi s mo de l is not loca red Ih e band sc lcc to r sw ilc h.
If th e PM band st ep is eha nged fro m 50k Hz 10 20 0k Hz , rcm ovc rwo
di ed es (lSS133) to 07 0 9 a nd 0710 on th e d ispla y PC boar d.
If th e A M band st cp is c hungc d from 9kH z to 10kHz, rernov e 01 di o dc
(lS S133) 10 0711 on th e di spluy PC bo ard.
o II0 o , o
3. Memory preservati on
Th is un it does 1I0t req uir e m emor y pr eserva t ion bau c r ies . A hu ilt- in me mory power bac k - up sy s tem p rese rves co n ten ts 0 1 th e m emory durin g powe r lailures and eve n w hen t he unit is un plugged . Th e unit rnust he plugged in and th e pow er sw itch t urn ed Oll a nd oll on ce in o rd e r to char ge th e ba ck -up s ys te m . No te rhnt since t h is is no t a perma ne n t m em o ry ,t he po wer s w itc h rnu st be turn ed 00 a nd o ff a few ti m es eac h mont h 10 keep t he ba ck -u p sy s tern o pe ra tive . Th e per iod o f ti m e dur ing whic h m em o r y co nte n ts ar e p rese rv ed after pow er has la st been t u rn ed o ff va r ies d cpen din g on climat e and placement o f th e unit. On the ave r age, m em ory co n te n ts are p ro tec ted over a pe ri od o f 3 10 4 wee k s (a mi nimu m of 2 wee k s) af te r t he la st t im e po wer ha s been turncd o ff. T his pe riod is sh or ler w he n the un it is ex poscd to ve ry hi gh hum idit y o r used in an a rc a with an ex t re m el y humid c lim a te.
Pli .
0
1 10
o
0'
vc r
TX·1430
o
0 '
Q
;:
W >
o --I
C W
C
a. ><
w
-4
PARTS LIST
REF.NO . Al A2 A3 A4 A5 A6 A8 A9 A I0 All A1 2 A 13 A I4 A 15 A2 1 A22 A23 A3 1 A5 1 A52 A6 1 A71 A72 A 73 A74 A75 A76 A77 BI B2 B3 B4 B5 B6 B7 88 B9 BI O PART NO. 27100 121 A 27 1209 43 A 27 13 04 70 27 130 46 8A 27 16020 1 27130 469 A 27 190 359 A 272 73 030C 28 133 176A 28130242A 27 300750 27141122 27 14 11 2 3 A 272702 16 27 110338 8 27110339 8 27 190525 27 190526 27 190 105 28 184356A 28 184357A l AOO1121 lA OI 0 12 1 28140 2 20 27 175 13 0 28 32 2796 283 227 95 A 28322469 28 322 304 -1 28322 470 2832230 5- 1 28 322 92 2 B 283 22923B 28322928 28322929 28322924 28322925 28322926A 28322927 A 83 4430068 83 1 1300 8 8 838 44008 9 83 4 4301 08 82 14300 6 8 30 440089 82 142004 833430080 8800 11 830 440109 DESCRIPTION Ch assis Back panel Bracket , shie lde d Bracke t , rad iat or Ra d iat or Bracke t, po wer tr a nsforrne r Hol der, dial plat e Join t L Back platc Dial plate REF .NO. Bll F90 2 F90 3 , 1"9 04 1"90 5 , F906 P304 P901 Q508 , Q60 8 PART NO. 870060 252074 252078 252070 25060044 253 128B or 2531 30A 220 178 3, 2201 784 or 2 201786 220 1773, 220 177 4 o r 220 1776 2 201 7 54 , 220 1755 , 22014040r 220 1405 2300 199 I A0 085 69 ·2 A I A00 85 70·2A IA0 0 85 71·2A I AOI3572 · 1 1 A01 35 7 3-1 l A013574 · 1 lA008575-2A I A01 35 7 6· 1A I AOI3577 ·1 A I A0 0 85 7 8·2 1A00 85 79-2 DESCRIPTION
~ 2A-SE- EAK, Fu se, prirna r y
Flat was he r
~ 5 A-SE-EAK , Fu se, seco nda ry
~ 1 A-SE-EA K, Fuse , secon dary Terminal GND ~ AS-CEE, Po wer supply cor d
~ Strainrclicf
Bracket F Brack et R Spacer Fro nt b racket ass 'y < S> Fro nt br ack et ass'y < B> Holder, slide r < S> Hold er , slide r < B> Holder , an te nna To p cove r < S> T op cove r < B> Front pane l ass'y < S> Fro nt pa ne l ass 'y < B>
Q509, Q6 09
Q902 , Q905
T901 UI
.6.
U2 U3
U4 U5 U6 U7 UR U9 UI0 Ull
Cushion
Leg Knob, Power < S> Kno b, Power < B> Knob, Sp eak er A < 5> Knob , Speakcr A <8 '> Kriob , Spca ker B <5 > Kn oh , Speaker II K nob , Volun·· $' Kno b. Vo lum e < B> Kn ob, Ton e < S> Kno b, T on e < B> Kn o b , Slide < 5> Kn o b, Slide < B> Knob , Push < S> Kn ob , Push < B> 3T r S+6 B(BC) , Tappi ng scrcw 3Tn \'+8 f\ , Tapp ing scrcw 4 TTB "'SC( BC), Tap ping sc re w 31TS+I0B (B(' ), Tapplug screw 3P+6 FN(B C) , Pan hcad screw 4 TTC+8C(B C) , Tapp ing screw 2P+4 F(B C) , Pan hcad screw 3TTP+8P (BC), Tapping screw Rivet 4TTC+I 0C(BC) , Tapping screw
2SC3854(0),
2SC3854(Y) or
2SC3854(P)
2SAI490(0),
2SA I490(Y ) or
2S A I 4 90( P)
2S D I9 13( R) ,
2S D I9 13(S),
2S D I406(Y) or
2S DI 406(G R)
NPT-95 5G , Po wer t ran sform er NAAR-2869-2 A, F M/ AM tuner pc board ass'y NADlS-2870-2A , Displ ay pc b oard ass'y NAAF-2871-2A, Prearn pli f'ier pc board ass'y NAAF-2872-1, Volum e pc boa rd ass'y NAETC-28 73-1 , Volume rno to r pc board ass 'y NAD IS-287 4-1, Vo lume indicator pc boa rd ass' y NAPS-2875 -2 A, Po wer amplifier an d power supp ly pc board ass 'y NAS W-2876-1 A, Speaker switc h pc boar d ass'y NAETC-2 877 -1A, Speaker te rm ina l pc bo ar d ass' y NA ETC-2878-2, Rem ote co ntro l te rm inal pc board ass' y NAAF-2879-2, Switch pc board
ass'y
NOTE : : Only Black mo del < S>: On ly Silver mo de l
NO T E: TH E CO M PON E NTS IDENTIFIE D BY MARK~ AR E C R IT ICA L FOR RI SK O F FI R E AN D ELECTI C SHOCK. REPL A CE ON LY W IT H PART NU M BE RS SP EC IF IE D .
CIRCUIT DESCRIPTIONS
1: Remote control decoder (LM6405G)
x. i o t
Ta tun nr {
~f----
o---E
E X.la l
PCo pc ,
V oo( '5V)
PB' PB 2 -
- f- - I,-----
-
- I ;>0-j
) 0---
-
I N DIC fl TOR
PC] IN T
PB I
P Oo - - I'---PA' PA> PA '
--j
Ta cas set t e t erminal
· 12 V
~E S
T a valu m e [ ca n tra l lC
PO o po, p o> po , P Eo (PLA O ) PE
I
r
T a mut e [ Sw itc h ..
VCR - 2 VCR - ,
LM 64 05G
PAO -~----j P I2
;,.0----
T a CD t erm i nal
Pl I
PI O
f----
-
-
M AIN
OFF
(P LA' )
-~---..
-~---..
SP CTL
BACK UP INIT ST AND BV
c.p
PH
PE > (P LA 2 ) P E , ( PL fI , )
PH, P H, PHI
PHo
- -t-- - - .. - -t-- -r--
---.-L!J
T- I
T- 2
PO WER C TL
P F> ( PL fI .) Ph (P Lfl7) TEST
PG , PG2 ..PG, PG o -~----+--- R E M O TE S ENSOR T- 2 ON IO FF
+-- - -
PROTEC T
Vss
t
!'ill No .
-- - - - - - - -- - - X 't al ST.
C cr.u n ic r c so ua to r
Co de
Descrlpti on
---
I
2
ur
Pr oset STATION U!' sigIlai o u tp u t ter min al O u t p u t "L" durin g pu shin g o f rc m o tc co n tro l ST AT IO N Li I' KEY l'r es ct STATION D OWN sig na l outpur te rmin al Output " L" durin g pu shillg o f rc mote co u t ro l ST AT IO N D O W N K EY T erminal Ior indic ntiug L ig h t re cci ved b y rcm otc cout rol ; during liglu re c cpti on , "L" is output R eset termin al V OLUME U!' s ig na l o u tp u r tc rmiu al Outputs "L" during push in g o f VOLLiME
3 5 7
51'. D N
(NDI RE S V O L. U!'
8 9
ur KEY
VOL. DN
V OLUM E D OW N s ig na l o u tp u r term inal OUlpUI " L Udurin g pu shing o f VOI.UM E DOWN K E Y MUTI NG O N/OFF o Ulpull erlllinal Switchin g of " L " ++" H" (ON = " H") by niean s o f renr ote co n t ro l A UDI O M UTIN G K EY
10
MUTIN G
-6
TX-7430
Pin No .
Code MUT-2 VCR-2
Descrlpri on
Muting sig na l out put terminal for T A PE-2 cha nge- o ve r ''\-'1'' during 200mS change-over tim e loTAPE-2 Select or sig na l o u t pu t te rminul for VCR-2 cha nge -o ve r "L" during 200mS aftcr pu shing rcmote control VCR-2 KEY Select or sig na l o u tp u t terminal for VCR-I ch a nge- ov c r " L " during 200mS afr er pu shing remote control VCR -1 KEY Select o r CD changc-over sig na l outpur terminal " L" during 200 mS aft cr pu shing remot e control C D KEY Select or PHONO change- over sign al out put terminal "L" during 200mS after pu shing remote co u t ro l PHONO KEY Select or sig n a l o u tp u t terminal for TUNER cha nge -o vc r "L" during 200mS aftcr pu shing renr ote control TUN ER KEY Selcct or sig na l o u tp u t terminal forT A PE-I ch a nge- o vc r " L " during 200mS after pu shing remote cont rol TAPE-I KEY Select or s ig na l o u tpu l terminal for TA I'E-1 c ha nge -o vc r Swit ching of " J-I" +-> " L " by mcans o f rem o te co nt ro ! TA PE-2 K E Y GND terminal R cmote control sig na l input terminal TAPE-20N/OFF control input terminal 1'-2 outpur is changed-ovcr wiih "L" input Pror e eti on function input terminal; with " J-I " input , out put SI' CTL " H " Power so u rce condiiion input terminal ; connc ct s to POWER output ; POWER ON with " H" Power so u rce control outpur terminal Switching of "H" +-> "L" (ON = "H ") T erminal for inclication during STANDI3Y ; POWER reversing o u tp u r Output terminal for stnrt of selector " L " c1uring 300mS wh cn pow er so u rcc is ON O u t pu t terminal for back up during STANDI3Y Speaker control o u t p ur terminal ("L"
11
12
13
VCR -1
14
CD PH
15
16
17
TU
1'-1
18
1'-2
21 22 23
G ND REMIN T -2CTL
24 25 26
PROTECr C O NT IN POWER STBY INIT
--
27
28 29 30 31 33 35 36 37 38 39
B . UP SP CTL M . OFF C D MO D E REW
= s pe a ke r o u tp u t O N )
M ain p ow er sourcc OFF d et cction termina I Serial s ig na l outpur termin al for CD co n t ro l usc Cassett e deck controi signal o u tp u r terminal "H" during 200m S aft er pu shing rern or e conrrol REW KEY
Fr
REC STOI' PAUSE
C asse ue d eck control sig na l o u t pu l te r m ina l " H " tluring 200mS after pu shing rern or c cont rol
rr K EY
C as se tte d e ck control signnl o u tp u r terminal " H " durin g 200 m S a fte r pu shing rem or e cont rol REC KEY C assc tte deck control signal o u tp u t terrninnl "H" ehrring pu shing o f rcin or c co n t ro l ST O P K EY Ca ssett e deck control signal o u tp u r terminal "/-I" timin g 200mS after pu shing rem ote cout rol PAUS E K EY Casse t te c1eck control sig n a l o u tp u r termin al " 1-1 " durin g 200m S a fte r pu sh ing renr ot e cont roll'LA Y KEY Power so urce terminal Ccrami c re sonator connccti on terminal
40 41
PLAY
V on E xtal
42
TX-7430
2. Controller co n ne c t io n
CGP
\..T
I 2 3 4 5 6 7 8 9 10 I I 12 13 14 /5 /6 17 18
\J
42
4 1
MUT E AUTO/MA NUAL UP DO WN I NT
070 5
Sg
rn ~ c
-; --" c z r
SI Se Sd Se Sb
-.
40 39 38
Iro rn remot e con trol
rn
()O
!>JJ
O
-:i m
(J)
JJ()
rn
z -;
37 A 36 B C 35 34 0 BCD TO DECIMAL DECODE R
So
0
f
Ig
(J) _
l
KEY/O /OOE MATRIX
K3 K2 KI KO 06 05 04 03 02 01
ib
el
- le d
(J) <0
33 32 3 1 30 29 28 27 26 25
FM MW
~
0 112 , 0 1 11
AM + B
AM +B SW
0 ;:: -" (J) ::E3: 0 __
(Jl
rn 0
C
-q
LW SHIFT
-
~ CD GlI-I-1
o ~ -
--J
m
-" .o
0
.l>
0 11 1 - N -
(J)
-
-
~I PSC
AM
AM 10 Q7 01 PULSE SWALLOW PRESCALER
I
1 -1
~ ~
.FM
CE EOI E 02
FM
10
~ CD
;>; ;:: ;::
OII m
O)N N
I
LOCAL OSC
L......
~(f)
(J) (J) o c>
0<0
JJ
XO
-<
5 T
!~
19 20 21
24 23
XI Voo
I 01 0 F. 0105 4, L.P.
VT
I
t
NOI S E IF L EVE L
22
SO
I
I
07 0 3
GATE CIRCUIT
.
I' in No .
Sym bo l
( '(J P
Te rmi nal
..
Dcscri p t ion
O u tp u t term inal Io r so und ''I'E E'' .
I
2 - 8
- -
S;l - SI'
Segme nt
Oll I put
- - - ac t i vc hi gh.
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 te rmi nals: 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 uor escen t di spla y tub e.
lJ 12 KO - K J
K ey re tu r n sig ll
Te rmiuat s ro r in p ut o f t hc key ret u r n sigll als lrom extc ru al maui x circuit.
in pui s
-
D-
IS
IJI - 1)6
D igit ou tpu ls
D isplay tu bc d igil o ut pul signal te n u iua is: nc t i ve lo w. 0 1 is uscd th e k ey rc tur n signal so urcc to di odc matri x.
Conu ec t 10 t he 4 .5M H z crysra l osci llutor.
I lJ, 20
X I. X2 V DO
X 'l al
Po w er sot I rce
21
inpu t
Dev ice pow c r so 1I rce tc rmi nal ; sli ppl ie 5 5V dnr il lg no rma l operanon and 2.5 V
[ro ru the super capaci to r C7 14 Io r memo ry preservat ion .
- 8
TX-7430
Pin No .
Symbo l SO
Te rmi na l Sta tion det eetor signal input
Error o u rp u rs
Dc scripii on
Input termi nal for de tee ting whethcr or not a bro ndcast signal is bcing reeeiv ed d uri ng uu io- tu ning. Stopped by t he high level. Charge pum p ou tp ur of thc phas e detecror with cons i i ru res th e PL L. High lev el is o utpu t whc n t he di vidcd oscillati on frcqu c ucy is high cr rhan ih c refc ren cc frcqu cn cy. In th e op pos iie case , low le vel is o utput. Floa ting occ urcs whcn thc frcq uc ucies match . T he o utpur is npp licd 10 the varia ble ca pac itor d iod e in rhe fro nt end throu gh rhc lo w 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. Devi ee selcction signal inp ut termin al . High lcvcl . .. No rma l op era no n l. ow le vel .. . Mem ory pre sc rv.u io n Input termin al [or FM loeal osc ill.uor is divided by I/l o o r 1/17 by prc scalcr Q7()1.
22
2:\, 24
EOI, E02
25
CE
C hip enab le
26
FM
FM lo cal ose illato r
slgna l input
-- --
27
AM
A M loeal osc illa ro r
signa l inp u t
Termin al for inp ut o f ih e A M local oscill.uor signa l.
2R
PSC
Pu lse swallow
co m ro l ou tpu t
Thi s termin al outpu ts a signal t luu swirchcs t he pre sc.iler division r.uio of Q70 1 to 1/10 o r 1/17 whe n rhc pu lse swa llow me ih od is used [or d ivision. (FM o nly)
29 30
G NO SHIFT
Grou nd
--
Pre set rcve rsc indieatio n ou tp ur Ba nd switching signa l o u rputs
-
Te rmina l fo r ind ienn o n ou tp ul whei her MI - MS o r M9 - MI Il the prese t key. MI - M8: Low lcvc l M9 - M 10: High level Terminal s for signa l o utpul switehing of cach band . High level is o u tp ul frorn terminal of FM (pi n 110. 33) .md low lcve l is out put lro rn o rher t e rm ina ls (pin no . 3 1 & 32) d u riug r M rece prio n
31 32 33 34 35
30
LW MW r-M
..
-
37
A B C 0
Prese t sra rio n indica rion OUlpUIS
Te rmi na ls for ßCO code o utpur of pre sc t stutio n indic.uor. MI M2 M3 M4 M5 MIl M7 MS () () () I 0 I A I I () 0 I I 0 n () I I () () () () I I I C I () () () () () () () 0 I Not uscd.
3R 39
INT MEMO R Y Merno ry down inpu t
Terminal for down signal inp ut o f p re set mc m ory. Acriv e lo w. T ermin al fo r up signa l inpu t of pre sc t mem o ry. Ac iive low.
-
,.j()
ME MOR Y UP AUTOI MANUAL MUTE
Mem ory up
inpu t
4\
A uto/Ma nu al indi cation outpur Mur ing o ut pu l
Te rmina l Ior irul ica tion output whe t her o r auto i he tuni ng mod e. T h is term inal becom es hig h d m ing ,111 10 morle a nd low (hlring munu nl mo de , O utput termin al which mutes rhe shoc k noisc oeeurrin g whcn rhe PLL is released; nctivc high . T in: muti ug signa l is outpur as show n be low . UP/OOWN o f manu ul/au to moc le , presel Illelllory is reeall ed , b.uid swirching ancl preset scan.
42
TX·7430
Control key and diode matrix connections
K3('1)
' -
K2( 111) M3 /MIJ M 7/M17
-
KI (II) M 2/M 12 MU M I(,
KII( 12) MI /MII
llA N DIl
BA N D I 1)70 '1 0
I ~E GI O N
FI~E QUEN C Y
Sg(2) S r(3 ) Se(4)
M4 /M 14 M H/MI H
-- - _ .
D7 J 0 0 U S .A .
H AN G E
-
C I IA NN E L S I'A CE
-
MIIJIM20
_ .
S d(5) Sc(6) Sb( 7) S a( H) S If1n A UTO MAN UAL HI -l l L l'NIJ 'l0/'ik H z ' I3A N I) 0
I'IU, S E T SC A N LW
M EM OI ~ Y
---
M3/M IY
..
M 5/M1 5
R7.'1- 107 .'1M Hz 87 .5 0 - I08 .00 M H z
200 k H ,. 50k Hz.
--
MW I) OWN
_ --.
-
1
0 : Op e n
I
E u ro pe
"M UI' W I DEI N A R IW W 'A M
I : Co n ue c t the di ocle (I SSI3 3) .
tnhle 2
AM
IOkH , J9 kH z D711
I) IS I' I.A Y ' LW 2 ' IJ A N D I
I'R O GI ~ A M
FI~ E Q UE N C Y I ~A N GE
C II ANN EL S I'AC E
-
' LW I
-
-
- -- STA T IC/ DY N A
- - ----
rnblc I
lJ
0
53 0- 1620 k H z 522 16 1 l k Hz
10kH z 9 k Hz '1k Hz
[) I (I H)
· Diode 111"1 rix
' I11tH
-
0 I
1 11
.-
53 1- IW2k Hz
11 : O pen
n A N DII, DANDI lO/lIkH z .
I : Co uncct the d iod e ( 1.'1.'1 133) .
ia ble 3
.. .. "M I" I/\(I oc l l illgs . Se e tn ble 2 . .... AM I,," \(I oe ll illgs . See tub le 3.
3 . Muting circuit
l ro m mUl i n9 Ou IPU! 0 ' c o o trou e r
rc 070 2
ri1\ '12
Lch
01 0 3
FM IF &
0 106
8
, --
-
-,
fr om TKC
020 4
AM rad io
sv s t am
011 2
0 7 15
Reh
R7 5 3
M ONO
16
0 20 1 S tereo dec oder
The rnuting circuit o pe r at es in t he fo llo wing c a se s , 1 .Wb ile pi1l 4 2 o f co ut roll er IC ou t p u ls t hc high lcvc l. Q207 and Q208 ar e tumed on and muting is clo sed in t he foll ow ing "cascs.f While th e m a nu al UP/DOWN swi t ch is being held down. (2)When a st at ion in th e m emory is recalled . and (3) Whil e a radi o s ta t io n is be in g r ec e ive d using aut o se a rc h tuning . 2 . When an FM st a ti on is not be ing re ceived (a nd the muti ng switch is on) .
Thc IF levcl in thc I:M 110 sy stc ru (sct a t IUOI SO llllll ili g
Ü
is 0 I'C llC U a t 17 .Zd Br and zer o -c ross d ct ccti ou c ircu it (Iuning
po int 5 5 k Hz (100kHz st ep) : 30kHz. (5 0 kHz. st cp ) -ar c o u tp ut
a t p iu R th ro ugh th e A ND circ ui t. Wheu a sla t ion is tur ued ,
t lie o utp ut goe s to lh e 10 11' levcl .
"'h en o u tp ut gocs 10 t he 1011' level, Q1l 5 t ur ncd of'I,
Q I 16 is tu rn e d Oll a n d Q207 nn d Q2 08 a re tunr ed o ff,
so rnut ing is operred. At the sarne , pin 16 o f stereo de cod er Q201 goes t o th e lo w le vel . so the VCO osc illa to r s tart s ,
-1 0
TX·7430
4. PLL tuned circuit
26
I r- sc
A block diagram of the tuned of the PLL is shown in
the above diagram.
Operation during AM reception
(chan ged acc ordirng to the program code input) and the
divided rec ept ion frequency from the presca ler are combined in the c ontro! c ounter an d the presca ler' s
divi sion Iac ro r is swit ch ed 1/16 o r 1/!7 ac co rd ing to ex ternal co n tro l (I/!6 w he n th e PSC t erminal is "H " and 1/17 w he n it is " L " ). The st at ion osc illat o r frequenc y is app lied t o the program m able d iv ider . but the pr ograrnm abl e d ivider has an upper frequenc y limit o f only 30MHz. so the pulse swallow-type pr escaler which can be used up to ISOMHz.is insert ed for divi sion t o 1/Np; The sign a l is applied to the programmab le divider and divided t o l /N . T h e result is c om pared w it h a 25kHz frequ e n c y re fere n c e in the phase derector and error is outpur a s Eo until a rnatch is ob t a ined a s in AM operat ion .
i
The reception frequency is applied to the p ro gr arn ma ble d iv id e r wnere it is divi ded t o lI N and outpur as fv . This is applied to the phase cornpar aror w here it is cornparated w ith frequenc y reference fr (9k H z fo r G/W model s a nd 10kHz for D rn od el l . If fr and fv d iffer . E o equal t o the difference in Ireq uency is output.Since err or o u t p u r E o is a pulse waveforrn . it is passed t hr ough the low pass filter t o change it into oe volt age Vd , which is applied to the variable capacitor diode in the front en d to change the reception frequenc y . Thi s continues unt il fv and fr are the sarne and Eo·O .
Operation du r in g FM reception
The pulse swallow method is used in the pr escaler of thi s unit . In th is t ype o f prescaler . a supple rne nt ary number
5. Auto search tuning circuit
Q103
FM IF&AM SY STEM
12
8
+B
07 03
cc
-.J -.J
w
TO STEREO DECODER
D10 7
1""1
P
22N 0 OCC
06 u
TONED INDICATOR
r- f-
During FM recept ion . this is oper a ted b y the IF leve l derec ti on a nd zero cr oss detecti on ci rc u it s in cl ud ed in the FM I F & A M systern IC o f Q I03 a nd by th e no isc co m po ne nt d ete ct io n circ u it o f Q 113 . Wh e n a sta ti o n is tu n ed , th e o u tp u r o f a ll ou t p u ts go t o th e low level so Q703 goes fr om o n to o ff, ca us ing p in 22 of t he con tro lle r IC t o go to th e h igh leve l (0 co mp let e 3U to sea rc h t unin g. During AM recepti on. this is operared by the IF level derec tion included in th e FM IF & AM system JC o f Q I03. When a station is tumed . Q703 go es to off, causing p in 22 o f th e co ntr oll er JC t o go to th e hi gh l evel to co m p le te a ut o search tu ni ng.
Q 1 13
NOI SE DETECTOR
-11
TX·7430
.
o o
z z
z
IOtfJN O) ] l Ol" J l:l
S l "' NI "t:lH
l O t:l J NO '
UJ J.U I"I :TW) S
l l C!t' )1f
1 11' "
0
~ oe:(
I
Z 0 fCI)
.
z
Cl
a:
oe:(
0
w
U
U
~
w u..
er:
...J
Q.
m
...J
0
2
c
~
U
0
,
Q
I
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>
~
r
«
~ ~
>
u
>
-12
TX-7430
I
I
I
I
I
0 I
z
u
I
I
I
UJ
CI)
I L_
, ..
z
.
~
0:::
UJ
~
Z ::J
2
~ ~
c
0 0
II
.
a
BLOCK DIAGRAM OF IC
LC7818 (Function Switch)
Al ~-'...: ---j~ o '
I
1 1SW A}
1 1Sw .... )
I !.W8 )
1,0
,I
11sw8J
Cl ~
o1
EI
BI
0
~
' SCl
115w I
I SwCl
,I I l M'~ ,I mw" ' M GU I <>-I~ I --:;l fO~
11 swGI
OU T 1 -~
~ -'' ,I ~ s/ _ -
-+<:>\---I
ll 'i w I
r t sw )
r t sw
I
1" I" I" I" I"
11 ,w G)
A2
81
C1 02
oE 1
SOUilCE 7 1M7
OUf]
I"
11 Sw ' l
I"
MU TE
Voo VEE
-;
TM2
LC7818
TM! OU T1
1MC1L .,....;"-'----~>_-01
-
t..C l l
O---
"I "I
50 URCE 2
SOURCE I EI
01
BCTL o--'!..I _ -,--OL>--j ,, _
o o: z
8
o
;;.
u:
E2
~
w w
-----.l!.-..o
-----0
'JOD
>
I" ~V , '
VS \
02 C2 82
CI
81 AI
10
IU 11
I"
I
p PC116 1C3 (Stereo decoder)
p PA 8 0C (Buffer)
16 2
15
3
14
13 5
12 6
"
7
10
Rl 20K
R2
20 K
-14
TX·7430
LB1630 (Motor Drive)
Voull Voul2
TRUTH TABLE
IN 1
7
H
L
IN 2
L
OU T \
H
L
OUT 2
L
MOTOR
Normal
Rever s e
,--....,.---t--~..,...+-t-..,....~--,.---t---....,.--OVcc
H H
H
H
OFF OFF
eH
OFF
Wail Wait
L
L
LA1266 (FM IF and AM radio system)
Vconl
0 "
~
~
~
~
. .
~
~
~
~
2
l---+-------+..-II-~:)C>ND
~
s
·
~
x
s
~
Vinl
Vin 2
Pin6:NC
o
~
o o
"
~
o z o
74LS145 (BCD to decimal decoder)
NO
0 0
L L
INP UTS
C
L L L
B
L L
H H
A L
H
0
L
H H H H
H
,
H
,
H H
O uTP U T S
)
H H H
.
H H H H
s
H H H H H
6
H H H H H H
1
H H H H H
H
, ·
H H H H H H H H H H H H H H H
H
,
,
s
6
I
)
I
L
l l
L L L L
L
H
I.
H H H
H
.,
H H H H H H H H H H H
H H
L
H H H H
H
L
H H H H
H H
L L
H H
L
H
L
H
L
H H H H H H H H H H
L
H
H H H H H
H H H H H H H H H H
L
H H H H H H H
H
H
L
H H H H H H H H
·
·
"
H H H H H H H
C
L
L
H
H
l
H H H H
H
H
l
L
l
H H
L
"
H H H H H H
l
H
H H H
H
l
H
H
l l
H H
:1:
H
H H
H
H H
~ I:
H
H
H
H H
H
H
H
I1PA81C (Buffer)
16 15
14
13
12
11
10
,..----<_-+-I-.---.-_-+-+-- __- --.-+-_ - .._- ..-H >-----RBI
'--t----+--+---..--+-----..---,I---~_+_-----..-f-----~-_D 8
2
RBI '
5
20KO
6
Rl
20KO RB2 :
7
2KO R2 100K O
TX-7430
f1 PB553AC (Prescaler)
Pin Connection J. Pin J (Vcc)
2. 3. 4. 5. 6. 7.
Pin 2 (IN) Pin 3 (CHK) Pin 4 (GND ) Pin 5 (OUT) Pin 6 (PSC) Pin 7,8
........ +5 volts Su pp ly
..... ... FM Jocal oscillat o r sigual inpu t
........ Chec k termin al
........ Gro und terminal
........ Presca ler terminal
....... . Prescaler co ntrol ter minal
........ No t con nec ted
T iming Chart Block Diagram
IM
CHK
PSC
PSC X ((NADLE PUl St)
+-
f----
- - -..1
-
L
j
-+
--16
-+
OUI
-17 pvl s u
-
- - +-
PJh~s-~
(HK
IN
NJM4558!4559!4560 (Op . amplifier)
Vcc
BA6124!LB1403 (Sign al meter driver)
4066B!LC4966 (Analog switch)
SW 0 SW C
CONT A
' IN/ OUT ' b UT/ I N CaN T 0 OUTI I N I NI OUT
12
10
B
1 I Nl a UT
'-------~
5 OUTIIN Ca NT B Vss CaNT/ IN! , I N/ OUT! CONTC
SW B
SW A
TX ·7430
PACKING PROCEDURES
R E F. NO.
PART NO .
DES CR IPTION
1
2
3
4
5
6
7
8
29 10003 4
850 X650 m m, Pol y-vin yl bag 2905 145 6
Mast er ear to n box (Silver mod el) 29 0514 58
Mast er car to n bo x ( Blac k mod el) 282 30 1
Sea ling hoo k 290911 58A
Pad R 29 091 157
Pad L 29 11003 2
Tap e 2600 12
Dam plo n ta pc Aeeessary bag ass' y 2 934 1115
Ins tr uet io n manu a l 292 092
F M a ntc nna 232 1 19
NMA-3052, AM loop a nte nna 20 10 141
Co nnecti on cord for easselle deck 20 10 159
Co nnect ion cor d for C D player 30 1005 4
UM-3, Two batteries RC-8 2S, Remote co ntro! 24 140003
trans mitter 29365020
Warranty card 29 100006A
250 X 350mm , Poly-vinyl bag
ADJUSTMENT PROCEDURES
P reparation
· Input FM mono : 1kHz, 75 kHz devi., 60d B/pV FM stereo : 1kHz, L+R 67 .5kHz devi.: Pilot signal 19kHz 7 .5kHz devi. AM: 400Hz , 30% mod. , · Output Connect th e non-indu ctive type resistor o f 8 o hms to th e speake r terminal A o f Jen a nd right cha rmels unle ss o ther wise not ed . · Standard knob position TAPE MONITOR VOLUME BASS/TREBLE/BALANCE MODE '" , SPEAKER SIMULATED STEREO SELE CTIVE TON E CONTROL
SOURCE Maximum Center STEREO A , OFF OFF
Amplifier section J . Idling current adjustment C onnect the DC voltmet er to the terminals IID and V CT on th e power amplifier pc board . Adjust the serni-fixed resistors R507 and R60 7 so that the indic ation of voltrnet er is 7.5 ± 1.5mV. Notes: VOLUME Maximum , Open load , Adjust after switching on for 5 minutes.
J
" °0 °
u
x
,
°
0
~
w >
u
.J
00
~ 0
x
u w >
~
°0°"'
00
Power amplif ier pe boa rd
F 90 2
I H
_ F 9 01
I
o: ~
6 6
<]
~ ~ ~~ ~
-18
TX·7430
PRINTED CIRCUIT BOARD - PARTS LIST
POWER AMPLIFIER AND POWER SUPPLY pe BOARD (NAPS·2875·2A)
CIRCUIT NO. PART NO. Trans istors Q501, Q60 1 22 11 371 0 r 22 113 72 05 0 2, Q60 2 221 17 32 0 r 2211 733 Q50 3, Q603 2211 35 3 0 r 22 1135 4 Q504,0604 22116 33 0r 2211634 0 50 5, Q60 5 22 112 55 22 126 5 3 0r 0 506 , Q606 22 126 54 22 1164 3 0r Q507 , Q607 22 11644 0508, 0608·~ 2201 78 3, 22017 84 0 r 220 1786 Q509 , 0609 o: 220 1773, 2201774 0r 22 0 177 6 DESCRIPTION 2SC225 9( 0 ·00 1) o r 2SC22 59 (0· 002) 2SCl 84 5(F ) o r 2SCI 84 5(E) 2SA949(0 ) o r 2SA949(Y) 2SC2229(0) or 2SC2229(Y) 2SC I8 15(GR) 2SC34 2 1(0) or 2SC342 1(Y) 2SA965( 0 ) o r 2SA 96 5 (Y) 2S08 54(O), 2SC38S 4( Y) or 2SC38 54( P) 2SA 149 0( 0), 2SA I49 0(Y) or 2SA 1490( P) Q805 Q807 , Q903 Q90 4 Q902 , Q905 22117 93 22 11 256 22 11255, 22 10746 0 r 221 2485 22 0 1754, 2 201755 , 22014 04 0r 2201 405 Diod es 223 163 40 00068 22316 3 223897 0r 223 80003 2239651 0 r 2243 24 1 223 86 2 0r 223890 2238960r 223880 223 163 223 9631 or 224323 1 22 394930r 22 43 16 3 Capacitors 354780229 35472 1019 3547222 19 354790 479 35472 2219 354 780109 354 744 709 3500065 A 350 4207 35476 1019 3912422 17 2SA992( E) 2SC18 15( BL) 2SC I8 15(G R), 2SC945 A(P) or JC50 1(Q) 2S0 19 13( R), 2S0 19 13(S), 2S0 1406 (Y) o r 2S0 1406 (GR ) ISSI B VOI222 ISS 133 P300 0L o r I N5402F R 0 1.3EB l o r MTZ 1.3 A WLOl o r WOI RL 1 N400 3 F o r GP10 1N4003 I SS133 RO l2E BI or MTZ1 2 A R06 .2 EB3 0r MTZ6 .2C 2.21lF, 50 V, Elect , 100ll F, 6.3V, Elect . 2201lF, 6. 3V , Eleet. 4.71lF, 100V , Elect . 22 01lF, 6.3 V, Elect, IIlF, 50V. Elect . 471lF, 16 V. Elcct . O.OI Il F, AC400V/l 25V , IS 6800ll F, 50 V, Elee t. 100 ll F, 35V, E1eet. 22 01lF, 16 V, Eleet.
050 1,0502 05 0 3,060 3 0802 090 1·0904 0905 , 0906 0907 0908 0 909 0910 0911
CAUT IO N:
Replacc me nt for tra nsisto r o f rnark c if neeessar y, mus t be made fro m the sam e bct a gro up ( HFE) as thc or iginal typ e.
Ex . 2SC385 4( 0)
2SA 149 0f O)
T
0551·0 553 065 1 0554, 0 804 2211732 0r 22 117 33 221 1792 or
T
Sam e bet a group 2SC I 84 5( 1') or 2SCl 845 ( [ ) 2SA992 ( I:) or
C50 l ,C60 1 CS 13, C6 13 C515 C5 16,C5 17 C55 2 (' 5 5 3 C80 6 C90 1 C904,('905 C906, ("907 C908 , C90 9
PRINTED CIRCUIT BOARD VIEW FROM BOTTOM S
ACI IGI ACllDl E
00000
gl s
o
W
~
-"r-~5e8
0 N C CD
o
0 CD
w
0
...
C908
CD~'"~ ~~ c~ R903 ~ ~~~"D
0 _~ 1
R902
., o '"
, ,
L I
·L f
n ce
I
fL
L
~.
I
"'.
CD
W
o
n
~ ce
,~
JJ
.",
1 ---
f:';
,0
'" '"J556 '"
~'" *.
I I
... '" ""
I
J 57 .
n
CD CD
J545 J 544
~ 43 J5
0905
Jl l l l
R8 "' "' s 8 6! ''' 0 3 ° _ 0
L
CD
' '''
E
CD
--l I
3'cr 8 ? -"
Q509
E
NOTE : THE COMPONENTS lDENT IF IEO BY MARK .6 ARE CRIT ICAL FOR RISK O F FI R E ANO ELECTRI C SHOCK . REPLACE ONL Y WlTH PART NUMBER SPECIFI EO.
Q903 Q902 B
B
POWER AMPLI FIER AND POWER SUPPLY
- 21
TX-7430
C91 1
C9 12
C914 C9 15 C9 16 C918 C919 C92 0 C92 1
35475 222 9 3547 4 10 19 3547 44 70 9 354 744 719 354 76 1019 3547 4 331 9 35 4 72 47 19 3547 6220 9 35 476 10 19
2200 1lF, 25V, ElceL 100 1lF, 16V, Elect . 4 71lF , 16V , EleeL 4 701lF, 16V, Elect. 100ll F, 35 V, Eleet. 330llF, 16V, E!eet . 470llF , 6.3V, Eleet. 221lF, 35V , Eleet. 10011 F, 35 V, Ele ct .
R50 7, R60 7 R510 , R61 0 R511 , R611 R512 , R61 2 R51 3,R61 3 R516 , R61 6 R521 R902-R905 R908 R91 2 R914 S90 1 RL801 RL 90 2 P1l6 P352
Resistars 52 10064 442 522714 44 1620 104 4000063 400 006 3 44 25 20824 4425201 04 441 6 23914 4416 204 74 441 721 804 442 522204 Switch 250353 98 Relays 25 065 1 34 25 065298 Socket 25 050 270 Plug 25055 133
N06HR1 0KB D, Serni-Iixed 27 0o hm, 1/ 2W, Metal oxide film l ohm, 1W, Me tal oxi de film 0.4 7o h m, 2W, Meta! plate 0.4 7o hm, 2W, Meta! plat e 8.2o hm, 1/ 2W, Me tal oxi de film lo hm, 1/2W, Meta! o xide film 390oh m, 1W, Met al ox ide film 4 .7ohm , 1W, Meta! ox ide film l So hrn , 2W, Metal ox ide film 22o h m, 1/ 2W, Met al ox ide film NPS-1 11-L36 2P, Power NRL-2P5A-DC 24-0 7
NRL-1PI A-DC12-40
NSCT·6P9 8 NPLG· 3Pl1 7
8
5901
~~
AC-H
POWER 5901
C901
I
C902 AC3 E AC210l AC2lGl
Fuseholders F90 2a·F906a 25 0500 65
~ YSH403 T
o
PTlO)
51<'
8888888
-JS02-
F902 F90 3, F9 04 F905. F906
Fuses 25 207 4 25 2078 25 20 70
~ 2 A-SE-EAK, Primary
~ 5A-SE·E AK, Second ary ~ 1 A-SE-EA K, Seco nda ry
8
- ---8 8 ..
RL901 AC J 503 SWIOI
5WlGl
PTIGI
8 [
lE
J5 86
ID~~r
J 58 7 J585
- '-Jsä4-
·- ~ [~.3-
RL801
.,
-( >!.5 ..?l
0
R61 1
UI
UI
N
110
J523
C
m
J527
E C E
Q609
BOARD
-22
PRINTED CIRCUIT BOARD VIEW FROM SOTTOM SIDE
PRINTED CIRCUIT BOARD - PARTS LIST
FM/AM TUNER
rc BOARD(NAAR-2869-2A)
DESCRIPTION
CIRCUIT NO. PA R T NO .
Fr o nt end
T U001 Q103 0 201 0301 , Q401 Q302 Q303 Q304 , Q404
REC
240072
ICs
TFFG3E 111 X LA1266 /lPCl161 C3 NJ M45590-X LC78 18 LC4966 NJ M45580 0 r NJM45580X LM6405G-2077 /lPA81C 2SC l923( R) or 2SC l923(O) 2S K108( 0) or 2SK68( M) 2SC 1815(G R)
Q801 Q802 Q10 1,0 102 Q104
222 40039 22 2678 22 2534 22299 6 222 40025 222 465 or 222 502 22240024 222807
Tr ansistors
~- I
~O P
PLA Y
Q105 ,Q l 13
221 1722 0r 22 11723 221229 40r 22 11293 22 11255
JI
PLA)' P302
,
,N ,g
e;
I
I
T-'
RE C
co
PH
P301
J 05
TUOOI J I 04
J I 02
JI03 -l.
lUO OI
- 25
TX·7430
Transformers
QI 08-Q 112 Q114-Q 11 7 Q202, Q332 Q203 Q206, Q331 Q333, Q806 Q207. Q208
Q305 , Q405 Q80 3, Q81 1
221 125 5, 22 107460r 22 12485 22 119 45 or 22 12304 2211455 , 22 12495 or 22108 03 2211705 , 22 11706 or 22 12 794 22 122850r 221 228 6 2211255 , 22 107 460r 22 12485
Diod es
2SC I8 15( GR), 2SC9 45 A(P) or JC5 01 (Q) 2SK246(G R) or 2SK38 1(0) 2SAI0 15( GR), J AI 0l (Q) or 2SA73 3(P) 2S D655( E) , 2S 0655(F) or 2SDI 468( R) 2SC2878(A) or 2SC28 78( B) 2SCI8 15(G R) . 2SC945 A(P) or JC5 0l(Q) lK6 0 R0 3.3 EBI I SS1 33 IS S133 I SS1 33 IS S133
LlOI Ll0 2 Ll 0 3 Ll04
233 37 4 23 3375
Coils
NF IF-4060 NFI F-40 61 NCH-I 005 NMC-9-1 or NCH·2 129 NMC-602 7 NMC·40 59 NMR F-7045 SFE I0 .7 MM SFL 450 B3 BFU450C CSA4 .00 MG 100/-L F, 16V, Eleet.
I /-L F, 50 V, Elect. 0.22/-LF . 50 V, Eleel. 3.3/-LF, 50V, Eleet. 10/-LF. 16V, EleeL
UOl L202, L203
Ll51 XI0I-XI 0 3 X151 X152 X801 C I08 C110 C112 C115 C116 C11 7 C118. C120 C12 1 C123 C12 4 C128 C129 C l3 1 C1 34 C135-C137 C202 C20 3 C20 7.C208 C210
233 105 23 3031 0r 23 1081 23323 6 23 3 355A
RF block
232 13 5
Ceramic filters
30 100 43 30 100 75 301 0 07 6 3010 099
Capacitors
0 101. 0 102 0103 01 04-0 114 020 1-0 204 080 1 08 03-0806
22 313 2 22 4129 1 223 163 22 3 163 223 163 22316 3
o
C2ll
C212 C213 C215 C216 C220, C22 1 C222 , C803 C80 7 C81 5, C816 C30 2,C402 C305,C 405 C308, C408 C309 ,C3 10 C316 , C3 17 C341 C34 2 , C343 C416, C417 RI 0l RI 02 R15 1 R201 R202 R34 5-R 349 R802-R 809 POOl P30 1-P303 S301
354741 01 9 35478 0 109 354782299 354780339 35 47 4 1009 354 780 479 35474 1009 354780 339 3547 84 79 9 3547422 09 354780 479 35478 22 99 35478 4799 3547 8022 9 354741009 354742209 354744 719 35 4741009 3547 8229 9 35 4780339 354 78 010 9 3701347 14 3547804 79 35 47447 19 354780229 35474 100 9 354780339 3547802 29 354780 229 35472 10 19 354 78 022 9 39 12422 17 35478 022 9 35478 1099 35 4780339 3547 8022 9
Resistors
4.7/-L F, 50V, Eleel.
10/l 1:. 16 V, Eleel.
3.3/lF , 50V . Elee l.
004 7/-L F, 50 V, Eleet.
22/lF , 16 V, Eleel.
4.7/l F, 50V , Eleet.
0. 22/-L F, 50V , Elee t.
OA 7/lF . 50 V, Eleel.
2.2/lF , 50 V, Elect.
I O/l F, 16V, Elee l.
22/lF, 16 V, Eleet.
470/-L F, 16V , Eleet.
10/-L F, 16V, Eleet.
0.22/l F, 50 V, Eleel.
3.3/lF , 50 V, Eleel.
I /l F, 50 V, Eleel.
470p F ±5%, 1OOV, APS
4 .7/l F, 50V , Eleet.
470/l F, 16 V, Eleet.
2.2/lF . 50V, Eleet.
10/lF , 16 V. Eleel.
3.3/l F, 50V, Eleel.
2.2/lF, 50V, Eleet.
2.2/lF , 50 V, EIeet.
100/-L F. 6.3V , Eleel.
2.2/lF . 50 V, EIeet.
220 /lF , 16V, Elect.
2.2/lF, 50 V. Eleet.
O.I /lF . 5 0V , Eleel.
3.3/lF, 50V, Eleel.
2.2/lF . 50 V, Ekel.
N06 HR47K BO, Semi-fixed N06HR I00KBD, Semi-fixed N06 HR I 0 KBO, Serni-Iixed N06HR4 .7K BO, Serni-fixed N06HR 220KBDM, Semi-fixed 10kohm X5, 1/10W, Netw or k 10kohmX8 , 1/1 0W. Netw ork NTM-2 POMN31 , Antenn a NPJ-6 POBL60
52 10068 52100 70 52 10064 52100 6 2 52 100 72 4916 31 034 05 491631 034 08
Terminals
2506008 7 250451 66
Sw itch
m
250 6528 6
NPS-22 112, Mode, VCR-2
FM/AM TUNER pe BOARD
-26
( Co nt i nu ed on pa ge 29 )
PRINTED CIRCUIT BOARD VIEW FROM BOTTOM SIDE
25 1326 70 NCO/5-2670
V CRI
VCR2
7-1
7-2
G
5722 R76 /
~~
,. -,
G
5 723 0 736
J
D , I
~, -' 1
,lil
N f _. a:
CD ...
0 I,
CD ...
a:
J600
DISPLAY
rc BOARD
0 740-074 7 0720 0 72 2-0724 0 730 0733-073 7 0 72 6-072 9 0 7 38 ,07 39 C70 1 0 04 C70 6 C71 4 0 15 0 16, C7 17 0 18, 0 19 ('720 C721 ·('729 C73 0-C73 5 C736. C737 X70 1 R70 5-R7 17 R7 18-R724 R725- R728 S70 1-S7I5 S7 18-S724 223 163 L.E .Ds 225 14 1 225137CG, 225 137 0G o r 2 24 13 70Y 225 142 225 142 Capacitors 3547233 19 35478 4799 3537210 19 3020027 or 3000050 354 782209 354780 109 35472 1019 354 74 1009 30 2003 1 302 00 30 35 47 4 1019 X'ta l 30 10091 Resistors 49 L6 322341 3 4 9 163 1044 0 7 49 16 3104404 Switch es 2503554 8 250355 48
PI OI , PI 0 2 Pll1 PI 12
Sockets 20006 57 25050270 25050268
NSAS- L OP6 13 NSCT-6P 98 NSCT-4 P96
I SSI 33 SEL22 13C SEL2 4 13CG, SE L24 130 G or SEL24130Y SEL2913 K SEL2913 K 330 ).L F, 6.3V, Eleet. 0.4 7).L F, 50 V, Fleet. 100).L F, 6.3V, Llect . 0.04 7F , 5 V o r 0.047 F, 5.5 V, Sup er 22).L f , 50 V, Elee!. I).L F, 50V, Elect . 100).L F, 6.3 V, Elect . 10).LF , 16V , Eleet. CN3 RAE331 M, Block CN3 R7E33 1M, Block 100).L F, 16 V, Elee t. XTL-4.5 M 22 kohmX 13, I/lO W, Network 100ko h m X7, I/lO W, Notw erk 100 koh mX4 , I /I OW, Ne two rk NPS-I I I-S5 10 NPS-III -S51O
DISPLAY pe BOARD(NADIS-2870·2A) CIRCUIT NO. PART NO. DESCRIPTION
U002 Q70 1 Q702 Q70 4 0705 0 706 , Q707 Q703 , Q7 17 0720 Q7 12, 0 7 1 3 Q7 14-07 16 Q7 19 Opto. modul e 24 1068 ICs 222 6 19 22240026 222 80 1 2227 4 145 1 22280 1 Transistors 2211 255 , 22107460 r 2212485 22 12600 22 11256 22 11705 , 22 117060r 22 12794 BX-1407 ).LPß 55 J/\ C ).LP0 17 11ClJ-524
~( PAROC
74LS I45 ).L PA80C 2SCl 815 (G R), 2SC945A ( P) or JC50 I (0) OTi\l 24 FS 2SCl8 15( IlL) 2SD655(E), 2S 065 5 (I:) o r 2S01 468( R)
Q72 1 PU OI 0 701 -07 05 0706 0 70 7-07 19
Fluorescent tube 21203 7 8-BT-49G K Lamp 2 10064A Diod es 22 3 163 2239472 or 22 43152 223 163 6.3 V, 0.25/\ I SS I 33 R05 .6 EB2 0 r MTZ5 .6ß I SS I 33
- 29
TX·7430
L r -
co
5 7 18
'"
L W
w o
"L-=-
Ö
0733
W
L
1 7 75
~
9
5706
AM ~
"'4 \"' 12
@J
5 7 11
PREAMPLIFIER pe BOARD
Holders 27 1905 18 27 1905 19
Cush lon
APR Selector 10X 40X 3.5
R355 , R4 55 R35 9, R4 59 R3 91
Resisto rs 5 10 4202 510 4202 510420 1 Switch es 25035556 Sockets 200 0590 250502 70
28 140 538
PREAMPLIFIER
r-c BOARD(NAAF-2871-2A)
DESCRIPTION NJM4560D or NJM4560DX NJM4558D or NJM4 558DX 2SC2 878(A) or 2SC287 8( B) 2SAI015(GR) , 2S A7 33( P) or JA I0l(Q)
2.2Il F, 50V , Eleet.
NI2RGLC50KC25Z, Variab le, Bass NI2RGLC50KC25Z, Vari able, Tre ble NI2 R LC250K W25Z , Variable, Balan ce NPS-222-L51 8 NSAS-6P546 NSCT·6P98
CIRCUIT NO. PART NO. Q351, Q451 Q352 , Q355 ICs 2225790 r 2225 70 22 24650r 222 502 Trans istors 22 122 850r 2212286 22 11455, 22 10803 or 22 12495 Capac itors 35478 0 229 35 474 1009 35 2983 396 35 4741009 3547 81099 35 4781099 354 74 100 9 35 4 780229 35478 03 39 35 47 410 09
S3 51, S352 P352 P353
Q353, Q35 4 Q45 3,Q454 Q808, Q809
C351, C451
C352,C4 52
C354,C4 54 C357,C4 5 7 C358,C45 8 C359,C459 C363 C366 C37 3, C374 C808
1011 1:, 16 V, Eleet. 0. 33111', 50V, Non-po lar elect. 101lF, 16 V, Eleet. O.IIlF, 50 V, Elee t. O.I Il F, 50V, Flee t. 101lF, 16V . Eleet. 2.2Il F, 50V , lle ct. 3. 311 F, 50V, Eleet. 101lF, 16 V, Eleet.
-30
T X·7
PRINTED CIRCUIT BOARD VIEW FROM BOTTOM SIDE
P251 C255 A26 1 A252 E
." N
A259 E 02 54 A25B B
A263
256
~
A260
E
B A25 7 E B
A255 025 3 A256 CZ52 A253 E B n C253 0252 N UI 0255 A254 .... 14
B
A262
A251 C254 1
A273 , <..
C2S1 C256
." m."
G
A27 1 I ~ A27Z ')' - 02 7 1
0272
,m
0
C%
w
.,, ;;:
m
U
PARTS LIST
SWITCH PC BOARD
~ '"
."
REMOTE CONTROL TERMINAL PC BOARD
PRINTED CIRCUIT BOARD
REMOTE CONTROL TERMINAL PC BOARD (NAETC-2878-2)
CIRCUIT NO. PART NO. DESCRIPTION
SWITCH PC BOARD(NAAF-2879-2)
CIRCUIT NO. PART NO. DESCRIPTION
R386 , R486 S354
6 182003 250 35 557
JC
0251 Q25 2
2228 4066 1
T ransistors
4 0 66 B 2SA I OI5(G R), 2 SA733( P) o r JAI OI ( Q) 2 SC I8 15(G R) , 2SC9 45 A(P) or J C50 1(Q) IS S I 3 3 10J.l F, 16V , Eleet. 4 70J.l F, 6.3 V, Elcc t. 10J.l I' , 16V, Eleet. NPJ-4POBL94 NSCT-8P I 2 1 NSCT-4P96 NSCT-8PI OO S-G85 15
N2 5 LG LlOOK ROI0Z , Var iab le resist or NPS-14 2-L5 19, Push switeh
0253-Q2 56
22 11455, 22 108 030 r 22 124 95 22 11 255 , 22 10 7460 r 22 12485
Diodes
0 271 ,0272 C25 1-C253 C25 4, C2 55 C256 P25 1 P801 P I 04 PI05 P80 2
223 163
Capacitors
35 47 4 1009 35472 47 19 3547 4 1009
T erm ina l
250 452 16
Sockets
25 05 0 294 2505 02 68 25050272
Jack
25045 2 15
-31
TX-7430
P502 P502
SPEAKER TERMINAL PC BOARD
SPEAKER SWITCH PC BOARD
VOLUME PC BOARD(NAAF·2872·1)
CIRCUIT NO. Q8 10 C809 , C8 17 C818 R 35 1, R4 51 PART NO . 222963 354 7803 39 3547803 39 5 104200 DESCRIPTION L B1630 , 1C 3.3,uF, 50 V, Eke l. capa c itc rs 3 .3,uF , 50V , E lecl. capac ito r N 16 RGM50 K A30F, Variab le rcs ist or , Vol u me NSAS-4P5 91, So ck e t
o
~0 ~
N
P3 5 1
20 00 635
VOLUME INDICATOR PC BOARD(NADIS-2874·1)
CIRCUIT NO. PART NO . D81 0 2 252 19 2 72 701 03A DESCRIPTION S LC-2 2U R4!'", L. E.D Sp ace r
SPEAKER SWITCH PC BOARD(NASW·2876-1A)
CIRCUIT NO. PART NO. L50 1, L601 231 001 R51 7, R61 7 44 2 5 204 74 DESCRIPTION S-1.3 B , Co ils 4. 7o h m , 1/2W, Me tal o xid c fi lm res isto rs 39 0 o h m, 1W, Metal o x ide fi lm re sist ors NPS-222-L47 9, Pu sh switch HLJ -0 540- 0 1-0 1O, Ste reo headph one t er mi nal
VOLUME PC BOARD
R51 8, R61 8 S50 2 , S50 3 P502
441 62 3914 250 35 51 7 2504 51 39
SPEAKER TERMINAL PC BOARD(NASW·2877-1A)
CIRCUIT NO. PART NO . P501 25 060 093 DESCRIPTION NTM·8PDM L34 , Spc ak e r te rm ina l
-32
DISASSEMBLING PROCEDURES
1. To p cover
Rem ove a sc re w h o ldi ng th e top co ve r and th e ba ck pa nel.
Rem ove th e fo ur scrcws holdin g th e ba ck pane l and the cha ssis.
2. Fron t pan el
Remove the top cover.
Rem ove th e six sc rews ho ld ing th e fron t pa ne l an d the f ro n t bracket.
3 . Bot to m boa rd (C hassis)
Rem ove th e to p cove r a n d th e fro n t panel.
Rernove th e five screws A holding the ba ck pa ne l arid th e chass is. (See Fig. 1)
Rernove the four scr ew s ß an d the two sc rews C. (See Fig . 2)
Rerno ve th e t wo scr ews 0 hol di ng the cha ssis and the front b rack et. (See Fig. 2)
Rernove th e t hree sc rew s E on th e AM/FM tun er pc bo ard , (See Fig . 3)
4. F ro n t br acket
Rem o ve th e bot tom b oard (Ch assis) .
Rernove th e br acket between the front bra cket and the radiator.
Rernove th e two screws F . (S ee Fig. 2)
@ I
@
o"b 0°0 OflP 0 O,p 0 o,p 0 I@
0000 0 0000
@ @
V
0
~
( F ig. 1)
\j
C=:=)O
@
/
r
C
@
FR ONT END
>
.>
@
0
®
0
0
( Fig. 3) ( F ig. 2) - 33
TX-7430
ONKYO CORPORATION
Internationa l Division: No 24 Mori Bldg ., 23-5, Nishi-Sh imbash i 3-chome, Minato-ku, TOKYO 105, JAPAN Tel: 03-432-6987 Fax: 03-4 36-6979 TLX 242-355 1 ONKYO J
ONKYO DEUTSCHLAND GmbH ELECTRONICS
Industriestrasse 18,8034 Germe ring, WEST GERMANY Telex: 41-521726 ONKY . Te l. 089-84-9320
P N OM 3 258 - 34 A 7 03 Printed in Japan
FM section
It em Step Co nnec rio n of instrurn ent Fig. I FM SG ou tput Stereo modulator o utp ut
Tumin g dial setting
Ou tpu t indicat or
Adju stment
Adju s
I FM IF 2
Fig . I
99 . I MHz I kHz , 75k Hz d evi . 65dBf (60 d B)
L+ R: 1kHz 6 7.5 kH z devi,
99 . I MHz
DC voltrneter
Ll OI
OV
99 .I MHz
I
Dist or tion a nalyzer
Ll02
I
Mini mun
I Ste reo level
f---
99 .I MHz 17.2 d Bf (l2 d B) Ext. modulation Fig. ; 99 .1MH z 16 .2dBf ( 11 dB ) Ex t. modulation 99.lMHz 1kHz, 75kHz devi . 65dBf (60 d B)
99.1MHz
65dBf (6 0 d B) Ext. modulation
99. IMHz 65dB f (6 0 d B) Ext. modulation 99 .l MHz 35 .2dBf (30 d B) 1 kHz, 75k Hz devi ,
Ligh t on 99 . IMHz Stereo indica to r R I OI Ligh t off
2
Pilot sign al : 19k Hz 7.5k Hz devi.
VCO
Fi g.2
-
99 .1MHz
Frequency counter
R2 0 1
19kHz!
Stereo Distortion I
f---
Fig. 3
L or Reh. 1 kHz
99 .IMHz
Distortion an al yzer
IF on front end
Minimu rr
Stereo Separation
Lch . 1kHz 99 .IMHz Reh . 1kHz
Reh . AC volt me ter R20 2 Lch . AC voltrne ter
Minimu rr Minimurr
Fig . 3
2
Hi-blend level
Fig.3
-
99.1MHz
Hi-blend ind icator
RI 0 2
Light off
AM sectio n
Step AM SG
ou tpu t
T uned fre qu ency 5 22kHz
Ou tput indica tor Digital DC voltrne ter Digital DC votmeter AC vo ltmeter
Adj ust me nt point OSC o n RF blo ck
Adju st for
Remarks
Re fer ence spec if Tun ed voltage E
1C
Au to sto p level , i
I
I.4V ! 0 .1 V
2
1611kHz 603kHz 400Hz 30 % mod . 60 3kHz 60dB/m 14 04kHz 40 0Hz 3 0% mod . 140 4 k Hz 60dB/m 99 9 kH z 400 Hz 30 % mod. 999k Hz 6 0dB/ m Same as above 999 k Hz
8.0 ± 1.0V
3
RF on RF block
Maximum Repeat the steps 3 and 4 until no fu rt her adjustment is necessary . Maximum
I
4
AC vo ltrn e ter
TC o n RF block
5
AC vol t rnet er F irst signa l indica tor
I
XI51
I
Maximum
I
RI 5l Light o n
OUTPUT
6
UNIT
AM
I
AC
I VOl D IETER
i
i
l OO P
A;s: T
- 19
TX ·7430
Rernarks
OUTPUT
l
Muring swi tch : o ff Repeat the st eps 1 and 2 u ntil no
further adjus t me n t
is necessar y
nl
SIGNA L G ~ N ER ATOR
r - ....
}-_-.--_..;--------,L.-.--.- DISTOR~
i ANALYl ER
- - 'L-,_ _
TE R ~t1NAL
-,-.J
1
Fig, I
ANT
TE R ~t1SAL
-
Muting sw itc h: on
Fi ~ 2
EXT. " lO D E
, --
-
- -
-,
[I
1Hz
, ~~~\~,(\ TO Rj--i'--"L I '
A NT TE RMINA L
Fi~
-;: M-;----'I~-_.--! f:;:
OUTPUT L UN IT
TI
~ D IS , OR T IO ~
~" "''' I .
3
AC L n IIT E R VO
! I i O SCI L LOSCOPEI l ~
1
Maximu ~ same m and icn I
separat
atio ns 5MHz 2.0 OMHz 7.7
:!: :!:
0.5V 0.5V
o
TP -7 [J
T P-6
E [J
L Less than 66dB/m 1: Less than 20d BI-'
RF BL OC K
L-
---'---'
X l~ l
LIO I
@J ~
L10 Z
rJ
0 T P2
T~ 'OO
Rl O2
R l~l
0
RIO I
o
o
E
RZOI
RZ O Z
o
TP'
[J
...
-20