ONKYO TX7430 SERVICE MANUAL

SER

IAL

TX·7430

NO. 32 58

ONKYO

,

~

,

SERVICE MANUAL

aUARTZ

SYNTHESIZED

TUNER AMPLIFIER

MODEL TX-7430

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFI ED BY MARK

AM

SCHEMATIC DIAGR
CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.

REPLACE THESE COMPONENTS WITH ONKYO PARTS
WHOSE PARTS NUMBERS APPEAR AS SHOWN IN THIS
MANUAL.

MAKE LEAKAGE-CURR ENT OR RESISTANCE MEA­SUREMENTS TO DETERMINE THAT EXPOSED PARTS

ARE ACCEPTABLY INSULATED FROM TH E SUPPLY

CIRCUIT BEFORE RETURNING THE APPLIANCE TO
TH E CUSTOMER.

AND IN THE PARTS LIST ARE

L.

ON THE

TABLE OF CONTENTS

Specification s 2
Service procedures 3

Exploded view _. . . . . . . . . . . . . . 4

Parts list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5

Circuit descriptions 6
Block diagram - Amp. section

- Tuner section ­Block diagram
Packing view

Adjustment procedures __ .

Pc bca rd view/parts list

Power amp. . . . . . . . . . . . . . . . . . . . . . . . . .

FM

/AM tun er 25

Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29

Preamp. . _. . . . . . . . . 30

Remot e cuntrol . . . . . . . . . . . . . . . . . . . . . . . . 31

Switch

Spea ke r 32

Volume 32

Schematic diagram

Amp. section " 23

Tuner section 27

Disassembling prccedu res 33

of

IC 14

..

. . . . . . . . . . . . . . . . . . . . . . . .

- . . . . . . . . . . . . . . . 12

.,

. . . . . . . . . .

..

..
..

..

13

17
18

21

3 1

ON

AUDIO

KYO

COMPONfNTS

®

- 1-

SPECIFICATIONS

AMPLlr-IER
Power

Musi c ~1

Continuous

Total

ll arm o ni c Dis tor tio n:

IM

Distort

D~rllping

FroClu8
RIAA

Ouvia tio n:

Se

ns iti vit v

Pho

no

Signal-lo-Noisu

Tone

COIlIIOls:

MUl

ing:

Output

Power

Power

ioll

:

Factor:

11

CY

Responso:

aud

Ovet lo ad :

SECTION

:

Output

:

Outp

lmp

cd a n co :

Ratio:

45
channels
than
2

x

2 x 78
2 x 70

ut:

2 x 55

0.08% at rated

0.08% at 1
0

.08

0.08 % at 1
35 at 8
20 - 30
20 ­Phono
CD/Tape
Tape Rec:
120mV
Phono: 85dB

CD/Tape:

Bass: ±
Treble:

-20dB

watts

per

driven

0.08% TH D.

126

watts

watts
watts
watts

watt

% at

rate

watt

ohms

.000

20.000
:

Play:

150mV/3

RMS

channel,

. from

at 4

ohrns.

at 8 ohms,
at 4

ohms,

at 8

ohrns,

power

outpur

d

power

ouput

Hz ± 1

dB

Hz ± 0

.8dB

2.5mV/50
150mV/50

.5

at 'l kHz,

(at

10rnV

75dB
95dB
80dB

±10dBatl0kHz

min.
20Hz

1kHz
1kHz
1kHz
1kHz

kohms

0.08%

input

10dB

RMS.

to

20kHz.

(DIN)
(DIN)
(DIN)

(DIN)

kohms

kohms

(phono)

THD

, A

(IHF

A-202)

(A

weighted)

(IHF

at

100Hz

at 8 ohrns,

w ith no

weighted)

A-202)

both

more

TUNER
FM
Tuning
Usabio

50cJO

Captut e Ralio:
Imago Hei
Ir: Rojocli
Signal

Selecti vity

AM

ll arruo

Fro

St oreo Separ arion:

AM:

Tuning

Usable

Image Rejo

IF Rejeclion

Signal
Harm onie

GENERAL

Dimensions

SECTION

:

Rango :

Sunsiti

Ouio rinp

ectiou

oll

-lo

-Noiso Rati o:

Suppression

nic

DIslortion

quuncv

Rosp

Rango :

Sensitivitv:

clion

-Io-Noise
Otstoulou:

vitv:

Snnsitivitv

R~lio:

onso

Ralio

(W

Weight:

Ratio:

Ratio:

:

:

Hario:

:

Ratio :

x H x

87 .5 - 108
Mono

Stereo: 18

:

Mono:
Stereo:
1

.5dB
85dB
90dB
Mono
Stereo:
50dB
50dB
Mono
Stereo: 0.30%

30 ­45dB
30dB

522

30~V

<lOdB
40dB
40dB

0.7%

D):

.0MHz

:

:

DIN

(±300kHz. 40kHz

:

15.000Hz ± 1.5dB
at 1kHz
at

100

- 10

- 1611 kHz

435

x 11 0 x

17

-1/S"x <1

7.5 kg .. 16 .5 Ibs.

(50kHz

12.8dBf.
1
75

23~V(S/N

75
18

37.2dBf

72dB
66dB

0.15

.000Hz

(9kHz

-3/S

.0\lV

ohms

.0dBf.

ohms

.0dBt.

%

steps)

3<15

steps)

(S/N

.

m[n

"x

13-1/r

1.2~V.

26d

DIN

2

.2~V.

46dB.

DIN

2.2~V.

20~V.

dev.)

75

ohms

B.

40kH z Devi

75

ohms

40kHz

75

ohms

75

ohms

.)

Devi .)

Spec

llicatiorts arid Ieatures are

subject

to

chanqe

without

-2-

notice.

TX·7430

Remote

Tr

ansmiu

ign

S

Power

Dim ensrions (W x H x

Control

er:

nl range:

supply:

transmitter

0)

:

RC

-82S

Inlrar

ed

Appr

o x. 5

Two

"AA"

64 x 18 x

meters

baueries

149
2-1/2" x 11/16" x 5-7/8
110

Weight

:

grams 3.9 oz.

SERVICE PROCEDURES

1. R

eplacing

f or co nt

0111\' w ith saure tvp e

Circu it no.

f9

02

f903

, P9 04

P905

2 .

Change

This mo de l is not loca red Ihe band sclcc to r sw ilch.

If th e PM b
died es
If th e AM
(lS

S133)

3.

Memory

Th

is un it
A hu ilt-in me
01 th e m
unit

is unplugged. The unit
power sw itch t
ba ck

-up
mem ory ,the pow
times

each mont

The per

prese rved

d

cpen

din g on
On the
peri od of 3 10 4
the last tim e pow
shor l

er

used

in an a rca

the

fuses

inucd

prrn

cc tion ;);:;Ullst lir c ha za rd.re plnce

and

s.uuc

rat

ing (use.

Part

no. Des

25207

5
252078
252070

of

FM/AM

and

(lSS133)to07

step is eha nged from

band

stcp is chungcd from

10

0711

preservati

does 1I0t req uir e m

mory power

emory

system. No te rhnt since t h is is not a

iod of ti me

after

climate and

average,

whe n

the

band

09 and

on

the displuy PC board.

on

durin

g p

urn

ed Oll and

er

switch rnust be

h 10

keep

dur

ing

pow

er

has

mem ory conten ts are p ro tec ted

wee

ks (a mi

er

ha s been

un it is ex

with

an ex tremely

cripti

2.5A-SE
5A-SE-EAK,

lA-SE-EAK

step.

50k

0710

on the display PC boar d.

9kH

emor

y pr

bac

k- up sy stem prese

ower lailur

rnust

he pl

oll

on ce in o rde r to

the ba ck

whic

h mem ory co

la st

been

placement

nimu

m of 2

turncd

pos

cd to ve ry high

on

-EAK, Pri

Hz 10 200k Hz, rcm ovc rwo

z to 1

eserva

es

and

turn

-u

p systern o pe ra

turned off va r ies

of th e

off. T his pe

humid

mary

Sec

ondary

, Scc

ondary

0kHz,

tion baucries .

eve

ugge

d in

ed

00

nte

unit.

wee

clima te.

rves

n when t he

and

perma

and o ff a few

nts ar e

over

ks) af ter

hum

mm

rernov

char

riod

idit y o r

(1

6ft.

(l

.5V x 2 )

(in

clutl

e

01

diodc

co n ten ts

the

ge th e

nent

tive

.

a

is

4")

"

ing

uaueri

es)

o I I 0
o ,

o

Pli

.

0 11 0

0'

o vc r

-4-

><

w

a.

--I

o

C

W

C

>

-

W

;:

TX·1430

o

0 '

Q

PARTS LIST

REF.NO
Al
A2

A3

A4

A5
A6
A8
A9
A

I0

A l l

A12
A13
AI4 27 14 1123A
A15
A2 1 27

A22

A23 27
A3 1 28 18

A51 l AOO1121

A52
A61 27 175 13 0
A71 2832

A72 28

A73

A74 28

A75

A76

A77

BI 834

B2
B3 838 4
B4
B5
B6
B7
88
B9

BIO

.

PART NO.

27100

121 A

27

1209

43 A
27 130470
27 13046 8A

27

16020

1

27130

469

27

190

359
27273030C
28 133

176A

2

8130242A

27

300750

27141122

272702

16

110338
27110339
27

190525
27

190526
190

105

4356A

28

184357A

lA

OI0 12 1
28140

220

2796

283 227 95 A

322469
28322304 -1
28322

470

2832230

283
28322928
28322929
2832292
28322925
28322926A
28322927

83 1

834
82 1
8304
82 1
833430080
8800
830

322

92 2B

22923B

430068
1300

4008
4301
4300

40089
4200

11
440109

5-1

4

88

08
6

4

A
A

8
8

A

9

DESCRIPTION
Chassis
Back p anel
Bracket , shie lded
Bracket , rad iat or
Radiat or
Bracke

t, power tr ansforrner
Holder, dial plat e
Join t L
Back

platc

Dial plate

~

Strainrclicf

Bracket

F
Brack et R
Spacer
Fro nt bracket ass 'y < S>
Front br acket ass'y < B>
H

older,

slide r < S>
Hold er, slider < B>
H

old

er, ante nna
Top cove r <
Top cover < B>

Fr

ont

Fro nt panel ass'y < B>

pane

S>

l ass'y <

S>

Cushion

Leg
Knob,

Power < S>

Kno b, Power < B>

Knob,

Speaker A <

Knob

, Speakcr A <8'>
Kriob , Spcaker B <5>
Knoh, Speaker II
Knob, Volun••
Knob. Volume < B>
Knob, Ton e < S>

Kno b, T on e < B>
Knob, Slide <5>
Knob, Slide < B>
Knob , Push <S>
Knob , Push < B>

3T rS+6 B(BC),

3Tn \'+8f\, Tapping scrcw
4TTB"'SC(BC), Tap ping screw

31TS+I0B

3P+6 FN(B C) , Pan hcad screw
4TTC+8C(B C) ,
2P+4F(B C) , Pan

3TTP+

Rivet
4TT

(B(' ), Tapplug screw

8P(BC),

C+I 0C(BC),

5>

<B>

$'

Tappi

ng scrcw

Tapp

ing screw

hcad

screw

Tapping

Tapping screw

screw

PART

REF .NO.
Bll

F90 2
F90 3, 1"904
1"

905,

F906
P304
P901

Q508

, Q608

Q509,

Q609

Q902, Q905

T901
UI

NO.

870060
252074
252078
252070
250600

44
253 128B or
2531

30A
220 178 3,
2201 784 or
2

201786

220

1773,

220

1774 or

220

1776
2201 754,
220

1755
22014040
220
2300

I A0085 69 ·2A

,

r

1405

199

U2 I A00 8570·2A

IA

0085

71·

U3

U4

U5 1A01 3573-1

U6

U7

UR I A01 3576·1A

U9 I AO

UI0

Ull

NOTE :

I AO

l

A013574

lA0

I A008578·2

1A00 85 79-2

<B>:

Only Black mo del

<

S>:

Only Silver mo de l

2A

I3572

·1

·1

08575-2A

I3577

·1 A

DESCRIPTION

Flat washer

~

2A-SE- EAK, Fuse, prirnary

~

5A-SE-EAK , Fuse, secondary

~

1A-SE-EAK, Fuse , secon
Termin

al GND

~

AS-CEE, Power

2SC3854(0),
2SC3854(Y)
2SC3854(P)
2SAI490(0),
2SA

I490(Y

2S AI4

90(
2SD I9 13( R) ,
2SDI9

13(S),

2SDI

406(Y)

2S DI

406(G

.6.

NPT-955G, Power tran sform er
NAAR-2869-2 A, FM/AM
pc b

oard
NADlS-2870-2A
b

oard

ass'y

NAAF-2871-2A,

board

ass'y

NAAF-2872-1, Volum

ass'y

NAETC-2873-1 , V
pc board ass'y
NAD IS-287 4-1, Vol
pc

boa

rd ass' y
NAPS-2
and

power supp
NASW-2876-1A,
pc

boar

d ass'y

NAETC-2877 -1A,

pc bo ar d ass' y

NA

ETC-2878-2,
terminal pc
NAAF-2879-2,

or

) or

P)

R)

ass'y

875

-2A, Power

board

supply

or

, Display pc

Prearnplif'ier pc

olum

ume indicato

ly pc

boar

Speake

Speaker

Remote co ntro l

ass' y

Switch

ass'y

NO TE: THE

CO MPON
CR IT ICA L F
S

HOCK. REPLACE

SPECIFIED .

dary

cor d

tune

r

e pc boa rd

e rno to r

amplifi

er

d ass'y

r switc h

term ina l

pc

boa

rd

OR

r

ENTS

IDENTIF

RI SK O F FI R E AN D

ON LY W IT H P

IE D BY

MARK~

ELE

ART

AR

CTI C

NU MBE RS

E

CIRCUIT DESCRIPTIONS

1:

Remote

control

decoder

(LM6405G)

• 12V

Ta

INDIC fl TOR

r

---.-L!J

tun nr {

Ta v
ca n

VCR - 2
VCR - ,

c.p

P H

T- I

T - 2

Ta
Sw

~

alu

tra

itc

f----

me [

l lC

mut

e [

h

..

x.i o t
PCo

pc

,

PC]

IN

T

~ E S

PO o
po,
p o>
p o ,

PEo

(PLA

O )

I (P

LA'

PE
PE > (P LA 2 )
P E , ( PL fI , )

P F> ( PL fI
Ph (PLfl7)

TEST

Vss

o---E

)

.)

LM 64

05G

E X

V

oo(

PB'
PB
PB I

P Oo

P

A'

PA>
PA '

PAO

P

I2

Pl

PI O

PH,
PH,
PHI

PG ,
PG2
P

G,

PG o

.la

I

l

'5V)

- - f-- -

2 -

-I

--I

-

~---

-

~---

-~

-

-t-

-

-t---r-

..

-+-- - -

-

~---

,----- -

'------j

f---

- - -

---

- - - ..

-I

;>0

-j

)

-j

;,.0---

M

..

SP CTL

..

BACK UP

I N I T
STAND

-PHo

POWER CTL

PROTEC

-+---

t

- - -

- -

0--

- Ta CD t erm inal

AIN

OFF

BV

T

RE MOTE S

T- 2 ON IOFF

Ta casset te

t

erminal

ENSOR

!'ill No . Code

-- - - - - -

I

2

3 5

5
7

8

9

10

X't al Ccr.unic rcso ua to r

ST.

ur

1'.

D N

(NDI

RE

VO L.

VOL.

MUTIN

S

U!'

DN

--

G

----

Pr

oset

STATION

"L"durin

O ut put
l'r

esct S

TATION DOWN

Output"L"

T

erminal

Re

V

OLUME

Outputs

V

OLUM

OUlpUI " LU

MUTI
Switching of

Ior

set

termin

"L"

E D OWN signal ou tp ur t

NG O N/OFF

---

U!'

sigIlai o u tp ut

g pu

shin

g of rc mo tc co n tro l ST AT ION LiI'

sig na l

durin

g pu

shillg

o f rc
indic ntiug Ligh t recci v

al

U!'

signa l o u tpur tc

during

push

ing o f

durin

g pu

shing

o f

VOI.UMEDOWN

o Ul

pull

erlllinal

" L"

++"

H"

(ON

= "

ter

min

outpur termin

mote

co u tro l ST ATIO

ed

by rcmotccout

rmiu

al

VOLLiME

erm

inal

H")

by nieans o f

-6-

Descrlpti on

al

al

ur

KEY

KE Y

renr

KEY

N D O WN K

rol ;

during

ote

co n tro l A

EY

liglu

rec

cption,"L" is

UDI

O M

UTIN

G K

output

EY

TX-7430

Pin

No .

11

12

13

14

15

16

17

18

21 G ND
22
23 T -

Code

MUT-2

VCR-2

V

CR

-1

C D

PH

T U

1'

-1

1'-2

REMIN

2CTL

Muting
loTAPE-2

Selector
"L"

Select
" L"

Select
"

Select
"L"

Selector
"L"

Selcctor
" L"

Select
Swit

GND

TAPE­1'-2

L"

R

cmote

signal

during

or

during

or

during

or

during

during

during

or

ching of

terminal

20N/OFF

outpur

out

put

terminal

signa l output te

200mS

aftcr

signal ou tput

200mS

afr

er pushing remote

CD

changc-over

200 mS aft

PHONO

200mS

sign al outpu t t

200mS

signa l outpu t t

200mS

signal ou tpu l

cr

change-over

after pushing

aftcr pushing

after pushing remote

" J-I"+-> " L" by

control

signa l

control

is

chang

ed-ov

for T A

rminul for

pu

shing

terminal

signa l

pu

shing remote control

erminal

erminal

terminal

input

input

cr

VCR-

rcmote

for

VCR

outpur

sign al

remote

for

TUNER

renr

ote

forTA PE

for TAI'E-1 cha nge-ovc r

mcans

o f rem ote co ntro!

terminal

terminal

wiih "L"

input

Descrlprion

PE-2

cha nge-o ve r ''\-'1''

2 cha nge-ove r

contr

ol

VCR-2

-I change- ov cr
control

VCR

terminal

out

C D

put

terminal

co utrol

PHONO

cha nge -o vc r

control

TUN

-I change- o vc r

cont

rol

TAPE-I

during

KEY

-1

KEY

KEY

KEY

ER

KEY

KEY

TA PE-2 KE Y

200mS

chang

e-over

tim e

24
25 CO
26

27

28

29
30 SP

31 M .
33
35

36

37

38

39

PRO

POWER

STBY

C D

STOI'

PAUSE

TECr

NT

INIT

UP

B .

CTL

OFF

MO

REW

Fr

REC

Pror
Power

IN

Power

Switching
T

Output terminal
" L" c1ur

O utpu t
Speaker control

Main pow

erial

D E

S

Cassette deck

"H"

-

C

" H"
Casse tte d e ck c

" H"
Cassc tte

"H"
Ca

"/-I"

eeti on

so urce
so urce

of

erminal for

ing
terminal for

er

signal

during

asse

ue deck

tluring

durin

g 200mS afte r pu

deck contr

ehrring pu

ssett

e d

eck

timing 200mS

function

300mS

outpur termin

200m

200mS

condiiion
control

"H"

+->

incli

cati

for

wh cn pow

out pur

sour

cc

controi

S aft

control

ontrol

shing
control

input

"L"

on

stnrt

back

OFF

after

ol

of

after pushing

terminal;

input

outpur

(ON = "H

during

of selector

up

terminal ("L

det

al f

signal

er pushing

signa l outpu l te rmina l

pu

shing

signnl o utpur

shing rem

signal

rcin

or c co ntro l ST O P K

signal o utpur t

with

"

J-I

terminal ; conn

terminal

")

STANDI3Y; POWER

er

so urcc is

during STANDI3Y

cction termina

or

CD

ou tpur t

o utput

ON

" = spea ke r o utput O N)

co ntro l usc

erminal

rernor e

conrr

rern orc

cont

terminal

ore

cont

terrninnl

erminal

rem

ote

cout

"

input , out

ccts to

I

ol

REW

rol

rr

rol

REC

EY

rol

PAUS

put

POWER

rever

KEY

K

EY

KEY

E K

SI'

CTL

" H"

output ; POWER

sing

outp u r

EY

ON

with " H"

--

40

41

42

PLAY

Von

Extal

Cass

ette c1eck

1-1 " during 200m

"

P

ower

so

urce

Ccr

ami

c re

sonator connccti

contr

ol signal ou tpur t

S a fter pu sh ing renr ot e

terminal

on

terminal

ermin

al

cont roll'LA Y KEY

TX-7430

2.

Controller

connectio n

-;

--"

z r

c

~ c

rn

()O

rn

!>JJ

-:i m

O (J)

JJ()

rn

z

-;

0

f

I g ib

el

le

--

d

(J) _ (J)

<0

0

;:: -"

(J)

::E3:

0

__

(Jl

~ CD

GlI-I-1

o ~ -

(J)

0 1- 1- 1

N - -

~ CD

;>;

;:: ;::

OII

m

O)N

N

~(f)

(J) (J) o c>-

0<0

JJ

-<

-.

KE

Y/O

MATRIX

/OOE

-

L......-

rn

C

-q

-"

m

.o

l

MUT E

4 2

AUTO/MA NUAL

4 1

UP

4 0

DO

30
29

27

25

22

WN
INT
A

B

C

0

FM
MW
LW
SHIFT

~

P S C I

AM I

FM

.

CE

EOI

E

02

SO

3 9

38
37
36
35
34

3 3
32
3 1

28

2 6

24
2 3

Irorn

re

mot

e con trol

070

5

BCD TO
DECIMAL

ECODE

D

~

R

0 1

12

, 0 1 11

AM +B SW

AM + B

AM

10

Q7 01
PULSE FM

1

1--

SWALLOW

PRESCALER

10

I

LOCAL

~

~

I

01

0 4,

0105

L.P. F.

07

I

GATE
CIRCUIT

I

0 3

I

.

VT

NOIS E
IF L EVE L

OSC

t

2
3

4

5
6

8

9
10
I I
12

13
14

/5

/6
17
18

19

20
2 1

\J

I

7

CGP

\..T

Sg
SI
Se
Sd

Se

Sb

So

K3
K2
KI
KO

-

0

--J

0

.l>

-

-

06
05

04

03
02
0 1

XO

5

X I

T

Voo

!

~

I' in No .

I

2 - 8 S;l - SI'

lJ - 12 -KO - K J

D-

IlJ, 20

2 1

I S

Sym bo l

(

'(J

-

IJI

X 2

X I .

V

DO

P

1)6

Te

Segme nt

retu rn sig ll<!l

K ey

in pui s

ou

D igit

X 'l al

Po w

er

rmi

nal

O u tp ut t

- - -

- - - -

Oll

I put s

tpu

ls D isplay tu bc digil

sot I rce

inpu

Displ

ay t ube

ac ti vc hi gh. Sincc Ih esc

to th e seg

Te

rmiuat

rc tur n signal so urcc

Conu

ec t

Dev

t

ice

[ro ru the super capaci tor C7 14 Ior memo ry preservat ion.

..

erm

inal

Io r sound

te

s i g n ~

meut

s ro r in p ut o f t hc

10 t he 4

pow c r so 1I rce

rmina

1

terminuls

out pul signal

to di odc

.5M

H z

tc rmi nal ; sli ppl ie5

- 8-

Dcscri

'

'I'E

E'' .

l ou tp u r

ermi

nal-, can h,lIl d le JO

t

of

ih e tl u

or

ret u rn sigllals

key

te n u iua is:

matri

x.

cry

sral osci l

p tion

rc

ruru

an d kc y

escen t di spla y

nc ti ve lo w. 0 1 is uscd th e key

lutor.

5V

dnr

signa l source te

V,

th e y are co nncc rcd d

tub

e.

lr

om extc ru al

il lg no rma l operanon and

maui

rmi

nals:

x circuit.

irec

2.5 V

t ly

TX-7430

Pin No .

22

Symb

SO

ol

Te rmina l

Sta tion det e

signal input

Err

2:\, 24 EOI, E02

25 CE Chip

26

27

FM FM local ose illato r

AM

or o u rp u rs

enab

slgnal

input

A M loeal osc illa ro r

signa l

inp

2R PSC Pu lse swallow

com ro l ou tpu t

etor

Input termi nal for de tee ting
reeeiv ed d uri ng uu

Char

ge pum p ou tp ur of thc phas e detecror with

level is o utpu t whc n

io-

tu ning.

t he dividcd oscillation frcqu c ucy is highcr rhan

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 o

tor

ca paci
T he

diode in rhe fro nt

ou lpu t fro m bot h tcrm iuals is sa me , but o nly E0 2 is usc tl.

le Deviee selcction signal inp ut t

l. ow le vel ... Mem ory pre sc rv.u ion

Input termin al

[or FM loeal osc ill.uor

Q7()1.

Termin

ut

al

for inp ut o f ihe

Thi s t

ermin

al

outpu

Q70 1

to 1/10 o r 1/17 whe n rhc pu lse swa llow meihod is used [or d ivision.

A M local oscill.uor signal.

ts a signal t luu swirchcs t he pre sc.iler division r.uio of

(FM only)

Dc scripiion

whethcr

Stopped

or not a brondcast signal is bcing

by t he high level.

utp

end

thr

ou gh rhc low pass filler Q

ermin

al .

High lcvcl

is divided by I/l o o r

--- ---

cons

i i ru res th e PL L. High

ih

c

ur is npp licd 10 the varia ble

I04

a nd Q

I05

... No rma l op era no n

1/17 by prcscalcr

.

29

30 S

31

32

33

34
35

30

37

3R INT

39

,.j()

4 \

-

42

G NO

HIFT

LW

MW

r-M

A

B

C

0

MEMO

ME M

RY Merno ry down

OR

UP

AUTO

MANUAL

MUTE

Grou

nd

Pre set rcve rsc
indieatio n ou tp ur

Ba nd switching

signal o urputs

Prese t sra rion

indica rion OUlpU

inpu t

Mem ory up

Y

inpu

t

A u
indi

to/Ma

cation

I

Mur ing o ut

nu al

outp

pu l

Te rmina l fo r ind ienn on ou tp ul whei her

MI - M8: Low lcvcl M9 - M 10: High

Terminal

terminal of FM (pi n

(pin no . 3 1

Te

IS

A

n

C

0

Not

Terminal

s for signal o utpul switehing of cach band . High level is outp ul frorn

11

0.

& 32) duriug r M rece prio n

rmi na ls for

MI M2

I

()

() ()
() ()

uscd.

ßCO

code o utpur of pre sc t stutio n indic.

M3 M4 M5 MIl M7 MS

()

I

I

I

()
()

for

down signal

Acriv e low.

T

ermin

al for

up signa l inpu t

Ac iive low.

-

Te

rmina l Ior irul ica tion

T his t

erm

ur

O utput t

inal becom es hig h dm ing ,1

ermin

al which
released; nctivc high . T in: muti ug signal is outpur as show n below .
UP/OOWN

ancl

preset

of manu ul/au to moc le , presel Illelllory is reeall ed , b.uid swirching

scan.

---

MI - MS o r

-

M9 - MI Il the prese t key.

level

33) .md low lcve l is out put lro rn o rher t e rm inals

..

-

-

uor.

()

I 0 I

()

0 I I 0

I I I

I

() ()

()

inp ut o f p re set

()

mc m

()

()

I

ory.

of pre sc t mem ory.

output

mute

whe t her or auto i he tuni ng mod e.

11

10 morle a nd low (hlring munu nl mo de ,

s rhe shoc k noisc oeeurrin g whcn rhe PLL is

TX·7

430

Control key and diode matrix connections

K3('1) K2(

' -

Sg(2)

Sr(3)

S

e(4)

S

d(5)

Sc(6)

Sb(

7) HI -l l L

Sa( H)

--

M4 /M 14 M3 /
MH

/MI

H

S I-

f1n

A U

TO

MAN

UAL

l'NIJ

'l0/'ik

Hz ' LW2 ' L W I

[) I (I H) ' I3A N I) 0

Dio

de

111"1

z .

rix

DANDI

.. ..

....

•

n A N DII,
lO

/lIkH

3. Muting circuit

01 03

FM IF &

AM rad io

svstam

111)

MIJ

7/M17

M

-

I'IU

,SET

SC

A N

_ .

LW M W

M

EM

I) IS I'

OI ~ Y

I.A

Y

M2/M 12 MI
MU

MIIJIM20

---

I)

I'R O GI ~ A

--

' IJA N D I

"M

I" I/\(I oc llillgs . Se e tnble 2 .

AM

I

,,"

\(I oe ll illgs . See tub le 3.

8

' I

lro m

0 106

KI

M I(,

OWN

11tH

mUl

(II)

--

-

in9 Ou

..

M

- -

- -

IPU!

M

----

M3/M

_-

" M

UI'

W I
N A R

'A

ST

DY

0 ' c o o

,-

KII( 12)

/MII

5/M1

-.

DEI

IW

---

M

-----

AT

N A

rnblc I

trou

- -

5

IY

IC/

--

W

-

er rc

-,

070

from

llA

N DIl BA N D I

-- - _ .

D7 J0

0: Open I : Conue ct

A M

lJ

0

--

I

11

: O pen I: Councct the diode ( 1

2 ri1\ '12

TKC

020

4

1)70 '1

0

0

1 I Europe 87 .50-

IOkH ,J9

kH

z

D711

0

1

11

Lch

FI~E

I

~E GI O N

U S .A . R7.'1- 107.'1M Hz 200k H,.

the

diocle (I S

FI~ E Q

UE N C Y I

530- 1620 kH z 10kH z
522
53 1- I

.-

QUEN C Y

AN

G E S

H

-

I08

.00 M H z

SI3

3) . tnhle 2

~A N GE

- 16 1l k

Hz

W2k

Hz

.'1.'1

133).

C I IA NN E L

I'A

CE

50k

Hz.

CII ANN EL SI'AC E

9k

Hz

'1k Hz

iable 3

The rnuting

1.Wb ile pi1l 4 2 of co ut roll er IC ou t pu ls thc high lcvc l.

Q207
the foll ow ing "cascs
is
recalled. and
using

2.

When
muti

Thc IF levcl in th c I:M

cir

cuit

ope rat es in the fo llo

and

being

held

aut

o search

Q208 ar e

down.

(3)

Whil

tumed

.f

Ü

While

(2)When

e a

tuning

on and

radi

.

an FM st a tion is not being rec

ng s

witch

is on) .

110

systcru (

wing

case s ,

muting

is

clo

the ma nu al UP/DOWN

a st at ion in th e m

o sta t ion is be ing rec e ived

eive

d (a nd

sct

a t

IUOI

SO

llllll

sed in

emory

the

ili g

0 20 1

S

tereo

swi t ch

is

011 2

0 7 15

16

dec

oder

is 0 I'C llC U a t 17 .Zd Br

po int 55 k Hz
a

t p iu R th rough the A ND circuit. Wheu a sla t ion is tur ued ,

tlie o

utp

ut goe s to lhe 10

"'h

en o utput gocs 10 t he 1

Q I 16 is tu rn ed

so

rnut

ing is
decod er Q201 g
osc illa tor st

Reh

R7 5 3

and

(100kHz

art

step) :

Oll

and

Q207

operred.

At

oes

to th e low level . so

s ,

zer o -c

30kHz.

11'

levcl .

011'

level,

nn d Q2 08are

the

M

ONO

ross

d ct c

ctiouc

(5 0 kHz. st cp ) -ar c o utp ut

Q1l

5 t ur ncd of'I,

sarne

, pin 16 of

tunr

the

irc

uit

ed o ff,

ster

VCO

(Iuning

eo

-1

0-

4.

PLL

tuned

A

block

the

Operation

The
div ider
is applied
with

10kHz

difference

is a
filter
to
the
the

Operation

The

unit

diagram

above

diagram.

reception

wnere

to

frequency reference

for

in Ireq uency is

pulse

t o

change

the

variable

reception

sarne

and

pulse

. In th is t

circuit

of

the

tuned

during

AM

reception

frequency

it is divi ded to lIN

the

phase

c

ornpar

D rnodel l . If fr

waveforrn

du r in g FM

s

wallo

it

into

capacitor

frequenc

Eo·O

w

ype

of

. it is

oe

y .

This continues

.

reception

metho

pre

scaler

of

the

is

applied

fr (9k H z for G

and

output.Since

passed t hr

volt

diode

d is

aror

fv di

age

in

used

to

and

where it is

Vd ,

the

in

. a supplernent

26 I

PLL

the

outpur

/W

ffer

. Eo

err

or outpur Eo

ough

which

front

unt

the

pr e

r-

sc

is

shown

pro gr

model

the

en d to

il fv

scaler

ary

equal

in

arnmable

as fv .

This

cornparated

s a nd

to

low

pass

is

applied

change

and

fr

of

number

the

are

thi

TX·7430

(chan

ged

acc

ordirng

divided

combined

divi si

and 1

The stat
m
frequency limit

pr

divi
The
divided
frequ

s

is
operation

recept ion

in

on

Iac

ex

tern

to

al con tro l

/17

when it is " L ").

ion osc illat or

able

div

ider .but

escaler i which

sion

to

sign a l is

t o l

ency re fere nce in

outpur

as Eo

.

the contro! counter

ror is s

1/Np;

/N

to

frequency

wit

ch ed

(I/!6

the prograrnm

of

only

can

be

applied

. T he

result

until

the

program

from

1/16

or

whe n th e PSC t

frequenc

to

a

30MHz.
used

the progr

the

phase

rnatch

y is

up to

is compared

is obta ined as in AM

the

an d

1/!7

app

abl

e d

so

the

ISOMHz.is

ammab

derector

code

input)

presca

the

presca

acco rding

ermin

al is "H "

lied

to

ivider

pulse

le
with a

and

and

ler

are

ler' s

the

program

has

an

upper

swallow-type

insert

ed for

divider

25kHz

e

rro

and

r

the

-

5.

Auto

Q103

FM

IF&AM

SY

STEM

Q113

N

OI

SE

DETECTOR

search

12

tuning

8

TO

STEREO
DE

CODER

D10 7

1""1

circuit

07

03

P

+B

2

TONED
INDICATOR

2N

OCC

r-- f--

06

During

cc

w

-.J

-.J

0

FM

ti on a nd

IF & AM systern IC o f Q

circuit of Q113 .

ou t pu ts go t o th e l

caus ing p in

u

(0

co mp lete 3U to sea rch t

During

AM

tion

included

station

is

JC

to go to th e high level to co mplete aut o search tu ni ng.

recept

zero cr

tumed

ion .this

oss

Whe n a sta tion is tuned , the o utp u r o f a ll

ow

22

of

the

recepti

in th e FM

. Q

703

is opera ted b y

detecti

on ci rc u its incl ud ed in

I03

and by th e

level so Q

con

on.

703

tro lle r IC t o go to the high leve l
unin

g.

this

is

IF

& AM

go es to

off,

no

goes from o n to off,

operared

system

JC o f Q

causin

g pin 22 of th e co

the

IF

leve

the

IF

I03.

the

level

When

isc co mponent d

by

l

dere

FM

ete

a

ntr

c-

ct io n

derec-

oll er

-11-

TX·

-12-

m

I

~

U

> >

~

...J

<C

c

r

0

2

0

,

Q

Q.

U

...J

Cl

-

~

0

oe:(

-

-

u..

w

er:

CI)

w

oe:(

~

a:

U

f-

0

Z

I

.

z

S l "' NI

l O t:l J NO '

ll

"t:lH

C!t' )1f

UJ J.U I"I

IOtfJN

]l
Ol"

S:TW)

O)

J l:l

1 11' "

7430

«

u

>

>

~
~

0

.

o z o

z

z

::J

UJ

I-

I

0:::

Z

.

~

2

. ,

.

~

~

z

c a

0

CI)

UJ

L_

u

I-

I

0

z

I

I

I

I

I

I

I

I

.0

~

TX-7430

BLOCK DIAGRAM OF IC

LC7818

(Function

I 1 1SW A}

Al

~

o

-'...:'

-

,I 11sw8J

BI

0

C l ~

o 1

~

-'-, '-I

~

s/ _ ll 'iw I

EI

-

,I

I 11

l

M'~

,I

O U T 1 -

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<>-I~O~I -

"I 1MC1L

.,....;

"-'-

---~

- "I

t..C l l

O----

BCTL

o--',!..

, I_ _

IU 11

Switch)

--j

~

~

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SCl

115w I

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swGI

mw"

~

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l

f-

>_

-,-

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--j

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I !.W8 )

I SwCl

rt sw )

rt sw I

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z

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w

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w

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8 1

C1

02

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1

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1M7

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VS \

,

'

MU

TE

Voo

TM2

CE

2 SOURCE I

50 UR

LC7818

E2
0 2

C2 CI

8 2

VEE

TM!
OU

EI

01

8 1

AI

T1

I"

I

p PC116 1C3 (Stereo

pPA80C

(Buffer)

Rl

20K

decoder)

16 2

15 3

14

13 5

12 6

" 7

10

R2

20 K

-14-

TX·7430

LB1630

(Motor

Drive)

Voull Voul2

,--....,.---t--~..,...+-t-..,....~--,.---t---....,.--OVcc

l---+-------+..-II-~:)C>ND

Vinl

TRUTH

7

LA1266

Vconl

2

V

in

2

IN 1

H

L

H

L

TABLE

IN 2

(FM

0

"

~

OUT

OU

L

H L

H

L

OFF

OFF

T \

H

2 MOTOR

L

H

eH

OFF

Normal

Rever s e

Wail

Wait

IF and AM radio system)

.

~

~

~

.

~

~

~

~

s

•

~

x

~

s

~

74LS145

(BCD to decimal decoder)

I1PA81C (Buffer)

16

,..----<_-+-I-.-

RBI

--.-_-+-+-

15

INP

NO

0

C

0 L L

I

L L L

,

l L

) H H

l I.

,

H

L

LHL

s

H

6 L

H

I

L

C

•

l

•

HLH
Hl H HHH
H

H
H H
HHH H HHH
H H H

14

- __-

--.

-+-_ - .._-

Pin6:NC

UTS

A

0

B

L

L L

H H

H

H H

H

L

H
HHH

L

L

H

H

H H

H

L

H H " H H

H

L

L

H

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l

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L

l

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H H

L

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HLH H H
H H

H H

H H H HLH

H H H

H H H
H H

"

H H H

H HHH

HHH H

H

13

..-H >-

uTP

U TS

6 1

.s

H HH H

HH H H

H
HHH

HHH H

L

HLH H

H
H H H H
H HHH
H HH H
HHH

HHHHH

H H H H

H H HHH

----<t----<H 4-

,

H H

H

H H
H H

H

l

H
H

H H H

H H

o

"

~

o

~

o

•

H

H

H

lH

H

12

- _ - _ --+_ - _ -

11

o

z

o

10

+_+------<1

9

'--t---

2

-+--+---

..--+---

--..

---,I-

5

RBI ' 20KO

--~

_+_-----..-f---

6

Rl

20KO

RB2 : 2KO R2

--~-

7

_D

100KO

8

TX-7430

f1

PB553AC (Prescaler)

Pin Connect ion

J. Pin J (Vcc)

2 . Pin 2 (IN)
3 .

Pin 3 (CHK)

4. Pin 4 (GND )

5. Pin 5 (OUT)

6. Pin 6 (PSC)
7 . Pin

7,8

T

iming

Chart

........ +5 volts Su pp ly

........ FM Jocal oscillat or sigual inpu

........ Check termin al

........ Gro und terminal

........ Prescaler terminal

........ Prescaler co ntrol terminal

........ Not con nec ted

t

Block Diagram

PSC

(HK

IN

NJM4558!4559!4560

Vcc

(Op .

amplifier)

IM

CHK

PSC

X ((NADLE

PUl

St)

+-

OUI

- - -

f---

- -

-17

BA6124!LB1403

-..1

L j

pvlus - -

--+

-

--16

(Signal meter drive r)

-+-

PJh~s--

-+

~

4066B!LC4966

(Analog

CONT A ' IN/ OUT 'b UT/ IN

CaNT 0 OUTI I N I NI OUT

switch)

SW 0 SW C

12 10 B

1 5

INl aUT OUTIIN CaNT B

'----

CaNT/ IN!, I N/ OUT! CONTC

---

SW A SW B

~

Vss

PACKING PROCEDURES

TX·7430

REF. NO.

1

2

3

4

5

6

7

8

PART

NO .

29 100034
2905 145 6
290514 58
28230 1
290911 58A
29091 157
2911003 2
2600 12
Aeeessary bag ass' y
2934 1115
292 092
232 119
20 10 141

159

20 10
30 1005 4

40003

24 1

29365020
29

100006A

DES

CR

IPTION

850

X650 mm, Poly-vinyl bag
Master ear to n box (Silver mod el)
Master car to n box (Black mod el)
Sealing hoo k

Pad R
Pad L

Tap e

Dam plon tapc

Instruetio n manu al
F M a ntc nna
NMA-3052, AM loop ante nna

cord

Co nnecti on
Connect ion cor d for C D player

UM-3, Two
RC-82S,

mitter

trans

Wa

rranty

250 X

350mm

for easselle deck

batter

Remote

ies

co ntro!

card

, 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

7 .5kHz devi.

AM:

•

Output

400Hz , 30% mod. ,

Connect the non-inductive type resistor o f 8 o hms to the

en

speake r terminal A o f J

and right charmels unless o ther-

wise not ed .

signal 19kHz

•

Standard

knob

position

TAPE MONITOR SOURCE

VOLUME Maximum

BASS/TREBLE/BALANCE Center
MODE STEREO
SPEAKER

'"

SIMULATED STEREO ,

, A

OFF

SELE CTIVE TON E CONTROL OFF

Amplifier

J . Idling current adjustment

C onnect the DC voltmet er to the terminals IID and V

section

CT on

the power amplifier pc board .
Adjust the
indic ation of voltrnet er is 7.5

serni-fixed resistors R507 and R60 7 so that the

± 1.5mV.

Notes: VOLUME Maximum , Open load ,

Adjust after switching on for 5 minutes.

J

- "

°0 °

x

u

,

.J 0

°

00

<X

w >

~

u

x w >

~

0

00

<X

~

u

-

°0°

'"

<X

P

ower

amplif

ier pe boa rd

-18-

F

90

2 6

I H I

_

F 9 01 6

o:

~

~ ~

<]

~~

~

FM

section

nec

rio n Stereo m

Item Step FM SG ou

Con

of

instrurn

ent

tput

lator

odu-

out p ut

Tumin

settin

g dial

g

Ou tput indicat or

Adju

stm

ent

Adju

s

Fig. I 99 .IMHz

FM

IF

Ste reo

level

VCO - 99 .1MHz

Stereo

stortion

Di

Stereo

S

eparation

end

Hi-bl

level

I

2 Fig. I

I

f----

f----

Fig. ;

2 16

Fi

g.2

Fig. 3

I

Fig. 3

2 E

.3

Fig

99 .I MHz

I kHz, 75k Hz

65dBf

99 .I MHz

17.2 d Bf
xt. modul

E

99 .1MH z

.2dBf

modul

Ext.

99.lMHz

1kHz,

65dBf

99.1MHz

65dBf

Ext. modulation

99.

IMHz

65dB

xt. modul

99 .l MHz

35.

2dBf

1kHz,

devi.

(60 dB)

(l2

dB)

ation

(11dB)

ation

75kHz

devi .

(60dB)

(60dB) L or R

f (60dB)

ation

(30 dB)

75k

Hz devi ,

-

-

L+

R: 1kHz

ot

Hz

signal :

1kHz

devi,

eh. 1kHz

kHz

67.5 kH z

Pil

19k

7.5k Hz devi.

Lch . 1

Reh .

-

99 .I MHz

99 .

99

99

99.1MHz

IMHz

.IMHz

.IMHz

oltrnet

DC v

er

IDist or tion analyzer

S

tereo

indica to r

Frequen

cy

counter

Distorti

on anal yzer

Reh . AC voltmeter

Lch . AC voltrneter

Hi-blend ind

icator

Ll

OI OV

Ll02

Minimun

I

Ligh t on

RI OI

Ligh t off

R201

IF on
front

end

R20 2

RI 0 2 Light off

19kHz!

Minimu rr

Minimurr

Minimurr

AM se

Step

I

2

3

4

5

6

ctio

n

AM SG

ou

603kHz
400Hz
60dB

/m

14

04kHz
0Hz

40
60dB

/m

999kH z
400

Hz 30%

0dB

/m

6

Same

tpu

t

30%

mod

30%

mod

mod

as above

AM

A

l OOP

;s:

T

fre que

22kHz

5

1611kHz

60

.

140 4kHz

.

.

999k

999

Tuned

3kHz

Hz

kHz

ncy

Ou

tput

indi

cator

Digital DC

voltrneter

Digital DC

votmeter

AC

vo

ltmeter

AC

voltrne ter

AC
vol trnet er

First signal

indicator

UNIT

Adj ust me nt

p

oint

OSC on
RF block

RF on

block

RF

TC o n

RF

block

XI51

RI

5l

OUTPUT

Adju

I.4V

8.0 ± 1.0V

Maximum

Maximum

I

I

Maximum

I

Light o n

AC i

I VO l D IETER i

I

st

for

! 0 .1 V

Repeat

until

nece

is

Remarks

the

steps 3

no further

ssary.

and

4

adjustment

I

Refer

enc

Tun

Auto stop level ,

e specif

ed voltage E

1C

i

- 1

9-

TX ·7430

-

1Hz

~

Rernarks

M

urin

g swi tch : off

Repeat

the st

and

2 u

ntil

f

urther

adjus tment

is

nece

ssar y

Muting sw itc h:

Ma

ximum and

same

separat

I

no

eps

i

cn

on

OUTPUT

n l

1

SIGNA L

G

~

N

,-

- - - - -, [I

}-_-.--_..;--------,L.-.--.-

ERATOR r -

.......

--'

ANT

TE

R ~t1SAL

EXT. " lO DE

L-,

-;:

f

:;:

M

,

~~~

I

__

-;-

---

\

~,(

\

TE R ~t1NAL

Fig, I

_.-

-!

-

3

i ANAL

1

"L

-,-.J

'I -

~

'

TO

Rj--i'-

ANT
TERMINA L

Fi~

DISTOR~

Yl

ER

Fi

~

2

OUTPUT

UNIT

AC

VO Ln

IIT E R

L

~

TI

! I ilOSCILLOSCOPEI

~

D

IS , OR T IO

~"

1

~

"'''

I.

ations

5MHz 2.0 :!: 0
OMHz 7.7 :!:

L Less

than

1: Less

than

.5V

0.5V

66dB/m

20d

BI-'

T

P-6

o

RF BLOC K

LIO I

@J

~

L10 Z

TP

-7

[J [J

0

T

E

P2

o

L-

R

T~

'OO

RZ O Z

l~l

X

l~

l

rJ

RIO

I

0

Rl O2

TP'

[J

---'---'

o

RZOI

E

o

...

-20-

PRINTED CIRCUIT BOARD - PARTS LIST

POWER
(NAPS

CIRCUIT NO. PART NO.

Q501, Q60 1

05 02, Q602

Q50 3, Q603

Q

0 50 5, Q60 5
0 506 , Q606

Q507 , Q607

0508,

Q509 ,

CAUTIO N:

0551·
06
0554,

·2875·2A)

504,0604

0608·~

0609

0 553

5 1

0 804

AMPLIFIER

Trans istors
22 11371 0r
22 113 72
221 1732 0 r
2211 733
2211 35 3 0 r
22 1135 4
22116

2211634
22 112 55
22 1265 3 0r

22 126 54

22 1164 3 0r

22 11644

2201 78 3,

22017 84 0r

220 1786

o: 220 1773,

2

220 177 6

Replaccment for tra nsisto r o f rnark c if neeessar y,
mus t be made fro m the same bct a gro up ( HFE) as thc
or iginal typ e.

Ex. 2SC385 4(

2211732
22 117 33
221 1792 or

AND

POWER SUPPLY pe

33 0r

201774

0r

0)

T

Sam e bet a group

0r 2SCI 84 5( 1') or

DESCRIPTION

2SC225 9( 0 ·00 1) o r
2SC22 59
2SCl

2SCI 84 5(E)
2SA949
2SA949(Y)

2SC2229

2SC2229(Y)

2SC I8 1

2SC34 21

2SC342 1(Y)

2SA965( 0 ) o r

2SA 96 5 (Y)

2S08

2SC38S 4( Y) or

2SC38 54( P)
2SA 1490(
2SA I49 0(Y) or
2SA 1490( P)

2SA 1490f O)

(0·

002)

84 5(F ) or

(0

) or

(0)

5(GR)

(0)

54(O),

0),

or

or

T

2SCl 845 ([ )
2SA992 ( I:) or

BOARD

Q805
Q807 , Q903
Q90 4

Q902 , Q905

050 1,0

502

05

0 3

,06

0 3
0802
090

1·0904

0905 , 0906

0907

0908

0 909
0910

0911

C50 l ,C60 1

CS 13, C6 13

C515
C5 16

,C5

17

C55 2
(' 553 354 7
C80 6
C90 1
C904

,('

905 350 4207 6800ll F, 50 V, Eleet.
C906, ("907 35476 1019 100ll F, 35V, E1eet.
C908, C909

22117 93
22 11 256
22 11255,

22 10746 0r
221 2485
220 1754,
2201755 ,
22014 04 0r

2201 405

Diodes
223 163
4000068
22316 3
223897

0r

223

80003
2239651 0r
2243 24 1
223 86 2 0r
223890
2238960r
223880
223 163
223 9631 or
22

4323

1

22 39

4930r

22 43 163
Capacitors

354

780229
35472 1019
35

47222
35
35472 2219

354 744 709 471lF, 16 V. Elcct .
3500065 A

3912422

19 2201lF, 6. 3V , Eleet.

4790

479

80109

17 2201lF, 16 V, Eleet.

2SA992( E)
2SC18 15( BL)
2SCI8 15(G R),
2SC945 A(P) or
JC50 1(Q)
2S0 19 13( R),
2S0

19 13(S),

2S0

1406 (Y) or

2S0

1406 (GR )

ISSI B
VOI222
ISS 133
P300

0L

or

I

N5402F
R0 1.3EB l or
MTZ 1.3A
WLOl or
WOI RL
1N400 3F or
GP10 1N4003

ISS133

RO

l2E

BI or
MTZ1 2A
R06

.2 EB3 0r

MTZ6.2C

2.21lF, 50 V, Elect ,

100ll F, 6.3V, Elect .

4.71lF, 100V , Elect .
22 01lF, 6.3V, Elect,

IIlF, 50V. Elect .

O.OIIl F, AC400V/l 25V , IS

TX·7430

PRINTED CIRCUIT BOARD VIEW FROM BOTTOM S

R902

R903

C908

C906

0905

NOTE : THE COMPONENTS lDENT IF IEO BY MARK

ARE CRIT ICAL FOR RISK O F FIR E ANO
ELECTRI C SHOCK . REPLACE ONL Y WlTH

PART NUMBER SPECIFIEO.

ACI IGI

00000

.,

o

'"

"D

CD

~'"

~ ~~

~

~~~

C90 7 C909 I

R8386!°L s

J l l l l

.6-

- 21-

ACllDl

o

~

gl s

-

W N CD CD

E

0 C 0

"

r

-

~

o 0

w ...

5e

8

c~

<D

J

..-

0 _ ~

CD

0 "' _

"' ''' 0

CD

_

JNto

1

_

E B

Q903

Q902

B Q509

POWER

I ~~

,

,

L I

"'

.

~

.

I

I f L

n

.",

~ , ~

ce JJ

CD

W

AMPLI

n

ce

o

'"

J556

1----

f:';

' '''

, 0

FIER AND

L

'"

'"

POWER

•

f L

...

'"

""

'" .

~

*

I

I

I

J 544

~J5 43

E

?3'

8

--l

I

SUPPLY

n

CD
CD

J545

cr

J 57 .

-"

TX-7430

C91 1
C9 12

C914

C9 15
C9 16
C918
C919
C92 0
C92 1

o

PTlO)

8

51<'

35475 222 9
3547410 19
3547 44709
354 744 719
354 76 1019
3547 4 331 9
3547247 19
3547 62209
35476 10 19

5901

-JS0

2-

-8--.-.8

5WlGl

8

5901

C901

I-

C902

J503

~

~

AC-H

POWER

RL901

SWIOI

22001lF, 25V, ElceL

100 1lF, 16V, Elect .

471lF, 16V , EleeL

16V,

4701lF,

100llF, 35V, Eleet.

0llF

, 16V, E!eet .

33

470

llF , 6.3V, Eleet.

221lF, 35V , Eleet.

10011

F, 35 V, Elect .

8888888

AC

Elect.

AC3

E AC210l AC2lGl

R50 7, R607

R510 , R610
R511 , R611
R512 , R61 2

,R61

R51 3

R516 , R61 6

R521
R902-R905

R908
R91 2

R914

S90 1

RL801
RL90 2

P1l6

P352

F90

2a·F

906a

F902
F90 3, F9 04
F905. F906

Resistars

52

442
44
40

3

400 006 3
44 25 20824
442
441 6 2
4416

441 721 804
442 5

Switch

25

Relays

25 065 134

25
Socket

25050 270

Plug

25055

Fuseholders

25

Fuses

25207 4

25 2078
25 20 70

1006

522714
1620
000

63

5201 04

3914

204 74

222

0353

0652

133

0500

4

104

04

98

98

65

N

06HR1

0KB D, Serni-Iixed
270o hm, 1/2W,
l

ohm,

1W, Metal oxide film

0.47ohm, 2W, Meta! plate

0.47ohm, 2W, Meta! plat e

8.2o

hm, 1/2W, Metal oxi de film

lo

hm, 1/2W, Meta! oxide film

390o

hm, 1W, Met al oxide film

4.

7ohm
l Sohrn, 2W, Metal oxide film
22o hm, 1/2W, Metal ox ide film

NPS-111-L362P, Power

NRL-2P5A-DC 24-07
NRL-1PI A-DC12-40

NSCT·6P9 8

3Pl1

NPLG·

~

YSH403 T

~

2A-SE-EAK, Primary

~

5A-SE·E AK, Second ary

~

1A-SE-EA K, Seco nda ry

Metal oxide film

, 1W, Meta! oxide film

7

lE

C

UI
UI

N

E

PTIGI

8 [

ID~

~

r

J5 86 J58 7

J585

- '-Js

ä4-

-

·-~[~.3

-

-(

>!.

RL801

5..?l

110

.,

0

R61 1

m

J527

E

C

Q609

J523

BO

ARD

-22-

PRINTED CIRCUIT BOARD VIEW
FROM SOTTOM SIDE

PRINTED CIRCUIT BOARD

- PARTS LIST

RE

~O

~-I

PLAY

PLA)'

P302

T-'

RE

C

FM/AM

CIRCUIT

TU001

Q103
0 201

0301
Q302
Q303
Q304, Q404

C

Q801
Q802

P

Q10 1,0102

Q104

Q105

,

I

e;

,N

,g

I

TUNER

, Q401

,Q

l 13

NO.

rc

BOARD(NAAR-2869-2A)

PA RT NO .

Fro nt end

2

40072

ICs

DESCRIPTION

TFF

222 40039
222678

22 2534
22299 6
222 40025
222465 or
222 502
22240024
222807

Tr

ansistors

221 1722 0r

22 11723

40r

221229
22 11293
2211255

G3E111 X

LA1266

Cl161

5590

C3

-X

/lP
NJM4
LC78 18
LC4966
NJM455
NJM455

LM6

405G

80
80X

-2077

0r

/lPA81C

2SC

l923(

R) or

l923(O)

2SC
2SK108(

0)
2SK68( M)
2SC1815(G R)

or

J I

co

PH

P301

J I 02

-l. -

J 05

J I 04

JI0

TUOOI

lUOOI

3

- 2

5-

TX·7430

QI08-Q112 221 1255,

2210

Q114-Q117
Q202, Q332
Q203

7460
2212485
22119 45 or
221230 4

r

2SCI8 15(GR),
2SC945 A(P) or
JC501 (Q)
2SK246(G R) or
2SK38

Q206, Q331 2211455, 2S

r

JAI 0l(Q) or
2SA733(P)
2SD655( E) ,
2S
2SDI 4
2SC2878(A) or
2SC28 78( B)
2SCI8
2SC945A(P) or
JC5

lK6
R0

ISS1 33

Q333, Q806 2212495 or

22108 03

Q207. Q208

2211705,
2211706 or
2212794

Q305 , Q405 22

122850

221 228 6

Q80 3, Q81 1 2211255 ,

22107 4

60r

2212485

Diod

es

0 101. 0 102

0103

01 0

4-0

02

01-0 204

08

01

08

03-0

22313 2
2241291
223 163 I SS1 33

114

223163 IS S133
223 163
22316 3 IS S133

806

o

m

FM/AM

1(0

)

AI0

15( GR),

0655(F)

68(

or

R)

15(G R) .

0l(Q

)

0

3.3EBI

TUNER pe BOARD

Transformers

LlOI
Ll0

2

233 374
233375

Coils

NFIF-

4060

NFI F-4061

Ll 03 233 105 NCH-I 005
Ll04

UOl

L202, L203 233355A

Ll51

X

I0I-

XI 0 3 30100 43
X151 30100 75
X152 3010076
X801 3010

C

I08
C110
C112 35
C115
C116
C117

233031 0r
23 1081
23323 6

NMC-9-1 or
NCH·2 129
NMC-6027
NMC·4059

RF

block

232135 NMRF-7045

Ceramic

filters

SFE

I0 .7MM
SFL450 B3
BFU450C

099

Capacitors

354741 01 9 10
35478 0109

4782299

35

4780

339

354741009 1
354780 479

CSA4.00MG

0/-L

F, 16V, Eleet.

I

/-L

F, 50V, Elect.

0.22

/-LF

. 50 V, Eleel.

3.3

/-LF,

50V,

0/-LF.

16V, EleeL

4

.7/-L

F, 50V, Eleel.

Eleet.

C118. C120 35474 1009 10/l 1:. 16V, Eleel.
C121
C123 3547 84799
C124 354742209
C128 35
C129 3547822 99
Cl31
C134
C135-C137 3547
C202 3547
C20 3 354744719

C20

7.C2

C210

C2ll

354780 339

4780

35478 4799
3547 8022 9

08 3547

3547
354

3.3/lF, 50V. Eleel.

0

04 7/-L

F, 50 V, Eleet.

22/lF , 16V, Eleel.

479 4.7/l F, 50V , Eleet.

0.

22/-L

F, 50V, Eleet.

OA 7/lF . 50 V, Eleel.

2.

2/lF

41009
42209

41009
8229

780339

9

, 50V, Elect.

IO/lF, 16V, Eleel.

22/lF, 16V, Eleet.

47

0/-L

F, 16V , Eleet.

10/-L

F, 16V, Eleet.

0.22/l F, 50 V, Eleel.

3.3/lF , 50V, Eleel.

C212 354 78010 9 I/lF, 50 V, Eleel.
C213
C215

37013

4714 470pF ±5%, 1OOV, APS

35

4780

479 4.7/l F, 50V , Eleet.

C216 354744719 470/l F, 16 V, Eleet.
C220, C22 1 35
C222 , C803 35474 100 9
C807 35
C815, C816 35
C302,C402 354780 229

C305,C

405 35472 1019

C308, C408 354 78 022 9 2.

C309

,C3

10 39 12
C316, C317 35478 022 9
C341 35478 1099
C342, C343
C416, C417 35478022 9

RI

0l

RI 02

R151
R201
R202 5210072
R345-R 349
R802-R 809

POOl

P301-P303

S301

4780229

2.2/lF . 50V, Eleet.

10/lF , 16V. Eleel.
4780339
47802

29

422

17 220/lF , 16V, Elect.

354

780339

Resistors

521

0068

5

2100

70 N06HR

5210064
52100 62

3.3/l F,

50V,

2

.2/lF,

50V,

2.2/lF , 50V, EIeet.
10

0/-L

F. 6.3V , Eleel.

2/lF

. 50V, EIeet.

2.2/lF, 50 V. Eleet.

O

.I

/lF . 50V, Eleel.

3.3/lF,

50V,

2.2/lF. 50V,

N06 HR47K BO, Semi-fixed

I00KBD,

N06HR I0 KBO, Serni-Iixed

N06HR4.7K BO, Serni-fixed

N06HR 220KBDM, Semi-fixed

10k

ohm

4916 31034 05
491631 034 08

Termin

als

2506008

7

X5, 1/10W, Networ k

1

0kohmX8

, 1/1 0W. Netw ork

NTM-2POMN31, Antenn a

250451 66 NPJ-6POBL60

Sw itch

250 6528 6

(Co nt i nu ed on page 29 )

NPS-22

112, Mode, VCR-2

Eleel.
Eleet.

Eleel.
Ek

el.

Semi-fixed

-26-

PRINTED CIRCUIT BOARD VIEW FROM BOTTOM SIDE

DISPLAY

rc

BOARD

25 1326 70

-2670

NCO/5

VCRI

VCR2

G

5722

R76 /

,-

,lil

. -,

~

~

7-1

5723

0 736

J

_.

J600

CD CD

Nf

... ...

a:

0 ,

~

-'

D,

I

I

,

1

7-2

G

a:

Socket
PI OI , PI 0 2
Pll1
PI 12

DISPLAY

CIRCUIT NO. PART NO.

U002

Q70 1
Q702

Q70 4

0705

0 706 ,

Q703 , Q7 17
0720

Q7 12, 0 7 13
Q7 1
Q7 19

Q72 1

PU OI

0 701
070

0 707

Q707

4-07

-07

6

-07

pe

16

05

19

s

20006

57
25050270
25050268

BOARD(NADIS-2870·2A)

Opto.

modul e

24 1068
ICs

222 6 19
22240026
222 80 1
2227 4 145 1
22

280 1

Transistors
2211 255,
22107460
2212485

1260

0

22
22 11256
22 11705 ,

22 11

7060r

22 12794

Fluorescent

21203 7
Lamp

2 10064A
Diod es

22 3 163
2239

472

22

43152

223 163

or

r

tube

NSAS-LOP6 13
NSCT-6P 98
NSCT-4 P96

DESCRIPTION

BX-1407

).LPß

55

J/\

17 11ClJ-524

PA80C

815 (G R),

C945A

(0)

24 FS

15( IlL)

065

5(I:) o r

468(

49G

.25/\

0

5 .6 EB2 0 r

6ß

C

(P) or

R)

K

).LP0

~( PAROC

74LS I45
).L

2SCl
2S
JC50 I

OTi\l
2SCl8
2SD655(E),
2S
2S01

8-BT-

6.3 V,

I SS I 33
R0
MTZ5 .
I SS I33

0

740-0

74 7

0720
0 72

2-0

724
0 730
0733-073

-0

72 9

0 72 6

,0

7 39

0 738

C70 1
0 04
C706
C71 4

0 15

0 16, C7 17

,0

0 18
('720

C721
C73 0-C73 5
C736. C737

X70 1

R70 5-R7 17
R7 18-R724
R725- R728

S70 1-S
S7 18-S724

19

·('72

7I5

223 163
L.E .Ds

225 14 1

225137CG,

225 137 0G o r

7

2 24 13
225 142
225 142

Capacitors
35
35478
3537210
3020027
3000050
354
35
35472

354 74

9

30 2003 1
302 00 30
35 47 4 1019

'ta

X
30 10091

Resistors
49 L6322341 3
49 163 1044 07
49 1631

Switch es

2503554
250355

70Y

47233

4799

782209

4780

1019
1009

l

109

044

8

48

19

19

or

I SSI 33

SEL22 13C
SEL2 4 13CG,
SE L24 130 G or
SE

L24130Y
SEL2913 K
SEL2913 K

330

).L

0.4

7).L

0).L

10

0.04 7F, 5 V o r

0.047 F, 5.5 V, Sup er
).L

f , 50 V, Elee!.

22

I

).L

F,

).L

100

0).LF

1
CN3 RAE331M, Block
CN3 R7E33 1M, Block

0).L

10

XTL-4.5 M

22 kohmX 13,

100ko hmX7,

04

100 kohmX4,

NPS-I I I-S5 10

-III

NPS

F, 6.3V, Eleet.

F, 50 V, Fleet.

F, 6.3V, Llect .

50V

, Elect .
F, 6.3 V, Elect .
, 16V , Eleet.

F, 16 V, Elee t.

I/lO
I/lO

I

/I

OW, Netwo rk

-S51O

W, Network

W, Notwerk

- 29-

TX·7430

57 18

1757

0733

~

9

co

A

M

"'4

\"'

@J

5711

5706

~

12

L r--

w

o

'"

L

W

Ö

L

W

"L-

-=--

Holders
27 1905 18
27 1905 19 Sele

Cush

28 140 538

PREAMPLIFIER

lon

r-c

BOARD(NAAF-2871-2A)

APR

ctor

10X40X 3.5

CIRCUIT NO. PART NO. DESCRIPTION

ICs

Q351, Q451

2225790
2225 70

Q352 , Q355 22 2

222

r NJM4560D or

N
4650r
502

NJM

NJM4

JM4560DX

4558D

558DX

or

Transistors
Q353, Q35 4
Q45

3,Q454

Q808, Q809 22

22 122

22122

11455,
10803

22

12495

22

850

r 2SC2

86

or

878(A)

2SC287 8( B)

2SAI015(GR)

2SA733( P) or

I0l(Q)

JA

or

Capac itors
C351, C451

C352

,C4

54,C4

C3

,C4

C357

C358,C45

,C4

C359
C363
C366
C37 3,

C374 35478 03 39 3.3

35478 0229

52

35474

1009
54 352983 396 0. 33
57 35

59

47410

3547

8

35

09 101lF, 16 V, Eleet.

810

99 O.

47810

99 O.I Il F, 50V, Fleet.

354 74 1009 101lF, 16V . Eleet.

780229

354

C808 3547 410 09

2.2Il F,

50V

1011

IIlF,

2.2Il F, 50V ,
11

101lF, 16V, Eleet.

, Eleet.

1:, 16 V, Eleet.

111'

, 50V, Non-po lar elect.

50 V, Eleet.

lle

F,

50V

, Eleet.

PREAMPLIFIER

pe

BOARD

Resistors

R355, R455

510

4202

NI2RGLC50KC25Z

, Variab le,

Bass

R359, R459

510

4202

NI2RGLC50KC25Z,

Variable,

Tre ble

510

R3 91

420 1

NI2

R LC250K W25Z, Variable,

Balance

Switches

S351, S352

25035556

NPS-222-L51 8

Sockets

200
2

50502

0590

70

NSAS-6P546
NSCT·

6P98

P352
P353

,

ct.

-3

0-

PRINTED CIRCUIT BOARD VIEW FROM BOTTOM SIDE

TX·7

P251

."
N

~

A26 1
A252

A260

A251

E

E

C255

A263

0255

A262

C254

C2S1

C256

."

m."

C%

w

.,,

m

~

256

CZ52

;;:

."

'"

0254

B A257 E

A255
A253 E

C253

B

- 02 7 1

G

A259

E

A25B

025 3

0252

A273 ,
A271 I

A27Z ')'

0272

B

B

A256

B

A254

14

<..

,m

~

U

n

N
UI

....

1

0

SWITCH PC BOARD

REMOTE CONTROL

TERMINAL

PC BOARD

PRINTED CIRCUIT BOARD

REMOTE
(NAETC-2878

CIRCUIT

0251

Q25 2 22 11

0253-Q2

0 271

C25 1-C253
C254, C255
C256

P25 1

P801

P I 04
P

I05

P80 2

56

,0

272

CONTROL

-2)

NO.

PART

JC

2228

T

ransistors

22 108
22 12495
22 11 255 ,
22 1074
22 12

Diodes

223

163

Capacitors

35 47 4

472

35
3547 4

T

erm

452

250

Sockets

25 05 0 294
2505
2

5050272

Jack

25045 2 15

TERMINAL

NO.

4066 1

455,

030

r 2

60

r

485

1009

47 19

1009

ina l

16

02 68

PC

BOARD

DESCRIPTION

40 66 B

2SA I O

I5(

SA733(
JAI
2SC
2SC9 45 A(P) or

JC50 1(Q)

IS S I 3 3

1

0J.l

47

10

NPJ-4POBL94

NSCT-8P I 2 1
NSCT-4P96

NSCT-

S-G85 15

G R),

P) or
OI (Q)
I8

15(G R) ,

F, 16V , Eleet.

0J.l

F, 6.3 V, Elcc t.

J.l

I', 1

6V,

Eleet.

8PI

OO

PARTS LIST

SWITCH PC

CIRCUIT

R386

S354 250 35 557 NPS-14 2-L5 19, Push switeh

NO.

, R486 6 1

BOARD(NAAF-2879-2)

PART

NO.

8200

3 N25 LG LlOOK RO

DESCRIPTION

resistor

I0Z

, Var iab le

-31

-

TX

-7430

P502

P502

SPEAKER SWITCH PC BOARD

VOLUME

CIRCUIT

Q8 10

809

C

C818

R35 1, R4 51 5

P351 20 00

PC

BOARD(NAAF

NO.

PART

, C8 17 354

222963

3547803

104200

NO .

7803

39 3.3,uF, 50 V,
39 3.3,uF ,

635

·2872

·1)

DESCRIPTION

LB

1630

, 1C

Eke

50V
N16
rcs ist or , Vol u me
NSAS-4P5

, Elecl. ca

RGM50KA30F, Variab

91,

Sock e t

l. capa citc rs

pac

ito r

SPEAKER

le

TERMINAL

~

0

o N

~

PC BOARD

VOLUME

CIRCUIT

D81 0 2

SPEAKER

CIRCUIT

L50 1, L601 231 001 S-1.3 B, Co ils
R51 7, R61 7 44 2 5204 74 4. 7ohm,

R51 8, R61 8

S50

502

P

SPEAKER

CIRCUIT

P501 25

INDICATOR

NO.

PART

NO .

252

19 S LC-2 2U R4!'", L.E.D

272 701

SWITCH PC

NO.

PART

NO.

441

62 3

2,

S50

3 250 35 51 7 NPS

504

51 39 HLJ-0540-0 1-01O,

2

TERMINAL

NO.

PART

NO .

060

093

PC

BOARD(NADIS

DESCRIPTION

03A

914

Space r

BOARD(NASW·2876-1A)

DESCRIPTION

1/2

film res

isto
390 ohm, 1W, M
film resistors

-222

-L47 9, Push switch

eadph

one

h

PC

BOARD(NASW·2877

DESCRIPTION

NTM·8PDM

-2874

·1)

W, Me tal o xid c

rs

etal

oxide

Ste

termi nal

L34 , Spc ak er te rm ina l

reo

-1A)

-32-

VOLUME

PC BOARD

DISASSEMBLING PROCEDURES

1.

Top cov
Remove a screw holdi ng th e
Rem ove th e four s

2.

Fron
Remove
Rem ove the six screws ho lding th e

3.

Bot
Rem ove th e to p

Rernove th e five
Rernove

Rernove th e two scr ews 0
Rernove th e t

er

t pan el

the

to m

the

crcw

top

cover.

boa

rd (C hassis)

cov

er an d th e

screw

four

screw s ß an d

hree

screw s E onth e A

s hol

s A

top

din

g the ba

fro

holding

the

hol

ding

cover

and

th e ba ck pa nel.

ck

paneland

fron

t pa ne l an d the fro nt

n t

pan

el.

the ba ck pa nel arid the c

two

screws C.

the

cha ssis

M/FM

tun

the cha ssis.

(See

and

the

er pc board ,

Fig . 2)

front

brac

hass

brack

(See

ket.

is. (See Fig. 1)

et.

(See

Fig.

Fig . 3)

2)

4. F ron t br a
Rem ove th e
Rernove
Rerno

cket

bot

tom board

th e br

acket

betwee

ve the two screws F . (S ee Fig. 2)

0

(Ch

assis) .

n the

@I

V

front

bra

cket

and

the

radiator.

o"

b 0

°0

Ofl

P0

0000

O,p 0 o,p

0

I@

@

0000

0

@

@

~

\j

(Fig. 1)

C=:=)O

r

FR ONT END

@

/

@

>

®-

0

C

(Fig. 2)

.>

@

0

0

- 33-

(Fig. 3)

TX-7430

ONKYO

International Division: No 24 Mori Bldg., 23-5, Nishi-Shimbashi 3-chome, Minato-ku,
TOKYO 105, JAPAN Tel: [phone] Fax: [phone] TLX 242-3551 ONKYO J

ONKYO

Industriestrasse

Tele

DEUTSCHLAND

18,8034

x: 41-521726 ONKY. Tel. [phone]

CORPORATION

GmbH

ELECTRONICS

Germe

ring, WEST GERMANY

- 3

4-

PN OM 3258 A 7

03

Printed in Japan