Kenwood KA-7090-R Service Manual

KA-7090R

SERVICE

Knob

(K29-3759-14)

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MANUAL

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Knob

(K29-6391 -04)

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.__ I

"'l

Knob (K29-6390-04)

/::\-

r

(

)

@

[_ri

@

Knob

(K27-2176-04)

jack

Phono

(E63-0099-05) (E11-0293-05)

\d

Miniature

jack

Phono (E63-0098-05)

phone

jack

Phono

(E63-01

Slide switch

(s62-0034-05)

jack

Phono (E63-009e-05)

jack

02-05)

Dressing (B0s-2972-1

plate

3)

Screw terminal board (E70-0063-05)

Knob

(K29-3759-14)

AC outlet (Eo3-)

Power

cord bushing

(J42-0083-05)

-

AC

(E30-)

power

cord

-

*

\'rl

Refer to

parts

list

on

page

26.

Accessories

CONTENTS

ACCESSORIES

/

Battery

cover

(A09-01

70-08)

Batteriee........................

6ffit'-'

.....(2)

DISASSEMBLY

FOR

REPAIR

HOW TO

1. Remove 5

2. Remove

Remove

3.

4. Remove bottom

5. Lift unit

Replace

6.

REPLACE

screws

left side screws panel

to arrow direction(@).

power

(@)fixing

top screws

screws(@),

transistors.

Oxq

q

,."'

\ur

\ l\--

--\-

POWER

pcb (X09).

audio

(@).

panel

(@),

rear screws(O)

(Power

f-\

TRANSISTOR

bottom screws(@)

and bottom

transformer is bottom

and plate.

fram

side)

screw(@).

G)xt3

@xz

@xs

t*

Oxs

*4

7

sN\J

@xz

tt*

g-

rcl

gxt

CIRCUIT

DESCRIPTION

1. FUNCTION

(1)FEATURE

AUDIO

REC OUT

DIRECT

LOUDNESS

MD/MONITOR

REMOCON

SYSTEM

MOTOR

.

HEADPHONE

qPEAKEE

BACK UP

MODEL

2.

CONDITION

Po-r1

(MODEL)

INITIALIZING

3. lnitializing

.

3-1

.

3-2.

lnsert

in

is After

*

x

*

INITIAL

AC

the

backup

the

microcomputer

the

ON/STAND_By

lf the

oN/sTAND_By

lf the

pull

out

INPUT

CONTROT

VOLUME

lH L

]L

FUNCTION

OPeration

power

state.

power

AC

the

STAGE

(set

-

Japanese

K's is

qo!LPo1K4-7oqqr)

I

powER

the

is reset,

key key

(set

set

pressed,

is

pressed, check

not

is

powER

the

TAPE,

r't

key

port,

the

perform

onlY.

market

coMPo(KA-7090R)

MD, CD,

TAPETMD,

CD,

AUX,

TUNER,

AUX,

SOURCE

MD*TAPE

a.')

X

.J

(8/16)

o

ÄletA+B/oFF

initialization

for

oN)

to

RAM

the

whether

oFF)

and

to destroy

modes,

key

TUNER,

PHONO

DIRECT

while

register,

ALL CLEAR

the system

the backup

PHONO

H'L

SERIAL

KAF-7002

pressing

then check

operation

in the backup

is

PORT2

8 bit

the

each

for

data

SOURCE

A lBl

(SERIAL//MODEL)

oN/srAND-BY

key'

initialization.

state.

pressing the

while

*

K's

DIRECT

CD DIRECT

rl

o

a.)

fl61

i.r

()

a_)

A+B/OFF

a_)

key even

oN/STAND-BY

if the

system

key'

BACK

4.

WHEN STAND-BY

NO

2 3

4

6

7

UP

I

ON/STAND-BY

SELECTOR

INPUT

REC OUT

LOUDNESS

DIRECT SOURCE. MD/MONITOR

DATA

DESIGNATION

SELECTOR

INPUT

LOUDNESS

DIRECT SOURCE. MD/MONITOR

MUTING

DIR

srlrcron

coNDlTloN

ON/OFF

tirture

CONDITION

coNDlTloN

SELECTOR

CONDITION

CIRCUIT

DESCRIPTION

brr

t

\.\-

TEST

5.

5-1.

(1)

Setting

.

(2)

Canceling

.

To the

(3)

Contents

.

The

test mode.

turned on

.

the

(4)

Automatic

.

tion whenever

and

.

sequentially. and CD 7090R,

.

when the selector

(5)

Special

-

the display

.

When

MODE

Test Mode using

test mode

the

Turn on the

key.

initialize the system and cancel

power.

muting during mode selection

The speaker

normal operation.

POWER ON state

The

"LOUDNESS"

activated

ln the all-lighting

power

the

of test

is the same as

POWER ON

mode

test

mode

However, the operation

protection

the

key.

in the all-lighting

mode,

For KAF-7002/5002,

DIRECT display

the SOURCE

A and B display

SP

light.

The all-lighting

unit' s

keys is

operation

"LOUDNESS"

(a)

When

lights and

LED

After 16 seconds,

onds.

(b)

When this

operation

the electric

and

16 seconds,

goes

LED (c)

When

the LOUDNESS

volume stops. (d)

The operation

pressed

is

in steps

ation

pressed.

pressed

key is

down.

mode

pressed.

is set to TUNER

key

key is

this

the electric

goes

LED

key is

in step

(a),

volume

the electric

off.

this key

is

display

in step

after

operation

(a)

to

The operation

while the electric

"SPEAKERA+8"

is

the KA-7090R)

only

B LED

the switch

(for

Main

Unit'

pressing

while

for

the

operation

is

entered

power

is turned on

functions

All

the

mode.

the selector display

LEDs

DIRECT display

LEDs

do

is

canceled

The normal display obtained

pressed,

volume

the electric

off.

pressed

the LOUDNESS

turns down

volume

pressed

(c)

LED

(a)

in

step

is

repeated

during

is carried

is not canceled

position,

to this

set

Keys

s

"LOUDNESS"

the

mode,

the

turn off

in the.

power

test

the

is

not controlled

when

normal operation.

is

the same as

also

for model discrimina-

pressing

while

then initialized

are

LED

lights

the SOURCE

light

alternately.

LED

not light. All other

when any

then appears.

DIRECT

For KA-

lights. The

LEDs

of

the main

the LOUDNESS display

turns up

during

forI

stops and

operation

goes

off and

(c).

After that, the oper

every

volume turns up

lights

and

for 16 sec-

volume stops

operation display

6

out

even

the

or after

LED

seconds.

display

the

in

step

the

electric

when

this

time this key

if

another

SPEAKER

the audio mut-

and

lights

After

and

for

the

(b),

key

A +

is

'

5-2. SerialTest

(1)

(2)

(3)

is

ing

is turned on.

tion,

the LED

.

"MD

MONITOR

When this key

and the

pressed play

.

'ATT.

When this key

ATT.

REC muting is turned on

to ON. When this

muting is canceled and

.

"REC

When this key

the REC

canceled

ing is

.

"8/16-bit

The

set to the

audio

again,

goes

LED

-30d8

OUT"

OUT

until

canceled

selector

system enters

8-bit

When the switch is set to another

goes

" key

off

" key

pressed,

is

muting

the

audio

off.

(for

pressed,

is

and

(for

is

turned

muting is turned off and the dis-

only

is turned on during

while pressed

key is

the

(for

key

this key

only

pressed,

is

mode

if it is on when the operation

switch

set

pressed

is

"

the all-lighting

position

when

all-lighting mode is canceled.

is

code the test mode

"0800"

tion). The

is

set

to the

pressed.

at that time

output

is

activated

when

is output

all-lighting

16-bit

normal display then appears.

The

it is activated in the

mode

position

Mode

mode

Setting the

.

The is received only

After cases, the serial

"C27FH"

Canceling the

.

The serial test

code is received.

ized. The

tion.

.

When the AC

test mode

Contents

.

The

analyzed

.

ln

the test

inpuVoutput selection

er,

same as for the

.

The the serial communication

play

test

mode is entered

test

serial

when

that, only

serial

the

operation

speaker

normal

mode.

the 16-bit

is received.

code

test mode

serial

power (main

is

canceled

mode

of test

code for a

processing.

for

mode, no mute signal

normal operation.

protection

operation.-

the KA-7090R is in the 8-bit

test mode is entered

mode is canceled

ln this case, the system

code also

and

test shown

time during

when

the

operation

The

is validated

posi-

the audio muting is turned off.

KAF-7002150A2)

only

MUTE

the

on.

KA-7090R)

display

When

LED lights

key is

this

the ATT. LED lights and the

normal

the REC

again, the ATT. or REC

ATT. LED

KA-7090R)

the REC

to

ON.

(for

only

the ATT. key is on after the

operation. The

mode is set

OUT

goes

off.

LED lights and

OUT

The operation is not

again.

The REC mut-

KA-7090R)

mode

if this switch is

is

canceled.

The serial POWER ON

(code "25H

in the 8-bit

is

canceled

again or

mode

remains set to

power)

the system is initialized.

power

code

" is

position,

when this

when the ATT. key is

if

a serial

"71H"

output

and code

16-bit

when

switch

mode.

is accepted. ln other

when

a serial

"C27FH"

a

when

initial-

is not

the 16-bit

is

in

is output to shorten measurement.

is

input in the test

irrespective of the

turned

the

is

turned

also

off, the serial

attached

on is the

the

same

mode by

Howev-

as for

posi-

code

posi-

list is

dis-

the

.

all-lighting

The

cancel

appears.

.

ln the

sequentially.

CD

and

7090R,

LED

ER

.

REC

The

the selector

of

KA-7090R).

only

.

main

The

mode.

test

this case.

.

operation

The

tained

teed.

.

REC

The

mode

code.

all-lighting

the

in

After

mode,

KAF-7002/5002,

For

SOURCE

not

selector

OUT

after

s

unit'

However,

when

muting

display

light.

a

keys

the

is canceled

DIRECT

does

the corresponding

canceled

is

cancellation,

selector

the

light

LEDs

operated

is

MODE

be

operation

code

model

by

LED

LEDs

pressed even

having

MUTE

DIRECT

All other

REC

can

the

CIRCUIT

all-lighting

an

using

normal

the

display

the SOURCE

alternately'

lights'

light'

inputting

by

code

ON

not

is

function

a

input

is

ALL

display

LED lights

DIRECT

For

SPEAK-

The

the code

is input

in the serial

guaranteed

not

guaran-

not

is

OFF'

DESCRIPTION

KA-

(for

in

con-

I

r6

d

l

'llt,

Microprocessor

6.

(K's

KAF-7002,5002)

(KA-7090R)

periphery

CIRCUIT

block diagram

DESCRIPTION

LED DISPLAY x 13

SELECTOR LED

/RELAY CONTROL xG

REC

A.T.T. LED x 1 ON/STANDBY LED x 1

LOUDNESS LED x 1

S. DIRECT LED x 1 SP RELAY x 2

DISPLAY x 14

LED

OUT

LED x 1

L

POWER ON x 1

AUDIO MUTE x 1

HEAD PHONE x'l

SERIAL x2

DATA, BUSY

MOTOR

AD

VOL

UP/DOWN

x3

INPUT

KEY

sP sw

INPUT INPUT

|NPUT

(ROTARY (ROTARY

SW)

:

@

N

5

N

:

1>

6ö

@

gD

Tal

SELECTOR MD/MONITOR LED x 1 MUTE LED x 1 ON/STANDBY

LOUDNESS LED x 1 DIRECT LED x2

SP RELAY x 2

(K's

KAF-7002,5002)

DIRECT ENCODER

!

PROTECTION

LED x

LED

6

1

x

x2

x 1

RESET x 1 CE

x1

q'.

\-

SELECTORIC

DATA, CLOCK,

TC9162 TC9164

SELECTOR

.

(FUNCTTON

(REC

DATA,

(TC916X)

BUSY

cLR, STB(NJU3711)

TC9162 TC9164

NJU3711(tNPUT SEL SW)

x3

BUSY

OUT SW)

lC x5(KA-7090R)

CLOCK

(FUNCTTON

(REC

OUT

(K's)

SW)

DESTINATION

COMPO/K's 8/16 bir

DESTINATION x2

COMPO/K's

KAF.7OOA5OO2 DISCRI M I NATION

x 2

DISCRIMI NATION

CHANGE

OVER(KA-7ogoR)

DISCRIMINATION

(K's)

Microprocessor

6-1.

CIRCUIT

connection

DESCRIPTION

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vz

-c)

cä\

o):

-o

o*

.F(U

=a

eb

N

z

a

F

U) IU

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CI:

-(s

tro

o-

e(s

=o

:d)

co

l'..

f

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z

uJ

f-

a

ffitttttttttt

30

tEz

LIJLI2^

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q

9I

r.rJLUfiöCr

ttrtrtr öo

öa

e

il

ulu

o-

z

zo

e

E FlH

2-= LUOr ECC

lllll

u:

u:9

g

^L

Yt

><

ß-z=

9\JÖN

(or)

e

lFz-zz r::4

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z

96

gffi

=

FÖ

=

ad

IU

o

-

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ul

o

n M

47

7

M 3

llllllil

rrrLLl{>A=

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3?44de

o:aa>cc

aäccccqP

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4-ar5=

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o=ccccEy

J

Ul Ul Ul

()

4=arb=

=[

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4

ltil

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P

s

llittl

tL l- .^

Y=-eE

tLF-.^

uZ)Yl

g=gyi

EE

TLU

nä

-J

Tffi

3

CIRCUIT

DESCRIPTION

\Y

l6bit

serial

test code

(C2XXH)

L

|-

lTFIil

:

Receivins

code

Microprocessor

6-1.

CIRCUIT

connection

DESCRIPTION

aai\ tr

\t Z

lo(

61o

(Ö) r-i O

-z

:1 I

<\O

tr4

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=-E

-(B

to

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sb

c!

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a'\

F

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ul

o

tr

ul

(o

ö

I I

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v

g0)

lx

rlo

lo

l<

rttttttttttt

o)

c

.F

E

c

:

E

o

E

I

c

-c

Lcr

l0

Itil

c-:

I

Itr

tl

lo

la

q;

E

o

E

(g

o

($

I

(!)

o-

s9

GCCT

trlul 7Ä

lcc

t-

to lö

IO

N

l

-

z

uJ

F

a

ooä=-

I

a tlu

LU

l!

fi bLcc

tr.88tr. öoL

6A

L,LF

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e2a

fr68

trE

lllll

il

z

E

(L

H

u:

g

lrll

l+++

2=

V^

tr

LUr)\JnN

@

I

lJ\z>z

-taFOcc

F+Ao-J

t:1

-e

4 6R

I.JJ

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==?

F: E

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o

:! sfi

><

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t @

4

M

n

17

7

3

Nil

lil

il

rrrLil{>^l

=ztax

o:<a>q

=?a4de

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oäccccccY

fuJulului\

4-ar5=

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5ioc0:Y

s:ii5q

oUcEEccg

:)rxululL,):,\

4-arb=

lltil

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=o-lr

P

S

5

lllttl

fr259Q

g=9;j

F

XE

Xo

tL

af

üo

I

Tffi

KA-7090R

--::.-:-:-

6-2.

NO.

2

4

--

connection

con

n

DESTINATION

COMPO

K:

5

6

HEAD

7

I

10

11

12

13

14

'.

GEI

tf,

lo

-

17 18

'19

20

21

l3

24 c4

-FnorrcrtoN

to

27

-IrygTY\-

28

29

30

31

NAME

POWER

COMPO

AUDIO

ON

CLR

NC

K's

REE

N/9ry191

y9

MUTING.3O

MUTE

OUT

PHONES

onrn 1

-s

BUSY

S

V DOWN

VUP

(TACT)

KEY

IC

tc

SEL INPUT

V REF

SEL

DATA

clocx

ST

IC

SEL

SPEAKER

SEL

XIN

X OUT

VSS

vcc

N/C

Utr

RESET

SOURCE.DIR

eni ;Datr nlFl a

SPB

SPA

CIRCUIT

r/o

1

COMPO/K'S

POWER

DISCRIMINATION

RELAY

DESCRIPTION

PORT

ITHMII\AL

H : COMPO

NN

L:K's__

L:OFF

-o

o

o o

o

oUTPUT

'MUTING"

o

HEAD

o

1

l

I

SERIAL

r/o

SERIAL

tlo

VOLUME

o

VOLUME

o

krv

(A/D)

r

[rrv rttpur-runrtrltrunl

f-

(A/D)

r

i sElrcron

o

t-_-

SELECTOR

o

SELECTOR

o

(A/D)

INPUT

|

I

P/D

LI

1t

I

OSCILLATOR OSCILLATOR

GND

+5V

NOT

MICROPROCESSOR

I

B

I

O

SIGNAL

PHONES

DATA

BUSY

DOWN

UP

TERMINAL

rr.rrur

SPEAKEH

SELtrt/

tc

IC IC

sELEcroR

REFEBENCE

USEIJ

SIGNAL

RESET PROTECTION

REMOTE

COMPO

r.

COI\4PO

coNIlgL

+

äornnv

+

CONTROL

SIGNAL

DArA

CLOCK STROBE

VOLTAGE (8MHz) (8MHz)

INPUT

DETECTION

NOI

ENcoDER

NOT

-rI^AN-D

o

TERMIryAL

TER]\NINAL

OUTPU

- --

UU

lUh

INPUT/OON

sw

CHIP

ENIVIII\AL

I

----:

I

II-U

I

rr\TU

ENABLE

TERMINAL

NP{rtRMIlt

UstU

USED

sIGNAL

B

CTI:NIAI II\IPI IT TFRMINAL

^

IEHIVIII\AL

I

IHoL

INPUT

5-1!Y,

-

5

----

ltF{rvrrr\A'-

_

TERMINAL

s

KEYS

(KA-7oeoR)

(K's)

H:ON

HrowN

H:IDATA H:IDATA

ENABLE

:

H

H.ON

ol.F

!

.OTHER

I

L:oTHER

.) NATA

L:ODATA

L:OFF

10

32

JO

34 J5

JO

37

ea

39

40

41

42

x',

DIR

CD

SOÜRÖE

IOÜDNESS

ONiSTANDBY

INPUT

coMPo

DIR

TAPE

MD CD

AUX

TUNER

PHbNO

8/16

ofsfrr.rnior.fz

o

"ULJ,LJIh

K'S

SOURCE.DIR"LED

irouoNESS"

"ON/STANDBY"

'-Oq"

"MD" "CD"

üux'

ituueR"

U

t_,,

I

CON

coNTRoL

LED

UUN

LID

1 trN/RtrI AY CONTROL

LED/RELAY LEDiRELAY

leonrlAY

CONTROL

LED/RELAY

coNTRoL

I HUL

IFI(JL

I trI-{IVllIUL

TERMINAL

I trNIVIII\ÄL

TERMINAL

TERMINAL TERMINAL

TERMINAL

r.r.oFtr

H:OFF

H L'FF

H:OFF

L:ON

ON

L

L ON

L:ON

L

'16

rni-sooz

*/

,{l,

Unless

otherwise

POWER:

specified,

ON

the individual

SPEAKER:

Connect

voltmeter

(x0e) (A/3)

(a)

ADJUSTMENT

switches

should

B REC

DC

a

between

(L)

5

cN

6(R).

cN

DC VOLTMETER

be

set

as following:

OUT: OFF

vR1,3 vR2,4

(xoe)

(L)

(R)

(A/3)

17"6 mV

t

\r/

t

CONNECTOF

\

NO. \

1,2 4121,123 Q122,124

3,4 Q125,127 Q126,128

cN5

(L)ch

IDLE

CN6

(R)ch

IDLE

t

PARTS

DESCRIPTIONS

CAPACITORS

Type ... ceramic,

1

=

2

Shape...

=

Temp. coefficient

3

=

1st Word

Color*

pom/"c

.

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KENWOOD

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PTE LTD.

99544

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(A

c.N.0014ss 074)

Dan:l

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Kenwood KA-7090-R Service Manual

Specifications and Main Features

Frequently Asked Questions

User Manual