Kenwood Kr-a5010 User manual

KR-A5010

KENWOOD

SERVICE

MANUAL

©

1989-4

PRINTED

IN

JAPAN

B51-3895-00

(O)

2713

Panel*

Front

glass*

Metallic

cabinet

Knob

ass'y

(A20-)

(B10-)

(A01-1746-01)

(K29-3581-04)

Phone

jack

Knob

Remote

controller

ass'y

(E11-0162-05)

(K27-1987-04)

x

2

(K29-3632-04)

(A70-0264-05)

Phono

jack

Miniature

phone

jack

Slide

switch*

(13-0446-35)X2

(E11-0188-05)

($31-3010-05)

Binding

post

Terminal

board

AC

outlet*

Power

cord

bushing

(N08-0128-35)

(E20-0823-05)

(E03-0107-05)

'

(J42-0083-05)

ATTENTION

CAUTION

St

wereucrion

wexust

8

CORRECT

ETT,

ATTENTION

7002

ws

tai

ast

one

$i

eemarin

ay

o

ase

TION

TOS

Lock

terminal

band

*

Phono

jack

Foot

AC

power

cord*

(E20-)

(E13-0820-05)

(J02-1013-05)

x

4

(E30-)

Slide

switch*

Slide

switch

($31-2132-05)

($31-2136-05)

*Refer

to

parts

list

on

page

42.

~

KR-A5010

CONTENTS/LISTENING

TO

BROADCASTS

CONTENTS

LISTENING

TO

BROADCASTS

...........:ccssssesscsessenees

2

6.

CX7925B

:

PLL

(X14-253X-XX

|

1C2)

........

cess

19

REMOTE

CONTROL...........:ccsccssscesesccecssersseeessssenseees

4

ADJUTIMENT

vissesscccscsccccassscarcocsciisiestsevsssvanecauronsess

20

DISASSEMBLY

FOR

REPAIR

...........-::::sssssessesseeeeees

5

REGLAGE

sss

ccsisccsscsscstesesiescvsticapcatetzvasenivedeSeccasasuvsse

21

BLOCK

DIAGRAM

............:cccssesesccsecensorseeenerenenseseneees

8

ABGLEICH

eos.

ccicciseisacccsesscteseedeethcesaidttdiveisccees

22

CIRCUIT

DESCRIPTION

ADJUTMENT/REGLAGE/ABGLEICH

.................5

23

1.

Description

of

components

...........::csssessssseeens

8

VOLTAGE

TABLE

..........ccscsscsesssscenseesecesseenenenseseoes

24

2.

CXP5016-330S

PC

BOARD

(COMPONENT

SIDE

VIEW)

...........+++

25

Microprocessor

(X13-619X-XX

:

ICS)

............0..

10

PC

BOARD

(FOIL

SIDE

VIEW)

...........csseseccesceeneers

29

3.

STK4201/2

:

Main

amplifier

SCHEMATIC

DIAGRAM

.........ccscsssessccersseesseetsornsnees

33

(X14-253X-XX

:

1C7)

:

K,

P,

U,

UE,

M,

X

type

...17

SCHEMATIC

DIAGRAM

...........ceccscsessssereseseeeseees

37

4.

STK4201/5

Main

amplifier

EXPLODED

VIEW............:-..cccssscsssssseseesssseseeeeseenenees

41

(X14-2532-71

:

1C7)

:

E

type

.......ceesccsecsssceeeeeeees

17

PARTS:

UIST

ii.cccsecs

teas

snsctes

tices

wsteceuai

saveeatigs

sceassennnen

42

5,

AN7470

:

FM

MPX

(X14-253X-XX

:

1C3)...........

18

SPECIFICATIONS

............:scssesssesesesens

BACK

COVER

LISTENING

TO

BROADCASTS

This

unit

allows

both

the

frequencies

and

the

names

of

broadcasting

stations

to

be

preset.

When

a

station

is

recalled

by

preset

tuning,

the

display

shows

both

the

frequency

and

the

name

of

the

station.

(S.N.P.S.)

Preset

function

{1

-

10/11

-

20)

key

Numeric

(1~0/10)

keys

DIGIT

key

MEMORY

key

CHARACTER

key

TUNING/CHARACTER

keys

:

£

displ

h

ith

th

@

To

preset

station

names

and

frequencies

TUNING/CHARACTER

key

bie

.

(The

station

names

can

be

displayed

only

with

station

preset

in

CH

1

to

CH

10.)

Every

time

the

UP

segment

of

the

TUNING/CHARACTER

key

is

Example

1:

To

preset

the

91.50

MHz

FM

broadcast

pressed,

the

displayed

character

is

varied

in

the

following

order:

frequency

and

its

station

name

“WNY"

in

AB

Oo

Ze

Oe

1

2

Brees

9

preset

chane!

number

2.

Blank

(Pressing

the

DOWN

segment

varies

the

displayed

character

in

the

reverse

order.}

1.

Tune

to

91.50

MHz

FM.

2.

Press

the

CHARACTER

key.

Press

the

TUNING/CHARACTER

key

to

select

“W".

Press

the

DIGIT

key

to

set

the

character

and

move

to

the

paula

Press

the

TUNING/CHARACTER

key

to

select

“N”.

Press

the

DIGIT

key.

STEREO

TUNED

AUTO

FM

oo

2

IN

Nite

Sch

aateomee

KR-A5010

LISTENING

TO

BROADCASTS

sl

Press

the

TUNING/CHARACTER

key

to

select

“Y”.

8.

Since

the

fourth

column

should

be

left

blank,

press

the

DIGIT

key

twice

or

press

the

CHARACTER

key.

9.

Press

the

MEMORY

key.

10.

Press

numeric

key

2”

to

select

preset

channel

2.

Frequency

display

TUNED

AUTO

EQ.ON

indicator

*EQ.ON®

AM

sence!

LV

to

ae

Hedy

|

lad

CH

came

UN

TAPE

2

indicator

Reset

channel

display

Station

name

display

@

To

change

a

preset

station

name

Example

2:

To

change

the

name

of

the

810

kHz

AM

broadcast

memorized

in

preset

channel

8

to

"WGY".

1.

Recall

the

preset

channel

8

with

the

preset

function

key

and

the

numeric

keys

according

to

“Preset

tuning”.

2.

Press

the

CHARACTER

key.

3.

Press

the

DIGIT

key

to

move

to

the

first

character

location

to

be

changed.

4.

Press

the

TUNING/CHARACTER

key

to

select

“G”.

5.

Press

the

DIGIT

key

twice.

6.

Press

the

TUNING/CHARACTER

key

to

select

a

blank.

7.

Press

the

DIGIT

key

or

the

CHARACTER

key.

8.

Press

the

MEMORY

key.

9.

Press

numeric

key

‘’8”

to

select

preset

channel

number

8.

~

KR-A5010

REMOTE

CONTROL

HCD

player

control

keys

DISC

SEARCH

These

keys

allow

the

same

operations

as

the

keys

with

the

same

names

on

the

CD

player.

The

DISC

key

is

for

use

exclusively

with

a

multiple

CD

player.

Pressing

the

DISC

key

allows

one

of

DISC

1

to

DISC

6

to

be

selected

in

the

following

cycle.

DIS

Se

2

3

+

4

+

§

6

P

(DP-M6010

only)

@

Tuner

control

keys:

TUNER

P

SCAN

These

keys

allow

the

same

operations

as

the

keys

with

the

same

names

on

the

receiver.

@

TAPE

B

deck

control

keys

TAPE

B

See

oe

Be

Tm

These

keys

allow

the

same

operations

as

the

keys

with

the

same

names

on

the

TAPE

B

deck.

Note:

When

the

Fast

Forward

key

is

to

be

pressed

after

the

Rewind

key

was

pressed,

press

the

Stop

key

first.

then

press

the

Fast

forward

key.

M@

Input

selector

keys

PHONO

TUNER

TAPE!

TAPE

2

VIDEO

1

VIDEO

2

|

These

keys

have

the

same

functions

as

the

input

selector

keys

on

the

receiver.

@

POWER

key

_)

@

Equalizer/Surround

key

OO

SURROUND

EQ.

key

has

same

function

as

EQUALIZER

key

on

the

receiver.

|

The

main

body

is

not

equipped

with

the

OD

Surround

function.

Therefore,

the

QQ

SURROUND

key

causes

no

effect

even

when

it

is

pressed.

@

Turntable

(PHONO)

control

keys

PHONO

The

Play

()

and

Stop

()

keys

are

provided.

HB

Volume

level

keys

5

ete

MAIN

VOLUME

keys:

Pressing

the

[A]

key

rotates

the

VOLUME

CONTROL

on

the

main

body

of

the

unit

clockwise

to

increase

the

volume,

and

pressing

the

[V]

key

rotates

it

counterclock-

wise

to

decrease

the

volume.

MUTE

key:

The

MUTE

key

is

not

provided

on

the

main

body.

The

muting

can

be

controlled

only

from

the

remote

control.

To

mute

the

sound

temporarily

Press

the

MUTE

key

on

the

remote

control

unit.

@

The

point

indicator

on

the

MAIN

VOLUME

CONTROL

knob

blinks,

and

the

output

sound

is

muted.

@The

muting

is

canceled

when

the

MUTE

key

is

pressed

again

or

the

MAIN

VOLUME

UP

or

DOWN

key

is

pressed.

@

When

the

muting

is

canceled,

the

point

indicator

on

the

MAIN

VOLUME

CONTROL

knob

stops

blinking

and

starts

to

light

steadily.

—

QO

SURROUND

£0

cD

SK

eo

ee

Be

TUNER.

as

FN

ee

oe

TAPE

@

Se

oe)

Io

CO

PHONO

TUNER

TAPE

7

TAPE

2

ViOEO

1

viDEO

2

KENWOOD

REMOTE

CONTROL

UNIT

AC~6010

In

case

any

of

the

following

models

is

used,

the

CD

manual

search

cannot

be

operated

from

this

remote

control

unit:

Switches

the

power

of

the

receiver

to

ON/STAND-BY

DP-M97,

DP-57,

DP-47

(OFF).

KR-A5010

DISASSEMBLY

FOR

REPAIR

Befor

repair

work,

take

out

the

case.

1.

Remove

the

five

screws,

then

detach

the

front

panel

(@).

2.

Remove

the

two

screws,

then

undo

the

catch

of

the

sub

panel

(@).

3.

Remove

the

one

screw

(

@).

4.

Undo

the

catch

of

the

PHONES,

then

detach

the

PHONES

board

(X14-)

(B/3)

(@).

5.

Detach

the

knob

using

a

screwdriver

(@).

Undo

the

catch,

then

detach

the

knob

ring

(@

).

Undo

the

catch

of

the

VOL

LED

(@).

Disconnect

the

LED

leads

(

@).

Take

out

the

hexagonal

washer

of

the

knob

(@).

eo

ONO

KR-A5010

DISASSEMBLY

FOR

REPAIR

10.Remove

the

six

screws,

then

detach

the

display

board

(X13-)

(A/11)

(@).

11.Undo

the

13

catches

(@).

When

repairing

or

checking

the

main

PC

board

and

power

supply

PC

board

refer

to

the

following

steps.

1.

Remove

the

five

screws

(

@).

2.

Remove

the

eight

screws

(@).

KR-A5010

DISASSEMBLY

FOR

REPAIR

3.

In

this

way,

the

FM

terminal

mold

will

hit

against

the

chassis.

To

avoid

this,

lift

up

the

main

body

putting

aside

the

rear

panel

in

the

direction

of

an

arrow

(OO).

4.

When

picking

up

the

power

supply

block,

remove

four

screws

(@).

Note

:Be

adequately

careful

in

inserting

the

connec-

tor.

(X13

(B/

11)

soa

(X14)(C/3)

a

S&S

of

(X13

-619)

<|

(X14)(B/3)

(A/IN

2

t

SS

(X14-253)

(A/3)

S|

(X13)

(a7)

(XIS)CHZ11)

~KR-A5010

BLOCK

DIAGRAM/CIRCUIT

DESCRIPTION

Brock

diagram

Q1~4

a6

1C4

1c3

Bln

Eg

EP

Q7,8

1c2

1c4

PHONO

©

ala

es

ee

SELECTOR

co

©

(x)

“eS

f—PLaY

©

Lree

©

A

a

TP

an

[7

PLAY

©)

B

rec

©

|

PHONES

VIDEO1/AUX

©

vineo2

©

|

a

X14-2530-11

|

X14-2530-11

Circuit

description

1.

Description

of

Components

SUB

UNIT

(X13-619X-XX)

0-11:K,P

0-22:M,U,

UE

0-71:X

2-71:E

Ref.

No.

Part

No.

Use/Function

Operation/Condition/Compatibility

Ici

~3|

ANe554

Graphic

equalizer

amplifier

|

NJM2058D

pPC4574C

IC4

PST529C

Reset

ma

Reset

for

microprocessor.

|

IC5

CXP5016-330S

|

Microprocessor

IC6

LB1641

Motor

driver

For

volume

control.

=

44

IC9

a

NJM4558D

Buffer

amplifier

For

equalizer

amplifier.

M5218P

Q1

2SC945(A)(Q,P)

|

Reset

Tor

microprocessor.

2SC1740S(Q,R)

—

Q2

2SC945(AQ,P)

|

Buffer

amplifier

For

FL

driver.

2SC1740S(Q,R)

2SA733(A(Q,P)

|

Switch

Channel

space

selector

(M,

U,

UE

type).

2SA933S(Q,R)

=

DTC124EN

Indicator

drive

Point

of

volume

control

knob.

DTA124EN

Indicator

drive

Light

letter

in

FL.

_|

Q14

2SC2003(L,K)

[+

AVR

+5.6V.

2SB772

-

AVR

-30V.

2SC2320(E,F}

Relay

driver

Power

supply

ON/OFF.

KR-A5010

CIRCUIT

DESCRIPTION

TUNER

UNIT

(X14-253X-XX)

0-11:K,P

0-22:M,U,UE

0-71:X

2-71:E

Part

No.

to

Use/Function

Operation/Condition/Compatibility

2$C1923(R,O)

2SC1845(F,E)

Q8

2SC945(A)(Q,P}

2SC1740S(Q,P}

Q10,11

|

2SC945(A)(Q,P)

2SC1740S(Q,R)

Q12

DTCi24ES

Q13

Q14

DTC124ES

Q15

DTA114ES

Q17,18|

2SC2878(B)

2SA733{A)(Q,P)

IC1

LA1265

FM/AM

system

IC

FM

IF

amp

detection

and

contro!.

AM

mixing,

IF

amp

and

detection.

IC2

CX-7925B

PLL

IC

for

frequency

synthesizer

|

PLL

for

electronic

tuning.

IC3

AN7470

MPX

IC

MPX

demodulator.

IC4

M5218P-A

Equalizer

amplifier

Equalizer

amplifier

for

PHONO

(MM).

NJM4558D-A

IC5

LC7820

Input

selector

SW

Analog

switch

arrey

for

input

selector

switches.

IC6

|

TC9215P

GE

and

TAPE

1

SW

Analog

switch

arrey

for

GE

ON/OFF

and

TAPE

1

REC

OUT

ON/OFF.

az

\C7

STK4201/2

Main

amplifier

Main

amplifier

(2ch).

(K,

P,

U,

UE,

M,

X

type)

1C7

STK4201/5

Main

amplifier

Main

amplifier

(2ch).

(E

type)

pPC7812HF

Constant

voltage

power

supply

|

3-pin

regulator

for

the

+12V

constant

voltage

power

supply.

|

2SK241(Y)

RF

amplifier

High-frequency

amplifier.

(kK,

P,

U,

UE,

M,

X

type)

3SK73(GR)

RF

amplifier

High-frequency

amplifier.

(E

type)

Q2

28C1923(0)

Mixing

Frequency

converter.

|

Q3

2S5C1923(R,O)

|

OSC

Local

oscillator.

Q4

2SC1923(R,O)

OSC

buffer

OSC

OUT

(oscillator

output)

for

synthesizer.

Q5

2SK161(Y,GR)

OSC

buffer

For

local

oscillator

input

to

mixer.

(E

type)

FM

IF

amplifier

LPF

2SC1740S(Q,R)

Q9g

2SC945(A)(QO,P)

|

Buffer

for

L6.

(E

type)

Emphasis

switch

FM

+B

control

DTA114ES

FM

+B

control

AM

+B

control

AM

+B

control

Muting

control

10.7MHz

amplifier.

Low

pass

filter

for

PLL.

Low

pass

filter

for

PLL.

ON

for

75us,

OFF

for

50ps.

(M,

U,

UE

type)

TAPE

REC

OUT

pop

noise

prevention

during

switching

selector

switch.

Q26,27

2SA933S(Q,R)

Q20,21

|

2SC2878(B)

Muting

Main

amplifier

pop

noise

prevention

during

switching

selector

switch.

Q22

2SA733(A}Q,P)

|

Muting

control

2SA933S(Q,R)

Q25

2SA733(A}Q,P)

|

Muting

Main

amplifier

pop

noise

prevention

during

switching

power

switch.

2SA933S(Q,R)

2SC1845(F,E)

Protection

Q29

2SA733(A}(Q,P)

|

Error

amplifier

-12V

error

amplifier.

2SA933S(Q,R)

Q30

|

_

2SA733(AN'Q,P)

|

Constant

voltage

circuit

-12V.

|

2sa9s3si0,R)_|

2SD1266

Constant

voltage

circuit

-12V.

~

KR-A5010

CIRCUIT

DESCRIPTION

2.

CXP5016-330S

:

Microprocessor

(X13-619X-XX

:

IC5)

2-1.

Key

matrix

connections

©

KR

:

KEY

RETURN

+5V

VRUP

KRO

PX0

(4)

BESET

x1

O

S.

DATA

Vop

VFDP

8G

7G

CoH

Hee)

:

ks

Grids

4G

2G

1G,

9G

SURROUND

MUTE

$16

E

MONO

$15

EQ

ON/OFF

$14

DATA

$13

CLOCK

$12

LATCH

$11

VIDEO

1/2

$10

Seg

ments

POWER

s9

MUTE

1

$2

MUTE

2

$1

TAPE

1

S6

so

S7

VIDEO

1

$8

S.

DATA

$5

BUSY

$4

GND

$3

a

2-2.

Setting

of

destinations,

models

and

specifications

depending

upon

diode

key

matrix

The

setting

of

destinations,

models

and

specifications

is

made

according

to

the

initial

set

diode

key

matrix.

In

the

following,

''1''

means

''with

diodes"

and

''0"',

''without

diodes".

1)

Destination

set

SW

:

E

type/K

type

2)

Model

set

SW

:

AMP/RECEIVER,

V6010/A5010

Destination

|

Desti-

Reception

Chennel

|

Reference

Model

set

SW

Function

set

SW

|

nation

frequency

band

|

space

|

frequency

Dolby

Video

87.5

~

108.0MHz;

100kHz

surround

'

signal

f/O

K

530

~

1610kHz

efffect

530

~

1700kHz

KR-V6010|

Provided

4

r

87.5

~

108.0MHz

KR-A5010|

Provided

|

Not

provided

|

Not

provided

531

~

1602kHz

Not

provided

|

Not

provided

|

Not

provided

3)

Specification

set

SW

:

AM1700k/AM1610k

With

destination

set

SW

at

''0"

:

Effective

only

for

K

TYPE

Specification

;

set

SW

AM

reception

frequency

band

530

~

1610kHz

Saar

eal

530

~

1700kHz

KR-A5010

CIRCUIT

DESCRIPTION

2-3.

Explanation

of

terminals

Function

Volume

down

operation

control.

''H''

:

Volume

down

operation,

''L''

:

Normal

status.

Backup

(power

OFF)

detection.

''H’'

:

Normal

status,

''L''

:

Power

OFF.

At

power

ON,

an

"'H"'

signal

is

input.

When

an

''L"

signal

is

input,

the

clock

pulse

oscillation

for

the

microprocessor

is

stopped

and

the

backup

mode

is

entered.

When

the

signal

is

level

becomes

"'H"

from

"'L",

the

normal

status

is

restored

from

the

backup

mode.

Remote

control

signal

input.

Active

''L"’.

Key

return

signal

inputs.

‘'H'"

:

with

input,

"'L''

:

without

input.

Key

scan

signal

outputs.

Normally

''H''.

When

a

key

is

pressed

ON,

key

scan

is

performed.

Surround

effect

audio

signal

output

ON/OFF

control.

"'H''

:

Output

ON,

''L''

:

Output

OFF.

No.)

name

|1/O

Name

1

PY1

10)

VRDOWN

PY2

|

BACK

UP

3

RMC

|

REMOCON

4~141

|

PXO

~PX3

|

KRO

~

KR7

PDO

~

PD3

12

~

16)

PCO

~

PC3

|

O

KSO

~

KS4

PFO

17

PF1

O

|

SURROUND

MUTE

18

PF2

6)

MONO

Pra__|

0

20

PEO

oO

DATA

23

2

PE3

4

PBO

5

PB1

6

PB2

Compulsory

monaural

output

control.

''H''

:

Monaural,

''L"'

;

Stereo.

CX-7925B

(PLL

IC)/LC7820

(Selector

IC)

control

serial

data

output.

Data

is

latched

at

the

rise

of

the

clock

pulse.

CX-7925B/LC7820

control

serial

data

transfer

shift

clock

pulse

output.

Data

is

latched

at

the

tise

of

the

clock

pulse.

O

POWER

O

2

O

MUTE

1

Line

output

mute

control.

''H'’

:

Mute

ON,

''L''

:

Mute

OFF.

Data

latch

signal

output

to

CX-7925B.

Data

is

latched

particularly

at

the

rise

of

the

clock

pulse.

Video

signal

selection

control.

''H''

:

VIDEO

1,

''L''

:

VIDEO

2.

Power

supply

circuit

relay

ON/OFF

control.

''H'"'

:

Relay

ON,

"'L’'

:

Relay

OFF.

0

MUTE

2

TAPE

2

recording

output

mute

control.

''H'’

:

Mute

OFF,

"L''

:

Mute

ON.

TC9215P

(Selector

IC)

control.

TAPE

1

recording

output

ON/OFF

control.

“H''

:

Others,

‘‘L''

:

TAPE

1.

29

PAI

O

VIDEO

1

TC9215P

(Selector

IC)

control.

VIDEO

1

recording

output

ON/OFF

control.

"“H"'':

Others,

''L''

:

VIDEO

1.

Serial

busy

signal

/O.

32

Vss

GND

I

oO

ie)

57

VFDP

|

VFDP

INT2

|

5

59

INT1

|

60

XTAL

Oo

61

EXTAL

|

EXTAL

62

RST

|

RESET

63

PYO

ie)

VRUP

64

Vob

I

VDD

SDATA

Serial

data

input.

Shorted

with

30

for

use.

XTAL

Clock

pulse

generation

circuit

output.

FL

tube

segment

drive

signal

outputs.

FL

tube

digit

drive

signal

outputs.

(However,

grids

1G

and

9G

identical

with

each

other.)

FL

tube

output

driver

circuit

power

supply.

Unused

pin.

Shorted

with

Vop.

Clock

pulse

generation

circuit

input.

Reset

signal

input.

Volume

up

operation

control.

''H'’

:

Volume

up

operation,

''L''

Normal

operation.

Positive

power

supply.

11

~KR-A5010

12

CIRCUIT

DESCRIPTION

2-4.

Initial

setting

1}

Function

initial

setting

Last

channel

MEMOTY........cc

ce

ceeesseeeees

FM

:

87.5MHz

wibiee

att

soy

alter

aman

cette

e

ee

At

Me

AM

(kK)

:

530kHz

sees

stil

va

cosas

deacegeeyysaeedaiseeneeecsse

decades

AM

(E)

:

531kHz

Station

name

last

channel

memory/

station

name

preset

channel

memory

...........

All

blank

TUNING:

MODES

ecestaesecke

sek

ceoovicticedeseseedetecdsoutecetes

Auto

Preset

channel

memory

........

Chi~Ch20

all

at

FM

87.5MHz

Band

cclesaviuscecsies

cata

vesteidendccaeaees

ect

evan

asa

a

tieetedes

FM

oa

fd

4

0

er

I

1-10

INPUT

SClECTON

.ccasicasniiouiiescveeteencceariess

Tuner

VIdEO

MOMNITOF

00...

eeceeseceeecesseessenssseseessenes

VIDEO

1

Dolby

SUITOUNG

..........cccecccceseseeseccesseccssevesevsneeseres

OFF

EQUAIIZER

ivsccctsstaetetertagehededel

tetteicneceitidawes

DEFEAT

TAPE

2:

MOnitOl

s.icciceed

Sees

haerte

inca

neee

OFF

MUTING

ai

lee

cescsiehectiaiei

dete

avsaiesvieetsesssssivices

canes

OFF

POWER

ech

sescctcvectvsastunieauetcenlvsins

qeevattvaaomiaei

tote

cede

OFF

2)

Microprocessor

output

port

initial

setting

Any

figure

in{

—_)

is

a

number.

SURROUND

MURE

(12)

ssctsodetsnucectcekersstastt

rebayaattnty

LL

MONO:

(18)

(205)

sccsitte

tid

actetevetus

wupiieeteatenteutnrbieuithess

L

BO

ONIORR

(1S)

as

cseceseietstannsasabeuescadencrtevechrpenietsar

ante

L

WIDE

OT

Z

A

2S)

iscraitanattasiuns

stein

vei

ites

eatyentanccnencs

H

OVE

(26)

sieht

saetas

eats

cotaseet

us

acta

aa

pases

eaevid

L

18

70

as

|

ne

eerie

ee

nm

Cee

en

rT

H

RLS

ae

0

|

ear

nar

eeeter

teem

rear

ae

OE

SP

ee

ora)

H

TAREAD

NZ

Ax

scorsee

coreetne

test

tid

aura

uae

aad

uae

eaetuslars

H

MO

PAZ

Gyre

ssunnodetesltatanlee

tN

cau

hiouute

Basdans

ce

Senelagiieg

H

WROOWIN

1)

ccenstessensccmetacat

iheneativeretevareiavcre

ae

tientereds

L

Bd

a

(cic

|

Beene

meee

he

ee

aren

smears

ory

ener

are

tert

rnin

L

The

initial

setting

is

performed

in

a

following

event

:

1.

When

backup

memory

data

is

destroyed

when

reset

is

applied

to

the

microprocessor.

2.

When

the

power

cord

is

plugged

in

to

the

AC

wall

outlet

while

pressing

the

TUNER

key

or

MEMORY

key.

3.

When

serial

code

''TEST

:

71''

is

received

during

the

test

mode.

2-5.

Test

mode

setting

1)

Method

of

entering

the

test

mode

1.

While

pressing

the

TUNER

key

and

VIDEO

1

key,

plug

the

power

cord

to

the

AC

wall

outlet.

2.

When

the

test

mode

is

unengaged,

sent

serial

code

"71".

In

either

case

of

1

or

2,

when

the

test

mode

is

entered,

the

FL

tube

display

all

lights.

2)

Method

of

canceling

the

test

mode

1.

Unplug

the

power

cord

from

the

AC

wall

outlet

once.

2.

Send

the

reset

signal

to

the

RESET

or

some

other

means

to

reset

the

microprocessor.

3.

Send

serial

code

''71''.

inthis

case,

the

microproces-

sor,

when

it

receives

serial

code

''71'',

engages

the

same

state

as

when

initial

reset

is

applied.

Thus,

the

RAM

is

once

all

cleared

to

enter

the

initial

set

state.

3)

Contents

of

test

mode

1.

When

the

test

mode

is

entered,

the

FL

tube

display

all

lights.

This

all

lighting

continues

unless

a

effective

remote

control

serial

code

or

the

test

mode

is

can-

celed.

2.

The

test

frequency

is

stored

in

memory

for

each

preset

channel.

(For

each

frequency

to

be

stored

in

memory,

refer

to

its

associated

listing.)

3.

When

serial

data

is

received,

an

operation

different

then

the

normal

mode

is

performed.

(About

the

operation

of

each

code,

refer

to

the

serial

test

code

table.)

When

a

forbidden

code

is

received,

an

uncon-

trolled

run

may

occur,

so

that

proper

operation

cannot

be

ensured.

KR-A5010

CIRCUIT

DESCRIPTION

2-6.

Muting

timing

charts

(1)

At

power

ON

*

At

key

power

ON

KEY

IN

!

il

I

MUTE1

(25)

;

i!

\

|

1!

|

Pl

fa

'

MUTE2

(26)

7

\

{4

lg—500ms

SELECTOR

DATA

(20)

es

EE

cee

zal

'

‘

PLL

DATA

(20)

—

if

|

'

(

!

|

I

t

'

|

'

|

!

|

TAPE1

(27)

i

|

1

I

|

Ui

!

VIDEO1

(29)

|

ee

EQ

ON/OFF

(19)

MONO

(18)

SMUTE

(17)

‘

u

105ms

!

|

SERIAL

DATA

(30)

eit

(ab

sd

a

eerie

ee

|

POWER

(24)

cee

I

(

—rl1<—20~30ms

|

*

At

remote

control

power

ON

ine,

!

|

70ms

REMOCON

(3)

ee

AY

ga

eee

13

~KR-A5010

14

CIRCUIT

DESCRIPTION

(2)

At

power

OFF

*

At

key

power

OFF

'

MUTE?

(25)

<1]

MUTE

2

(26)

——

J

SELECTER

DATA

(20)

————_—_——_———_—$

—_—

PLL

DATA

(20)

TAPE?

(27)

VIDEO?

(29)

}

|

EQ

ON/OFF

(19)

71

MONO

(18)

!

|

SMUTE

(17)

t

Die

ee

SERIAL

DATA

(30)

!

POWER

(24)

«

At

remote

control

power

OFF

REMOCON

(3)

«

At

serial

power

OFF

|

SERIAL

DATA

(30)

(3)

At

input

selector

selection

*

Except

for

TAPE

2

monitor

MUTE?

(25)

MUTE2

(26)

\¢——_}__-500ms

|

i

I

1

|

!

.

—>—_<—

5s

Poa

heat

*

During

TAPE

2

monitor

key

|

ree

iN

|

MUTE1

(25)

cena

camel

i

aa

|

{

7

MUTE2

(26)

$e

rod

V4

~KR-A5010

CIRCUIT

DESCRIPTION

(4)

At

preset

channel

call

|

i}

I

{

MUTE1

(25)

SS

ry

Tt

|

a

1

I

f

1

12ms

|

i)

|

t

MUTE2

(26)

—

ae

ee

|

ly

I

1

I

it

1

|

i

|

H

I!

Pot

'

2.8ms

PLL

DATA

(20)

|

4.4ms

++

{eh

|

SERIAL

DATA

(30)

SS

rae:

Ms

|

er

Serres

(5)

At

preset

channel

scan

*

Without

station

MUTE1

(25)

1.

:

i

MUTE2

(26)

;

t

1

|

1

f

|

t

PLL

DATA

(20)

ee

Ne

¢

With

station

KEY

|

MUTE1

(25)

§

t

1

MUTE2

(26)

=a

as

a

ee

ia

1

|

5s

t

|

t

|

PLL

DATA

(20)

!

(6)

At

auto

tunin

9

Eye

25s

|

1

(2

.

MUTE

;

10ms

4O0ms

|

\

t

1.

1

i

MUTE2

(26)

a

;

5

00ms

Se

oe

{

1 {

|

{

PLL

DATA

(20)

nee

2)

Eames

(Co)

eee!

cre

eeeeeesee

mere

4

1

I

4

t:

Normally

125ms

;

SD

|

sb

sD

Band

edge

512ms

|

detection

15

KR-A5010

CIRCUIT

DESCRIPTION

(7)

At

mamual

tuning

*

When

key

is

pressed

simply

MUTE?

(25)

10ms

t

tl

\

1

|

PLL

DATA

(20)

a

)

a

es

«

When

key

is

held

pressed

KEY

;

KEY

ON->—7+—25ms

OFF

|

t

MUTE1

(25)

10ms

10ms:

10ms

|

1

'

ter

t

|

f

|

:

!

MUTEZ

(26)

—

4e—

500ms

——+}

i

"

—500ms

ae?

1

! t

J

I

i

'

t

|

t:

Normally

125ms

I

t

:

Band

edge

512ms

PLL

DATA

(20)

-

(8)

At

equalizer

ON/OFF

KEY

MUTE1

(25)

4.4ms

i

t

'

i

1

20~30ms

P+

—~r—

Bt

9-1

208

20~30ms-w—_te-

912055

MUTE2

(26)

|

—_————

{

EQ

ON/OFF

(19)

eee

t

16

KR-A5010

CIRCUIT

DESCRIPTION

3.

STK4201/2

:

Main

amplifier

(X14-253X-XX

:

IC7)

:

K,

P,

U,

UE,

M,

X

Type

3-1.

Equivalent

circuit

4.

STK4201/5

:

Main

amplifier

(X14-2532-71

:

IC7)

:

E

Type

4-1.

Equivalent

circuit

~KR-A5010

18

CIRCUIT

DESCRIPTION

5.

AN7470

:

FM

MPX

(X14-253X-XX

:

IC3)

5-1.

Equivalent

block

diagram

Leh

Reh

OUTPUT

AMP

OUTPUT

AMP

SCHMITT

CIRCUIT

STEREO

7

MONO

SWITCH

CONSTANT

VOLTAGE

CIRCUIT

19

kHz

FREQUENCY

©

CHECK

5-2.

Terminal

connection

and

functions

Connection/Function

Supply

voltage

(+Vcc)

Stereo

composite

signal,

input

terminal

Input

preamp,

output

terminal

L

CH

output

amp,

feedback

terminal

R

CH

output

amp,

feedback

terminal

R

CH

output

amp,

output

terminal

7

L

CH

output

amp,

output

terminal

Grounding

terminal

Stereo

display

lamp

drive

and

19

kHz

frequency

check

terminal

Stereo

signal

detector

circuit,

low-pass

filter

terminal

Stereo

signal

detector

circuit,

low-pass

filter

terminal

PLL

circuit,

input

terminal

PLL

circuit,

low-pass

filter

terminal

PLL

circuit,

low-pass

filter

terminal

VCO

freerun

oscillation

frequency

adjustment

terminal

Forced

mono/forced

VCO

oscillation

stop

terminal

KR-A5010

CIRCUIT

DESCRIPTION

6.

CX7925B

:

PLL

(X14-253X-XxX

:

IC2)

6-1.

Block

diagram

and

terminal

configuration

diagram

SWALLOW

COUNTER

we

PCB

VOLTAGE

GENERATOR

TIMING

REFERENCE

DIVIDER

CONTROLLER

(144-BIT

,

PROGRAMMABLE)

er

a

)

Ves

CLK

LAT

DIN

Xl

XO

PD

Terminal

Description

PCB

terminal

(Connect

a

0.01

pF

capacitor

between

the

GND).

Input

terminal

for

the

shift

register

input

data

latch

signal

(shifted

at

the

rise)

and,

at

the

same

time,

for

the

Up/Down

clock

(status

changed

at

the

rise).

Data

input

terminal,

also

the

Up/Down

mode

switching

terminal

(Up

mode

with

“H”

level,

Down

mode

with

“L”

level).

Connection

terminals

for

the

reference

signal

generator

X'tal

oscillator.

(Max.

13

MHz,

standard

4.0

MHz)

19

KR-A5010

Sie

INPUT

OUTPUT

TUNER

ALIGNMENT

ITEM

SETTINGS

POINTS

ALIGN

FOR

FIG.

FM

SECTION

Unless

otherwise

specified,

the

individual

switches

should

be

set

as

following:

SELECTOR:

FM

MODE:

FM

MODE/AUTO

L7

(a)

(Front

end)}

Connect

a

DC

Tse]

hemes

qa)

PT

oe

(2)

(Front

end

Repeat

alignments

1

and

2

several

times.

TP6

(VT)

and

TP5

(GND).

ev)

Maximum

amplitude

and

RF

ALIGNMENT

98.

OMHz

L2-4

symretry

of

the

ceiten|

|

1kHz,t75kHz

dev

=

a

(Front

end)

display.

Connect

a

DC

(A)

Pee

ae

voltmeter

between

TP6

(VT)

and

TP

5

(GND),

98.

OMHz

ikHz,+75kHz

dev

6OdBuCANT

input)

Connect

a

DC

voltmeter

between

TP3

and

TP4.

DISCRIMINATOR

Connect

a

330kQ

resis

(A)

tor

to

TP1.

Connect

a

98.

OMHz

frequency

counter

to

98.

OMHz

VR

3

76

.

00kHz

(ce)

0

dev

the

resistor

via

BOdBuCANT

input)

an

AC

voltaeter.

(C)

98.

OMHz

1kHz,

+68.

25kHz

dev

Selector:L

or

R

98.

OMKz

\8

Minimum

distortion.

(Front

end.

(L

or

RB)

60dBuCANT

input)

(C)

98.

OMHz

Minimum

crosstalk.

lkHz,

£68.

25kHz

dev

A

compromise

adjustment

SEPARATION

Selector:L

or

R

98.

OMH2

VR4

may

be

required

if

left-to-

Pilot:

+6.75kHz

dev

right

and

right-to-left

60dBuCANT

input)

separations

are

unequal

CA)

Adjust

VR1

so

that

FLICTUNED

98.

OMHz

goes

off.

Then,

adjust

VR

TUNING

LEVEL

0

dev

98.

OMHz

VR

and

stop

at

the

point

18dBuCANT

input)

where

FLI(TUNED)

goes

on

AM

SECTION

Keep

the

AM

loop

antenna

installed.

SELECTOR:

AM

Connect

a

DC

a)

TP6

(VT)

and

TPS

(GND).|

(531kHz)

Connect

a

DC

BAND

EDGE

voltmeter

between

1610kHz

"3

ae

a)

(2)

TP

6

CYT)

and

TPS

(GND).|

(1602kHz)

Repeat

alignments

(1)

and

(2)

several

tiaes.

()

Maxiaua

amplitude

and

RF

ALIGNMENT

630kHz

(B)

830kHz

L10

symactry

of

the

oscilloscope

a)

400Hz,30%

aod

display.

(D)

Maximua

saplitude

and

(4)

|

RF

ALIGNMENT

1440kHz

(B)

TC2

syanetry

of

the

oscilloscope

(2)

400Hz,30%

sod

display.

A

TUNING

LEVEL

(6)

|

IF

TRANSFORMER

DISTORTION

(STEREO)

Repeat

alignments

(3)

and

ee

|

several

times.

SS

-

(B)

L13

(X14)

Adjust

VR2so

that

FLICTUNED

goes

off.

Then,

adjust

YR4

and

stop

at

the

point

where

FLIC(TUNED)

goes

on.

Maximum

amplitude

and

symmetry

of

the

oscilloscope

display.

Ca)

1000(999)kHz

0

dev

26

dBuCANT

input)

1000KHz

20dBu

(ANT

input)

20

Kenwood KR-A5010 User manual

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