Kenwood Kr-v86r User manual

ste

AUDIO-VIDEO

STEREO

RECEIVER

v

@

ap

;

SERVICE

MANUAL

PRINTED

IN

JAPAN

B51-3232-00(O)

2238

Knob

Front

glass*

Panei*

Metallic

cabinet

Knob

(K29-2333-04)

(B10-)

{A20-)

{A01-11546-01)

(K29-2671-04)

Phone

jack

Knob

Dressing

plate

(E11-0162-05)

(K29-2668-04)

x3

{BO3-2280-04)

Knob

(Button)

Foot

Knob

Remote

controller

ass’y

*

(K27-1644-04)

x2

(JO2-0126-05)

x4

(K29-2667-03)

(A70-)

Electric

circuit

module”

AC

outlet*

Lock

terminal

board

(8P)

(W02-0741-15)

(E03-)

(E20-0823-05)

Screw

terminal

board

(2P)*

Phono

jack

Slide

switch

*

(E20-)

(E13-0291-05)

x3

(S31-2083-05)

Binding

post

Phono

jack

(4P)

Miniature

phono

jack*

AC

power

cord*

(NO8-0128-35)

(E13-0446-05)

({E11-0165-05)

(E30-)

Phono

jack

(2P)

Phono

jack

(8P)

Slide

switch

Power

cord

bushing

{E13-0235-05)

({E13-0819-05)

x2

(S31-2113-05)

(J42-0083-05)

*

Refer

to

parts

list

on

page

47.

98h

KR-V86R

CONTENTS/DISASSEMBLY

FOR

REPAIR

DISASSEMBLY

FOR

REPAIR

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

2

BLOCK

LEVEL

DIAGRAM

..................-.

4

CONTROLS

AND

INDICATORS

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

5

CIRCUIT

DESCRIPTION

Description

of

components.

......-...02+e00es

9

Microprocessor

:

uPD75108CW-041

(X14-2130-12

ICI).

eee

11

Indicator

tube

:

FLP2OAMW30

(X14-2130-12:FL1)

..

2...

ee

eee

15

Test

MOd@

6

os

eels

vee

wie

Pa

ee

Dee

ae

AG

Initialization

©...

ee

ees

16

Selector

tuner

2...

ee

eee

17

(Remove

the

metallic

cabinet

before

performing

the

follow-

ing

operations.)

1.

Remove

the

9

screws

retaining

the

front

panel

to

the

sub

panel

(

@P).

2.

Remove

the

screw

on

the

panel

escutcheon,

and

disengage

the

5

claws

retaining

the

panel

escutcheon

to

the

sub

panel

(

@).

3.

Place

the

panel

escutcheon

on

the

unit

(

3

]

).

At

this

time,

place

a

cloth,

etc.,

below

the

panel

escutcheon

to

protect

the

panel

escutcheon

from

being

scratched.

ADJUSTMENT

..........

0.0.00

00

cee

eee

20

REGLAGE®

3)

ie.)

eeu

ce

i

Oe

Bo

en

See

ek

21

ABGLEICH

cso

acy

Wile

a

ee

ete

eed

22

ADJUSTMENT/REGLAGE/ABGLEICH..........

23

VOLTAGE

CHECK

TABLE

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

24

PC

BOARD

(COMPONENT

SIDE

VIEW)

.........

25

PC

BOARD

(FOIL

SIDE

VIEW)

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

29

CIRCUIT

DIAGRAM

...................04.

36

EXPLODED

VIEW

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

00008.

45

PARTS

LIST

oeicnun

Seatac

aod

Shey

sia

ORL

aa

47

SPECIFICATIONS

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

BACK

COVER

10.

11.

DISASSEMBLY

FOR

REPAIR

Disengage

the

6

claws

retaining

the

Display

Unit

(X14-

2130-12)

(C/6)

to

the

panel

escutcheon

(

4]

}:

Remove

the

3

screws

retaining

the

Display

Unit

(X14-)

(A/6)

to

the

panel

escutcheon

(

@

).

Disengage

the

4

claws

retaining

the

Display

Unit

(X14-)

(A/6)

to

the

panel

escutcheon

(

6)

).

Disconnect

the

connector

(CN1-A,B)

which

have

been

connected

to

the

Display

Unit

(X14-)

(A/6)

and

(X14-)

(B/6)

(

@).

Place

the

Display

Unit

(X14-)

(A/6)

in

the

direction

of

the

arrow

(

@).

Remove

the

4

screws

retaining

the

Display

Unit

(X14-)

(B/6)

to

the

panel

escutcheon

(

(9)

).

Disengage

the

8

claws

retaining

the

Display

Unit

(X14-)

(B/6)

to

the

panel

escutcheon.

To

facilitate

this

proce-

dure,

disengare

the

claws

from

right

(

®

)

to

left

(®).

Remove

the

Display

Unit

(X14-)

(B/6)

in

the

direction

of

the

arrow

(

@

).

mwisloln

KR-V86R

BLOCK

LEVEL

DIAGRAM

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KR-V86R

CONTROLS

AND

INDICATORS

KENWOOD

aunio-vingo

sTeREO

RECEIVER

@

POWER

switch

Press

this

switch

to

turn

on

power.

(The

POWER

STAND

BY

indicator

lights.)

Press

it

again

to

turn

power

off.

@

SPEAKERS

A

and

B

switches

A.B

OFF

-

This

position

silences

all

speakers

to

permit

private

use

of

headphones.

A

ON

-

Activates

speakers

connected

to

the

SPEAKERS

A

terminals

on

the

rear

panel.

B

ON

-

Activates

speakers

connected

to

the

SPEAKERS

B

terminals

on

the

rear

panel.

A.B

ON

-

Activates

speakers

connected

to

the

SPEAK-

ERS

A

and

B

terminals

simultaneously.

Note:

———_——_-_-[—SS

When

the

SPEAKERS

A

and

B

switches

are

used

at

the

same

time.

the

speakers

connected

to

the

SPEAKERS

A

and

B

terminals

are

connected

in

series.

In

this

respect.

whenever

using

the

SPEAK-

ERS

A

and

B

switches

at

the

same

time.

be

sure

that

two

pairs

of

speakers

are

connected

to

the

terminals

A

and

B,

otherwise

no

sound

is

output.

@

PHONES

jack

Stereo

headphones

are

plugged

into

this

jack.

@

EQ

(Equalizer)

PRESET

keys

Use

these

keys

to

store

equalizer

curves

in

memory

or

to

recall

them.

PGM:

User-adjusted

equalizer

curves

can

be

programmed

as

desired

and

stored

in

memory:

up

to

five

patterns.

SET:

Five

factory-preset

equalizer

curves

are

stored

in

memory.

Upto

10

equalizer

curve

memories

are

available

in

total.

Press

the

PGM/SET

key

to

select

either

the

user-

programmed

pattern

or

the

factory-preset

pattern.

Pe

SSeS

siozist=

peeeese=e

==

——

=

cori

cineca

os

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alt

a

as

a

Li,

le

ae

LVI

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Pe

|

oer

owe

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CHENGRT]

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Lael

©

Equalizer

level

controls

Adjust

these

controls

up

and

down

to

equalize

the

sound

by

+12

dB

to

the

center

frequency

indicated.

@

EQUALIZER

key

Press

this

switch

to

ON

and

the

frequency

characteristic

will

be

modified

by

passing

through

the

graphic

equalizer.

In

the

DEFEAT

position,

the

frequency

characteristic

remains

unchanged.

@

EQ

REC

key

Used

when

recording

the

source

onto

the

tape

deck

through

the

equalized

response

af

the

graphic

equalizer.

©

EQ

PRESENCE

controls

Adjust

these

controls

(INCREASE

and

DECREASE)

to

boost

or

attenuate

the

equalizer

curve

indicated.

©

PGM/SET

key

Pressing

this

key

alternates

the

preset

equalizer

curves

to

be

recalled

between

PGM

(user-programmed

patterns)

and

SET

(factory-preset

patterns)

groups.

@

Equalizer

preset

MEMORY

key

This

key

is

used

to

store

an

equalizer

curve

into

the

PGM

PRESET

memories.

First,

select

the

desired

equalizer

curve

and

then

press

this

key.

Then

press

any

of

the

PRESET

(A

to

E)

keys.

The

selected

equalizer

curve

will

be

stored

in

the

memory

indicated

by

the

PRESET

key

pressed.

KR-V86R

CONTROLS

AND

INDICATORS

@

THROUGH

DUBBING

[2]

>

[1]

key

This

activate

the

through

dubbing

from

VIDEO

2

to

VIDEO

Te

@

THROUGH

DUBBING

[3]

>

[1]

key

This

activate

the

through

dubbing

from

VIDEO

3

to

VIDEO

1.

Note:

——___________-—-______—_——_.

Pressing

the

THROUGH

DUBBING

key

twice

will

resume

the

@®

Input

selector

switches

VIDEO

1

—

Selects

the

video

recorders

connected

to

the

VIDEO

1

jacks.

VIDEO

2

-

Select

the

video

recorders

connected

to

the

VIDEO

2

jacks.

VIDEO

3

-

Select

the

video

recorders

connected

to

the

VIDEO

3

jacks.

TAPE

1

—

Press

this

switch

to

play

back

a

tape

deck

connected

to

TAPE

1

jacks.

TAPE

2

-

Press

this

switch

to

play

back

a

tape

deck

connected

to

the

TAPE

2

jacks.

(The

TAPE-2

switch

is

Operated

in

priority

to

any

other

audio

input

systems.)

TUNER

-

Selects

the

tuner

mode.

CD/AUX

-

Selects

the

source

connected

to

the

CD/AUX

jacks.

PHONO

-

Selects

the

program

source

played

on

the

turntable.

@

AUDIO

INJECTION

switch

Press

this

switch

ON

when

replacing

the

sound

of

VIDEO

1,

2

with

that

of

AUDIO

source.

or

when

the

sound

equalized

by

graphic

equalizer

is

required

on

dubbing

between

VIDEO

sources.

@

CATV

ON/OFF

switch

Press

this

switch

to

select

FM

759

or

CATV

7529

antenna

line.

@

REMOTE

POWER

STAND

BY

indicator

This

indicator

lights

so

far

as

the

power

cord

is

plugged

into

the

AC

outlet.

It

is

lit

to

show

that

the

POWER

switch

on

the

front

panel

or

the

POWER

key

on

the

remote

control

unit

can

be

activated.

@

REMOTE

SENSOR

Point

the

supplied

remote

control

unit

towards

this

sensor

and

operate.

It

blinks

when

the

signal

from

the

remote

control

unit

is

received.

@

MUTING

key

When

the

muting

key

is

pressed,

the

MUTING

indicator

in

the

display

window

will

flash,

and

the

overall

listening

sound

level

is

reduced.

When

the

key

is

pressed

again,

you

can

restore

exactly

the

same

listening

level

as

before.

@

BALANCE

controls

Governs

the

amount

of

sound

coming

from

each

paired

speakers

to

get

optimum

stereo

effect.

Pressing

the

RIGHT

key

will

decrease

the

left

channel

volume

and

pressing

the

LEFT

key

will

decrease

the

right

channel

volume.

When

the

BALANCE

controls

is

pressed,

display

window

shows

the

BALANCE

indicator.

@

VOLUME

controls

This

control

adjusts

the

left-

and

right-channel

volumes

simultaneously.

Set

it

for

the

desired

listening

level.

Pressing

the

up

(A)

key

increases

the

volume

and

pressing

the

down

(V)

key

decreases

it.

Note:

———--—_£.

TT

_iiuc——

A

slight

noise

is

heard

from

the

speakers

when

operating

the

VOLUME

controls.

This

noise

is

the

built-in

microprocessor

control

signal

and

is

not

a

fault.

@

Preset

(numeric)

keys

Use

these

keys

to:

1)

input

directly

the

digits

of

frequencies,

or

2)

store

and

recall

frequencies

in

the

preset

memory.

@

DIRECT

key

Used

to

tune

to

the

station

directly.

Input

the

desired

frequency

numerics

with

the

numeric

keys

after

pressing

the

DIRECT

key.

KR-V86R

CONTROLS

AND

INDICATORS

@

AUTO/MANUAL

(MONO)

key

When

this

key

is

pressed,

the

AUTO

indicator

will

light.

The

frequency

will

automatically

stop

at

a

station

in

automatic

tuning

mode.

When

a

stereo

broadcast

is

received,

the

Output

sound

is

automatically

changed

to

stereo.

@

TUNING

key

Used

to

change

the

frequency.

Pressing

UP

side

will

advance

to

the

higher

frequency

and

pressing

DOWN

side

to

the

lower

frequency.

In

the

station

name

input

mode,

this

key

is

used

to

select

the

character.

@

BAND

selector

switches

FM

-

For

FM

broadcasts.

AM

-

For

AM

broadcasts.

@

DIGIT

SELECT

key

In

the

station

name

input

mode,

pressing

this

key

advances

the

column

after

selecting

the

character

with

the

Tuning

UP/DOWN

key.

When

this

operation

is

repeated

four

time,

the

station

name

input

mode

will

be

released

automatically.

@

CHARACTER

MODE

key

Press

this

key

to

activate

the

station

name

input

mode.

@

MEMORY

key

When

the

input

mode

is

tuner

mode,

use

this

button

to

store

new

broudcast

station

data

in

the

preset

channel

memory.

By

pressing

the

MEMORY

key,

setting

the

preset

function

key

to

1-10

or

11-20

and

by

pressing

one

of

the

PRESET

10

key,

the

frequency

being

received

is

stored

in

the

memory

in

the

preset

10

key

pressed.

€@

MUSIC

SELECT

key

Pressing

this

key

alternates

between

the

Music

Select

mode

and

the

Preset

indicator

mode.

@

MUSIC

genre

key

In

the

Preset

indicator

mode,

a

desired

music

genre

can

be

stored

into

each

Preset

Channel

memory

button.

In

the

Music

select

mode,

this

key

is

also

used

to

select

the

music

genre.

@

CLEAR

key

Used

to

clear

the

contents

stored

in

the

preset

channel

memory.

After

recalling

the

preset

channel

to

be

cleared,

pressing

this

key

will

clear

the

memorized

contents.

@

Preset

function

(1-10/11-20)

key

Used

to

select

1-10

or

11-20

setting

for

the

preset

channel

key.

In

either

FM

or

AM

mode,

20

stations

can

be

preset

as

random

as

each

setting

(“

1-10”

or

11-20")

can

contain

10

preset

stations.

Indicator

"1-10"

lights

when

“1-10”

setting

is

used,

and

indicator

“11-20”

lights

when

“11-20”

setting

is

used.

@

SEEK

LEVEL

select

key

(During

FM

reception

only)

Used

to

select

the

stop

level.

When

‘’L”

is

selected,

the

Auto

Stop

and

Auto

Memory

functions

are

possible

even

for

the

weak-signal

stations.

When

‘‘H”

is

selected,

the

Auto

Stop/Auto

Memory

functions

are

performed

only

for

the

stations

having

strong

signal.

Pressing

this

key

alter-

nates

between

“L”

and

“H”.

@

AUTO

MEMORY

key

When

this

key

is

pressed

ON,

the

station

frequencies

will

be

scanned

and

stored

into

the

Preset

Channels

automati-

cally.

Scanning

operation

is

performed

from

the

displayed

frequency

to

the

higher

range

and

finished

after

one

cycle

is

Over

with

the

receiving

band.

During

Auto

Memory

operation,

the

Memory

indicator

blinks.

To

release

it.

press

the

AUTO

MEMORY

key

again.

@

PRESET

SCAN

key

Use

this

key

for

preset

channel

scanning.

When

a

frequency

stored

in

the

preset

memory

is

being

received,

pressing

this

key

shifts

the

reception

to

the

stored

in

the

preset

memory.

(The

preset

channels

are

scanned

in

the

order

1,

2......

Vite

U2

sec

20,)

When

frequencies

other

than

those

stored

in

the

preset

memory

received,

pressing

this

key

changes

the

reception

to

the

frequency

in

preset

channel

1.

@

Tostop

ascanning

operation,

press

the

SCAN

key

again.

@

In

MUSIC

SELECT

mode,

a

preset

scanning

operation

is

performed

within

the

music

genre

selected.

KR-V86R

CONTROLS

AND

INDICATORS

@

Display

window

Colca

vIpEo

AUDIO

INJECTION

:

°

@

Display

the

power

level

display.

@®

In

graphic

equalizer

mode,

displays

the

equalizer

level

display,

the

music

spectrum

analyzer

display

and

peak

hold

display.

@

Displays

when

storing

or

recalling

equalizer

preset

channel

in

memory.

@

This

indicator

lights

when

the

Memory

(EQ)

key

is

pressed

to

store

the

desired

equalizer

curve.

®

Equalizer

Presence

Indicator.

©

Lights

when

the

EQUALIZER

switch

is

set

to

“ON”.

Lights

when

the

EQUALIZER

switch

is

set

to

“DEFEAT”.

@)

This

indicator

lights

when

EQ

REC

(equalizer

recording)

is

engaged

for

Tape

1.

@

Lights

when

the

CATV

switch

is

pressed.

@

This

displays

the

‘’L”

or

“H”

seek

level

in

FM

mode.

@

This

displays

the

input

mode,

preset

channel,

station

name.

front

volume

level,

rear

level

balance,

surround

mode,

EQ

preset

channel

and

music

genre.

@

Lights

when

the

MEMORY

key

is

pressed.

Blinks

when

the

AUTO

MEMORY

key

is

pressed.

Displays

preset

music

genre

selected

at

music

select

mode,

and

all

of

the

preset

broadcast

station

channels

which

are

in

the

Preset

indicator

at

preset

indicator

mode.

VOLUME

LEVEL

y

y..

STEREO

TUNED

@

Indicates

the

left

and

right

volume

balance.

@®

Displays

the

volume

level.

@

Flashes

when

the

MUTING

key

is

pressed.

When

the

Music

Select

key

and

MUSIC

GENRE

key

are

pressed,

the

“MUSIC

SELECT”

and

one

of

the

music

genre

indicators

light.

@

“1-10"or

“11-20”

lights

according

to

the

selection

of

the

preset

function

keys.

@)

In

tuner

mode,

lights

when

a

station

is

tuned

in.

@

In

tuner

mode,

lights

when

a

stereo

broadcast

is

tuned

in.

@

Displays

the

digital

frequency

display.

Lights

during

auto

tuning.

@

Displays

the

tuner

band

“FM”

or

“AM”.

@

Lights

when

the

TAPE-2

key

is

pressed.

@)

Display

the

VIDEO

dubbing

mode,

VIDEO

monitor

out

mode,

EQ

REC

mode

or

through

dubbing

mode

displays.

@

Lights

when

the

AUDIO

INJECTION

is

pressed.

@)

Lights

when

the

PGM/SET

key

is

set

to

“PGM”.

@

Lights

when

the

PGM/SET

key

is

set

to

“SET”.

KR-V86R

CIRCUIT

DESCRIPTION

Description

of

components

TUNER

UNIT

(X05-3330-12)

Pict

fFwiFdemor

CCS

\C2__|

PLL

(phase-lockedioopi

___—+|SSSCSCSCSCSCSSCSSS

a

IC4

FM

MPX

7

Q5

FM

+

B

select

Turns

ON

in

FM

mode.

Q6

AM

+B

select

Turns

ON

in

AM

mode.

Q7

FM

+

B

select

Turns

ON

in

FM

mode.

Q8

TUNED

indicator,

for

SD

Turns

OFF

when

tuned.

ag

Forced

mono

select

Turns

OFF

in

forced

mono

mode.

TUNED

indicator,

for

SD

Turns

ON

when

tuned.

Forced

mono

select

Turns

ON

in

forced

mono

mode.

CATV

relay

drive

Turns

ON

in

CATV

mode.

Q14,

15

Seek

level

select

Q15

is

ON

and

Q14

is

OFF

when

low.

Q16

Buffer

for

LS

+

B

ripple

filter

Microcomputer

(4-COM)

power

supply,

20

for

fast

OFF

MAIN

AMPLIFIER

UNIT

(X07-2350-

12)

Component

Use/

Function

Operation/Condition/Compatibility

Ic1

Protection

Relay

drive.

ai=4

|

Prmarystgevelapaniieetien

|

ara~16

|

Third

stops

vottoge

amplification

|

_________—S

aai~24

|

Power

amplifier

drive

|

Q27,

28

Protection,

current

detection

Negative

(—)

side.

Q29

Transmits

the

current

detected

signal

to

1C1.

10

AUDIO

UNIT

IC4

1C5

IC6

:

’

(X09-2470-

12)

Use/

Function

Phono

equalizer

1C2,3

Input

selector

select

GE,

GE

REC

ON/OFF,

surround

mode

select

Buffer

for

REC

CIRCUIT

DESCRIPTION

Operation/Condition/Compatibility

ai

|

ice.

VR

array

for

GE

(graphic

equalizer)

1C7,8

Op

amplifier

for

GE

(graphic

equalizer)

Semiconductor

L

(self-reactance)

x

7.

For

front

channel.

Muting

when

changing

the

selector.

Q9

and

Q10

are

driven

by

open

collector.

Emitter

follower.

Muting

for

MAIN

IN

section.

Switch

for

—33V,

high-8

(beta)

transistor.

Inverted-darlington

connection

with

Q32.

Error

amplification.

1C10

Electronic

volume

C12

3-pin

regulator

15V.

Muting

Q11

Q13,

14

Land

R

mixer

for

apectrum

analyzer

Q17,18

Muting

Q19,

20

Drive

circuit

for

muting

Q25

Constant

voitage

for

—33V

Q27

For

FL

ON

(go

on)

timing

Q28

Q29

For

FL

OFF

(go

out)

on

power

OFF

Q30

For

—14V

constant

voltage

Q31

—14V

constant

voltage

Q32

—14V

constant

voltage

Q33

5V

constant

voltage

Q34

5V

constant

voltage

Q37,

38

For

main

amplifier

bias

DISPLAY

UNIT

(X14-2130-

12)

Q39~42

Main

amplifier

final

stage

5V

power

supply

for

display.

5V

power

supply

for

u-COM

(microcomputer).

Component

Use/

Function

Operation/Condition/Compatibility

{C1

1C8,9

1C10,

11

IC12,

13

1C14~17

(2/2)

1017

(1/2)

Mierocomputer

ee

Transistor

array

(for

FL

drive)

Active

low.

GE,

SP

display

IC

Logic

IC

Static

driver

(for

FL

drive)

Transistor

array

(for

FL

drive)

Active

high.

Data

mute

circuit.

Analog

switch

IC

Spectrum

analyzer

band-pass

filter

Spectrum

analyzer

band-pass

filter

Qi~4

Q7

Q8~10

Qi1

Digital

transistor

(for

FL

drive)

Video

select.

|

an

Input

amplifier.

ea

For

through-dubbing

control

Turns

OFF

when

a

through-dubbing

operation

is

activated

in

VIDEO

2

and

VIDEO

3

mode.

Data

mute

circuit

Video

output

buffer

Q12,

13

a14

Realy

drive

Microcomputer

reset

circuit

ania

Turns

ON

for

several

milli-seconds,

when

power

is

turned

ON.

Kenwood KR-V86R User manual

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