Kenwood KRC-402 User manual

KAC-202/222/902/382|

“ENWOOP

[402/442

SERVICE

MAN

UAL

1995-12

PRINTED

KOREA

B51-6926-00

(K)

1788

The

MECHANISM

OPERATION

DESCRIPTION

the

same

model

KRC-401/441.

Please

refer

the

service

manual

for

model

KRC-401/441

(B51-6791-00).

KRC-402/442

Photo

KRC-402.

Knob

(EJECT)

Cassette

lid

Knob

(REW)

Knob

(FF)

(K24-1681-04) (A53-1617-03)

(K24-1683-04)

(K24-1682-04)

AUTO

#AME,

DISP

PWR

8OFF

CASSETTE

RECEIVER

KRG-4027

Escutcheon

Liquid

crystal

Panel

ass'y

(BO7-2067-02)

(B38-0640-05)

KRC-402

(A64-0629-02)

KRC-442

(A64-0630-02)

Mounting

hardware

ass'y

(J21-7630-13)

Screw

set

(N99-1610-15)

Screw

set

(N99-1632-05)

——

ummm

Plastic

cabinet

ass'y

(A02-1443-03)

Lever

(D10-3031-04)

cord

KRC-402

(E30-431

6-05)

Stay

KRC-442

(E30-431

7-05)

(J54-0071-04)

KRC-202/222/302/332/402/442

CONTENTS

(O17

(1c)

-1

eae

TER

ROPE

mee

RET

CIRCUIT

DESCRIP

TOW

sisesctescsecucienaiceanala

lated

ietscainatteesiaArasthascaseaalan

ATS

TERS

TIME

NT,

ice

aos

sacs

needles

latte

a):

eee

OCR

tere

ana

SLOTS

TOE

EMER

NTC

eva

Mee

PIE

AMATI

DTAGIRAI

soca

coosckeciestivse

Gotha

cence

fen

tid

acrpten

laa

fostmeasts

ade

acrGaruadeons

EXPLODED

VIEW

(MECHANISM)

:iiiscsceusssarcoacrpuiiece

tintin

bansmaptanaeeed

PEO

DED:

WIE

UINDT

)ecess

20s

teectassanenc’

aiscissttoaateetnty

etn

Gtntanaeat

jen

matinton:

roy

(]

rae

NEN

Ronee

meee

eet

EREGIEICA

TIONG

aideeedsn

oie

banter

ene

BACK

COVER

KRC-202/222/302/332/402/442

KRC-302/332

Knob

(EJECT)

Cassette

lid

Knob

(REW)

—

Knob

(FF)

Panel

ass'y

(K24-1681-04) (A53-1617-03)

(K24-1683-04)

(K24-1682-04)

KRC-302

(A64-0631-02)

Photo

KRC-302

KRC-332

(A64-0632-02)

AUTO

BAME

DISP

PWR

@OFF

COMO-CHANGER

CONTROL

Liquid

crystal

(B38-0640-05)

SSSTTE

Escutcheon

KENWOOD

«:

(B07-2067-02)

Mounting

hardware

ass'y

(J21-7630-13)

Plastic

cabinet

ass'y

(A02-1443-03)

Lever

cord

(D10-3031-04)

KRC-302

(E30-4316-05)

KRC-332

(E30-4317-05)

Screw

set

(N99-1632-05)

Screw

set

(N9Q9-1610-15)

Stay

(J54-007

1-04)

___—zxe

KRC-20

Knob

(EJECT)

_—

Cassette

lid

Knob

(REW)

Knob

(FF)

Panel

ass'y

(K24-1681-04)

(A53-1617-03)

(K24-1683-04)

(K24-1682-04)

KRC-202

(A64-0636-02)

KRC-222

(A64-0837-02)

Photo

AUTO

#AME

DISP

PWR

OFF

Liquid

crystal

(B38-0640-05)

KENWOOD

Escutcheon

(BO7-2067-02)

Plastic

————

cabinet

assy

(A02-1443-03)

Mounting

hardware

ass'y

(J21-7630-13)

Liver

(D1

O-3031-04)

cord

KRC-202

(E30-4316-05)

KRC-222

(E30-4317-05)

Sireew

set

(N9@-

1632-05)

Sireew

set

(19

9-1610-15)

Stay

(J54-007

1-04)

NOD'd

300W

AGLS

aga

NOOd

ODA

etd

atny

B*N0D

Ovld

AINO

@22/Zee/Zrr-SUW

AINO

ZEE/ZOE/ZPH/ZOF-OUN

ANNO

2b0/Z0b-OHN

tiPlLlo

a10H

—

iad

dn@

WHOAW

3dVL

4NO

130

(NI

FLOW

WS)

(oIsAWLNO

SAY

ZEL'94bD

BLOCK

DIAGRAM

¥3MOd

O3W/1NOO

(dNOONI

y0e~10Z0

Awozor

(Ho-G9)

Aweoee

(Ho-d9)

KRC-202/222/302/332/402/442

AWEED

{Wy}

OSI

HO-d9

ysONvHO

AQV'DS

Advi

SYNTHESIZER

UNIT

(X14

5400

-XX)

KRO-202/222/302/332/402/442

CIRCUIT

DESCRIPTION

Use

and

Function

Operation

and

Condition

‘|

w-COM

ELECTRONIC

VOLUME

‘|

amp/Electronic

VOL/NC

MPX/CH

!SO/T.ADV/METAL/BASS/TRE

POWER

SUPPLY

PWR

DOLBY

CRSC

p-COM

(60).

METAL

when

u-COM

(53)

goes

IC2

MUTE

when

u-COM

(17)

goes

PWR

when

p-COM

(58)

goes

L.P.F.

MUTE

when

u-COM

(17)

goes

DSI

when

u-COM

(26)

goes

PANEL

VDD

when

p-COM

(45)

goes

2-COLOR

when

u-COM

(24)

(25)

ILLUM

Q108

turned

when

Q106

goes

ON.

Q109

turned

when

Q107

goes

ON.

Q117

MOTOR

PLUNGER

MOTOR

DRIVER

PLUNGER

DRIVER

ILLUM

DRIVER

ILLUM

PWR

ANT

PWR

ANT

DRIVER

when

u-COM

(22)

goes

when

u-COM

(21)

goes

When

Q110

goes

ON,

Q112

turned

and

mechanism

motor

starts

rotation.

when

Q111

goes

ON.

When

Q115

goes

ON,

Q114

turned

and

illumination

power

supplied

when

p-COM

(59)

opens

turn

Power

supply

(3)

ON.

When

u-COM

(18)

goes

When

Q116

goes

ON,

Q117

turned

and

power

supplied

power

antenna.

Q118

B-UP

DETECT

when

B-UP

detected.

Q119

SURGE

DETECT

when

Power

supply

(11)

goes

Q120

HOLD

DETECT

when

u-COM

(67)

goes

Q121

HOLD

when

Q118

goes

ON.

Puts

n-COM

HOLD

mode.

Q125

SVR

CONTROL

when

Q126

turned

pt-COM

(16)

going

Q126

SVR

when

p-COM

(16)

goes

Q127

AMP

STBY

when

Q118

turned

OFF

power

down.

Both

AMP

STBY

and

AMP

MUTE

Q201~204)

PRE

MUTE

when

p-COM

(17)

goes

Q401

CD-CH

MUTE

when

MUTE

goes

Q402

CD-CH

RST

when

Q@403

turned

pressing

RST

buiton.

Q403

CD-CH

RST

when

RST

button

pressed.

KRC-202/222/302/332/402/442

CIRCUIT

DESCRIPTION

IC1

LC72358-9202

(X14-5400-XX)

Microcomputer

Terminal

Connection

AMIN

<—

SNS

|-———

VDD

72|-——

VSS

|~+—

E03

<+—

LCTR

foo)

<«—

TEST1

78|-—>

E01

|——

VSS

~+—

FMIN

70|——

HCTR

—

HOLD

«—

METER

|—»

E02

XIN

TEST2

EV-CLK

EV-DATA

FM+B

AM+B

CH-DATAC

CH-DATAH

CH-CLK

CH-REQH

CH-CON

CH-REQC

FF/REW

TAPE

AMP

STBY

SVR

MUTE

ANT-CONT

PCON

F&F

LC7258-

T-ADV

MOTOR

PATE

tld

GREEN

onnnor

owt

ees

24-8

ooOoOwWwWwWS

eva

bas

3295056

—

MUSIC

fre

etttted

teed

ee tt tt

BUCK

ACC

MUTE

CRSC

OFF

ILLUM-ON

PON

CONT

SURGE

AM-SD

METAL

EQMUTE

DOLBY

LOCAL

AFC

FWD/REV

PANEL

BEEP

-KRC-202/222/302/332/402/442

CIRCUIT

DESCRIPTION

Terminal

description

Function

Description

HOLD

mode

EV-CLK

Electronic

volume

control

Clock

fine.

EV-DATA

Electronic

volume

control

Data

line.

FM+B

power

control.

AM+B

power

control.

CH-DATAC

Changer

data

input.

CH-DATAH

Changer

data

output.

Last

state

CH-CLK

Changer

clock

input.

CH-REQH

Changer

request

output.

CH-CON

Changer

control.

CH-REQC

Changer

request

input.

FF/REW

Tape

FF/REW

detection.

"L"

FF/REW.

TAPE

Tape

input.

"L"

Tape

mode.

AMP

STBY

Standby

output

power

amplifier.

“SVR

Power

amp

muting

output.

—

“H"

=Muting

sec.

‘MUTE

Audio

muting

output.

"L"

Muting.

sec.

{

ANT-CONT

Tuner

antenna

control.

"H"

Tuner

mode.

PCON

Power

control

"H"

ON.

Name

Si0/PG3

SO0/PG2

SCKO/PG1

PGO

SI1/PF3

S01/PF2

SCK1/PF1

PFO

S$!2/PE3

$02/PE2

SCK2/PE1

PEO

PD3

PD2

PD1

PDO

PC3

PC2

PC1

T-ADV

Tape

advance

plunger

output.

"H"

ON.

Tape

motor

output

"H"

ON.

PB3

PB2

GREEN

Illumination

amber.

"H"

ON.

PB1

AMBER

Illumination

green.

"H"

ON.

PBO

DS!

DSI

"H"

ON.

SEL3

Destination

type

selection terminal.

With

pull

down

resistor.

SEL2

__Destination

type

selection

terminal.

With

pull

down

resistor.

SEL1

Destination

type

selection

terminal.

With

pull

down

resistor.

SELO

Destination

type

selection

terminal.

With

pull

down

resistor.

Vdd

LCD-DI

LCD

driver

Data

input.

LCD-DO

LCD

driver

Data

output.

LCD-CLK

LCD

driver

Clock

output.

LCD-CE

LCD

driver

Chip

Enable

output.

LCD-RST

LCD

driver

Reset

output.

ised

sac

Vac

—|O|O

PA2

PAI

PAO

Vdd

PQO

PP3

PP2

PP4

PPO

PO3

PO2

PO1

POO

PN3

PN2

PN1

PNO/BEEP

PM3

PM2

PM1

PMO

PL3

PL2

PL1

BEEP

Beep

output

(2.08

kHz).

PANEL

Panel

detection.

"L"

Panel

detected.

input.

“H"

ON.

input.

“H"

ON.

FWD/REV

Tape

FWD/REV

input.

“H"

FWD.

AFC

Tuner

AFC

output.

"L"

During

seek.

LOCAL

Tuner

Local

output.

"H"

During

seek.

DOLBY

Tape

Dolby

output.

"H"

ON.

O/O;O/—|-—|}—-|-jOJ/OJOJO/O/O/O/O;O/O/O/o

KRC-202/222/302/332/402/442

Name

Function

CIRCUIT

DESCRIPTION

Description

HOLD

mode

PLO

EQMUTE

Tape

muting

output.

PK3

METAL

Tape

Metal

output.

“H"

ON.

PK2

AM-SD

band

detection.

"H"

Station

detected.

PKI/INT14

SURGE

Surge

detection.

PKO.INTO

PJ3

CONT

Tuner

counter

output.

"L"

ON.

PJ2

PON

Power

ON.

"L"=

ON.

"H"

1.15

sec.

PJ1

ILLMI-ON

Illumination

ON.

"OPEN"

ON.

PJO

CRSC

ON/OFF.

"L"

OFF.

PIV/ADI5

CRSC

OFF

PIO/ADI4

MUTE

"L"

when

station

detected

band.

Vth

1.2V.

PH3/ADI3

ACC

Acc

detection.

"H"

ON.

PH2/ADI2

BUCK

Back-up

detection.

"L"

Power

down.

Recovery

with

PH1/ADI1

“MUSIC

Music

detection.

“L"

Music

detected.

PHO/ADIO

Meter

band

station

detection.

"H"

Station

detected.

HOLD

Hold

detection.

"L"

Hold.

SNS

Power

down

detection.

LOTR

HCTR

counter

input.

Phase

detector

error

output.

Connected

GND.

"OPEN".

VCO

input.

VCO

input.

Phase

detector

error

output.

"OPEN".

Phase

detector

error

output.

CD-CH

T.CALL

PWR

OFF

Key

matrix

#1:

Keys

K/M

type

models

other

than

the

KRC-402/442.

#2:

Keys

type

models.

The

type

model

basically

identical

the

type

except

that

used

place

SDK.

#3:

Keys

K/M

type

models

other

than

the

KRC-402/442.

#4:

L/N

type

models.

KRO-202/222/302/332/402/442

CIRCUIT

DESCRIPTION

KI5

SOURCE

POWER

OFF

PANEL

AUTO

A-MEMO

LOUD

AUTO/LOCAL

A-MEMO

SDK(D)

DKVOL

ADJ

T1(J)

AUTO/LOCAL

A-MEMO

LOUD

ILLMI

AUTO

A-MEMO

LOUD

Radio

M-RDM

DOWN

Radio

Ta:

METAL

RANDOM

CRSC

MONO

CRSC

MONO

Radio

DOLBY

T-SCAN

AT-SK.S

ON/OFF

Radio

Ta:

T-ADV

Radio

REPEAT

Radio

Ta:

T-CALL

D-SCAN

VOLUME

Destination

type

setting

Selected

model

and

type

AUDIO

VOL RET

SEL3

SEL2

—t

ATT

LOUD

ATT

(D/J)

ATT

Selected

model

and

type

KRC-442

The

type

model

switchable

type

model.

*in

the

table

above,

"1"

means

pull

few

ohms

and

"O"

means

OPEN

(pulled

down

software).

o!|ofo!o

KRC-202

o-)-0

KRC-157L

KRC-302

KRC-357L

KRC-357N

KRC-157N

KRC-332

1 1

KRC-157D

KRC-402

1/410/14

KRC-222

4 1 1

KRC-357D

1 1 1

KRC-202/222/302/332/402/442

ADJUSTMENT

ITEM

INPUT

SETTINGS

OUTPUT

SETTINGS

TUNER

(RECEIVER)

ALIGNMENT

POINTS

ALIGN

FOR

SECTION

DISCRI-

MINATOR

(A)

98.1MHz

Odev

60dB

(ANT

input)

Connect

voltmeter

TP(F/E)

(F/E)

ANRC

(STOP

LEVEL)

(C)

98.1MHz

1kHz,£67kHz

dev

Pilot:

7.5kHz

dev

Setector:L

act

35dB

(ANT

input)

()

98.1MHz

Separation

10dB

—

STOP

LEVEL

dss

SECTION

(D)

990

KHz

400Hz,30%

mod

35dB

(ANT

input)

CASSETTE

DECK

SECTION

AZIMUTH

PLAYBACK

LEVEL

MTT-114

10kHz

KRC-402/443/302/332

ONLY

MTT-150

Connect

voltmeter

TP1

TAPE

PLAY

TAPE

PLAY

Adjust

the

azimuth

for

each

chor

FWD

/RVS

becomes

maximum

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