Kenwood KRC-2001 Manual de usuario

KENWOOD

KRG-200'

STEREO

CASSETTE

RECEIVER

Knob

Knob Knob

188804)

(K27-1581-04)

(K27-1580-04)

(K27-1579-04)

—

{K29-1

889-04)

Knob

Dressing

pane!

LCD

Assy

Knob

(K29-1888-04)

(A21-0493-03)

(B38-0066-05)

(K29-1888-04)

Heat

sink

(FO1-0681-03)

—-————-

Cord

with

connector

(E30-1430-15)

Cord

with

plug

(E30-1429-05)}

Cord

with

DIN

connector

(E30-1431-15)

DISASSEMBLY

FOR

REPAIA

DISASSEMBLY

FOR

REPAIR

Remove

screws

retaining

the

top

cover

and

pull

(0.8)

Remove

screws

and

remove

bottom

plate

(‘O.

Remove

screws

and

remove

the

panel

assy

([email protected])

Remove

screws

retaining

the

mechanism

and

pull

out

the

connectors

(@,.@.@)

Remove

the

nuts

from

the

axis

and

take

off

the

solder

from

the

PCB

and

pull

out

the

connector

(@.

®)

than

Tem

KRG-2001_

DISASSEMBLY

FOR

REPAIA

Pull

out

the

PCB

from

the

bottom

main

PCB

(®.

®)

Removes

the

screw

display

assy

(

)

and

remove

six

screws

heat

sink(

)

Remove

the

screw

(

&®

)

and

pull

out

the

connector

)

Remove

the

screws

(

)

and(

)

XIMLVW

ZLZLINW

Adv

ZHOOv

ao7

Y3TIONLNOD

Tid

"A8Q

ZH4

‘ZH

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(adv)

Augc

AWip

AWOLE

AUOPL

SaPOL—

AWTL

AdvL

AYLEL

3IdVL

sap

t€—

Nid

()

LNdLno

HATIONLNOO

(-L

LX)

Got

H-

eae

(LEX)

£91

Y¥aNNL

dS)

¥yadvs

WaMOd

dINV

H3MOd

3NOL

bul

(-L

LX)

(-VLX)

2°

LOt

(-LLX)

994

(-L

LX)

vol

XdN

130/dl

QN3

LNOY4

(-L

LX)

291

(-LLX)

LOI

BLOCK

LEVEL

DIAGRAM

sgP

SLE—

sap

GOt—

inv

)

KRe-2001

CIRCUIT

DESCRIPTION

Description

components.

CONTROL

UNIT

(X11-2230-10)

Components

Application/Function

Operation/Condition/Compatibility

LO/DX

AMP

LOUDNESS

AMP/DET

MPX

CONTROLL

DIN

OUT

AMP

TONE

AMP

SYNTHESIZER

UNIT

(X14-1870-10)

Application/Function

Operation/Condition/Compatibility

AGC

CUT

|_a2_

~_STATION

DeTECT

Tuned

ONWhenthebroadcastsignalisreceved.

}__03,4

BAND-WIDTH

Tuned

ONwhen

SEEK

operation

seeking)

NETS

eel

TUNER

Turned

when

TAPE mode

Q10

Q11,

ACC

AVR

(+9

Q13

TAPE

L.P.F

AMP

BACK

AVR

(+5

CE-CONTROL

MUTING

MUTE

DRIVER

TAPE

MUTE

DRIVER

MUTE

DRIVER

MUTE

DRIVER

AGC

CUT

Turned.

OFF

when

ACC

For

equalizer

amp.

Turned

when

Radio

mode,

FF/REW

mode.

Turned

when

FF/REW

mode

For

power

amplifier.

Turned

when

ACC

ON.

MICROPROCESSOR

POWER

AMP

(1/4)

F/R

indicator,

(2/4)

indicator,

(3/4)

STATION

DETECT

indicator,

(4/4)

TAPE

MODE

indicator

(1/4)

MEMORY

switch,

(2/4)

MANUAL

DOWN

switch,

(3/4)

MANUAL

switch,

(4/4)

SEEK

switch

AND

KRC-2001

CIRCUIT

DESCRIPTION

AND-GATE

FOR

CPU

KEY

MATRIX

OPERATION

DESCRIPTION

7-—-

GND

14*---

Vpp

—

Vpp

Vv)

—

CPU

Key

Matrix

Operation

The

source

clock

from

the

CPU

input

A-input

via

the

AND-GATE

any

time

apply

the

control

signal

B-

input.

When

the

signal

input

B-input,

the

output

goes

high

and

input

the

CPU

key

input.

When

the

B-input

low

level,

output

always

low.

Output

synchro-

nized

with

input

CIRCUIT

DESCRIPTION

Synthesizer

Unit

u.-Com:

«PD

1708G

FUNCTION

OUTLINE

Receiving

frequency,

Channel

spacing,

Reference

frequency,

Intermediate

frequency

band

Frequency

range

Channel

spacing

Reference

frequency

Intermediate

frequency

87.9

~107.9

MHz

200

kHz

10,700

87.50~108.0

MHz

kHz

12.5

kHz

10,700

MANUAL

kHz

band

Frequency

range

Channel

spacing

Reference

frequency

Intermediate

frequency

530

1620

kHz

450

kHz

522~1611

kHz

9kHz 9kHz

450

kHz

163~281

kHz

QkHz

kHz

450

kHz

MANUAL

kHz

Tuning

Function

{1)

Auto

Tuning

(Sawtooth

wave

mode)

Seek

Up:

Once

station

tuned,

held

tuned.

(2)

Manual

Tuning

(Sawtooth

wave

mode)

Manual

Up/Down:

Frequency

advanced

down

steps

pressing

the

push

switch.

Pressing

for

half

second

advances

down

continuously

until

the

switch

released.

(3)

Preset

Memory

Recall

stations

each

FM,

MW,

and

band

can

preset

independently

with

the

buttons.

The

last

sta-

tion

stored

memory

for

each

band

when

power

turned

off.

Tape

Function

(1)

Tape

running

indicator

(2)

METAL

control

(3))

DOLBY

contro!

Radio

Function

(1)

LOC

(local)

contro!

(2)

MONO

control

Clock

Function

(1)

12-hour

display

Other

Functions

(1)

LOUDNESS

control

(2)

(noise

reduction)

control

KAC-2001

CIRCUIT

DESCRIPTION

TERMINAL

DESCRIPTION

Terminal

Configuration

(Top

View)

[+7

[+23

ees

uPD1708G-618-00

p21

(TOP

VIEW)

[_____}

[___}19

C—i*d‘O'V

[715

Name

LCD4

KS,

(PB,}

LCD3

KS,

(PBo)

LCD2

BANDZ/N.R

LCDi

METAL-LOC

COM2

LOUDNESS

COM1

|~|o

lor]

MUTE

(PA3)

BAND

(PA,)

KS,/K;

(PA,)

KS,/K,

(PA,)

KS,

(PB,)

KS,

(PB,)

Not

used.

description

KRG-2001

CIRCUIT

DESCRIPTION

Name

Description

LCD

segment

signal

LCD

segment

signal

output

(1/2

duty,

1/2

bias

LCD

should

used.

Frame

frequency:

100

Hz,

Drive

voltage:

VDD)

LCD

common

signal

LCD

common

signal

output

Power

input

Device

power

supply

pins

During

device

operation,

10%

voltage

supplied

via

these

pins.

Either

them

can

used

for

supplying

the

power

individually.

The

rising

time

VDD

should

less

than

500

4.5

V).

When

the

rising

time

too

long,

when

the

VDD

not

lowered

completely

and

then

raised

4.5

from

the

voltage

lower

than

the

operating

rate,

the

diode

switch

condition

for

initialization

not

read

out

correctly.

such

cases,

use

the

that

the

diode

switch

status

can

read

out

for

initialization.

VCO

input

This

inputs

the

station

output

signal.

Since

incorporates

the

amp,

cut

the

signal

with

the

capacitor.

VCO

input

This

inputs

the

station

output

signal.

Since

incorporates

the

amp,

cut

the

signal

with

the

capacitor.

Ground

Connect

the

ground

terminal

the

set.

Error

Out

MUTE

Charge

pump

output

the

phase

detector

consisting

PLL.

When

the

frequency

divided

the

oscillating

frequency

higher

than

the

reference

frequency,

these

pins

output

high

level

signals,

and

when

lower

than

the

reference

frequency,

they

low.

When

the

frequency

(divided

the

oscillating

frequency)

coincided

with

the

reference

frequency,

enters

into

the

floating

status.

Chip

Enable

Crystal

resonator

Mute

Out

This

pinis

used

input

the

selected

signal

from

the

device.

When

operating

the

PLL

section,

this

goes

high,

and

when

the

PLL

section

stopped,

goes

low.

When

low

level,

the

display

goes

off.

However,

low

level

signal

below

134

high

level

signal

not

accepted.

Connectors

the

crystal

resonator.

Connect

the

4.5

MHz

crystal

resonator.

This

outputs

the

muting

signal

eliminate

shock

noise

when

the

PLL

unlocked

and

pop

noise

when

switching

between

Tape

and

Radio,

and

active

low.

(CMOS

output)

For

timing

details,

refer

the

Mute

Out

Timing

Chart.

When

the

low,

this

active

low.

Band

Out

FM/MW

switching

output

FM:

High

MW:

Low

When

the

MODE

switch

set

“1”

(Tape

mode),

this

low.

When

the

SDK

provided,

the

SDK

section.

Key

return

signal

source

and

Key

return

signal

input

This

becomes

the

source

key

return

signal

read

out

the

diode

matrix

for

initialization

only

when

the

power

turned

for

the

first

time

(rising

time

VDD}

when

the

set

returned

from

the

back-up

condition

(CE:

Low

High).

Then,

this

inputs

the

key

return

signal

for

the

key

matrix.

Insert

the

pull-down

resistor.

(CMOS

input

/output)

Key

return

signal

source

and

Key

return

signal

input

This

becomes

the

source

the

key

return

signal

read

out

the

diode

matrix

for

initialization

only

when

the

power

turned

for

the

first

time

(VDD

rising

time)

when

returning

from

the

back-up

condition

(CE

goes

high

from

low).

Then,

this

inputs

the

key

return

signal

for

the

key

matrix.

Insert

the

pull-down

resistor.

{CMOS

input

/output)

Key

return

signal

input

This

inputs

the

key

return

signal

for

the

key

matrix.

Insert

the

pull-down

resistor.

(CMOS

input)

Key

return

signal

source

This

outputs

the

key

return

signal

for

the

key

matrix.

Since

the

synchronous

current

greatly

lowered

because

its

configuration,

the

reverse-current

prevention

diode

will

not

necessary

for

the

key

source

side.

(CMOS

output)

METAL/DX/LOC

LOC

Out

radio

mode:

DX/Local

On/Off

output

When

“LOC”

displayed

the

LCD

panel,

high

level

signal

output.

When

not

lit,

low

level

signal

output.

(When

the

power

turned

on,

low

level

status

initialized.)

tape

mode:

METAL

On/Off

output

When

“METAL”

displayed

the

LCD

panel,

low

level

signal

output.

When

not

lit,

high

level

signal

output.

initialization

when

the

tape

power

turned

on,

high

level

output.

CIRCUIT

DESCRIPTION

Name

Symbol

Description

LOUDNESS

Loudness

Out

LOUDNESS

output

When

“LOUD”

displayed

the

LCD

panel,

low

level

signal

output.

When

not

lit,

high

level

signal

output.

When

the

power

turned

first

(VDD

rising

time),

low

tevel

signal

output.

(CMOS

output)

BAND2/NR

When

Band

“0”

“1”

and

the

selector

“1”,

this

functions

the

on/off

output

pin.

When

“NR”

dis-

played

the

LCD

panel,

high

level

signal

output.

When

not

lit,

low

level

signal

output.

This

pin.can

operated

the

TAPE/RADIO

mode.

initialization

when

the

power

turned

on,

this

low

level.

When

BAND

“0”,

“1”

and

the

selector

“O”,

this

function

the

WIDE-ADV

on/off

output

pin.

Inthe

Radio

mode:

This

functions

the

WIDE

on/off

output

pin.

When

“WIDE”

displayed

the

LCD

panel,

high

level

signal

output,

and

when

is:

not

lit,

low

level

output.

DOLBY

output

When

“DOLBY”

displayed

the

LCD

panel,

high

level

signal

output.

When

itis

not

lit,

low

level

signal

output.

initialization

when

the

power

turned

on,

low

level

output.

Inthe

Tape

mode:

This

functions

the

ADV

on/off

output

pin.

When

“ADV”

displayed

on the

LCD

panel,

high

level

signal

output,

while

not

lit,

low

level

output.

initialization

when

the

power

turned

first,

low

level.

When

BAND

“0”

and

the

selector

“O”

(SDK

oper-

ation

normal

only

when

this

status),

and

BAND

“1”,

this

functions

the

BAND

output.

BAND

be-

comes

the

band

switching

output

port

combination

with

BAND

Output

BAND

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