Akai AM-M459 Bedienungsanleitung

AKAT

servic

STEREO

INTEGRATED

AMPLIFIER

AM-M459

VOLUME

{-¢81

MUTING

REMOTE

SENSOR

TREBLE

DAT

VOR

SOURCE

DIRECT

DAT/VCR

WIRELESS

REMOTE

CONTROL

SYSTEM

MOTOR

DAIVE

VOL

UME

CONTROL

AKALT

one

wrecrsten

aveunen

aves

VOLUME

(-a8)

POWER

MUTING

REMOTE SENSOR

PHONES

TREBLE

BALANCE

SOUACE

DIRECT

DAT/VCR

DIGITAL

SOPTICAL

INTERFACE

SYSTEM

DIGIT.

FiGH

GUALITY

O/A

CONVERTER

MODEL

AM-M659

STEREO

INTERGRATED

AMPLIFIER

MODEL

AM-M45

DIGITAL

INTERGRATED

AMPLIFIER

mon.

AM-M659

SAFETY

INSTRUCTIONS

PRECAUTIONS

DURING

SERVICING

Parts

identified

the

symbol

parts

are

critical

for

‘safety.

Replace

only

with

parts

number

specified.

addition

safety,

other

parts

and

assemblies

are

specified

for

conformance

with

such

regulations

those

applying

spurious

radiation.

These

must

also

replaced

only

with

specified

replacements.

Examples:

converters,

tuner

units,

antenna

selector

switches,

cables,

noise

blocking

capacitors,

noise

blocking

filters,

etc.

Use

specified

internal

wiring.

Note

especially:

Wires

covered

with

PVC

tubing

Double

insulated

wires

High

voltage

leads

Use

specified

insulating

materials

for

hazardous

live

parts.

Note.

especially:

Insulation

Tape

PVC

tubing

Spacers

(Insulating

Barriers)

Insulation

sheets

for

transistors

Plastic

screws

for

fixing

microswitch

(especially

turntable)

When

replacing

primary

side

components

(transform-

ers,

power

cords,

noise

blocking

capacitors,

etc.),

wrap

ends

wires

securely

about

the

terminals

before

soldering.

Observe

that

wires

not

contact

heat

producing

parts

(heatsinks,

oxide

metal

film

resistors,

fusible

resistors,

etc.).

INFORMATION

Check

that

replaced

wires

not

contact

sharp

edged

pointed

parts.

Also

check

areas

surrounding

repaired

locations.

Use

care

that

foreign

objects

(screws,

solder

droplets,

etc.)

not

remain

inside

the

set.

SAFETY

CHECK

AFTER

SERVICING

Confirm

the

specified

insulation

resistance

between

power

cord

plug

prongs

and

externally

exposed

parts

the

set

greater

than

ohms,

but

for

equipment

with

external

antenna

terminals

(tuner,

receiver,

etc.)

and

intended

for

Specified

insulation

resistance

should

head-

phone

jacks,

line-in-out

jacks,

etc.

than

2.2

ohms

(ground

terminals,

microphone

jacks).

PRECAUTIONS

FOR

LITHIUM

BATTERY

The

lithium

battery

may

explode

when

heated

excessively.

[OBSERVE

THE

FOLLOWING

WHEN

REPLACING]

Replace

with

the

same

make

and

type

only.

Use

soldering

iron

“recommended

way”

only.

Place

battery

correct

polarity.

®@

not

short

the

terminals.

not

recharge

battery.

not

dispose

battery

fire.

[DANGER]

[RECOMMENDED

WAY]

SYMBOLS

FOR

PRIMARY

DESTINATION

Alphabet

indicates

the

destination

the

units

listed

below.

Symbols

Principal

Destinations

[A]

USA

[a]

vuK

[c]

Canada

LE]

Europe

(except

UK)

[3]

Japan

[s]

[

Australia

[Vv]

Germany

only

[u]

Universal

Area

Custom

version

VOLTAGE

CONVERSION

([U]

Model

only)

Before

connecting

the

power

cord,

SET

the

VOLTAGE

SELECTOR

located

the

rear

plate

with

screw-driver

that

the

correct

voltage

indicated.

nn,

SERVICE

MANUAL

—————_—_

SPECIFICATIONS

1-1

MODEL

AM-M459

Power

output

DIN

(1kHz,

ohms)

40W

Music Power

Power

bandwidth

S/N

(THF-A)

PHONO

TUNER

etc

Residual

noise

Channel

separation

5Hz

80kHz/0.1%

Damping

Factor

kHz,

ohms)

Required

speaker

impedance

ohms

Input

sensitivity/

impedance

PHONO

2mV/47kohms

TUNER

etc

150mV/47kohms

PHONO

max

input

level

Frequency

response

eigutiticesares

+0.5dB

(RIAA)

TUNER

etc

10Hz

50kHz

(-3dB,

source

direct)

Tone

control

Bassiics

cis

ethisecsetes

+8.5dB

100Hz

Treble

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

+8.5dB

10kHz

power

supply

(for

PHONO)

12V

(center—)

Power

requirements

220V,

50Hz

for

Europe

except

240V,

50Hz

for

and

Austraria

110V/220V/220V/240V,

50Hz/60Hz

Convertible

for

other

countries

Power

consumption

145W

for

model

Dimensions

350

(W)

136

(H)

360

(D)

Standard

accessories

Wireless

remote

control

Dry

batteries

(R6,

DC1.5V)........

sadebesoesen

For

improvement

purposes,

specifications

and

design

are

subject

change

without

notice.

1-2

MODEL

AM-M659

Power

output

DIN

(1kHz,

ohms)...

55W

Music

Power

bandwidth

S/N

(THF-A)

PHONO

TUNER

etc

Residual

noise

Channel

separation

Damping

Factor

kHz,

ohms)

Required

speaker

impedance

ohms

Input

sensitivity/

impedance

PHONO

2mV/47kohms

TUNER

etc

150m

V/47kohms

Digital

input

level

(CD-OPTICAL)

—22

dBm

PHONO

max

input

level

Output

level/impedance

150

mV/1

kohms

Frequency

response

dena

Conetehasutes

+0.5dB

(RIAA)

TUNER

etc

10Hz

50kHz

(-3dB,

source

direct)

Tone

control

+8.5dB

100Hz

Treble

................000

+8.5dB

10kHz

Power

requirements

220V,

50Hz

for

Europe

except

240V,

50Hz

for

and

Austraria

110V/220V/220V/240V,

50Hz/60Hz

Convertible

for

other

countries

Power

consumption

185W

for

model

Dimensions

350

(W)

137

(H)

360

(D)

Standard

accessories

Wireless

remote

control

Dry

batteries

(R6,

DC1.5V)...

For

improvement

purposes,

specifications

and

design

are

subject

change

without

notice.

SERVICE

MANUAL

pliers

sae

ahs:

CONTROLS

2-1

MODEL

AM-M459

VOLUME

(-aB!

9090

POWER

Button

turn

the

power

and

off.

MUTING

Indicator

Lights

when

the

remote

control’s

MUTE

button

turned

on.

The

vo-

lume

attenuated

—20

fromthe

set

volume

level.

REMOTE

SENSOR

Window

The

signals

from

the

remote

control

are

received

this

window.

Keep

this

window

clean.

VOLUME

Control

and

Indicator

(Mo-

tor

driven

for

remote

control

opera-

tion)

adjust

the

volume

level.

Input

Source

Indicators

(TUNER,

PHONO,

CD,

TAPE,

DAT/VCR)

Tells

you

the

amplifier

turned

and

which

playback

source

select-

ed.

SOURCE

DIRECT

Button

and

Indi-

cator

When

engaged,

the

input

signal

by-

passes

the

BASS,

TREBLE

and

BAL-

ANCE

control

for

optimum

sound

quality

playback.

The

indicator

lights

when

the

SOURCE

DIRECT

button

turned

on.

Input

Select

Buttons

(TAPE,

DAT/

VCR,

TUNER,

PHONO,

CD)

select

playback

recording

source

you

wish

listen

to.

BALANCE

Control

(LEFT/RIGHT)

adjust

the

left

and

right

channel

volume

balance.

TREBLE

Tone

Control

adjust

the

high

note

(treble)

level.

When

set

the

control

has

ef-

fect.

wrecess/emMore

contac

</stem

moron

Juve

vo.ume

CONT)

@®

BASS

Tone

Control

adjust

the

low

note

(bass)

level.

When

set

the

control

has

ef-

fect.

PHONES

Jack

Connect

the

headphones

plug

this

jack

for

private

listening.

When

connecting

the

plug,

the

speaker

output

will

cut

automati-

Cally.

SERVICE

MANUAL;

—————=——

2-2

MODEL

AM-M659

err.

man

Guapry

o/a

conven/en

®o

POWER

Button

turn

the

power

and

off.

MUTE

Indicator

Lights

when

the

MUTE

button

the

remote

control

unit

turned

on.

The

volume

attenuted

—20

(to

1/10).

Remote

Sensor

Window

The

signals

from

the

remote

control

are

received

this

window.

Keep

this

window

clean.

DIGITAL

Indicator

Tells

you

the

amplifier

the

mode.

this

case,

playback

signals

are

received

the

digital

input.

VOLUME

Control

adjust

the

volume

level.

DIGITAL

INTEGRATED

AMPLIFIER

AM-M659

Input

Source

Indicators

(TAPE,

DAT/VCR,

TUNER,

CD,

PHONO)

Tells

you

the

amplifier

turned

and

which

playback

source

select-

ed.

SOURCE

DIRECT

Button

and

Indi-

cator

When

engaged,

the

input

signal

by-

passes

the

BASS

and

TREBLE

tone

controls

for

optimum

sound

quality.

The

indicator

lignts

when

the

SOURCE

DIRECT

button

turned

on.

Input

Select

Buttons

(TAPE,

DAT/

VCR,

TUNER,

CD,

PHONO)

select

playback

recording

source

you

wish

listen

to.

BALANCE

Control

(LEFT/RIGHT)

adjust

the

volume

balance

the

left

and

right

channels.

SERVICE

MANUAL

9e9o

Gexer]

ongl[_co_]

CCA)

0 0

TREBLE

Tone

Control

adjust

the

high

note

(treble)

level.

When

set

the

control

has

ef-

fect.

BASS

Tone

Control

adjust

the

low

note

(bass)

level.

When

set

the

control

has

ef-

fect.

PHONES

Jack

Connect

the

headphone

plug

this

jack

for

private

listening.

When

connecting

the

plug,

the

speaker

output

will

cut

automati-

Cally.

ill.

DISASSEMBLY

eee

case

trouble,

etc,

necessitating

dismantliag,

please

dismantle

the

order

shown

the

photographs.

Reassemble

reverse

order.

Photographs

employed

this

paragraph

are

model

AM-M659

Removal

UPPER

COVER

“Seca

FIXING

NUTS

ali

[ese

FRONT

PANEL

KNOBS

REMOVE

THE

FOUR

KNOBS,

AND

REMOVE

FOUR

VOLUME

FIXING

NUTS.

Removal

FRONT

PANEL

and

BOTTOM

COVER

Removal

CONTROL

PCB

FRONT

PANEL

FRONT

PANEL

CONTROL

PCB

BOTTOM

COVER

SERVICE

MANUAL

———————___

IV.

PRINCIPAL

PARTS

LOCATION

4-1

MODEL

AM-M459

POWER

PCB

POWER

TRANSFORMER

T501

MAIN

PCB

PHONE

PCB

CONTROL

PCB

REMOTE

PCB

VOLUME

PCB

LED

PCB

Fig

4-1

SERVICE

MANUAL

4-2

MODEL

AM-M659

POWER

PCB

POWER

TRANSFORMER

T501

MAIN

PCB

D/A

PCB

PHONE

PCB

CONTROL

PCB

REMOTE

PCB

VOLUME

PCB

LED

PCB

Fig

4-2

nem

SERVICE

MANUAL

ADJUSTMENT

(model

Am-mM659

only)

5-1

ADJUSTMENT

PLL

CIRCUIT

NOTE:

When

adjusting

step

(VCO

CONTROL

VOLTAGE),

Remove

the

Shield

cover

before

adjustement.

REAR

VIEW

FROM

PARTS

SIDE

CONTROL

LTAGE,

——~)

ADy

145}!

(a5)

D/A

PCB

Fig

5-1

Test

and

adjustment

Point

Adjustment

Item

Test.

Point

Result

and

Remarks

Connect

the

player

(at

STOP

mode)

which

has

OPTICAL

OUTPUT

such

CD-M659

OPTICAL

INPUT.

Connect

oscilloscope

TP.CV

and

adjust

(CONTROL

VOLTAGE

ADJ)

that

the

voltage

the

oscilloscope

DC2.4

2.5

Fig

5-2

VCO

CONTROL

VOLTAGE

Fig.

5-2

Connect

the

player

(at

STOP

mode)

which

has

OPTICAL

OUTPUT

such

CD-M659

OPTICAL

INPUT.

Connect

oscilloscope

TP.VAR

and

adjust

VR1

(PLL

ADJ)

that

the

timing

waveform

the

oscilloscope

50ns

Fig

5-3.

SERVICE

MANUAL

VI.

PARTS

LIST

HOW

USE

THIS

PARTS

LIST

This

Parts

List

lists

those

parts

which

are

considered

necessary

for

repairs.

Other

common

parts,

such

resistors

and

capacitors,

are

listed

the

“Common

List

for

Service

Parts”

from

which

these

parts

should

selected

and

stocked.

The

Recommended

Spare

Parts

List

shows

those

parts

the

Parts

List

which

are

considered

particularly

important

for

service.

Parts

not

shown

the

Parts

List

and

“Common

List

for

Service

Parts”

will

not

principle

supplied.

How

read

the

Parts

List.

Mechanism

Block

Board

HEAD

BASE

BLOCK

MAIN

BOARD

REF

REF.

No.

PART

NO.

DESCRIPTION

No:

PART

NO.

DESCRIPTION

2-1x

BH-T2023A320A

HEAD

BASE

BLOCK

6-IC1

EI-324536

HD14049BP

2-2

HP-H2206A010A

HEAD

R/P

PR4-8FU

6-IC2

_—_—EI-336801

MB8841-564M

2-3

ZS-477876

PAN20x03STL

CMT

6-C1A

—EC-338399|

MMY

223M

250AC

[U,E,B,S]

2-4

ZS-536488

BID20x08STL

CMT

6-C1B

EC-350949|

MMY

223M

250DC

[J]

2-5

ZG-402895

ANGLE

ADJUST

6-C1C_

—_

EC-338397_

MMY

223M

125AC[C,A]

6-X1

EI-318384

OSC

X’TAL

NC-18C

(Service

Parts)

Classification

Symbols

for

primary

destination

small

“x”

indicates

that

this

part

not

[A]:

AAL(U.S.A.)

[S]:

SAA

(Australia)

shown

the

Photo

IIlustration

(B]:

BEAB(England)

[U]:

U/T(Universal

Area)

[C]:CSA(Canada)

[V]:

VDE(W.

Germany)

———

This

number

corresponds

with

the

indi-

[E]:CEE(Europe)

[Y]:Custom

Version

vidual

parts

index

number

that

figure.

[J]:

JPN(Japan)

This

number

corresponds

with

the

Figure

(Service

Parts)

Classification

Number.

These

reference

symbols

correspond

with

component

symbols

the

Schematic

Diagrams.

The

available

Board

Blocks

are

listed

separately.

When

Part

No.

known,

Parts

Index

end

Parts

List

can

used

locate

where

that

part

shown

Parts

List

its

Reference

No.

listed

right

Part

No.

CONTINUED

LACE

SAFETY

£.

POUR

MAINTENIR

DEGRE

TECES

RECOMMANDEES

PAR

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