Akai AM-2600 Bedienungsanleitung

AKAI

STEREO

INTEGRATED

AMPLIFIER

move.

AM-2600

SECTION

SERVICEMANUAL

..............-00e0000-

SECTION

PARTS

LIST

.........

cccccecececeecees

SECTION

SCHEMATIC

DIAGRAM.

...................24

SECTION

SERVICE

MANUAL

TABLE

CONTENTS

TECHNICAL

DATA:

cs:i

Sdn

gehik

etd

hacen

eee

wae

Sard

ene die

MAE

eee

Il.

DISMANTLING

UNIT

20...

eee

reer

eee

nee

ene

nena

Ill.

CONTROUS

oes

5.8

BARE

RIS

MAAS

are

Thales

etaes

dee

EARLY

PRINCIPAL

PARTS

LOCATION...

1...

occ

een

ees

LEVEL,

DIAGRAM)

-))

h04

tare

cree

eee

bide

dag

dele

Rae

VI.

MAIN

AMPLIFIER

ADJUSTMENT...

ene

eee

nee

eaee

IDLING

CURRENT

ADJUSTMENT

oo.

eee

een

eens

LEVEL

METER

ADJUSTMENT...

eee

nnn

nee

eens

Vil.

CLASSIFICATION

VARIOUS

P.C

BOARDS

.....

0...

ees

RELATION

P.C

BOARD

TITLE

AND

IDENTIFICATION

NUMBER

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

COMPOSITION

VARIOUS

P.C

BOARDS

.....

1...

oes

For

basic

adjustments,

measuring

methods,

and

operating

principles,

refer

GENERAL

OPERATING

PRINCIPLES

AND

ADJUSTMENTS.

TECHNICAL

DATA

POWER

AMPLIFIER

SECTION

CONTINUOUS

POWER

OUTPUT

—

2-CHANNELS

DRIVEN

with

than

0.1%

total

harmonic

distortion.

POWER

BANDWIDTH

(IHF)

kHz/8

ohms

(Total

Harmonic

Distortion:

0.1%)

SIGNAL

NOISE

RATIO

(IHF)

PHONO

Better

than

___AUX

Better

than

RESIDUAL

NOISE

Less

than

0.5

ohms

CHANNEL

SEPARATION

(IHF)

___

PHONO

Better

than

dBat1,000Hz

DAMPING

FACTOR

than

60(1kHz,8

ohms)

OUTPUT

SPEAKERS

ohms)/A+B

(

ohms)

HEADPHONE

ohms

POWER

INDICATOR

METERS

(2)

3/80W

switchable

;

PREAMPLIFIER

SECTION

INPUT

SENSITIVITY

/IMPEDANCE

PHONO

AUX

TUNER

Phono

mV/33,

100

ohms

Phono

mV/50

ohms

150

mV/100

ohms

150

mV/100

ohms

TAPE

MONITOR

PIN:

150

mV/100

ohms

;

DIN:

150

mV/100

ohms.

OUTPUT

LEVEL/IMPEDANCE

TAPE

REC

PIN:

150

mV/100

ohms

DIN:

mV/180

ohms

FREQUENCY

RESPONSE

PHONO

(RIAA

EQUALIZATION)

TUNER,

AUX,

TAPE

MONITOR

kHz

+0.8

dB,

—0.8

kHz

dB,

-1

TONE

CONTROL

BASS

dB at

100

TREBLE

dBat

kHz

LOUDNESS

CONTROL

+10

100

Hz,

kHz

(High

Position)

+10

100

(Low

Position)

(Volume

Control

set

—30

position)

FILTER

HIGH

—5

dBat

kHz

position)

—3 dB

kHz

(10

kHz

position)

LOW

—2

(30

position)

eee

—6

(60

position)

MISCELLANEOUS

SEMICONDUCTORS

Transistors:

Diodes:

POWER

REQUIREMENTS

DIMENSIONS

CSA,

and

models:

120V,

CEE

models:

220V,

Other

models:

110/220/240V,

50/60

switchable

440(W)

141(H)

331(D)mm,

(17.3

5.6

inches)

WEIGHT

(22

lbs)

For

improvement

purposes,

specifications

and

design

are

subject

change

without

notice.

lt.

DISMANTLING

UNIT

case

trouble,

etc.

necessitating

disassembly,

please

disassemble

the

order

shown

photographs.

Reassemble

reverse

order.

SCREWS

[

CABINET

SCREWS

BOTTOM

PLATE

FRONT

PANEL

SCREWS

CONTROL

KNOBS

il.

CONTROLS

NRO

oOnN

OO FW

SPEAKER

SYSTEM

SELECTOR

OUTPUT

POWER

LEVEL

METERS

(Left

and

Right)

METER

SWITCH

MODE

SWITCH

LOUDNESS

SWITCH

VOLUME

CONTROL

STEREO

BALANCE

CONTROL

INPUT

SELECTOR

POWER

SWITCH

10.

11.

2s.

13.

14.

15.

16.

17.

18.

HEADPHONE

JACK

AUDIO

MUTE

SWITCH

LOW

FILTER

SWITCH

HIGH

FILTER

SWITCH

TONE

SWITCH

BASS

TONE

CONTROL

TREBLE

TONE

CONTROL

POWER

INDICATOR

LAMP

TAPE

MONITOR

SWITCH

Fig.

Controls

IV.

PRINCIPAL

PARTS

LOCATION

LEFT

HEAT

SINK

POWER

SWITCH

Swg0l

FUSE

TERMINAL

POWER

TRANSFORMER

CAPACITOR

C902

,903

iIOOOOpF

63V

ara

TAPE

BOARD

M2-5435

SPEAKER

SYSTEM

sw90

£Q

AMP

BOARD

M2-

5617A

_[e|_-

TONE

CONTROL

BOARD

M2-5618

POWER

LEVEL

METER

LEFT

M901

SELECTOR

POWER

LEVEL

METER

RIGHT

M902

HEADPHONE

JACK

J90I

'__

AUDIO

MUTE

SWITCH

SW4

MAIN

AMP

BOARD

M2-

5432A

RIGHT

HEAT

SINK

BASS

TONE

TREBLE

TONE

CONTROL

VRI

TONE

SWITCH

SWI

“—-HIGH

FILTER

SWITCH

SW3

————e

}

-—

BOARD

M2-5619

Fig.

Top

View

METER

SWITCH

SW3

-—MODE

SWITCH

SWI

-—LOUDNESS

SWITCH

SW2

BALANCE

CONTROL

VRIA

VOLUME

CONTROL

INPUT

SELECTOR

VRIB

swt

LED

BOARD

TAPE

MONITOR

SWITCH

M2-5617C

CONTROL

VR2

POWER

INDICATOR

“—

LOW

FILTER

SWITCH

Sw2

Fig.

Front

View

LEVEL

DIAGRAM

LEVEL

~20

-40

-50

AUX

TAPE

MONITOR

(PIN)

TAPE

MONITOR

(DIN)

PHONO

SPEAKER

CONTROL

AMP

MAIN

AMP

HEADPHONES

_—

TAPE

REC(PIN)

TAPE

REC(DIN)

SPEAKER

OUTPUT

(29dB)

TAPE

MONITOR(DIN)!

AUX,

TUNER

TAPE

MONITOR(PIN):

150mA

(-14dB)

(EQ

AMP)

{

22V/8

OHMS

(MAIN

AMP)

HEADPHONES

(4¢4B)

0.77V/

OHMS

(0dB)

(CONTROL

AMP)

TAPE

REC

(PIN)

1SOmv

(-14dB)

TAPE

REC(DIN)

30mv

(-28dB)

PHONO

3mvV

FREQUENCY

[kHz

(-48dB)

Fig.

Level

Diagram

Model

AM-2600

VI.

MAIN

AMPLIFIER

ADJUSTMENT

IDLING

CURRENT

ADJUSTMENT

TESTER

IDLING

CURRENT

ADJ

CHANNEL

)

elie

Connect

tester

Power

Amp.

P.C

Board

test

point

between

Pin-11

and

Pin-12,

and

between

Pin-29

and

Pin-28.

Adjust

semi-fixed

resistors

VR-la,

VR-1b

until

the

volt-

age

mV.

LEVEL

METER

ADJUSTMENT

SPEAKER

OUTPUT

VOLTMETER

Aubio

osc

IKHz

Fig.

Level

Meter

Adjustment

Connect

instruments

shown

Fig.

Turn

volume

control

knob

the

front

panel

until

the

voltmeter

indicates

4.9

volts

watts).

Adjust

VR-3a,b

that

level-meter

indicates

watts.

(Refer

Fig.

TESTER

IDLING

CURRENT

ADJ

CHANNEL)

(4)

TREb

TR3b

TRIb

TR4b

<<)

TR7b

270

026

Fig.

Main

Amp.

P.C

Board

M2-5432A

Fig.

Volume

P.C

Board

M2-5619

Vil.

CLASSIFICATION

VARIOUS

P.C

BOARDS

RELATION

P.C

BOARD

TITLE

AND

IDENTIFICATION

NUMBER

Board

Title

- ;

;

Board

Number

"Main

Amplifier

PCBoard

_—

M25432

;

Tone

Control

P.C

Board

M2-5618

Equalizer

P.C

Board

;

M2-5617

Volume

P.C

Board

Loe

M2-5619

Tape

P.C

Board

M2-5435_

Chart-1

COMPOSITION

VARIOUS

P.C

BOARDS

MAIN

AMPLIFIER

P.C

BOARD

M2—5432

2ED

BdAj

344

3WVS

3H1

ISMW

Zd1

GNY

INL

(PSWHOOLZ

Mb/l(S5)]

198

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(43)

e1g0sz

creas

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