Akai AM-2600 Guida alla risoluzione dei problemi

RTV

servis

Horvat

Kesinci,

31402

Semeljci

;

Tel:

031-856-637

Tel

fax

031-856-139

Mob:

098-788-319

^[email protected]

AKAI

STEREO

INTEGRATED

AMPLIFIER

MODEL

AM-2600

SECTION

SERVICE

MANUAL

...

SECTION

PARTS

LIST

SECTION

SCHEMATIC

DIAGRAM

SECTION

SERVICE

MANUAL

TABLE

CONTENTS

TECHNICAL

DATA

II.

DISMANTLING

UNIT

III.

CONTROLS

IV.

PRINCIPAL

PARTS

LOCATION

LEVEL

DIAGRAM

VI.

MAIN

AMPLIFIER

ADJUSTMENT

IDLING

CURRENT

ADJUSTMENT

...7

LEVEL

METER

ADJUSTMENT

VII.

CLASSIFICATION

VARIOUS

P.C

BOARDS.8

RELATION

P.C

BOARD

TITLE

AND

IDENTIFICATION

NUMBER

COMPOSITION

VARIOUS

P.C

BOARDS.9

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

watts

per

channel,

minimum

RMS,

ohms

from

20,000

with

than

0.1%

total

harmonic

distortion.

POWER

BANDWIDTH

(IHF)

kHz/8

ohms

(Total

Harmonic

Distortion:

0.1%)

SIGNAL

NOISE

RATIO

(IHF)

PHONO

AUX

Better

than

Better

than

RESIDUAL

NOISE

Less

than

0.5

ohms

CHANNEL

SEPARATION

(IHF)

PHONO

Better

than

1,000

DAMPING

FACTOR

than

kHz,

ohms)

OUTPUT

SPEAKERS

HEADPHONE

POWER

INDICATOR

METERS

(

ohms)/A+B

(

ohms)

ohms

(2)

3/80W

switchable

PREAMPLIFIER

SECTION

INPUT

SENSITIVITY/IMPEDANCE

PHONO

AUX

TUNER

TAPE

MONITOR

Phono

mV/33,

100

ohms

Phono

mV/50

ohms

150

mV/100

ohms

150

mV/100

ohms

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

TREBLE

±9

100

±9

kHz

LOUDNESS

CONTROL

+10

100

Hz,

kHz

(High

Position)

+10

100

(Low

Position)

(Volume

Control

set

—30

position)

FILTER

HIGH

LOW

—5

kHz

position)

—3

kHz

(10

kHz

position)

—2

(30

position)

—6

(60

position)

MISCELLANEOUS

SEMICONDUCTORS

Transistors:

Diodes:

POWER

REQUIREMENTS

CSA,

and

models:

120V,

CEE

models:

220V,

Other

models:

110/220/240V,

50/60

switchable

DIMENSIONS

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.

DISMANTLING

UNIT

BOTTOM

PLATE

■

;

■

’

Fwl

•-'••***••*»

♦

»«“!>»

■

*,»*

'&»'

III.

CONTROLS

Fig.

Controls

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.

HEADPHONE

JACK

AUDIO

MUTE

SWITCH

LOW

FILTER

SWITCH

HIGH

FILTER

SWITCH

14.

TONE

SWITCH

15.

BASS

TONE

CONTROL

16.

TREBLE

TONE

CONTROL

17.

POWER

INDICATOR

LAMP

18.

TAPE

MONITOR

SWITCH

IV.

PRINCIPAL

PARTS

LOCATION

Fig.

Front

View

LEVEL

DIAGRAM

VI.

MAIN

AMPLIFIER

ADJUSTMENT

IDLING

CURRENT

ADJUSTMENT

Fig.

Main

Amp.

P.C

Board

2-5

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-lb

until

the

volt¬

age

mV.

LEVEL

METER

ADJUSTMENT

Fig.

Volume

P.C

Board

M2-5619

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.

VII.

CLASSIFICATION

VARIOUS

BOARDS

RELATION

BOARD

TITLE

AND

IDENTIFICATION

NUMBER

P.C

Board

Title

...]

P.C

Board

Number

Main

Amplifier

P.C

Board

M2-5432

Tone

Control

P.C

Board

M2-5618

Equalizer

P.C

Board

M2-5617

Volume

P.C

Board

M2-5619

Tape

P.C

Board

M2-5435

Chart—1

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