Pioneer A-676-G User manual

PIONEER’

The

Art

Entertainment

Setvice

ALEVE

STEREO

AMPLIFIER

A-676-G

Refer

the

service

manual

ARP2240

for

A-676.

This

manual

applicable

A-676-G/HEZ.

A-676-G

the

same

A-676

except

for

color.

CONTRAST

MISCELLANEOUS

PARTS

NOTES:

Part

without

part

number

cannot

supplied.

The

mark

found

some

component

parts

indicates

the

importance

the

safety

factor

the

part.

Therefore,

when

replacing,

sure

use

parts

identical

designation.

Parts

marked

“®”

are

not

always

kept

stock.

Their

delivery

time

may

longer

than

usual

they

may

unavailable.

A-676-G/HEZ

and

A-676/HEWZ

have

the

same

construction

except

for

the

following:

Part

No.

Mark

Symbol

Description

Remarks

‘A-676/HEWZ

A-676-G/HEZ

Rotary

knob

AAB1222

‘AAB1287

Rotary

knob

‘AAB1223

AAB1288

Rotary

konb

AAB1224

‘AAB1289

Push knob

AAD1536

AAD2287

Direct

knob

‘AAD1560

AAD2288

Power

knob

AAD2010

AAD2302

Name

plate

‘AAM1028

Non

supply

Packing

case

AHD2068

AHD2311

Panel

base

AMB1799

AMB2005

Front

panel

ANB1455,

‘ANB1524

Operating

instructions

arcs

ese

(German)

Operating

instructions

nee

ARETI94

(English,

French,

German,

Italian,

Dutch,

Swedish,

Spanish,

Portugues)

Screw

FBT40PO80FZK

FBT40PO80FCR

PIONEER

ELECTRONIC

CORPORATION

4-1,

Meguro

1-Chome,

Meguro-ku,

Tokyo

153,

Japan

PIONEER

ELECTRONICS

SERVICE

INC.

P.O.

Box

1760,

Long

Beach,

California

90801

U.S.A.

PIONEER

ELECTRONICS

CANADA,

INC.

300

Allstate

Parkway

Markham,

Ontario

OP2

Canada

PIONEER

ELECTRONIC

[EUROPE]

N.V._

Haven

1087

Keetberglaan

9120

Melsele,

Belgium

PIONEER

ELECTRONICS

AUSTRALIA

PTY.

LTD.

178-184

Boundary

Road,

Braeside,

Victoria

3195,

Australia

TEL:

[03]

580-9911

PIONEER

ELECTRONIC

CORPORATION

1992

apn,

oop

bated

titeBor

PIONEER’

JOM

The

Art

Entertainment

Service

ORDER

NO.

ARP2240

c/Manual

STEREO

AMPLIFIER

A-676

A-676-S

A-—676

AND

A—676—S

HAVE

THE

FOLLOWING

Model

Power

Requirement

Remarks

A-676

A-676-S

AC220V—230V,

240V

(switchable)

AC220V—230V,

240V

(switchable)

AC110V,

120V—127V,

220V,

240V

(switchable)

HEWZ

AC220V~230V,

240V

(switchable)

Change

the

connection

the

power

transformer

primary

pins.

This

manual

applicable

the

A—676/HE,

HB,

SD,

HEWZ

and

A—676—S/HEWZ

types.

the

HB, SD,

HEWZ

and

A—676—S/HEWZ

types,

refer

page

30.

The

A—676—S

the

same

the

A—

676

except

for

color.

CONTENTS

EXPLODED

VIEWS,

PACKING

AND

FOR

HB,

HEWZ,

AND

A—676-—S/

PARTS

LIST

202

HEWZ

TYPES

----

SCHEMATIC

DIAGRAM

-----

PANEL

FACILITIES

P.C.BOARDS

CONNECTION

DIAGRAM:

SPECIFICATIONS

PCB’s

PARTS

LIST

+25

ADJUSTMENTS

PIONEER

ELECTRONIC

CORPORATION

4-1,

Meguro

1-Chome,

Meguro-ku,

Tokyo

153,

Japan

PIONEER

ELECTRONICS

SERVICE

INC.

P.O.

Box

1760,

Long

Beach,

California

90801

U.S.A.

PIONEER

ELECTRONICS

CANADA,

INC.

505

Cochrane

Drive,

Markham,

Ontario

8E3

Canada

PIONEER

ELECTRONIC

[EUROPE]

N.V.

_Keetberglaan

9120

Beveren,

Belgium

PIONEER

ELECTRONICS

AUSTRALIA

PTY.

LTD.

178-184

Boundary

Road,

Braeside,

Victoria

3195,

Australia

TEL:

[03]

580-9911

Wie

PIONEER

ELECTRONIC

CORPORATION

1991

MAY

1991

Printed

Japan

A-676

EXPLODED

VIEWS,

PACKING

AND

PARTS

LIST

NOTES:

Parts

without

part

number

cannot

supplied.

The

mark

found

some

component

parts

indicates

the

importance

the

safety

factor

the

part.

Therefore,

when

replacing,

sure

use

parts

identical

designa-

tion,

Parts

marked

“®”

are

not

always

kept

stock.

Their

delivery

time

may

longer

than

usual

they

may

unavailable.

Parts

list

Exterior

and

Packing

Mark

No.

Description

Parts

No.

Mark

No.

Description

Parts

No.

ROTARY

KNOBL

(VOLUME)

AAB1222

SPEAKER

SWITCH

ROTARY

KNOB

AABI223

ASSEMBLY

(REC

SELECTOR,

CLAMPER

INPUT

SELECTOR)

STYROL

PROTECTOR

AHA1070

ROTARY

KNOB

(SPEAKERS,

AAB1224

PACKING

CASE

AHD2069

BASS,

TREBLE,

BALANCE,

PACKING

SHEET

PHONO

SELECTOR)

TERMINAL

SCREW

PUSH

KNOB

(LOUDNESS,

AAD1536

PANEL

BASE

AMB1799

ADPT/TAPE3)

FOOT

AMR1159

DIRECT

KNOB

AAD1560

INDICATING

LENS.

AMR1160

HOLDER

AMR1178

POWER

KNOB

AAD2010

REC

OUT

ASSEMBLY

PUSH

JOINT

NAME

PLATE

(METAL)

AAM1029

HEAT

SINK

HOLDER

SCREW

ABA-—298

HEAT

SINK

HOLDER

SCREW

(STEEL)

ABA1004

RIGHT

FRAME

TRANS.

FRAME

SCREW

(STEEL)

ABA1009

SCREW

(STEEL)

ABAIOLIL

FRONT

PANEL

ANB1455

SCREW

(STEEL)

ABA1014

REAR

PANEL

SCREW

(STEEL)

ABA1047

PANEL

STAY

15.

SCREW

(STEEL)

ABA1048

POWER

ASSEMBLY

AWZ3418

BOTTOM

PLATE

SCREW

(STEEL)

ABA1050

SCREW

ABA1056

VOLUME

HOLDER

SCREW

ABA1082

VOLUME

HOLDER

SCREW

ABA1088

ASSEMBLY

20.

SPACER

ABF1002

POWER

ASSEMBLY

HOLDER

®)

WASHER

ABF1017

POWER

ASSEMBLY

HOLDER

SPRING

ABH1033

)

23°

SPRING

ABH1034

EARTH

PLATE

NUT

ABN—065

FLANGE

NUT

ABN—072

TRANSISTOR

HOLDER

HEAT

SINK

~=—

POWER

CORD

ADG1049

HEAT

SINK

CUSHION

(RUBBER)

LONGSHAFT

ASSEMBLY

—

ANL1040

NYLON

BINDER

OPERATING

INSTRUCTIONS

ARE1194

POWER

ASSEMBLY

AW2z3421

(English,

French,

German,

STRAIN

RELIEF

AEC-—882

Italian,

Dutch,

Swedish,

Spanish,

Portuguese)

31.

SPACER

NYLON

RIVET

AECI160

TONE

AMP

ASSEMBLY

AWZ3445

INPUT

SELECTOR

POWER

SUPPLY

ASSEMBLY

AWZ3426

ASSEMBLY

SPEAKER

TERM.

ASSEMBLY

SPACER

PHONO

AMP

ASSEMBLY

AWZ3436

SHEET

AEE1014

BONNET

CASE

AZN1804

Mark

No.

Description

Parts

No.

SCREW

FBT40P080FZK

NUT

NK90FCU

SCREW

VMZ30P060FCU

ELECTROLYTIC

CAPACIT

—ACH1194

(Cl)

FUSE

(T2.5A,

FU3)

AEK-512

~=TRANSISTOR

(Q1)

2SC3281

TRANSISTOR

(Q155)

28C4137

TRANSISTOR

(Q156)

2SC4137

TRANSISTOR

(Q2)

28C3281

~—-

TRANSISTOR

(Q3)

2SA1302

81.

TRANSISTOR

(Q4)

2SA1302

82.

PUSH

SWITCH

(S1)

ASG1006

SWITCH

(S2)

ASU1039

SWITCH

(S3)

ASU1038

SWITCH

(S4)

ASU1026

86.

«POWER

TRANSFORMER

(T1)

ATS1352

iC)

ASSEMBLY

AWZ3441

HEAD

PHONE

ASSEMBLY

DIODE

ASSEMBLY

SCREW

ABA1129

WASHER

ABE-053

Packing

Exterior

A-676

type

only

type

only

socket

(AKP—515)

(AKX—507)

3 °

a-676

SCHEMATIC

DIAGRAM

PHONO

AMP

bly

(AWZ3436)

PHONO

TAPER

PLAY

TAPE1

PLAY

TUNER

LINE

POWER

assem

bly

(AWZ3421)

POWER

SUPPLY

assembly

(AWZ3426)

assembly

(1/2)

(AWZ3441)

SPEAKER

TERM.

assembly

[HEAD

PHONE

assembly

SPEAKER

SWITCH

assemb!

“ie

e136

DIODE

assembly|

POWER

assembly

(AWZ3421)

ss.

398-4

T|aSSi

POWER

SUPPLY

assembly

(AWZ3426)

assembly

(2/2)

(AWZ3441)

POWER

SUPPLY

SECTION

(SD

type)

‘A

POWER

TRANSFORMER

Cie

VoLTAGe_seuecror!

Cite

Vourace_sevecr

ant

(zai

ony

—

des

piplele

POWER

SUPPLY

assembly

(AWZ3426)

aig)

Aétoos

Arcotiol|

$837

ogy

FUSS

p13

piz pis

yyswirenen|

swvzcneo

POWER

CORO

yew S00

aww

sSa

ost

“<

prow

Sersore

EER

RESISTORS:

Indicated

%W,

YeW,#5%

tolerance

unless

otherwise

noted

:k®,

imme

MO,

(F)

£1%,

(G)

#2%,

(K)

10%

(M);

+20%

tolerance

CAPACITORS:

Indicated

capacity

(uF)/voltage

(V)

unless

otherwise

noted

Indication

without

voltage

50V

except

electrolytic

capacitor.

VOLTAGE, CURRENT:

Signal

voltage

(WW

—

8)output

(1kHz)

voltage

(V)

input

signal

Value

(

voltage

rated

power.

mA:

current

input

signal

LINE

VOLTAGE

SELECTION

OTHERS:

(For

A—676/HE,

,HEWZ

and

Signal

route.

A-—676—S/HEWZ

types.)

Adjusting

point.

The

Hed

found

some

component

parts

indicates

the im-

Line

voltage

can

changed

with

the

following

steps.

jortance

the

safety

factor

the

part.

Therefore,

when

replacing,

sia

aie

eae

Disconnect

the

Power

cord.

sure

use

parts

identical

designation.

marked

capacitors

and

resistors

have

parts

numbers.

Remove

the

top

cover.

Change

the

connection

the

power

transformer

primary

wes

This

the

basic

schematic

diagram,

but

the

actual

circuit

may

vary

pins.

due

improvements

design.

Voltage

Power

transformer

No.

‘SWITCHES:

220V

POWER

240V

TONE

AMP

assembly

Stick

301

TAPES

ON/OFF

the

line

voltage

label

thé

rear

panel.

$302

LOUDNRSS

ON/OFF

Part

No.

Description

SPEAKER

SWITCH

assembly

$401

SPEAKER

A,B(OFF/A/B/A+B)

AAX—193

220V

label

AAX—192

240V

label

INPUT

SELECTOR

assembly

S701

INPUT

SELECTOR

$702

REC

SELECTOR

S703

DIRECT

PHONO

AMP

assembly

$501

PHONO

SELECTOR

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