JVC A-GX1 Manuel utilisateur

A-GX1/A-GX1B

JVC

SERVICE

MANUAL

A-GX1

Silver

Contents

Page

Safety

PrecalitiOns

siiccamiseteeraietencteies,

SPST

BIOCK

DidGraM

iivisincsi

carinii

ease.

Service

PreCautiOns...........cccssccccssssssserescceessscrseeseesnceee,

Wiring

Diagiam

Aine

aun.

“TSO

‘SbSCHICATIONS

acs

ancdimiastitcunewne

meena.

Schematic

Diagram

Removal

and

Reassembly

Procedures..................

1-3

Parts

List.........c

eee,

S@Parate-volun

€

Insertion

No,

2810

This

manual

combines

two

single

volumes;

Service

manual

and

Parts

list.

Feb

1985

\-GX1/A-GX1B

Safety

Precautions

The

design

this

product

contains

special

hardware,

duct

safe

operate

without

danger

electrical

many

circuits

and

components

specially

for

safety

pur-

poses.

For

continued

protection,

changes

should

made

the

original

design

unless

authorized

writing

the

manufacturer.

Replacement

parts

must

identical

those

used

the

original

circuits.

Service

should

performed

qualified

personnel

only.

Alterations

the

design

circuitry

the

product

should

not

made.

Any

design

alterations

addi-

tions

will

void

the

manufacturer's

warranty

and

will

further

relieve

the

manufacturer

responsibility

for

personal

injury

property

damage

resulting

therefrom.

Many

electrical

and

mechanical

parts

the

product

have

special

safety-related

characteristics.

These

char-

acteristics

are

often

not

evident

from

visual

inspection

nor

can

the

protection

afforded

them

necessarily

obtained

using

replacement

components

rated

for

higher

voltage,

wattage,

etc.

Replacement

parts

which

have

these

special

safety

characteristics

are

identified

the

parts

list

Service

manual.

Electrical

compo-

nents

having

such

features

are

identified

shading

the

schematics

and

(

)

the

parts

list

Service

manual.

The

use

substitute

replacement

which

does

not

have

the

same

safety

characteristics

the

re-

commended

replacement

part

shown

the

parts

list

Service

manual

may

create

shock,

fire,

other

hazards.

The

leads

the

products

are

routed

and

dressed

with

ties,

clamps,

tubings,

barriers

and/or

the

sep-

arated

from

live

parts,

high

temperature

parts,

moving

parts

and/or

sharp

edges

for

the

prevention

electric

shock

and

fire

hazard.

When

service

required,

the

original

lead

routing

and

dress

should

observed,

and

they

should

con-

firmed

returned

normal,

after

reassembling.

Leakage

current

check

(Safety

for

electrical

shock

hazard)

After

reassembling

the

product,

always

perform

iso-

lation

check

the

exposed

metal

parts

the

Products

(antenna

terminals,

Knobs,

metal

cabinet,

screw

heads,

headphone

jack,

control

shafts,

etc.)

sure

the

pro-

Service

Precautions

Before

repairing,

sure

discharge

the

large

electro-

lytic

Capacitors

across

resistor

about

100

ohms/1

watt.

When

disassembling

When

replacing

power

transistor

IC,

sure

apply

silicone

grease

the

section

new

transistor

whichis

contact

with

the

heatsink,

then

mount

it.

1-1

(No.

2810)

CHECKING

YOUR

LINE

VOLTAGE

(For

U.S.

Military

Market

and

Other

Countries)

Before

inserting

the

power

plug,

please

check

this

setting

see

that

corresponds

with

the

line

voltage

your

area.

doesn’t

sure

adjust

the

voltage

selector

switch

the

proper

setting

before

operat-

ing

this

equipment.

The

voltage

selector

switch

located

the

rear

panel.

CAUTION:

Before

selecting

the

“Voltage

selector

switch”

proper

voltage

disconnect

the

power

plug.

shock.

not

use

line

isolation

transformer

during

this

check.

Plug

the

line

cord

directly

into

the

outlet.

Us-

ing

“Leakage

Current

Tester’,

measure

the

leakage

current

from

each

exposed

metal

part

the

cabinet,

particularly

any

exposed

metal

part

having

return

path

the

chassis,

known

good

earth

ground.

Any

leakage

current

must

not

exceed

0.5

(r.m.s.).

Alternate

check

method.

Plug

the

line

cord

directly

into

the

outlet.

Use

voltmeter

having

1,000

ohms

per

volt

sensitivity

the

following

manner.

Connect

15002

10W

resistor

paralleled

0.15

AC-

type

capacitor

between

exposed

metal

part

and

known

good

earth

ground.

Measure

the

voltage

across

the

resistor

with

the

voltmeter.

Move

the

resistor

connection

each

exposed

metal

part,

particularly

any

exposed

metal

part

having

re-

turn

path

the

chassis,

and

measure

the

voltage

across

the

resistor.

Now,

reverse

the

plug

the

outlet

and

repeat

each

measurement.

Any

voltage

measured

must

not

exceed

0.75V

(r.m.s.).

This

corresponds

0.5

(r.m.s.).

VOLTMETER

(HAVING

1000.2/V,

SENSITIVITY)

PLACE

THIS

PROBE

EACH

EXPOSED

METAL

PART

15002

10W

GOODEARTH

GROUND

Fig.

When

remeving

stretching

wires

the

Board,

sure

restore

them

their

original

routing

far

possible.

Specifications

watts

per

channel,

min.

RMS,

both

channels

driven

into

ohms

from

kHz,

with

than

0.9%

total

harmonic

distor-

tion.

(U.S.A.

and

Canada

only)

watts

per

channel,

min.

RMS,

both

channels

driven,

into

ohms

kHz

with

than

0.9%

total

harmon-

distortion.

(U.S.A.

and

Canada

only)

watts

per

channel,

min.

RMS,

both

channels

driven,

into

ohms

kHz

with

than

0.9%

total

harmon-

Output

Power

distortion.

Total

Harmonic

0.08%

watts

output,

Distortion

kHz,

8ohms

1O0Hz—

kHz

(‘66

IHF,

both

channels

driven,

ohms,

0.7%

Power

Band

Width

THD)

Frequency

Response

10Hz-50

kHz

dB,-3

ohms)

Tone

Controls

BASS

100

TREBLE

10kHz

Differences

Between

Models

Intended

For

Different

Areas

voltage

selector

Not

fitted

U.S.A.

Canada

Continental

Europe

U.K.

Australia

220V

240V

selec

table,

50/60

100

watts,

130

Fitted

line

fuse

holder

Not

fitted

A-GX1/A-GX1B

Input

Sensitivity/

Impedance

PHONO

2.5

mV/47

kohms

TUNER,

CD/VIDEO

SOUND,

TAPE

150

mV/40

kohms

Phono

Equalizer

Deviation

+1.0

(40

Hz—

kHz)

Signa!

Noise

Ratio

PHONO

(66

IHF)

TUNER,

CD/VIDEO

SOUND,

TAPE

~—

96dB

(‘66

IHF)

PHONO

('78

IHF,

Rec

Out)

TUNER,

CD/VIDEO

SOUND,

TAPE

72 dB

(‘78

IHF,

Speaker

Out)

100

at10

kHz

Loudness

Control

(Volume

Control

-30

position)

Dimensions

and

Weight

(kg/lbs)

435

218

3.3

Design

and

specifications

subject

change

without

no-

tice.

110/120/220

Not

fitted

(No.

2810)

1-2

4-GX1/A-GX1B

Removal

and

Reassembly

Procedures

2-(1)

Removal

the

Main

P.C.

Board

Remove

the

metal

cover.

Remove

screws

(1)

and

the

P.C.

board

Remove

the

jack

the

rear

panel

and

fixing

screws

()

the

speaker

terminal.

Remove

screws

and

plastic

rivet

set

the

front

panel

free.

Remove

all

the

screws

except

the

foot

the

bottom.

Note:

three

types

fixing

screw

are

used

for

the

base,

make

sure

the

screws

are

correct

when

reinstalling.

1-3

(No.

2810)

Slightly

pull

the

front

panel

forward

raise

the

P.C.

board

shown

the

figure.

Note:

This

portion

iocked

the

chassis

base.

PHONO

CD/VIDEO

SOUND

R357

TUNER

$304

TAPE

PLAY

TAPE

REC

MAIN

AMP

SPEAKER

TONE

CONTROL

BALANCE

VOLUME

A-GX1/A-GX1B

Care

should

taken

not

deform

the

part

the

heat

sink

indicated

when

pulling

out

the

P.C.

board.

Oth-

erwise,

may

result

reduc-

ing

the

efficiency

heat

dis-

Sipcition.

LOUDNESS

(No.2810)

1-4

\-GX1/A-GX1B

Wiring

Diagram

Fuse

Holder

Outlets

PC.Board

Assy

Secondary

P.C.Board

Ass’y

aoe

059-

Power

Transtomer

Voltage

Selector

Power

Transfomer

ENH-O59~-7

Outlets

PC.Board

Ass'y

For

West

Germany

Europe

<a-——-

For

Other

ENH-0O59-6

Power

Switch

P.C.Board

Ass’y

For

Australia

——

BLK

“WHT

For

Canada

For

U.S.A

For

U.K.

For

U.K,

Australia,

Europe,

West

Ger

U.SA.,

Canada

ENH-059-5

Power

Transfomer

P.C.Boord

Ass'y

eee

1-5

(No.

2810)

A-GX1/A-GX1B

(U)

FOR

OTHER

COUNTORIES

(P)(PG)

FOR

MILITARY

(BS)

FOR

(A)

FOR

AUSTRALIA

(E)

FOR

EUROPE

(G)FOR

GERMANY

(C)

FOR

CANADA

Gace

SELECTOR

TOO!

SOO}

Tk6A

HOwsizov

‘“

TRANS

T8OOMA

220V/240V

CONECTION

SWITCHED

UNSWITCHED

110V

jacouTLeTS)

SED

ACI2Z0V

AC220V

BLK

BLK/

WHT

I1OV/120V/

220V/240V~

50Hz/60Hz

AC240V

TA7T3I7P

_USED

€303,304

oop

iooPp

470P

UNF.

C717,718

0022

CD/VIDEO

SOUND

YO!

IBK

pe04

182473)

L2.2]

RIGHT

SPEAKERS]

H-0590-2|

ENH-O59-2

POWER

D951

See

aereun

Maw

esi

015

R513

Sain

47K

eatery

gel)

eae

0-9-0

-W

O79

qo—O-O

C503

820

Fce)5

OLS.

O70

Eases

R505

0.082

Ole

LIS!

ERI720

ral

eamoee

aie

loll)

eae

(J)

Bee

rey

eae

pee

[ENH-059-5}

fey

_[ENH-059=1]

Notes:

and

those

marked

with

sure

use

the

designat-

—————

indicates

positive

power

supply.

parts

ensure

safety.

indicates

negative

power

supply.

This

the

standard

circuit

diagram.

indicates

signal

path.

The

design

and

contents

are

subject

change

without

;

notice.

When

replacing

the

parts

the

darkned

area

(

(No.

2810)

A-GX1/A-GX1B

FWIos

FWIO8

ENH-O59-2

Head

Phones

PC.Board

Ass'y

FWIOB

NH-

060

FWio3

FWi0S(7

pin)

FWIO2

ENH-059-|

Power

Supply

Main

Amp

P.C.Board

Ass'y

@peeseeeeO

Countries

Equaslizer

Amp

P.CcBoard

Ass'y

aha

lotale

FWIO5S(7pin)

ENH-O59-3

Tone

Control

P.C.Booard

ENH-059-2

Volume

Blance

P.C.Board

Ass'y

\-GX1/A-GX1B

VICTOR

COMPANY

JAPAN,

LIMITED

STEREO

DIVISION.

YAMATO

PLANT,

1644,

SHIMOTSURUMA,

YAMATO-SHI,

KANAGAWA-KEN,

242,

JAPAN

(No.

2810)

Japan

-G

A-GX1/A-GX1

PARTS

LIST

Contents

Wait

Parts

LOGATIONS

s.x.ccsscaceedcckcariniritne

ial

bariea

2-2

need

Soave

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docs

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ten

penuaastedeiearnseet

tes

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carats

Sessa

inetesiat

dee

vaca

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tit

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ctodhuAcacecdavinaeaeeeee

seaman

2-2

Exploded

View

and

Part

NUMBERS

.............-.c:ccccsccccssssscessesseneconsssonsonersecesnesncusaensascosropevssed

peers

2-3

Printed

Circuit

Board

Ass’y

and

Parts

List.................ccccccesseccseseosceeueecsseccsseeceeeceneeseaeeseaeeeoaees

2-6

3-(1)

ENH-059

Main

Amp

P.C.

Board

ASS’Y

.............cccecceeseeeeeneeeeeeceeeeeenaaeeereeenenaaueeeeeesatanes

2-6

3-(2)

ENH-O60

Equalizer

Module

P.C.

Board

ASS’y

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

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cee

enreeeeeteeceeseeneaeerrentaens

2-10

3-(3)

TPS-334

Outlet

P.C.

Board

ASS'Y........c:.c.cccesccceeseseronesacssssnssnsccenscaceescetecusevecseanseeeens

2-10

Packing

Materials

and

Part

NUMDEIS

sicicksnscans

ria

caterscatenastvaincaab

soem

een

dis

dinieniag

ean

teellntereaseiess

2-11

PRCCOSSOTIES

L156

Cress

oes

csi

tian

aches

raat

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ewecBece

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scuaaGa

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ance

edee

eee

2-12

(No.

38810)

2-1

Ce manuel convient aux modèles suivants

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