JVC JA-S310 Bedienungsanleitung

MODEL

JA-S3S10

STEREO

AMPLIFIER

No.

2355

MARCH

1975

Features

All-stage

Direct-coupled

Pure

Complementary

OCL

Circuit

gives

undistorted

amplification

with

sufficient

negative

feedback

from

direct

current

over

100kHz.

Regulated

plus-minus

dual

power

supply

system

and

differential

equalizer

with

class

operation

get

wide

dynamic

range

and

low

distortion.

Direct

phono

terminal-to-equalizer

circuit

connection

avoiding

shielded

wiring

the

high

impedance

Phono

input

circuit

improves

high

frequency

sound

quality

giving

clear

and

transparent

highs.

Specifications

DIMENSIONS

Impact

Noise

Killer

eliminate

impact

noise

which

may

damage

the

speakers

when

the

power

switch

turns

and

off.

High

Cut

Filter

eliminate

tape

hiss

and

record

scratch

noise.

Recording

Play-back

through

Microphone

Mixing

Circuit.

High:

4-3/4

(12.1em)

Width:

15-3/4(40.0cm)

Depth:

11-3/8

(28.9cm)

WEIGHT

Net:

14.5

Ibs.

(6.6

kg)

Gross:

16.5

Ibs.

(7.5

kg)

Transistor

Diode

Input

Terminal

PHONO,

TUNER,

AUX,

TAPE

PLAY,

MIC

SPEAKER

SYSTEM

HEADPHONE

JACK

TAPE

REC

TAPE

Output

Terminal

DIN

Terminal

Output

Power

Music

Power

(IHF)

100W

(50W

50W)

80W

(40W

40W)

TOW

(35W

35W)

64W

(32W

32W)

Continuous

Power

(one

channel

driven}

1kHz0.8%

Continuous

Power

(both

channel

driven)

1kHz0.8%

Power

Band

Width

Total

Hamonic

Distortion

(output

power

22W)

Intermodulation

Distortion

5OW

(25W

25W)

50W

(25W

25W)

10Hz~40kHz

IHF.

0.06%

1kHz

Max.

0.8%

rated

output

power

Max.

0.1%

(1W)

Damping

Factor

Load

Impedance

Frequency

Response

Tone

Control

Bass

Treble

Input

Sensitivity

(input

impedance)

Signal

Noise

Ratio

Phono

Over

Load

Level

Recording

Output

Level

Filter

Loudness

Control

Volume

—30dB

Position

from

Max.

Phono

Min.

(82,

1kHz)

162.

20Hz~

30kHz

+0.5dB

100Hz

+10dB

10kHz

+10dB

Phono

2.5mV

(47k2)

Mic

5mV

(10k)

Tuner,

Aux

165mV

(50ka

)

Tape

Play

165mvV

(50k)

63dB

(RMS)

Aux

80dB

(RMS)

380mV

(P-P)

135mV

(RMS,

1kHz)

Tape

Rec.

160mV

DIN

30mV

High

9kHz,

-6dB/oct,

50Hz

+11.5dB

1kHz

+1.5dB

10kHz

+4.5dB

POWE

SUPPLY

POWE

CONSUMPTION

JA-S310

No.

2355

“U"

Type

—

100,120,200,240V

(Selectable)

50/60Hz

“E"

Type

—

220V 50Hz

“A"

Type

—

240V

50Hz

66W

;

Bgl

Caution

JA-S310

models

intended

different

areas.

There

are

four

models

that

have

specific

voltages

different

areas;

these

are:

[te

Line

Voltage

220V

50Hz

only

220V

50Hz

only

240V

50Hz

only

100/120/220/240V,

selectable,

50/60Hz

England,

Australia

This

amplifier

has

been

pre-set

the

line

voltage

the

area

where

it is

sold.

See

page

fuse

replacement

and

voltage

selection.

Use

this

amplifier

within

10%

the

stated

power.

careful

provide

good

ventilation

while

using

it,

continuously,

with

high

output

power.

Turn

off

the

power.before

connecting

any

components

the

click

noise

could

damage

the

speakers.

Connect

the

speaker

and

input

terminals,

correctly.

Wrong

polarity

shorting

will

result

unstable

sound

because

the

phase

inversion

cause

the

protective

fuse

blown.

poor

ground

connection

the

plug,

the

input

jack,

may

result

hum

that

the

saturated

output

will

damage

the

speaker.

Main

Parts

Arrangement

BASS

TREBLE

MODE

SELECT

PHONES

MIC

QMS6301-001

QMS6313-001

QSU1120-006

QSL2235-101

E03075-28B

E33912-001

E21666-004

”

Jack

Ass’y

”

Lever

Switch

”

Power

Trans

Heat

Sink

Front

Panel

SPEAKER

BALANCE

HI-FILTER

10.

E49643-006

Knob

VOLUME

E49642-003

Push

Knob

LOUDNESS

TAPE

MONITOR

E49645-003

Knob

MIC

MIXING

POWER

“U"

Type

”

CEU

MAU

Type

not

operate

the

switches

and

controls

about

seconds

after

the

power

switched

on,

for

this

may

produce

unusual

impact

noise.

Wait

until

after

the

set

becomes

stable.

This

impact

noise

not

the

fault

the

machine.

When

one

pair

speaker

terminals,

SYSTEM-1

SYSTEM-2,

are

used,

speakers

with

impedance

ohms

can

used.

When

you

use

the

position

the

speaker

selector,

the

speakers

must

have

impedance

ohms

higher.

the

overall

impedance

less

than

ohms,

the

set

overstrained.

the

instructions

given

the

rear

panel.

The

components

connected

the

outlets,

should

less

than

300W

total.

outlets

are

provided

only

the

‘’U”

type

sets.

The

TAPE

terminals

and

DIN

socket

are

connected

parallel,

they

cannot

used

the

same

time.

Use

one

the

other,

but

not

both.

you

are

using

microphone

with

components

connected

the

TUNER,

AUX

TAPE

PLAY

terminals,

turn

down

the

MIC

MIXING

control

before

operating

the

SELECT

TAPE

MON

controls.

you

fail

this,

the

sudden

rise

mike

sound

will

cause

damage

the

speaker.

Fig.

JA-S310

No.

2355

Parts

No.

Parts

Name

TAE-108

EQ.

C.B.

Ass’y

TXX-7

Main

Tone

C.B.

“U"

"A"

Type

TXX-7B

”

“E”

Type

E21665-002

Rear

Panel

E03621-001

Jack

Ass’y

OMC0589-001

DIN

Socket

Ass’y

E47268-001

Knob

Screw

E03572-101

Terminal

Ass’y

System

”"

”

System

E49877-001

Label

E48992-001

Speaker

Label

E47330-161

Rating

Label

“U"

Type

only

E47330-162

”

““E’

Type

only

E47330-163

“A"

Type

only

Fig.

Disassembly

Instructions

REMOVE

TOP

COVER

REMOVE

BOTTOM

BOARD

Remove

four

screws

from

both

sides

top

cover,

and

Remove

six

screws

from

bottom

board.

remove

cover

the

direction

top

(see

Fig.

3).

Remove

bottom

board

from

chassis

(see

Fig.

4).

Fig.

JA-S310

No.

2355

—-4-—

Ati,

REMOVE

FRONT

PANEL

Remove

top

cover.

Remove

following

knobs.

(Speaker

select,

Bass,

Treble,

Balance,

Volume,

Select

and

Mic

Mixing)

Remove

two

screws

shown

Fig.

and

remove

front

panel

from

chassis,

with

care

avoid

damage.

Fig.

How

Replace

Main

Parts

)

Use

the

provided

illustration

remove

the

front

panel,

shown

Fig.

Remove

the

bottom

plate,

too.

bottom

plate

and

top

cover.

Then

the

lever

switch,

replace

the

power

transformer,

loosen

the

screws

headphone

jack,

speaker

switch,

balance

control

and

install

new

one

shown

Fig.

microphone

circuit

board

assembly,

can

simply

The

’’U”

type:

replaced

shown

Fig.

replace

the

selectable

voltage

socket,

first

remove

the

remove

TAE-108

and

TAP-245A

("E”

type:

bottom

plate

and

loosen

the

screws

shown

Fig.

TAP-245B),

loosen

the

screws

and

nuts

(D)

TXX-7

TAP-245A

TAC-349

TXX-7B

TAP-245B

TAC-349

POWER

LEVER

SWITCH

REAR

PANEL

yal

ae,

Sof

VOLTAGE

SELECT

BOF

SOCKET

TYPE

ONLY)

@°

STAGE

SELECT

g°

PLUG

TYPE

ONLY)

MIC

CIRCUIT

BOARD

(TAC-349)

FRONT

BRACKET

Fig.

JA-S310

aJeus:

No.

2355

How

Replace

Main

Parts

(II)

JA-S310

No.

2355

Fig.

First

remove

the

top

cover

and

bottom

plate

shown

replace

the

DIN

socket

and

speaker

terminals,

remove

the

screws

and

the

plastic

rivets

shown

Fig.

DIN

SOCKET

REAR

PANEL

SPEAKER

TERMINAL

replace

the

socket

assembly,

cord

stopper

and

power

Fig.

LASTIC

River

PUSH

Fig.

w-————CORD

STOPPER

cord,

loosen

the

screws

and

remove

the

transformer

bracket.

Then,

loosen

the

screws

replace

the

rear

panel,

remove

the

screws

A,D,E

phtyhy

plastic

rivets

and

the

parts

thereto.

Then,

loosen

the

screws

and

The

plastic

rivets

can

removed

illustrated

Fig.

REAR

PANEL

TRANS

BRACKET

Aten,

woo

Alignment

(our

}

(]

R735

ols

[DECREASE

]

[INCREASE

LINCREASE

]

[DECREASE

]

NGUBRERY/

CURRENT?

R719

R720

Fig.

Adjustment

the

center

voltage

the

power

amplifier

Adjustment

the

idling

current

the

power

amplifier

(see

Fig.

9).

(see

Fig.

9).

Adjustment

sequence

and

method:

Adjustment

sequence

and

method:

Adjust

R707

and

R708

medium

before

switching

Turn

R719

and

R720

fully,

the

direction

the

power

on.

DECREASE.

Connect

the

negative

lead

high

sensitivity

Connect

the

same

high

sensitivity

voltmeter,

used

voltmeter

(which

can

show

correct

values

below

the

adjustment

the

center

voltage,

(L)

OUT

and

10mV)

and

its

positive

lead

(L)

OUT

(of

the

(A).

(When

adjusting

for

the

right

channel,

left

channel)

(R)

OUT

(of

the

right

channel)

and

connect

(R)

OUT

and

(B)).

switch

the

power

on.

Gently

turn

R707

R708

Two

minutes

after

the

power

switched

on,

little

until

the

voltmeter

indicates

OV.

turn

R719

(R720

for

right

channel)

very

slowly

Notes:

the

direction

INCREASE

until

the

voltmeter

Leave

about

minutes

and

check

again.

shows

value

10mA

(approx.

20mA

for

right

the

needle

moves

from

alignment,

repeat

the

same

channel).

;

procedural

adjustment.

After

completion

the

adjustment

both

channels,

the

voltage

deviates

than

100mV,

check,

again,

the

channel

which

was

first

adjusted.

adversely

affects

the

distortion.

Much

care

possible

the

reading

out

alignment,

repeat

the

should

used

this

adjustment.

(Two

three

times

repeated

The

voltmeter

can,

also,

connected

the

speaker

adjustments

will

give

correct

and

reliable

result.)

terminals.

The

voltmeter

may

deflect

either

direction.

careful,

especially,

the

deflection

toward

the

minus

(-}

side.

Standard

Gain

PHONO

+13.2dB

-13.848

1kHz:

OdB

MIC

72+2dB

70+1.5dB

67+2dB

MIC

MIXING:

MAX

VOLUME:

MAX

SELECT

SW:

PHONO

Speaker

Terminal:

892

Resistor

JA-S310

No.

2355

Voltage

Changeover

Remove

the

six

screws

from

the

Bottom

Board.

(see

Fig.

10)

LINE

VOLT

appr

ape

200

—

240V

QMF60R1-1R2}

OMF51A2-1R25

OMFGOR1-1R2

Fig.

Remove

the

Bottom

Board

from

the

chassis.

The

voltage

select

plug

located

the

conner

the

chassis.

Remove

this

select

plug

and

change

the

position

that

the

arrow

points

the

required

voltage.

(see

Fig.

11)

Replace

the

safety

fuse

well

with

one

appropriate

capacity.

LINE

VOLTAGE

100

—

120V

200

—

240V

Fig.

JA-S310

No.

2355

_~g_

Exploded

View

JA-S310

No.

2355

List

Main

Parts

JA-S310

No.

2355

E21666-004

E46673-003

E49640-003

E49643-006

E49645-003

SBSB3008M

E21671-001

E43603-004

52868-3

SBSB3008Z

QLP3104-101

QSU

1120-006

QSL2235-101

QMS6301-001

OSROO60-001

QVF1A2W-615

TXX-7

TXX-7B

E45979-012

E50670-003

E49642-003

TXX-7

TXX-7B

TAE-108

E33910-002

Front

Panel

Rabbit

Eye

Escutcheon

Knob

Screw

Front

Bracket

Bushing

Terminal

Screw

Lamp

Ass’y

Power

Switch

Lever

Switch

Jack

Ass‘y

Rotary

Switch

Resistor

Circuit

Board

Ass’y

(Mic.

Amp)

Spacer

Wire

Clamp

Push

Knob

Circuit

Board

Ass’y

(Main

Amp)

Circuit

Ass’y

Support

Bracket

—10—-—

VOLUME

BASS,

TREBLE,SPEAKERS,BALANCE,

SELECT,MIC

MIXING

(

“U"

Type

“E’

Type,

“A”

Type

Headphone

SPEAKERS

BALANCE

“U"

Type,

“A”

Type

(TAC-349)

“E”

Type

(TAC-349)

POWER

HI-FILTER,

MODE,

LOUDNESS,

TAPE

MONITOR

(

“U"

Type,

“A”

Type

(TAP-245A)

“E"

Type

(TAP-245B)

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