Sansui 2000X Manuel utilisateur

(aE

RUSTE

SERVICE

MANUAL

SOLID-STATE

AM/FM

STEREO

TUNER

AMPLIFIER

SANSUI

ELECTRIC

COMPANY

LIMITED

CONTENTS

GENERAL

TROUBLESHOOTING

CHART........006::::05

3,4

CUSTOM

MOUNTING:

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5,6

DISASSEMBLY

PROCEDURE

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PRINTED

CIRCUIT

BOARDS

AND

PARTS

LIST

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aes

15,

16,

17, 18,

19, 20,

21,

22,

23,

24,

25,

26, 27,

OTHER

PARTS

AND

THEIR

POSITION

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Settee

GENERAL

TROUBLESHOOTING

CHART

the

amplifier

otherwise

operating

satisfactorily,

the

common

causes

trouble

may

generally

at-

tributed

the

following:

Incorrect

connections

loose

terminal

contacts.

Check

the

speakers,

record

player,

tape

recorder,

antenna

and

line

cord.

Improper

operation.

Before

operating

any

audio

com-

ponent,

sure

read

the

manufacturer’s

instructions.

Improper

location

audio

components.

The

proper

positioning

components,

such

speakers

and

turn-

table,

vital

stereo.

Defective

audio

components.

The

following

are

some

other

common

causes

mal-

function

and

what

about

them:

PROGRAM

SYMPTOM

PROBABLE

CAUSE

WHAT

AM,FM

MPX|

Constant

intermit-

Discharge

oscillation

Attach

noise

limiter

the

electri-

reception

tent

noise

heard

caused

electrical

appli-

cal

appliance

causing

the

noise,

times

certain

ances,

such.

fluorescent

attach

the

amplifier’s

power

area

lamp,

set,

D.C.

motor,

source

rectifier

oscillator

Install

outdoor

antenna

and

)

Natural

phenomena,

such

ground

the

amplifier

raise

the

atmospherics,

statics

signal-to-noise

ratio.

thunderbolts

Reverse

the

power

cord

plug-

Insufficient

antenna

input

receptacle

connections

due

ferroconcrete

wall!

the

noise

occurs

certain

done

distance

from

the

frequency,

attach

wave

trap

the

ANT.

input

Me)

Keep

the

set

proper

distance

from

other

electrical

appliances

The

needle

the}

Receiver

located

Place

the

set

receive

maximum

tuning

meter

does

not

weak

signal

area

signal

strength

move

sharply

The

zero

point

the

Regional

difference

field

The

unit

not

fault

meter

diverges

much

intensity.

reception

Noise

heard

Due

the

nature

AM]

Install

the

antenna

for

maximum

particular

time

broadcasts

antenna

efficiency.

See

‘“ANTEN-

day,

certain

area

NA”’

the

operating

instructions

over

part

dial

some

cases,

the

noise

can

eliminated

grounding

the

ampli-

fier

reversing

.the

power

cord

plug-receptacle

connections

High-frequency

noise

Adjacent-channel

interfer-

Although

such

noise

cannot

ence

beat

interference

eliminated

the

amplifier,

-eatctad.

Cloke:

to.

audio

advisable

adjust

the

TREBLE

postenn

control

from

midpoint

left

and

switch

the

HIGH

FILTER

Keep

the

set

proper

distance

from

the

audio

system

reception

Noisy

Poor

noise

limiter

effect

Install

the

antenna

(supplied)

for

too

low

ratio

due

maximum

signal

strength

insuficrenbantentaaput

this

does

not

prove

effective,

use

outdoor

antenna

designed

Note:

reception

affected

considerably

exclusively

for

FM.

When

you

use

transmission

conditions

stations:

power

and

antenna

for

both

and

antenna

efficiency.

Asa

result,

you

may

receive

with

splitter,

make

sure

recep-

one

station

quite

well

while

receiving

another

tion

not

affected

station

poorly

excessively

long

antenna

may

cause

noise

(

eee

PROGRAM

reception

SYMPTOM

series

pops

PROBABLE

CAUSE

Ignition

noise

caused

WHAT

Install

the

antenna

and

its

lead-in

(cont’d)

heard

automobile

engine

wire

proper

distance

from

the

road

raise

the

antenna

input

described

above

Tuning

noise

between

This

results

from

thenature.|

Turn

the

muting

on.

stations

the

reception.

the

station

signal

becomes

weak,

the

noise

limiter

effect

decreased,

and

the

amplifi-

cation

the

limiter,

turn,

enlarged,

generating

noise

FM-MPX

Noise

heard

during

Weaker

signal

because

the

Install

the

antenna

for

maximum

reception

FM-MPX

reception

service

area

the

FM-

antenna

input

while

not

heard

during

mono

reception

MPX

broadcast

only

half

that

the

mono

broad-

cast

Clearness

channel

separation

isdecreased

during

reception

Excess

heat

The

stereo

indicator

blinks

and

off

The

stereo

indicator

blinks

and

off

even

though

stereo

station

not

received

Interference

Switch

the

HIGH

FILTER

and/or

turn

the

TREBLE

control

from

mid-

point,

left

Circulation

air

important

the

amplifier.

sure

that

air

flowing

under

the

amplifier

The

indicator

not

fault.

Adjust

VRaor

The

indicator

not

fault.

Adjust

VRao1

Record

playing

tape

playback

Hum

howling

Record

player

placed

direct-

speaker

Wire

other

than

shielded

wire

used

Loose

terminal

contact

Shielded

wire

too

line

cord,

fluorescent

lamp

other

electrical

appli-

ances

Nearby

amateur

radio

sta-

tion

transmission

antenna

Place

cushion

between

the

player

and

the

speaker

box

place

them

away

from

each

other

The

connecting

shielded

wire

should

short

possible

Switch

the

LOW

FILTER

and

turn

the

BASS

control

from

midpoint

left

Consult

the

nearest

Radio

Regulatory

Bureau

Surface

noise

Worn

old

record

Worn

stylus

Stylus

dusty

Improper

stylus

pressure

Worn

playback

head

Switch

the

HIGH

FILTER

and

turn

the

TREBLE

control

from

mid-

point

left

Clean

replace

the

stylus

Replace

the

playback

head.

All

stereo

programs

BALANCE

control

not

midpoint

when

equal

sound

comes

from

left

and

right

channels

important

adjust

for

equal

sound

from

both

channels.

should

not

always

set

the

mid-

point

Set

the

MONO

switch

MONO

and

then

set

the

BALANCE

control

position

where

equal

sound

comes

from

both

channels

CUSTOM

MOUNTING

How

install

the

amplifier

wooden

cabinet

Make

cabinet

cutout

432mm

17”

width

and

117mm

4°°/64”

height.

Place

two

square

pieces

wood

(20

20x

240mm

25150”

8/50”

92°/,,”)

for

supporting

the

amplifier

the

bottom

board

the

cabinet.

Cut

two

holes

for

attachment

bolts

the

bottom

board

the

cabinet.

Remove

the

amplifier

from

the

wood

case

(Refer

the

section

entitled

“DISASSEMBLY

PROCEDURE”).

Place

the

amplifier

position

through

the

cabinet

cutout.

Make

sure

the

amplifier

position,

then

put

the

washers

butterfly

bolts

(4X

40mm)

and

fix

the

amplifier

the

cabinet

with

the

butterfly

bolts,

Note:

When

the

amplifier

built

into

the

custom

cabinet,

the

wood

case

assembly

including

screws

and

washers

not

used.

Retain

for

future

uses

Ueto

ais

AMO

Width

front

panel

board

4,35”

reenraraet

beigebig

head

latelned

Spe

ite

A387

Front

width

cabinet

window

oo =a

Cees

POPOV

VOOPL

PET

ATL

External

dimension

panel

ees

LOIS

SiON

External

dimension

cabinet

can

alt

oko

wko

peers

Sears

ef.

‘D

pei

pag

aes

ite,

iol

tad

320%,

1233”

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20%,"

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rs,

K-7

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€

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aaa

(cd

Amplifier

fixing

buterfly

bolts

Lees,

eee

Les

okt

Washers

10d

m4,

2”

—

13)”

2407

350%

“

—

DISASSEMBLY

PROCEDURE

——.

REMOVING

THE

WOOD

CASE

bad

e=-0@——\_/

REMOVING

THE

FRONT

PANEL

AND

BOTTOM

PLATE

DIAL

MECHANISM

BLOCK

DIAGRAM

PACK

(NO100}

FETio1

TRiez

)

Lio

iol

ANTENNA

3002

75.2000

AMP

HIGH

FREQUENCY

107

MHz

_INTER

(F-1214-1)

(No.200)

T204

10.7MHZ

T203

10.7MHZ

oad

Teo2

1C204

$+—+-2C

OUT

DISCRIMI

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ANTENNA

{

455kHz

455KH2

HIGH

FREQUENCY

AMP

MIXER

AMP

AMPS

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peated

TR302

TR304

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T303

T7304

T305

T302

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COMPOSITE

19kHz

{SIGNAL

AMP

AAG

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TUNING

DEEMPHASIS

~-MPX

NOISE

CANCELER

38kH2

FILTER

(F-1224)

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}

MYVTIRPLER

STEREO

(F-1190)

(NO,400)

NOISE

AMP

ERASER

avis

Daoe

STEREO

TR405

TRa06

TRao

INDICATOR

PLois

STEREO

INDICATOR

Sees

meas

TAPE

MON.

TONE

CONTROL

Mire

;

LOW

FREQUENCY

AMP

Hon)

‘

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TReo3

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TR6O1

TREO2

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AMP

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Susi

(F+1180)

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PHONOTO

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TR704

TR705

TONE

CONTROL

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BLOCK

are

won,

b-—

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{LOW

FREQUENCY

AMP

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PRE

AMP

peeeepazen

Aaa

BLOCK

Tilt

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ORIVER

AMP

100V

Door

‘itce

110V

Vi7V

POWER

Bayi

CIRCUIT

Dooz

TRoo:

(NO.000

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230V

RECTIFIER

ell

240V

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CIRCUIT

tRIPPLEZ20o

Z2Dooz

eOOY

KE-MI9Z)(no.

000)

FILTER

CIRCUIT

50~60Hz

((F-11954)(no.000)

TEST

POINTS

L105

Lio2

Loi

L103

Lio4

TP201

TP202

TP204

TP203

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