Sony CFS-B31 Manual de usuario

Frequency

range

CFS-B31:

European

model

FM:

87.6-107

MHz

AM:

531-1,611

kHz

Italian

model

FM:

87.5-108

MHz

AM:

531-1,611

kHz

CFS-B31L:

European

model:

FM:

87.6-107

MHz

LW:

153-279

kHz

CFS-B31L:

East

European

model:

FM:

65-74

MHz

87,5-108

MHz

LW:

153-279

kHz

FM:

10.7

MHz

AM/LW:

450

kHz

Aerials

FM:

Telescopic

aerial

European,

UK,

Italian

model:

AM/LW:

Built-in

ferrite

bar

aerial

East

European

model:

LW:

Built-in

ferrite

bar

aerial

Recording

system

“track,

channel

stereo

Frequency

response

50-12,500

Photo

CFS-B31

JIL

AEP

Model

CFS-B31/B31L

Model

CFS-B31

SPECIFICATIONS

Speakers

Full

range:

inches)

dia.

cone

type

Maximum

power

output

2.5W+2.5W

Output

Headphones

jack,

16-68

ohms

inpedance

Power

requirements

For

radio

cassette-corder:

European,

East

European

model:

220-230

AC,

United

Kingdom

model

230-240

AC,

DC,

six

R20

(size

batteries

For

radio

memory:

DC,

two

(size

AA)

batteries

Power

consumption

operation

Battery

life

For

radio

cassette-corder:

Batteries

recording

Playback

Sony

approx.

SUM-1(NS)

hours

Sony

AM1

approx.

alkaline

hours

Model

Name

Using

Similar

Mechanism

CFS-B11

Tape

Transport

Mechanism

Type

MF-200

For

radio

memory:

approx.

one

year

Dimensions

Approx.

440

136.5

150.5

(w/h/d)

(17

inches)

including

projecting

parts

Mass

Approx.

2.8

02)

including

batteries

Accessory

supplied

Mains

lead

(1)

Optional

accessories

Sony

“MDR”

headphones

series

Design

and

specifications

are

subject

change

without

notice.

RADIO

CASSETTE-CORDER

SONTY.

TABLE

CONTENTS

Section

Title

Page

SECTION.

GENERAL

e::oscSsicasivaeriscttig

aural

dimen

SECTION

DISASSEMBLY

Zale

sFROMECaDINGt

casGietiach

omsetinsate

nina

rae

Ameins

SECTION

MECHANICAL

ADJUSTMENTS...............5

SECTION

ELECTRICAL

ADJUSTMENTS

............00.

SECTION

DIAGRAMS

5-1.

Function

10901

WPD1724G

LCD

Drive/Control

...........c:ccceseeeeeees

5-23.

-BlOCK

DIAQIAMM

wiessdsccccssvevccvetavabaaaea

tedasasvestenssdeadiae

daaveete

5-3.

Printed

Wiring

Board

—

Tuner/LCD

Section

—...........0.

5-4.

Schematic

Diagram

—Tuner/LCD

Section

—........

5-5.

Printed

Wiring

Board

—

Audio/Power

Section

—.............

5-6.

Schematic

Diagram

—

Audio/Power

Section

—.............

SECTION

EXPLODED

VIEWS

6-1.

Front

Cabinet

Section

0.0...

ceeesteceesneceeseteeteeeeieeenes

6-2.

Rear

Cabinet

Section

........

ccc

cccscssessessecenseceneecereeseeeaes

6-3.

Mechanism

Deck

Section

(MF-200)

........ccesceeseceeenreees

6-4.

Mechanism

Deck

Section

(MF-200)

.........cccccceeeeeee

SECTION

ELECTRICAL

PARTS

LIST.............:ccceee

SAFETY-RELATED

COMPONENT

WARNING

COMPONENTS

IDENTIFIED

MARK

DOTTED

LINE

WITH

MARK

THE

SCHEMATIC

DIAGRAMS

AND

THE

PARTS

LIST

ARE

CRITICAL

SAFE

OPERATION.

REPLACE

THESE

COMPONENTS

WITH

SONY

PARTS

WHOSE

PART

NUMBERS

APPEAR

SHOWN

THIS

MANUAL

SUPPLEMENTS

PUBLISHED

SONY.

HOW

CHANGED

THE

CERAMIC

FILTERS

This

model

used two

ceramic

filters

CF1

and

CF2.

You

must

used

same

type

color

marked

ceramic

filters

order

meet

same

specifications.

Therefore,

the

ceramic

filter

must

changed

two

pieces

together

since

it's

supply

two

pieces

one

package

spare

parts.

FUNCTION

NAME

LOCATION

CONTROL

O©®@

PHONES

jack

(2)

VOLUME

knob

TONE

knob

MIC

OPR/BATT

indicator

lights.

FUNCTION

switch

MODE/ISS

button

(rear

side)

PAUSE

button

()

m/&

STOP/EJECT

button

REW

button

()

»p»

button

(2)

PLAY

button

REC

button

ENTER

button

(5)

TUNING

—

button

TUNING

button

PRESET

—

button

PRESET

button

SECTION

GENERAL

O®@

SECTION

DISASSEMBLY

Note

the

disassembly

procedure

the

numerical

order

given.

2-1.

FRONT

CABINET

Three

screws

(PTP3x30)

Push

the

EJECT

button

Connector

(CNP4)

Three

screws

(PTP3x30)

Connector

(CN2)

Connector

(CN1)

Front

cabinet

SECTION

MECHANICAL

ADJUSTMENTS

PRECAUTION

Clean

the

following

parts

with

denatured-alcohol-

moistened

swab

record/playback

head

pinch

roller

erase

head

rubber

belts

capstan

idlers

Demagnetize

the

record/playback

head

with

head

demagnetizer.

(Do

not

bring

the

head

demagnetizer

the

erase

head.)

not

use

magnetized

screwdriver

for

the

adjustments.

After

the

adjustments,

apply

suitable

locking

compound

the

parts

adjusted.

;

The

adjustments

should

performed

with

the

rated

power

supply

voltage

unless

otherwise

noted.

Torque

Measurement

Mode

Torque

Meter Meter

Reading

—

g*cm

Playback

COA

(0.42

—

0.97

inch)

Pee

;

C0-102C

1.5—5.5

g*cm

aceSIOu

(0.021

—

0.076

inch)

—

130

-201B

Tape

Tension

Measurement

Mode

Tension

Meter Meter

Reading

CQ-403A

than

100g

(3.53

oz)

SECTION

ELECTRICAL

ADJUSTMENTS

TAPE

SECTION

The

adjustments

should

performed

the

order

given

the

service

manual.

(As

general

rule.

playback

circuit

adjustment

should

completed

before

performing

recording

circuit

adjustment.)

The

adjustments

should

performed

for

both

L-CH

and

R-

unless

otherwise

indicated.

Switch

location

FUNCTION

sjiscaiveissciteneare

TAPE

VOLUME

iccsusseressvsainitoatonne

MAX

TON

vesiteeiccretaneseatssatetnentvans

HIGH

Standard

Output

Level

OUT

Output

level

0.775V

dB)

Test

Tape

Type

Sonat

Useditor

WS-48B

kHz,

Tape

Speed

Adjustment

P-4-A063

6.3

kHz,

-10

Head

azimuth

adjustment

=0.775

Tape

speed

adjustment

Procedure

Mode

playback

speed

checker

LFM-30

test

tape

digital

frequency

WS-48B

counter

kHz,

dB)

32Q

phones

jack

Adjustment

Values

Speed

checker

Digital

frequency

counter

Frequency

difference

between

the

beginning

and

the

end

the

tape

should

within

1.5%

(45Hz).

Adjustment

Location

tape

speed

adjustment

countrol

inside

motor

Record/Playback

Head

Azimuth

Adjustment

Procedure

Mode

Playback

test

tape

P-4-A063

(6.3

kHz,

-10

dB)

VTVM

jack

Turn

the

adjustment

screw

for

the

maximum

output

level.

these

levels

not

match,

turn

the

adjustment

screw

until

both

output

levels

match

together

within

dB.

L-CH

peak

output

level

ast

Screw

position

Phase

Check

Mode

playback

test

tape

P-4-A063

oscilloscope

(6.3

kHz,

~10

dB)

L-CH

320

phones

jack

RCH

inphase

45°

good

Adjustment

Location

adjustment

screw

REC/PB

head

TUNER

SECTION

Switch

location

TONE

sevcosscctetevorlreskecaeeens

mechanical

center

(LW)

SECTION

BAND

(LW)

signal

generator

Put

the

lead-wire

antenna

the

set.

C——

30%

amplitued

modulation

400

signal.

Output

level

low

possible

SECTION

BAND

signal

generator

0.01pF

telescopic

(oummeema

antenna

terminal

22.5

kHz

frequency

deviation

400

signal.

Output

level

low

possible

VTVM

phones

jack

Repeat

the

procedures

each

adjustment

several

times,

and

the

frequency

coverage

and

tracking

adjustments

should

finally

done

the

trimmer

capacitors.

ADJUSTMENT

Adjust

for

maximum

reading

VM.

Adjust

for

maximum

reading

VTVM.

(

)

CFS-31L

Adjustment

Location

[TUNER

BOARD]

(

Component

Side)

(LW)

FREQUENCY

COVERAGE

ADJUSTMENT

POG

VCO

Adjustment

Procedure

signal

telescopic

generator

antenna

terminal

Carrier

frequency

MHz

Modulation

modulation

Output

level

0.1V

(100

dB)

Connect

the

frequency

counter

and

pins

IC1

shown

the

figure

below.

Turn

the

set

MHz.

Adjust

RV1

for

kHz

500

reading

frequency

counter.

[TUNER

BOARD]

(

Component

Side)

frequency

counter

FREQUENCY

COVERAGE

ADJUSTMENT

ANT2

cTt

}

FREQUENCY

COVERAGE

ADJUSTMENT

TRACKING

ADJUSTMENT

cre

ADJUSTMENT

SECTION

DIAGRAMS

5-1.

PINFUNCTIONS

1C901

yPD1724G

LCD

DRIVE/CONTROL

Pinnon

PinName

[vo

[SSCS

[iscson

[eer

ria=

[oom

cos

LedConmonsntoupe

—SC“‘“*S*S*~*~*S*S*~S~*

SE)

rauazer

fei

Charen

oupe—SSCSCSC~C~“‘“S*Ss*“‘“SCSCSCSCSCSCS~*SY

[ce

SS™~dC

ieee

SSC=“‘“S*S*S*SC“‘“S*SCSSCSCSCSCSCSCSCSCS*d

X’tal

clock

(75

kHz)

eres

32.

VREG

Connect

capacitor

(for

X’tal

voltage

drive)

PAS

hel

Connect

capacitor

(for

LCD

voltage

drive)

PAI

rae

PAO

ade

—

Manag

PC3

FM/AM

(LW)

band

switch

“H”=AM

(LW)

“L”=FM

pee

__|—}

[si=ss

[ucps-vopis

Abbreviation

IT:

Italian

model

East

European

model

CFS-B31/B31L

5-2.

BLOCK

DIAGRAM

DISCRI

’

FM/AM

FRONT-END

FM/AM

IF,

MPX

PRE

AMP

POWER

AMP

Ic1

U/2

IC1

(2/2)

1301

RV301

RV302

10302

TONE

VOLUME

TELESCOPIC

MIC3O1

ANTENNA

SacNES

[

FRONT-END

]

(6)

Ets

FILTER

-E=D+(13)

(6)

(9)

FROMT-END

MUT

ING

SP201,

202

FERRITE

FROMT-EN0

FILTER

pha

ANTENNA

yy)

1O3

[

Reh

G4)

TUNING

INDICATOR

MUT

ING

Wee

OSC

SELECT

302-1

FUNCTION

6) 69

TAPE/

*R-CH

omitted.

RABIO

OFF<-AM<-FM

——

Signal

path,

“FM

—_

BUFFER

f¥

7eti

[¥]

tad

eae

=|z

osc

$+.

RFA

)

SWITCHING SWITCHING

ogee

revra

eee

HEAD

_¥¥Y

_y¥yv

8301-1

$301-2

—*

REC

>>>

‘REC

HESO1

ERASE

HEAD

$302-2

TZ01

FUNCTION

BIAS

OSC

TAPE/

RADIO

OFF<-AM<-FM

praca

BLAS

B90

7801

CNJ801

MODE/ISS

Q301,

302

;

QWER

1882

TRANSFORMER

£\

STBY

+9V

REG

REC

Q303

8801-804

TUNE

3-2

MODE/ISS

STEREO

—»

MONO

$30

BUFFER

LPF

STBY

Q903

Q8.

901

+9V

My.

BACK

_[_

301

$301-4

PRY

BATTER

RADIO

[OPR/BATT]

“

PB->REC

SIZE"AA™

IEC

BESIGNATION

3601

a7.

2PCS.

BRY

BATTERY

IZE"C”

55)

aed

IEC

isk

Hao

ieee

LCD

BRIVER/CONTROL

MOTOR

6PCS.

1¢901

PC2

PC1

PCO

LCD1—LC813,

COM1-COMS

6))

OBO

eee

§301-904

Nero!

75KHz

Lea

—10—

CFS-B31/B31L

5-3.

PRINTED

WIRING

BOARD

—

TUNER/LCD

SECTION

—

eae

Location

ANT

D-1

TELESCOPIC

D-4

ANTENNA

C-4

[TUNER

BOARD]

F-3

D-5

F-8

ANT

F-13

E-12

_FERRITE

ANTENNA

-8

mmo

NOOR

BRAOH

mnonom

{

AUDIO

1.9

BOARD

—

ae.

Bako

[LCD

BOARD]

TATE

Bed

IWS

eee

‘

meres

echt

Ranneaeaige

CFS

fe)

ner

DRY

]

genus

SIZE

"AA"

Popes

oeSSee

ceases

oer

('ec

DESIGNATION)

;

enn

gee

areal

Seem

eS.

2PCS.3V

AUDIO/POWER

SECTION

656-661

o——

parts

extracted

from

the

component

side.

internal

component.

Pattern

from

the

side

which

enable

seeing.

=A.

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