Sony CFD-50 Manuale utente

Model

Canadian

Model

SPECIFICATIONS

AUDIO

POWER

SPECIFICATIONS

(US

model)

Full-range

speakers:

With

3.2-ohm

loads,

both

channels

driven

from

150-15,000

Hz:

rated

2.3

per

channel

mini-

mum

RMS

power,

with

than

10%

total

harmonic

distortion

operation.

OTHER

SPECIFICATIONS

player

section

System

Laser diode

properties

Compact

disc

digital

audio

system

Material:

GaAlAs

Wavelength

780

Emission

duration:

Continuous

Laser

output:

less

than

44.6

p.W

This

output

the

value

measured

dis-

tance

about

200

from

the

objective

lens

surface

the

optical

pick-up

block.

20-—20,000

Below

measurable

limit

Frequency

response

Wow

and

flutter

Tuner

section

Frequency

range

FM:

87.6—108

MHz

AM:

530—1,710

kHz

Tape

recorder

section

and

general

Recording

system

4-track

2-channel

stereo

Frequency

response

—

10,000

(with

TYPE

(NORMAL)

cassette)

Full-range

speakers:

dia.,

cone

type

Full-range

speakers:

2.3W+2.3W

(at

3.2

ohms,

315

Hz,

10%

harmonic

distortion)

Speaker

Power

output

(Canadian

mode!)

Section

Tape

Section

Model

Name

Using

Similar

Mechanism

Optical

Device

Name

MF-50RP-75D

Tape

Transport

Mechanism

Type

Inputs

Mixing

microphone

input

jack

(minijack)

Sensitivity

2.5

For

low

impedance

microphone

Outputs

Headphones

jack

(stereo

minijack)

For

16—68

ohms

impedance

headphones

120

AC,

size

(R20)

batteries

Power

requirements

Power

consumption

Battery

life

Batteries

for

radio

cassette-corder

(hours)

[_SS*d;CF

Recording

[Playback

Sony

SUM-1

(NS)

Sony

Alkaline

AM1

(N)

approx.

Dimensions

590

172

200

(w/h/d)

(23/4

67/,

7/3

inches)

incl.

projecting

parts

and

controls

Weight

Approx.

4.6

kg,

incl.

batteries

(Approx.

oz)

Supplied

accessories

power

cord

(1)

Design

and

specifications

subject

change

without

notice.

RADI

CFD-50

SAFETY

CHECK-OUT

After

correcting

the

original

service

problem,

perform

the

following

safety

check

before

releasing

the

set

the

customer:

Check

the

antenna

terminals,

metal

trim,

‘‘metallized”’

knobs,

screws,

and

all

other

exposed

metal

parts

for

leakage.

Check

leakage

described

below.

LEAKAGE

TEST

The

leakage

from

any

exposed

metal

part

earth

ground

and

from

all

exposed

metal

parts

any

exposed

metal

part

having

return

chassis,

must

not

exceed

0.5mA

(500

microampers).

Leakage

current

can

measured

any

one

three

methods.

commercial

leakage

tester,

such

the

Simpson

229

RCA

WT-540A.

the

manufacturers’

instructions

use

these

instru-

ments.

battery-operated

milliammeter.

The

Data

Precision

245

digital

multimeter

suitable

for

this

job.

Measuring

the

voltage

drop

across

resistor

means

VOM

battery-operated

volt-

meter.

The

“limit”

indication

0.75

analog

meters

must

have

accurate

low-

voltage

scale.

The

Simpson

250

and

Sanwa

SH-63Trd

are

examples

passive

VOM

that

suitable.

Nearly

all

battery

operated

digital

multimeters

that

have

range

are

suitable.

(See

Fig.

Exposed

Metal

Parts

Set

voltmeter

(0.75

Earth

Ground

Using

voltmeter

check

leakage.

TABLE

CONTENTS

Section

Title

Page

Specifications

sass

sors

Hepes

aciued

dea

csoees

Safety

Check-out

#098

Sie!

aig

ees

aitele,

858.08

02.6,

SERVICING

NOTES

Notes

Handling

the

Optical

Pickup

Block

Base

Unit

Notes

Laser

Diode

Emission

Check

-----+-

Chuck

Plate

Jig

Repairing

--+++++++++eee-

Laser

Diode

and

Focus

Operation

Check

GENERAL.

«222%

+sisse

cbse

smesysee

dunes

DISASSEMBLY

..----.-----eecceeecceees

MECHANICAL

ADJUSTMENTS

Tape

Recorder

Section

-++++eeeeeeeeeeeeeee

ELECTRICAL

ADJUSTMENTS

5-1.

Tape

Recorder

Section

--+++++err

essere

sees

5-2.

Tuner

Section

Ostia

pa,

Bie:

ele

cone!

Bete.

e-e

eee

wie

eos

5-3.

Section

Oe:

S18)

0060

Sah

eee

wae

DIAGRAMS

6-1.

Section

Block

Diagram

-+++++++++++-+-+--

6-2.

Tuner,

Audio

Section

Block

Diagram

-+---++:-

6-3.

Printed

Wiring

Boards

---+++-++++eee

eee

eeee

6-4.

Tuner,

Audio

Section

Schematic

Diagram

6-S.

Section

Schematic

Diagram

-++++++++++-

EXPLODED

VIEWS

.«.---------eseeeeeee

ELECTRICAL

PARTS

LIST

.-----------

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

PUB.

LISHED

SONY.

ATTENTION

COMPOSANT

AYANT

RAPPORT

SECURITE!

LES

COMPOSANTS

IDENTIFIES

PAR

UNE

MARQUE

SUR

LES

DIAGRAMMES

SCHEMATIQUES

LISTE

DES

PIECES

SONT

CRITIQUES

POUR

SECURITE

FONCTIONNEMENT.

REMPLACER

CES

COM.

POSANTS

QUE

PAR

DES

PIECES

SONY DONT

LES

NUMEROS

SONT

DONNES

DANS

MANUEL

DANS

LES

SUPPLEMENTS

PUBLIES

PAR

SONY.

SECTION

CFD-50

SERVICING

NOTES

HANDLING

THE

OPTICAL

PICK-

BLOCK

BASE

UNIT

The

laser

diode

the

optical

pick-up

block

may

suffer

electrostatic

breakdown

because

the

poten-

tial

difference

generated

the

charged

electrostatic

load,

etc.

clothing

and

the

human

body.

During

repair,

pay

attention

electrostatic

break-

down

and

also

use

the

procedure

the

printed

matter

which

included

the

repair

parts.

The

flexible

board

easily

damaged

and

should

handled

with

care.

NOTES

LASER

DIODE

EMISSION

CHECK

The

laser

beam

this

model

concentrated

focused

the

disc

reflective

surface

the

objective

lens

the

optical

pick-up

block.

There-

fore,

when

checking

the

laser

diode

emission,

observe

than

away

from

the

objective

lens.

Insert

screwdriver

and

push

S801.

CHUCK

PLATE

JIG

REPAIRING

repairing

section,

playing

disc

without

the

lid,

use

Chuck

Plate

Jig.

Code

number

Chuck

Plate

Jig:

X-4918-255-1

LASER

DIODE

AND

FOCUS

OPERATION

CHECK

Der

eae

Make

Function

switch

position

with

disc

inserted.

Open

the

lid

for

CD.

Turn

S801

following

figure.

Press

key.

Confirm

the

laser

diode

emission

while

observing

the

objecting

lens.

When

there

emission,

Auto

Power

Control

circuit

Optical

Pick-up

broken.

Objective

lens

moves

and

down

once

for

the

focus

serarch.

Yf.

S801

27.

eee

yvilty,

laser

diode

CFD-50

SECTION

GENERAL

Parts

Identification

Radio,

Tape

Section

Player

Section

MIX

MIC

jack

OPRI/BATT

indicator

Telescopic

antenna

FUNCTION

selector

Display

window

PLAY

MODE

button

Disc

holder

TONE

control

OPEN

button

VOLUME

cont

PHONES

jack

operation

buttons

Cassette

holder

Tape

operation

buttons

REMAIN/ENTER

button

indicator

SECTION

DISASSEMBLY

Note:

the

disassembly

procedure

the

numerical

order

given.

DIAL

POINTER

SETTING

Set

the

center

the

dial

pointer

the

center

three

points

the

sub

chassis.

til

pointer

the

dial

pointer

sub

chassis

dial

pointer

Turn

PVC

gear

fully

counter-clockwise

with

the

tuning

knob.

tuner

board

Insert

the

tuning

knob

Turn

the

tuning

knob

the

order

frequency

MAX

~->

MIN

and

confirm

the

dial

pointer

not

out

order.

+BVIP3

CFD-50

FRONT

CABINET

Open

cassette

holder.

CNJ302

front

cabinet

BVTP3

battery

case

lid

+BVTP3

TUNER

BOARD

+BVTP3

tuner

board

es,

SECTION

CNJ21

CNJ306

MAIN

BOARD

AUDIO

BOARD

OSB

Trs

rik

main

board

Remove

two

volume

knobs.

Slide

out

section

(VOLUME,

TONE)

+BVTP3

129

+BVTP3

audio

board

POWER

BOARD

+BVTP3

power

board

CFD-50

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

demagentizer.

(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.

Power

supply

voltge:

dc.

Torque

Measurement

22.5

—

gecm

Fast

Forward

and

—

120

g*cm

(0.83

1.67

ozrinchy

COMI

—

Sgecm

(0.03

0.07

ozrinchy

Tape

Tension

Measurement

CQ-403A

than

150

(5.29

02)

SECTION

ELECTRICAL

ADJUSTMENTS

PRECAUTION

Adjustments

should

performed

the

order

given.

Generally

playback

circuit

adjustments

should

completed

before

performing

recording

circuit

adjustments.

Adjustments

should

performed

for

both

L-ch

and

R-ch.

Switches

and

controls

should

set

follows

unless

otherwise

specified.

Positions

switches

and

control

knobs

TONE

OOO

ROHS

ie:

CLO

0168.

O08

6.656

SOE

0180

O88

are)

maximum

Standard

recording

position

Adjust

the

VOLUME

knob

that

the

following

regulated

input/output

signal

levels

are

obtained.

Standard

input

level

[—__tput

ind

Standard

output

level

[Output

[Speaker

A)]

PHONES

Output

signal

level

“0

)

Wee

dB=0.775

5-1.

TAPE

RECORDER

SECTION

Test

Tape

Type

Signal

Used

for

WS-48A

kHz,

tape

speed

adjustment

P-4-A063

6.3kHz,

—

head

azimuth

adjustment

REC/PB

Head

Azimuth

Adjustment

Procedure:

Mode:

playback

test

tape

P-4-A063

(6.3kHz,

—

10dB)

PHONES

jack

Turn

the

adjustment

screw

for the

maximum

output

levels.

these

levels

not

match,

turn

the

adjustment

screw

until

both

output

levels

match

together

within

dB.

L-CH

peak

within

Output

Zan

within

level

3d8

}

R-CH

screw

peak

aie

osition

positi

L-CH

R-CH

—*

angle

peak

Phase

Check

Mode:

playback

test

tape

P.4-A063

oscilloscope

(6.3kHiz,

—

10d8)

320

PHONES

jack

®C4

Screen

pattern

O@®

135°

180°

wrong

phase

45° 90°

oceennmennteenmmeenen

ammamenmemeeemenamnenendtl

good

Adjustment

Location:

adjustment

screw

CFD-50

Tape

Speed

Adjustment

Procedure:

Mode:

playback

speed

checker

LFM-30

digital

frequency

test

tape

counter

WS-48A

(3kHz,

OdB)

PHONES

jack

Adjustment

Value:

Speed

checker

Digital

frequency

counter

—

2.5

+1.0%

2,925

—

3,030

Frequency

difference

between

the

beginning

and

the

end

the

tape

should

within

(30

Hz).

Adjustment

Location:

adjustment

resistor

CFD-50

5-2.

TUNER

SECTION

[AM]

FUNCTION

switch:

SSG

Put

the

lead-wire

antenna

the

set.

(QE

30%

amplitude

modulation

400

signal

output

level:

low

possible

[FM]

FUNCTION

switch:

SSG

22.5

kHz

frequency

deviation

‘by

400

signal

output

level:

low

possible

ANT

PHONES

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

VITVM.

455

kHz

FREQUENCY

COVERAGE

ADJUSTMENT

Adjust

for

maximum

reading

VM.

520

kHz

1,780

kHz

TRACKING

ADJUSTMENT

Adjust

for

maximum

reading

VTVM.

600

kHz

1,500

kHz

TRACKING

ADJUSTMENT

Adjust

for

maximum

reading

VTVM.

86.5

MHz

109.5

MHz

VCO

Adjustment

Regular

Method

Procedure:

signal

generator

Carrier

frequency

98MHz

telescopic

Modulation:

modulation

antenna

lead

Output

level:

0.1V

(100dB)

Remove

jumper

wire

shown

below.

Connect

frequency

counter

the

positions

shown

below.

Tune

the

set

MHz.

Adjust

RV1

for

kHz

500

reading

the

frequency

counter.

After

adjustment,

connect

jumper

wire

removed

step

Remove

jumper

wire

Aaa

Noe

frequency

counter

nee)

Bere

Simple

Method

Procedure:

Tune

the

set

the

stereo

broadcasting

signal.

Turn

RV1

clockwise

counterclockwise

and

memorize

the

lighting-

range

the

STEREO

lamp.

Secure

RVI

the

center

the

lighting-up

range

both

turns

shown

below.

center

lighting-up

ranges

lighting-up

range

iO)

Sao

RVI

FREQUENCY

EMVvco

COVERAGE

RV1

cCT2

TRACKING

CTi

CT4

AMIE

CEM

FREQUENCY

—38—

TRACKING

GovERAGE

5-3.

SECTION

How

Put

the

Set

into

Service

Mode

Notes

Adjustment

Perform

adjustment

service

mode.

After

adjustment,

sure

release

service

mode.

Perform

adjustments

the

order

given.

Use

the

disc

(YEDS-18,

Part

No.

3-702-101-01)

only

when

indicated.

Short-circuit

following

portions

the

main

board.

Tune

the

POWER

on.

main

board

(conductor

side)

short-circuit

Before

Adjustment

Put

the

set

into

service

mode

and

perform

the

following

checks.

Repair

there

are

any

problems.

[ee

Sled

Motor

Check

Press

key,

then

press

key.

Press

PPI,

keys

and

confirm

that

the

FOP

moves

smoothly

from

the

innermost

outermost

circumference

and

back

smoothly

and

with

catching

abnormal

noises.

pb]

FOP

moves

the

outer

circumference

K4q

FOP

moves

the

inner

circumference

Focus

Check

Press

key.

(Focus

operation

performed

continuously.)

Look

the

FOP

objective

lens

and

confirm

that

moves

and

down

smoothly,

with

catching

abnormal

noises.

Press

key.

Confirm

that

focus

operation

stops.

does

not,

press

key

again

longer.

VCO

Adjustment

Procedure:

1..

Short-circuit

portion

main

board.

Adjust

with

RV703

that

the

reading

frequency

counter

becomes

4.3218

MHz.

Release

the

short-circuit

portion.

Adjustment

Location:

main

board

(conductor

side)

frequency

counter

E-F

Balance

Adjustment

This

adjustment

done

when

the

optical

block

replaced.

Adjustment

Procedure:

Connect

the

oscilloscope

between

IC701

pins

and

Put

the

set

into

service

mode.

(See

page

Press

the

PP]

and

k4q

keys

move

the

FOP

the

center.

Insert

disc

(YEDS-18)

and

press

}

key.

Adjust

RV701

that

the

oscilloscope

traverse

waveform

symmetrical,

shown

the

figure

below.

Release

service

mode

after

adjustment

completed.

VOLT/DIV:

TIME/OIV:

Ims

Adjustment

Location:

main

board

(conductor

side)

RV702

RV701

Focus

Bias

Adjustment

This

adjustment

done

when

the

optical

block

replaced.

Adjustment

Procedure:

Connect

the

oscilloscope

between

IC701

pins

and

Put

the

set

into

service

mode.

(See

page

Press

the

PP]

and

K¢q

keys

move

the

FOP

the

center.

(Move

the

FOP

the

music

area

the

disc

enable

easy

visibility

the

eye

pattern.)

Insert

disc

(YEDS-18)

and

press

key.

Adjust

RV702

that

the

oscilloscope

waveform

shown

the

figure

below(eye

pattern).

good

eye

pattern

means

that

the

diamond

shape

(©

)

the

center

the

waveform

can

clearly

distinguished.

Release

service

mode

after

adjustment

completed.

signal

reference

waveform

(eye

pattern)

\RXANA

Wie

VOLT/OIV

0.2V

TIME/OIV

500ns

0.8

—

1.5

Vp-p

Hii

Way

When

observing

the

eye

patern,

set

the

oscilloscope

for

range

and

raise

vertical

sensitivity.

E-F

Balance

Adjustment

oscilloscope

(DC

range)

Focus

Bias

Adjustment

oscilloscope

(DC

range)

Indice

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