Sony CFD-449 Manuale utente

SERVICE

MANUAL

AUDIO

POWER

SPECIFICATIONS

(US

MODEL)

POWER

OUTPUT

AND

TOTAL

HARMONIC

DISTORTION

SPECIFICATIONS

CFD-449

Model

Canadian

Model

isle

DIGITAL

AUDIO

MEGA

BASS

CFD-440

NEW

KSM-2101

BAN

MF-445-102

Model

Name

Using

Section

Similar

Mechanism

Tape

Section

Optical

Device

Name

Tape

Transport

Mechanism

Type

With

3.2-ohm

loads,

both

channels

driven

from

150-15,000

Hz;

rated

per

channel-minimum

RMS

power,

with

than

total

harmonic

distortion

operation.

Other

Specifications

player

section

System

Laser

diode

properties

Spindie

speed

Error

correction

Number

channels

Frequency

response

Wow

and

flutter

Radio

section

Frequency

range

Antennas

Compact

disc

digital

audio

system

Material:

GaAlAs

Wave

length:

780

Emission

duration:

Continuous

Laser

output:

Less

than

44.6

(This

output

the

value

measured

distance

adout

200

trom

the

oodjective

lens

surface

the

optical

pick-up

block.)

200

r/min

(rpm)

$00

r/min

(rpm)

(CLV)

Sony

Refined

Super

Strategy

Cross

interleave

Reed

Solomon

Code

20--20,000

Below

measurable

limit

FM:

87.6-108

MHz

AM:530—1,710

kHz

FM:

Telescopic

antenna

AM:

Built-in

ferrite

bar

antenna

Cassette-corder

section

Recording

system

Frequency

response

4-track

2-channel

stereo

TYPE

(normal)

cassette:

80-10,000

General

Speaker

Woofer:

dia.,

3.2

ohms

cone

type

Tweeter:

2cm

Inputs

Mixing

microphone

input

jack

(minijack):

Sensitivity

2.5

For

low

impedance

microphone

Outputs

Headphones

jack

(stereo

minijack)

For

16-68

ohms

impedance

headphones

Power

outout

2.3W+2.3W

(except

model)

(at

3.2

ohms,

10%

harmonic

operation)

Power

requirements

120

AC,

size

(R20)

batteries

Power

consumption

17W

Battery

life

For

radio

cassette-corder:

recording

Tape

playback

Sony

SUM-1

(NS)

approx.

11h

approx.

aoorox.

Sony

Alkaline

AM1

approx.

17h

avorox.

12h

aporox.

Dimensions

Approx.

588

231

207

(wit/d)

(23%

9'4

874

in.)

inci.

projecting

parts

Mass

7.2

(15

02)

(incl.

batteries)

Supplied

accessories

power

cord

(1)

Design

and

specifications

subject

change

without

notice.

RADIO

CASSETTE-CORDER

SONY.

SAFETY

CHECK-OUT

(US

MODEL)

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-S540A.

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-

The

“limit”

indication

0.75

low-

meter.

analog

meters

must

have

accurate

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

Fig.

Using

voltmeter

check

leakage.

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.

TABLE

CONTENTS

Section

Title

Page

SERVICING

NOTES

...........................005.

DISASSEMBLY

2-1.

Front

Cabinet

Section

..........

0.0.0

cee

eee

2-2.

Pointer

Setting

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

eens

MECHANICAL

ADJUSTMENTS....................

ELECTRICAL

ADJUSTMENTS

4-1.

Tape

Recorder

Section

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

00.

cece

eee

4-2.

Tuner

Section.......

000.0000.

ccc

eee

ees

4-3,

Section

.........

0.0.

cece

cee

eee eee

DIAGRAMS

d-l.

Circuit

Boards

Location

.....................0..

5-2.

Block

Diagram.........

2...

cece

eens

5-3.

Semiconductor

Lead

Layouts

...............0005.

5-4.

Printed

Wiring

Boards—Tuner/Audio/

Mechanism

Deck/Power

Section—

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

5-5.

Schematic

Diagram—Tuner

Section—

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

5-6.

Schematic

Diagram—Audio/Mechanism

Deéck/

‘Power

Section—

.......

0.0.6

ccc

cece

eens

0-7.

Schematic

Diagram—CD

Section—

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

5-8.

Printed

Wiring

Boards—CD

Section—

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

EXPLODED

VIEWS

6-1.

Cabinet

Section

.........

0...

cece

eee

6-2.

Front

Cabinet

Section

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

0...

cece

eee

6-3.

Mechanism

Deck

Section

(1)

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

6-4.

Mechanism

Deck

Section

(2)

................205.

6-5.

Block

Section

.........

0...

eee

6-6.

Optical

Pick-up

Section

«1.2.0.2...

00.

eee

6-7.

Speaker

Section

.........

0...

cece

eee

ene

ELECTRICAL

PARTS

LIST

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

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

SERVICING

NOTES

BLOCK

BASE

UNIT

The

laser

diode

the

optical

pick-up

block

may

suffer

electrostatic

breakdown

because

the

potential

difference

generated

the

charged

electrostatic

load,

etc.

clothing

and

the

human

body.

During

repair,

pay

attention

electrostatic

breakdown

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.

Therefore,

when

checking

the

laser

diode

emission,

observe

than

25cm

away

from

the

objective

lens.

LASER

DIODE

AND

FOCUS

OPERATION

CHECK

Turn

POWER

switch

with

disc

inserted

and

make

Function

switch

position.

Open

the

lid

for

CD.

Turn

$704

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

three

times

for

the

focus

search.

CHUCK

PLATE

JIG

REPAIRING

repairing

section,

playing

disc

without

the

lid,

use

Chuck

Plate

Jig.

Code

number

Chuck

Plate

Jig:

X-4918-255-1

———~

Ges)

SECTION

DISASSEMBLY

Note

the

disassembly

procedure

the

numerical

order

given.

2-1.

FRONT

CABINET

SECTION

BVTP3x12

BTP3xX10

Connector

BVTP3

X20

Front

cabinet

assy

BVTP3X12

2-2.

POINTER

SETTING

AUDIO

MAIN

board

Set

the

pointer

the

center

scracthed

lines.

Turn

TUNING

CAPACITOR

GEAR

counterclockwise

the

end.

claw

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.

Power

supply

voltage:

dc.

Torque

Measurement

20—60g*°cm

(0.28—0.83

oz*inch)

cain

inate

Sch

Tape

Tension

Measurement

Meter

Reading

than

70g

(more

than

2.47

oz)

Meter

reading

Torque

meter

Mode

Tension

meter

Forward

CQ-403A

CQ:408R

SECTION

ELECTRICAL

ADJUSTMENTS

4-1.

TAPE

RECORDER

SECTION

Standard

Output

Level

Output

terminal

OUT

O75

046)

025

(—108)

Test

Tape

Type

Signal

Tape

Speed

Adjustment

Setting

FUNCTION

switch:

TAPE

Procedure

speed

checker

Mode:

playback

aise

digital

frequency

test

tape

counter

WS-48A

(3kHz,

OdB)

eo)

320

HEE

Phones

jack

Adjustment

Value:

Speed

checker

Digital

frequency

counter

—3%

+3%

2,910

3,090Hz

Frequency

difference

between

the

beginning

and

the

end

the

tape

should

within

+1.5%

(45Hz).

Adjustment

Location

adjustment

resistor

(RV401)

(included

motor

assy

(M601))

4-2.

TUNER

SECTION

Section

Setting

FUNCTION

switch:

RADIO

BAND

switch

signal

generator

telescopic

antenna

input

O.0LuF

22.5kHz

frequency

deviation

400Hz

signal

output

level:

low

possible

Section

Setting

FUNCTION

switch:

RADIO

BAND

switch

signal

generator

Put

the

lead-wire

antenna

the

set.

(GEaaEee

30%

amplitude

modulation

400Hz

signal

VTVM

(range:

0.5—-5V

ac)

Phones

jack

Repeat

the

procedures

each

adjustment

several

times,

and

the

frequency

coverage

and

tracking

adjustments

should

finally

done

the

trimmer

capacitors.

Remove

telescopic

antenna

section

adjustments.

FREQUENCY

COVERAGE

ADJUSTMENT

Adjust

for

maximum

reading

VM.

CT1-2

86.5MHz

109.5MHz

TRACKING

ADJUSTMENT

Adjust

for

maximum

reading

VIVM.

86.5MHz

109.5MHz

FREQUENCY

COVERAGE

ADJUSTMENT

Adjust

for

maximum

reading

VM.

520kHz

1,780kHz

TRACKING

ADJUSTMENT

Adjust

for

maximum

reading

VM.

CT1-3

620kHz

1,400kHz

ADJUSTMENT

Adjust

for

maximum

reading

VM.

455kHz

Adjustment

Location

main

board

VCO

ADJUSTMENT

MAIN

BOARD—Conductor

side—

Setting

SSG

0.001

C——}

——-_ICi

Modulation:

modulation

Output

level:

0.1V

(100dB)

FERRITE-ROD

ANTENN

Carrier

Frequency:

According

the

color

the

mark

ceramic

(CF2).

10.67

MHz

10.73

MHz

10.64

MHz

10.76

MHz

Procedure

Adjust

RV1

that

the

reading

the

frequency

counter

becomes

76.0kHz

+0.3kHz.

Adjustment

Location

main

board

(FM

VCO)

33kQ

frequency

counter

wetsov

|__|

MAIN

BOARD—Component

side—

TELESCOPIC

ANTENNA

INPUT

FREQUENCY

COVERAGE

CT1-2

Ale

TRACKING

CT1-3

ies

TRACK

ING

ADJ

ree

FREQUENCY

CT1-4

COVERAGE

ADJ

4-3.

SECTION

Notes

Adjustment

Perform

adjustment

test

mode.

After

adjustment,

sure

release

test

mode.

Perform

adjustments

the

order

given.

Use

the

disc

(YEDS-18,

Part

No.

3-702-101-01)

only

when

indicated.

Before

Adjustment

Put

the

set

into

test

mode

and

perform

the

following

checks.

Repair

there

are

any

problems.

Sled

Motor

Check

Press

button,

then

press

button.

Press

PPI,

buttons

and

confirm

that

the

FOP

moves

smoothly

from

the

innermost

outermost

circumference

and

back

smoothly

and

with

catching

abnormal

noises.

>i:

FOP

moves

the

outer

circumference

Kd:

FOP

moves

the

inner

circumference

Focus

Check

Press

button.

(Focus

operation

performed

continuously.)

Look

the

FOP

objective

lens

and

confirm

the

moves

and

down

smoothly,

with

catching

abnormal

noises.

Press

button.

Confirm

that

focus

operation

stops.

does

not,

press

button

again

longer.

How

Put

the

Set

into

Test

Mode

Short

the

following

portion

the

CONTROL

board.

Turn

the

FUNCTION

selector

position.

{CD

CONTROL

BOARD]

Traverse

Adjustment

This

adjustment

done

when

the

optical

pick-up

block

replaced.

Procedure:

oscilloscope

(DC

range)

T(E)

main

board

(VREF)

Put

the

set

into

test

mode.

Connect

the

oscilloscope

between

(TE)

and

(VREF).

Press

the

»Pl

and

K€

buttons

move

the

FOP

the

center.

Insert

disc

(YEDS-18)

and

press

button.

Adjust

RV701

that

the

oscilloscope

traverse

waveform

symmetrical,

shown

the

figure

below.

Release

test

mode

after

adjustment

completed.

VOLT/DIV:

TIME/DIV:

1mS

Adjustment

value:

1.7+0.8Vp-p

(A+B)

Adjustment

Location

main

board

(See

page

11.)

Short

the

jumper

wire.

Focus

Bias

Adjustment

This

adjustment

done

when

the

optical

pick-up

block

replaced.

Procedure:

oscilloscope

(DC

range)

(RFO)

(VREF)

main

board

{

Put

the

set

into

test

mode.

Connect

the

oscilloscope

between

(RFO)

and

(VREP).

Press

the

and

buttons

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

button.

Adjust

RV702

that

the

oscilloscope

waveform

shown

the

figure

below

(eye

pattern).

good

eye

pattern

means

that

the

diamond

scape

(©)

the

center

the

waveform

can

clearly

distinguished.

Release

test

mode

after

adjustment

completed.

signal

reference

waveform

(eye

pattern)

TYTN

TTY

0000000000

1.27

54Vee

WAN

VOLT/DIV:

0.2V

TIME/DIV:

500mS

\XY)

eaa

VDODADBOHABABHOO

When

observing

the

eye

pattern,

set

the

oscilloscope

for

range

and

raise

vertical

sensitivity.

Adjustment

Location

main

board

(See

page

11.)

Focus/Tracking

Gain

Adjustment

frequency

response

analyzer

necessary

order

perform

this

adjustment

exactly.

However,

this

gain

has

margin,

even

slightly

off,

there

problem.

Therefore,

not

perform

this

adjust-

ment.

Focus/tracking

gain

determines

the

pick-up

follow-up

(ver-

tical

and

horizontal)

relative

mechanical

noise

and

me-

chanical

shock

when

the

2-axis

device

operate.

However,

these

reciprocate,

the

adjustment

the

point

where

both

are

satisfied.

When

gain

raised,

the

noise

when

the

2-axis

device

operates

increases.

When

gain

lowered,

susceptible

mechanical

shock

and

skipping

occurs

easily.

When

gain

adjustment

off,

the

symptoms

below

appear.

[ee

eThe

time

until

music

starts

becomes

longer

for

-%PD

automatic

selection.

low low

high

(Kd

PP!

buttons

pressed.)

(Nor-

mally

takes

about

seconds.)

eMusic

docs

not

start

and

disc

continues

rotate

for

iow

automatic

selection.

(Kd,

PPI

buttons

pressed.)

eSound

interrupted

during

PLAY.

time

counter

display

low

poise

during

2-axis

device

hish

hich

operation.

. 7

stops

progressing.

The

following

simple

adjustment

method.

—Simple

Adjustment—

Note

Since

exact

adjustmeunt

cannot

performed,

remember

the

positions

the

controls

before

perfor-

ming

the

adjustment.

the

positions

after

the

simple

adjustment

are

only

little

different,

return

the

con-

trols

the

original

position.

oscilloscope

(DC

range)

main

board

oon

Procedure

{

(TE)

Om-

-7

(VREF)

Keep

the

set

horizontal.

the

set

not

horizontal,

this

adjustment

cannot

performed

due

the

gravity

against

the

axis

device.

Put

the

set

into

test

mode.

Connect

oscilloscope

main

board

(FE).

Insert

disc

(YEDS-18)

and

press

button.

Adjustment

RV703

that

the

waveform

shown

the

figure

below.

(focus

gain

adjustment)

Cont

VOLT/DIV:

100mV

TIME/DIV:

2mS

100mV

AY"

Incorrent

Examples

(DC

level

changes

than

adjust-

waveform)

low

focus

gain

TIME/DIV:

2mS

250mV

high

focus

gain

TIME/DIV:

2mS

100mv

75mvV

VOLT/DIV:

100mvV

VOLT/DIV:

100mv

Connect

oscilloscope

(TE).

Adjust

RV704

that

the

waveform

shown

the

figure

below.

(tracking

gain

adjustment)

Release

test

mode

after

adjustment

completed.

VOLT/DIV:

TIME/DIV:

2mS

Incorrect

Examples

(fundamental

wave

appears)

low

tracking

gain

VOLT/DIV:

TIME/DIV:

2mS

high

tracking

gain

(higher

fundamental

wave

than

for

low

gain)

VOLT/DIV:

TIME/DIV:

2mS

Indice

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