Sony CFD-449 User manual

Table of contents

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SERVICE

MANUAL

AUDIO

POWER

SPECIFICATIONS

(US

MODEL)

POWER

OUTPUT

AND

TOTAL

HARMONIC

DISTORTION

SPECIFICATIONS

CFD-449

US

Model

Canadian

Model

|

isle

DIGITAL

AUDIO

MEGA

BASS

CFD-440

NEW

KSM-2101

BAN

MF-445-102

Model

Name

Using

|

CD

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

2

W

per

channel-minimum

RMS

power,

with

no

more

than

10

%

total

harmonic

distortion

in

AC

operation.

Other

Specifications

CD

player

section

System

Laser

diode

properties

Spindie

speed

Error

correction

Number

of

channels

Frequency

response

Wow

and

flutter

Radio

section

Frequency

range

Antennas

Compact

disc

digital

audio

system

Material:

GaAlAs

Wave

length:

780

nm

Emission

duration:

Continuous

Laser

output:

Less

than

44.6

uW

(This

output

is

the

value

measured

at

a

distance

of

adout

200

mm

trom

the

oodjective

lens

surface

on

the

optical

pick-up

block.)

200

r/min

(rpm)

to

$00

r/min

(rpm)

(CLV)

Sony

Refined

Super

Strategy

Cross

interleave

Reed

Solomon

Code

2

20--20,000

Hz

=

1

dB

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

I

(normal)

cassette:

80-10,000

Hz

General

Speaker

Woofer:

10

cm

dia.,

3.2

ohms

cone

type

Tweeter:

2cm

Inputs

Mixing

microphone

input

jack

(minijack):

Sensitivity

2.5

mV

For

low

impedance

microphone

Outputs

Headphones

jack

(stereo

minijack)

For

16-68

ohms

impedance

headphones

Power

outout

2.3W+2.3W

(except

US

model)

(at

3.2

ohms,

10%

harmonic

in

DC

operation)

Power

requirements

120

V

AC,

60

Hz

DC

9

V,

6

size

D

(R20)

batteries

Power

consumption

AC

17W

Battery

life

For

CD

radio

cassette-corder:

.

FM

recording

Tape

playback

CD

playback

Sony

SUM-1

(NS)

approx.

11h

approx.

8h

aoorox.

5h

Sony

Alkaline

AM1

approx.

17h

avorox.

12h

aporox.

7h

Dimensions

Approx.

588

x

231

x

207

mm

(wit/d)

(23%

x

9'4

x

874

in.)

inci.

projecting

parts

Mass

7.2

kg

(15

Ib

14

02)

(incl.

batteries)

Supplied

accessories

AC

power

cord

(1)

Design

and

specifications

subject

to

change

without

notice.

CD

RADIO

CASSETTE-CORDER

SONY.

SAFETY

CHECK-OUT

(US

MODEL)

After

correcting

the

original

service

problem,

perform

the

following

safety

check

before

releasing

the

set

to

the

customer:

Check

the

antenna

terminals,

metal

trim,

‘‘metallized”

knobs,

screws,

and

all

other

exposed

metal

parts

for

AC

leakage.

Check

leakage

as

described

below.

LEAKAGE

TEST

The

AC

leakage

from

any

exposed

metal

part

to

earth

ground

and

from

all

exposed

metal

parts

to

any

exposed

metal

part

having

a

return

to

chassis,

must

not

exceed

0.5mA

(500

microampers).

Leakage

current

can

be

measured

by

any

one

of

three

methods.

1.

A

commercial

leakage

tester,

such

as

the

Simpson

229

or

RCA

WT-S540A.

Follow

the

manufacturers’

instructions

to

use

these

instru-

ments.

tw

A

battery-operated

AC

milliammeter.

The

Data

Precision

245

digital

multimeter

is

suitable

for

this

job.

3.

Measuring

the

voltage

drop

across

a

resistor

by

means

of

a

VOM

or

battery-operated

AC

volt-

The

“limit”

indication

is

0.75

V,

so

low-

meter.

analog

meters

must

have

an

accurate

voltage

scale.

The

Simpson

250

and

Sanwa

SH-63Trd

are

examples

of

a

passive

VOM

that

is

suitable.

Nearly

all

battery

operated

digital

multimeters

that

have

a

2V

AC

range

are

suitable.

(See

Fig.

A)

To

Exposed

Metal

Parts

on

Set

AC

voltmeter

(0.75

V)

=

Earth

Ground

Fig.

A.

Using

an

AC

voltmeter

to

check

AC

leakage.

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

BY

MARK

A\

OR

DOTTED

LINE

WITH

MARK

/\

ON

THE

SCHEMATIC

DIAGRAMS

AND

IN

THE

PARTS

LIST

ARE

CRITICAL

TO

SAFE

OPERATION.

REPLACE

THESE

COMPONENTS

WITH

SONY

PARTS

WHOSE

PART

NUMBERS

APPEAR

AS

SHOWN

IN

THIS

MANUAL

OR

IN

SUPPLEMENTS

PUB-

LISHED

BY

SONY.

TABLE

OF

CONTENTS

Section

Title

Page

1.

SERVICING

NOTES

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

3

2.

DISASSEMBLY

2-1.

Front

Cabinet

Section

..........

0.0.0

c

cee

eee

eee

4

2-2.

Pointer

Setting

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

eens

4

3.

MECHANICAL

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

5

4.

ELECTRICAL

ADJUSTMENTS

4-1.

Tape

Recorder

Section

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

00.

cece

eee

eee

5

4-2.

Tuner

Section.......

000.0000.

c

ccc

eee

eee

eee

ees

6

4-3,

CD

Section

.........

0.0.

cece

cece

cee

eee eee

8

5.

DIAGRAMS

d-l.

Circuit

Boards

Location

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

12

5-2.

Block

Diagram.........

2...

cece

cece

eens

13

5-3.

Semiconductor

Lead

Layouts

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

15

5-4.

Printed

Wiring

Boards—Tuner/Audio/

Mechanism

Deck/Power

Section—

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

16

5-5.

Schematic

Diagram—Tuner

Section—

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

19

5-6.

Schematic

Diagram—Audio/Mechanism

Deéck/

‘Power

Section—

.......

0.0.6

ccc

cece

cece

eens

21

0-7.

Schematic

Diagram—CD

Section—

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

25

5-8.

Printed

Wiring

Boards—CD

Section—

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

29

6.

EXPLODED

VIEWS

6-1.

Cabinet

Section

.........

0...

cece

eee

33

6-2.

Front

Cabinet

Section

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

0...

cece

eee

ee

34

6-3.

Mechanism

Deck

Section

(1)

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

35

6-4.

Mechanism

Deck

Section

(2)

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

36

6-5.

CD

Block

Section

.........

0...

eee

eee

37

6-6.

Optical

Pick-up

Section

«1.2.0.2...

00.

c

eee

eee

ee

eee

38

6-7.

Speaker

Section

.........

0...

cece

cece

eee

ene

39

7.

ELECTRICAL

PARTS

LIST

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

40

ATTENTION

AU

COMPOSANT

AYANT

RAPPORT

A

LA

SECURITE!

LES

COMPOSANTS

IDENTIFIES

PAR

UNE

MARQUE

/\

SUR

LES

DIAGRAMMES

SCHEMATIQUES

ET

LA

LISTE

DES

PIECES

SONT

CRITIQUES

POUR

LA

SECURITE

DE

FONCTIONNEMENT.

NE

REMPLACER

CES

COM-

POSANTS

QUE

PAR

DES

PIECES

SONY

DONT

LES

NUMEROS

SONT

DONNES

DANS

CE

MANUEL

OU

DANS

LES

SUPPLEMENTS

PUBLIES

PAR

SONY.

SECTION

1

SERVICING

NOTES

BLOCK

OR

BASE

UNIT

The

laser

diode

in

the

optical

pick-up

block

may

suffer

electrostatic

breakdown

because

of

the

potential

difference

generated

by

the

charged

electrostatic

load,

etc.

on

clothing

and

the

human

body.

During

repair,

pay

attention

to

electrostatic

breakdown

and

also

use

the

procedure

in

the

printed

matter

which

is

included

in

the

repair

parts.

The

flexible

board

is

easily

damaged

and

should

be

handled

with

care.

NOTES

ON

LASER

DIODE

EMISSION

CHECK

The

laser

beam

on

this

model

is

concentrated

so

as

to

be

focused

on

the

disc

reflective

surface

by

the

objective

lens

in

the

optical

pick-up

block.

Therefore,

when

checking

the

laser

diode

emission,

observe

more

than

25cm

away

from

the

objective

lens.

LASER

DIODE

AND

FOCUS

SEARCH

OPERATION

CHECK

1.

Turn

POWER

switch

on

with

no

disc

inserted

and

make

Function

switch

to

CD

position.

Open

the

lid

for

CD.

Turn

on

$704

as

following

figure.

Press

>

key.

Confirm

the

laser

diode

emission

while

observing

the

objecting

lens.

When

there

is

no

emission,

Auto

Power

Control

circuit

or

Optical

Pick-up

is

broken.

SM

eS

Objective

lens

moves

up

and

down

three

times

for

the

focus

search.

CHUCK

PLATE

JIG

ON

REPAIRING

On

repairing

CD

section,

playing

a

disc

without

the

CD

lid,

use

Chuck

Plate

Jig.

©

Code

number

of

Chuck

Plate

Jig:

X-4918-255-1

———~

Ges)

S

SECTION

2

DISASSEMBLY

Note

:

Follow

the

disassembly

procedure

in

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

to

the

center

of

scracthed

lines.

@

Turn

TUNING

CAPACITOR

GEAR

counterclockwise

to

the

end.

claw

SECTION

3.

MECHANICAL

ADJUSTMENTS

PRECAUTION

—

1.

Clean

the

following

parts

with

a

denatured-alcohol-

moistened

swab:

record/playback

head

pinch

roller

erase

head

rubber

belts

capstan

idlers

2.

Demagnetize

the

record/playback

head

with

a

head

demagnetizer.

(Do

not

bring

the

head

demagnetizer

close

to

the

erase

head.)

3.

Do

not

use

a

magnetized

screwdriver

for

the

adjustments.

4,

After

the

adjustments,

apply

suitable

locking

compound

to

the

parts

adjusted.

5.

The

adjustments

should

be

performed

with

the

rated

power

supply

voltage

unless

otherwise

noted.

6.

Power

supply

voltage:

9V

dc.

Torque

Measurement

20—60g*°cm

ae

(0.28—0.83

oz*inch)

cain

inate

an

Sch

Tape

Tension

Measurement

Meter

Reading

more

than

70g

(more

than

2.47

oz)

Meter

reading

Torque

meter

Mode

Tension

meter

Forward

CQ-403A

CQ:408R

SECTION

4

ELECTRICAL

ADJUSTMENTS

4-1.

TAPE

RECORDER

SECTION

Standard

Output

Level

Output

terminal

SP

OUT

HP

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%

to

+3%

2,910

to

3,090Hz

Frequency

difference

between

the

beginning

and

the

end

of

the

tape

should

be

within

+1.5%

(45Hz).

Adjustment

Location

:

adjustment

resistor

(RV401)

(included

motor

assy

(M601))

ay

4-2.

TUNER

SECTION

@

FM

Section

Setting

:

FUNCTION

switch:

RADIO

BAND

switch

:

FM

FM

rf

signal

generator

telescopic

antenna

input

O.0LuF

22.5kHz

frequency

deviation

by

400Hz

signal

output

level:

as

low

as

possible

@

AM

Section

Setting

:

FUNCTION

switch:

RADIO

BAND

switch

>:

AM

AM

rf

signal

generator

Put

the

lead-wire

antenna

close

to

aa

the

set.

(GEaaEee

30%

amplitude

modulation

by

400Hz

signal

VTVM

(range:

0.5—-5V

ac)

Phones

jack

@

Repeat

the

procedures

in

each

adjustment

several

times,

and

the

frequency

coverage

and

tracking

adjustments

should

be

finally

done

by

the

trimmer

capacitors.

@

Remove

telescopic

antenna

in

FM

section

adjustments.

FM

FREQUENCY

COVERAGE

ADJUSTMENT

Adjust

for

a

maximum

reading

on

VT

VM.

L2

CT1-2

86.5MHz

109.5MHz

FM

TRACKING

ADJUSTMENT

Adjust

for

a

maximum

reading

on

VIVM.

Ll

86.5MHz

109.5MHz

AM

FREQUENCY

COVERAGE

ADJUSTMENT

Adjust

for

a

maximum

reading

on

VT

VM.

520kHz

1,780kHz

AM

TRACKING

ADJUSTMENT

Adjust

for

a

maximum

reading

on

VT

VM.

L3

CT1-3

620kHz

1,400kHz

AM

IF

ADJUSTMENT

Adjust

for

a

maximum

reading

on

VT

VM.

455kHz

Adjustment

Location

:

main

board

FM

VCO

ADJUSTMENT

MAIN

BOARD—Conductor

side—

Setting

:

FM

RF

SSG

0.001

nF

C——}

——-_ICi

pin

Modulation:

no

modulation

Output

level:

0.1V

(100dB)

L3

AM

FERRITE-ROD

ANTENN

we

Carrier

Frequency:

According

to

the

color

of

the

mark

on

ceramic

(CF2).

10.67

MHz

10.73

MHz

10.64

MHz

10.76

MHz

Procedure

:

1.

Adjust

RV1

so

that

the

reading

on

the

frequency

counter

becomes

in

76.0kHz

+0.3kHz.

Adjustment

Location

:

main

board

(FM

VCO)

33kQ

frequency

counter

wetsov

|__|

MAIN

BOARD—Component

side—

TELESCOPIC

ANTENNA

INPUT

FM

FREQUENCY

L2

COVERAGE

CT1-2

AM

Ale

be

TRACKING

CT1-3

ies

FM

L1

TRACK

ING

ADJ

ree

AM

FREQUENCY

CT1-4

COVERAGE

TI

ADJ

4-3.

CD

SECTION

Notes

on

Adjustment

1.

Perform

adjustment

in

test

mode.

_

After

adjustment,

be

sure

to

release

test

mode.

2.

Perform

adjustments

in

the

order

given.

3.

Use

the

disc

(YEDS-18,

Part

No.

3-702-101-01)

only

when

so

indicated.

Before

Adjustment

Put

the

set

into

test

mode

and

perform

the

following

checks.

Repair

if

there

are

any

problems.

e

Sled

Motor

Check

1.

Press

>

button,

then

press

Hi

button.

2.

Press

PPI,

44

buttons

and

confirm

that

the

FOP

moves

smoothly

from

the

innermost

to

outermost

circumference

and

back

smoothly

and

with

no

catching

or

abnormal

noises.

>i:

FOP

moves

to

the

outer

circumference

Kd:

FOP

moves

to

the

inner

circumference

e

Focus

Search

Check

1.

Press

>

button.

(Focus

search

operation

is

performed

continuously.)

2.

Look

at

the

FOP

objective

lens

and

confirm

the

it

moves

up

and

down

smoothly,

with

no

catching

or

abnormal

noises.

3.

Press

if

button.

Confirm

that

focus

search

operation

stops.

If

it

does

not,

press

I

button

again

longer.

How

to

Put

the

Set

into

Test

Mode

1.

Short

the

following

portion

on

the

CD

CONTROL

board.

2.

Turn

the

FUNCTION

selector

to

CD

position.

{CD

CONTROL

BOARD]

04

Traverse

Adjustment

This

adjustment

is

to

be

done

when

the

optical

pick-up

block

is

replaced.

Procedure:

oscilloscope

(DC

range)

T(E)

OO

CD

main

board

es

(VREF)

|

es

1.

Put

the

set

into

test

mode.

2.

Connect

the

oscilloscope

between

TP

(TE)

and

TP

(VREF).

3.

Press

the

»Pl

and

K€

buttons

to

move

the

FOP

to

the

center.

4.

Insert

disc

(YEDS-18)

and

press

>

button.

Adjust

RV701

so

that

the

oscilloscope

traverse

waveform

is

symmetrical,

as

shown

in

the

figure

below.

6.

Release

test

mode

after

adjustment

is

completed.

VOLT/DIV:

1V

TIME/DIV:

1mS

Adjustment

value:

1.7+0.8Vp-p

(A+B)

Adjustment

Location

:

CD

main

board

(See

page

11.)

Short

the

jumper

wire.

Focus

Bias

Adjustment

This

adjustment

is

to

be

done

when

the

optical

pick-up

block

is

replaced.

Procedure:

oscilloscope

(DC

range)

TP

(RFO)

TP

(VREF)

CD

main

board

{

1.

Put

the

set

into

test

mode.

Connect

the

oscilloscope

between

TP

(RFO)

and

TP

(VREP).

3.

Press

the

>I

and

M4

buttons

to

move

the

FOP

to

the

center.

(Move

the

FOP

to

the

music

area

on

the

disc

to

enable

easy

visibility

of

the

eye

pattern.)

Insert

disc

(YEDS-18)

and

press

>

button.

5.

Adjust

RV702

so

that

the

oscilloscope

waveform

is

as

shown

in

the

figure

below

(eye

pattern).

A

good

eye

pattern

means

that

the

diamond

scape

(©)

in

the

center

of

the

waveform

can

be

clearly

distinguished.

6.

Release

test

mode

after

adjustment

is

completed.

e@

RF

signal

reference

waveform

(eye

pattern)

\

TYTN

TTY

0000000000

Vn

1.27

54Vee

\

WAN

My

ny

VOLT/DIV:

0.2V

TIME/DIV:

500mS

9,

\XY)

Nt

eaa

VDODADBOHABABHOO

OV

When

observing

the

eye

pattern,

set

the

oscilloscope

for

AC

range

and

raise

vertical

sensitivity.

Adjustment

Location

:

CD

main

board

(See

page

11.)

Focus/Tracking

Gain

Adjustment

A

frequency

response

analyzer

is

necessary

in

order

to

perform

this

adjustment

exactly.

However,

this

gain

has

a

margin,

so

even

if

it

is

slightly

off,

there

is

no

problem.

Therefore,

do

not

perform

this

adjust-

ment.

Focus/tracking

gain

determines

the

pick-up

follow-up

(ver-

tical

and

horizontal)

relative

to

mechanical

noise

and

me-

chanical

shock

when

the

2-axis

device

operate.

However,

as

these

reciprocate,

the

adjustment

is

at

the

point

where

both

are

satisfied.

e

When

gain

is

raised,

the

noise

when

the

2-axis

device

operates

increases.

e

When

gain

is

lowered,

it

is

more

susceptible

to

mechanical

shock

and

skipping

occurs

more

easily.

e@

When

gain

adjustment

is

off,

the

symptoms

below

appear.

os

[ee

eThe

time

until

music

starts

becomes

longer

for

HM

-%PD

on

automatic

selection.

low low

or

high

(Kd

,

PP!

buttons

pressed.)

(Nor-

mally

takes

about

2

seconds.)

eMusic

docs

not

start

and

disc

continues

to

rotate

for

H

+>

or

iow

automatic

selection.

(Kd,

PPI

buttons

pressed.)

eSound

is

interrupted

during

PLAY.

Or

time

counter

display

low

e

More

poise

during

2-axis

device

hish

hich

operation.

. 7

stops

progressing.

The

following

is

a

simple

adjustment

method.

—Simple

Adjustment—

Note

:

Since

exact

adjustmeunt

cannot

be

performed,

remember

the

positions

of

the

controls

before

perfor-

ming

the

adjustment.

If

the

positions

after

the

simple

adjustment

are

only

a

little

different,

return

the

con-

trols

to

the

original

position.

oscilloscope

(DC

range)

CD

main

board

oon

O

|

Procedure

:

{

TP

(TE)

Om-

-7

TP

(VREF)

1.

Keep

the

set

horizontal.

If

the

set

not

horizontal,

this

adjustment

cannot

be

performed

due

to

the

gravity

against

the

2

axis

device.

Put

the

set

into

test

mode.

Connect

oscilloscope

to

CD

main

board

TP

(FE).

Insert

disc

(YEDS-18)

and

press

>

button.

Adjustment

RV703

so

that

the

waveform

is

as

shown

in

the

figure

below.

(focus

gain

adjustment)

Sa

Cont

VOLT/DIV:

100mV

TIME/DIV:

2mS

100mV

Ky

AY"

oe

OV

e

Incorrent

Examples

(DC

level

changes

more

than

on

adjust-

ed

waveform)

low

focus

gain

TIME/DIV:

2mS

250mV

high

focus

gain

TIME/DIV:

2mS

100mv

75mvV

OV

VOLT/DIV:

100mvV

VOLT/DIV:

100mv

6.

Connect

oscilloscope

to

TP

(TE).

7.

Adjust

RV704

so

that

the

waveform

is

as

shown

in

the

figure

below.

(tracking

gain

adjustment)

8.

Release

test

mode

after

adjustment

is

completed.

VOLT/DIV:

1V

TIME/DIV:

2mS

OV

®

Incorrect

Examples

(fundamental

wave

appears)

low

tracking

gain

VOLT/DIV:

1V

TIME/DIV:

2mS

OV

high

tracking

gain

.

(higher

fundamental

wave

than

for

low

gain)

VOLT/DIV:

1V

TIME/DIV:

2mS