Sony CDP-70 Manuale utente

SERVICE

MANUAL

US

Model

Canadian

Model

AEP

Model

UK

Model

E

Model

SPECIFICATIONS

Output

level

2

V

(at

50

kiloohms)

Load

impedance

over

10

kiloohms

Compact

disc

player

Compact

disc

digital

audio

system

Laser

output

Max.

44.6

pW"

*

This

output

is

the

value

measured

at

a

distance

of

about

200

mm

from

the

Pick-up

Block.

Frequency

response

|

2Hz-

20,000

Hz

(+0.3

dB)

Signal-to-noise

ratio

{|More

than

102

dB

Channel

separation

More

than

98

dB

(1kHz)

Outputs

LINE

OUT

(phono

jacks)

DIGITAL

OUT

(OPTICAL)

|

Wave

fength

660

nm

(optical

output

connector)

|

Output

level

-

18

dBm

HEADPHONES

Output

level

max.

15

mW

(stereo

phono

jack)

Load

Impedance

32

ohms

Dimensions

(approx.)

Laser

Semiconductor

laser

(A

=

780

nm)

Emission

duration:

continuous

objective

lens

surface

on

the

Optical

Dynamic

range

More

than

95

dB

Harmonic

distortion

Less

than

0.003%

(1kHz)

(Fixed)

General

(w/h/d)

120

V

AC,

60Hz

430

x

95

x

275

mm

(17

x

3%

x

10%

inches)

including

projecting

parts

and

controls

Weight

(approx.,

net)

|3.5

kg

(7

Ibs

11

02)

MICROFILM

Model

Name

Using

Similar

Mechanism)

CDP-208ESD

CD

Transport

Mechanism

Type

KSS-150A(RP)

Optical

Pick-Up

Block

Type

BU-5C

Supplied

accessories

Audio

signal

connecting

cord

1

(2

phono

plugs

-

2

phono

plugs)

Remote

commander

|

tT

Sony

SUM-3

(NS)

batteries

Remote

commander

Remote

control

Infrared

control

system

3

V

DC

with

two

size

AA

(Ré)

batteries

67

x

20

Xx

175

mm

(w/h/d)

(2%

x

13/16

X

7

inches)

Weight

135

g

(5

oz)

including

batteries

Design

and

specifications

subject

to

change

without

notice.

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

BY

MARK

A

OR

DOTTED

LINE

WITH

MARK

A

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.

COMPACT

DISC

PLAYER

SONY.

Pe

Ree

Te

ee

ae

ee

~

CDP-770

|

TABLE

OF

CONTENTS

Section

Title

SECTION

1

GENERAL

1-1.

Location

of

Controls

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

220

e

eens

SECTION

2

ELECTRICAL

ADJUSTMENTS

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

SECTION

3

DIAGRAMS

3-1.

Semiconductor

Lead

Layouts

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

3-2.

Printed

wiring

Boards.................-02.

eee

3-3.

Schematic

Diagram

...........

0...

c

cess

eee eee

SAFETY

CHECK-OUT

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-S40A._

Follow

the

manufacturers’

instructions

to

use

these

instru-

ments.

to

A

battery-operated

AC

milliammeter.

The

Data

Precision

245

digital

multimeter

is

suitable

for

this

job.

e

iy

Section

Title

3-4.

Explanation

of

IC601

(MSC6458-36SS)

..........

3-4-1...

Pin:

Descriptions

biases

iG

ee

dias

ogee

ee

3-5.

IC

Block

Diagrams

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

0.

cece

eee

SECTION

4

EXPLODED

VIEWS

A-\:.

Main

Block

ics

csa3

cae

een

es

Cte

Pad

MAAS

4-2.

Optical

Pick-Up

Block

..................0.000.

11

|

SECTION

5

ELECTRICAL

PARTS

LIST

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

3.

Measuring

the

voltage

drop

across

a

resistor

by

means

of

a

VOM

or

battery-operated

AC

volt-

meter.

The

“‘limit”

indication

is

0.75

V,

so

analog

meters

must

have

an

accurate

low-

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)

0.15uF

T

1.542

=

Earth

Ground

Fig.

A.

Using

an

AC

voltmeter

to

check

AC

leakage.

SERVICING

NOTE

NOTES

ON

HANDLING

THE

OPTICAL

PICK-

UP

BLOCK

OR

BASE

UNIT

The

laser

diode

in

the

optical

pick-up

block

may

suffer

electrostatic

breakdown

because

of

the

poten-

tial

difference

generated

by

the

charged

electrostatic

load,

etc.

on

clothing

and

the

human

body.

During

repair,

pay

attention

to

electrostatic

break-

down

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.

CAUTION

Use

of

controls

or

adjustments

or

performance

of

procedures

other

than

those

specified

herein

may

result

in

hazardous

radiation

exposure.

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

check-

ing

the

laser

diode

emission,

observe

from

more

than

30

cm

away

from

the

objective

lens.

—2—

|

CDP-770

SECTION

1

GENERAL

1-1.

LOCATION

OF

CONTROLS

Front

Panel

.

Remote

Commander

oe

GLEAR/REPEAT

(A<>B

clear/repeat)

button

20

<<>>

SLOW

(Low

i

speed

manual

search)

9

buttons

18}

A<->B

repeat

button

POWER

switch

re

This

indicates

a

function

available

Disc

compartment

only

on

the

main

unit.

hail

button

“|

This

indicates

a

function

available

EMOTE

sensor

E

only

on

the

remote

commander.

FADER

(FADE

IN/FADE

OUT)

button

EDIT/TIME

FADE

button

CHECK

(program

check)

button

CLEAR

(program

clear)

button

<<>>

(manual

search)

buttons

PROGRAM

or

PGM

button

SHUFFLE

button

Numeric

buttons

HEADPHONE

VOL

control

PHONES

jack

>

20

(over

20)

button

CONTINUE/SINGLE

button

k44

>i

(AMS*)

buttons

@

(stop)

button

Il

(pause)

button

P

(play)

button

&

(open/close)

button

AUTO

SPACE

button

TIME

button

SSPE

SeReNESOONoFAeNE)

*AMS

is

the

abbreviation

of

Automatic

Music

Sensor.

CDP-770

SECTION

2

ELECTRICAL

ADJUSTMENTS

1.

Perform

adjustments

in

the

order

given.

1.

Connect

oscilloscope

to

test

point

TP

(RF)

and

TP

(RFG),

2.

Use

YEDS-18

(Part

No:

3-702-101-01)

disc

unless

other-

2.

Turn

POWER

switch

on.

wise

indicated.

3.

Put

disc

(YEDS-18)

in

and

press

DP

button.

3.

Use

the

oscilloscope

with

more

than

10

MQ

impedance.

4.

Adjust

RV102

for

an

optimum

waveform

eye

pattern

or

so

that

the

peak

is

maximum.

Optimum

eye

pattern

means

RF

PLL

Frequency

Adjustment/Lock

Frequency

Check

that

shape

“©”

can

be

clearly

distinguished

at

the

center

Procedure

:

of

the

waveform.

frequency

counter

RF

signal

waveform

main

board

\

KAKA

|

ee

pe

ANY

a

XA

.

Connect

test

point

TP

(ASY)

to

ground

with

lead

wire.

XXX

AA

2.

Tum

POWER

switch

on.

NUN

3.

Connect

the

frequency

counter

to

test

point

TP

(PCK)

pene

a

and

TP

(AG).

reo

wr

4.

Adjust

RV201

so

that

the

reading

on

the

frequency

counter

is

43218MHz+30kHz.....

(RF

PLL

frequency

adjustment).

5.

Remove

lead

wire

connecting

TP

(ASY)

to

ground.

Adjustment

Location:

main

board

6.

Put

disc

(YEDS-18)

in

and

press

>

button.

7.

Confirm

that

the

reading

on

frequency

counter

is

4.3218MHz.....

(Lock

frequency

check).

E-F

Balance

Adjustment

eee

:

EF

TEO

This

adjustment

should

be

made

when

replacing

TOP

(T

eatance

{

TE!

type

Optical

Pick-up).

ADJ

RV101

Procedure

:

oscilloscope

(DC

range)

it

FOCUS

RF

BIAS

RFG

AG

RF

PLL

ADJ

\RV102

PCK

FREQUENCY

,

ADJ/LOCK

‘d

main

boar

ere

FREQUENCY

TP

(TEO)

Om———-O

+

CHECK

TP

(AG)

Om—_——-0

~

1.

Connect

test

point

TP

(ADJ)

and

test

point

TP

(TEI)

to

ground

with

lead

wire.

Connect

oscilloscope

to

test

point

TP

(TEO)

and

TP

(AG).

Turn

POWER

switch

on.

Put

disc

(YEDS-18)

in

and

press

>

button.

Adjust

RV101

so

that

the

traverse

waveform

is

symmetri-

cal

above

and

below.

6.

After

adjustment,

remove

the

lead

wire

connected

in

step

5.

VF

wp

A=B

A

(within

5%)

Bg

VOLT/DIV:

IV

TIME

/DIV:

Ims

Focus

Bias

Adjustment

This

adjustment

should

be

made

when

replacing

TOP

(T-

type

Optical

Pick-up).

Procedure:

oscilloscope

(DC

range)

main

board

Cc

a

TP

(RF)

O«———O

+

TP

(RFG)O—m——_—oO

—

REFERENCE

1.

Focus/Tracking

Gain

Adjustments

A

frequency

responce

analyzer

is

necessary

in

order

to

perform

this

adjustment

exactly.

However,

this

gain

has

a

margin,

so

even

if

it

is

slightly

off,

2,

there

is

no

problem.

Therefore,

do

not

perform

this

adjust-

ment.

3.

Focus/tracking

gain

determines

the

pick-up

follow

up

(verti-

4.

cal

and

horizontal)

relative

to

mechanical

noise

and

shock

when

the

2-axis

device

operate.

:

However,

as

these

reciprocate,

the

adjustment

is

at

the

point

where

both

are

satisfied.

@

When

gain

is

raised,

the

noise

when

the

2-axis

device

oper-

ates

increases.

@When

gain

is

lowered,

mechanical

shock

and

skipping

occurs

more

easily.

@

When

gain

adjustment

is

off,

the

symptoms

below

appear.

Symptoms

Tracking

eThe

time

until

music

starts

becomes

longer

for

@

—

D

or

automatic

é

l

.

ed

selection.

(Kid,

DD

but-

Onion.

teh

tons

pressed.)

(Normally

takes

about

1

seconds.)

@

Music

does

not

start

and

disc

continues

to

rotate

for

@

—

DP

or

automatic

selection.

(Ki<J,

DEI

buttons

pressed.)

@Disc

table

opens

shortly

after

aS

be.

low

or

high

Sound

is

interrupted

dur-

ing

PLAY

or

time

counter

display

stops

progressing.

®

More

noise

during

2-axis

device

operation.

The

following

is

a

simple

adjustment

method.

—Primary

Adjustment

—

Note

:

Since

exact

adjustment

cannot

be

performed,

remem-

ber

the

positions

of

the

controls

before

performing

the

adjustment.

If

the

position

after

the

primary

adjust-

ment

are

only

a

little

different,

return

the

controls

to

the

original

position.

Procedure

:

oscilloscope

(DC

range)

main

board

C)

TP

(FEO)

soar

emea

+

|

TP

(TEO)

O=e-

-7

|

O-

Keep

the

set

horizontal.

If

the

set

is

not

horizontal,

this

adjustment

cannot

be

performed

due

to

the

gravity

against

the

2-axis

device.

Insert

disc

(YEDS-18:

Fifth

Selection)

and

press

>

but-

ton.

Connect

oscilloscope

to

main

board

TP

(FEO).

Adjust

RV103

so

that

the

waveform

is

as

shown

in

the

figure

below.

(focus

gain

adjustment)

Connect

oscilloscope

to

main

board

TP

(TEO).

Adjust

RV104

so

that

the

waveform

is

as

shown

in

the

figure

below.

(tracking

gain

adjustment)

VOLT

/DIV

:

100mV

TIME

/DIV

:

2mS

100mV

ov

@

Incorrent

Examples

(DC

level

changes

more

than

on

adjust-

waveform)

low

focus

gain

VOLT/DIV:

100mV

TIME

/DIV

:

2mS

250mV

ov

high

focus

gain

VOLT/DIV:

100mV

TIME/DIV

:

2mS

100mV

75mV

OV

ov

@

Incorrect

Examples

(fundamental

wave

appears)

low

tracking

gain

TIME

/DIV

ov

high

tracking

gain

higher

fundamental

wave

than

for

low

gain)

ov

Adjustment

Location

:

main

board

VOLT

/DIV:

TIME

/DIV

:

VOLT/DIV

:

VOLT/DIV

:

TIME

/DIV

:

Iv

2ms

lV

:

2ms

IV

2ms

VOLT/DIV:

IV

TIME

/DIV

:

2mS

ov

Incorrect

Examples

(fundamental

wave

appears)

low

tracking

gain

VOLT/DIV:

IV

TIME

/DIV

:

2mS

OV

high

tracking

gain

higher

fundamental

wave

than

for

low

gain)

VOLT/DIV:

1V

TIME

/DIV

:

2mS

ov

Adjustment

Location:

main

board

FEO

FOCUS

rvio3

{

GAIN

ADJ

Feat

TRACKING

TEO

L.-.

Gan

RV104

ADJ

SECTION

3

DIAGRAMS

3-1.

SEMICONDUCTOR

LEAD

LAYOUTS

CXA1081S

GP1F31T

M5231TL

vr3ses

CXA1082BS

GP1U52

M5294P

PCMS56P-S

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12345678

(Top

view)

CXA1291P

LC9600P-144

NJM4556S

t234se7as

MSC6458-36SS

CXD1125Q

DTA144ES

DTC114ES

DTC143TS

DTC144ES

(Top

view)

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CxD2550P

M5218P

DTC114EF

M74HC6004P

1g 10

=

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~

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;

(Top

view)

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(Top

view)

2

\

CDP-770

BR4361F

™~

cathode

anode

HZS9B2L

RD5.1ESB2

18$132

cathode

anode

US1060M

10E2

cathode

anode

e@

Semicouductor

Location

[rete

[boston]

@

oO——:

parts

extracted

from

the

component

side.

e

:

Jumper

wire

connected

to

the

ground

pattern

on

the

component

side.

3-2.

PRINTED

WIRING

BOARDS

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