Sony CDP-791 User manual

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CDP-791/X111ES

SERVICE

MANUAL

SPECIFICATIONS

Compact

disc

player

Frequency

response

Signal-to-notse

ratio

Dynamic

range

Harmonic

distortion

Channel

separation

Outputs

LINE

OUT

(FIXED)

(phono

jacks)

LINE

OUT

(VARIABLE)

(phono

jacks)

DIGITAL

OUT

(OPTICAL)

(optical

output

connector)

PHONES

(stereo

phone

jack)

General

Power

requirements

MICROFILM

2 Hz

-

20

kHz

+

0.5dB

More

than

108

dB

More

than

98

dB

Less

than

0.0027%

More

than

100

dB

Output

level

2

V

(at

50

kilohms)

Load

impedance

over

10

kilohms

Output

level

max.

2

V

(at

50

kilohms)

Load

impedance

over

50

kilohms

Wave

length

660

nm

Output

fevel

—

18

dBm

Output

level

max.

10

mW

Load

impedance

32

ohms

US,

Canadian

Modei:

120

V

AC,

60

Hz

AEP

Model:

220

V

—

230

V

AC,

50/60

Hz

UK

Model:

240

V

AC,

50

Hz

US

Model

Canadian

Model

CDP-X111ES

AEP

Model

UK

Model

CDP-791

Photo:

CDP-791

Model

Name

Using

Similar

Mechanism

|

CDP-291/391

CDM14-5BD1

Optcal

Pick-Up

Block

Type

BU-5BD1

CD

Mechanism

Type

Power

consumption.

12W

Dimensions

{approx.,

430110280

mm

(w/h/d)

including

projections)

(1747/4

11'/e

inches)

Weight

(approx.)

4.0

kg

(8

Ibs

14

07)

Supplied

accessories

Audio

cord

1

(2

phono

plugs

-

2

phono

plugs)

Remote

commander

1

R6

(AA)

batteries

2

Remote

commander

RM-D791

Remote

control

sysiem

Infrared

contro!

Power

requirements

3

VDC

with

two

R6

(size

AA)

batteries

Dimensions

Approx.

62

X

20

X

175

mm

(w/h/d)

(1°/5X

°/i6X

7

inches)

Weight

Approx.

130

g

(4.6

02)

Including

batteries

Design

and

specifications

subject

to

change

without

notice.

COMPACT

DISC

PLAYER

SONY.

CDP-791/X111ES

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-540A.

Follow

the

manufacturers’

instructions

to

use

these

instru-

ments.

2.

<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-

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

muitimeters

that

have

a

2V

AC

range

are

suitable.

(See

Fig.

A)

To

Exposed

Metal

Parts

on

Set

AC

voltmeter

aie

(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

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.

|

|

MODEL

IDENTIFICATION

i-)

i

CDP-791

—Model

Number

Label—

CDP-X111ES

MODEL

NO.WYyyy7Z

SERIAL

No.

MMMM

MADE

IN

JAPAN

MADE

IN

FRANCE

US

Model:

=

AC120V

60Hz12W

Canadian

Model:

AC:

120V

60

Hz

12W

_

AEP

Model:

=.

AC220

—

230V,

50/60Hz

UK

Model:

AC240V~50/

60Hz

TABLE

OF

CONTENTS

Section

Title

Page

Specifications

wt

Te

ve

ere

eee

eee

ee

ee

ee

ee ee

ee

1

Safety

Check-out

Cee

ee

emcee

seer

enseseeeeenusenen

2

Model

Identification

«reece

s

reece

versace

cccenvece

2

1.

GENERAL

Notes

on

Handling

the

Optical

Pick-up

Block

or

Base

Unit

--es

sec

c

reeset

cece

nenes

3

Notes

on

Laser

Diode

Emission

Check

---:--:

3

Location

of

Controls

CTCL

ere

ee

eee

ee

re

a

ee

3

Adjusting

Operating

Voltage

--:---+++++++++>

3

2.

DISASSEMBLY

Teor

eT

ee

Tee

ee

|

4

3.

ELECTRICAL

BLOCK

CHECKING

S

Curve

Check

ee

ree

ee

eae

ee

Et

enneaw

ie

5

RF

Level

Check

--crcsccccrcerceecnecccens

5

E-F

Balance

Check

Cece

eee

w

ere

nen

seas

aneve

5

RF

PLL

Free-run

Frequency

Check

---++--::>

6

Focus/T

racking

Gain

ee

ee

ee

ee

ee

ee

ee

6

4.

DIAGRAMS

1C101(CXA1372Q)PIN

DESCRIPTIONS

-::+

7

4-],

.

Block

Diagram

gee

wa

eee

8

-le'ee

ae eb

eee

&

ete

wl

ecere

8

4-2.

Printed

Wiring

Boards

cee

een

ere

em

eee

en

eeene

12

4-3,

Schematic

Diagram

a

ee

1S

5.

EXPLODED

VIEWS

et

Skea

ents

ee

ew

eae

21

6.

ELECTRICAL

PARTS

LIST

----::-:----:

24

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.

CDP-791/X111ES

NOTES

ON

HANDLING

THE

OPTICAL

PICK-UP

For

UK

Model

and

AEP

Model

BLOCK

OR

BASE

UNIT

The

laser

diode

in

the

optical

pick-up

block

may

suffer

CLASS

1

LASER

PRODUCT

electrostatic

breakdown

because

of

the

potential

di-

ee

Dp

KLASS

1

LASERAPPARAT

ference

generated

by

the

charged

electrostatic

load,

etc.

on

clothing

and

the

human

body.

During

repair,

pay

attention

to

electrostatic

break-

This

Compact

Disc

player

is

classified

as

a

CLASS

1

LASER

product.

down

and

also

use

the

procedure

in

the

printed

matter

The

CLASS

4

LASER

PRODUCT

label

is

located

which

is

included

in

the

repair

parts.

on

the

rear

exterior.

The

flexible

board

is

easily

damaged

and

should

be

ee

—

hadicdwithGare-

PNohTUL)

Cale

m

Ql

elec

Liem

gedit

lets

For

the

customers

of

the

model

equipped

NOTES

ON

LASER

DIODE

EMISSION

CHECK

|

with

the

voltage

Sieie:

|

ee

The

laser

beam

on

this

model

is

concentrated

so as

to

Check

that

the

voltage

selector

is

set

to

the

be

focused

on

the

disc

reflective

surface

by

the

objec-

loca!

power

line

voltage.

If

not,

set

the

selector

tive

lens

in

the

optical

pick-up.

block.

Therefore,

when

to

the

correct

position

before

connecting

AC

checking

the

laser

diode

emission,

observe

from

more

Power

corcite:dwallOuNel

than

30cm

away

from

the

objective

lens.

110-120'V

220-240

V

Ge

ae

mien

SECTION

1

instruction

manual.

GENERAL

This

section

is

extracted

from

Location

of

Controls

Front

Panel

ae

LZ]

3.5

4.54

6°

rn

calurfusfan

yes

if

a

oa

enter

Se

et

Ee

2B}

27!

26

(25,

24)

123.22

2117

201.19'

1817;

1615.

POWER

switch

@

[16]

PHONES

jack

Disc

tray

®

MUSIC

SCAN

button

@

&

OPEN/CLOSE

bulton

©

(18)

<<»

(manual

search)

buttons

@,

@

[4]

PEAK

SEARCH

button

@

[191

FADER

button

@ @

CONTINUE

button

and

indicator

©.

@.

@.

@.

@

(20)

<4

BPE

(AMS’*)

bulions

@.

@

(6

}

SHUFFLE

button

and

indicator

@

TIME

button

©

PROGRAM

button

and

indicator

@,

©

(22|

A.

SPACE

(auto

space)/A.

CUE(auto

cue)

bution

and

auto

cue

TIME

SET

button

@,

@

indicator

@,

@

[9

|

EDIT/TIME

FADE

button

©,

®

(23]

@

(stop)

button

&@

Numeric

buttons

@

EU

(pause)

button

@

[41]

REPEAT

button

©

[251

&

(play)

button

@

42}

>20

(over

20)

button

@

{26|

Display

window

[13}

CHECK

(program

check)

button

@,

@

[27]

TIMER

switch

©

CLEAR

(program

clear)

button

©, @.

@

[28!}

Remote

sensor

@

[15]

LINE

OUT/PHONE

LEVEL

control

@&

—~—3—

CDP-791/X11T1ES

|

atztarelc=meote)nilaet-ale\s)

a

ae

“2;

(1)

&

OPEN/CLOSE

button

®

=

{2

|

SHUFFLE

button

@

ee

|

3]

PROGRAM

button

©.

@

[4]

M.SCAN

(music

scan)

button

®

LS]

Numeric

buttons

@

sj

{6}

CLEAR

(program

clear)

button

@.

@.

@

6!

N

f

'

i

i

?_}

CHECK

button

@,

®

[8

}

A

<—

B

repeat

button

@

ae

1.9]

A.SPACE

(auto

space)/A.CUE

(auto

cue)

button

@,

@

8!

'10]

FADER

button

@,

@

‘11]

@

(stop)

button

@

9

[12]

LINE

OUT

LEVEL

+/

--

(line

out/headphone

volume)

10:

buttons

@

|

113]

<<

BE

SLOW

(low

speed

manual

search)

buttons

@

-E!

[14]

<<

BP

(manual

search)

buttons

@.

@

ig:

15]

4—

—&

INDEX

buttons

@

AWS:

13}

[16]

<4

BE

AMS

buttons

@,

@

1G

erenetmer

,

[17]

88

(pause)

button

@

|

ey

a

.

iO

{O

ee

rea)

6/8

A[8/

aA

By

rer

|

SrA

re]

119]

CLEAR/REPEAT

(A

<>

B

repeat

clear/repeat)

button

@

'20]

TIME

button

@

[21]

20

(over

20)

button

@

[22]

CONTINUE

button

@,

@. @.

@

®

SECTION

2

DISASSEMBLY

BASE

UNIT

REMOVAL

Note:

Follow

the

disassembly

procedure

in

the

numerical

order

given.

i,

Remove

CD

mechanism

from

the

set

and

turn

over.

2,

Turn

the

cam

@inthe

Arrow

@

direction

by

the

O

driver.

3.

Take

out

disc

table

Qa.

4

5

Base

Unit

.

Remove

bracket

yoke

©.

BU-5BD1

.

Remove

BU-5BD1

@

in

the

Arrow

©

direction.

disc

table

@

—4—

SECTION

3

ELECTRICAL

BLOCK

CHECKING

Note:

1.

CD

Block

basically

constructed

to

operate

with-

out

adjustment.

Therefore,

check

each

item

in

order

given.

2.

Use

YEDS-18

disc

(3-702-101-01)

unless

otherwise

indicated.

3.

Use

the

oscilloscope

with

more

than

10MS2

im-

pedance.

4.

Clean

an

object

lens

by

an

applicator

with

neutral

detergent

when

the

signal

level

is

low

than

specified

value

with

the

following

checks.

S

Curve

Check

_

oscilloscope

BD

board

TP

(FEO)

omw—o}

TP(vC)

ow—to-

Procedure

:

1.

Connect

oscilloscope

to

test

point

TP

(FEO)

on

BD

board.

2.

Connect

between

test

point

TP

(FES)

and

TP

(VC)

by

lead

wire.

3.

Turned

Power

switch

on

and

actuate

the

focus

serch.

(actuate

the

focus

serch

when

disc

table

is

moving

in

and

out.)

4.

Check

the

oscilloscope

waveform

(S

curve)

is

symmetrical

between

A

and

B.

And

confirm

peak

to

peak

level

within

3+1Vp-p.

S

curve

waveform

symmetry

/]

as

+

within

3£1Vp-p

5.

After

check,

remove

the

lead

wire

connected

in

step

2.

Note:

«

Try

to

mesure

several

times

to

make

sure

that

the

ratio

of

A:

B

or

B:A

is

more

than

10:

7.

*

Take

sweep

time

as

long

as

possible

and

light

up

the

brightness

to

obtain

best

waveform.

RF

Level

Check

oscilloscope

a

TP

(RF)

O=t———o+

TP

(Vc)

omw—tlo-

BD

board

Procedure

:

1.

Connect

oscilloscope

to

test

point

TP

(RF)

on

BD

board.

2.

Turn

Power

switch

on.

Put

dise

(YEDS-18)

in

and

playback.

4.

Confirm

that

oscilloscope

waveform

is

clear

and

check

RF

signal

level

is

correct

or

not.

Note:

|

_

Clear

RF

signal

waveform

means

that

the

shape

“©”

can

be

clearly

distinguished

at

the

center

of

the

wave-

form.

VOLT/DIV

:

200mV

TIME/DIV.

:

500nS

\AAAAAAAAAAA)

\

i

a

WIN

|

2402

vp

AANA

ii

me

RF

signal

waveform

r

E-F

Balance

Check

oscilloscope

BD

board

|

eR.

TP

(TEO)

Ow—o}

TP(vc)

ow—lo-

Procedure

:

1.

Connect

test

point

TP

(ADJ)

to

ground

and

TP

(TES)

to

TP

(VC)

with

lead

wire.

2.

Connect

oscilloscope

to

test

point

TP

(TEO)

on

BD

board.

3.

Turn

Power

switch

on.

4.

Put

disc

(YEDS-18)

in

and

playback.

Confirm

that

the

osilloscope

waveform

is

sym-

metrical

on

the

top

and

bottom

in

relation

to

OV,

and

check

this

level.

Traverse

oscilloscope

symmetry

level:

2+1Vp-p

6.

Remove

the

lead

wire

connected

in

step

1.

CDP-791/X1TT1ES

CDP-791/X111ES

RF

PLL

Free-run

Frequency

Check

Adjustment

Locations

:

Procedure

:

{BD

board)

1.

Connect

frequency

counter

to

test

point

(PCIC)

with

lead

wire.

~—

conductor

side

—

Main

board

frequency

counter

Fi

omar

|

TP

(PCK)

oe:

2.

Turn

Power

switch

on.

3.

Confirm

that

reading

on

frequency

counter

is

4,

3218MHz.

Focus/Tracking

Gain

This

gain

has

a

margin,

so

even

if it is

slightly

off.

There

is

no

problem.

Therefore,

do

not

perform,

this

adjustment.

Please

note

that

it

should

be

fixed

to

mechanical

cen-

ter

position

when

you

moved

and

do

not

know

original

position.

(Main

board)

=

Component

Side

—

[C101

(CXA1372Q)

PIN

DESCRIPTIONS

PIN

NO.

PIN

NAME

FUNCTION

|

—

ge

=~

Beorran

sg

wn

—

tt

te

on

&

Ww

Nh

VC

FGD

FS3

FLB

FEO

FE=

SRCH

TGU

TG2

AV

CC

TAO

TAS

SL+

SLO

2L=

FSET

ISET

SSTOP

AV

EE

DIRC

LOCK

CLK

XLT

DATA

SENS

XRST

C,

OUT

D

GND

MIRR

DFCT

ASY

EFM

FOK

CC2

CCl

DV

CC

CB

CP

RFI

RFO

DV

EE

TZC

TE

TDFCT

ATSC

FZC

FE

FDFCT

Ne

a

OD

oe

es

O-

CO

mm

et

em

OoO-

00-900

—Ps

Ft

ee

ke

OO

OE

SECTION

4

DIAGRAMS

2.5

Volts

power

supply.

Focus

gain

adjusting

capacitor

connected

between

@

pin

and

@

pin.

Focus

gain

adjusting

capacitor

connected

between

@

pin

and

@

pin.

Focus

Servo

low

frequency

boost-up

capacitor

connected,

Focus

drive

output.

Focus

error

amp

inverted

input,

Connected

capacitor

to

making

the

focus

serch

waveform,

Tracking

gain

adjusting

capacitor

connected

between

pin

and

@)

pin.

Tracking

gain

adjusting

capacitor

connected

between

pin

and

©)

pin.

+5

Volts

power

supply.

Tracking

drive

output.

Tracking

amp

inverted

input,

Sfed

amp

non-inverted

input.

Sled

drive

output.

Sled

amp

non-inverted

input,

Phase

stabilizer

setting

resistor

connected,

Current

setting

resistor

connected.

Limit

switch

connection

port,

Ground

(OV),

Direct

control

port,

Non-connected,

Sled

free-run

protection

is

operate

at

“L”.

Serial

data

transmission

clock

input

form

digital

signal

processor,

Latch

input

from

digital

signal

processor,

Serial

input

from

digital

signal

processor.

Outputs

internal

state

corresponding

to

address.

System

reset

input.

Reset

at

“L”,

Tracking

counter

output,

Digitel

ground,

Grounded

Mirror

output

digital

signal

processor.

Deffect

output.

Deffect

at

“H”",

Auto

symmetry

control

input.

EFM

Comparator

output,

Focus

OK,

Deffect

bottom

hold

input.

Deffect

bottom

hold

output.

+5

Volts

power

supply,

Deffect

bottom

hold

capacitor

connected.

Mirror

hold

capacitor

connected,

RF

Signal

input

(Capacitance

coupled).

RF

Signal

input

(Direct

Coupled),

Grounded

(OV).

Tracking

Zero-cross

comparator

input,

Tracking

error

amp

input.

Deffect

correction

hold

capacitor

connected,

Anti-shock

input.

Focus

Zero-cross

comparator

input,

Focus

error

input,

Deffect

correction

hold

capacitor

connected,

e

Circuit

Boards

Location

OPTICAL

PICK

UP

BOARD

POWER

SWITCH

BOARD

eS

KEY

BOARD

DISPLEY

BOARD

e

Semiconductor

Location

Note:

®

O——

:

parts

extracted

from

the

component

side.

6

|

:

parts

mounted

on

the

conductor

side.

BD

BOARD

MAIN

BOARD

ya

——=—

MOTOR

(VR)

BOARD

eHP

BOARD

e

IC

Block

Diagram

1C301

IC101

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(35)

(3)

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2)

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(25)

COMPARATOR

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BUFFER

DATA

cB

(37)

AUTO

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5}

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5)

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cP

(38)

AMP

LL?

CLK

4

i.

RFI

(39)

VtL

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RFO

DFcY

8)

DIRC

COMPARATOR

(19)

AVEE

BVEE

(41)

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ae

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IC304

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(36)

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TEST!

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ORDER

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(41)

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SHAPER

NTERPOLATER

BCKI

pas

DLI

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la

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of

this

parts

list.

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remplacer

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par

une

(1)

CHASSIS

SECTION

>

16

piéce

portant

le

neméro

spécifié.

18

we

19

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not

supplied

&

#7

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=

=

J

Not

supplied

45

supplied

with

VR

supplied

with

J481

not

supplied