Sony CDP-790 Bedienungsanleitung

Compact

disc

player

Frequency

response

Signal

to

noise

ratio

Dynamic

range

Harmonic

distortion

Channel

separation

Outputs

LINE

OUT

(phono

jacks)

DIGITAL

OUT

(OPTICAL)

(optical

output

connector)

PHONES

(stereo

phone

jack)

General

Power

requirements

Power

consumption

Dimensions

(approx.,

including

projections)

Weight

(approx.)

US

Model

SPECIFICATIONS

2

Hz

-

20

kHz+0.3

dB

More

than

104

dB

More

than

97

dB

Less

than

0.003%

More

than

98

dB

Output

level

2

V

(at

50

kilohms)

Load

impedance

over

10

kilohms

Wave

length

660

nm

Output

level

—

18

dBm

Output

level

max.

15

mW

Load

impedance

32

ohms

120

V

AC,

60Hz

14W

430

X

110

X

280

mm

(w/h/d)

(17

X

49/.X

11'/s

inches)

3.8

kg

(8

lbs

70z)

Supplied

accessories

Audio

cord

1

(2

phono

plugs

-

2

phono

plugs)

Remote

commander

1

R6

(size

AA)

batteries

2

Remote

commander

(RM-D290)

Remote

control

system

infrared

control

Power

requirements

3

V

DC

with

two

R6

(size

AA)

batteries

Dimensions

Approx.

67

X

18

X

175

mm

(w/h/d)

(2°/4X

7/32

7

inches)

Weight

Approx.

150

g

(5.3

0z)

Including

batteries

Design

and

specifications

subject

to

change

without

notice.

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

BY

SHADING

AND

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

PUBLISHED

BY

SONY.

COMPACT

DISC

PLAYER

ONY.

CDP-790

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.

ie

A

commercial

leakage

tester,

such

as

the

Simpson

229

or

RCA

WT-540A.

Follow

the

manufacturers’

instructions

to

use

these

instru-

ments.

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

multimeters

that

have

a

2V

AC

range

are

suitable.

(See

Fig.

A)

To

Exposed

Metal

Parts

on

Set

AC

voltmeter

a

(0.75

V)

=

Earth

Ground

Using

an

AC

voltmeter

to

check

AC

leakage.

POP

OPO

DOPED

ODL

EDEL

DOP

OPED

ODED

OPED

EPD

OL

OLE

OOD

A

DEE

ERED

ELROD

ODED

EL

ODODE

EMO

OLED

ROEDER

OOOO

OP

OEE

OME

DOO:

This

set

employs

a

laser.

Therefore,

be

sure

to

follow

carefully

the

instructions

below

when

servicing.

CAUTION

Use

of

controls

or

adjustments

or

performance

of

procedures

other

than

those

specified

herein

may

result

in

hazardous

radiation

exposure.

PROTECTION

OF

EYES

FROM

LASER

BEAM

DURING

SERVICING

].

Laser

Diode

Properties

Material:

GaAlAs

Wavelength:

780

mm

Emission

Duration:

continuous

Laser

Output

Power:

less

than

44.6

uW*

*

This

output

is

the

value

measured

at

a

distance

of

200

mm

from

the

objective

lens

surface

on

the

Optical

Pick-up

Block.

2.

During

service,

do

not

take

the

Optical

Pick-up

Block

apart,

and

do

not

adjust

the

APC

circuit.

If

there

is

a

breakdown

in

the

APC

circuit

(including

laser

diode),

replace

the

entire

Optical

Pick-up

Block

(including

APC

board),

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.

|

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

from

more

than

30cm

away

from

the

objective

lens.

1-1.

LOCATION

OF

CONTROLS

Se

en

nen

NS

Is

SERENE

Ses

SR

SS

ee

POWER

switch

Disc

tray

TIME

button

Remote

sensor

PEAK

SEARCH

button

[6]

REPEAT

button

[7]

FADER

(FADE

IN/FADE

OUT)

button

[8]

CHECK

(program

check)

button

[9]

CLEAR

(program

clear)

button

MULTI

PGM

(multi-disc

program)

button

[41]

PROGRAM

button

[42]

SHUFFLE

button

[13]

CONTINUE

button

Remote

Commander

SECTION

1

GENERAL

(26)

(2)

[24]

See

ee

eS

[15]

Numeric

buttons

PHONE

LEVEL

control

PHONES

jack

EDIT/TIME

FADE

button

TIME

SET

button

>

20

(over

20)

button

<<

BPI

AMS")

buttons

<< >>

(manual

search)

buttons

lM

(stop)

button

Ill

(pause)

button

B

(play)

button

[25]

Display

window

[26]

4

(open/close)

button

*

AMS

is

an

abbreviation

of

Automatic

Music

Sensor.

[1]

4

(open/close)

button

[2]

SHUFFLE

button

[3]

PGM

(program)

button

Numeric

buttons

[5]

AUTO

SPACE

button

[6]

<4

IAMS

buttons

[7]

tem

=m

INDEX

buttons

[8]

<<

BY

(manual

search)

buttons

[9

]

<<

B®

SLOW

(iow

speed

manual

search)

buttons

[10]

FADER

(FADE

IN/FADE

OUT)

button

A

<>

B

repeat

button

[42]

™

(stop)

button

[43]

BE

(pause)

button

BP

(play)

button

CLEAR/REPEAT

(A

<>

B

repeat

clear/repeat)

button

>

20

(over

20)

button

CONTINUE

button

SECTION

2

ELECTRICAL

ADJUSTMENT

1.

Perform

adjustments

in

the

order

given.

2.

Use

YEDS-18

disc

(3-702-101-1)

unless

otherwise

indicat-

ed.

3.

Use

the

oscilloscope

with

more

than

10MQ

impedance.

RF

Level

Check

Procedure:

oscilloscope

(DC

range)

BD

board

—$—<<<—.

TP

(RF)

o

TP

(VC)

06

1.

Connect

oscilloscope

to

test

point

TP

(RF)

and

TP

(VC)

on

BD

board.

2.

Turn

POWER

switch

on.

Put

disc

(YEDS-18)

in

and

play

back.

4.

Confirm

that

RF

level

and

eye

pattern

is

optimum.

Oputimum

eye

pattern

means

that

shape

“©”

can

be

clearly

distinguished

at

the

center

of

the

wave

form.

ed

VOLT/DIV

:

200mV

TIME/DIV

:

500nS

WAY

RF

signal

Reference

Waveform

(eye

pattern)

+09

wie

\

HN

wn

XXX

We

XN

XH

NYY

XX

WY

iM

AN)

mee

Wi

Procedure

:

A)

RF

leve

1.2+0.3Vp-p

oscilloscope

(DC

range)

BD

board

mcm,

TP

(TE

QO)

o

TP

(VC)

o

1.

Connect

test

point

TP

(ADJ)

and

TP

(TES)

to

ground

with

lead

wire.

2.

Connect

oscilloscope

to

test

point

TP

(TE

O)

and

TP

(VC)

on

BD

board.

3.

Turn

POWER

switch

on.

4,

Put

disc

(YEDS-18)

in

and

play

back.

5.

Confirm

that

the

oscilloscope

waveform

is

symmetrical

on

the

top

and

bottom

in

relation

to

0V.

6.

After

check,

remove

the

lead

wire

connected

in

step

1.

Note:

Take

sweep

time

as

long

as

possible

to

obtain

best

waveform.

RF

PLL

Free-run

Frequency

Check

Procedure:

a

counter

Main

an

ere

TP

(PCK)

a

1.

Turn

POWER

switch

on.

2.

Put

disc

(YEDS-18)

in

and

play

back.

3.

Confirm

that

reading

on

frequency

counter

is

4.3218M

Hz.

Focus/Tracking

Gain

Adjustment

A

frequency

responce

analyzer

is

necessary

in

order

to

perform

this

adjustment

exactly.

However,

this

gain

cas

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

the

point

where

both

are

satisfied.

*

When

gain

is

raised,

the

noise

when

the

2-axis

device

operates

increases.

*

When

gain

is

lowered,

mechanical

shock

and

skipping

occurs

more

easily.

*

When

gain

adjustment

is

off,

the

symptoms

below

appear.

low

or

high

Symptoms

*

The

time

until

music

starts

becmes

longer

for

STOP

~>

PLAY

or

automatic

selection.

(Kd,

PPI

buttons

pressed.)

(Normally

takes

about

1

sec-

onds.)

*

Music

does

not

start

and

disc

continues

to

rotate

for

STOP

—[>

PLAY

or

automatic

selec-

tion.

(Kd,

PPI

buttons

pressed.)

*Sound

is

interrupted

during

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,

remember

the

positions

of

the

controls

before

perfor-

ming

the

adjustment.

If

the

positions

after

the

primary

adjustment

are

only

a

little

different,

returs

the

controls

to

the

original

position.

oscilloscope

(DC

range)

BD

board

iene

TP

(FE

0)

TP

(TE

O)

oe’

TP

(VC)

|

CDP-790

Procedure

:

;

high

tracking

gain

1.

Keep

the

set

horizontal.

high

fandamential

wave

than

for

low

gain

If

the

set

is

not

horizontal,

this

adjustment

cannot

»)

eee

due

to

the

gravity

against

the

2-axis

device.

2.

Insert

disc

(YEDS-18)

and

press

>

PLAY

button.

3.

Connect

oscilloscope

to

TP

(FEO)

and

TP

(VC)

on

BD

board.

4.

Adjustment

RV101

on

BD

board

so

that

the

waveform

is

as

shown

in

the

figure

below.

(focus

gain

adjustment)

VOLT/DIV:

100mV

VOLT/DIV:

IV

TIME/DIV

:

2mS

—

OV

TIME/DIV:

2mS

Adjustment

Location:

(BD

board)

*

Incorrent

Examples

(DC

level

changes

more

than

on

adjust-

ed

waveform)

;

VOLT/DIV:

100mvV

low

focus

gain

TIME/DIV:

2mS

surat

Pale

ca

Te

SAL

iy

Me

BPR

So

json

be

VOLT/DIV:

100mV

high

focus

gain

TIME/DIV

:

2mS

{Main

board)

75mV

aes

Component

side

5.

Connect

oscilloscope

to

TP

(TEO)

and

TP

(VC)

on

BD

board.

6.

Adjust

RV102

on

BD

board

so

that

the

waveform

is

as

shown

the

flgure

below.

(tracking

gain

adjustment)

VOLT/DIV:

IV

TIME/DIV:

2mS

—

OV

*

Incorrect

Examples

(fundamentia

wave

appears)

low

tracking

gain

VOLT/DIV:

1V

TIME/DIV

:

2mS

—

0V

CDP-790

SECTION

3

DIAGRAMS

3-1,

SEMICONDUCTOR

‘eSemiconductor

Location

3-2:_PRINTED

WIRING

BOARDS

LEAD

LAYOUTS

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:

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Main

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sce:

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broroerrorsrred

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=

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:

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O—:

parts

extracted

from

the

component

side.

E-5

Se

e

@

=:

Through

hole.

E-5.

°

:

Pattern

on

the

side

which

is

seen.

F-3

e

:

Pattern

of

the

rear

side.

E-3

G-5

1-6

DTA114ES

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DTC114ES

LOAD

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DTC144ES

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Note:

e

e@

@ 6

@

Note:

The

components

identified

by

mark

A

or

dotted’

All

capacitors

are

in

uF

unless

otherwise

noted.

pF:

wuF

5O0WV

or

less

are

not

indicated

except

for

electrolytics

and

tantalums.

All

resistors

are

in

2

and

'/,W

or

less

unless

otherwise

specified.

line

with

mark

A

are

critical

for

safety.

Replace

only

with

part

number

specified.

:

B+

Line

:

B—

Line

|:

adjustment

for

repair.

Voltage

and

waveforms

are

dc

with

respect

to

ground

under

no-signal

conditions.

no

mark:

STOP

Voltages

are

taken

with

a

VOM

(Input

Impedance

10M

Q)

Voltage

variations

may

be

noted

due

to

normal

produc-

tion

tolerances.

Waveforms

are

taken

with

a

oscilloscope.

Voltage

variations

may

be

noted

due

to

normal

produc.

tion

tolerances.

Circled

numbers

refer

to

waveforms.

Signal

path.

>

:CD

Ze

:

digital

out

3-3.

SCHEMATIC

DIAGRAM

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

EDIT

TRACK

STEP

INDEX

MIN

DISC

SEC

46546090

1

ae

eae

ae

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oe

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Peet

bee

EEE

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ME

CONTINUE

REPEAT

1

PEAK

ee

L

1

MM

SHUFFLE

A-B

AUTO

SPACE

MM

PROGRAM

(MULT!)

dase

FOCUS/TRACK!NG

COIL

DRIVE,

SLED/SP

!

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MOTOR

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parts

of

an

assembled

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CHASSIS

BLOCK

4-1.

Part

No.

7-685-646-79

3-703-685-21

4-929-515-12

Description

SCREW

+BVTP

SCREW

(+BV

3X8)

PANEL

(FRONT)

4-908-848-01

EMBLEM,

SONY

*

4-929-557-01

CUSHION

(PANEL)

X-4922-927-1

PANEL

(SUB)

ASSY

4-929-528-01

ESCUTCHEON

(23)

7-685-645-79

SCREW

+BVTP

4-922-921-01

BUTTON

(POWER)

7-685~-134-19

4-929-529-01

4-929-521-11

*

4-922-524-01

CASE

PANEL,

LOADING

HOLDER

(LEFT)

*

4~922-523-01

HOLDER

(RIGHT)

4-929-531-01

BUTTON

(C)

A-4675-298-A

KNOB

(HP)

ASSY

7-682~-547-04

SCREW

+BVTT

3X6

(S)

*

4-929-561-01

CUSHION

(CASE)

7-682-548-09

SCREW

+BVTT

3X8

(S)

X-4885-950-1

FOOT

ASSY

*

4-929-513-21

PANEL,

BACK

3X8

TYPE2

N-S

3X6

TYPE2

N-S

SCREW

+BTP

2.6X8

TYPE2

N-S

SECTION

4

EXPLODED

VIEWS

@

Due

to

standardization,

parts

with

part

number

suffix

-XX

and

-X

may

be

dif-

ferent

from

the

parts

specified

in

the

components

used

on

the

set.

e@

Color

Indication

of

Appearance

Parts

Example:

(RED)

...KNOB,

BALANCE

(WHITE)

7

Cabinet's

Color

Parts

Color

Sak

904

lied

with

spies

BO

ae

RV

10

=

os

er

The

components

mark

or

dotted

tine

with

mark

A

are

critical

for

safety.

identified

by

Replace

only

with

part

number

specified.

J501

-—903

551

not

supplied

b+

—

Supplied

with

RV551

Remarks

RES,

VAR,

CARBON

20K/20K

(PHONE

LEVEL)

\

16

Remarks

Ref.No

Part

No.

Description

22

4-902-345-01

HEAT

SINK

23

*

3-703-244-00

BUSHING

(2104),

CORD

24

7-682-547-09

SCREW

+BVTT

3X6

(S)

25

4-886-821-11

SCREW,

S

TIGHT,

+PTTWH

3X6

26

3-704-366-31

SCREW

(CASE)

(M3X6)

27

4-929-522-01

PLATE,

INDICATION

28

4-929-527-01

BUTTON

(M/C)

29

4-923-836-11

CUSHION

901

*

1-632-491-11

PC

BOARD,

SWITCH

902

*

A-4617-453-A

MOUNTED

PCB,

DISP

903

*

1-632-492-11

PC

BOARD,

VOLUME

904

*

1-632-490-11

PC

BOARD,

JACK

905

*

A-4617-301-A

MOUNTED

PCB,

MAIN

906

1-575-002-11

WIRE,

FLAT

TYPE

(22

CORE)

907.

A.1-575-105-11

CORD,

POWER

FLD401

1-519-555-11

INDICATOR

TUBE,

FLUORESCENT

J501

1-568-519-21

JACK,

LARGE

TYPE

(PHONES)

Q201

8-729-111-67

TRANSISTOR

2SB1094-L

RV551

1-238-487-11

29

T901

A\.1-449-921-11

TRANSFORMER,

POWER

4-2.

MD

BLOCK

(CDM14-5BD1)

M191

908

Ref.No

Part

No.

51

4-933-111-01

52

7-621-775-10

53

*

4-917-583-21

54

4-927-649-01

55

4-933-109-01

56

4-927-651-01

57

4-927-628-01

58

4-933-107-01

59

4-933-112-01

Description

CHASSIS

(MD)

SCREW

+B

2.6X4

BRACKET,

YOKE

BELT

CAM

PULLEY

(S)

GEAR

(C)

GEAR

(PL)

TABLE,

DISK

Remarks

Ref.

No

Part

No.

60

4-933-110-01

61

A~-4675-347-A

62

4-933-134-01

63

4-917-541-01

64

4-933-129-01

65

4-933-108-01

908

*1-632-202-11

M191

A-4604-363-A

BU-5BD1

(including

65)

Description

Remarks

HOLDER

(MG)

MG

ASSY

SCREW

(+PTPWH

M2.6X6)

SPRING

(B)

HOLDER

(BU)

SHAFT

(CAM)

PC

BOARD,

LOADING

MOTOR

(L)

ASSY

Sony CDP-790 Bedienungsanleitung

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