Sony CDP-557ESD Manuale utente

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Compact

disc

player

System

Laser

output

Frequency

response

Signal

to

noise

ratio

Harmonic

distortion

Wow

and

flutter

.

Below

measurable

limit

Channel

separation

Photo:

CDP-557ESD

SPECIFICATIONS

less

than

44.6

pW

*

This

output

is

the

value

measured

at

a

distance

of

200

mm

from

the

objective

lens

surface

on

the

Optical

Pick-up

Block.

CDP-557ESD:

2

Hz

—

20

kHz

+0.5

dB

CDP-707ESD:

2

Hz

—

20

kHz

+0.3

dB

More

than

115

dB

Less

than

0.0015%

More

than

110

dB

Outputs

LINE

OUT

(FIXED)

(phono

jacks)

:

LINE

OUT

(VARIABLE)

(phono

jacks)

DIGITAL

OUT

(COAXIAL)

(phono

jacks)

DIGITAL

OUT

(OPTICAL)

(optical

output

connector)

HEADPHONES

(stereo

phone

jack)

CAUTION

US

Model

Canadian

Model

CDP-707ESD

AEP

Made!

UK

Model

E

Model

COP-557ESD

Output

level

2

V

(at

50

kilohms)

Load

impedance

over

10

kilohms

Output

impedance

200

ohms

Output

level

max.

2

V

(at

50

kilohms)

Load

impedance

over

50

kilohms

Output

impedance

200

ohms

—

5.1

kilohms

Output

level

0.5

Vp-p

(at

75

ohms)

Load

impedance

75

ohms

Wave

length

660

nm

Output

level

-18

dBm

Output

level

max.

28

mW

Load

impedance

32

ohms

Use

of

controls

or

adjustments

or

performance

of

procedures

other

than

those

specified

herein

may

result

in

hazardous

radiation

exposure.

COMPACT

DISC

PLAYER

ON

Y.

CDP-557ESD/707ESD

General

AEP

Mocel!:

220

V

AC

(or

240

V

AC

adjustable

by

Sony

personnel),

50/60

Hz

Model

for

the

United

King

240

V

AC

(or

220

V

AC

adjustable

by

Sony

personnel),

50

Hz

US,

Canadian

Model:

(CDP-707ESD)

120

V

AC,

60

Hz

Power

—

=

|

22W

consumption

|

ee

Dimensions

“|

CDP-557ESD

(approx.)

(UK

Model)

Power

requirements

430

x

125

x

375

mm

(wih/d)

(17

x5

x

145/s

inches)

CDP-707ESD/

CDP-557ESD

(AEP

Model)

470

x

125

x

375

mm

(w/h/d)

(185/a

x

5

x

145/a

inches)

_|

including

projecting

parts

and

controls

Weight

(approx.)

|

CDP-557ESD

chp

ity

Se

(UK

Model)

17

kg

(37

lbs

8

02)

CDP-707ESD/

CDP-557ESD

(AEP

Model)

18

kg

(39

Ibs

11

oz)

1

(2

phono

plugs—2

phono

plugs)

Supplied

accessories

Audio

signal

connecting

cord

Remote

commander

Sony

SUM-3

(NS)

batteries

Screw

driver

SAFETY-RELATED

COMPONENT

WARNINGI!!

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.

Remote

commander

Remote

control

system

Infrared

control

Power

3V

DC

with

two

R6

(size

AA)

batteries

requirements

Dimensions

Approx.

62

x

20

x

168.5

mm

(w/h/d)

(24/2

x

4/16

x

63/4

inches)

Approx.

130

g

(5

02)

including

batteries

Weight

MODEL

IDENTIFICATION

—

Specification

Labels

—

SONY:

COMPACT

DISC

PLAYER

LLL

MODEL

NO,

SERIAL

NO.

MADE

.IN

JAPAN

US,

Canadian

model:

AC:

120

V~60Hz

22

W

AEP,

E

model:

AC:

220

V

~

50/60

Hz

22

W

UK

model:

AC:

240

V

~

50/60

Hz

22

W

Features

Custom

file

function

*

Disc

memo

function

for

writing

a

comment

about

a

disc.

*

Program

bank

function

for

storing

a

programmed

playing

order.

*

Custom

index

function

for

assigning

your

own

index

point

to

any

desired

position

on

a

disc.

Program

play

You

can

play

up

to

20

selections

in

the

desired

order.

Pause

can

be

also

programmed.

You

can

also

confirm

the

total

playing

time

while

choosing

the

selection

to

be

programmed.

.

Variety

of

playing

modes

Single

play,

program

play,

shuffle

play

and

repeat

play

as

well

as

normal

continuous

play

of

a

whole

disc.

Large

and

easy-to-read

window

display

Shows

the

elapsed

playing

time,

the

remaining

time

of

the

selection

being

played,

the

remaining

time

of

the

whole

disc

or

the

remaining

programmed

selection

numbers.

The

display

contains

a

music

calendar

indicating

all

the

numbers

of

the

selections

on

the

disc

(up

to

20).

ATTENTION

AU

COMPOSANT

AYANT

RAPPORT

A

LA

SECURITE!

LES

COMPOSANTS

IDENTIFIES

PAR

UNE

TRAME

ET

UNE

MARQUE

/\

SUR

LES

DIAGRAMMES

SCHE-

MATIQUES

ET

LA

LISTE

DES

PIECES

SONT

CRITIQUES

POUR

LA

SECURITE

DE

FONCTIONNEMENT.

NE

REM-

PLACER

CES

COMPOSANTS

QUE

PAR

DES

PIECES

SONY

DONT

LES

NUMEROS

SONT

DONNES

DANS

CE

MANUEL

OU

DANS

LES

SUPPLEMENTS

PUBLIES

PAR

SONY.

|

TABLE

OF

CONTENTS

Section

Title

Page

SPeCiiCatiONns.

434-6

wa

et

eat

whe

de

ote

A

]

Model

Identification

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

2

TGATULOS:

4,4:

cn

dove

eed

a

os

ied

&

Gene

a

hs

2

matety

Check-OUT

25:

fick

2

ae

aka

&

Ske

Bs

3

DELVICING

NOK.

6

cin

SS

ee

cule

oe

et

PR

eg

4

Location

of

Controls...................

5

EF

DISASSEMBLY

Nut

of

Vplume

Removal

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

6

2.

ELECTRICAL

ADJUSTMENTS

Adjustment

Mode.................

7

RF

PLL

Adjustment

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

e

Focus

Bias

Adjustment

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

8

E-F

Balance

Adjustment

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

8

Reference

—

Focus/Tracking

Gain

Adjustment

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

000000008

9

Distortion

Adjustment..............

10

=

3

DIAGRAMS

3-1.

Optical

Pcik-Up

Block

Mounting

Diagram

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

11

3-2.

IC

Block

Diagrams

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

13

Dd~

WAVELOPINS:

us

oq.

aiaes

chee

Ki

Oe

OE Se

16

3-4.

Main

Section

Mounting

Diagram

.......

18

3-5.

Main

Section

Schematic

Diagram

.......

23

3-6.

Display

Section

Mounting

Diagram

.....

28

3-7.

Semiconductor

Lead

Layouts

.........

28

3-8.

Display

Section

Schematic

Diagram

.....

31

4.

EXPLODED

VIEWS

AND

PAR

TS:

LISS:

ota

244}.

oad

eas

33

5,

ELECTRICAL

PARTS

LIST.........

40

Troubleshooting

Guide

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

48

CDP-557ESD/707ESD

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.

i)

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

(0.75

V)

—

Earth

Ground

Using

an

AC

voltmeter

to

check

AC

leakage.

CDP-557ESD/707ESD

SERVICING

NOTES

~NOTES

ON

HANDLING

THE

OPTICAL

PICK-

NOTES

ON

LASER

DIODE

EMISSION

CHECK

UP

BLOCK

OR

BASE

UNIT

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.

There-

fore,

when

checking

the

laser

diode

emission,

observe

more

than

25

cm

away

from

the

objective

lens,

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-

LASER

DIODE

AND

FOCUS

SERCH

OPERA-

down

and

also

use

the

procedure

in

the

printed

TION

CHECK

matter

which

is

included

in

the

repair

parts.

1.

Remove

disc

pully

by

lifting

up

chucking

arm

by

The

flexible

board

is

easily

damaged

and

should

be

hand,

(Fig.

A,

B)

handled

with

care.

2.

Make

POWER

switch

on

with

no

disc

inserted

and

disc

table

closed.

3.

Confirm

that

the

operation

indicated

in

Fig.

C

is

ADVARSEL!!

performed

while

observing

the

objecting

lens.

Under

service

ma

gjnene

ikke

komme

ner

objektiv-linsen

pa

den

optiske

pick-up

enhed.

|

tilfeelde

af

at

det

er

:

KY

ngdvendigt

at

kontrollere

udsendelsen

af

laserlys,

skal

det

ske

i

en

afstand

af

mere

end

25cm

fra

den

optiske

pick-up.

LASER

ADVARSEL

MARKNING

rig.

A

Remove

here

at

first.

Felgende

merkning

findes

indvendig

i

apparatet:

1.

Advarsel

Mzerkning

CAUTION

;

INvisiBLE

LASER

RADIATION

WHEN

OPEN

AND

INTERLOCKS

DEFEATED.

AVOID

EXPOSURE

TO

BEAM.

ADVARSEL

~

usyntiG

LASERSTRALING

VED

A®BNING

NAR

SIKKERHEDSAFBRYDERE

ER

UDE

AF

FUNKTION

UNDGA

UDSATTELSE

FOR

STRALING.

4

885

843

02

VAROITUS:

Laite

sisaltaa,

laserdiodin,

joka

lahettaa

(nakymatonta)

silmille

vaarallista

lasersateilya.

Fig.

B

Lift

up

chucking

arm

by

hand

in

the

direction

of

arrow.

(1)

Confirm

that

laser

beam

is

spread.

(2)

Up

and

down

motion

of

the

objective

lens.

(3

times}

Fig.

C

Note

on

the

Transit

Screw

Turn

the

unlt

upside

down

to

turn

the

screw.

NS

Transit

screw

J

Before

operating

the

CD

player,

be

sure

to

turn

the

transit

screw

as

described

on

the

label

on

the

bottom

of

the

unit.

1

Remove

the

cap

of

the

screw.

2

Turn

the

screw

180

degrees

counterclockwise

using

the

supplied

screwdriver.

Do

not

turn

the

screw

excessively,

or

the

unit

may

be

damaged.

When

transporting

the

unit

again,

turn

the

transit

screw

in

the

reverse

direction.

When

You

Use

the

CD

Player

for

the

First

Time

FILE

Illustration:

CDP-707ESD

Tum

on

the

power

by

pressing

POWER

while

keeping

ERASE

and

FILE

pressed.

This

will

clear

the

internal

memory

if

you

have

been

instructed

how

to

use

the

custom

file

function

at

the

shop

you

purchased

the

CD

player.

Thus

the

player

returns

the

same

status

as

it

was

manufactured

at

factory.

Mover-jt(e)a

Me)

Mmece)nyice)

(am

Front

Panel

>20

(over

20)

button

4— —»

INDEX

button

REPEAT

button

A.

SPACE/PAUSE

(auto

space/auto

pause)

button

DISPLAY

button

Disc

compartment

POWER

switch

CDP-557ESD/707ESD

CHECK

(program

check)

button

CLEAR

(program

clear)

button

FILE

(custom

file)

button

Numeric

buttons

INDEX

MODE

button

PLAY

MODE

buttons

PROGRAM

button

SHUFFLE

button

Remote

sensor

TIMER

switch

(open/close)

button

>

(play)

button

Display

window

KI

(pause)

button

*

AMS

Is

an

abbreviation

of

Automatic

Music

Sensor.

CONTINUE/SINGLE

button

LEVEL

control

|

LINE

OUTIHEADPHONE

HEADPHONES

jack

ERASE

(memory

erase)

button

<4

pp

(manual

search)

buttons

Ké<@

me!

(AMS*)

buttons

@

(stop)

button

Remote

Commander

PLAY

MODE

buttons

PGM

(program)

button

SHUFFLE

button

CONTINUE

button

SINGLE

button

(open/close)

button

>20

(over

20)

button

DISPLAY

button

A

<>

B

repeat

button

CLEARIREPEAT

(A

<>

B

repeat

clear/repeat)

button

>

(play)

button

Il

(pause)

button

g@

(stop)

button

Numeric

buttons

CLEAR

(program

clear)

button

FILE

(custom

file)

button

C.

INDEX

MODE

(custom

index

mode)

button

<4

>>

AMS

buttons

om

i.

INDEX

buttons

<4<4

p>

(manual

search)

buttons

<<

pp»

SLOW

(low

speed

manual

search)

buttons

LINE

OUT

VOLUME

(line

out/fheadphone

volume)

buttons

CDP-557ESD/707ESD

SECTION

1

DISASSEMBLY

NUT

OF

VOLUME

REMOVAL

After

loosen

the

nut

by

plier,

rotating

nut

with

tweezers

makes

easy

to

remove

it.

AC

power

cord

(1]

LINE

OUT

(audio

output)

jacks

FIXED:

Output

the

signal

at

the

fixed

level.

VARIABLE:

Output

the

signal

at

the

level

set

by

the

LINE

OUT/HEADPHONE

LEVEL

control.(or

LINE

OUT

VOLUME

buttons

on

the

remote

commander).

[2]

OUTPUT

SELECTOR

Selects

the

output

connectors

to

be

used.

DIGITAL

OUT:

Digital

signal

is

output

through

the

DIGITAL

OUT

jacks.

No

signal

is

output

through

the

LINE

OUT

jacks

or

the

HEADPHONES

jack.

LINE

OUT:

Audio

signal

is

output

through

the

LINE

OUT

jacks

or

the

HEADPHONES

jack.

No

signal

is

output

through

the

DIGITAL

OUT

jacks.

(Be

sure

to

set

to

this

position

when

you

listen

to

the

music

through

the

headphones

or

the

LINE

OUT

jacks.)

[3]

DIGITAL

OUT

(digital

audio

output)

jacks

Output

the

digital

audio

signals.

;

COAXIAL:

To

be

connected

to

a

digital

input

jack

of

the

amplifier

or

the

D/A

converter

unit.

OPTICAL:

To

be

connected

to

the

amplifier

having

an

optical

input

jack.

Note:

If

the

LINE

OUT/HEADPHONE

LEVEL

control

is

turned

while

recording

through

the

VARIABLE

LINE

OUT

jacks,

the

level

of

the

recorded

sound

will

be

dif-

ferent

from

that

set

by

the

recording

level

controls

of

the

tape

deck.

CDP-557ESD/707ESD

SECTION

2

ELECTRICAL

ADJUSTMENTS

2-1.

ELECTRICAL

ADJUSTMENTS

RF

PLL

Adjustment

1.

Perform

adjustments

in

the

order

given.

2.

Use

YEDS-18

disc

unless

otherwise

indicated.

Procedure:

fri

equency

coun

ter

digital

board

[

——

ee,

TP

(PLCK)

0=———_O

TP

(GND)

o-——o

3.

Use

the

oscilloscope

with

more

than

10

MQQ

im-

pedance.

1.

Connect

main

board

test

point

ASY

and

GND.

|

Adjustment

Mode

1.

Connect

digital

board

test

point

ADJ

and

GND.

This

is

to

prevent

the

disc

table

from

opening

2.

Connect

the

frequency

counter

to

main

board

test

points

TP

PLCK

and

TP

GND.

3.

Turn

POWER

switch

ON

(stop

mode).

.

Adjust

digital

board

RV201

so

that

reading

on

frequency

counter

is

4.3218

MHz

+3

kHz.

even

though

pits

are

not

read,

by

making

micro-

computer

[C301

pin

68)

low.

2.

Turn

POWER

switch

on.

(To

reset

microcomputer.)

5.

Reconnect

lead

wires

connected

in

adjustment

mode.

.

Put

disc

(YEDS-18)

in

and

press

®

PLAY

button.

After

adjustment,

remove

the

lead

wire

connecting

test

points

ADJ

and

GND.

Adjustment

Location:

digital

board

: ;

.

J

pais

a

ai

.

Confirm

that

reading

on

frequency

counter

is

4.3218

MHz.

Adjustment

Location:

digital

board

test

point

ADJ

(Connect

the

lead

wire

from

this

test

point

to

GND.)

TP

(PLCK)

CDP-557ESD/707ESD

Focus

Bias

Adjustment

E-F

Balance

Adjustment

This

adjustment

should

be

made

when

replacing

This

adjustment

should

be

made

when

replacing

Optical

Pick-up.

Optical

Pick-up.

Procedure:

Procedure:

oscilloscope

.

Connect

oscilloscope

to

test

points

TE

and

GND.

(DC

range)

: :

.

Put

set

into

adjustment

mode.

(See

page

7.)

digital

board

.

Turn

POWER

switch

on.

(mac

EN.

TP

(RF)

.

Put

disc

(YEDS-18)

in

and

press

®

button.

TP

(GND)

¢

|

0

.

Adjust

RV101

so

that

the

traverse

waveform

is

symmetrical

above

and

below.

_

Connect

oscilloscope

to

test

points

RF

and

GND.

.

After

adjustment,

cancel

the

adjustment

mode.

(See

page

7.)

.

Put

set

into

adjustment

mode.

(See

page

7.)

.

Turn

POWER

switch

on.

.

Put

disc

(YEDS-18)

in

and

press

>

button.

.

Adjust

RV104

for

an

optimum

waveform

eye

pat-

tern

or

so

that

the

peak

is

maximum.

Optimum

eye

pattern

means

that

shape

“©”

can

be

clearly

VOLT/DIV:

1V

ae

;

TIME/DIV:

ims

distinguished

at

the

center

of

the

waveform.

:

Adjustment

Location:

digital

board

\\

{

iit

XXXXX\

RHA

ha,

safe

eee

(XA

AAA

NN

Ny

\YXXX

;

Adjustment

Location:

digital

board

TP

(GND)

TP

(RF)

Distortion

Adjustment

This

adjustment

should

be

made

only

when

replacing

D/A

converter

and

components

of

the

—15

V

system

power

supply

block.

‘distortion

meter

LINEOUT

.

Put

disc

(YEDS-18)

in

and

playback

1

kHz,

0

dB

signal

track

(second

track).

.

Adjust

the

following

volumes

in

order

given

by

atrows

so

that

the

distortion

is

minimum.

L-CH:

RV404

>

RV403

>

RV401

>

RV402

R-CH:

RV504

>

RV503

>

RV501

>

RV502

.

Confirm

the

specification

is

satisfied.

When

out

of

specification,

repeat

item

2

and

3

several

times.

Specification:

0.003%

and

below

Adjustment

Location:

main

board

RV501

RV502

RV403

RV402

Oo

O

Oo

O

0

oO

90

9

RV504

RV503

RV404

RV401

CDP-557ESD/707ESD

CDP-557ESD/707ESD

REFERENCE

Focus/Tracking

Gain

Adjustment

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,

there

is

no

problem.

Therefore,

do

not

perform

this

adjustment.

Focus/tracking

gain

determines

the

pick-up

follow-

up

(vertical

and

horizontal)

relative

to

mechanical

noise

and

mechanical

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

operates

increases.

@

When

gain

is

lowered,

mechanical

shock

and

skipping

occurs

more

easily.

@

When

gain

adjustment

is

off,

the

symptoms

below

appear.

Tracking

e

The

time

until

music

starts

becomes

longer

for

STOP

>

DPLAY

or

automatic

selection

(Ke4,

PPI

buttons

pressed.)

(Normally

takes

about

1

seconds.)

e

Music

does

not

start

and

disc

continues

to

rotate

for

STOP

>PPLAY

or

=

_

automatic

selection.

(h4

PPI

buttons

pressed.)

e

Disc

table

opens

shortly

high

after

STOP>DPLAY.

e

Sound

is

interrupted

dur-

ing

PLAY.

Or

time

count-

er

aed

stops

progress-

e

More

noise

during

2-axis

high

high

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

positions

after

the

primary

adjust-

ment

are

only

a

little

different,

return

the

controls

to

the

original

position.

oscilloscope

(DC

range)

Procedure:

digital

board

[enti

TP

FE

OO

HH

ee

TP

TEOm-

-

1.

Keep

the

set

horizontal.

If

the

set

is

not

horizontal,

this

adjustment

cannot

be

performed

due

to

the

gravity

against

the

2

axis

device.

2.

Put

set

in

adjustment

mode.

(See

page

7.)

3.

Insert

disc

(YEDS-1)

and

press

®

PLAY

button.

4.

Connect

oscilloscope

to

servo

board

TP

FE.

5.

Adjustment

RV103

so

that

the

waveform

is

as

shown

in

the

figure

below.

(focus

gain

adjustment)

VOLT/DIV:

100mV

f

TIME/DIV:

2mS

@

Incorrent

Examples

(DC

level

changes

more

than

on

adjusted

waveform)

low

focus

gain

VOLT/DIV:

100mvV

TIME/DIV:

2mS

—OV

high

focus

gain

VOLT/DIV:

100

mV

y

TIME/DIV:

2mS

6.

Connect

oscilloscope

to

main

board

TP

TE.

7.

Adjust

RV102

so

that

the

waveform

is

as

shown

in

the

figure

below.

(tracking

gain

adjustment)

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

——

OV

Adjustment

Location:

digital

board

A

oof

Oo

RV103

\

(re)

RV102

(FE)

CDP-557ESD/707ESD

CDP-557ESD/707ESD

3-1.

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page

18

for

notes.

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