Sony Disman D-25 Manuale utente

MICROFILM

SERVICE

MANUAL

Note:

Use

only

the

supplied

AC

power

adaptor

or

the

recommended

car

battery

cord

manufactured

by

Sony.

Polarity

of

the

plugs

of

other

manufacturers

may

be

different.

CAUTION

CD

section

System

Laser

diode

properties

Error

correction

D-A

conversion

Frequency

response

Dynamic

range

Signal-to-noise

ratio

Wow

and

flutter

Outputs

(at

9V

input

level)

*

Measured

by

EIAJ

CP-307

*Measured

by

ElAJ

CP-307

General

Power

requirements

Power

consumption

Dimension

Weight

Supplied

accessories

oo

@

Use

of

controls

or

adjustments

or

performance

of

procedures

other

than

those

specified

herein

may

result

in

hazardous

radiation

exposure.

SPECIFICATIONS

Compact

disc

digital

audio

system

Material:

GaAlAs

Wavelength:

780nm

Emission

duration:

Continuous

Laser

output:

Less

than

44.6

uW

*This

output

is

the

value

measured

at

a

distance

of

about

200mm

from

the

objective

lens

surface

on

the

Optical

Pick-up

Block.

Sony

Super

Strategy

Cross

Interleave

Reed

Solomon

Code

16-bit

linear,

4fs

digital

filter

20-20,000

Hz

+1dB*

More

than

90dB*

More

than

85dB

Below

measurable

limit

*

Line

output

(Stereo

minijack)

Output

level

0.7V

rms

at

50kilohms

Load

impedance

over

10kilonms

Headphones

(stereo

minijack)

9mW+9mMW

at

320hms

Supplied

rechargeable

battery

pack

BP-2

or

BP-100

(optional)

DC

IN

9V

jack

accepts:

Supplied

AC

power

adaptor

Sony

CPM-100P

car

mount

plate

(optional)

or

Sony

DCC-120A

car

battery

cord

(optional)

for

use

on

12V

car

battery

1.9W

DC

Approx.

125.8x20.8

134.6

mm

(5*?/4,.*5%4in.)

(w/hid)

not

incl.

inclined

part

(depth),

projecting

parts

and

controls

Approx.

127.3*24.1

x

136.2

mm

(51444,

x53,

in.)

(w/h/d)

incl.

projecting

parts

and

controls

Approx.

380g

(13.502),

not

incl.

rechargeable

battery

Approx.

460g

(1Ib)

incl.

rechargeable

battery

AC

power

adaptor

(1)

Rechargeable

battery

pack

(1)

Carrying

case

(1)

Connecting

cord

(1)

(stereo

miniplug

«>

two

phono

plugs)

US

Mode!

Canadian

Model

D-25

AEP

Mode!

UK

Mode!

E

Mode!

Australian

Mode!

D-250

DIStMAN

COMPACT

DISC

COMPACT

PLAYER

SONY.

D-25/250

|

TABLE

OF

CONTENTS

Section

Title

Page

Section

Title

Page

SPECINOCAMONY

Y.

Se

twee

wat

eae

Oe

eee

1

o:

ELECTRICAL

ADJUSTMENTS

.......

6

ie

GENERAL

4.

DIAGRAMS

Location

and

Function

of

Controls

......<..

2

ale.

CWAVEIOIMG

046%

9

Soke

A

ee

12

4-2.

Semiconductor

Lead

Layouts

.........

is

2.

SERVICING

NOTES

4-3.

Printed

Wiring

Boards

....<.<5¢s0<%5

14

Notes

on

Handling

the

Optical

Pick-up

Block...

3

at.

Schematic

pieet

OEE

a

ene

ete

ROG

7

‘Flexible

Circuit

Board

Repairing

2...

.<.<:s2.

3

4-5.

IC

Block

Diagram

........-...-.-.-

20

Notes

on

Chip

Component

Replacement

......

8)

Before

Replacing

the

Optical

Block

.........

3

5.

EXPLODED

VIEWS...............

22

Notes

on

Laser

Diode

Emission

Check

.......

4

Laser

Diode

Check

Procedure

.

2222-522

2522

4

6.

ELECTRICAL

PARTS

LIST.........

26

Service.

Mode

(service

program)

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

5

SECTION

1

GENERAL

Meror-

|

{(ola

Mr:

lalemm

all

laleqice)a

Mme);

Controls

HOLD

switch

Slide

this

switch

to

the

right

so

that

Its

orange

mark

appears.

This

locks

the

buttons

to

prevent

them

from

being

accidentally

depressed.

PHONES

(headphones)

jack

(stereo

minijack)

Display

window

Normally

the

track

number

and

the

elapsed

playing

time

are

shown,

When

the

power

is

supplied

through

the

DC

IN

9V

jack,

the

window

will

light

up.

VOLUME

control

(for

headphones

listening)

ENTER/REMAIN

button

EY

MODE

(AMS*/

SEARCH/INDEX)

button

PLAY

MODE

button

11

(play/pause)

button

w

STOP

button

LINE

OUT

jack

(stereo

minijack)

DC

IN

9V

(external

power

input)

jack

<q

|

(AMS/SEARCH!

INDEX)

buttons

OPEN

button

REMOTE

control

jack

Connect

the

optional

remote

control

kit.

*

AMS

is

the

abbreviation

of

Automatic

Music

Sensor.

|

D-25/250

SECTION

2

SERVICING

NOTES

ON

HANDLING

THE

OPTICAL

PICK-

Before

Replacing

the

Optical

Block

UP

BLOCK

Please

be

sure

to

check

thoroughly

the

parameters

as

par

the

“Optical

Block

Checking

Procedures”

ihe

dastr

ieee

a

tie

opieal

pick-up)

black

may

(Part

No.:

9-960-027-11)

issued

separately

before

suffer

electrostatic

breakdown

because

of

the

poten-

replacing

the

optical

block.

tial

difference

Eoneiied

by

the

charged

electrostatic

Note

and

specifications

required

to

check

are

given

load,

etc.

on

clothing

and

the

human

body.

belaw

During

repair,

pay

attention

to

electrostatic

break-

down

and

also

use

the

procedure

in

the

printed

@

FOK

output:

IC501

(9)

MISETEr

WMHS

TCG

CH

aE

neHepaye

Parks:

When

checking

FOK,

remove

the

lead

wire

to

disc

motor

and

unsolder

and

open

IC801

24)

pin.

@

S

carve

P-to-P

value:

2.95

Vp-p

Adjusted

part

for

focus

gain

adjustment:

RV505

Flexible

Circuit

Board

Repairing

RF

signal

P-to-P

value:

0.75

—

1.4

Vp-p

1.

Keep

the

temperature

of

the

soldering

iron

at

Traverse

signal

P-to-P

value:

1.8

Vp-p

270

210

¢

during

repairing.

The

grating

holder

can

not

repair.

2.

Do

not

touch

the

soldering

iron

more

than

4

seconds

or

3

times

on

the

same

conductor

of

the

circuit

board.

Adjusted

part

for

tracking

gain

adjustment:

RV501

3.

Do

not

apply

force

on

the

conductor

when

soldering

or

unsoldering.

Notes

on

chip

component

replacement

@

Never

reuse

a

disconnected

chip

component.

@

Notice

that

the

minus

side

of

a

tantalum

capacitor

may

be

damaged

by

heat.

SAFETY-RELATED

COMPONENT

WARNING!!

ATTENTION

AU

COMPOSANT

AYANT

RAPPORT

COMPONENTS

IDENTIFIED

BY

MARK

/\

OR

DOTTED

Ae

aoe

eE

LINE

WITH

MARK

/\

ON

THE

SCHEMATIC

DIAGRAMS

LES

COMPOSANTS

IDENTIFIES

PAR

UNE

MARQUE

/\

AND

IN

THE

PARTS

LIST

ARE

CRITICAL

TO

SAFE

SUR

LES

DIAGRAMMES

SCHEMATIQUES

ET

LA

LISTE

OPERATION.

REPLACE

THESE

COMPONENTS

WITH

DES

PIECES

SONT

CRITIQUES

POUR

LA

SECURITE

SONY

PARTS

WHOSE

PART

NUMBERS

APPEAR

AS

DE

FONCTIONNEMENT.

NE

REMPLACER

CES

COM.

SHOWN

IN

THIS

MANUAL

OR

IN

SUPPLEMENTS

PUB-

POSANTS

QUE

PAR

DES

PIECES

SONY DONT

LES

LISHED

BY

SONY.

NUMEROS

SONT

DONNES

DANS

CE

MANUEL

OU

DANS

LES

SUPPLEMENTS

PUBLIES

PAR

SONY.

D-25/250

|

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

objec-

tive

lens

in

the

optical

pick-up

block.

Therefore,

when

checking

the

laser

diode

emission,

observe,

from

more

than

30

cm

away

from

the

objective

lens.

Laser

Diode

Check

Procedure

The

laser

diode

on

this

set

will

not

emit

unless

the

top

panel

is

closed

and

$901

(leaf

SW

type)

is

turned

on.

The

laser

diode

will

always

emit

even

if

focus

search

is

not

performed

in

service

mode.

The

laser

diode

is

checked

using

the

current

value

which

flows

to

the

laser

diode

inside

the

UPF.

Procedure

1

(service

mode

or

normal

operation)

Check

the

laser

diode

emission

with

the

eye.

1.

Open

upper

panel.

2.

$901

on

as

Fig.

1.

(In

service

mode,

this

operation

is

not

neces-

sary.)

3.

Pressthe

PI

key.

(In

service

mode,

this

operation

is

not

neces-

sary.)

4.

Observe

the

objective

lens

and

confirm

that

the

laser

diode

is

emitting

light.

At

this

time,

the

laser

diode

goes

on

about

10

seconds

due

to

focus

serarch.

If

it

does

not,

APC

circuit

or

UPF

is

defective.

Fig.

1

Turning

S907

on

Procedrue

2

(service

mode

or

normal

operation)

Check

by

the

curent

with

flows

in

the

laser

diode.

1.

Close

the

top

panel.

2.

Remove

the

main

board

and

read

the

current

value

on

the

label

affixed

to

the

UPF.

(Label

on

UPF)

KSS-165A

JAPAN

$123

current

value

This

means

49.9

mA.

The

current

value

varies

with

the

set.

3.

Connect

a

VOM

as

shown

in

Fig.

2.

4.

Press

the

>§

key.

5.

Calculate

the

current

by

the

VOM

reading.

VOM

reading

(V)

+

10

=

current

(A)

ex.

VOM

reading

=

0.49

V

0.49

=

10

=

0.049

(A)

=

49

(mA)

6.

Confirm

that

the

ammeter

reading

is

within

the

range

given

below.

value

on

Jabel*?,

mA

(25-0)

variation

relative

to

temperature:

0.4

mA/°C

(Current

increases

when

temperature

rises

and

decreases

when

it

drops.)

If

the

value

is

more

than

the

range

given,

APC

circuit

has

been

defective

or

the

laser

diode

has

deteriorated.

If

it

is

less,

APC

circuit

or

UPF

is

defective.

—

servo

board

—

Fig.

2

VOM

Connection

SERVICE

MODE

(service

program)

This

set

has

built-in

service

program

in

the

micro-

computer

as

usual

sets.

The

operation

method

of

service

program

is

ex-

plained

below.

[

]:

Main

operation

in

service

mode

for

details,

refer

to

step

2.

@

(STOP)

[servo

all

off]

PER

(PLAY/PAUSE)

ie

OCUS

on

and

CLV-S

|

mode

(RUN-UP

mode)

on

PPI

(FF)

Peds

goes

to

ou

ei

circum

ference,

KEY-MODE

HOLD

l4(FR)

tracking

servo

gi

OFF

+ON

[

UPF

goes

to

inside)

sled

servo

on

REMAIN

circumference.

[display

stop]

Be

sure

to

set

HOLD

switch

OFF.

If

not

key

inputs

can

not

be

operated.

Fig.

3

Key

Positions

Step

1

(Service

Mode

setting

method)

1.

Turn

the

HOLD

switch

OFF

with

the

external

power

supply

not

plugged

in

(no

power

applied

to

set)

and

press

the

PEE

key.

2.

Solder

jumper

TEST

point.

(IC801

(9)

(BAT-E)

is

grounded.

3.

Plugin

external

power

supply.

This

puts

the

set

into

service

mode.

—

main

board

—

Step

2

(Service

Mode

operation)

1.

When

service

mode

is

set,

the

display

will

change

6

times,

and

those

6

changes

will

be

repeated

over

and

over.

With

this

the

LCD

display

should

be

present

in

service

mode,

Even

if

LCD

does

not

display,

other

operations

will

be

performed.

2.

When

PP|

or

Kd

key

is

pressed,

the

UPF

moves

to

the

inside

or

outside

circumference,

Tracking

servo

and

sled

servo

go

off

when

this

is

done,

so

press

KEY-MODE

to

turn

on

the

tracking

servo

if

necessary,

3.

When

REMAIN

is

pressed,

the

display

stops.

When

REMAIN

is

released,

the

display

con-

tinues

to

change.

This

allows

check

of

each

segment.

4.

When

Pill

key

is

pressed,

CLV-S

(pull-in

mode)

starts

while

performing

focus

search.

When

there

is

no

disc

installed,

focus

search

is

re-

peated

several

times

while

disc

motor

is

rotating.

5.

When

KEY-MODE

is

pressed,

tracking

servo,

sled

servo

and

CLV-A

(servo

during

PLAY)

go

ON.

6.

When

4

and

5S

are

performed,

the

disc

begins

to

play.

At

this

time,

the

top

panel

should

be

closed

and

S901

are

to

be

ON.

7.

All

servo

(focus,

tracking,

sled

and

spindle)

go

off

when

M@

key

is

pressed.

But

disc

motor

continues

rotating

for

a

while

by

inartia.

Step

3

(Service

Mode

release)

1.

First

be

sure

to

unplug

the

external

power

supply,

then

remove

the

TEST

point

solder

jumper.

2.

The

set

will

now

operated

normally.

TEST

Solder

jumper

for

service

mode.

G.

fter

checking

or

adjusting

in

service

ueee)

be

sure

to

remove

this

solder

jumper.

Fig.

4

TEST

Point

Position

—5—

SECTION

3

ELECTRICAL

ADJUSTMENTS

Notes

on

Adjustment

1.

Perform

adjustments

except

for

RECHARGEA-

BLE

VOLTAGE

ADJUSTMENT

and

BATTERY

DISPLAY

ADJUSTMENT

in

service

mode.

Be

sure

to

release

service

mode

after

completing

adjustment.

(Refer

to

“Service

Mode

(service

program)’

on

page

5.)

2.

Perform

adjustments

in

the

order

given.

3.

Use

YEDS-18

disc

(part

No.:

3-702-101-01)

unless

otherwise

indicated.

4.

Power

supply

voltage:

DC

9

V

HOLD

switch:

OFF

PREPARATION

Put

the

set

into

service

mode

(see

page

5)

and

per-

form

the

following

checks.

Repair

if

there

are

any

abnormalities.

@

Sled

Motor

Check

1.

Press

the

OPEN

button

and

open

the

top

panel.

2,

Press

the

>P|

,

Ke

keys

and

make

sure

that

the

UPF

moves

smoothly,

without

catching,

from

the

inmost

>

outmost

>

inmost

circumference.

pb

:

UPF

moves

outward

Kd:

UPF

moves

inward

@

Focus

Search

Check

1.

Press

the

OPEN

button

and

open

the

top

panel,

2.

Press

the

PHB

key.

continuously.)

3.

Observe

the

UPF

objective

lens

and

check

that

it

moves

smoothly

up

and

down

with

no

catching

or

noises.

4.

Press

the

@

key.

Check

that

focus

search

operation

stops.

If

it

does

not

stop,

press

the

M

key

again

longer

than

before.

But

disc

motor

continues

rotating

for

a

while

by

inartia.

(Focus

search

is

performed

VC

(1/2

Vec)

Connecting

Point

FOCUS

BIAS

ADJUSTMENT

TRACKING

BALANCE

ADJUSTMENT

When

the

adjustments

above

are

performed,

connect

the

()

side

of

oscilloscope

to

the

point

below.

oscilloscope

to

adjustment

point

{SERVO

BOARD]

Battery

Display

Adjustment

Procedure:

vom

(de

range)

main

board

+

TP

(VREF)

O——z;——-O

1€802

(i)

O=--7

.

Apply

de

+3.5

V

to

terminals

for

bult-in

battery

(BP-2).

.

Insert

the

disc

(YEDS-18)

and

put

the

set

into

play

mode.

.

Adjust

RV801

so

that

main

board

IC802

a)

voltage

and

TP

(VREF)

voltage

are

equal.

.

If

IC802

(11)

voltage

is

heigher

than

TP

(VREF)

voltage

when

turning

the

RV80O1

fully

counter-

clockwise,

short

the

jumper

point

(A)

as

shown

below

and

adjust

RV801.

Adjustment

Location:

main

board

battery

terminals

TP

1c802@

+6

V

Adjustment

Procedure:

vom

(de

range)

main

board

|

+

TP

(+6

eee

.

Put

the

set

into

service

mode

(see

page

5).

.

Connect

the

VOM

to

main

board

TP

(+6

V).

.

Adjust

RV401

for

+6+0.1

V

reading

on

the

VOM.

.

After

adjustment,

release

service

mode

(see

page

5):

Adjustment

Location:

main

board

TP(+6V)

+3.4

V

Adjustment

Procedure:

nee

)

main

board

|

+

:

1,

Put

the

set

into

service

mode

(see

page

5).

TP

(+3.4

V)

2.

Connect

the

VOM

to

main

board

test

point

TP

(+3.4

V).

3.

Adjust

the

pattern

connecting

(

@

or

©)

to

obtain

3.4

to

3.55

V

reading

on

the

VOM.

reading

Te

[|e

|

oe

ee

Xx

O:

short

X:

open

4.

After

adjustment,

release

service

mode

(see

page

5)

Adjustment

Location:

main

board

Rechargeable

Voltage

Adjustment

5

:

VOM

Adjustment

Procedure:

idcrange)

main

board

|

+

TP

(R.

aoe:

1.

Connect

the

VOM

to

main

board

test

point

TP

(R.V).

2.

Apply

DC

9V

with

requrated

dc

power

supply

from

external

power

jack

CN401.

3.

Adjust

RV402

for

7.05

—

7.5

V

reading

on

the

VOM.

Note:

Measure

after

the

VOM

reading

becomes

stable.

Adjustment

Location:

main

board

PLL

Free

Run

Frequency

Check

and

Adjustment

Check/Adjustment

Procedure:

6.

frequency

counter

servo

board

=

Boao

(PLCK)

O_O

.

Disconnect

the

jumper

point

@)

(EFM)

in

the

diagram

below.

.

Connect

a

frequency

counter

to

servo

board

test

point

TP

(PLCK).

.

Put

the

set

into

service

mode

(see

page

5).

.

Check

that

the

frequency

counter

reading

is

4.3218

+0.01

MHz.

If

not,

adjust

RV504

so

that

it

is

4.3218

0.01

MHz.

.

After

adjustment,

release

service

mode

(see

page

5):

Short

the

jumper

point

shorted

in

step

1.

Check/Adjustment

Location:

servo

board

TP

(PLCK)

RV504

EFM

solder

jumper

point

Disconnect

for

checking

and'

[eductment

Short

after

checking

and

adjustment.

:

7"

:

EFM

solder

——_

REMC

;

jumper

point

[Se

:

as

°

Si

+

aa

Bisal*

Tracking

Balance

Adjustment

Conditions:

The

set

should

be

placed

either

horizontally.

oscilloscope

(DC

range)

servo

board

e

TP

ec

cemenmaae

:

+

VC

(1/2

Vec)

Oo____O

—

(See

page

6.)

.

Connect

the

oscilloscope

to

servo

board

TP

(TE).

Adjustment

Procedure:

.

Put

the

set

into

service

mode

(see

page

5).

.

Press

the

PPI

and

44

keys

to

move

the

UPF

to

the

center.

.

Insert

the

disc

(YEDS-18)

and

close

the

top

panel.

.

Press

the

PBB

key.

It

will

go

from

focus

search

to

focus

on,

and

CLV

pull-in

mode

state.

Tracking

and

sled

are

OFF.

.

Adjust

RV502

so

that

the

oscilloscope

waveform

is

symmetrical

on

the

top

and

bottom

in

relation

todV.

Note:

Take

sweep

time

as

long.as

possible

to

obtain

best

waveform.

A A

1.3—2.3

Vp-p2V

oy:

8

A=B

A=8

.

Unplug

the

external

power

supply

to

stop

spindle

motor

from

rotating.

.

After

adjustment,

release

service

mode

(see

page

Si):

Adjustment

Location:

servo

board

na

ea

red

zt

=

ae

i

(esa)

,

Focus

Bias

Adjustment

Conditions:

The

set

should

be

placed

either

horizontally.

Adjustment

Procedure:

oscilloscope

(DC

rangei

servo

board

C)

TP

2kQ2

(RF)

O——w—_O

+

VC

(1/2

Vec)

O_O

--

(See

page

6.)

oscilloscope

(DC

range)

Olea

1C502

@8)

(FE)

oF

VC

(1/2

Vec)

Oo

—

(See

page

6.)

servo

board

Pa

ree

.

Put

the

set

into

service

mode

(see

page

5).

.

Connect

the

oscilloscope

to

servo

board

test

point

TP

(RF).

.

Press

the

PPI

and

KH

keys

to

move

the

UPF

to

the

center.

(Move

the

UPF

to

the

music

area

on

the

disc

to

enable

easy

visibility

of

the

eye

pat-

tern).

.

Insert

the

disc

(YEDS-18)

and

close

the

top

panel.

.

Press

the

P&B

key.

It

will

go

from

focus

search

to

focus

on,

and

[cu

pull-in

mode

state.

Tracking

and

sled

re)

OFF.

.

Press

the

KEY-MODE

button.

(Tracking

and

sled

go

ON.)

.

Adjust

RV503

so

that

the

oscilloscope

waveform

eye

pattern

is

good.

A

good

eye

pattern

means

that

the

diamond

shape

(0)

in

the

center

of

the

waveform

can

be

clearly

distinguished.

RF

Signal

Reference

Waveform

(eye

pattern)

VOLT/DIV:

200

mV

TIME/DIV:

500nS

SRR

AXXKAKAAKAKAY

|

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e2%2

on

y

Mh

WW

i

WHA

N

When

observing

the

eye

pattern,

set

the

oscillo-

AX

scope

for

AC

range

and

raise

vertical

sensitivity.

1

NY

O.1V

.

Unplug

the

external

power

supply

to

stop

spindle

motor

from

rotating

and

remove

the

disc.

.

Remove

the

disc

and

connect

the

oscilloscope

to

main

board

ICS02

@8)

(FE).

.

Adjust

RV503

again

refering

to

the

table

followed.

more

than

+50

mV

|

Not

adjust

again.

450.

mV

~

+20

mV

Adjust

RV503

again

for

+50

mV

.

reading

on

oscilloscope.

+20

mv

~

—20

mv

|

Adjust

RVS03

again

for

-20

mv

reading

on

oscilloscope.

less

than

—20

mV

Not

adjust

again.

After

adjustment,

release

service

mode

(see

page

5):

Adjustment

Location:

servo

board

|

Reference

|

Focus/Tracking

Gain

Adjustment

A

frequency

responce

analyzer

or

CD

jig

is

necessary

in

order

to

perform

this

adjustment

exactly.

However,

this

gain

has

a

margin,

so

even

if

it

is

slight-

ly

off,

there

is

no

problem.

Therefore,

do

not

per-

from

this

adjustment.

Focus/tracking

gain

determines

the

pick-up

followup

(vertical

and

horizontal)

relative

to

mechanical

noise

and

metchnical

shock

when

the

2-axis

device

operate.

However,

as

these

reciprocate,

the

adjustment

is

at

the

point

where

both

are

satisfied.

@

When

gain

is

high,

the

noise

when

the

2-axis

device

operates

increases.

@

When

gain

is

low,

it

is

more

susceptible

to

mecha-

nical

shock

and

skipping

occurs

more

easily.

This

adjustment

is

to

be

performed

when

replacing

the

following

parts:

@

optical

pick-up

block

@®

RV505

(focus

gain

VR)

®

RV501

(tracking

gain

VR)

Be

careful

not

to

move

RV505

(focus

gain

volume)

and

RVS50O1

(tracking

gain

volume)

ordinarily.

jsut

me

2

th

[

On

this

set,

it

is

very

difficult

to

simplify

this

adjustment.

For

those

sets

on

which

symptoms

such

as

‘‘occasional

skipping”

are

hard

to

discover,

or

it

is

hard

to

tell

if

the

set

has

been

repaired,

use

the

CD

jig

and

perform

this

adjustment.

Refer

to

the

diagram

below

for

connection

of

the

CD

jig.

The

adjustment

procedure

is

described

in

the

sepa-

rate

CD

Jig

Instruction

Manual.

CD

Jig

Connecting

Procedure:

Remove

the

solder

jumpers

at

the

TE

and

FE

loca-

tions

and

connect

the

DC

jig.

(Connect

the

points

on

both

TE

and

FE

located

on

the

side

of

IC501

to

the

output

to

the

CD

jig,

and

points

located

on

the

side

of

volumes

to

the

input

from

the

CD

jig.)

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servo

board

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