Philips CD304 MK II User manual

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2

Table of contents

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Compact

disc

player

CD304

MK

Il/coryesr

Service

Service

Service

35493

A12,

For

servicing

hints

for

the

CD

mechanism

see

Service

Manual

C.D.M.-1.

ervice

Manual

DIGITAL

AUDIO

CONTENTS

1.

Elucidation

on

the

lay-out

and

table

of

contents

per

page.

.

Control

buttons

and

technical

specification.

.

Servicing

hints.

.

Measurements

and

adjustments.

.

Exploded

views

and

parts

lists

of

mechanical

parts.

.

Block

diagram,

circuit

diagrams,

data

on

PCBs,

parts

lists

of

electrical

parts

and

wiring

diagram.

.

Faultfinding

method.

Remote

control.

Onh

WP

On

CLASS

1

Safety

regulations

require

that

the

set

be

restored

to

its

original

3127

10

aa

condition

and

that

parts

which

are

identical

with

those

specified

be

used.

Documentation

Technique

Service

Dokumentation

Documentazione

di

Servizio

Huolte-Ohje

Manual

de

Servicio

Manual

de

Servicio

Subject

to

modification

PH

|

LI

PS

Published

bysesrvice

4822

725

21058

Consumer

Elictronics

,

Printed

in

The

Netherlands

©

Copyright

reserved

CS

5

188

GB

UGE

1.

ELUCIDATION

ON

THE

LAYOUT

OF

THE

DOCU-

MENTATION

The

documentation

consists

of

chapters.

The

number

ofthe

chapter

is

indicated

by

the

first

digit

of

the

page

number.

The

second

digit

of

the

page

number

is

the

sequence

numbering.

If

modifications

or

supplements

require

new

supple-

mentary

or

replacement

pages,

the

page

number

is

extended

with

a

third

part:

A

digit

behind

the

page

number

indicates

that

it

concerns

a

supplementary

page.

A

replacement

page

is

indicated

by

a

letter

behind

the

page

number.

CS

5

189

6B

1-1

Example

3-6

is

page

6

of

chapter

3

3-6-1

is

a

supplementary

page

behind

page

3-6

3-6-a

is

the

replacement

page

of

page

3-6

(so

page

3-6

can

be

removed

from

the

documentation).

All

pages

are

provided

with

a

date

of

issue.

TABLE

OF

CONTENTS

PER

PAGE

Chapter

Page

Contents

Chapter

1

1-1

Elucidation

on

the

lay-out

of

the

6

documentation

1-2

Table

of

contents

per

page

2-1

Control

buttons

2-2

Technical

specification

3-1

Servicing

hints

3-2

List

of

service

aids

Initiating

the

service

loops

Demounting

the

top

cover

Demounting

the

bottom

plate

Replacing

glass

fuse

1451

Replacing

the

transformer

fuse

Servicing

the

front

Demounting

the

control

and

display

PCB

Demounting

the

headphone

amplifier

PCB

3-3

Servicing

the

supply

PCB

Servicing

the

servo

and

decoder

PCB

Servicing

the

IR

receiver

3-4

Servicing

the

tray

mechanism

4-1

Mechanical

measurements

and

adjustments

to

be

performed

on

the

CDM

Mechanical

adjustments

of

the

tray

mechanism

4-2

Specification

measurement

Changing

the

transformer

connections

Laser

power

supply

7

(POS.

VOLT.

SH.)

Checking

and

adjusting

Adjusting

the

focus

bandwidth

Check

of

the

AGC

and

offset

circuits

5

5-1

Parts

list

Exploded

view

tray

5-2

Exploded

view

cabinet

Parts

list

6

6-1

Block

diagram

6-2

Circuit

diagram

of

the

power

supply

8

6-3

Power

supply

PCBs

Parts

list

Mains

filter

circuit

6-4

Circuit

diagram

of

the

control

and

display

circuit

6-5

Control

and

display

PCBs

Parts

list

6-6

Circuit

diagram

servo

Circuit

(part

1)

Page

6-7

6-9

6-10

6-14

6-12

6-13

6-16

6-17

6-18

WP

PPT

NO

ODM

ONNNNN

~o14

i

wood

p-o

se

i)

Contents

~

Servo

PCB

Parts

list

Servo

PCB

Parts

list

Circuit

diagram

servo

Circuit

(part

2)

Circuit

diagram

Decoding

circuit

(part

1)

Decoding

PCB

Parts

list

Decoding

PCB

Parts

list

Circuit

diagram

Decoding

circuit

(part

2)

Circuit

diagram

Tray

control

PCB

Parts

list

Circuit

diagram

of

headphone

amplifier

Headphone

amplifier

PCB

Parts

list

Circuit

diagram

of

the

IR

receiver

PCB

drawing

of

the

IR

receiver

Wiring

diagram

for

CD304/60R/65R

List

of

standard

symbols

List

of

chip

components

Faultfinding

method

Faultfinding

method

Faultfinding

method

Faultfinding

method

Faultfinding

method

Faultfinding

method

*

Faultfinding

method

Faultfinding

method

Faultfinding

method

Faultfinding

method

Faultfinding

method

Faultfinding

method

Exploded

view

of

the

remote

control

Parts

list

Circuit

diagram

of

the

remote

control

PCB

drawings

of

the

remote

control

CS

5

199.GB

DIGITAL

AUDIO

2.

CONTROLS

22

OMAN

Oak

WN

=

—

«a

—_—

©

ON/OFF

OPEN/CLOSE

TIME

TRACK

SCAN

SELECT

down

SELECT

up

STORE

CANCEL

Headphone

socket

Headphone

level

potentiometer

SK1

SK15

SK12

SK5

SK13

SK6

SK14

SK7

SK11

BU1

3751

2

3456789

11

10

12

13

1415

12

13

14

15

16

17

18

19

20

21

22

21

20

PREVIOUS

NEXT

REPEAT

PAUSE

SEARCH

REVERSE

SEARCH

FORWARD

START/REPLAY

STOP/Clear

Memory

DIGITAL

OUTPUT

FTD

DISPLAY

INPUT

IR

REMOTE

CONTROL

SK4

SK10

SK18

SK9

SK19

SK8

SK17

SK16

BU3

1051

6851

2-1

18

19

16

17

CS

5

191GB

-2

ECHNICAL

SPECIFICATION

System

Mains

voltages

Mains

frequencies

Power

consumption

Frequency

range

‘Output

voltage

‘Output

impedance

‘S/N

ratio

:

Compact

Disc

Digital

Audio

System

:110

V,

127

V,

220

V,

240

V

+

10%

(to

be

changed

by

changing

the

transformer

connections)

:

50

Hz,

60

Hz

(no

conver-

sion

required)

:<

25W

:2

Hz

+

20

kHz

+

0.05

dB

:

O-max.

2

Vrms

:

200

Q

:

=

96

dB

®

Headphone

~

output

voltage

—

output

impedance

e

Channel

separation

®

Channel

difference

©

Overall

harmonic

distortion

@

Intermodulation-

distortion

©

De-emphasis

e

Dimensions

(wxhxd)

©

Weight

The

above

specifications

apply

within

a

frequency

range

of

20

Hz

+

20

kHz

CS

§

192

GB

:

0-max.

5.6

Vrms

>=

15002

:

=

93

dB

:<

0.6

dB

>

<=

0.003%

:

<=

0.003%

:

50

ps

or

15

ps

(switched

by

the

subcode

on

the

disc)

:

420x92x300

mm

(tray

closed)

:

420x92x450

mm

(tray

opened)

>

approx.

7

kg

DIGITAL

AUDIO

3.

SERVICING

HINTS

In

order

to

prevent

loose

metal

objects

from

getting

in

the

CD

mechanism

it

will

be

necessary

to

see

to

a

clear

repair

station.

Before

the

player

is

being

used

or

serviced,

the

transportation

screws

should

be

removed.

These

screws

have

to

be

reapplied

after

servicing.

The

objective

can

be

cleaned

with

a

blow

brush.

For

servicing

hints

for

the

CD

mechanism

refer

to

Service

Manual

CDM-0

and

CDN-1.

Do

not

loosen

any

screws

other

than

those

mentioned

in

the

hints.

All

ICs

and

many

other

semi-conductors

are

susceptible

to

electrostatic

discharges

(ESD).

Careless

handling

during

repair

can

reduce

life

drastically.

When

repairing,

make

sure

that

you

are

connected

with

the

same

potential

as

the

mass

of

the

set

via

a

wrist

wrap

with

resistance.

Keep

components

and

tools

also

at

this

potential.

GENERAL

CHIP

COMPONENT

SOLDER

SOLDER

COPPER

TRACK

Sic

PCB

GLUE

SOLDERING

fe}

SOLDERING

IRON

SERVICE

PACKAGE

DISMOUNTING

VACUUM

PISTON

SOLDERING

4822

395

10082

IRON

™~

Xi

e.g

WELLER

SOLDER

TIP

PT-H7

SOLDERING

IRON

SOLDER

WICK

4822

321

40042

e.g.

A

PAIR

OF

TWEEZERS

HEATING

x

SOLDERING

IRON

SOLDER

WICK

=

CHIP

COMPONENT

Fig.

2

PRECAUTIONS

3-1

The

disc

should

always

bed

down

well

on

the

turntable.

For

this

purpose

a

disc

hold-down

has

been

mounted

in

a

bracket

of

the

drawer

mechanism.

When

the

drawer

mechanism

has

to

be

demounted

for

repair,

a

loose

hold-down

should

be

employed.

The

set

can

then

function

normally.

Code

number

of

the

disc

hold-down

is

4822

532

60906.

SERVICE

AIDS

Service

supports

Audio

performance

test

disc

Disc

without

local

defects,

Disc

with

DO

failures,

black

spots

and

finger-prints

4822

395

30202

4822

397

30085

4822

397

30096

Screwdriver

set

TORX

Set

straight

4822

395

50145

Set

square

4822

395

50132

Disc

hold

down

4822

532

60906

7

th

order

filter

4822

395

30204

IR

receiver

4822

212

21449

MOUNTING

e.g.

A

PAIR

OF

TWEEZERS

Wy

SOLDER

@0.5

-

0.8

mm

SOLDERING

IRON

;

OR

PRESSURE

+

SOLDER

@0.5

-

0.8mm

SOLDERING

TIME

<3

sec/side

B

PRESSURE

/

SOLDERING

t +

IRON

/_

HEATING

“

CLEANING

EXAMPLES

27

012C12

CS

§

193

GB

3-2

The

servo

uP

can

beset

to

the

servicing

mode

to

check

the

switch

and

display

PCB

and

to

separately

test

the

servo

systems.

INITIATING

SERVICE

LOOP

A

-——

Put

a

disc

on

the

turntable.

—

Simultaneously

depress

the

CANCEL,

PREVIOUS

and

STOP

keys.

Keep

these

three

keys

depressed

while

switching

on

the

mains

voltage.

In

this

situation

the

laser

and

focus

contro!

are

operative

and

the

turntable

motor

is

running.

The

light

pen

remains

situated

under

the

lead-in

tracks.

The

radial

servo

system

is

switched

off.

In

this

service

loop

the

display

can

be

checked

as

follows:

—

The

display

will

indicate

01.02,

then

02.04,

03.06

and

continue

in

this

way

up

to

20.40.

20.40

is

followed

again

by

00.00, 01.02,

etc.

The

indicators

SCAN,

PAUSE,

REPEAT

and

DISC

ERROR

will

light

up

and

will

remain

switched

on.

At

indication

01.02,

bar

1

of

the

track

bar

is

also

driven

and

at

02.04

bar

2,

etc.

—

If

now

the

CANCEL

key

is

depressed,

the

TRACK

indication

will

light

up

after

2

clock

strokes

of

the

display

and

the

DISC

ERROR

indication

will

go

off.

The

player

stays

in

service

loop

A.

INITIATING

SERVICE

LOOP

B

The

player

can

be

brought

from

service

loop

A

into

service

loop

B

by

depressing

the

STORE

key.

Now

the

radial

servo

system

has

been

switched

on

independently

of

the

P-bit

and

the

sub-code.

The

display

makes

clear

that

the

set

is

in

service

loop

B

by

means

of

ABS,

REL

and

TOT.

The

player

can

be

brought

from

service

loop

B

in

the

PLAY

mode

by

depressing

the

START/REPLAY

key.

For

adjustments

that

have

to

be

performed

on

the

lower

side

for

which

the

unit

should

be

in

the

position

of

normal

end

use,

servicing

supports

are

supplied.

Code

number

is

4822

395

30202.

These

supports

can

be

mounted

in

the

four

holes

of

the

frame.

DEMOUNTING

THE

TOP

COVER

—

Remove

the

4

screws

in

the

sides.

—

Remove

the

cover

from

the

set

by

pulling

it

backwards.

Attention

When

mounting

the

top

cover;

care

should

be

taken

that

the

top

cover

is

placed

correctly

in

the

guidings

of

the

front

before

mounting

the

four

screws.

CS

5

194¢6R

DEMOUNTING

THE

BOTTOM

PLATE

—

Remove

the

4

screws

in

the

bottom

plate.

—

Pick

up

the

bottom

plate

at

the

rear

of

the

set

and

pull

it

from

the

3

fixing

bosses

at

the

front

of

the

set.

REPLACING

GLASS

FUSE

1451

—

Remove

the

top

cover.

—

The

fuse

on

the

mains

filter

PCB

can

now

be

reached

at

the

left-hand

side

of

the

set

via

a

hole

in

the

mains

filter

housing.

REPLACING

THE

TRANSFORMER

FUSE

—

Remove

the

bottom

plate.

—

Remove

the

plastic

cap

covering

the

underside

of

the

transformer.

—

The

transformer

fuse

is

now

accessible.

—

Replace

the

screening

cap

once

the

fuse

has

been

replaced.

SERVICING

THE

FRONT

Demounting

the

front.

—

Remove

the

top

cover.

—

Remove

the

3

fixing

screws

at

the

upper

side

and

the3

screws

at

the

lower

side

of

the

front.

—

The

front

can

now

be

removed

from

the

set

by

pulling

it

forwards.

—

After

loosening

various

connections

and

connectors,

the

front

of

the

set

can

be

removed.

Demounting

the

control

and

display

PCB

—

Remove

the

9

screws

on

the

control

and

display

PCB.

—

The

PCB

can

now

be

taken

away

with

the

headphone

PCB

still

in

place.

Demounting

the

headphone

PCB

Once

the

control

and

display

PCB

has

been

taken

away,

the

headphone

PCB

can

be

removed.

SERVICING

THE

SUPPLY

PCB

—

Remove

the

2

screws

B

(see

Fig.

3a).

—

When

the

connectors

have

been

loosened,

the

supply

PCB

can

be

taken

out

of

the

set

from

the

rear.

Attention

The

Audio

cable

is

soldered

to

the

decoder

PCB.

When

mounting

the

supply

PCB

care

should

be

taken

that

the

PCB

falls

in

the

guiding

on

the

frame.

SERVICING

THE

SERVO

PCB

AND

THE

DECODER

PCB

(see

Fig.

3a)

—

Remove

the

top

cover.

—

Remove

the

2

screws

A

on

the

PCB

holder.

—

When

the

PCB

holder

is

placed

in

the

service

position

(see

Fig.

4)

measurement

can

be

performed

on

both

the

servo

PCB

and

the

decoder

PCB.

SERVICING

THE

IR

RECEIVER

For

practical

reasons,

it

is

best

to

service

the

IR

receiver

by

means

of

the

trial

and

error

method,

with

which

defects,

if

any,

are

traced.

Code

number

of

IR

receiver:

4822

212

21449.

After

removing

the

bottom

plate,

this

receiver

can

be

con-

nected

via

plug

91.

Demounting

the

IR

receiver:

—

Remove

the

top

cover.

—

Remove

the

loading

mechanism

—

When

clamping

spring

555

has

been

removed,

the

receiver

can

be

demounted.

Before

mounting

the

new

receiver,

be

sure

to

first

adapt

it

according

to

the

originally

mounted

version.

as

SERVO

PC.B

==

Qe

HEAOPHONE

PC.B.

CONTROL

AND.

DISPLAY

PC.By

CONTROL

+DISPLAY

PCB.

Fig.

3b

36

SOTAT

36

600

87

Fig.

3a:

3G

59987

Fig.

4

CS

5195GB

3-4

SERVICING

THE

TRAY

MECHANISM

Demounting

the

tray

mechanism

—

Remove

the

top

cover.

—

Remove

the

front.

~—

Remove

the

4

screws

C

(see

Fig.

3a).

—

Loosenconnectors

61

and

64

on

the

tray

control

PCB.

—

The

tray

mechanism

can

now

be

taken

out

of

the

set.

—

For

repairs

the

tray

mechanism

can

be

made

operative

outside

the

set

by

fixing

again

connectors

61

and

64

on

the

drawer

control

PCB.

—

Involtageless

condition

the

drawer

can

be

opened

by

moving

the

drawer

forward

by

means

of

a

non-

scratching

sharp

device

(for

example

finger

nails)

that

is

placed

between

front

and

drawer.

Attention

If,

during

arepair,

the

tray

mechanism

or

the

tray

control

PCB

has

been

demounted,

the

set

will

not

function.

To

avoid

this

the

contacts

of

the

tray

in-end

switch

SK2

on

the

tray

control

PCB

should

be

interconnected.

Replacing

the

disc

hold-down

—

See:

Exploded

View

Tray.

—

Place

the

disc

hold-down

(item

107)

in

its

highest

position

(drawer

opened

as

far

as

possible).

—

The

disc

hold-down

can

be

loosened

by

bending

the

2

lugs

on

bracket

item

508

apart

and

taking

out

the

disc

hold-down.

CS

5

196

GB

Replacing

the

tray

motor

—

See:

Exploded

View

Tray.

—

Demount

the

tray

mechanism.

—

Remove

the

belt

(item

129)

from

the

motor

pulley.

—

Remove

the

2

screws

with

item

no.

119.

—

The

motor

can

now

be

loosened.

Demounting

the

drawer

(item

127)

and

lifting

piate (item

513)

assy

See:

Exploded

View

Tray.

—

Demount

the

tray

mechanism.

—

Remove

motor

bracket

item

509

by

undoing

the

3

screws

on

bracket

item

509.

—

Remove

roller

item

108

by

loosening

the

spring

ring.

—

Slide

the

tray

forward

and

remove

it.