Onkyo Dx-6550 User manual

DX-6550

SERIAL

NO.

3307

ONKYO.:

SERVICE

MANUAL

COMPACT

DISC

PLAYER

MODEL

DX-6550

»

Black

and

silver

models

SAFETY-RELATED

COMPONENT

WARNING!!

SPECIFICATIONS

COMPONENTS

IDENTIFIED

BY

MARK

A\

ON

THE

Signal

readout

system:

—

Optical

non-contact

SCHEMATIC

DIAGRAM

AND

IN

THE

PARTS

LIST

ARE

Reading

rotation:

About

500~200

r.p.m.

CRITICAL

FOR

RISK

OF

FIRE

AND

ELECTRIC

SHOCK.

(constant

linear

velocity)

REPLACE

THESE

COMPONENTS

WITH

ONKYO

PARTS

Linear

velocity:

1.2~1.4m/s

WHOSE

PART

NUMBERS

APPEAR

AS

SHOWN

IN

THIS

Error

correction

system:

Cross

interleave

readsolomon

MANUAL.

code

Decoded

bits:

18

bits

linear

MAKE

LEAKAGE-CURRENT

OR

RESISTANCE

MEA-

Sampling

frequency:

176.4kHz

(four-times

SUREMENTS

TO

DETERMINE

THAT

EXPOSED

PARTS

oversampling)

ARE

ACCEPTABLY

INSULATED

FROM

THE

SUPPLY

Number

of

channels:

2

(stereo)

CIRCUIT

BEFORE

RETURNING

THE

APPLIANCE

TO

Frequency

response:

5H2~20kHz

THE

CUSTOMER.

Total

harmonic

distortion:

0.003%

(at

1kHz)

Dynamic

range:

96dB

Signal

to

noise

ratio:

96dB

Channel

separation:

96dB

(at

1kHz)

Wow

and

Flutter:

Below

threshold

of

measurability

Power

consumption:

15

watts

Output

level:

2

volts

r.m.s.

Dimensions

(WXHxXD):

435131365

mm

17-1/8"

5-1/8"

x

14-7/16"

Weight:

8kg,

17.6

lbs.

ONKYO

Specifications

are

subject

to

change

without

notice.

242

DD

Giskersy0)

TABLE

OF

CONTENTS

Specifications

oiceu:

scisicses

pavsie

dew

gssaeaewse.secedsereseons

1

Service

procedures

...........ccceeceeeceea

ee

eceeeeeeeeeeneeaes

Note

on

compact

disc

.............eeceeeeeeceeeetee

een

eeeeenens

3

Protection

of

eyes

from

laser

beam

during

servicing

..

4

Laser

warning

label

...............cccceeeeeeceeeeececueeeeneens

4

Caution

on

replacement

of

pickup

.................:eeeeeees

6

Packing

View:

ss

.cssetescd.asaedanssateatanesbyenssaasadnssaartasecs

7

Chassis-exploded

View

.............ccccceceeeeeceeeeeneeneeeeees

8

Parts

St

seas

dnvaccangsyee

wis

tuas

aeyed

oie

taclacncendy

vescavesboeaeases

9

Mechanism-exploded

View

............csceeeeeceeeeeeeeenees

10

Parts:

lISt:

sve.

tsdensCreshevtnes

gitnacdats

ae

etandeeelavdenearscee.

11

Disassembling

procedures

..............ececceeeeeeeeceeeeees

11

LUbricatiOn:

o.3.05

sccpeesscceeantaver

esas

ancedaaweddecaseatneets

12

IC

block

diagram

and

descriptions

..............:..e00e0

13

Adjustment

procedures

............scceceeesceeceeceecneen

ens

22

Printed

circuit

board

view

from

bottom

side

Main:

¢ircuit'sco:.ci.2.eccsscstdvedeile

cavenettvlvavcartexteveds

25

Other

pc

boards

..........

cece

eec

eee

eec

sence

eeeeereeaenees

29

Printed

circuit

board-parts

list

.............cccceeeeeeeee

ees

27

Block

diagram

...........ccecececeeeeeeeeeeeceeeeeeeeeeeeeeneas

31

SERVICE

PROCEDURES

1.

How

to

Release

the

Transport

Lock

To

protect

the

optical

assembly

including

the

laser

pickup

from

vibration

during

shipping,

this

unit

is

equipped

with

a

transport

lock

lever

located

on

the

base.

60+

head

screwdriver

Lock

lever

:

Hole

|

@

Usea

screwdriver

to

turn

the

lock

lever

(about

90°)

in

the

round

hole

in

the

direction

of

arrow

(

G

).

®

Before

transporting

the

unit

again,

stand

it

with

its

left

side

facing

down,

and

turn

on

the

power.

Wait

2-3

seconds

and

then

turn

the

lock

lever

in

the

opposite

direction

of

the

arrow.

Fig.

1

2.

Safety-check

out

After

correcting

the

original

service

problem,

perform

the

following

safety

check

before

releasing

the

set

to

the

customer:

Connect

the

insulating-resistance

tester

between

the

plug

of

power

supply

cable

and

chassis.

Specifications:

more

than

10Mohm

at

500V.

~2-

3.

Procedures

for

replacement

of

flat

packaged

ICs

1.

Tools

to

be

used:

(1)

Soldering

iron

....

Grounded

soldering

iron

or

soldering

iron

with

leak

re-

sistance

of

10

Mohms

or

more.

Form

of

soldering

iron’s

tip:

(2)

Magnifying

glass...

for

checking

of

finished

works

(3)

Tweezers........

for

handling

of

IC

forming

of

leads

(4)

Grounding

ring...

.

Countermeasure

for

electro-

static

breakdown

(5)

Nipper

.........

for

removing

defective

IC

(6)

Small

brush

......

for

application

of

flux

and

2.

Work

Procedures:

(1)

Remove

the

defective

IC

Cut

all

leads

of

the

defective

IC

one

by

one

using

a

nipper

and

remove

the

IC.

(2)

Clean

the

pattern

surface

of

the

PC

board.

Get

rid

of

the

remaining

leads

and

solder.

(3)

Check

and

from

the

leads

of

the

new

flat

pack-

aged

IC

to

be

installed.

From

every

lead

on

the

new

IC

using

a

pair

of

tweezers,

so

that

all

of

them

are

aligned

neatly

without

being

risen,

twisted

or

inclined

toward

one

side.

Especially

the

rising

portion

of

every

lead

must

be

formed

with

greatest

care.

IC

ee

;

IC

&

;

Ic

a

(Incliming)

(Rising)

(Twisting)

Fig.

3

(4)

Apply

flux

to

the

PC

board.

Apply

flux

to

the

pattern

surface

of

the

PC

board

which

has

been

cleaned,

as

shown

in

the

illustration.

The

area

to

be

applied

with

flux

is

the

portion

of

about

2.5mm

in

width

where

the

IC’s

leads

are

to

be

soldered.

Be

careful

to

apply

minimum

amount

of

flux

required

so

as

not

to

smear

it

on

unwanted

areas.

About

2.5

mm

Fig.

4

(5)

Temporarily

tighten

the

IC

Carefully

align

the

pattern

and

IC’s

leads,

so

that

the

IC

will

be

temporarily

tightened

to

the

pattern

on

the

four

leads

at

the

corners.

At

this

time,

sol-

dering

is

required,

but

no

need

to

apply

soldering

material.

Fig.

5

(6

—

Apply

flux

to

IC’s

leads

Apply

flux

to

the

areas

of

IC’s

leads

where

soldering

is

to

be

performed.

Be

careful

not

to

smear

flux

on

the

root

portion

of

any

lead

or

the

body

of

IC.

Apply

flux

only

to

this

portion.

(7

—

Soldering

While

attaching

the

tip

of

the

soldering

iron

to

the

soldering

point

as

shown

in

the

illustration,

feed

2

—5mm

of

soldering

wire.

Then,

slowly

move

the

iron

in

the

direction

indicated

by

the

arrow

in

the

illustration,

so

that

the

leads

will

be

soldered

to

the

pattern.

Move

the

iron

in

the

rate

of

approxi-

mately

lcm

in

Ssec.

Proceed

with

your

work

while

confirming

a

clean

fillet

of

solder

is

formed

on

each

lead,

subsequent

to

the

melting

of

flux.

Soldering

wire

Fig.

7

Soldering

iron

CAUTION

1)

If

you

move

the

iron

too

quickly,

loose

soldering

is

likely

to

result.

2)

Be

especially

careful

‘when

soldering

the

first

lead

where

loose

soldering

is

most

liable

to

be

formed.

(8)

Check

the

results

When

soldering

of

all

leads

is

finished,

check

the

soldered

portion

on

every

lead

with

a

magnifying

glass.

A

tester

must

not

be

used

or

checking

of

any

soldered

position

NOTE

ON

COMPACT

DISC

@

Holding

Compact

Discs

Hold

Compact

Discs

by

the

edges

so

that

you

do

not

touch

ae

DX-6550

the

surface

of

disc.

Remember

that

the

side

of

the

disc

with

the

“rainbow”

reflection

is

the

side

containing

the

audio

information.

Do

not

attach

tape

or

paper

to

the

label

side

of

the

disc

and

always

be

careful

not

to

leave

fingerprints

on

the

side

that

is

played.

@

Storing

Compact

Discs

Store

Compact

Discs

in

a

location

protected

from

direct

sunlight,

high

heat

and

humidity

and

extremely

high

and

low

temperatures.

Discs

should

never

be

left

in

the

trunk

or

interior

of

an

automobile

in

the

sun

since

the

temperature

can

become

very

high

in

such

a

closed

environ-

ment.

Always

store

Compact

Discs

in

the

holders

in

which

they

were

sold.

Never

leave

a

disc

in

the

player’s

disc

holder

for

a

long

period

of

time.

Not

this

way

Fig.

8

©

Cleaning

Compact

Discs

Before

playing

a

disc

wipe

off

the

playing

surface

with

a

soft

cloth

to

remove

dust

and

other

soil.

Wipe

the

surface

in

straight

lines

from

the

center

of

the

disc

outward,

not

in

a

circular

motion

as

you

would

with

a

phonograph

record.

Do

not

use

benzene,

chemical

cleansers

or

phonograph

record

cleaning

solutions

to

clean

Compact

Discs.

Also

avoid

static

electricity

prevention

solutions

since

they

can

damage

the

surface

of

Compact

Discs.

Problems

Caused

by

Dew

can

form

inside

a

Compact

player

when

it

is

brought

from

a

cold

environment

into

a

warm

room,

when

a

room

is

rapidly

heated

and

if

a

player

is

left

in

a

humid

environ-

ment.

This

dew

can

prevent

the

laser

pickup

from

reading

the

data

contained

in

the

pits

in

the

disc

surface.

If

the

player

does

not

operate

properly

because

of

dew,

remove

the

disc

and

leave

the

player’s

power

switch

on

for

about

one

hour

to

remove

all

moisture.

DX-6550

PROTECTION

OF

EYES

FROM

LASER

BEAM

DURING

SERVICING

This

set

employs

a

laser.

Therefore,

be

sure

to

follow

carefully

the

instructions

below

when

servicing.

WARNING!!

WHEN

SERVICING,

DO

NOT

APPROACH

THE

LASER

EXIT

WITH

THE

EYE

TOO

CLOSELY.

IN

CASE

IT

IS

NECESSARY

TO

CONFIRM

LASER

BEAM

EMMISION,

BE

SURE

TO

OBSERVE

FROM

A

DISTANCE

OF

MORE

THAN

30cm

FROM

THE

SURFACE

OF

THE

OBJECTIVE

LENS

ON

THE

OPTICAL

PICK-UP

BLOCK.

LASER

WARNING

LABEL

The

label

shown

below

are

affixed.

1.

Warning

label

Laser

Diode

Properties

@

Material:

GaAS/GaAlAs

®

Wavelength:

780nm

@

Emission

Duration:

continuous

@

Laser

output:

max.

0.5mW*

*This

output

is

the

value

measured

at

a

distance

about

1.8mm

from

the

objective

lens

surface

on

the

Optical

Pick-up

Block.

DANGER

RNVISIBLE

LASER

RADIATION

WHEN

OPEN

AND

INTERLOGK

FAILED

OR

DEFEATED.

AVOID

DIRECT

EXPOSE

fe

BEAM

CAUTION

—sazarpous

Laser

ano

ELECTROMAGNETIC

RADIATION

WHEN

OPEN

ANO

INTERLOCK

DEFEATED.

ATTENTION

—aavonnement

LASER

ET

ELECTROMAGNETIQUE

DANGER

QUVERT

AVEC

L

ECLENCHEMENT

DE

SeCURITE

ULE.

SN

2936091)

ADVARSEL:

USYNLIG

LASERSTRALING

VED

ABNING,

NAR

SIKKERHEDSAF-

BRYDER

ER

UDE

AF

FUNKTION.

UNDGA

UDS/ETTELSE

FOR

STRALING.

Photo

1

2.

Class

1

label

This

label

is

located

on

the

back

panel.

Photo

2

ADVARSEL

Denne

merkning

er

anbragt

pa

apparatets

h@jre

side

og

indikerer,

at

apparatet

arbejder

med

laserstraler

af

klasse

1,

hvilket

betyder,

Sconce

at

der

anvendes

laserstraler

af

svageste

klasse,

og

at

man

ikke

pa

apparatets

yderside

kan

blive

udsat

for

utilladelig

kraftig

striling.

APPARATET

B@R

KUN

ABNES

AF

FAGFOLK

MED

SAERLIGT

KENDOSKAB

TIL

APPARATER

MED

LASERSTRALER!

Indvendigt

i

apparatet

er

anbragt

den

her

gengivne

advarselsmerk-

ning,

som

advarer

imod

at

foretage

saédanne

indgreb

i

apparate,,

at

man

kan

komme

til

at

udsztte

sig

for

laserstraling.

AOVARSEL:

USYNLIG

LASERSTAALING

VEO

ABNING.

NAR

SIKKERHEDSAF

BRYDER

ER

UOE

AF

FUNKTION

UNOGA

UDSATTELSE

FOR

STRALING

VAROITUS!

Laite

sisaltéa

laserdiodin,

joka

lahettaa

(nakyma-

tonta)

silmille

vaarallista

lasersateilya.

CAUTION

ON

REPLACEMENT

OF

PICKUP

The

laser

diode

in

the

optical

pick-up

block

is

so

sensitive

During

repair,

carefulley

take

the

following

precautions.

to

static

electricity,

surge

current

and

etc.

that

the

com-

(The

following

precautions

are

included

in

the

service

ponents

are

liable

to

be

broken

down

or

its

reliability

parts).

remarkably

deteriorated.

PRECAUTIONS

1,

Ground

for

the

work-desk.

3.

Grounding

for

the

human

body.

Place

a

conductive

sheet

such

as

a

sheet

of

copper

(with

impedance

lower

than

10°)

on,

the

work-

desk

and

place

the

set

on

the

conductive

sheet

so

that

the

chassis.

.

Grounding

for

the

test

equipment

and

tools.

Test

equipments

and

toolings

should

be

grounded

in

order

that

their

ground

level

is

the

same

the

ground

of

the

power

source.

Be

sure

to

put

on

a

wrist-strap

for

grounding

whose

other

end

is

grounded.

Be

particularly

careful

when

the

workers

wear

synthetic

fiber

clothes,

or

air

is

dry.

.

Select

a

soldering

iron

that

permits

no

leakage

and

have

the

tip

of

the

iron

well-grounded.

.

Do

not

check

the

laser

diode

terminals

with

the

probe

of

a

circuit

tester

or

oscilloscope.

Wrist-st

rap

Disconnection

To

solder

@

position

and

®)

position

on

the

terminal

PC

board

before

removing

the

optical

pickup.

Connection

The

optical

pick-up

of

service

part

has

a

protective

so

Ider

bridge

for

@

position.

That

must

be

removed

after

connecting

the

pickup.

Then,

remove

a

protective

to

Ider

bridge

for

®)

position.

Fig.

11

1D)

Giloketes)

PACKING

VIEW

Remote

Connection

Controller

Cord

/

Batteries

fi]

Lift

up

the

back

side

of

unit

and

return

the

pickup

to

innnermost.

Use

a

screwdriver

to

turn

the

lock

lever

(about

90°)

in

the

round

hole

in

the

direction

of

arrow.

(Clockwise)

REF.

NO.

PART

NO.

DESCRIPTION

1

29361123

Label

2

282301

Sealing

hook

3

29051749

Master

carton

box

(Black)

29051750

Master

carton

box

(Silver)

4

29095012-1

500

800mm,

Protection

sheet

5

29100105

550x680mm,

Poly-vinyl]

bag

6

29361047

Label,

sheet

7

29095572

Sheet

8

29091264

Pad

L

9

29091265

Pad

R

10

261504

Adhesive

tape

11

29110071

Damplon

tape

12

260012

Damplon

tape

13

Accesarry

bag

ass’y

29341302

Instruction

manual

2010097

Connection

cord

24140028

RC-122C,

Remote

controller

3010054

UM-3,

Two

batteries

2010169

Cord

RI

29365020

Warranty

card

29100094A

Poly

bag

for

warranty

card

29100097

Poly-vinyl

bag

29091309

Pad,

tray

panel

PARTS

LIST

REF.

NO.

Al

A2

A3

A4

A5

A6

A7

A8

A9

A10

All

Al2

Al3

Al4

Al5

Al6

Al7

Alg

Al9

A20

A21

A22

A23

A24

A25

A26

A27

A28

A29

A30

A31

A4l

Adil

A42

A43

A44

ASI

A52

AS53

ASS

AS7

AST

A58

ASO

PART

NO.

27100170A

27100169A

27130542

27130543B

27141311

27121165

27175011C

28140873

27300750

27273101A

27270278

27300833

28140903

27270214A

27270212

28133202

870060

27267558-1

27141281

830440109

834430108

834430088

831130088

834230108

834430068

838440089

27301184

27141310

27141309

28140918

27110433

27110434

28184401

28184402

838440089

834430088

28140408

1H050121

1H049121

28191477

27211045

27210988

27175153

84643008

84633008

834430088

833430080

DESCRIPTION

Chassis

U

Bracket

C

Bracket

L

Bracket

T

Back

panel

Leg

(Cushion)

Cushion

AStrainrelief

Joint,

power

Spacer

WS-2NS,

Clamper

Cushion

Spacer

Back

plate

W315,

Flat

washer

Guide

Bracket

4TTC+10C

(BH),

Tapping

screw

3TTS+10B

(BC),

Tapping

screw

3TTS+8B

(BC),

Tapping

screw

3TTW+8B,

Tapping

screw

3TTS+10B

(Ni),

Nickel

screw

3TTS+6B

(BC),

Tapping

screw

4TTB+8C

(BC),

Tapping

screw

Lock

Bracket,

rail

Bracket

Cushion

Front

bracket

ass’y

(B)

Front

bracket

ass’y

(S)

Top

cover

(B)

Top

cover

(S)

4TTB+8C

(BC),

Tapping

screw

3TTS+8B

(BC),

Tapping

screw

t3x

10x36,

Cushion

Front

panel

ass’y

(B)

Front

panel

ass’y

(S)

Clear

plate

Panel,

door

(Tray

panel)

(B)

Panel,

door

(Tray

panel)

(S)

Leg

SESH

RSEN

(BC),

Special

bolt

3HSBXx8FN

(Cr),

Special

bolt

{S)

3TTS+8B

(BC),

Tapping

screw

3TTP+8P

(BC),

Tapping

screw

REF.

NO.

PART

NO.

DESCRIPTION

A60

27270255

Spacer

A81

28323433

Knob

(B)

28323434

Knob

(S)

A82

28323152

Knob

MODE

(B)

28323435

Knob

MODE

(S)

A83

27301187

Cushion

L

P801

253148

or

A

AS-CEE

250V

2.5A,

253150

Power

supply

cord

T901

2300342

A\NPT-1004G,

Power

transformer

Ul

1H048563-1A

NAAR-3363-1A,

Main

circuit

pc

board

ass’y

U2

1H048564-1

NADG-3364-1,

Opto./digital

output

pe

board

ass’y

U3

1H048565-1

NADIS-3365-1,

Display

circuit

pe

board

ass’y

U4

1H048566-1

NAPS-3366-1,

Power

switch

pc

board

ass’y

US

1H048567-1

NAAF-3367-1,

Headphone

amplifier

pc

board

ass’y

U6

1H048568-1

NAAF-3368-1,

Headphone

terminal

pe

board

ass’y

U7

1H048569-1

NASW-3369-1,

Switch

pe

board

ass’y

Wi

260208

Binder

NOTE:

(B):

Only

Black

model

(S):

Only

Silver

model

NOTE:

THE

COMPONENTS

IDENTIFIED

BY

MARK

A

ARE

CRITICAL

FOR

RISK

OF

FIRE

AND

ELECTRIC

SHOCK.

REPLACE

ONLY

WITH

PART

NUMBER

SPECIFIED.

Oo

a

fer)

oy

3]

i)

MECHANISM-EXPLODED

VIEW

PARTS

LIST

REF.

NO.

PART

NO.

DESCRIPTION

1

1H048901

Spindle

motor

ass’y

3

27270264-1

Spacer

4

82542010

2B+10F(BC),

Binding

screw

5

24110003

DLBA2Z2001A,

Optical

pickup

6

27260286

Shaft

7

27270264-1

Spacer

8

27301129B

Plate

9

28181020

Magnet

ass’y

10

27301152

York

ass’y

11

245022364

Coil

12

28140912

Cushion

A

13

28140913

Cushion

B

14

28140914

Cushion

C

15

82542006

2B+6F(BC),

Binding

screw

16

833420068

2TTP+6B(BC),

Tapping

screw

17

831430100

3TTW+10P(BC),

Tapping

screw

18

801414

Special

screw

19

27301179

Weight

PU

21

27100166C

Chassis

L

22

28140891

Cushion

A

23

27301131B

Arm

24

29360911

Label

LASER

3

25

27180402

Spring

26

27301132A

Cap

CH

27

28181019A

Magnet

CH

28

27301133

York

CH

30

27301134

Cushion

rubber

31

27180403A

Spring

F

32

27180404B

Spring

R

33

28140860

Cushion

34

27270277

Spacer

35

27301172

Cushion

rubber

36

28180417

Spring

G

37

27301182

Cushion

L

39

28140917

Tube

41

27301124

Disc

tray

DISASSEMBLING

PROCEDURES

Top

cover

Remove

a

screw

holding

the

back

panel

and

top

cover.

Remove

the

four

screws

holding

the

top

cover

and

chassis.

Main

circuit

PC

board

Remove

the

top

cover.

Remove

the

eight

screws

holding

the

back

panel

and

chassis.

Remove

a

screw

holding

the

bracket

C

and

opto./digital

output

PC

board.

Remove

four

screws

holding

the

main

PC

board

and

chassis.

Tray

panel

Use

a

hexagon

wrench

(2.5mm),

remove

the

two

hexagon

bolt

holding

the

tray

panel

and

mechanical

chassis.

Mechanism

ass’y

Remove

the

tray

panel.

Remove

the

four

screws

holding

the

mechanism

and

chassis.

-11-

DX-6550

REF.

NO.

PART

NO.

DESCRIPTION

42

27301135

Rail

L

43

27301136

Rail

R

44

27301126

Guide

bearing

45

28140892

Cushion

T

Si

27301137B

Disc

plate

52

27301138

Cam

plate

L

53

27301139A

Cam

plate

R

54

27260280A

Shaft

55

27301140A

Stopper

56

27301141A

Plate

57

27141275

Bracket

61

27260281A

Shaft

62

27141274

Bracket

63

27270265A

Spacer

64

27270276

Spacer

65

27180418

Spring

71

1H048902

Disc

motor

ass’y

73

27301142

Pulley

gear

74

27301143A

Flat

wheel

75

27301162

Rubber

belt

76

25065322

NMS-1214,

Microswitch

77

2000888

Socket

ass’y

78

1H048559-1

NAETC-3359-1,

Terminal

pc

board

ass’y

79

27301180

Cushion

81

82143004

3P+4FN(BC),

Pan

head

screw

82

831126060

2.6TTW+6P,

Tapping

screw

83

838430088

3TTB+8B(BC),

Tapping

screw

84

834430068

3TTS+6B(BC),

Tapping

screw

85

834430088

3TTS+8B(BC),

Tapping

screw

91

28140908

Cushion

K

92

28140909

Cushion

L

93

28140910

Cushion

F

94

.

27141317

Bracket,

switch

95

834440168

4TTS+16B(BC),

Tapping

screw

96

28140911

Cushion

P

Caution:

When

disconnect

the

sockets

P101

anj

7102

on

the

main

circuit

PC

board,

solder

th:

3

point

on

the

terminal

PC

board

or

the

A

pont

on

the

pickup.

(Refer

page

6)

After

remove

the

flexible

PC

board

of

pickup

from

terminal

FC

board,

remove

the

terminal

PC

board.

DX-6550

LUBRICATION

Cam

Piste

R

Chassis

L

6902S

Cam

Plate

L

6902S

Dise

Tray

ZB

—-~

62025

On

Spacer

—12-

Dx-6550

|

-DX-6550

IC

BLOCK

DIAGRAM

AND

DESCRIPTIONS

74HCOOP

(NAND

gate)

‘74HCU04P

(Hex

inverters)

CXA1081S

(RF

Amp)

Vcc

ASYMMETRY

COMPARATOR

AUTO

(Top

View)

FOK

AMP

EFM

OMPARATOR

ays

74HC86P

(Exclusive

OR)

TRACKING

ERROR

AMP

wi

et

3

>a

Veco

4B

GA

AY

3B

3A

3Y

O

DEFECT

BOTTOM

HOLO

CURRENT

REFERENCE

RF

1-¥

AMP

(1)

©)

(2)

2)

©)

6

é

g

Ed

8

4

=

”

8

w

x

Qo

RFO

RF

O

Input

terminal

of

output

signal

of

RF

summing

16

cc

amplifier

via

the

coupling

capacitor

M51943ASL

(System

reset)

STA341M-L

(Transistor

array)

Defect

bottom

hold

output

terminal

Output

terminal

of

RF

summing

amplifier

17

Vee

Negative

power

supply

terminal

3

RF

Input

terminal

of

RF

summing

amplifier

18

FE

BIAS

Non-inversion

bias

terminal

of

focus

error

amplifier

1

ra

feedback

CMR

adjustment

of

focus

error

amplifier

Switching

terminal

of

P-SSUB/N-SURB

of

LD

4

P/N

(laser

diode)

I

19

FE

Output

terminal

of

focus

error

amplifier

5

LD

Output

terminal

of

APC

LD

amplifier

20

TE

Output

terminal

of

tracking

error

amplifier

2

8

3

74

6

=

Input

terminal

of

APC

PD

(Pin

diode)

amplifier

21

DEFECT|

Output

terminal

of

defect

comparator

Inversion

input

terminal

of

RF

I-V

amplifier

(1)

22

MIRR

|

Output

terminal

of

mirror

comparator

Connect

to

At+C

of

diodes.

Er):

8

PD2

Inversion

input,

terminal

of

RF

I-V

amplifier

(2)

23

cP

ener

terminal

of

capacitor

for

mirror

Connect

to

B+D

of

diodes.

cz

hold

Non-inversion

input

of

mirror

comparator

|

i

Connection

i

terminal

of

capacitor

for

defect

9

ve

Connect

to

GND.

24

CB

bottom

hold

NJM4556S

(Operation

ain

)

Inversion

input

terminal

of

F

I-V

amplifi

a]

eee

‘i

nversion

input

terminal

o

-V

amplifier

10

F

Connect

to

F

of

diode.

L

25

DGND

|

Connect

to

GND

Far:

.

igs

i.

11

E

Lee

eit

dies

EVrampries

26

ASY

Auto

asymmetry

control

input

terminal

eee

|

Output

terminal

of

E

I-V

amplifier

27

EFM

|

Output

terminal

of

EFM

comparator

Feedback

input

terminal

of

E

I-V

amplifier

|

:

13

El

Gain

adjustment

of

E

I-V

amplifier

28

FOK

|

Output

terminal

of

FOK

comparator

DC

voltage

output

terminal

of

(Vcc

+

Vee

y2

29

LD

or

|

ON/OFF

switching

terminal

of

laser

diode

a

i

30

Vec

Positive

power

supply

Input

terminal

from

defect

bottom

hold

output

signal

via

the

coupling

capacitor

VIDE-V07006

/

Druck

1

DX-6550

16BT-09GK

(Fluorescent

tube)

connection

NO.

r

CONNECTION

G

B1630

(Motor

Drive)

Voutl

Vout2

Pin6=NC

NJM592D8

(Wide

band

amp.)

INPUT

2

1

—E

INPUT

1

GIB GIA

cain

secect

U2]

GAIN

SELECT

vs

[3]

|

6]

vs*

OuTPUT2

[s]

OuteuT?

VIDE-V07006

/

Druck

2

T,1

16

Vop

18

T,

14T,

13co

IZAiN

11

Bin

100

9a

0222

520

el

afo}n|

ml

off

elelel

a

ECE

CET

12;11)10}9)8/7/6/5)4}3])2;1)/N/N|IN|NININ|NIN|NIN/F

G|G|G|G/G/G|G|G|G|G|G|G|

P| P| P|

P|

P| P|

P} P|

P}

P|

2

HD14538BP

(Muitivibrator)

1

F

2

Symbol

2

3

4

5

6

8

DECT

XRST

|

Reset

input

terminal.

Reset

at

the

ley

fe-vel.

14

TGU

Time

constant

terminal

for

high

frequency

gain

switching

of

tracking.

js

CXA1082A0

(Servo

Signal

Processor)

INPUT

SHIFT

REGISTERK

_'

|

ADDRESS

DECODER

TL

DATA

REGISTER

SEQUENCER

OUTPUT

DECODER

FSim4

TGir2

TMIi-7

PS!I-3

Function

No.

Defect

signal

input

terminal.

15

a,

Tracking

error

signal

input

terminal.

Tracking

zero

cross

comparator

input

terminal.

Window

comparator

input

terminal

for

ATSC

detection.

Focus

error

singal

input

terminal.

20

Insert

the

capacitor

between

this

terminal

and

21

9

when

drop

the

high

frequency

gain

of

focus

servo.

om)

Switching

terminal

of

high

frequency

gain

of

focus

servo.

3

FSET

Time

constant

switching

terminal

when

raise

the

low

frequency

gain

of

focus

servo.

Focus

drive

output

terminal.

Inversion

input

terminal

of

focus

amplifier.

Time

constant

terminal

to

make

the

fous

search

waveform.

Symbol

Function

TG2

Time

constant

terminal

for

high

frequency

gain

switching

of

tracking.

17

TAO

|

Tracking

drive

output

terminal.

Inversion

input

terminal

of

tracking

anplifier.

Non-inversion

input

terminal

of

sled

amplifier.

24

26

2

SLO

Sled

drive

output

terminal.

SL-

Inversion

input

terminal

of

sled

amplfier.

SSTOP

Limit

switch

ON/OFF

detector

signal

terminal

for

disc

innermost

position

detector.

Terminal

for

peak

of

phase

compensitionm

of

tracking

and

fo

setting

LPF.

FZC,

AS,

TZC,

SSTOP

and

etc.

sigials

are

output

by

the

command

from

microprocessor.

SENS

Cc.

OUT

Signal

output

terminal

for

count

of

tack

numbers.

DIRC

|

Use

when

jumps

one

track.

No.

}

Symbol

Function

No.

|

Symbol

Function

No.

|

Symbol

Function

No.

|

Symbol

Function

29

DATA

|

Serial

data

input

terminal

from

microprocessor.

Connection

terminal

to

terminal

MDP

of

Time

constant

switching

output

terminal

of

49

RAWE,

|

Write

enable

signal

output

to

external

RAM

40

MDP

1

FSW

!

:

; ;

CXD1125QZ.

output

filter

of

spindle

motor

30

XLT

|

Latch

input

terminal

from

microprocessor.

; ;

50

RACS

|

Chip

selector

signal

output

to

external

RAM

:

: :

41

MON

|

Connection

terminal

to

terminal

MON

of

2

MON

|

ON/OFF

control

output

terminal

of

spindle

—

31

CLK

|

Clock

input

terminal

serial

data

transmitter

CXD1125QZ.

5

motor

51

C4M_

|

Divider

output

of

crystal.

f=4.2336MHz

from

microprocessor.

pe

ce

et

[eee

: :

42

FSW

LPF

time

constant

terminal

of

CLV

servo

error

Drive

output

terminal

of

spindle

motor.

52

Vss

Ground

33

BW

Time

constant

terminal

of

loop

filter.

signal.

3

MDP

Rough

control

when

mode

CLV-S

and

phase

—

:

We

os

g

5

control

when

mode

CLV-P

53

XTAI

|

Input

terminal

of

crystal

oscillator

34

PDI

Input

terminal

of

phase

comparator

output

PDO.

44

SPDL—

Inversion

input

terminal

of

spindle

drive

fail

eA

Ics

s

amplifier.

4

MDS

Drive

output

terminal

of

spindle

motor.

54

XTAO

j

Output

terminal

of

crystal

oscillator

35

ISET

Flow

the

current

to

decide

the

focus

search,

Speed

control

when

mode

CLV-P

i

track

jump,

and

kick

height.

45

SPDLO

|

Spindle

drive

output

terminal.

55

MDi

:

: : ,

5

EFM EFM

signal

input

terminal

from

RF

amplifier

2

Mode

switching

input

terminals

36

VCOF

VCO

free

run

frequency

is

proportion

to

46

WDCK

|

Clock

input

terminal.

(88.2kHz)

57

MD3

resistor

value

between

pins

31

and

37.

;

”

6

ASY

Output

terminal

to

control

the

slice

level

of

ee

ah

+—

4

;

47

FOK

Focus

OK

input

terminal.

EFM

signal

58

SLOB

Code

switching

input

of

audio

data

output.

38

C864

|

VCO

(8.64MHz)

output

terminal.

eee

Seton

See

;

; -

Seine

En

eaas

,

Ta

48

MIRR

|

Mirror

signal

input

terminal.

7

LOCK

|

GFS

sampling

terminal

Mode

switching

input

of

audio

data

output.

zi

89...

||

BOCK:

||

Ried

miClOe

Fun

away

Prevenbon:

cxeMIe

Is

a

7

ee

—|

59

|

PSSL_

|

Serial

output

at

low

level

operated

at

low

level.

VCO

output

terminal.

8.6436MHz

when

lock

Parallel

output

at

high

level

——

8

VCOO

|

to

EFM

signal

woe

.

&

x

8

=“

Control

output

for

aperture

correction.

CXD1

125QZ

(Digital

signal

processor)

3

&

2

9

vcol

VCO

input

terminal

60

APTR

High

level

when

Rch.

(24)

10

TEST

OV

;

Control

output

for

aperture

correction.

|

61

APTL

High

level

when

Lch.

Phase

comparator

output

terminal

of

EFM

il

PDO

signal

and

VCO/2

62

DAO1

(LSB

of

parallel

sound

output)

output

{ro

=

when

PSSL

=

H.

C1F1

output

when

PSSL

=

L

SUBCODE

Q

12

Vss

Ground

—_—__

—}

SYNC

DETECTOR

DEMODULATOR

REGISTER

: :

-

63

DA02

DAOQ2

output

when

PSSL

=

H.

13

CLK

Serial

data

transmitter

clock

input

terminal

from

C1F2

output

when

PSSL

=

L.

microcomputer

—

64

DAQ3

DAO3

output

when

PSSL

=

H.

14

XLT

Latch

input

terminal

from

microcomputer

C2F1

output

when

PSSL

=

L.

Serial

data

input

terminal

from

microcomputer

65

DAO4

DA04

output

when

PSSL

=

H.

A

C2F2

output

when

PSSL

=

L.

23

BIT

System

rest

input

terminal.

C2FL

output

when

PSSL

=

L.

poe

17

CNIN

|

Tracking

pulse

input

terminal

7

;

67

DA06

output

when

PSSL

=

H.

|

{

18

SENS

Inner

condition

output

terminal

correspond

to

C2PO

output

when

PSSL

=

L.

address

68

DAO7

output

when

PSSL

=

H.

19

MUTG

|

Muting

input

terminal

RFCK

output

when

PSSL

=

L.

ERROR

DETECTOR

20

CRCF

|

CRC

check

output

terminal

of

subcode

Q

69

pAog

|

PA08

output

when

PSSL

=

H.

INSERTER

CORRECTOR

|

:

WFCK

output

when

PSSL

=

L.

21

EXCK

Clock

input

terminal

for

serial

output

of

subcode

70

DAO09

DAO9

output

when

PSSL

=

H.

=|

PLCK

output

when

PSSL

=

L.

22

SBSO

|

Serial

output

terminal

of

subcode

t

;

4

71

DA10

DA1O

output

when

PSSL

=

H.

23

SUBQ

|

Subcode

Q

output

terminal

UGFS

output

when

PSSL

=

L.

VCO

CIRCUIT

——+

—

TIMING

INTERPOLATOR

Subcode

sink

SO

+

S1

output

terminal

DA11

output

when

PSSL

=

H.

GENERATOR

72

|

DAIL

|

Grop

output

when

PSSL

=

L.

25

SQCK

|

Clock

terminal

to

read

the

subcode

Q

t-———

73

Vop

Power

supply

(5

V)

26

SQEX

27

DOTX

Selector

input

terminal

of

SQCK

DA12

output

when

PSSL

=

H.

RAOV

output

when

PSSL

=

L.

Digital

output

terminal

Indicator

output

of

lock

condition

of

frame

DA13

output

when

PSSL

=

H.

X?

TAL

CIRCUIT

TIMING

OIGITAL

FILTER

GENERATOR

Cx01130Q

syne

DA13

|

C4LR

output

when

PSSL

=

L.

(Exp

135Q

DA14

output

when

PSSL

=

H.

Data

terminals

of

external

RAM

C210

output

when

PSSL

=

L.

DAIS

DA15

output

when

PSSE

=

H.

=I

C210

output

when

PSSL

=

L.

DAI6

DA16

(MSB

of

parallel

sound

outjut)

output

when

PSSL

=

H.

DATA

output

wien

PSSL

=

L

Strobe

signal

output.

176.4kHz

wien

DF

is

on.

WDCK

|

38

2kHz

when

DF

is

off.

TRACKING

RAM

ADDRESS

COUNTER

GENERATOR

OIGITAL

OUT

(ee

38a)

Data

terminals

of

external

RAM

CxXD1135Q

Address

output

terminals

of

external

RAM

2

48

RAI1

LRCK

|

Strobe

signal

output.

88.2kHz

whn

D

F

is

on.

44.1kHz

when

DF

is

off.

VIDE-V07006

/

Druck

3

DX-6550

©

DX-6550

CXP5058H-104QZ

(Microprocessor)

__

No.

.

Symbol

VO

|--.

Descriptions

G02

ios

aids

1~12

.

a

.

ne

2

Fluorescent

indicator

tube

segment

output

terminals.

Active

high.

RE

AMP.

SERVO

SIGNAL

DIGITAL

SIGNAL

ees

fran

|

RROCESSOR

ERcroe

13~28

16G~1G

O

|

Fluorescent

indicator

tube

grid

output

terminals.

Active

high.

{

tf

{

29

SCOR

I

Sub

code

sink

input

terminal.

Leading

pulse

(75Hz)

is

input

during

play.

31

C4M

I

Reference

clock

input

terminal.

f=4.23MHz

32

RST

VO

||

Reset

input

terminal.

Reset

at

low

level

when

the

power

switch

turns

on.

Peden’

i

34

VDD

|_|

+5V

power

supply.

ReMogon

te

a

35~42

ADO~AD7

I

A/D

converter

input

terminals

for

key

input.

Ao?

:

44

SC

O

Servo

system

serial

command

clock

(CLK)

and

sub

code

Q

read

clock

(SQCK)

output

terminal.

a

45

DATA

ia

O

Data

output

terminal

of

serial

command

of

servo

system.

2

46

SUBQ

oa

Input

terminal

of

sub

code

Q.

47

SQCK

ear

Oo

Read

clock

output

control

terminal

of

sub

code

Q.

:

48

CLK

|

oO

|

Clock

output

control

terminal

of

serial

command

of

servo

system.

_|

49

XLT

O

Latch

command

output

terminal

of

serial

command

of

servo

system.

aie

—

|

50

=

PLAY

{

oO

Play

indicator

output

terminal.

Not

passe

@

51

OPEN

oO

Tray

open

operation

output

terminal.

Open

at

low

level.

+5V

62)

52

He

CLOSE

L

O

Tray

close

operation

output

terminal.

Close

at

low

level.

ae

i

53

—

MUT

oO

Audio

muting

control

output

terminal.

Muting

turns

off

at

low

level.

x

54

EMP

O

Emphasis

switch

control

output

terminal.

Active

high.

55

SENSE

I

This

terminal

is

input

the

conditions

of

servo

system

according

serial

command

of

servo

i

|

_[

system.

ei

56

FOK

I

Focus

OK

input

terminal.

This

terminal

is

the

high

level

when

focus

servo

operates.

57

IN

SW

I

Close

switch

input

terminal.

L

when

the

close

switch

turns

on.

58

OUT

SW

I

Open

switch

inut

terminal.

L

when

the

open

switch

turns

on.

tee

ae

oe

ty

59

LSR

O

Laser

diode

ON/OFF

control

output

terminal.

ON

at

low

level.

Segment

Grid

60

NRSC

OUT

oO

System

code

output

terminal.

62

NRSC

IN

I

System

code

input

terminal.

63

TIMER

PLAY

I

Timer

play

swich

input

terminal.

Time

play

at

low

level.

64

TIMER

SHUFFLE

I

Timer

shuffle

switch

input

terminal.

Timer

shuffle

at

low

level.

65~70

MODE

4, 5,

0,

1,

2,

3

I

Mode

input

terminals.

71

Vss

Connect

to

GND.

2

76

VEDP

Power

supply

terminal

for

fluorescent

indicator

tube.

(—30V)

i

77~80

o,a,

bf

To

Fluorescent

indicator

tube

segment

output

terminals.

Active

high.

|

MODE

0

MODE

2

MODE

3

|

MODE

4

SREC

SELECTOR

|

PICKUP

SELECTOR

|

NRSC

SELECTOR

KICK

SELECTOR

|

TRAY

SELECTOR

HIGH

(+5V)

|

1

sec

wait

ALPS

ONLY

(DCHG,

OSTP)

Max

128

tracks

Speed

down

Speed

const

MEMORY

ARRAY

128x

128

VIDE-V07006

/

Druck

4

BD

Gistores

0)

8D-3170-1

(DAC

unit)

Analog

positive

power

supply

Vcc

®

26

RVO_

Rch

hold

output

Opto.

drive

reference

voltage

output

VRP

2

‘

RDO

Rch

deglitching

output

Optc.

drive

voltage

divided

output

+VRD

$

7

RDI

Reh

deglitching

input

DA

converter

power

supply

DRO

@

i

RIO

——-Rch

integrator

output

Opto.

¢

‘ive

opamp.

negative

input

DRI

6

22

Ril

—

Rech

integrator

input

N.C.

a

AGND

Analog

ground

Digital

ground

DGND

b ®

VRO

DA

converter

reference

voltage

Digital

positive

power

supply

VL

Lil

Lch

integrator

input

N.C.

b

L10

—_Lch

integrator

output

System

clock

input

MCLK

Z

®

LDI

Leh

deglitching

input

16.9344MHz

|

DATA

input

DATA

@

re

LDO

Lech

deglitching

output

Bit

Oe

au

BLCK

@

6

LVO—_Lch

hold

output

®

@

-Vcc

Analog

negative

voltage

Channel

clock

input

+LRCK

44.1kHz

.

21-

DX-6550

ADJUSTMENT

PROCEDURES

Instruments

required

Dual

trace

oscilloscope,

Frequency

counter,

AF

oscillator,

Test

disc

(SONY

YEDS-18),

AC

voltmeter,

Jitter

meter,

and

Socket

P4(Part

no.

25050138)

1.

VCO

frequency

adjustment

Connect

the

frequency

counter

to

terminal

P110.

Turn

the

power

switch

to

ON.(No

load

the

disc.)

Adjust

R147

until

the

frequency

counter

reading

becomes

4322

+5kHz.

After

adjustment,

disconnect

the

frequency

counter.

1

2.

Focus

offset

adjustment

9

|

Load

the

test

disc

YEDS-18

on

the

tray

and

play

the

track

2.

GND

Connect

the

oscilloscope

or

jitter

meter

to

terminal

P109.

(Oscilloscope)

Adjust

R110

until

a

clear

trace

of

waveform

pattern

as

shown

photo

1

appear

on

the

oscilloscope.

When

the

amount

of

jitter

is

broad,

set

R110

to

mechanical

center.

(Jitter

meter)

Adjust

R110

until

the

jitter

meter

reading

becomes

minimum.(Less

than

10ns.)

After

adjustment,

disconnect

the

oscilloscope

or

jittter

meter.

Frequency

P110

counter

PLCK

+

Oscilloscope

range

Vertical

:

0.5

V/div.

Holizontal

:0.2

ps/div.

DC,

Ground:

Center

Photo

1

3.

Tracking

offset

adjustment

Connect

the

short

clip

between

TP105

and

Ground

of

digital

section.

Turn

R125

to

minimum

position.(Counter

clockwise)

Connect

the

oscilloscope

between

3

(TR)

of

P108

and

2

(GND)

of

P109.

Adjust

R108

until

the

center

of

tracking

error

signal

on

the

oscilloscope

becomes

GND

level.

Turn

R125

to

the

mechanical

center.

After

adjustment,

disconnect

the

oscilloscope

and

short

clip.

P108

TR

Oscilloscope

A

----}--GND

level

P109

Vertical:

1V/div

-

B

Holizontal

:

1

ms/div.

5

GND

DC,

Ground:

Center

A=B

Photo

2

_29—

DX-6550

4.

Focus

gain

adjustment

Set the

output

of

AF

oscillator

to

800Hz,

1~1.5Vp-p.

Play

the

track

2

of

test

disc.

Connect

the

oscilloscope

and

the

AF

oscillator

as

shown

below.

eK

bE

on

oo

-—-p--

on

&

=)

AF

Oscilloscope

z¢

oe

oscillator

2G

ao

A

A=B

B

ae

Vertical

:

0.5V/div.

Photo

3

Holizontal:

0.5

ms/div.

Adjust

R122

until

800Hz

components

of

channels

1

and

2

on

oscilloscope

become

same

level.

After

adjustment,

disconnect

the

AF

oscillator

and

the

oscilloscope.

5.

Tracking

gain

adjustment

Set the

output

of

AF

oscillator

to

1.2kHz,

1~1.5Vp-p.

Play

the

track

2

of

test

disc.

Connect

the

oscilloscope

and

the

AF

oscillator

as

shown

below.

N

oO

=

a

i

=

°°

S

a

i

[)

SE

R108

RW

RiZ2

R125

R47

TR

FO

TR

VCO

OFFSET

GAIN

OO

AF

Oscilloscope

ee

ae

oscillator

A=B

Adjustment

point

7.

DAC

power

supply

voltage

adjustment

Connect

the

DC

voltmeters

to

J347

and

TP402.

(Connect

the

DC

voltmeter

to

the

leg

of

semi-fixed

resistor

eso

og

when

TP402

is

not

on

the

pc

board.)

Photo

4

Vertical

:

0.5V/div.

(Refer

adjustment

point)

Adjust

R125

until

1.2kHz

components

of

channels

1

and

Holizontal:

0.2

ms/div.

Adjust

R505

until

the

voltage

discrepancy

between

2

on

oscilloscope

become

same

level.

TP402

and

J347

is

0.1V.(TP402>J347)

After

adjustment,

disconnect

the

AF

oscillator

and

the

oscilloscope.

6.

Opto.

transmitter

system

adjustment

Connect

the

oscilloscope

to

test

point

TP401.

Play

the

track

2

of

test

disc.

Adjust

R178

until

the

cross

point

of

data

waveform

as

shown

photo

5

becomes

on

the

top

side.

Vertical

:

2V/div.

Holizontal

:

0.2

ys/div.

Photo

5

DC,

Ground:

Center

~23—

—24-

VIDE-V07006

/

Druck

5

MAIN

CIRCUIT

PC

BOARD

—25—

VIDE-V07006

/

Druck

6

Onkyo DX-6550 User manual

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