Jvc Ca-mxg9bk User manual

JVC.

SERVICE

MANUAL

CA-MXG9BK

(Unit

No.

XL-MXG9BK)

—

a

eo

eh

OPT

GCSE

La

Dad

|

jel

DDCORVEATER

60900000

60

Vi

ayy

GIS

DIGITAL

AUDIO

Aon

manual

is

for

one

part

of

the

titled

model

consisting

of

the

plural

units

as

detailed.

|

Unit

No

Consisted

Part

ofModel

=——'|_—=—

Manual

No.

|

XL-MXG9BK

COMPACT

DISC

PLAYER

|

20436

RX-MXGIBEK

“TUNER

-AMPLIFIER

.

20434

SE-MXG9BK

S.fLA-GRAPHIC

EQUALIZER

|

20435

TD-MXGIBK

i:

|

CASSETTE

DECK

|

20437

:

|

2.

For

instruction

manual,packing

matheriais

and

accessories,

please

refer

to

the

RX-MXG9BK

(S.M.No.20434.)

3.

RX-MXG9BK

is

needed(

for

power

supply

etc.)when

servicing.

Contents

important

for

Laser

Products

+++"

gue

let

Sasa

Sein

Naha

Meee

ser

imenee

1-2

Maintenance

of

Laser

Pickup

Description

of

Major

LStg

ccerccsreeererssestersteneertetstereenes

$23

:

Replacement

of

Laser

Pickup

-rs:sssererre

eee

se

aeeeee

age

eeees

1-14

Internal

Block

Diagrams-of

Other

[Cg

vrrirecerseesetetterereeees

1-8

Block

Diagrams

crrrrrrirtststetee

eres

eeesecereee

tee

teee

se

ereteretereaeas

1-15

Internal

Connection

of

FL

Display

Tube

verses

bros

rvanes

1-9

Schematic

Diagrams

serresestttss

se

ceteceteeesaetee

ee

ereeeeeereeeeweees

4-16

Disassembly

Procedures

<-r-rersrereseeseeeeeeeeeseereeesesenernan

1-10

Printed

Circuit

Boarde:<<i-cseces

mating

tise

cacchccetteusd

sats

me

417

Adjustment

Proceduresg::-:-ss-:ceeceeeeeereeteeeeeeretaceeeearenrenne

1-12

Parts

List

cccccccecccececcet

ces

enenreeenetatetecesseeeebeneeeeseeensersanens

2-1

Flow

of

Functional

Operation

Exploded

View

of

Assemblies

and

Until

TOC

is

Read

crcreteecteceteeee

cesses

eeeeeneeeeee

1-13

Application

points

for

Grease

virescens

9-4

No.

20436

COPYRIGHT

©

1893

VICTOR

COMPANY

OF

JAPAN,

LTD.

Jun.

1993

-

XL-MXG9BK

Important

for

Laser

Products

1.

CLASS

1

LASER

PRODUCT

5.

CAUTION

:

If

safety

switches

malfunction,

the

laser

is

able

to

function.

2.

DANGER:

Invisible

laser

radiation

when

open

and

:

interlock

failed

or

defeated.

Avoid

direct

exposure

to

6.

CAUTION:

Use

of

controls,

adjustments

or

beam.

: :

performance

of

procedures

other

than

those

_

specified

herein

may

result

in

hazardous

radiation

3.

CAUTION:

There.

are

no

serviceable

parts

inside

the

exposure.

it.

Do-

i

ble

t

Li

Unit.

Repl

j

Leser

Unit.

Do

not

disassemble

the

tmver

Uni

ids

7.

CAUTION:

The

compact

disc

player

provides

a

the

complete

Laser

Unit

if

it

malfunctions.

~

Se

¢

ie

ene

laser

diode

of

wavelength

780-790nm

and

optical

4.

CAUTION

:

The

compact

disc

player

uses

invisible

.

output

power

typical

3mW

at

the

laser

diode.

laser

radiation

and

is

equipped

with

safety

switches

:

which

prevent

emission

of

radiation

when

the

drawer

is

open

and

the

safety

interlocks

have

failed

or

are

-

defeated.

It

is

dangerous

to

defeat

the

safety

switches.

VARNING

:

Osynlig

laserstralning

nar

denna

de!

r

ADVARSEL

:

Usynlig

laserstraling

ved

&bning,

nar

Sppnad

och

sparren

4r

urkopplad.

Betrakta

:

sikkerhedsafbrydere

er

ude

af

funktion.

Undga

ej

stralen.

'

+

udsaettelse

for

str&ling.

VARO

:

Avattaessa

ja

suojalukitus

ohitettaessa

olet

:

ADVARSEL

:

Usynlig

laserstraling

ved

apning,

nar

alttiina

nakymattdmialle

lasersdteilytle.

Ala

:

sikkerhetsbryteren

er

avslott.

unnga

utsettelse

for

katso

séteeseen.

:

straling.

REPRODUCTION

AND

POSITION

OF

LABELS

WARNING

LABEL

{Except

forthe

U.S.

4.)

DANGER:

_

invisible

laser

radiation

when

open

and

straling

nar

denna

del

[Interlock

failed

or

defeated.

|

&

Oppnad

och

sparren

Ar

AVOID

DIRECT

EXPOSURE

lurkoppled.

setrakta

ej

TO

BEAM,

{e)

{s}

VARNING:

Osyniling

laser-

stalen.

AADVARSEL:

Usynling

laser-

traling

ved

&bning,

nar

sikkerhedsafbrydere

er

ude

at

funktion.

Uindgdudsat-

else

for

straling.

(d}

VARO:

Avattaessa

ja

suo-

jalukitus

ohitettaessa

olet

aittiina

nakyméttdmalle

lasersatellylle.

Ala

katso

sateeseen.

tt]

CLASS

1

LASER

PRODUCT

CLASSIFICATION

LABEL

_

{Except

for

the

U_S.

A.

and

Canada)

1-2(No.

20436)

XL-MXG9BK

Description

of

Major

LSlIs

M@

=

HD404019RC135

(1C991)

:

Micro-computer

1.

Terminal

Layout

.

(2.

Key

matrix”

wer

KEY

iN

o

KEY

IN

1

KEY

IN2

KEY

IN3

KEY

kevourt

|

Wan

nwmsA

WN

=

|

KEY,

OUT.2

||

EDIT

KEY

OUT

4

MODE

FADE

REPEAT

ee

PLAY

?/

OPEN

/

STOP

/

KEYOUT7

|

pause

|

CLOSE

CANCEL

CLEAR

HD404019RCi35

3.

Description

Ra

Symbol

v0

Functions

and

Operations

Ea

Sym

bol.

lof

Functions.

and

Operations

:

fi~a

|

ao~se

JO

[FL

grid

control

output

FL

grid

control

output

|

35

|

(iso

|

O

Serial

data

eat

for

(C841

Pe

|

wo

fftsegment

contol

output

|

x

|

wo

|

[write

requert

signal

input

[eo

[

cena

[Oro

grid

contol

output

|»

|

_vow

[Ofiarer

on

signal

output

fom7p

sie

[Or

segment

contol output

|

error

[0

[Key

matrix

output

Pie

[we

]=|Non

connection

_|

»

|

rom

[0

[Power

off

signal

ovtpt___—|

Tie

von

[1

[ru

Power

suppiy

|

[eran

[0

[Graphic

mute

signafoutpot

2

a

OC

ae

a

ee

eros,

ox

Key

aks

aa

KEY

OUT3

fe

|

ow

[i

nn

a

ce

|

wid

_

input

KEY

IN3

[a

[ww

[0

fRead

Write

signal

output

Vas

[reser

7

[Reset signal

mput

Sd

|

2s

|

aoew

|

1

|

Close

switch

‘

active

low

iso

|

owe

ff

Test

mode

input

:

connected

to+

5V

|

as

|ornsw

|

1

|

Open

switch:

active

low

tr]

oser

fr

Clock Oscillation

input

Reset

switch

:

active

low

at

the

.

"RESET

SW

~

inmost

position

of

pickup

_

Clock

Oscillation

output

[ar

|

wr

|

[rest

mode

input

isi)

ta

closes

|

2s

|

cose

[0]

Close

signal

output

5s

|

Keyos

»

fO|

Key

matrix

patput

|

29

|

open

fo

Open

signal

output

}s5

|

“orm

|i

|

Compu-iink

signal

input

fo

|

or

ol

Tracking

servo

off

signal

output

ss

|“oeour

fo’

Compu-

iink

signal

output

; .

os

fa

|

ew

fol

Tracking

gain

up

signal

output

|

sx

|

ever

[ofx

Key

matrix:

Selah

Sil

es

—

ee

}

sex

LO

[Clock

output

far

IC841

-

fo[rt

and

control

gutput

[5

Teens

[fe

bettas

at

fool

ie

[ot

eto

(No.

20436)1-3

-

XL-MXG9BK

MYM7121C(IC841)

1.

Outline

YM7121

is

a

C-MOS

LSI

for

signal

processing

and

servo

control

(SVC)

in a

CD

player.

It

is

used

for

the

demodulation

of

the

EFM

signal

from

the

laser

pick

up

,

detection

/

correction

of

the

error

signal

,

signal

processing

in

digital

filtering

,

etc.

and

for

various

servo

controls

(focusing

,

disc

,

tracking

and

feed

servos).

And.

it

contains

digital

interface

which

output

the

audio

digital

signals

in

S-RAM

and

CD-

player.

This

digital

interface

matches

EIAJ

standards.

2.

Top

View

=f

a

eee

-

YM7121C

SLVL

PCO

1/2VPLL

VPLL

RV

CVCK.

VDD

VSS

IC

EFMI

Siice

level

contro!

¥Cco

rock

oneal

oscillator

rock

oneal

contral

TESTE

TEST

,D

TEST

,IN

aoe

EFMX

,

EFMX

>

<

j

Sync

detector

}

stpeton

|

code

a

SUB

,

SBSY

:

SFSY

separation

-

SYEQ

cK

EFM

demodulator

}

stpeton

|

CRC

LE

RCK

|

Disc

Servo

Poaceae

|

DM+

,DM—

go

Pee

eo

a

FCS

ck

Focus

servo

control

FZC,

FRE

[_]

¢——-——L]oin

|

DOuT

#COM

interface

es

Time

difference

Rew

r

calculation

circuit

SVOF

,

TRBK

[_]

a

|

i

wa

TROF

.TRGL,.TRHD

[1]

PscK

; .

Tracking

servo

Ld

.

pLe

anh

=n

control

-

LIS

HF,

TER

[_

|

XIN

ee

servo

FEM+

,

FEM~

,

FEOF

|

Petes

|

clock

ae

ee

}

ee

esclato

sarees

DATA,

DSY

|_|

Timing

control

1

Xrsy

;

EFM

|

ae

P

Senciueed

|

eee

|

buffer

C1,C2Error

detection

/.

a

I

;

correction

eee

processing

ag

CDROM

To~T10

[_]

>

$8,DGL,DGR

ca

|

—

RAM

aren

eae

control

a

L/R,

WDCK

SDO

,

SDSY,

2,

DTFLG

Ct

DAC

OUTPUT

INTERFACE

|_|

DF

00

sDI

LF

Hf]

DF

01

I

L

se

LI

DEP

_

diate

i

DAC

QUTPUT

INTERFACE

}——pel

J

pip

ee

re

el

|

1-4(No.

20436)

XL-MXG9BK.

4.

Terminal

Function

ee

ie

Adequate

time

constant

is

added

to

this

terminal

and

input

the

PCO

output.

This

makes

the

structure

of

clock

reproduce

circuit

by

inner

VCO

circuit.

ioe

ie

a

32

VDD

72

; :

4

TEST.

IN

5

TEST.

E

;

TEST.D

70

7

.4-DSY

8

DATA

|

9

|

cK

|

0.

|

ck

has

4.3218MHz

clock.

|

10~19

|

To~79

|

I

|

This

terminal

is

internal

RAM

test

terminal,

and

connected

GND.

|

22

|

DEP

|

©

|

De-emphasis

is

necessary

when

this

terminal

is

high.

|

23

|

DF

[OT

DIF

is

digital

audio

interface

format

output'

matched

EIAJ

‘standards.

|

24

[soo

[|

SDO

is

a

serial

signal

output

of

¢2

bit

rate

(The

MSB

puts

in

at

first.)

7

|

25

{sor

ft

|

$DI

is

the

input

terminal

of

4times

over

sampling

digital

filter.

it is

usually

connected

with

$DO.

RV

terminal

is

standard

voitage

terminal

of

inner

VCO.

And

capacity

for

stabilizing

is

added

to

this

terminal.

eg

nee

These

are

+5V

power

supply

terminals.

These

terminals

are

for

test.

This

is

the

check

output

terminal,

it:

becomes

high

when.

flame

synchronizing

signal

detected

from

EFM

pattern

coincides

frame

synchronizing

signa!

from

internal

counter.

ve

Not

used.

-”

VSS

_

Poo

Ecuae

ee

POR

0

|

na

ror

rye

Not

used.

34

j

SUB

.

After

detecting

that

SBSY

changes

from

low

to

high

by

|C991,

the

sub-code(P~W)

can

be

output

from

SUB

output

terminal

by

inputting

8

clocks

to

RCK

terminal

at

every

point

where

SFSY

changes

low

to

high.

[weknacrameamaidek

Sd

coROM

cA

Serial

data

output{Right

channel).

Serial

data

output.(Left

channel).

es

Wh?

U0/ 090

23|

58|

|

3

o=3|

aT

4

A

g

c

ow

D

Qa

wa

my

“w

This

terminal

is

connected

to

~COM.

It

is

an

input

terminal

that

carries

the

clock

signal

for

data

transfers.

: :

This

connects

with

microcomputer

and

it is

an

output

terminal

for

switching

data

transmission

mode.

it

enables

to

transmit

data

from

SVC

to

microcomputer

when

R/M

is

“L”

and

from

microcomputer

to

SVC

when

R/W

is

“H“.

;

ih

ime:

This

terminal

is

the

data

output

terminal

connected

to

«COM.

When

R/W

is

low,

data

is

transfer-

red

from

YM7121

to

«COM,

according

to

theSCK

clock

input.

(No.

20436)1-5

XL-MXG9BK:

SLVL

EFMX

rem

NT

cryiaA

1-6(No.

20436)

Function

and

Operation

-

peta

This

terminal

is

aineced

to

»COM.

It

is

a

request

signal

|

which

demands

to

«COM

inputting

the

data

transfer

(YM7121

to

zCOM).

This

ig

a

data

input

terminal

connected

to

.COM.

When

R/W

is

high,

the

data

is

transferred

from

»COM

to

YM7121

according

to

the

SCK

clock

input.

These

terminals

output

the

PWM

to

control

the

speed

of

spindle

motor.

The

speed

of

the

motor

goes

up

when

DM

+

is

high,

and

slows

down

when

DM

-

is

high:

both

terminals

can

not

become

high

simultaneously.

When

tracks

are

being

crossed

during

serches,

the

amplitude

variation

of

the

generated

HF

signal

|

ls.

samoled

at

the

zero

—

cross

point

of

the

tracking

error

signal

TER

and

the

TROF

signal

is

output.

The

level'variations

of

this

signal

turn

the

servo

on

and

off,

greatly

facilitaing

track

acquisition.

KP

+

or

-

KP

~

is

output

to

conduct

tracking,

and

TRHD

is

output

during

tracking

to

cause

generation

of

the

tracking

error

signal.

The

TRGL

signal

is

for

increasing

the

tracking

gain

after

tracking

i

is

completed.

The

FEM+

and

FEM-

are

output

as

high

speed

feed

signals,

and

FEOF

signal

is

output

for

eutang,

the

feed

servo

during

high

speer:|

feed.

TRBK

is

input

to

apply

tracking,

brake

from

outside.

TRGL

becomes

low

with

high

input

and

Soe

inner

control

signal

TBKE

becomes

high.

:

these

terminals

are

used

tor

controlling

the

focus

servo.

The

FCS

is

for

a

leading

signal

of

Focusing

;

the

signal,

generated

shia

the

focus

point

is

achieved,

terminate

the

focusing

operation;

and

FCO

flag

is

Crores

unite

fray

‘by

FRF

signal

generated

when

reflected

light

is

detected.

;

YM7121

needs

initializing

when

power

supply

turn

on.

_tC

will

be

low

more

than

400zs

since

XIN

is

input

clock

with

VDD

standard.

Amplitude

limited,

mutually

anti-phased

signals

are

output

from

EFMX

and

EFMX.

Slice

level

is

controlled

by

these

signals

and

external

amplifier.

SLVL

is

output

amplitude

:

alteration

component

of

both

terminals.

When

integral

circuit

is

connected

to

external,

YM7121.

|

easily

can

control

slice

level.

-

This

terminal

is

input

EFM

signal.(1~

2

Vpp)

This

terminal

outputs

the

phase

difference

when

the

polarity

of

the

ciock

and

the.

EFM

pattern

_

changes.

_

This

terminal

is

input

DC.

velage

matched:

VCO

free

run

eee

(17.

2872

MHz)

This

terminal

outputs

a

half

of

VPLL

input,

and

capacity

for

stabilizing

is

added

to

this

terminal.

XL-MXG9BK

~

WEJCE4501(1C873)

:

D/A

CONVERTER

oe

1.

Outline

2.

Terminal

Layout

_

The

JCE4501

is

a

CMOS

digital-analog

WDPOL

1

converter

with

independent

left

and

right.

&

BeeEe

é

hae

.

RSTB

3

channels.

It

was

developed

for

PCM

CLKSEL

4

digital

audio

equipment.

t

features

pulse

TEST

5

edge

modulation

(PEM)

and

Victor

COM

6

advanced

noise

shaping

(VANS)

for

NSUB

7

resolution

equipment

to

20

bits(0-20kHz)

gach

-

and

a

low

distortion

ratio.

At

JVC,

this

XOUT

10

type

of

digitai-analog

converter

is

called

a

-

pvss

11

DD

converter.

.

NC

12

AVSS

13

OUT2C

14

OUT2B

15

AVDD1

16

AVDD2

17

QUT2D

18

OUT2A

19

AVSS2

20

3.

Block

Diagram

:

CKO3

CKO2.

CKO1

XOUT

XIN

By}OUT

IC

Ba]OUT

1B

DIN1

[ANALOGELOCK

b3]

OUT

1D

i)

POUT

1A

oe

RS]OUT

2A

pck

2

OUT

2D

15]

OUT

2B

Fa]

OUT

2C

WDPOL

BSEL

CKSEL

TEST

STM_

RSTB

4.Description

Fc

7

[wore]

|

Worddata

polarityswitchingpin

(|

21

|

Avss3

[=|

Analoggroundpin3

ase

TTL

aCOMDSbaP

Tormatl:

YMB4iAtormat

[22

[ouTia[O[__Notued

SL

resetpin

(owactvey

|

23

[ourio

Jo]

10

Pemourputpin

unset

TT]

seis

mode

38a%mode

|

20

favons

||

_

Aniog

power

supplypin3__—|

5

|

test

[1]

Testmodeswitchingpin

(|

25

|AVoba|--[_—Analogpowersupplyping

|

-e

Tom

|]

com

board

vottege

fastening

pn

|

26

,ouTre

[o|

Not

used

=]

SUB”

[|

Siicon

board

vokage

fastening

pin]

27

[ouric

||

____ePeMoutputpin__———

Hs

[ovoor

|=

biaital

powersupply

pint

|

28

[avssa|-[

Analog

groundping_—___—

rep

xn

[op

Tost

ne

Te]

Toground

|

10

|

xouT

||

-

(30

|

ckO1

Jol

Clock

outputpin

1(384fsoutput)

11

[

Dvsst_|

--|

rai

[ovss2

[-

[|

Cigitalgroundpin2

hey

nef

S

Foground

[32

|

exon

[ol]

Clockovtput

20.92%

ovtpuay

Hs

Pavsst

[=]

Analog

ground

T'33

|

cxo3

[Oo]

Clock

output

3032845

output)

:

ouT2c

fo|.

2C

PEM

output

~[3a[pvpp2|-[

_Digitalpowersupplypin2_—

|

ourze

[Oo

—CSNotused

SSCS

|

NC

[-[

|

Nonconnection

"|

ee

AVDD1

(i

Racecar

Ge

eke

geen

switching

H:

stereo,L:left

channel,reversed

polarity

left

channe!

i

|

Analogpowersupplyping__—'|

37

|

_DINT

[1

|

Leftchannel

18-bits

@Fsserialdatainput

_|

Analog

ground

2

|

40

|

WDCK

Word

clock

input

a

is

Fs

efial

data

Pot

20

PeMoutputpin

[38]

“BIND

[|

Right

channel

16-bit

BFS

serial

data

input

rourza

To]

Noted

da

[ck

fe]

Bitctockinputpin

si

i

input

(No:

20436)

1-7

XL-MXG9BK

Internal

Block

Diagrams

of

Other

ICs

HE

M5218AL

(IC

762,781,803)

i

STA341M

(iC761)

:

Motor

Driver’

M5218AP

(IC

871)

:

Dual

OP

Amp.

,

mage

eg

ea

ttn

Sh

es

Pete

a

taentaltey

Sot

:

(“ns

CT

Fs

,

M5218AL

si!

Hi

!

f

M5218AP

|

Sr

!

e

«

4

I

t

:

}-

a

|

t

I

1

i

H

:

;

1

t

!

l

t

|

I

!

t

!

1

E

z

1

a

eee

Boe

A

®

Sook

“vec

ONT)

IND

IN3

-VCC

OUT3 OUT2

=

-OUT1.

OUT

-IN

+IN

Vss

+IN

=e

OUT

Vcc

A

B B

Ml

XRA10339

(IC802):

Comparator

WM

L0725

(IC801)

:

Dual

OP

Amp:

BA10339

Co

ete

SGN

Pee

ye

Oa

a

ae

ee

1

f

TLO72S

1

me

4

uae

:

é

:

1

?

a

1

(6

A.

||

|

a

|

:

1

eee

ee

cee

a

ey

eo

ee

a

+Veo

OA

A A

—-Vcc

B B

Bo

+

Vee

OUF

-IN +IN

+iIN

~-IN

OUT

Mi

M1280

(P.Q).

:

1€992

RESET.

IC

Pea

ea

ee

ne

ea

;

:

;

Yop

\

Reference

i

: P

i]

Voltage

i.

he,

Ss

:

Functi

:

“Canveld

f

Reset

‘signal

aaa

tow

level

is

output

when

|

!

-

resetting

;

:

!

:

High

level

is

output

when

cancelling

the

I

_

reset:

1

i

,

L

j

1-8(No.

20436)

XL-MXG9BK

Internal

Connections

for

the

FL

Display

Tube

a

ELU0001-140:(FL991)

1.

Grid

Layout

{

EDIT)

"PROGRAM

j

RANDOM

-

FADE

REPEAT

[2-3]

ai

NONSTOP.

|

AUTO

PRGM

MULTI

2.

Connections

er

A

[

atseraove

[71

[1

[wr

|

wr]

ne[we

[ne

[wc]ne

[nc]

ne

[vc

]we]

wc

]ue]we]wc

[ro

or

[ro]

s

[ra

a

[renmiwai

no]

24] 25] 26]

27

]26]

29]

50]

>"

[22

[9

24]35

[5627

[20

[9[["

[2/8]

|]

[necroroos

[rai

[ne

|s6f2c]36

+s]

r9[s6[ce[]ac

sefoefchiefwrlo

[rere]

|

[|

(Note)

F:Filament

-G:Grid

NP:NoPin

NC:NoConnection

P1~P9:

Anode

3.

Anode

Connedion

Table

Per

tare

rete

ee

Ee

WE

SEN

[a

[amotm>[

>

[x]

tote

b>

be

fale!

f=

momen

fee

Po

ff

fo

poof

|

«fet

[ete

[ole]

ow

fooler]

TT

Prom

fo

a

Pepe)

mar

0

(oo)

eee

MER

as

>

ss

ows

Por

==

2

a

IE}

é

4

(No.

20436)

1-9

XL-MXG9BK

Disassembly

Procedures

—

1.

Removing

the

top

cover

(1)

Remove

the

2

screws

on

both

sides

of

the

top

_

cover

and

the

4

screws

on

the

rear

side.

{2)

Gently

spread

both

sides

of

the

topcoverto

the

outside,

lift

up

the

rear

section,

and

remove

the

top

cover.

-

2.:

Removing

the

tray

”

(1)-Remove

the

top

cover.

_

(2)

Switch

on

the

power

of

RX-MXG9BK

.

Press

the

OPEN

/

CLOSE

switch

to

bring

the

tray

forward

and

with

the

tray

forward,

switch

off

the

power.

(3)

Remove

the

screw

on

the

tray

®.

(4)

Pull

the

tray

toward

the

front

to

move

it.

Note

If

the

power

r

does

not

come

on

due

to

breakdown

or

the,

insert

a

Philips

screwdriver

"

———_-PBO2,PBOS

p90

through

the

hole

at

the

bottom

of

the

front:

panel

and

turn

it

counter-clockwise

to

bring

the

tray

forward

@.

3.

Removing

the

front

panel

assembly

1)

Remove

the

top

cover.

1

é

Remove

the

connectors

(P901)

connecting

with

Sawn

PSD

main

P.C.

Boards.

(3)

Remove

the

screw

©

(4)

Remove

the

3

hooks

©

to

remove

the

front

panel.

.

Clamp

assembly

4.

Removing

the

mechanism

assembly

(1)

Remove

the

top

cover

.

(2)

Remove

the

tray

.

(3)

Remove

the

connectors

(P801,

P802,P803)

.

(4)

Remove

the

2

screws

®

holding

the

clamp

assembly,

then

remove

it.

{5)

Remove

the

3

screws.

®

holding

the

mechanism

Mechanism

assembly

assembly.

;

me

.

1-10(No.

20436)

7.

Removing

the

Laser

Pickup

1}

Remove

the

metal

cover,

tray

assembly

and

the

clamp.

2)

Remove

the

screw

©

from

the

Mecha

Base

assembly.

3)

Remove

the

Mecha

Base

assembly

from

the

rubber

cushion

@@.

4)

Movethe

Shaft

stopper

from

the

rest

position

to

the

left

side

©.

5)

Remove

the

Pickup

Shaft

from

the

Mecha

Base

assembly.(Slide

the

Pickup

shaft

to

the.

up

side@)

6)

Remove

the

CD

Pick

Unit

with

the

shaft.

8.

Installing

the

Laser

Pickup

(See

page

1-14)

(See

page1-15(Before

installing

the

pickup)):

1)

Connect

the

Flat

wire with

the

connectors

of

.

APC

(Automatic

Power

Control)

P.C.Board.

2)

While

installing

the

@

in

the

CD

Support,

set

the

shaft

on

the

base

hook®.

3)

Install

the

Mecha

Base

assembly

to

the

rubber

cushion

@@.

Shaft

stopper

Turn

A:

9.

Removing

the

spindle

motor

1)

Remove

the

Mechanism

assembly.’

2)

Remove

the

turntable,

and

remove

the

two

screws

retaining

the

spindle

motor.

3)

Remove

the

screw

retaining

the

spindle

and

the

Feed

Motor

P.C.

Board

and

unsolder

it.

10.

1).

2).

3)

XLIMXG9BK’

yA

Spindie

motor

retaining

screws

Turntable

ristalling

the

eanals

motor

Tighten

the

2

screws

to

the

same

torque.

,

Fasten

the

Spindle

and

the

Feed

Motor

P.

C.

Board

with

the

screw

and

solder.

A

Install

the

turntable.

When

installing,

press

_

straight

down

at

the

center

of

the

turntable

_until

the

distance

from

the

surface

of

the.

4)

mechanism:

base

to

the

top

of

the

turntable

is

ore

19.

42

0.

imm.

After

insertion

is

complete:

bond

the

motor

-

shaft

and

turntable

together

(at

the

section

»

marked

by

an

arrow

in

1

the

figure

o

on

the

left

-

below).

:

5)

Use

“LOCKTITE”

#460

botaings

agent,

and

apply

as

little

as

possible.

Take

care

not

to

allow

any

excess

bonding

agent

to

get

onto

the

turntable.

Be

extremely

careful

not

to

allow

bonding

agent

to

adhere

to

the

motor

bearings

(the

section

marked

by

an

allow

in

the

figure

on

the

right).

(No.

20436)1-11

XL-MXG9BK-:

eee

Procedures

FRONT

SIDE

Re

ees

cD

MECHANISM

|

tee

a

ASS

;

fo

ABZ.

=

TE

GAIN:

-

ADJ.

TPS

oo

RF

TP?

&e@

GND

TPE

&-o

TPS

OO

TEST

PRY

eee

TP4

oe

TRHD

Ki)

R865

oo

W614

GND

PLL

-

OO

W662

TPT

CK

AAD

a

ENN-346-1

SS

SSS

SS

*

Use

RX-MXGSBK

when

adjusting.

1.

PLL-

free-running

adjustment

1)

Measuring

instrument

Frequency

counter

ae

Adjusting

procedure

-

.

-

(1).

Connect

a

frequency

counter

with

TP1

(CK:

W662)

and

W614

(GND).-on

the

main

PC

board

.

Q

Adjust

R865

for

setting

the

frequency

counter’

$

vale

becomes

4.

295

+0.

O05MHz.

2.

Tracking

gain

adjustment

1)

Measuring

instruments

!

Oscilloscope,

Norma!

disc

..

'

2)

Adjusting

procedure

;

(1)

.

Connect

an

oscilloscope

with

TP6

(TE)

and

TP7{GND)

on

the

main

PC

board.

(2)

Play

adis.

.

_

(3)

Short

circuit

TP5

(TEST)

to,

1P7

(GND).

4)

Adjust

R825

for

setting

tracking

error

signal.

becomes

2.0

Ve.

p.

3.

‘Tacking

offset

adjustment

“~..1)

Measuring

instruments

-

Oscilloscope,

Normal

dise

—

2).

Adjusting.

procedure.

- .

a,

Connect

an

oscilloscope

with

TP6(TE)

and

TP7

(GND)

on

the

main

PC

Beale

(2)

Play

adisc.

...

Re

Q).

Short.

circuit

TPS

(TEST).

to

TP7

(GND).

(4)...

Adjust

R829

for

ete

the.

De

level

of

the

ee

error

(off

set)

becomes

0.

1-12(No.

20436}

XL-MXG9BK

Flow

of

Functional

Operation.

Until

TOC

is

Read

Does

REST

switch

:

L

turn

on?

Check

Points

é

.

4

a

+

The

voltage

of

S

of

P802

must

be

OV.

m

Time

Chart

of

focusing

FCS

fall

to

‘

OV

when

detect

the

0

738

Check

if

the

37

of

IC991

onthe

front

PC

board

is

+

5V

to

be

fed

to

the

pickup.

]

q734®

2

Focus

drive

1c801

&

Focus

error

:

Pe

eee

de

a

+5V

Fze

icga2@)

0

.

Check

if

the.

pin53-of

IC841

on

the

main

PC

board.

+5¥

to

be

-

fed

to

the

spindle

motor.

-

FRF

“ob

1cen2@

9

‘Disc

starts

to

rotate.

@

When

the

lens

moves

up

and

down

in

a

2-

seconds

interval,

FZC

is

not

output.

©

When

the

lens

moves

up-and

down

in

less

than

i-second,

FRF

is

not

output

or

the

focus

servo

loop

is

abnormal.

Fig-1

When

the

eye

pattern

-is

not

output,

check

the

“RF

amp.

When

the

eye

pattern

is

not

clear,

adjust

the

PLL

free-

running

frequency.

oo

|

Tracking

error

waveform

at

TOC

reading

;

Normal

=

pisctobe

°

~

—

Ss

a

tracking

+

_braken

to

stop

Check

if

pin54

of

1C841

on

the

main

PC

-board.is

.+5V

to

be

Disc

starts

TOC

reading

fed

te

the

spindle

motor,

.

to

rotate

+.”

finishes

@

When

the

tracking

loop

does

not

turn

ON,

|

check

the

tracking

offset

and

align

it

to

0.

oe

:

Check

if

pin37

of

C991

|

on

the

front

PC

board

is

OV..

oo

Fige2

(No,

20436)1-13

XL-MXGOBK

Maintenance

of

Laser

Pickup

1.

Life

of

the

laser

diode

When

the

life

of

the

laser

diode

has

ten:

a

toliowing

symptoms

will

appear.

{1)

The

level

of

RF

output

(

EFM

output:

ampil-

tude

of

eye

pattern)

will

be

low.

(2)The

drive

current

required

by

the

laser

diode

will

be

increased.

In.

such

a

case,

check

the.

life

of

the

lier:

—

diode

following

the

flowchart

below

fs

RF

output

more

than

1.5

Vp-p?

Is

the

laser

diode

drive

current

less

than

120

mA?

Replace

It

2.

Measurement

of

laser

diode

drive

current

Replace

the

jump

wire

(W641)

shown

below

with

the

resistor

(1G).

as

Measure

the

voltage

across.

the

resistor

with

a

milli-voltmeter.

When

the

voltage

is

more

than

120mvV,

it

shows

that

the

life

of

the

laser

diode

.

hae

ayvnivrnd

igs

SAPTES

<—

SIDE

PCB

nas

e

DC

MILLI-VOLTMETER

3.

Semi-fixed

resistor

on

the

APC

PC

board

-

The

semi-fixed

resistor

on

‘the

APC

printed’

circuit

-

board

whith

is

attached

to

the

pickup

is:

used

to

-

adjust

the

laser

power,

Since

this

adjustment

should

be

performed

to

match

the

characteristics

of

the

whole

optical

block,

do

not

touch

the

semi-fixed

resistor.

".

if

the

laser

power

is

lower

than

the

specified

value,

the

laser

diode

is

almost

worn

out,

and

the

laser

pickup

should

be

replaced.

;

lf

the

semi-fixed

resistor

is

adjusted

while

the

pickup

is

functioning

normally,

the

taser

pickup

may

be

damaged

due

to

excessive

current.

1-14{N6.

20436)

Replacement

of

Laser

Pickup

—

Turn

off

the

power

switch

of

RX-MXG7BK

and,

disconnect

the

power

cord

fram

the

AC

outlet’,

then

disconnect

the

system

connector

Replace

the

pickup

with

a

normal

one.

(Refer

to

“Laser

pickup

Removal”

on

the

Plug

in

the

system

connector

and

the

AC

cord

of

RX-MXG7BK

,

then

turn

the

power

switch

on.

At

this

time,

check

that

the

laser

emits

for

about

3

seconds

and

the

objective

lens

moves

up

and

down,

|

Play

a

disc,

and

when

it

starts

rotating,

short”

circuit

between

TPS

(TEST)

and

TP7

(GND).

Adjust

tracking

gain.

©

Adjust

tracking

offset:

~

Disconnect

TPS

{TEST}

from

TP7

(GND).

Check

the

éye-pattern

at

the

TP8

(RF)..

:

Finishes

Note

:

Since

one

adjustment

may

affect

other

settings,

repeat,

these

adjustments

a

few

times.

:

Before

installing

the

pickup

Unsolder

the

part

@,

which

is

used.

for

countermeasure

for

static

electricity.

XL-MXG9BK

Block

Diagram

hozt

HAED-SA

JO

ARES

XW

“Xa

OL

www

nn

wee

em

nm

nmr

sere

ee

eS

66d

OP1-L000N13

16613

SELIHELOVOYGH

L6631°

766D 2660

13$38

ANTINJWIOD

I

a

fc

“cen

S665~L265

£660

ea

|

t

$6621

XIV

ADA

WHEDSA

OL

azie

=

=]

|

196d

SS

ee

a

ee

ie

ee

2202,

Zr

Ag+

:

God

Vd

WMAGE

OFA5

“AU

AD

BNSADY

ASS“ASSS

Andie

3093

ans,

WIDIIS

Qin

12720

BIVIMILNI

TW

LIOIG

ONV

YITIOULNOD

"WOSSIDONd

TVNDIS

40ND

iniad

2NIG

oa

NOM

¥

7

SITLEWA

A

Fg3}

Loser

zi

Idd

eee

eye

meee

ee

eee

ee

106d

Ppa

ee

Se

ee

Te

ee

ae

eae

ay

ee

2Law

rye)

¥OLOW

SNIGYO)

OAw3S

4334

HOLA

06d

3SO1I/NAdO

Nl

ae

AN

|

zeee

HOLES

453u

Wid

OAUZS

FIONIdS

:

YOLOW

FIONIds

J

3)

=

YOLOW

C334

YO1IILIG

IdGOTIANS

a

oi

g<>

1

sdad

AOuL

pda

ane,

sod

fav

LasdsOUL

Buaxwooteyses

'

L-OPE-NNA

pred

z

foto

ocoe--

hs

ee

ree

et

a

tn

ee

oe

ee

aes

oe

wl

(No.

20436)1-15

e

:

a

. : .

a

‘

vo

.

‘

'

PBi018

SYMBOL

NO.

284810

28A810

28C805

28A762

2801431

281431

1N4448

IN4448

svo2

sv02

0.5A

0.5A—

SPECIFICATIONS

Power

Output:

180

watts

minimum

continuous

per

channel

into

8-chm

loads

both

channels

driven

at

any

frequency

from

20Hz

to

20,000Hz

with

no

more

than

0.05%

total

harmonic

distortion,

Rated

I.M.:

no

more

than

0.05%

(180W/ch,

60Hz

:

7KHz

=

4

:

1)

Frequency

Response:

3

-

100,000Hz

c

1dB)

‘Input

Sensitivity:

1V

(8-ohm,

180W/ch,

1KHz}

Input

Impedance:

50K

ohms

Residual

Hum

§

Noise:

-108dB

Crosstalk:

-

better

than

90dB

(vol.

max.

iKHz)

_

better

than

70dB

(vol,

max

20KHz)}

Dimensions:

485(W)

x

390(D)

x

175(H}mm

(19-1/8"

x

15-3/8'"

x

6-7/8")

Weight:

Net

28Kgs

(62

lbs.)

Gross

31Kgs

(68

lbs.)

Specifications

and

appearance

design

subject

to

possible

change

without

notice.

XL-MXG9BK

Notes:

Schematic

Diagram

1.

indicates

+B

power

supply.

WT

uner

Section

2.=--=--

indicates—B

power

supply.

3.

indicates

main

signal

path.

4.

When

replacing

the

parts

in

the

shaded

are

(

)

and

those

marked

with

A,

be

sure

to

use

the

designated

parts

to

ensure

safety.

5.

The

design

and

contents

are

subject

to

change

without

notice.

en

eeeanenee

rorere

sera

erenemereneeemnemac

one

IEE

a : ;

-

oar

opie

aay

ay

—

961

|

ov

R967

25021445

(v,

WI

+oK

OPTICAL

DIGITAL

OUT

tere

mua

cesg

cest

||

na

022

*

R903

|

R05

ssi

BOR

3

Rsos

ee

PP

tobe

ABT

to

3338

u

Rav7s

287

e

1

6.8K:

ert

eu

Race

PUL

I,

2)

ses"

PROVIDED

Sly

—*

<}+jonty

FoR

eg

U,

UT.

US

les22}

8

*

a

ae2

oas2

D896

+f

*

EP

704

10764

7

srfgialas

CONTROL-C

+4.

8V:

ream

ped

ee

(H

‘Ut

Savy

|

FROM

CONNECTOR~C

OF

UNIT

RX-MXG9IBK

412v.

250864

25876

‘17

eP708

cae

0.047

|

uy

6747

10761173

STAAIM(A)

74

inant

ay

2501

Sere,

Fy

A800

R799

Bu

PRES

(17400

Ming

*

MARK

woe

|

F

WUT

us)

|

Gass,

ere

H

(G,

GI)

c951] 0.074

0.04

NONE

C952]

0.01

NONE

R925

f

1K

NONE

|

NON

mates

Shey

O16

Tere

=

R927

NE

A

‘

7

e

:

Roe.

68

NONE

°

3}

eee

ees

ct

tices

|]

|

Be

|

Be

vee

tat

Nd

Ree

eee

ect

bre

?

,

=

rare

R966

|

‘

Dssi

|

6ap

NONE

ve

H

0892]

68P

NONE

x

!

Oeee

lassitg}

NONE

|

NONE

ECKOBOA

saa

wR

san

D902

t

Tal

wil

SF

37,

asa

|

P967]

USED NONE

NONE

te

toa]

Shoat

Pod

\

cas7[

680P

|

680P

|

0.001

Ea

Sf

cen

Pio

\

Cees] 6380P

6so0P_

[0.001

rags

a

skits

|

cess]

680P

|

6s0P

[0.0018

:

bs

ae

Gee

Geet

1

cago}

680p

|

680P

|0.0018

ae

ar

Piowibine

a

!

cga1{

150P

|

150P

120P

an

R

EF EF

cea2{;

150P

|

1560p

120P

—<———)

a

eS

TSJSs

;

C901

|

NONE

|

0,012

Ll

A

OA

C902]

NONE

|

NONE

|

0.012

Ll

nevor

el

Let

ot

|

RSi1{__220

220 180

L

O4

@4

Ot

a

\

R912,

220

180

sega

ee

i

safe

a

es

C8271

cep

NONE

|

NONE

tes)

C926

Fall

Ze

1

!

ge

aE

ore)

|

BREA

Re

ae

{

—

a

Ue

Ll

Lal

-

j

ial

—<

wee

ead

—<

ey

@s03

t

ciesot

J

ENA

64)

1

C8771

NONE

_|

NONE

7

8p

i

1

io]

—<

caw

ccs

ere

seas

|

sate

|

S82

1

R96)

27

56

{

watt

os

e

cup

>——

TRACKING

SERVO]

ae

ed

wd

H

K601

NONE

€Nz8101~007T

val

“a

i

tr

[eo

abe

Sots

Teste

faa,

H

C875

|

NONE

5P

A

Jemeosppisrs

1

'

|

A

t

A

M<KEvOE:

ae

&.

i

|

*

Gerth

ys

;

4,

ey

ie

i

ce

s971~905

!

espono?—osez,

1

bia

geo

Be

eee

ee

eth

Se

SS

ee

I

Be

Yh

he

I

28,

Me

ene

a

eee

A

B

C

D

—

E

F

G

(No.

20436)

1-16

XL-MXG9BK

Printed

Circuit

Board

BBE

MW10279—-006

ENN—346

SCN

Oe

ea

cea

Pence:

Hi

pete

1-17(No.

20436)

XL-MXG9BK

PARTS

LIST

Note

:

All

printed

circuit

boards

and

its

assemblies

are

not

available

as

service

parts.

Contents

General

Exploded

View

and

Parts

List

........

0...

0.

ccc

cee

eee

cee

eee

e

een

e

eee

2-2

CD

Mechanism

Ass’y

and

Parts

List

...........

2.02

c

cece

eee

eect

teen

wees

2-5

Printed

Circuit

Board

Ass’y

and

Parts

List

.........

0...

2c

ccc

cece

ee

eee

e

ee

eee

2-7

MIENN-346[

]CD

PC

Board

Ass'y

22.2.0...

2c

cece

eect

e

ence

cece

nnn

cet

eneeeenes

2-7

JVC CA-MXG9BK User manual

Popular Stereo System manuals by other brands