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:

MD-MS701H2/MS702H2

—

SHARP

SERVICE

MANUAL

No.

S6842MD701H2/

MD-MS701H(BL)2

MD-MS701H(S)2

MD-MS701H(MB)2

MD-MS702H(BL)2

MD-MS702H(GR)2

MD-MS702H(GY)2

*

In

the

nterests

of

user-safety

the

set

should

be

restored

to

its

original

condition:

‘and

only

elt

Identical

to

those

specified

should

be

used.

Mi

Be

te

&

ee

“This

Serivee

Manual

is

for

the

MD-

MS701H2/MS702H2,

which

‘is

a

minormodification

model

of

the

MD-MS701H/

MS702H,

This

manual,

therefore,

describes

only

the

changed

__|points:from

the

service

manual.

Pleasa

refer

to

the

MD-

sc

MS701

H/MS702H,

service

manual

(No.

peal

cnaueaiediea

together

with

this

manual.

MD-M$701

H/MS702H

SAFETY

PRECAUTION

FOR

SERVICE

MANUAL

SPECIFICATIONS

NAME

OF

PARTS

OPERATION

MANUAL

DISASSEMBLY

REMOVING

AND

REINSTALLING

THE

MAIN

PARTS

E?-PROM

DATA

LIST

DIGITAL

EQ

SETTING

BLOCK

DIAGRAM

SCHEMATIC

DIAGRAM

WIRING

SIDE

OF

P.W.BOARD

NOTES

ON

SCHEMATIC

DIAGRAM

PARTS

GUIDE/EXPLODED

VIEW

PACKING

METHOD

(FOR

UK

ONLY)

This

document

has

been

published

to

be

used

SHARP

CORPORATION

for

after

sales

service

only.

The

contents

are

subject

to

change

without

notice.

Sle

cad:

eT

teeter

OT

oo

nl

ee

et

er

ee

MD-MS701H2/MS702H2

SAFETY

PRECAUTION

FOR

SERVICE

MANUAL

Precaution

to

be

taken

when

replacing

and

servicing

the

Laser

Pickup.

The

AEL

(Accessible

Emission

Level)

of

Laser

Power

Output

for

this

model

is

specified

to

be

lower

than

Class

|

Require-

ments.

However,

the

following

precautions

must

be

observed

during

servicing

to

protect

your

eyes

against

exposure

to

the

laser

beam.

(1)

When

the

cabinet

has

been

removed,

the

power

is

turned

on

without

a

compact

disc,

and

the

Pickup

is

on

a

position

outer

than

the

lead-in

position,

the

Laser

will

light

for

several

seconds

to

detect

a

disc.

Do

not

look

into

the

Pickup

Lens.

(2)

The

Laser

Power

Output

of

the

Pickup

inside

the

unit

and

replacement

service

parts

have

already

been

adjusted

prior

to

shipping.

(3)

No

adjustment

to

the

Laser

Power

should

be

attempted

when

replacing

or

servicing

the

Pickup.

(4)

Under

no

circumstances

look

directly

into

the

Pickup

LASER

KLASSE

1

Coe

arene

LUOKAN

1

LASERLAITE

(5)

CAUTION

-

Use

of

controls

or

adjustments,

or

KLASS

1

LASERAPPARAT

performance

of

procedures

other

than

those

specified

: ,

ee?

LASER

TRIDY

1

h

d

ra

.

Y

erein

may

result

in

hazardous

radiation

exposure

LASER

TRIEDY

14

GLASS

1

LASER

PRODUCT

APPAREIL

A

LASER

DE

CLASSE

1

PAODUCTO

LASER

DE

CLASE

|

Laser

Diode

Properties

@

Material:

GaAlAs

.

@

Wavelength:

785

nm

@

Pulse

time:

Read

mode:

0.8

mW

Continuous

Write

mode:

max

10

mW

0.5S

ake

S&S

min

cycle

1.58

—

no

Repetition

CAPTION

-INVISINEE

LASEH

AADNATION

WHEN

OFEN

AND

INTERLOCAS

DEFEATED

AVOID

EXPOSUEE

TO

BRAM.

‘VASINING

-

OSYNLIT

NING

NAR

DENNA

DBL

AX

(PENAL

OCH

SPABRAR

AR

UREOUPLADE

STRALEN

AR

FAMLM

ADVAKSEL

-USYNLIG

LASERSTRALING

NAR

DERSEL

APNE

00

SIKRERHEDSLAS

BRYTES

UMNCA

EXSECSEKING

FOR

STRALEX,

VARO!

AVATTABSSA

1A,

SUCUALUICIUS

OHITETTAESSA

OLET

ALTINA

NARS

UASERSATEILYLLE

ALA

KATSO

SATHESEN.

YANMING

-OSYNUIG

LASEXSIRALING

NAR

DSKNA

DEL

AR

GPPXAT

OCH

SPARREN

AR

URUROPPLAD,

BETRAXTA

BY

STRALEN.

ADVARSEL

-USYNLIG

LASERSTRALING

Yeu

AINING

NAR

SIKKERHEDSAFEAYDERE

2A

GE

AF

FUNIKION.

NDC

URSETTELSE

FOR

VAROITUS!

LASTTEEN

KAYTTAMINEN

MUULLA

KUIN

TASSA

KAYTTOOHJEESSA

MAINITULLA

TAVALLA

SAATTAA

ALTISTAA

KAYTTAJAN

TURVALLISUUSLUOKAN

1

YLITTAVALLE

NAKYMATTOMALLE

LASERSATEILYLLE.

VARNING

-

OM

APPARATEN

ANVANDS

PA

ANNAT

SATT

AN

|

DENNA

BRUKSANVISNING

SPECIFICERAS.

KAN

ANVANDAREN

UTSATTAS

FOR

OSYNLIG

LASERSTRALNING,

SOM

OVERSKRIDER

GRANSEN

FOR

LASERKLASS

1.

VARO

!

Avattaessa

ja

suojalukitus

chitettaessa

olet

alttiina

nakymattémalle

lasersateilylle.

Ala

katso

sateeseen.

VARNING!

Osynlig

laserstralning

nar

denna

del

ar

6ppnad

och

sparren

4r

urkopplad.

Betrakta

ej

stralen.

Precaution

to

be

taken

when

replacing

and

servicing

the

laser

pickup.

The

following

precautions

must

be

observed

during

servicing

to

protect

your

eyesagainst

exposure

to

the

laser.

Warning

of

possible

eye

damage

when

repairing:

If

the

AC

adaptor

or

batteries

are

connected

when

the

top

houising

(disc

cover)

of

the

unit

is

removed,

and

the

PLAY

key

is

pressed,

the

laser

will

light

up

during

docus

access

(2-3

seconds).

(Fig.

2-1)

During

the

operation,

the

laser

will

lesk

from

the

opening

btween

the

magnetic

head

and

the

mechanical

chassis

(Fig.

2-2).

In

order

to

protect

your

eyes,

you

most

not

look

at

the

laser

durnd

repaor.

Before

repaoring

be

sure

to

disconnect

the

AC

adaptor

and

remove

the

batteries.

Magnet

head

oi

Magnet

Head

Jr

basar

Beam

Mechanism

Chassis

Optical

pick-up

Main

PWB

Disc

motor

Optical

Pick-Up

Figure

2-1

lee

Saver

Figure

2-2

MD-MS701H2/MS702H2

FORACOMPLETE

DESCRIPTION

OF

THE

OPERATION

OF

THIS

UNIT,

PLEASE

REFER

TO

THE

OPERATION

MANUAL.

SPECIFICATIONS

@

General

Power

source:

DC

3.6

V

(rechargeable

lithium-ion

(Except

for

UK)

battery

x

1)

DC

5

V

(AC

adaptor)

AC

220

-

230V,

50/60

Hz

DC

3V:

Separately

available

battery

case,

AD-M70BC

(commercially

available,

"AA"

size,

alkaline

battery

x

2)

DC

4.5V:

Separately

available

car

adaptor,

AD-CA20X

(for

cars

with

a

12-24V

DC

negative

earth

electrical

system)

Power

source:

DC

3.6

V

(rechargeable

lithium-ion

(For

UK)

battery

x

1}

DC

5

V

(AC

adaptor)

AC

230

-

240V,

50/60

Hz

DC

3V:

Separately

available

battery

case,

AD-M70BC

(commercially

available,

"AA"

size,

alkaline

battery

x

2)

DC

4.5V:

Separately

available

car

adaptor,

AD-CA20X

(for

cars

with

a

12-24V

DC

negative

earth

electrical

system)

Power

consumption:

7

W

(AC

adaptor)

.

Output

power:

RMS;

20

mW

(10

mW

+

10mW)

(0.2%

T.H.D.)

7

Charging

time:

Approx.

3.0hours

=

(When

using

the

AC

adaptor

included

with

the

unit)

Battery

life:

When

using

two,

commerically

available,

high

capacity,

"AA"

size,

alkaline

batterles

(in

the

separately

available

battry

case}

Continuous

recording:

Continuous

racording:

Approx.

4.5

hours

Approx.

4

hours

Continuous

play:

Continuous

play:

Approx.

6.5

hours

Approx.

8

hours

@

The

continuous

recording

time

is

for

analogue

input

when

the

volume

level

is

set

to

"VOL

0”.

@

The

continuous

play

time

shows

the

value

when

the

volume

level

is

set

to

"VOL

15”.

@

The

above

values

are

the

standard

values

when

the

unit

is

charged

and

used

at

an

ambient

temperature

of

20°C,

When

using

two,

commercialiy

available,

high

capacity,

"AA"

size

batteries

with

the

rechargeable

battery

(fully

charged)

Whan

using

the

rechargeable

hattery

(fully

charged)

included

with

the

unit

Continuous

recording:

Approx.

8.5

hours

Continuous

play:

Approx.

14.5

hours

|

@The

operating

time

when

using

alkaline

batteries

may

be

different,

depending

on

the

type

and

manufacturer

of

the

batteries,

and

on

the

operating

temperature.

Input

sensitivity:

Reference

Input

level

level

impedance

Specified

|

Maximum

Load

output

|

output

level

|

impedance

Headphones

10

mW

+

32

ohms

10

mw

(-12dB)

Width:

87.0

mm

(3-7/16")

Height:

29.4

mm

(1-3/16")

Depth:

81.5

mm

(3-7/32")

MD-MS701H2:

224

g

(0.50

Ibs.)

with

rechargeable

battery

MD-MS702H2:

227

g

(0.50

Ibs.)

with

rechargeable

battery

Line/Mic/optical

digital,

microphone

(powered

by

the

main-unit)

Headphones

(impedance:

32

ohms)/

remote

control

unit

Output

level:

Dimensions:

Weight:

Input

socket:

Output

socket:

@

MiniDisc

Recorder

Portable

MiniDisc

recorder.

Non-contact,

3-beam

semi-coductor

laser

pick-up

-

ts

Stereo

2

channels/monaural

(long-play

mode)

1

channel

2

G

20

-

20,000

Hz

(+

8

dB)

Approx

400

-

900

rpm

ACIRC

(Advanced

Cross

Interleave

Reed-

Solomon

Code}

ATRAC

(Adaptive

TRansform

Acoustic

Coding),

24-bit

computed

type

Magnetic

modulation

overwrite

method

44.1

kHz

(32

kHz

and

48

kHz

signals

are

converted

fo

44.1

kHz,

and

then

recorded.)

Unmeasurable

(less

than

+0.001%

W.peek)

Type:

Signal

readout:

Audio

channels:

Frequency

response:

Rotation

speed:

Error

correction:

Coding:

Recording

method:

Sampling

frequency:

Wow

and

flutter:

Specifications

for

this

model

are

subject

to

change

without

prior

notice

‘

oom

bees

MD-MS701H2/MS702H2

NAME

OF

PARTS

Mi

Remote

Coniro!

Unit

1.

Synchro

Recording

Indicator

2.

Character/Time

Information

Indicator

3.

Record

indicator

4.

Repeat

Indicator:

5.

Random

Indicator

6.

Disc

Mode

Indicator

7.

Total

Track

Number

Display

8.

Track

Number

Indicator

9.

Battery

Indicator:

emp

10.

Headpones

Socket

11.

Hold

Switch

12.

Play

Mode

Button

13.

Volume

Buttons:

+,

-

14.

Bass

Button

15.

Display

Button

16.

Piay/Pause

Button:

»

41

17.

Stop/Power

Off

Button:

m

18.

Fast

Reverse/Fast

Forward

Buttons:

<q

/

pp]

@

Main

Unit

1.

Monaural

Long-Play

Mode

Indicator

2.

Record

Indicator

3.

Level

Meter

4.

Repeat

Indicator:

c>

5.

TOC

Indicator

6.

Battery

Indicator:

txam>

7.

Random

Indicator

8.

Track

Number

Indicator

9.

Character/Time

Information

Indicator

10.

Synchro

Recording

Indicator

11.

Disc

Made

Indicator

12.

Disc

Name

indicator

13.

Track

Name

Indicator

14.

Remaining

Recording

Time

Indicator

15.

Total

Track

Number

Display

16,

Record/Track

Mark

Button

17.

Valume/Name

Select

Buttons:

+,

-

18.

Display/Lowercase

Characters

Button

19.

Character

Button

20.

Stop/Power

Off/Charge

Button:

&

/:OFF

21.

Play/Pause

Button:

b>

Il

22.

Fast

Reverse/Fast

Forward/Recording

Level

Control/Cursor

Buttons:

ka@<d

/

>|

23.

Enter/Fast

Play/Synchro

Button

24,

Editer/Auto

Mark/Time

Mark

Button

25.

Eject

Lever

26.

Bass/Delete

Button

27.

Mode/insert

Button

28.

Microphone

Input

Socket

29.

Hold

Switch

30.

Rechargeable

Lithium-ion

Battery

Compartment

31.

Optical/Line

Input

Soket

32.

Headphones

Soket

33.

5V

DC

Input

Sokets

34,

Battert

Case

Connection

Terminals

13

14

REC

=o

st

K|TOTAL

4

60

62

oon

o

MD-MS701H2/MS702H2

OPERATION

MANUAL

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MD-MS701H2/MS702H2

DISASSEMBLY

Caution

on

Disassembly

Follow

the

below-mentioned

notes

when

disassembling

the

unit

and

reassembling

it,

to

keep

it

safe

and

ensure

excellent

performance:

1.

Take

the

battery

and

minidisc

out

of

the

unit.

2.

When

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the

machine,

be

sure

to

withdraw

the

power

plug

from

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socket

in

advance.

3.

When

disassemble

the

parts,

remove

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nylon

band

or

wire

holder

as

necessary.

To

assemble

after

repair,

be

sure

to

arrange

the

wires

as

they

were.

If

a

screw

of

different

length

is

fitted

to

the

MD

mecha-

nism

(the

screw

of

the

part

to

be

fitted

to

the

MD

mechanism

chassis),

it

may

contact

the

optical

pickup,

resulting

in

malfunction.

4.

When

repairing,

pay due

attention

to

electrostatic

charges

of

IC.

ef]

REMOVAL

ee

Bottom

Cabinet

PROCEDURE

1.

Open

the

battery

Lid.

BOW

isicconsascanst

ates

saladaaanadenpicashsad

(B1)

x4

2.

Flat

Cable

...............(B2)

x2

Top

Cabinet

1.

Screw

......cessesseeeee

(C1)

x2

Main

PWB

2.

Flat

Cable

...............(C2)

x3

Mechanism

Unit

|

1.

Lift

the

left

side,

and

remove

in

the

arrow

direction.

Caution:

1.

Handle

carefully

the

main

PWB

and

flexible

PWB.

After

removing

the

flexible

PWB

(*1)

for

optical

pickup

from

the

connector,

wrap

the

front

end

of

flexible

PWB

in

conduc-

tive

aluminum

foil

so

as

to

protect

the

optical

pickup

from

electrostatic

damage.

2.

When

removing

the

mechanism

from

the

cabinet

or

when

installing

it,

it

is

advisable

to

rotate

the

unit

lock

plate

to

lower

the

holder

section.

{A1)x1

1

.4x2mm

(B1)x1

a1

4xamm

Center

Cabinet

Top

Cabinet

(C

(A1)x2

@1.4x2mm

aa

IC.

Fae

Figure

8-1

1)x1

@1.7x2.5mm

(C2)x1

Figure

8-2

Mechanism

Unit

Figure

8-3

(A1)x1

1.4x2mm

ESD)

(B1)x1

1.4x2mm

Bottom

Cabinet

(C1)x1

@1.7x2.5mm

MD-MS701H2/MS702H2

REMOVING

AND

REINSTALLING

THE

MAIN

PARTS

Remove

the

mechanism

according

to

the

disassembling

meth-

ods

1

to

4.

(See

Page

8.)

How

to

remove

the

spindle

motor

(See

Fig.

9-1.)

1.

Remove

the

solder

joint

{A1)

x

1

of

flexible

PWB.

2.

Remove

the

screws

(A2)

x

3

pes.

and

remove

the

spindle

motor.

How

to

remove

the

lift

motor

(See

Fig.

9-2.)

1.

Remove

the

solder

joint

(B1)

x

2

of

lift

motor

lead

wire.

2,

Remove

the

stop

washer

(B2)

x

1

pc.,

and

remove

the

drive

gear

(BS)

x

1

pe.

3.

Remove

the

screw

(B4)

x

1pc,

and

remove

the

lift

motor.

Note:

Take

care

so

that

the

motor

gear

is

not

damaged.

(If

the

gear

is

damaged,

noise

is

raised

in

search

mode.)

How

to

remove

the

sled

motor

{See

Fig.

9-3.)

1.

Remove

the

solder

joint

(C1)

x

2

of

sied

motor

lead

wire.

2.

Remove

the

screws

(C2)

x

2

pes,

and

remove

the

sled

motor.

Note:

Take

care

so

that

the

motor

gear

is

not

damaged.

(If

the

gear

is

damaged,

noise

is

raised

in

search

mode.)

How

to

remove

the

magnetic

head

(See

Fig.

9-4.)

1.

Remove

the

screws

(D1).x

2

pes.

2.

Remove

the

soldering

joint

(D2)

x2

pes.

Note:

.

Mount

carefully

so

as

not

to

damage

the

magnetic

head.

How

to

remove

the

optical

pickup

unit

°

(See

Fig.

9-5.)

—

4.

Remove

the

screw

(E1)

x

7

pe.

(E1)x1

@1.7x2.5mm

Figure

9-5

\;

(A2)x3

21.4x2.8mm

Spindle

Motor

Flexible

PWB

solder

joint

os

(A1)

x1

MDMechanism

Figure

9-1

Stop

Washer

ae

2

(B4)x1

@1.4x2.2mm

Lift

Motor

=—_Lead

wire

®

(C2)x2

@1.4x1.2mm

(C1)x2

a

Mecha

Flexible

PWB

aD

Sled

Motor

solder

joint

SE*

Figure

9-3

®

(D1)x2

@1.4x1.8mm

oy

ay

ae

ar

ae

MD-MS701H2/MS702H2

@

E?-PROM

DATA

LIST

TEMP

setting

Item

display

BASS

setting

Fucus

setting

so

Sled

setting

Item

display

ADJ.

SET

setting

item

display

FAB

_

ore)

DEQ.

SET

setting

Item

display

G50.

oe

GQA_

OO

Control

setting

item

display

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a

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=

64H

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