Sony M-527V User manual

SERVICE

MANUAL

Tape

CMICROCASSETTE)™

(normal

position

type)

Recording

system

2-track

1-channel

monaural

Speaker

Approx.

3.6

cm

(1%e

in.)

dia.

Tape

speed

2.4

cm/s

('%e

ips),

1.2

cm/s

(2

ips)

Frequency

range

250

-

4,000

Hz

Output

Earphone

jack

(minijack)

for

8

-

300

ohms

earphone

Power

output

160

mW

(at

10%

harmonic

distortion)

Battery

life

(recording)

SONY

SUM-3

(NS)

5.5H

SONY

ALKALINE

AM3

(N)

14H

Power

requirements

*

Two

R6

(size

AA)

batteries:

3

V

DC

*

Sony

AC-E30M

AC

power

adaptor

(not

supplied):

220

V

AC,

50

Hz

(European

model)

120/220

V

AC,

50/60

Hz

(model

for

other

countries)

*

Sony

DCC-E130L

car

battery

cord

(not

supplied):

12

V

car

battery

US

Model

Canadian

Model

AEP

Model

E

Model

UK

Model

Tourist

Model

VOR

VOICE

GPERATRD

ARCOROING

iM

MICROCARSSET

TE

«

atta

Model

Name

Using

Similar

Mechanism

NEW

Tape

Transport

Mechanism

Type

MZ-425-14

SPECIFICATIONS

Dimensions

(w/h/d)

Approx.

66.7

x

120.8

x

25

mm

incl.

projecting

parts

and

controls

Mass

Approx.

180

g

incl.

batteries

Supplied

accessories

Microcassette

tape

MC-30

(1)

(AEP,

UK)

R6

(size

AA)

batteries

(2)

(Tourist)

Carrying

case

(1)

(tourist)

Design

and

specifications

are

subject

to

change

without

notice.

MICROCASSETTECORDER

SONY.

SERVICING

NOTE

Flexible

Circuit

Board

Repairing

Notes

on

chip

component

replacement

@

Keep

the

temperature

of

the

soldering

iron

around

@

Never

reuse

a

disconnected

chip

component.

‘270°C

during

repairing.

@

Notice

that

the

minus

side

of

a

tantalum

capacitor

may

@

Do

not

touch

the

soldering

iron

on

the

same

conductor

be

damaged

by

heat.

of

the

circuit

board

(within

3

times).

@

Be

careful

not

to

apply

force

on

the

conductor

when

soldering

or

unsoldering.

SECTION

1

This

section

is

extracted

from

GENERAL

instruction

manual.

e

Parts

Identification

EAR

Microphone

FAST

TAPE

im?

|

\.

tome

PAUSE

ie

'

44

CUE/REVIEW

b>

|

m4

VOR

SECTION

2

DISASSEMBLY

Note:

Follow

the

disassembly

procedure

in

the

numerical

order

given.

CASSETTE

AND

BATTERY

LIDS

P

ront

cabinet

(A)

®

Stop

the

cassette

lid

(B)

halfway.

precision

screwdriver

or

equivalent

lid

(B)

cassette

lid

(B)

precision

screwdriver

or

battery

case

lid

CABINET

battery

terminal

(a)

battery

coil

spring

(c)

we

battery

coil

:

spring

(b)

fu

@

B7P1.

~@

@

Push

knob

(PAUSE-A)

e

Rae

\

ax

|

J

from

inside

to

out

side.

®

cabinet

@

knob

(PAUSE-A)

@

knob

(FR)

MECHANISM

DECK

cabinet

(front

A)

speaker

(3.6cm)

knob

spacer

bracket

(microphone)

.

MZ-425-14

button

(REC)

aN

MIC901

cushion

(microphone)

~

|

@

BTP1.7x3

@

screw

KNOB

torsion

spring

(toggle)

arm

(EJECT-B)

torsion

spring

(toggle)

Remove

claw

from

inside.

a

"Se

‘

T

Remove

claw

from

inside.

knob

(VOR)

Rs

ARM

(EJECT)

FITTING

Jif

|

torsion

spring

Hung

it

on

(toggle)

hait.

ah

Ne

Put

it

through

the

hole.

Move

the

spring

twice

or

three

times.

CASSETTE

LID

(B)

FITTING

cassette

lid

(B)

cassette

lid

(B)

Hold

shaft

up

by

pushing

stop

button.

Put

the

stopper

portion

in

the

hole.

SECTION

3

ADJUSTMENTS

2-1.

MECHANICAL

ADJUSTMENTS

AND

MEASUREMENT

PRECAUTION

1.

Clean

the

following

parts

with

a

denatured-alcohol-moistened

swab:

record/playback/erase

head

_

pinch

roller

rubber

belts

capstan

2,

Demagnetize

the

record/playback

head

with

a

head

demagentizer.

Do

not

use

a

magnetized

screwdriver

for

the

adjustments.

4.

The

adjustments

should

be

performed

with

the

rated

power

supply

voltage

unless

otherwise

noted.

Power

supply

voltage

:

3

Vdc

TAPE

SPEED

switch

:

2.4cm

Ww

Torque

Measurement

Tape

Tension

Measurement

Meter

Reading

Torqu

Meter

5~13g

*cm

(0.07

—

0.1800z

*

inch)

5~13g

*cm

(0.07

—

0.1800z

*

inch)

CQ-103M

CQ-201M

more

than

15

g*cm

(more

than

0.210z

*

inch)

Meter

Reading

more

than

30

g

CQ-403M

(more

than

0.42

02)

2-2.

ELECTRICAL

ADJUSTMENTS

Test

Tape

[om

[ee

[eee

3

kHz,

—

10

dB

4

Tape

Speed

Adjustment

WS-24

S-2-A030}

3

kHz,

—

20

dB

}

Head

Azimuth

Adjustment

Record/Playback

Head

Azimuth

Adjustment

setting:

VOLUME

control

>

mechanical

mid

TAPE

SPEED

switch

:

2.4

cm/s

VOR

switch

:

OFF

Procedure:

1.

Mode:

playback

test

tape

S-2-A030

(3

kHz,

~

20

dB)

earphone

jack

Z.

Tur

the

adjustment

screw

to

obtain

the

maximum

reading

on

VTVM.

Note:

Several

peaks

may

appear,

but

the

maximum.

Adjustment

Location:

First

remove

the

cover

(azimuth).

ae

head

azimuth

adjustment

screw

Tape

Speed

adjustment

Setting:

VOLUME

control

:

mechanical

mid

VOR

switch

:

OFF

Procedure:

©

Reform

2.4

cm

/s

speed

adjustment

before

1.2

cm/s

speed

adjustment

mode

:

playback

speed

checker

LFM-30

test

tape

or

WS-24:

tape

speed

2.4

cm

frequency

counter

WS-12:

tape

speed

1.2

cm

(3

kHz,

—

10dB)

earphone

jack

£3%

3,000

=

90

Hz

Frequency

difference

between

the

beginning

and

the

end

of

the

tape

should

be

within

0.5%.

2.4cm/s

(15

Hz)

1.2

cm/s

(15

Hz)

Adjustment

Location:

RV601

1.2c0m

speed

adjustable

resistors

M-527V

SECTION

4

DIAGRAMS

e

Semiconductor

Location

4-1.

PRINTED

WIRING

BOARD

Ref.

No.

[Location|

gemiconductor

Lead

Layouts

D

XN4312

GL-8PR42

:

Cc

10101

H-11

1C601

J-18

1¢701

H-13

Q101

D-10

0102

E-10

0103

F-10

0601

K-19

ANODE

CATHODE

0701

G-14

Q703

J-18

DA204U

0704

L-17

anode,

cathode

anode

cathode

anode

N.C.

18S335

ANODE

CATHODE

—p>{-_—

Note

on

Schematic

Diagram:

e

All

capacitors

are

in

uF

unless

otherwise

noted.

pF:

pyF

50

WV

or

less

are

not

indicated

except

for

electrolytics

and

tantalums.

e

All

resistors

are

in

Q

and

%

W

or

less

unless

otherwise

specified.

—Ew-+

:

printed

resistor.

:

B+

Line.

{__]

:

panel

designation.

Cc]

:

adjustment

for

repair.

Total

current

is

measured

with

no

cassette

installed.

Power

voltage

is

dc

3

V

and

fed

with

regulated

dc

power

supply

from

external

power

voltage

jack.

®

Voltages

are

dc

with

respect

to

ground

under

no-signal

conditions.

no

mark:

PLAY

(

):

REC

®

Voltages

are

taken

with

a

VOM

(10

MQ/V).

Voltage

variations

may

be

noted

due

to

normal

production

tolerances.

®

Signal

path.

>>

:

PB

x»

:

REC

Note

on

Printed

Wiring

Board:

e®

oO——

:

parts

extracted

from

the

component

side.

®

:

Through

hole.

:

Pattern

from

the

side

which

enables

seeing.

~

:

Pattern

of

the

rear

side.

[]

:

printed

resistor

of

the

rear

side.

e

@®

@

©

“um

[

2

|

®

|

46

[|

6

|

*

7

oe.

9

|

20

24

22

23

Jl02

OC

IN

3V

Oc}

S106

S104

REC

[MAIN

BOARD]

i

(24en}

+

[L2en]

J103

|

Ct

0)

DRY

BATTERY

—

SIZE

"AA"

YEL

™_

(IEC

DESIGNATION

R6)

[eal

2pcs

3V

E

EAKER

vet

oe

ye

G

RED

'

a

-

H

i

M901

MOTOR

RViOj

\

J

i

HEAD

FLEXIBLE

K

REC/PB

L

iy

ei

.

(i)

|

$103

M

S105

|

[vor]

i

:

[H]+[cl+

aN

ge

=e

paca!

e

IC

Block

Diagrams

LA5521M

NJM2072M

vue

®

INPUT)

Vee

i

GAIN

CONT)

OUTPUT

2

AMP

OUT

G)

OUTPUT

|

(I)}-—(2)

3)

(4)

RECOVERY

GNO

NC

Vee

OUT

@)

TIME

CAP

23>

4-2.

M-527V

SCHEMATIC

DIAGRAM

1

2

3

4

5

6

7

8

g

10

11

12

13

14

[

MA

[

N

BOARD

}

ae

‘

,

| :

12

POWER)

PE

|

PW

2.4V

2.7V

3.0V

R103

(2.

3V)

fito

R15

C194

gs

ay

tL

220

cud

+

J102

4V

cae

4

1.6V

1F

BC

IN

3V

MIC9O1

H-]

=

F

oe}

MIC

OL

oIPt!

[

C1

01

CI

Y

POWER

AMP

TP18

R104

R106

£108

Y

pyigy

DRY

BATTERY

15k

c103

a

0.038

|

fe)

oF

ee

>

Slee

MARE

rye

C107

voy

gre

NINZO7

5M

(IEC

BESIGNATION

R6)

>>

=>

6.01

2PCS

3V

HEAD

B

$102

B/4)

FLEXIBLE

|!

Te

a

|

.

TBI9

TP4

|

REC/PB

<>

y

|

(3

0

]}

2108

9

EAR

HCBS01

iM

uy

(CHASSIS)

1

sage

SP901

a

ao

SPEAKER

nal

erase

=X

|

5103

a704

oT

PSS

25818194

ro

LED

SWITCHING

Mao!

THP6O2

ea

.

re

210/72700PPM/*

C

na

C127

0,022

B

ce

TPS

(2.3¥)

F

ant

V>—H

R125

R124

R126

4.7k

1.5K

2.7K

AA

|

a

T

Vv

$104

4/2)

TAPE

SPEED

Q703

2581819A

SERVO

SWITCHING

1701

NJM2072M

VOR

[C701

VOR

1.5K/3900npa/"

C

7

NOTE:

@

-XX

and

-X

mean

standardized

parts,

so

they

may

have

some

difference

from

the

original

one,

Color

Indication

of

Appearance

Parts

Example:

KNOB,

BALANCE

(WHITE)...

(RED)

t

Parts

Color

Cabinet's

Color

SECTION

5

EXPLODED

VIEWS

@

Items

marked

“>”

are

not

stocked

since

they

are

seldom

required

for

routine

service.

Some

delay

should

be

anticipated

when

ordering

these

items.

@

The

mechanical

parts

with

no

reference

number

in

the

exploded

views

are

not

supplied.

Hardware

(#

mark)

list

and

accessories

and

packing

materials

are

given

in

the

last

of

the

electrical

parts

list.

(1)

GENERAL

SECTION

Ref.

No.

ak

ON

ke

weoOomn

mS

[—]

12

13

14

15

Part

No.

3-318-203-51

3-358-363-11

3-914-938-01

3-318-203-72

3-$14-339-01

3-914-3950-01

3-914-930-01

3-831-441-XX

3-914-948-21

3-914-947-01

3~914-946-01

3-914-934-01

3-914-933-01

3-914-932-01

3-914-879-O1

MZ-425-14

Description

Remark

Ref.

No

Part

No.

SCREW

(B1.

7X12),

TAPPING

16

X-3368-573-1

PLATE,

BLIND

17

3-914-931-01

KNOB

(PAUSE-A)

18

3-914-936-01

SCREW

(B1.

7X5),

TAPPING

19

X~3368-570-1

KNOB

(FR)

20

3-914-878-01

LID,

BATTERY

CASE

21

3-914-952-01

CUSHION

(BATTERY

CASE

LID)

*

22

3-914-949-01

SPACER,

KNOB

*

23

3-914-937-01

BUTTON

(REC)

24

3-318-382-31

BUTTON

(PLAY)

*

25

A-3016-591-A

BUTTON

(STOP)

26

3-342-156-51

SPRING

(B),

BATTERY

COIL

27

3-914-929-01

TERMINAL

(A),

BATTERY

28

3-914-958-11

SPRING

(C),

BATTERY

COIL

MICS01

1-542-136-11

KNOB

(VOR)

ae

eee

SP901

1-544-657-12

Description

Remark

CABINET

(FRONT)

(A3)

ASSY

SPRING

(TOGGLE),

TORSION

ARM

(EJECT-B)

LID

(BQ)

ASSY,

CASSETTE

KNOB

(F-PB)

COVER

(AZIMUTH)

BRACKET

(MICROPHONE)

CUSHION

(MICROPHONE)

SCREW

(1.

7X3),

TAPPING

MAIN

BOARD,

COMPLETE

SCREW

PAPER,

SHIELD

CABINET

(REAR)

MICROPHONE,

ELECTRET

CONDENSER

SPEAKER

(3.

6CM)

(2)

MECHANISM

SECTION

(MZ-425-14)

65

Mgo1

—

x

HCB901

Se

Oy

68

Ref.

No.

Part

No.

Description

Remark

Ref.

No.

Part

No.

Description

Remark

51

3-704-243-1141

SCREW

(Pi.

7X2.

0)

67

_3-378-792-01

SPRING,

COMPRESSION

*

52

3-914-920-01

PLATE

(FR),

LOCK

68

3-914-914-01

GUIDE,

TAPE

*

53

3-914-919-01

SLIDER

(FR)

*

69

3-914-913-01

LEVER

(PLAY)

54

3-377-420-11

BELT

70

3-350-945-11

WASHER

55

X-3368-702-1

FLYWHEEL

(1.3)

ASSY

71

X-3368-585-1

PINCH

LEVER

ASSY

56

3-914-903-01

SPRING

(FR),

TORSION

72

3-914-902-01

SPRING

(P),

TORSION

*

57

X-3368-486-1

LEVER

(STOP)

ASSY

73

3-914-904-01

SPRING

(PFR),

TORSION

58

3-914-906-01

SPRING

(S.

OFF),

TORSION

74

3-914-907-01

SPRING

(MIDWAY

GEAR),

TORSION

59

3-914-915-01

ARM

(S.

OFF)

75

X-3368-587-1

REEL

ASSY,

§

60

X-3368-582-1

REEL

ASSY,

T

76

3-914-916-01

ARM

(CKAW

DETECTION)

*

61

3-914-923-01

COVER,

MD

77

3-331-007-21

WASHER

62

3-366-892-11

SCREW

(M1.

4X1.

4)

78

X-3368-584-1

ARM

(MIDWAY

GEAR)

ASSY

63

3-914-908-01

SPRING

(REC

LOCK),

TENSION

*

79

X-3368-701-1

CHASSIS

(COMP.)

ASSY

(C),

MECH

*

64

X-3368-583-1

LEVER

(REC)

ASSY

HCB901

1-500-135-11

HEAD,

MAGNETIC

(REC/PB/ERASE)

65

3-703-816-82

SCREW

(M1.

4X6.0),

SPECIAL

HEAD

MSO1

1-698-384-11

MOTOR,

DC

66

3-704-245-42

SCREW

(P1.

4X3.

0)

Sony M-527V User manual

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