Sony M-627V - Microcassette Recorder User manual

SERVICE

MANUAL

Tape

GIEROCASSETTE™

(normal

position

type)

Recording

system

2-track

1-channel

monaural

Speaker

Approx.

3.6

cm

(176

in.)

dia.

Tape

speed

2.4

cm/s

('%6

ips),

1.2

cm/s

('%z2

ips)

Frequency

range

250

—

4,000

Hz

Input

Microphone

input

jack

(minijack/PLUG

IN

POWER)

sensitivity

0.24

mV

for

3

kilohms

or

lower

impedance

microphone

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-E30L

AC

power

adaptor

(not

supplied):

120

V

AC,

60

Hz

*Sony

DCC-E130L

car

battery

cord

(not

supplied):

12

V

car

battery

M-

MIGROCABSETTE

thd

SPECIFICATIONS

Model

Name

Using

Similar

Mechanism

Tape

Transport

Mechanism

Type

M-627V/671V

US

Model

Canadian

Mode!

M-627V/677V

AEP

Model

M-627V

Photo:

M-627V

MZ-627V-14

Dimensions

(w/h/d)

Approx,

66.7

x

120.8

x

25

mm

(2%

x

4’

x

1

in.)

incl.

projecting

parts

and

controls

Mass

Approx.

180

g

(6.4

0z)

incl.

batteries

Supplied

accessories

AC

power

adaptor

(1,

M-677V

only)

.

Battery

charge

adaptor

(1,

M-677V

only)

Rechargeable

batteries

(2,

M-677V

only)

Microcassette

tape

MC-30

(1,

M-627V

AEP

only)

Carrying

case

(1,

M-627V

AEP

only)

R6

(size

AA)

batteries

(2,

M-627V

AEP

only)

Design

and

specifications

are

subject

to

change

without

notice.

MICROCASSETTE*CORDER

SONY.

SERVICING

NOTE

Flexible

Circuit

Board

Repairing

@

Keep

the

temperature

of

the

soldering

iron

around

270°C

during

repairing.

Do

not

touch

the

soldering

iron

on

the

same

conductor

of

the

circuit

board

(within

3

times).

Be

careful

not

to

apply

force

on

the

conductor

when

soldering

or

unsoldering.

Notes

on

chip

component

replacement

@

Never

reuse

a

disconnected

chip

component.

Notice

that

the

minus

side

of

a

tantalum

capacitor

may

be

damaged

by

heat.

SECTION

1

GENERAL

e

Parts

Identification

COUNTER

SAFETY-RELATED

COMPONENT

WARNING!!

COMPONENTS

IDENTIFIED

BY

MARK

A

OR

DOTTED

LINE

WITH

MARK

A

ON

THE

SCHEMATIC

DIAGRAMS

AND

IN

THE

PARTS

LIST

ARE

CRITICAL

TO

SAFE

OPERATION.

REPLACE

THESE

COMPONENTS

WITH

SONY

PARTS

WHOSE

PART

NUMBERS

APPEAR

AS

SHOWN

IN

THIS

MANUAL

OR

IN

SUPPLEMENTS

PUB-

LISHED

BY

SONY.

ATTENTION

AU

COMPOSANT

AYANT

RAPPORT

A

LA

SECURITE!

LES

COMPOSANTS

IDENTIFIES

PAR

UNE

MARQUE

/\

SUR

LES

DIAGRAMMES

SCHEMATIQUES

ET

LA

LISTE

DES

PIECES

SONT

CRITIQUES

POUR

LA

SECURITE

DE

FONCTIONNEMENT.

NE

REMPLACER

CES

COM-

POSANTS

QUE

PAR

DES

PIECES

SONY

DONT

LES

NUMEROS

SONT

DONNES

DANS

CE

MANUEL

OU

DANS

LES

SUPPLEMENTS

PUBLIES

PAR

SONY.

—

This

section

is

extracted

from

instruction

manual.

MIC

(PLUG

IN

POWER)

Microphone

REC/BATT

e

atte

PAUSE

<4

CUE/REVIEW

>>

|

VOR

SECTION

2

DISASSEMBLY

Note:

Follow

the

disassembly

procedure

in

the

numerical

order

given.

CASSETTE

AND

BATTERY

LIDS

front

cabinet

(B)

©

Stop

the

cassette

lid

(B)

halfway.

lid

(B)

precision

screwdriver

cassette

lid

(B)

or

equivalent

precision

screwdriver

or

equivalent

battery

case

lid

battery

case

lid

CABINET

battery

terminal

(a)

battery

coil

spring

(c)

battery

coil

@

spring

(b)

@

BTP1.7x

12

|

SS

©

Push

knob

(PAUSE-A)

from

inside

to

out

side.

@

cabinet

(rear)

MECHANISM

DECK

cabinet

(front

B)

speaker

(3.6cm)

bracket

(microphone)

MZ-627V-14

button

(REC)

button

(PLAY)

SAP

4)

“ew

oN

a

MIC301

cushion

(microphone)

@

BTP1.7

X

3

NAC

@

screw

KNOB

torsion

spring

(toggle)

arm

(EJECT-B)

torsion

spring

(toggle)

Remove

claw

from

inside.

A

<3

ARM

(EJECT-B)

FITTING

arm

(EJECT-B)

torsion

spring

Hung

it

on

(toggle)

shaft,

the

hole.

Move

the

spring

twice

or

three

times.

CASSETTE

LID

(B)

FITTING

uw

cassette

lid

(B)

|

\

Hold

shaft

up

by

pushing

stop

button.

cassette

lid

(B)

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

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

wr

Torque

Measurement

5~13g

*

cm

(0.07

—

0.18002

«

inch)

COM

Tape

Tension

Measurement

COQ-403M

more

than

30

g

(more

than

0.42

0z)

2-2.

ELECTRICAL

ADJUSTMENTS

Test

Tape

Ce

ee

3kHz,

-

10dB|

Tape

Speed

Adjustment

S-2-A030!

3

kHz,

—

20

dB

|

Head

Azimuth

Adjustment

Record/Playback

Head

Azimuth

Adjustment

5~13g

°cm

(0.07

—

0.1800z

*

inch)

more

than

15

g*

cm

(more

than

0.210z

*

inch)

setting:

VOLUME

control

:

mechanical

mid

TAPE

SPEED

switch

:

2.4cm/s

VOR

switch

:

OFF

Procedure:

1.

Mode:

playback

test

tape

$-2-A030

(3

kHz,

—

20

dB)

earphone

jack

2.

Turn

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).

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

oF

WS-24:

tape

speed

2.4

cm

frequency

counter

WS-12:

tape

speed

1.2

cm

(3

kHz,

—

10dB)

earphone

jack

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

1.2cm

speed

adjustable

resistors

M-627V/677V

SECTION

4

DIAGRAMS

@

Semiconductor

e

Semiconductor

Lead

Layouts

4-1.

PRINTED

WIRING

BOARD

Location

ale

eS

cee

he

eo

Pe

I

ae

13

“4

|

6

|

€@

|

@7

|

19

20

|

2

[|

2

|

2

:

XN4312

GL-8PR42

Ji02

Location

XN4601

Fi

SBN

ai

E-12

—_

OC

E-13

:

|

0-17

Bigs

ae

$104

K-5

B

me

TAPE

SPEED

[2.4em]

—>[i.2cm]

H-11

{MAIN

BOARD]

PB

1-18

weer

G-13

6

K

C

J103

3 F

[EAR]

|

=a

D-1

0

1

ANODE

CATHODE

E-10

DRY

BATTERY

F~11

D

“=

tige

DESIGNATION

R6)

K-17

DA204U

YEL

2pcs

3V

K-19

|_|

SP90I

De

G-14

SPEAKER

aoe

L-18

anode,

cathode

anode

E

J-19

=

JO!

cathode

Mic

|

ha:

anode

N.C.

:

(PLUG

IN

POWER)

188335

fl

RED

Ii

G

MIC9Ol

@

MIC

ANODE

;

CATHODE

H

;

RVLOL

|

:

HEAD

Note

on

Schematic

Diagram:

=

FLEXIBLE

e

All

capacitors

are

in

wF

unless

otherwise

noted.

pF:

ppF

50

WV

or

less

are

not

indicated

except

for

electrolytics

K

and

tantalums.

|

REC/PB

®

All

resistors

are

in

Q

and

%

W

or

less

unless

otherwise

fe

Se

specified.

i

|

e

ewe

:

printed

resistor.

ERASE

°

:

B+

Line.

e

[{]:

panel

designation.

©

[(——]

:

adjustment

for

repair.

M

®

Total

current

is

measured

with

no

cassette

installed.

e

Power

voltage

is

dc

3

V

and

fed

with

regulated

de

power

supply

from

external

power

voltage

jack.

®

Voltages

are

de

with

respect

to

ground

under

no-signal

N

conditions.

no

mark:

PLAY

Ci

REC

e

IC

Block

Diagrams

®

Voltages

are

taken

with

a

VOM

(10

MQ/V).

Voltage

variations

may

be

noted

due

to

normal

production

LA5521M

NJM2072M

tolerances,

ce

VS

GND

®

Signal

path.

CONT

INPUT

(1)

(8)

Vee

>

:

PB

(8)—{7)—6)—)

oe

ee

>>):

REC

Note

on

Printed

Wiring

Board:

o————

:

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.

C2)

3)

4)

NC

Veco

OUT

GAIN

CONT)

()

©

(7)

OUTPUT

2

AMP

OUT

G)

(6)

OUTPUT

|

RECOVERY

GNO@)

SO)

TIME

CAP

e.

SCHEMATIC

DIAGRAM

1

2

MICSO}t

MIC

Ji0t

lesa

once

Ic

lesa

once

IN

POWER)

em

eee

QI01,

102

PRE

AMP

$101

TP2

(POWER)

.

I

3.0V

Oo

POWER

AMP

IC101

NJM2073M

=

POWER

A

5102

G/4)

PB—REC

7

TP1O

1C101

ear}

PB=<—

SWITCHING

TPS

$106

$104

1/2)

TAPE

SPEED

-4cm|-—[1.2cn]

25818194

C701

1€701

vet

0.047

NJM2072¢

SERVO

4.7k

B®)

F

VOR

SWITCHING

e

>

R701

S

10k

1C701

RV&01,

602

&

TP36,

SPEED

ADJ

2

meee

R703

k

fe]

5.

9x

=

$104

(2/2)

—

MOTOR

SERVO

TAPE

SPEED

[1.

2cn]+——>[2.

4cn|

a

i

a

i

ee

To

es,

Le

M-627V/677V

13

14

BRY

BATTERY

SIZE

"AA"

{IEC

BESEGNATION

R&}

(2PCS

3V)

roy

(CHASSIS)

ae

5P901

™

SPEAKER

i

TP7

,,

SaEN

Z/

g

I

ro

MSOI

MOTOR

NOTE:

@

-XX

and

-X

mean

standardized

parts,

so

they

may

have

some

difference

from

the

original

one.

®

Color

Indication

Example:

KNOB,

BALANCE

(WHITE)...

(RED)

t

Cabinet’s

Color

of

Appearance

Parts

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

Part

No.

3-318-203-51

3-358-363-11

3~914-938-01

3-318-203-72

3-914-939-01

3-$814-950-01

3-914-930-01

3-831-441-XX

3-914-948-11

3-914-947-11

3-914~-946-11

3-328-318-11

3-669-481-07

3-914-934-01

3-914-933-01

3-914-932-01

3-$14-879-01

SP901

6

Description

Remark

Ref.

No.

Part

No.

SCREW

(B1.

7X12),

TAPPING

18

X-3368-579-1

PLATE,

BLIND

19

3-914-931-01

KNOB

(PAUSE-~A)

(PAUSE)

20

3-914-936-01

SCREW

(B1.

7X5),

TAPPING

21

X-3368-568-1

KNOB

(FR)

21

X-3368-576-1

LID,

BATTERY

CASE

22

3-914-878-01

CUSHION

(BATTERY

CASE

LID)

23

3-914-952-01

SPACER,

KNOB

«

24

3-$14-949-01

BUTTON

(REC)

*

25

3-914-937-01

BUTTON

(PLAY)

26

3-318-382-31

BUTTON

(STOP)

*

27

A-3016-592-A

STRAP,

HAND

28

3-342-156-51

(DIA.

1X10),

PARALLEL

29

3-914-929-01

SPRING

(B),

BATTERY

COIL

*

30

3-914-S$58-21

TERMINAL

(A),

BATTERY

SPRING

(C),

KNOB

(VOR)

BATTERY

COIL

—11—-—

MICS01

1-542-136-11

SP901

1-544-657-12

Remark

Description

CABINET

(FRONT)

(B3)

ASSY

SPRING

(TOGGLE),

TORSION

ARM

(EJECT-B)

LID

(B2)

ASSY,

CASSETTE

(M-677V)

LID

(B1)

ASSY,

CASSETTE

(M-627V)

KNOB

(F-PB)

(FAST

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-627V-14)

Ref.

No.

*

ol

02

33

04

59

36

37

58

09

60

61

62

63

64

65

66

67

M901

Part

No.

Description

Remark

3-704-243-11

SCREW

(P1.

7X2.

0)

3-914-920-01

PLATE

(FR),

LOCK

3-914-919-01

SLIDER

(FR)

3-377-420-11

BELT

X-3368-702-1

FLYWHEEL

(1.3)

ASSY

3-914-903-01

SPRING

(FR),

TORSION

X-3368-486-1

LEVER

(STOP)

ASSY

3-914-906-01

SPRING

(S.

OFF),

TORSION

3-914-915-01

ARM

(S.

OFF)

X-3368-582-1

REEL

ASSY,

T

3-343-948-01

BELT

1-548-579-21

COUNTER,

TAPE

(SMALL

TYPE)

3-914-923-01

COVER,

MD

3-366-892-11

SCREW

(M1.

4X1.

4)

3-914-908-01

SPRING

(REC

LOCK),

TENSION

X-3368-583-1

LEVER

(REC)

ASSY

3-703-816-82

SCREW

(M1.

4X6.0),

SPECIAL

HEAD

Ref.

No.

HCBS01

ad.

Part

No.

Description

Remark

68

69

70

71

72

73

74

75

76

77

78

79

80

81

HCB901

M901

3-704-245-42

SCREW

(P1.

4X3.

0)

3-378-792-01

SPRING,

COMPRESSION

3-914-914-01

GUIDE,

TAPE

3-914-913-01

LEVER

(PLAY)

X-3368-585-1

PINCH

LEVER

ASSY

3-350-945-11

WASHER

3-914-902-01

SPRING

(P),

TORSION

3-914-904-01

SPRING

(PFR),

TORSION

X-3368-584-1

ARM

(MIDWAY

GEAR)

ASSY

3-331-007-21

WASHER

3-914-916-01

ARM

(CKAW

DETECTION)

X~3368-587-1

REEL

ASSY,

S

3-914-907-01

SPRING

(MIDWAY

GEAR),

TORSION

X-3368-701-1

CHASSIS

(COMP.)

ASSY

(C),

MECH

1-500-135-11

HEAD,

MAGNETIC

(REC/PB/ERASE)

1-698-384-11

MOTOR,

DC

Sony M-627V - Microcassette Recorder User manual

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