Sony M-727V Manuale utente

SERVICE

MANUAL

were

COUNTER

TAPE

Model

Name

Using

Similar

Mechanism

Tape

Transport

Mechanism

Type

M-I21V

Model

Canadian

Model

AEP

Model

Tourist

Model

NEW

MZ-627V-14

SPECIFICATIONS

Tape

CMIEROCASSETTE)™

(normal

position

type)

Recording

system

2-track

1-channel

monaural

Speaker

Approx.

3.6

(1s

in.)

dia.

Tape

speed

2.4

cm/s

(‘%o

ips),

1.2

cm/s

(‘2

ips)

Frequency

range

250

—

4,000

Input

Microphone

input

jack

(minijack/PLUG

POWER)

sensitivity

0.24

for

kilohms

lower

impedance

microphone

Output

Earphone

jack

(minijack)

for

300

ohms

earphone

Power

output

160

(at

10%

harmonic

distortion)

Battery

life

(recording)

SONY

SUM-3

(NS)

5.5H

SONY

ALKALINE

AM3

(N)

14H

Power

requirements

Two

(size

AA)

batteries:

Sony

AC-E30M

power

adaptor

(not

supplied):

220

AC,

(European

model)

120/220

AC,

50/60

(model

for

other

countries)

Sony

DCC-E130L

car

battery

cord

(not

supplied):

car

battery

Dimensions

(w/h/d)

Approx.

66.7

120.8

incl.

projecting

parts

and

controls

Mass

Approx.

180

incl.

batteries

Supplied

accessories

Microcassette

tape

MC-30

(1)

(AEP,

Tourist)

Carrying

case

(1)

(AEP,

Tourist)

(size

AA)

batteries

(2)

(AEP

Tourist)

ERPHONE

(1)

(Tourist)

Design

and

specifications

are

subject

change

without

notice.

MICROCASSETTE®CORDER

SONY.

SERVICING

NOTE

Flexible

Circuit

Board

Repatring

Keep

the

temperature

the

soldering

iron

around

270

°C

during

repairing.

not

touch

the

soldering

iron

the

same

conductor

the

circuit

board

(within

times).

careful

not

apply

force

the

conductor

when

soldering

unsoldering.

Notes

chip

component

replacement

Never

reuse

disconnected

chip

component.

Notice

that

the

minus

side

tantalum

capacitor

may

damaged

heat.

SECTION

This

section

extracted

from

Parts

Identification

EAR

FAST

TAPE

SPEED»

TAPE

COUNTER

instruction

manual.

GENERAL

MIC

(PLUG

POWER)

MICROPHONE

REC/BATT

CUE

MARKER

tte

PAUSE

CUE/REVIEW

VOR

SECTION

DISASSEMBLY

Note:

the

disassembly

procedure

the

numerical

order

given.

CASSETTE

AND

BATTERY

LIDS

Stop

the

cassette

lid

(C)

halfway.

lid

(C)

precision

Screwdriver

cassette

equivalent

lid

(C)

precision

screwdriver

equivalent

CABINET

two

claws

battery

terminal

(a)

Ohl)

battery

coil

spring

(c)

battery

coil

spring

(b)

BTP1.7

oral

knob

Pree

abies

inside

side.

cabine

Be.

rom

inside

out

side

fee

exe

LYS”

—_—

mete

SAXQ

Sec

b&b

eee

SST

knob

(FR)

MECHANISM

DECK

cabinet

(front

speaker

(3.6cm)

knob

spacer

bracket

(microphone)

M2Z-627V-14

button

(REC)

oN.

MIC901

cushion

(microphone)

@ @

BTP1.7x3

main

board

screw

KNOB

torsion

spring

(toggle)

arm

(EJECT-B)

torsion

spring

(toggle)

Remove

claw

from

inside.

knob

OR)

ARM

(EJECT)

FITTING

torsion

spring

Hung

(toggle)

shaft

Put

through

the

hole.

Move

the

spring

twice

three

times.

CASSETTE

LID

(C)

FITTING

cassette

lid

(c)

cassette

lid

(c)

Hold

shaft

pushing

stop

button.

Put

the

stopper

portion

the

hole.

SECTION

ADJUSTMENTS

2-1.

MECHANICAL

ADJUSTMENTS

AND

MEASUREMENT

PRECAUTION

Clean

the

following

parts

with

denatured-alcohol-moistened

swab:

record/playback/erase

head

pinch

roller

rubber

belts

capstan

Demagnetize

the

record/playback

head

with

head

demagentizer.

not

use

magnetized

screwdriver

for

the

adjustments.

The

adjustments

should

performed

with

the

rated

power

supply

voltage

unless

otherwise

noted.

Power

supply

voltage

Vdc

TAPE

SPEED

switch

2.4cm

Torque

Measurement

wr on

Tape

Tension

Measurement

Meter

Reading

than

CQ-403M

(more

than

0.42

02)

2-2.

ELECTRICAL

ADJUSTMENTS

5~13g

*cm

(0.07

—

0.1800z

inch)

than

(more

than

0.210z

inch)

Test

Tape

[om

[eee

[ee

kHz,

—

WS-24

2.4

$-2-A030

kHz,

—

Head

Azimuth

Adjustment

Record/Playback

Head

Azimuth

Adjustment

Tape

Speed

Adjustment

setting:

VOLUME

control

mechanical

mid

TAPE

SPEED

switch

2.4cm/s

VOR

switch

OFF

Procedure:

Mode:

playback

test

tape

S-2-A030

kHz,

—

dB)

—

set

earphone

jack

Turn

the

adjustment

screw

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

speed

adjustment

before

1.2

cm/s

speed

adjustment

mode

playback

speed

checker

LFM-30

test

tape

WS-24:

tape

speed

2.4

frequency

counter

WS-12:

tape

speed

1.2

kHz,

—

10dB)

earphone

jack

Tape

Speed

checker

requency

counter

3,000

Frequency

difference

between

the

beginning

and

the

end

the

tape

should

within

0.5%.

2.4cm/s

(15

Hz)

1.2

cm/s

(15

Hz)

Adjustment

Location:

RV601

1.20m

speed

adjustable

resistors

M-727V

SECTION

DIAGRAMS

Semiconductor

Lead

Layouts

Location

4-1.

PRINTED

WIRING

BOARD

red

14 45

D101

D-12

XN4601

188335

—

__|

—

D-13

J102

D-11

J-5

5102

aide

$104

[44__

FAST

PB]

[TAPE

SPEED]

CATHODE

[2.4cm|—>[1.2cm]

6-13

(MAIN

BOARD]

—

D-10

J103

E-10

F-10

J-9

DRY

BATTERY

K-10

XN4501

GL-8PR42

—

SIZE

"AA"

K-9

IEC

DES

GNATION

R6)

K-20

K-17

SPEAKER

K-19

G-14

L-18

J101

“

;

(PLUG

POWER)

6 F

ANODE

CATHODE

RED

wico0i

DA204U

|_|

anode,

cathode

anode

MOTOR

RVIOL

cathode

anode

;

N.C.

HEAD

Note

Schematic

Diagram:

FLEXIBLE

All

capacitors

are

unless

otherwise

noted.

pF:

ppyF

BOARD

less

are

not

indicated

except

for

electrolytics

and

tantalums.

All

resistors

are

and

less

unless

otherwise

specified.

—e+

printed

resistor.

{0}

B+

Line.

S103

({___]:

panel

designation.

vor]

[~~]

adjustment

for

repair.

Total

current

measured

with

cassette

installed.

lad

Power

voltage

and

fed

with

regulated

power

supply

from

external

power

voltage

jack.

Voltages

are

with

respect

ground

under

no-signal

conditions.

|_|

mark:

PLAY

Block

Diagrams

REC

Voltages

are

taken

with

VOM

(10

MQ/V).

;

LAS521M

NJM2072M

Voltage

variations

may

noted

due

normal

production

eines

CONT

GND

INPUT

CG)

Vcc

Signal

path.

(8)

)

x»

REC

GAIN

CONT)

(7)

OUTPUT

Note

Printed

Wiring

Board:

AMP

OUT

OUTPUT

o——:;

parts

extracted

from

the

component

side.

Through

hole.

Gye

Pattern

from

the

side

which

enables

seeing.

GNO@)

©)

TIME

CAP

©€----

;

Pattern

the

rear

side.

{._]

printed

resistor

the

rear

side.

M-727V

4-2.

SCHEMATIC

DIAGRAM

12 13

[B+]

5101

TP2

(POWER)

3.0V

R102

R103

RI29

RON

sis

820

100

£102

mdb

102

0.047

PRE

AMP

J102

MIC9O1

rear

{ac

MIC

cit

0.901

1P18

R104 R106

Fo]

gay

aneneay

Jt!

Ioe

1C1

“Ls

SIZE"AA"

wie

POWER

AMP

(IEC

DESIGNATION)

(PLUG

POWER)

2PCS

C10}

0.0047

121

Fae

etl

ose

‘

recrra

OTT

favy

ais

Lo]

het

[EAR]

HCB901

MEME

R119

0.001

wae

Ree

TPS

ERASE

Ho}

1-0

Bay

S102

4/4

2st2412K

oly

Y)reg

(CHASSIS)

nal

1P22

AGC

v_y¥

+—[o4

SP901

a701

PB—>

REC

1P7

“ee

HEAD

VOR/CUE

MARKER

Fo]

SPEAKE

FLEX

BLE

SWITCHING

Q401,

702

LEO

DRIVE

BOARD

M01

D401

MOTOR

GL8PR42

REC/BATT]

°:3¥

THP602

210/2700ppm/C

TPS

[2.4cn}—~[1.

Zen]

Q703

2501819A

SERVO

SWITCHING

2.3

a401

(272)

XN4312

Q302,

303

CUE

MARKER

SWITCHING

aso2

7a}

TP30

XN4S14

$104

1/2)

TAPE

SPEED

$301

CUE]

13!

2.9

(0)

1C601

R306

FS)

0303

LAS521M

roo

2saiaiaa

cats

R305

R307

0.1

47k

IC601|

MOTOR SERVO

aait

Q301

(2/2)

x01

TAPE

SPEED

cz04

2.6

(0)

4.7

Q301

MULTI

VIBRATOR

Q302

(2/2)

XN4514

Q304

VOR

SWITCHING

RV601,

602

[SPEED

ABJ.]

—10—

NOTE:

-XX

and

-X

mean

standardized

parts,

they

may

have

some

difference

from

the

original

one.

Color

Indication

Appearance

Example:

KNOB,

BALANCE

(WHITE)...

(RED)

* t

Parts

Color

(1)

GENERAL

SECTION

Parts

Cabinet’s

Color

SECTION

EXPLODED

VIEWS

Items

marked

“+”

are

not

stocked

since

they

are

seldom

required

for

routine

service.

Some

delay

should

anticipated

when

ordering

these

items.

The

mechanical

parts

with

reference

number

the

exploded

views

are

not

supplied.

Hardware

mark)

list

and

accessories

and

packing

materials

are

given

the

last

the

electrical

parts

list.

Ref.

No.

Part

No.

3-318-203-51

3-914-944-01

3-914-945-01

3-318-203-72

3~914-938-01

3~914-950-01

3-914-930-01

3-831-441-XX

3-914-948-11

3-914-947-11

3-914-946~11

3-328-319-11

3-669-481-07

3-914-934-01

3-914~933-01

3~914-932-01

3-914-879-01

SP901

MIC901

Description

Remark

CABINET

(FRONT)

(C1)

ASSY

SPRING

(TOGGLE),

TORSION

ARM

(EJECT-B)

LID

(CO)

ASSY,

CASSETTE

KNOB

(F~PB)

(FAST

PB)

COVER

(AZIMUTH)

BRACKET

(MICROPHONE)

CUSHION

(MICROPHONE)

SCREW

(1.

7X3),

TAPPING

A-3016-595~-A

MAIN

BOARD,

COMPLETE

Description

Remark

Ref.

No.

Part

No.

SCREW

(B1.

7X12),

TAPPING

X-3368-595-1

BUTTON

(CUE)

3-914~-931-01

KNOB

(PAUSE~-B)

(PAUSE)

3-914-936-01

SCREW

(B1.

7X5),

TAPPING

X-3368-592-1

KNOB

(FR)

3-914-878-01

LID,

BATTERY

CASE

3-914-952-01

CUSHION

(BATTERY

CASE

LID)

3-914-949-0601

SPACER,

KNOB

3-914-937-01

BUTTON

(REC)

3~318-382-31

BUTTON

(PLAY)

BUTTON

(STOP)

3-342-156-51

STRAP,

HAND

3-914-929-01

(DIA.

1X10),

PARALLEL

3-914-958-31

SPRING

(B),

BATTERY

COIL

3-358-363-11

TERMINAL

(A),

BATTERY

MICSQ1

1-542-136-11

SPRING

(C),

KNOB

(VOR)

BATTERY

COIL

SPS01

1-344-657~12

SCREW

PAPER,

SHIELD

CABINET

(REAR)

PLATE,

BLIND

MICROPHONE,

ELECTRET

CONDENSER

SPEAKER

(3.

6CM)

(2)

MECHANISM

SECTION

(MZ-627V-14)

SESS

RZ.

eee

M901

Ref.

No.

Part

No.

Description

Remark

Ref.

No.

Part

No.

Description

Remark

3-704-243-11

SCREW

(P1.

7X2.

3-704-245-42

SCREW

(P1.

4X3.

3-914-920-01

PLATE

(FR),

LOCK

3-378-792-01

SPRING,

COMPRESSION

3-914-919-01

SLIDER

(FR)

3-914-914-01

GUIDE,

TAPE

3-377-420-11

BELT

3-914-913-01

LEVER

(PLAY)

X-3368-702-1

FLYWHEEL

(1.3)

ASSY

X-3368-585-1

PINCH

LEVER

ASSY

3-914-903-01

SPRING

(FR),

TORSION

3-350-945-11

WASHER

X-3368-486-1

LEVER

(STOP)

ASSY

3-914-902-01

SPRING

(P),

TORSION

3-914-906-01

SPRING

(S.

OFF),

TORSION

3-914-904-01

SPRING

(PFR),

TORSION

3-914-915-01

ARM

(S.

OFF)

X-3368-584-1

ARM

(MIDWAY

GEAR)

ASSY

X-3368-582-1

REEL

ASSY,

3-331-007-21

WASHER

3-343-948-01

BELT

3-914-916-01

ARM

(CKAW

DETECTION)

1-548-579-21

COUNTER,

TAPE

(SMALL

TYPE)

X-3368-587-1

REEL

ASSY,

6§3

3-914-923-01

COVER,

3-914-907-01

SPRING

(MIDWAY

GEAR),

TORSION

3-366-892-11

SCREW

(M1.

4X1.

X-3368-701-1

CHASSIS

(COMP.)

ASSY

(C),

MECH

3-914-908-01

SPRING

(REC

LOCK),

TENSION

HCB901

1-500-135-11

HEAD,

MAGNETIC

(REC/PB/ERASE)

X-3368-583-1

LEVER

(REC)

ASSY

M901

1-698-384-11

MOTOR,

3-703-816-82

SCREW

(M1.

4X6.0),

SPECIAL

HEAD

—12—

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