Sony WM-150 User manual

AEP

Model

UK

Model

E

Mode!

Dolby

noise

reduction

manufactured

under

license

from

Dolby

Laboratories

Licensing

Corporation.

“DOLBY”

and

the

double-D

symbo!

DJ

are

trademarks

of

Dolby

Laboratories

Licensing

Corporation.

SPECIFICATIONS

Frequency

response

(DOLBY

NR

OFF)

20-18,000

Hz

(with

the

TAPE

selector

set

to

NORM

or

CrO,/METAL)

Model

Name

Using

Similar

Mechanism

New

Mechanism

Tape

Transport

Mechanism

Type

Output

Earphones

(stereo

minijack)

load

impedance

8-300

Power

output

SmW+5mW

at

DC

operation

|

TABLE

OF

CONTE

NTS

(at

10%

harmonic

distortion)

loard

impedance

16

Q

;

Power

requirements

1.5V

OC

Section

.

Title

Page

Rechargeabie

battery

.

One

R6

(size

AA)

battery

DC

IN

1.5V

jack

accepts

(Using

battery

case):

Specifications

.

Sony

AC-D1M

power

adaptor

(optional)

Sony

EBP-10

battery

case

(Optional)

for

use

with

two

R6

(size

AA)

batteries

Sony

DCC-70

car

battery

cord

(optional)

for

use

SECTION

1.

SERVICING

NOTE

PROBA

aS

Be

with

12V

car

battéry

.

Battery

life

(DOLBY

NR

OFF)

SECTION

2.

GENERAL

Tape

playback

; :

Location

and

Function

of

Controls

........

3

Approx.

4

hours

Approx.

7.5

hours

Rechargeable

NC-6WM

(fully

charged)

Sony

alkaline

battery

AM3

(N)

Sony

battery

SUM-3

(NS)

Approx.

3

hours

Rechargeable

NC-6WM

+

Sony

AM3

(N)

Approx.

11

hours

For

maximum

performance

we

recommend

the

use

of

alkaline

batteries.

SECTION

3.

ADJUSTMENTS

3-1.

Mechanical

Adjustments.

.

Ooi

Bt He Se

eae.

os

i

Se

3-2.

Electrical

Adjustments.

.

BPs

oa),

tach

Scag.

ee,

1

Dimensions

Approx.

106.4

70.1xx22.1mm

(w/hid)

not

incl.

projecting

parts

and

controls

Approx.

108*74.4x226mm

(w/h/d)

SECTION

4.

DIAGRAMS

incl.

projecting

parts

and

controls

:

Weight

Approx.

185g

incl.

rechargeable

battery,

not

incl.

4-1,

Semiconductor

Lead

Layouts

see

ee

ew

.

6

other

accessories

-2.

Printed

Wiring

Boards.......

7

Accessories

supplied

Battery

case

(1)

Carrying

case

(1)

4-2.

he

6

Bye

ee

Battery

charger

(1)

Rechargeable

battery

(1)

4-3.

Schematic

Diagram

......,.,,...

..

29

Stereo

earphones

(1)

.

AC

plug

adaptor

(1)

(E_

model)

4-4.

IC

Block

Diagram

....

.

oe

ae

See

oS,

SECTION

5.

EXPLODED

VIEWS.

.

i

3

SECTION

6.

ELECTRICAL

PARTS

LIST.

.

..

16

Note:

Use

only

the

recommended

AC

power

adaptor

or

car

battery

cord

manufactured

by

Sony.

Polarity

of

the

plugs

of

other

manufacturers

may

be

different.

i

—

CASSETTE

PLAYER

SONY.

|

WM-150

SECTION

1

SERVICING

NOTE

This

set

detects

FF/REW

by

PM401

(photo

inter-

rupter).

FF/REW

cannot

be

detected

when

the

main

board

is

removed,

because

PM401

is

mount-

ed

on

the

main

board.

Therefore,

the

auto

off

cir-

cuit

and

tape

end

detection

will

misoperate.

Operation

check

for

FF

or

REW

can

be

done

by

the

method

shown

below

even

when

the

main

board

is

removed.

main

board

(side

B)

|

U

20

Hz

OdB(V)

(1

V)

SQUARE

WAVE

OSCILLATOR

@

This

set

cannot

operate

when

the

main

board

is

removed,

because

S401

(PLAY,

FF/REW

switch)

and

S402

(PLAY

switch)

are

mounted

on

the

main

board.

(S401

and

S402

are

linked

to

the

>

,

>>

and

44

buttons

in

the

mechanism

deck.)

Solder

jump-

er

points

for

S401

and

S402

are

provided

on

the

main

board.

Operation

check

in

the

mechanism

deck

and

volt-

age

check

can

be

performed

by

the

method

shown

below.

PLAY

mode

1.

Press

the

»

button.

|

2.

Solder

S401

and

$402

solder

jumper

points.

FF/REW

mode

1.

Press

the

>>

or

#4

button.

2.

Solder

S401

solder

jumper

points.

3.

Apply

the

square

wave

to

the

PH401.

(See

left

figure.)

main

board

(side

A)

Note)

After

checking,

be

sure

to

remove

the

solder

jumpers.

SECTION

2

GENERAL

LOCATION

AND

FUNCTION

OF

CONTROLS

DIR

(tape

transport

direction

CHANGE)

DUTTON

amu

MODE

(tape

transport

mode)

selector-~

DOLBY

NR

(Dolby

noise

reduction)

swith

BATT

REV/FWD

|

Why

(battery/tape

transport

directions)

indiCator————Fg

,

PHONES

(earphones)

jack

(stereo

minijack)

DBB

(dynamic

bass

boost)

selector

ae.

mom

A

/

PP

(fast

winding)

buttons

j

-—EESTOP

button

smn

W

PLAY

(playback)

button

sia

OPEN

(cassette

holder

open)

button.

VOLUME

control

pea

TAPE

selector

Battery

compartment

lid

gevommmnewoo

Battery

connector

points

SATE

A

AD

R80

RT

AD

ALD

RL

RE

RN

ALL

RIE

TTT

RN

RA

RD

AN

AR

TR

ART

RT AT

RAN

RT

RATT

Mt

TR

AN

RR

RT

RN

A

RAR

AF

IAL

A

NR

RT

a

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

con-

ductor

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

3

ADJUSTMENTS

3-1.

MECHANICAL

ADJUSTMENTS

PRECAUTION

1.

Clean

the

following

parts

with

a

denaturedalcohol-

moistened

swab:

playback

head

rubber

belts

capstan

©

idlers

pinch

roller

2.

Demagnetize

the

playback

head

with

a

head

demagne-

tizer.

: | |

3.

Do

not

use

a

magnetized

screwdriver

for

the

ad-

justments.

7

:

4.

After

the

adjustments,

apply

suitable

locking

compound

to

the

parts

adjusted,

5.

The

adjustments

should

be

performed

with

the

rated

power

supply

voltage

(1.3

V)

unless

otherwise

noted.

Torque

Measurement

[Mode

__[

Torque

Meter

[Meter

Reading

| 7

20-38

g-cm

FWD

Back

|

-

|

0.5—3.5

g-cm

Tension

— —

0.01-0.04

02-inch

|

20-38

g-cm

eee

0.28-0.52

oz-inch

CQ-102RB>

REV

Back

0.5—3.5

g-cm

Tension

0.01—0.04

oz-inch

EF

more

than

60

g-cin

:

~

more

than

0.84

oz-inch

CQ-201B

—

oT

more

than

60

g-cm

more

than

0.84

oz-inch

CQ-102C

Tape

Pulling

Force

Measurement

:

more

than

40

g

—CQ403A

more

than

1.41

oz

Pa

| |

more

than

40

g

:

CQ403R

more

than

1.41

oz

3-2,

ELECTRICAL

ADJUSTMENTS

|

TEST

TAPE

ee

WS-48A

3

kHz,0

dB

Tape

Speed

Adjustment

P-4-A100

10

kHz,

~10

dB

Playback

Head

Azimuth

:

P-4-A063

6.3

kHz,-10

dB

|

check

,

Playback

Level

P-4-L300

7

315

Hz,

0

dB

Adjustment

Playback

Head

Azimuth

Check

Note: This

set

is

not

featured

the

head

azimuth

ad-

justment.

|

When

replacing

the

head,

check

the

both

L-ch

and

R-ch

output

levels

and

also

those

phases.

Procedure:

1.

Playback

mode.

test

tape

P-4-A100

(10kHz,

-10dB)

PHONES

1)

Play

back

the

P-4-L100

in

FWD

mode

and

read

the

VTVM

(both

L-ch

and

R-ch).

2)

Change

to

REV

mode

and

read

the

VTVM.

(both

L-ch

and

R-ch).

3)

Confirm

that

the

level

difference

between

step

1

and

2

is

within

5

dB

(both

L-ch

and

R-ch).

2.

Phase

Check

test

tape

—

P-4-A063

(6.3kHz,

-10dB)

L-CH

18

oscilloscope

.

screen

pattern

DOOSO

in-phase

135°

=

180”

ee

ae

good

wrong

[—teeaor

Tape

Speed

Adjustment

Procedure:

test

tape

WS-48A

. . ;

(3kHz,

O0dB)

. |

frequency

counter

p=

PHONES

1,

Playback

WS-48A

(tape

center

portion)

in

FWD

mode.

Adjust

the

RV601

so

that

the

frequency

counter

reads”

3,000

Hz

+15

Hz.

|

my

2.

Playback

WS-48A

(tape

center

portion)

in

REV

mode.

Confirm

that

the

reading

of

frequency

counter

is

within

2.5%

from

the

reading

in

step

1.

Adjustment

Parts

Location

Diagram

MAIN

BOARD

(SIDE

A)

RV101___

wig!

~(L-CH)

‘S'

Playback

Level

Adjustment

DOLBY

NR

switch.

.........

ee

ay

OFF

VOis

HOO:

6s

2G.

-ahis

he

oR

a

Mo

a

minimum

DEB

switcha..

«oo

us

eae

ace

SX

NORM

TAPE

2.

ocx

«nk

bS

BO

oe

aE

EB

-

NORM

Procedure:

1,

Playback

mode.

test

tape

—

P-4-L300

-

(315

Hz,

0

dB)

—_—_

set

2.

Adjust

RV101(L-CH),

RV201(R-CH)

so

that

the

VTVM

reading

is

-32.7

+1.0dB(0.02

V-0.017V)

Adjustment

Location:

MAIN

BOARD

(SIDE

A)

—

VTVM

ae

ILL

to

TPL

—

aA

IL

+

to

TP

R

=«——-°

{

R-CH

|

z

WM-150

4-1.

SEMICONDUCTOR

LEAD

LAYOUTS

CXA1249M

LA4538TP1

LAG674F

8765

1234

(TOP

viEW)

TA7793FN-EL

TA7795FNER.

DTFC114TU

|

2SA1611-M6

2$B1295-UL6

XN1215

XN1401

XN1501

5

XN4608

6

+

t

4

Z

ro

6

4

1.

on

,

3 3

GL102R5S

an

Recs

Wns

7

Y

\)

4 a

ede

oie

NJL5161K-A

SECTION

DIAGRAMS

4

Note

on

Printed

Wiring

Boards

O———

:

parts

extracted

from

the

component

side.

@——__:

parts

extracted

from

the

conductor

side.

=

=:

parts

Mounted

on

the

conductor

side.

_&

indicates

side

identified

with

part

number.

=

1

Pattern

on

the

side

which

is

seen.

(SIDE

B)

:

Pattern

on

the

side.

(SIDE

A)

r

|

u

Note

on

Schematic

Diagram:

All

capacitors

are

in

wF

unless

otherwise

noted.

pF:

uwuF

SOWV

or:

less

are

not

indicated

except

for

electrolytics

and

tantalums.

All

resistors

are

in

&

and

“W

or

less

unless

otherwise

specified.

:

B+

bus.

[___]:

adjustment

for

repair.

Total

current

is

messured

with

no

cassette

installed.

Power

voltage

is

dc

1.3V

and

fed

with

regulated

dc

power

supply

from

battery

terminal.

Voltage

and

waveforms

are

de

with

respect

to

ground

under

no-signal

conditions.

no

mark:

PLAY

(

):

FF/REW

Voltages

are

taken

with

a

VOM

(50kQ/V).

Voltage

variations

may

be

noted

due

to

normal

produc-

tion

tolerances.

Signal

path.

>»

:

PB

Switch

Ref.

No.

Switch

S301

,

FWD/REV

$302

TAPE

DOLBY

NR

DBB

PLAY,

FF

REW

PLAY

SIDE

A

MAIN

BOARD

oe

ey

ae

Location

—

:

.

teeta

indies

RV301

e°

: |

$302

$303

;

TAPE

NORM—*Cr02/METAL

=

_

a

—-

[uw

Sacre

ee

aie

M901

|

MOTOR

)

RED

vio

¢

NC-6WM

:

4.2Vx1

|

RECHARGEABLE

BATT

WHT

|

i:

:

|

i

i.

i

|

tf

ee

a

|

ie

SCR

coe

snes

|

:

HP901

j

:

PB

HEAD

:

N

|

N

,

:

LiEWO)

N

:

N

.

see

CHAS

Sls

\

CHASSIS

.

RIREV}

N

LIREV)

{HEAD

CONNECTION

BOARD]

Suen

1

LUCEY

CLMAATL

AAMT

ES

ff

LLL

ELS

La:

CLL

OLE

ho

Lrg

Lat’

TOL...

EEE

ULL...

LILLE

SAASAAARRAASAAAAS

AA

So

AANARAA

SEAR

SEER

LAER

SS

LLL

LL

LLL

Low

pn

ZL

6

a

A

ESI

TTT

AT

a

A

Si

aT

Ti

Ia

TI

RTI

ale

aah

TR

A

BE

EE

eS

SA

Rai

i

AR

ORB

ea

a

sem

ma

a

aa

|

th

ie

eae

a

sk

Bk

eT

a

aha

Se

IR

kN

i

I

ark

ah

aac

ca

RR

a

A

a

ae

hl

EN

ia

a

Ee

A)

I

NOI

a

I

AE

a

A

a

ee

a

i

a

Esaki

la

I

ia

ne

a

hala

a

Rl

i

Oc

lin

Bi

Eg

BR

OE

al

nial

aahiernar

a.

aes

yore

ksh

banaae

col

e--ca

ila

ok

vues,

ea

“cguasckem

Walk.

4

Ramune

tome-atyensae

ibe

ai

-

Ey

1

tole

"Gt

al

chammerne

a

salad

;

:

EE

Se

A

He

A

Ht

A

SE

A

a

A

SS

a

SS

AS

SS

=

Ye

.

Bt

DOLBY

NR

B+].

2v

F

S

=

i=

J

-

ea

ce

|

=5

J

B

HP901

me

REY

eo

PB

HEAD

C)

fy

C

=

.

_

x

|

3x

RVIOI

|

mt

|Loss

[ay

_

|

“

ry.

7

[=

ST

238

-

|

)

fl

Z

|

L~|

HP901-2

"eat

ae

C

|

Heel

-8

8

@30S,

307

as

s

POWER

SWITCH

R~

HP901-4

y—o

2

;

—»-

|

es

2

|

Ss

2881295

B+]:

iJ

tC)

wg

.

S|

Bx

>

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i.

3

5a

av

D

oe

ie

15a

|

,

.

i?

5

min

C317

100p

<

ia

|

wy

=)

R20B

68k

2

S

2

I

oa

«

m

—

%

:

;

; f

a

“et

og

Mee

RV201

=

S

-

a)

|

a2

|

of

LEVEL

ADJA

=

2

3

E

a

|

fail

#s

3

t

.

y

uo

=

1

@303

XN1215

oe

=

|

2

@303

|

Q304

|

C2

S301

9302

MUTING

RIPPLE

FILTER

:

Or

(FWD/REV)

[TAPE]

<<

FWD

—=

REV

NORMAL

—*

Cr02/METAL

LI

©

=

.

RV601

F

-

oo

TAPE

SPEED

ADJ

_—"

|

MOTOR

SERVO

G

|

401,

Q402

.

Q403, Q405,

G406

VOL

REG

--TAPE

END

DET—

|

9402

-

9404-2

Ga

ike

A+]

AUTD

OFF

PREVENTION

R405

|

470K

:

~

@B02,

0803-1

©

Ga03-2

qao4

i

LED

DRIVE

REFRACTOR

DRIVE

|

MOTOR

SW!

TCH

PH401

A

&

NULSTAIK-A

!

a

=

ROTATION

DET

Q805-2_

8

3

Y

POWER

SW!

TCH

1S

.

2

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14.

15

|

16

|

47

SS

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—

.

|

RV101

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&

Be

,

RIOB

68k

.

{s

|

odes

‘ie

|

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€105

=

5

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av

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5s

=

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ws

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2.2k

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ri

<e

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DRIVE

|

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=

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|

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ee

:

eed

:

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|

ak.

BR

eens

:

ES:

yaaa

=

5S

@305.

0307

1

R206

=

as

POWER

SWITCH

,

us

«x

|

36

075

{4/8

3

|

Se

I

=e

S|

Be

=

C205

|

~

CrO2/

METAL

Q403.

A405,

@406

—TAPE

END

DET—

Q404-2

AUTO

OFF

PREVENTION

8t

Sef

ago5

|

Us

|

X-

XN1

401

C34

0403

(0-25)

=

xNA6D8

e,

co

oso4

(0)

xt

>)

|

>

XN1501

2m

;

‘

a

>

a

aeT

md

Q404

fet

TDTCIT4ZTU

R212

390k

4+C3tt

4.78

4V

C3G6

1000p

RIPPLE

FILTER

MUT

ING

MOTOR

SERVO

TOTAL

CURRENT

FWD

:

100mA

-

REV

:

100mA

FF

+

100mA

'REW

=

100mA

[B+]'-

sv

'

@802,

0803-1

- -

9803-2

LED

DRIVE

REFRACTOR

DRIVE

y—

@-

NS

—

QBO5~1

2s

MOTOR

SWITCH

A

ago5~2

POWER

SWITCH

NC-6MW

e8

1.2Vx1

2

.

RECHARGEABLE

BATT

o¥a,

|

Jo

R806

100

WM-150

4-4,

@

1C301

NFB~A

Vee

TA7795FN

OUT-A

ORV-A

F-IN-A

R-iIN-A

GNO

VREF

@

1C302

TA7793FN

B-IN

B

EK-IN

IC

BLOCK

DIAGRAM

‘DRV-8

OUT-B

NFB-B

F-IN-B

R-IN-8

8

OUT-B

SC~-IN

HPF-B

SC-IN

A

@

1C303

CXA-1249M

OUT-1 OUT-2

DET

IN

DET

OUT

HPF-A

REF

LPE-B

LPF-A

Vcc

TC

SW

VREF

M/N

F/R

-

Vee

HP~2

L.P-IN

LP

GAIN

@®

1C304

LA4583M

MUTE

POWER

SW

OUT-

GND

OUT-2

Vee

BASE

OSC

POWER

IN~|

PRE

IN-2

REF

RF-IN

RF-OUT

SWITCH

®

i1C601

LAG674F

GND

ON/OFF

vcc

MOTOR

REG

REF

COMP

IN

GND

@®PH701

NJL5161K-A

—

ww

S|

wn

>

OO

NOTE:

®

The

mechanical

parts:

with

no

reference

number

in

the

exploded

views

are

not

supplied.

®

The

construction

parts

of

an

assembled

»

part

are

indicated

with

a

collation

num-

ber

in

the

remark

column.

e

Items

marked

"*"'

are

not

stocked

since

they

are

seldom

required

for

routine

service.

Some

delay

should

be

antici-

pated

when

ordering

these

items.

|

SECTION

5

EXPLODED

VIEWS

Due

to

standardization,

parts

with

part

number.

suffix

-XX

and

-X

may

be

dif-

ferent

from

the

parts

specified

in

the

components

used

on

the

set.

Color

Indication

of

Appearance

Parts

Example:

(RED)

...KNOB,

BALANCE

(WHITE)

t

Cabinet's

Color

Parts

Color

5-1.

GENERAL

SECTION

Remark

$s

BOARD

ASSY,

TERMINAL

,

BATTERY

4

RV301

Part

No.

Description

Remarks

|

No.

Part

No.

Description

3-704-197-11

SCREW

(M1

.4X2.0),

NYLON

S

X-3348-123-]

ARM

ASSY,

CLICK

3-348-186-0!

KNOB

(DBB)

10

3-325-394-01

WASHER,

STOPPER

:

1

X-3348-122-1

HOLDER

ASSY,

BATTERY

3-342-380-01

(BLACK)...SHEET,

SPEED

HOLE

12

3-348-192-O01

LID,

BATTERY

CASE

3-342-380-21

(WHITE)...SHEET,

SPEED

HOLE

—

13

X~3348-113-1

3-348-187-01

KNOB

(TAPE)

14

3-704-197-31

SCREW

(M1

.4X3.0),

NYLON

3-704-197-51

SCREW

(M1.4X3.5),

NYLON

15

3-348-954-01

SHEET

(G),

INSULATING

-

16

3-348-946-01

BRACKET

(G)

X-3348-118-1

(BLACK)...CASE

ASSY

|

X-3348-120-1

(WHITE)...CASE

ASSY

19

3-348-196-01

ORNAMENT,

REEL

| |

20

3-704-197-01

SCREW

(M1.4X2),

TOOTHED

LOCK

3-704-260-01

SCREW

21

3-703-929-01

SPACER

(P)

X-3348-114-1

(BLACK)...LID

ASSY,

CASSETTE

23

3-348-964-01

PLATE,

GROUND

X-3348-116-1

(WHITE)...LID

ASSY,

CASSETTE

:

Boe.

90]

A-3070-246-A

MOUNTED

PCB,

AUDIO.

J301

1-565-436-11

JACK

(PHONES)

RV301

1-238-200-11

RES,

VAR,

CARBON

10K/10K

(VOLUME)

Sony WM-150 User manual

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