Toshiba Sb-m30 Mounting instructions

on

as

oe

SB-M30

1.

SYSTEM

CONTROLS

OQOda

aT

(I

|

“

¥

§

r

a

Sees

Figure

1

SB-M30

2.

OPERATING

CONTROLS

3.

DISASSEMBLY

INSTRUCTIONS

TREBLE

(3)

(2

MOneE

a)

owe.

ean

an!

SEE)

ESE

Eso

SUBSONIC

LOUONESS

m=

MONO

@

STEREO

ON

@OFF

BON

@

OFF

O

@

@)

4)

)

(1)

Power

switch

Depress

this

switch

to

turn

the

power

on,

depress

again

to

turn

the

power

off.

(2)

Phones

Plug

into

this

jack

when

listening

through

headphones.

(3)

Speaker

selector

Speakers

A

and

B

can

be

operated

independently.

Relation

of

speaker

switches

to

sound

output.

1

N

Speakers

A,

B

Speaker

B

Note:

When

either

speaker

A

or

B

is

connected

to

the

amplifier,

if

both

switches

A

and

B

are

depressed,

sound

from

the

speaker

will

be

cut

off.

(4)

Bass

and

treble

controls

Turn

these

knobs

clockwise

from

the

centre

zero

(flat)

position

to

emphasize

bass

or

treble.

Turn

counter-

clockwise

to

attenuate

(decrease)

bass

or

treble.

(65)

Balance

control

Turn

this

knob

to

adjust

volume

balance

between

left

and

right

speakers.

(6)

Mode

switch

Set

this

switch

to

the

mono

(depressed)

position

for

monaural

reproduction

when

the

input

signal

is

monaral

or

to

convert

a

stereo

input

signal

to

mon-

aural

form.

Otherwise

keep

the

switch

in

the

stereo

©

Figure

2

D®

©

(normal)

position.

Note:

When

this

switch

is

in

the

mono

posiiton,

the

REC

out

output

is

also

mono.

(7)

Subsonic

filter

Depress

this

switch

to

reduce

noise

at

very

low

fre-

quencies

caused

by

warps

in

a

disc.

Loudness

switch

Depress

this

switch

for

listening

at

very

low

volume

levels.

The

loudness

circuit

emphasizes

the

low

and

high

frequency

regions

for

a

natural

tonal

balance

at

low

volume

levels.

(This

switch

is

effective

between

the

zero

and

midpoint

positions

of

the

volume

knob.)

(9)

Funciton

selectors

Choose

the

desired

programme

source

by

pressing

one

of

these

buttons:

PHONO:

For

a

turntable

TUNER:

For

a

tuner

AUX:

For

any

kind

of

audio

equipment

(excluding

turntables

and

microphones)

TAPE

1:

For

the

tape

deck

connected

to

the

TAPE

1

terminals.

Volume

Turn

this

knob

to

adjust

the

volume

level.

()

Function

indicators

(2

TAPE

2

indicator

(3

TAPE

2

switch

Depress

this

switch

for

playback

or

recording

with

the

tape

deck

connected

to

the

TAPE

2

terminals.

TOP

COVER

REMOVAL

1.

Remove

six

screws

(A)(3¢

x

6mm),

(3¢

x

6mm)

and

()(3¢

x

6mm),

and

the

top

cover

can

be

re-

moved

from

the

unit.

(See

Figure

3,

4

and

5)

Figure

3

FRONT

PANEL

REMOVAL

1.

Remove

top

cover.

(See

Figure

3, 4,

and

5)

2.

Remove

seven

screws

(©)

(3¢

x

8mm)

and

©

(3¢x

8mm),

and

the

front

panel

can

be

removed

from

the

unit.

(See

Figure

6

and

7)

»

TINT,

{

|

@

|

¢

BOTTOM

PLATE

REMOVAL

1.

Remove

four

screw

()

(3x

8mm),

and

the

bottom

plate

can

be

removed

from

the

unit.

(See

Figure

8)

Figure

4

Figure

6

Figure

8

SB-M30

4.ELECTRICAL

PARTS

LOCATIONS

Control

PRC.

Board

PS

;

E

s

5

—

13)5

z

x

Me

nlalz

VOLUME

Switch

PC.

Board

5

?

IC

Lian

es

al

ee

a

ar

7]

BLU/WHT

aa

Lt

[12.3V

|

nn

‘

:

_F

OV

‘

x

|

BRN/WHT

__}

:

OV

—--

2h

——

og

“oe

Atos

0s

es

ae

Ne

as

SE

LOUDNESS

SUBSONIC

MODE

30"

C40

‘e+——*

C40

eypecaz®:

RED/WHT

|

.

Ov

25]

VLT/WHT

Function

Switch

P.

C.

Board

od

x

>

“

z

4

0)

BRN/

WHT

TRANS

FORMER

(TU

AY)

RED/

WHT

D35

fs

af

034

fy

250V

T2A

TRANS

FORMER

Fi

-——4

(TU

AY)

|

CP

300

214

i

Tesv

|

e7Vv

0.6v

|9|

(PX)

[Blov

|

8.7v

|

0.6v

[iO

C7

youkew

faia.7Vv

[0.6

Ii]

RN

/WHT

[8.7V

|

|_0.6V

|

Fuse

P.

C.

Board

B

Tov.

li23v

14]

eiasca

Oe

Ee

a

ee

OS

.

QIO

Q29

E

Coe

|

eh

see

R27

e[ov

|

ee

j

;

|

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A

c/

Ov

z

$

wo.

R28

|

afov

|

x

l

=D

er

ps

STEO

5103

a

7

pe

Lr

=

Shes

|

i:

a

me

-

fajizsv

|

[elizsv]

Q8

=

:

fe

|-39.1V]

|

(ev

oes

Oe

|

Pa

el

ov

|

Tet-se6y]

|

ory

|

bi

a6

m

,

irae

Fuse

P.

C

Board

|

Bas

Se

ee

OPO

e

ae

a

ee

aus

eS

te,

Ses

Ce

Ge

ge

Ge

ee

tg

OE

Pe

ES

ey

ee

BRN/WHT

RED/WHT

Phone

Jack

+

aia

|

-

4

|

P

C.

Board

a

|

bea

2

$5"

.

|

:

fe

[30.6v

|

Bi

3iv_

|

QIs5

lov

Q!9

PC.

Board

BRN/WHT

O6V

-42V

Lev

i

-12V

IC]

Ov

-0,6V

Speaker

Terminal

Main

Amp

PC.Board

I

7 |

021

QI3

ag

Qi7

Q21

KK)

|?

Q23

feETov

|

[E|O.6V_

|

AN,

E;OV

|

SPEAKER

TERMINAL

Speaker

Switch

PC.Board

lIsjov

|

{Bloev

|

[Bj.ev_

|]

[Bloéev

|

'BI-0.6V

|

SB-M30

5.

SCHEMATIC

DIAGRAM

©

aE

0

eee

Se

nods

rozaseee

—

pease

Faw:

25A992

'

!

11OKx5

jLOKxS

’

2SA999

L.4

CS

5550

L4

d.

-

---

-

4

E

2SC1845

cece

eee

ee

C5

2SC2320

S|

8]

81

8

I

3

e)

io)

fo)

4

pe

a

=

B|

8,

8] 81

8

:

-:

aes

Be

ee

eee

ae

a

ee

VR4L

C26.

VR4R

C24

ace,

Gane

reer

ell

00K

0.

100K

0.0068

<a

=

-

(|

>

Saas

i

Gaz

es

oe

eel

aa

LNOZO4GP3

bone

eee

|

[SP

TERMINAL

aren

ICl

LA6458SS

|

34

by

bnibn

bn

dy!

i

|

(

)-VF,AY

Leh

Signal]

!

E

0.00!

p3g

Tie

a

|

a

as

zscop

ICliIZ2)

eGuuueu)

LNO2ZO4RP2

s7

sé!

|[s5_|s4_[s3}

-

\

(100)

peti

2

«EOF

eT

ae

peas

;

-

Q9,10,15,16

QlI~I4

2

a

2SA733(ANQ,PY/2SAII27NCIR,S)

2SC945(ANQ,P/2SCI6

GGG00e60

-——_——_—-

-

|

i

(AXQ,PVe

Pe

reas

2SC2590

ae

=

Q17,18

Rch

Signal

2SC2590KR,S)

Q19,20

RIG

3-3K

2SAI1I0¢R,S)!

8)

pe

ACI

Te

Se

Q21,22

l

ISH

4

2502580)

*

|

Se

esice

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Saas

ad

5

SS

ene

ye

oa

2SAI105

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2SC2580

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|

OS

5

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ee)

2S)

cue

Os

:

ee

SF

5

A

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is

ens

Co

a,

Uy

En

Os

A,

cs

ee

es

ne

rs

oe

ee

Cae

(

f

LA6458SS

'

©39,40

|

mito

9

TE

only

ponies

|

'DI~4

\IS2076

l

ae

|

4

M54516P

ee

es

AO

2SAl105

«1

|

‘

C42

(0.1)

0.47

17

°

JIO

np

ae

x

OUDNE

SS

DII~14

LC4066BH

S3V20

it]

T=

2

R51

100

Ww

VR2

200K

030

1$2076

RDI8E(B2)

a

-16.9V

|

,

cea

Q25

026

Q27,28

Ot

2SCZI67(0,Y)

_2SA957(0,Y)

_2SA9991E,F)

2SC945(ANQ,P)/2SC2320(E,F)

/2SCI685(R,S)

|

—

——

LL.

.

-

032,33

=

A

RDI

2E(B2)

Switch

(

Position)

OWER

POW

SH

ee.

_

|

<CONTROL

UNIT>

a

933

ww

[BALANCE]

POWER

SUPPLY

VF

Sl

«Mode

Switch----------~----

STEREO

ses

ICI

1C2

S2-a:

Subsonic

Switch------~----

OFF

&

EE

eT

Ta]

S2-b:

Loudness

Switch

----------

OFF

ne

pf

2

Se

Ta

Er

ES

a

cea

Ne

ee

Bee

a

f.sv[

ov

|

ov

[oy

pesvy

ov

ee

wite

:

103

S4

Tuner

Switch------------

OFF

;

‘

Aux

<SWitch--=-9s5

4

es5-:

OFF

te

ee

a

ee

bau

cl

ov

[ov

|

ov

[ov

7

i2.av]

i2.2v[i2.4v

SG

:

Tape

|

Switch-----------

OFF

gai

pte

|

ee

S7

Tape

2

Switch-------------

OFF

nize

one

ene

coy

ar

(ACCESSORY

UNIT)

——

es

ee

Sl-a

?

Speaker

A

Switch----------

ON

AC

OUTLET

:

a

aor

bay

pe

aw

ea

S!-b

2

Speaker

B

Switch--~-~----

OFF

Ace

MEO

eae

AY,TU

:

AC240V

ae

se

SO2

:

Voltage

Select

Switch(

VF)---—

220~240V

~240V

TE:

AC220V

Hts

rer

Luwtov

|

ov

[ov

|

ov]

yeeren

The

A,

mark,

the

symbol

No.

circled

with

oval

in

the

schematic

diagram

and

the

shaded

area

in

the

parts

list

designate

components

which

have

special

characteristics

important

for

safety

and

should

by

replaced

only

with

types

identical

to

those

in

the

original

circuit

or

specified

ye

in

the

parts

list.

SB-M30

6.IDLE

CURRENT

ADJUSTMENTS

8.

EXPLODED

VIEW

CABINET

(Left

Channel)

Adjust

the

resistance

value

of

VR1

so

that

idle

current

is

50mA

(voltage

22mV)

between

A

and

B

of

TEST

POINT

R49.

(Right

Channel)

Adjust

the

resistnace

value

of

VR2

so

that

idle

current

is

5}0mA

(voltage

22mV)

between

C

and

D

of

TEST

POINT

R50.

LESTER

319

Speaker

Terminal

PC.Board

Control

PC

Board

Main

Amp

PC.Board

I

Speaker

Switch

PC.Board

|

R.ch

PHONO

O

(oe

INPUT

SELECTOR

PRE

MAIN

een!

,

Cn

enti

OUT

TAPE

1,2

SUBSONIC

TUNER

AUX

SP

_

©

OS.P

pens

OUT

Wf)

PHONE

TAPE

|

nec

Volume

|

Function

Switch

PC.Board

REC

TAPE

2

PLAY

BASS

TREBLE

POWER

Sw

C7

AVR

POWER

Ee

CF

ac

(LOW)

(HIGH)

Higu

|

SUPPLY

NOTE:

Parts

excluded

in

the

parts

list

are

not

stocked

since

they

are

seldom

required

for

routine

service.

Some

delay

should

be

anticipated

when

ordering

these

items.

SB-M30

ene

9.

(CABINET)

PARTS

LIST

The

A\

mark,

the

symbol

No.

circled

with

oval

in

the

schematic

diagram

and

the

shaded

area

in

the

parts

list

designate

components

which

have

special

characteristics

important

for

safety

and

should

by

replaced

only

with

types

identical

to

those

in

the

original

circuit

or

specified

in

the

parts

list.

Symbol

rare

>ympo!

Part

No.

Description

bes

Part

No.

Description

No.

301

Panel

Ass’y

22825239

22838194

|

Decoration

Plate

Escutcheon

22883067

22824460

|

Knob

Ass’y,

Power

22826413

|

Knob,

Volume

22826414

|

Knob,

Treble/Bass

22884321

|

Knob,

Mode/Subsonic/-

Loudness

Knob,

Speaker

Knob,

Balance

Knob

Ass‘y,

Phono/Tuner/-

AUX/Tape-1/Tape-2

Top

Cover

Jack

Plate

(TE)

Jack

Plate

(TU,

AY)

Jack

Plate

(VF)

22884322

22826415

22826416

22841391.

22841354

22841355

22841356

22828090

22828091

22705026

22707066

22707490

Foot,

Left

Foot,

Right

Plastic

Rivet,

3¢

x

6mm

Screw,

36

x

6mm,

BID

Screw,

36

x

6mm,

BID

Tapping

Screw,

3¢

x

8mm,

BID

Tapping

Screw,

3¢

x

10mm,

BID

Tapping

screw,

4¢

x

10mm,

BID

Tapping

Screw,

Ground

22707911

22707165

22707269

22708058

SB-M30

ee

10.

PARTS

LIST.

The

A\

mark,

the

symbol

No.

circled

with

oval

in

the

schematic

diagram

and

the

shaded

area

in

the

parts

list

designate

components

which

have

special

characteristics

important

for

safety

and

should

by

replaced

only

with

types

identical

to

those

in

the

original

circuit

or

specified

in

the

parts

list.

Symbol

No.

TRANSISTOR,

IC’S

&

DIODES

Description

CONTROL

UNIT

22115882

1$2076A

MAIN

AMP

UNIT

22117256

|

Transistor,

2SA992-F/E

22115887

GMAO1-F

Y1

22115451

182076

22117262

|

Transistor,

2SC1845-F/E

22114206

|

Transistor,

2SA733A-Q/P

22115755

RD12E-B2

22115897

LED,

LNO204GP3

22114768

|

Transistor,

2SC945A-Q/P

22115898

LED,

LNO204RP2

22117267

|

Transistor,

2SC2590-R/S

22117259

|

Transistor,

2SA1110-R/S

22117322

|

Transistor,

2SC2580

*1

22117323

|

Transistor,

2SA1105

*1

22117263

|

Transistor,

2SC2167-0/Y

22117255

|

Transistor,

2SA957-0/Y

22117246

|

Transistor,

2SA999-E/F

22117264

|

Transistor,

2SC2320-E/F

FUSE

UNIT

22115894

|

Diode,

WO6B

22117271

|

IC,

LA6458SS

22117278

|

IC,

LC7815H

22117277

|

IC,

LC4066BH

22117279

|

IC,

M54516P

PP>b

bPPpBb

22165036

|

Fuse

Holder

(TE,

TU,

AY)

22165093

|

Fuse

Holder

(VF)

MAIN

AMP

UNIT

22115882

|

Diode,

152076A

Lali

22115539

|

Diode,

RD18E-B2

A7246703

|

Diode,

1$1555V

22196332

|

Push

Switch,

Mode

22196335

|

Push

Switch,

Subsonic/-

Loudness

22196327

|

Key

Switch,

Phono/Tuner/-

AUX/Tape-1/Tape

-2

"22115424

|

Diode,

STV-4H

22115947

RD13E-B2

LAG

=

|

SB-M30

Symbol

th

JO02,

03

92198053

|

Jack,

4P,

Tape-1/Tape-2

C41,

42

22371104

|

MY,

0.1mfd,

50V,

J

(TE)

Jo4

22198055

|

Jack,

6P,

Input

22371473

|

MY,

0.047mfd,

50V,

J

22210188

Coil,

0.55uH

(TE)

ACCESSORY

UNITS

22

196333

22198050

22198060

22162522

Push

Switch,

Speaker

Jack,

2P,

Phones

Jack,

6¢,

Headphones

Terminal,

8P,

Speaker

CAPACITORS

22486220

|

EL,

22mfd,

25V

22448331

|

EL,

330mfd,

50V

22488470

|

EL,

47mfd,

50V

22488109

22488479

22488100

22362221

22362101

22349222

22349561

22485470

22371123

22371332

22488229

22488108

22371333

22371153

(TU,

AY,

VF)

EL,

1mfd,

50V

EL,

10mfd,

50V

CD,

220pF,

50V,

J

(TE,

TU)

CD,

100pF,

50V,

J

(AY,

VF)

CD,

2200pF,

50V,

K

(TE,

TU}

CD,

560pF,

50V,

K

(AY,

VF)

EL,

47mfd,

10V

MY,

0.012mfd,

50V,

J

MY,

3300pF,

50V,

J

EL,

2.2mfd,

50V

EL,

0.imfd,

50V

MY,

0.033mfd,

50V,

J

MY,

0.015mfd,

50V,

J

22371683

|

MY,

0.068mfd,

50V,

J

22371682

|

MY,

6800pF,

50V,

J

=

+5%.

K

=

10%,

N

=

30%,

P

=

-0

+

100%,

=

—20

+

80%

22488109

22362221

22483470

22362101

22349681

|

22362181

22361180

22361509

92486220

22486220

22483470

22488101

22371104

ABBREVIATIONS:

CD=Ceramic

Disk,

EL=

Electrolytic

BL

=

Barrier

Layer,

MY

=

Mylar

EL,

Imfd,

50V

CD,

220pF,

50V,

J

EL,

47mfd,

10V

CD,

100pF,

50V,

J

CD,

680pF,

50V,

J

CD,

180pF,

50V,

J

CD,

18pF,

50V,

J

CD,

5pF,

50V,

J

EL,

22mfd,

25V

EL,

22mfd,

35V

EL,

47mfd,

10V

EL,

47mfd,

10V

EL,

100mfd,

50V

MY,

0.1mfd,

50V,

J

(TE)

4s

22371333

22362390

22362181

22488109

22360721

22486102

22371473

22343103

22349561

22349103

MY,

0.033mftd,

50V,

J

CD,

39pF,

50V,

J

CD,

180pF,

50V,

J

EL,

1mfd,

50V

BL,

1000pF,

25V,

N

BL,

1000pF,

25V,

N

BL,

1000pF,

25V,

N

EL,

1000mfd,

16V

MY,

0.047mfd,

50V,

J

CD,

0.01mfd,

50V,

Z

CD,

0.01mfd,

50V,

Z

CD,

560pF,

50V,

K

(TE,

TU)

CD,

560pF,

50V,

K

(TE,

TU)

CD,

560pF,

50V,

K

(TE,

TU)

CD,

560pF,

50V,

K

(TE,

TU)

CD,

0.01mfd,

50V,

J

FUSE

UNIT

22488470

22349103

EL,

47mfd,

50V

CD,

0.01mfd,

50V,

Z

noted.

22658730

22545102

22545104

22545471

22545681

22545822

22545272

22545181

22545183

22545823

22545271

22545222

22545123

22545562

22545822

22545223

22570280

225/0281

22545330

22545221

22545331

(22545182

22545182

22545681

22570295

22545820

22545153

22545331

22570312

22570279

22570312

22545822

22545331

RESISTORS

All

resistors

are

carbon

film,

1/4W,

+5%

unless

otherwise

1K

ohm

=

1000

ohm,

1M

ohm

=

1000000

ohm

MAIN

AMP

UNIT

200

ohm,

Semi-fixed

Variable

1K

ohm

100K

ohm

470

ohm

(TE)

620

ohm

7.5K

ohm

2.7K

ohm

2.7K

ohm

180

ohm,

18K

ohm

82K

ohm

270

ohm,

2.2K

ohm

11K

ohm

5.6K

ohm,

7.5K

ohm,

24K

ohm,

3.3K

ohm,

1W,

Metal

Oxide

Film

3.9K

ohm,

1W,

Metal

Oxide

Film

33

ohm,

33

ohm,

220

ohm,

330

ohm,

330

oh

1.8K

ohm,

1.8K

ohm,

680

ohm,

680

ohm,

10

ohm,

2W,

Metal

Oxide

Film

82

ohm,

15K

ohm,

15K

ohm,

330

ohm,

270

ohm,

2W,

Metal

Oxide

Film

2.7K

ohm,

1W,

Metal

Oxide

Film

270

ohm,

2W,

Meta!

Oxide

Film

7.5K

ohm,

330

ohm,

Sy

mbol

No.

~12~

Part

No.

22545363

22545224

22545223

22545820

22545104

22545331

Description

36K

ohm,

220K

ohm

24K

ohm,

82

ohm,

100K

ohm

330

ohm,

CONTROL

UNIT

22651590

22657296

22657297

22545102

22545101

22545473

22545101

22545391

22545271

22545223

22545563

22545332

22545122

22545334

22545182

22545122

22545822

22545242

22545681

22130721

22545333

22545272

22545122

22545333

22545472

22545224

22545105

22545333

22570250

22545104

100K

ohm

Volume

|

200K

ohm

100K

ohm

100K

ohm

s

Ul

x

2,

Variable,

,

Variable,

Balance

_

Variable,

Treble

_

Variable,

Bass

1K

ohm

(TE,

TU)

100

ohm

(AY,

VF)

47K

ohm,

100

ohm,

.

390

ohm,

270

ohm

22K

ohm

56K

ohm

3.3K

ohm,

1.1K

ohm,

1.1K

ohm,

1.1K

ohm,

1.1K

ohm,

330K

ohm.

1.8K

ohm

1.1K

ohm,

8.2K

ohm,

2.4K

ohm,

680

ohm,

Composite

33K

ohm,

2.7K

ohm,

1.3K

ohm,

33K

ohm,

4.7K

ohm

220K

ohm,

1M

ohm,

33K

ohm,

100

ohm,

1

Film

100K

ohm,

Part,

10K

ohm

x

5

W,

Metal

Oxide

|

SB-M30

Symbol

bol

FUSE UNIT

R1

22570153

|

1.2K

ohm,

2W,

Meta!

Oxide

Film

R3,

4

22555479

|;

4.7

ohm,

ACCESSORY

UNITS

Ri,

2

22555479

4.7

ohm

(TE)

R3,

4

22570313

330

ohm,

2W,

Metal

Oxide

Film

ACCESSORIES

ACO1

22903773

Owner’s

Manual

(TE)

ACO1

22903774

Owner’s

Manual

(TU,

AY)

ACO1

22903775

Owner’s

Manual

(VF}

ACO2

22164300

Adapter,

AC

Plug

(VF)

ae

fe

ee

Toshiba SB-M30 Mounting instructions

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