Toshiba SB-M30 Mounting instructions

on
as
oe

SB-M30
1. SYSTEM CONTROLS
OQOda
aT
(I |
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r
a
Sees
Figure 1

SB-M30 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 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 ; | eL-seev) A c/ Ov
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ps STEO 5103 a 7 pe Lr
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|
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
BRN/WHT
BRN/WHT
BRN/WHT
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 SB-M30
5.
SCHEMATIC
DIAGRAM
© aE 0 eee 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] 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)
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|
Se
esice
S208 i
sl
Saas
ad
5 SS ene ye oa 2SAI105
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8
| OS 5 i 0 ee) 2S) cue Os : ee SF 5 A Oe, 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 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 OUT
TAPE 1,2 SUBSONIC
TUNER
AUX SP
_ © OS.P
pens
OUT
Wf) PHONE
TAPE |
nec
Volume
|
Function
Switch
PC.Board
PC.Board
REC
TAPE 2
PLAY
BASS TREBLE
POWER Sw
C7
AVR 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. 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 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
J
=
+5%.
K
=
10%,
N
=
30%,
P
=
-0
+
100%,
=
—20
+
80%
22488109
22362221
22483470
22362101
22349681 |
22362181
22361180
22361509
92486220
22486220
22483470
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
22360721
22360721
22486102
22371473
22343103
22343103
22349561
22349561
22349561
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
22545272
22545181
22545183
22545823
22545271
22545222
22545123
22545562
22545822
22545223
22570280
225/0281
22545330
22545330
22545221
22545331
22545331
(22545182
22545182
22545681
22545681
22570295
22545820
22545153
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
22657297
22545102
22545101
22545473
22545101
22545391
22545271
22545223
22545563
22545332
22545122
22545122
22545122
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