Toshiba SB-620 Service manual
r
)/
.' 1 f
.',f ,-
/l
:.'ra'L<
(
J
a
4et'1,.
';\
!.e:(..
v
SEFIVICE
FfLE
NCl. 17g,-c,37
DATA
T@SHIBA
STEREO
SB-Gil
\/
AMPLIFIER
2@
v
v
t
v
Èr
CONTENTS
OPERATING CONTROLS
DISASSEMB
ADJUSTMENT
BLOCK DIAGRAM
ELECTRICAL PARTS LOCATIONS
SCHEMATIC
EXPLODffi VIEW
PARTS
INSTRUCTIONS
LY
INSTRUCTIONS
DIAGRAM
..
7-
15-
3
o
4
5
6
12
13
14
19
g
t
|#
-2-
v
Treble
Control Knob
Treble
Turnover
Bass Turnover
Bass Control Knob
Selection
Selection Knob
Knob
OPERATING
CONTROLS
Balance
Function
Muting
Volume
Control
Knob
Control Knob
Knob"
Knob
i
It
il
I'
T
I
H
,,
Power
Knob
,*#i
ffi;1
Headphones
Speaker
Low-filter Knob
High-filter Knob
\l
Loudness Knob
Mode
AUX
Tuner Jack
Phono
Ground
Jack
Selection Knob
Selection Knob
Jacks
Jacks
Terminals
ii
-.....Æi
11î11:11
trîPii:f:,i,jti.fffi,
Figure 1.
Tape Duplicate
Tape
Monitor
Speaker
AC Outlets
Selection Knob
Terminals
Knob
(For
Canada)
i
Cord
rl
Rec. Jacks
Play Jacks
DIN
Jack
Figure
Figure
3-
2.
3.
Voltage
Power
Fuse
Power
Cord
Selection
(Fore
Switch
Power
Main
Pre
Europe,
ln Jack
Out Jack
England,
Sweden)
/
I
{ ,t
\fl
/,
DISASSEMBLY
INSTRUCTIONS
TOP COVER
1. Remove
See
four screws
figure
@o--
@,ru-
FRONT
1.
2. Remove three screws
3.
PANEL REMOVAL
Pull out the six knobs
Remove three
REMOVAL
4.
screws
(@).
Figure
(@).
(@).
(@).
4.
S..
See
See
figure
figure
figure
6.
7.
8.
--@@
-_@@@
BOTTOM
Remove five
1.
figure
See
COVER
screws
5.
REMOVAL
(@).
Figure
.J
Vr
5.
Figure 6.
\J
Figure
7.
-4-
Figure
8.
v
ADJUSTMENTS INSTRUCTIONS
s8-620
1. Power
Voltage
1. Connect
3P SOCKET which is connected
3P SOCKET into TONE P.C.
2. Turn
After finishing voltage
3.
Board
4.
After adjustment, fix
Adjustment
positive
the
VR01
on SUPPLY P.C.
@.
(+)
the screw.
ORAN
B
lead
of a meter
to
Board
Board with screwdriver, and
adjustment, remove
which allows to measure DC140V to orange colored
TONE
anO
@
DC 150V - 300V
RANGE METER
SCREW
TO CH
P.C.
Board and
connect its clip
adjust
the equipment
LOCK
negative lead
to chassis.)
it
so the
insert
and
SCREW
DRIVER
terminal
to blue colored terminal.
reading
3P SOCKET
on meter
@
is
140V.
into
TONE
of
(lnsert
P.C.
2. ldle
Current Adjustment
1.
Connect a meter
2. fhe allowable
3. Adjustment must
4.
After adjustment,
FROM
P.C.
to
voltage range
be
DC0.01V
O.O3V RANGEMETER
BOARD
test
mode
fix
the screw.
MOTHER
point
and adjust VR01
is from
on
both channels.
or
0.0033V
TONE P.C.
BOARD
SERVICEINN.
EQUIPMENT
with screwdriver
to 0.0055V.
$r.r=*
so the reading
DRT'ER
Figure 9.
on meter is
0.0044V.
L.*
Figure
10.
SCREW
LOCK
s8-620
f--,
I
L__
-
BLOCK
eoaùpr
DIAGRAM
*!,
v.
trEi
SÆreR A
v
+-
REC
SÆAKER B
--l
tr-
lfnn
rlllrl
i
llli
illli
;lll--
l3'o"rtrr
i | |
il | _Â..ft.-
|
|
s2 sf I
22ov
-
|
I I
l--.r-l
l
L_____ql_
t
_
rAp€z
-
S l-a
S 2-a
S 3-a
S4
S 5-a
S 6-a
S 7-a
S B-a
S 9-a
510-a
511-a
FUNCTION
-d
TAPE
-b
DUPLICATE
-d
MODE
MUTING
-b
LOUDNESS
-b
TURNOVER
-b
TURNOVER
-b
HIGH FILTER
-b
b
LOW FILTER
b
SPEAKERS
-
-MONITOR
(STEREO.
_ !<l
+
-J
(PHONO
(TAPE
(-10
dB,
(OFF,
(TREBLE)
(BASS)
(8
(3O
(OFF,
aC2zOn4Ov
te-op. E"o,ono
-
(TAPE
MONO}
kHz,
Hz,
A.
I
L
SOAZ '
I
s""ae"r
I
|
l
02, PHONO
1,
SOURCE,
2 1,
OFF, TAPE 1
OFF, -20 dB)
ON}
(2.5
kqz,
(400
Hz. DEFEAT,
OFF,
20
OFF. 15
B. A+B}
01,
TUNER,
TAPE 2)
DEFEAT,
kHz)
Hz)
AUX
2I
kHz)
5
2OO Hzl
1,
AUX
\)
2}
w
-6-
v
v
ELECTRICAL
PARTS
LOCATIONS
v
I
speoker
to
rermlno
Tronsformer
to
I
f
L
f
I
Figure
9.
Solder Side
of
Speaker
@
@
J;JI
fcos I
il
P.C. Board
l::,,
ORG
r.l |_-
I
::F
tr+
ORGI.-
rrr
lll
Ground
Îo
]l,o,,.*
v
Figure
10.
Solder Side of
Power
Supply
Amplifier P.C.
-7-
Board
(SPLY-C33)
I
i,
l,
I
l,
,
/'l
t!
i
MUTTNG
to
PcB
{
POWER
SW
onty)
PCA
(Conddo
Figure
11. Solder
Side of Muting
cra
,
?È.ct6
É-l
F+
:::
i :::
:
;:;rCral
:;:
::
,
:Ër{
È-if
:I.808
=Ë=M
RL?
f-ÀlH
RA4
.iK
-56'
P.C.
Board
Figure
12.
Solder
&
Solder
Side of Power
Side
of
VR-P.C.
Switch
p.C.
Board
Board
To FILT-COB
\2,'
v
Figure
13.
Solder
Side of
EO-Amptifier
p.C.
-8-
Board
|z
(AF-C64)
Loading...