Technics ST-X302L - SCHEMATIC DIAGRAM: POWER SUPPLY; POWER SUPPLY CIRCUIT DIAGRAMS

ST-X302L ST-X302L
10
11
12 13
14 15
16
(This
schematic
diagram
may
be
modified
at
any
time
with
the
development
of
new
technology.)
Notes:
e$701:
Voltage
select
switch
in
“240
V"
position.
(110
V/127 V/220
V/240
V)
for
(GC)
only
eS913:
Band
select
(MW)
switch.
0S914: Band select (LW) switch.
0S915: Memory switch.
S916: Tuning mode select switch.
Q205
2SC3311AQSTA
BUFFER
AMP
Stee
“e508
ana
vy
ea6iied
S917:
FM
mode
select
switch.
sane
2SC33I1AQSTA
0$918:
Preset-channel
(A)
switch.
228
136°
ds
S919:
Preset-channel
(¥)
switch.
ogee
aaa
T
;
DS)
bch
$920:
Band
select
(FM)
switch.
igeeiay
wwe
hal
Tale
38
|
e$921:
Power
switch.
@,
EM
mone
£306
R306
So
wy
9205
distortion
adj
50V33_
3.3K
Ps
“
i
K301
0S922:
Sleep
switch.
ee,
/
ee
:
SUL
0$923:
Cancel
switch.
Sty:
PLL
0$924:
Stand-by
switch.
Bs!
|
L@-@-@-+~8-O-0-9-©
ne
i
A)
Ren
S925:
Read
switch.
rhe
ype
a
ee
Pe
Ey
gm
kn
38
©S926:
Clock
set
switch.
;
er
aaa
case
eg.
iba
atau
%
70
Joy
$927:
Timer
set
switch.
FM
offset
.|
8)
oo
tn
7
Lee
©S928:
Select
(¥)
switch.
voltage
een
3
S929:
Select
(A)
switch
(OmvV
)
sys
35
sex
FM
MPX
:
;
14
BV—
ol
gs
ait
:
;
~
waesTA
asreik
fers
Indicated
voltage
values
are
the
standard
values
for
the
unit
measured
by
the
DC
electronic
circuit
FM
MPX
VCO
adj
=
REWATESOUT
eas:
5 :
; ;
oon
iSoSRKberA.
tester
(high-impedance)
with
the
chassis
taken
as
standard.
Therefore,
there
may
exist
some
errors
in
R227
100K
‘
&
MUTING
CONT
&
oon
the
voltage
values,
depending
on
the
internal
impedance
of
the
DC
circuit
tester.
g o
DTCI44ESTP
;
°
eiecaRR
al
2
SWitciinen
oi
):
MW
soir
a
"al
]:
LW
voltage
(REMOTE)
:
muting
voltage
b
V
a204
su
c
a
\
i
system
o
Positive
voltage
lines
(+)
:
AF
signal
lines
289C331/AQSTA
«
>
CONTROL
OUT
:
|
SIGNAL
RECEIVE
DET.
F
2
:
=o,
———=—=—=—
Negative
voltage
lines
(—)
cb
2
Bg
Sey
cxooD
FM
OSC
<===>
FM
signal
:
°:
uaan>
AM
OSC
aaam>
AM
signal
b
¥
qd
hen
ag9lo0
POWER
SUPPLY
CIRCUIT
FOR
(E,EB,EF,GNJ
AREAS.
eimportant
safety
notice
.
Components
identified
by
A,
mark
have
special
characteristics
important
for
safety.
When
replacing
ay
ox
ou
&
any
of
these
components,
use
only
manufacturer's
specified
parts.
CN7TOIB CN701 ta
abe
(5
}{5)
ARLY701
er
a910
Yeap
i
3
<ise
2SC3311AQSTA
He)
*Caution!
SWITCHING
aig
.
ea
CONTROL
IC
and
LSI
are
sensitive
to
Static
electricity.
Secondary
trouble
can
be
prevented
by
taking
care
during
repair.
Aa
Cover
the
parts
boxes
made
of
plastics
with
aluminum
coil.
[
A
*Ground
the
soldering
iron.
crown
i
is
(sov6onr)
-Put
a
conductive
mat
on
the
work
table.
NN
1
.
=
+
gros
s
sm
ch
\
4
[
<
*Do
not
touch
the
legs
of
IC
or
LSI
with
the
fingers
directly.
2SC33IIAQSTA = aciov I 1
2
RELAY
ORIVE
3
\
;
;
ne |
23K
a704
(732
=
mag
Sea
I
A
2
¢
RTIO
oy,
re
0
'
!
1.5K
07)
Yas
ree
a
1
I
cc
:
.
:
=
gene
2
_—4
AROUTCET
eThe
supply
part
number
is
described
alone
in
the
replacement
parts
list.
= 1
ACS.IV f t
e
&
C71
Z001
ae
a7ol
oF
Ref.
No.
Production
Part
No.
Supply
Part
No.
$|
8
221
ARRS20018
|
©
Eee
tie
4
2)
2
25C3940A
PSTA
a
EGULATOR
a
=
.
5E]
Ken
1C301
AN7470
SVIUPC1161C3
x
ee
qd
POWER
SUPPLY
CIRCUIT
FOR
(GC]
AREA.
a :
o R703 330 ow
3 ne Q
Bei |”
2
-8
oN
Q702 ee
2SCIG85RSTTA Tgitr WAaceLTA
REGULATOR
q
A
Peamestar Sal
8 AC 110/127/220 /240V
RTIS_
100
R716
150
an
°
vso7eone)
<3
AFi_T400ma
|
“Bszoi
3
18
|
(VOLTAGE
ADv.}
IK702
ac
=
E
|
AC
OUTLET
at
'
(
SWITCHED)
=
-11-
—~12-