Technics SA-203

(This schematic diagram may be modified at any
time with the development of new technology.)
13 14 15 16
DIFFERENTIAL
CIRCUIT
Hi
SCHEMATIC
DIAGRAM
Ic601,602
POWER
AMP.
CIRCUIT
12)
AN7060
é
T
DIFFERENTIAL
AMP
bs
1C603
SPEAKER
SELECTOR
(8)
3
@
SVISTK2028
CIRCUIT
a
SUP26130
°
POWER
AMP
7
Lé6s!
O701I~ 704
SVDS2V20
RECTIFIER
Ars
A
R633
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0.047 72 10
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220
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SVDMZ3I6A
ts
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S
LOUDNESS
=
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on ——= off
Om
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SVDMZL314C
SVDMZL314C3
SVDSR
1
K2
14V
ZENER
l4V
ZENER
RECTIFIER
iced
21
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=
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e701, 705 Q703 0704
2SA 1015 2SC 1815
0709
REGULATOR
[13.6] AL) v5 =
vo
ascise7 i ee
mo
pahite z;
2SK34
HOLD(PROTECTOR) SWITCHING
& REGULATOR (PROTECTOR)
Q706 Q707
2SA1123 2SD880
375A
REGULATOR
REGULATOR
9. Indicated voltage values are the standard values for the unit measured
by the DC electronic circuit tester (high-impedance) with the chassis
taken as standard,
Therefore, there may exist some errors in the voltge values, depending
on the internal impedance of the DC circuit tester.
jon,
*
Figure
in
(-_)
stand
for
DC
voltage
in
FM
signal
reception
mode.
*
Figures
in(
—_)
stand
for
DC
voltage
in
AM
signal
reception
mode.
10. ==> FM signal lines
mum AM signal lines
11, Important safety notice:
Components
identified
by
A
mark
have
special
characteristics
important
for
safety.
When
replacing
any
of
these
components,
use
only manufacturer's specified parts.
“= AF signal lines
wus Positive voltage lines
A\r634
c640
POWER SUPPLY
CIRCUIT
{t+}
tt
Positive voltage line
250V 630mA
62)
© rarer
7)
GAR721
&
A
(l2v 0.22A)
3w -” (8)
DIAL INDICATOR
et
J
coset
oo & cese¢
0.01 f
a
SPEAKERS
ary O
ee | |
L654
®
REMOTE
J
*
The
part
No.
of
transistors,
IC
and
diodes
mentioned
in
the
schematic
diagram
stand
for
production
part
No.
Regarding
the
part
No.
with
©
mark,
the
production
part
No.
are
different
from
the
replacement
part
No.
Therefore,
when
placing
an
order
for
replacement
parts,
please
use
the
part
No.
in
the
replacement
parts
list.
10K
POWER DISPLAY-RANGE SELECTOR
R802
R803 820 |
R604 E
R805 82
SVI | R2E Ol
LED DRIVER
1c 801
LEFT CHANNEL
PEAK POWER
INDICATOR
SUP25690
PEAK POWER
INDICATOR
080!-—_810
SVDAY5533K- |
SUP2I510
PEAK-POWER INDICATOR CIRCUIT