Technics SA-203 User manual

ORDER NO. SD82082280C2
ervice Manual
FM/AM
Stereo
Receiver
SA-203
[EGA]
SA-203(K)
[EGA]
* The cabinet and front panel are available in black color and silver Area
types.
*
The
black
type
model
is
provided
with
(K)
in
the
Service
Manual.
*
[EGA]
is
available
in
F.R.
Germany.
TECH N ] SCH E DATE N (Spezifikationen K6nnen infolge von Verbesserungen ohne Ankiindigung geandert werden.)
(DIN 45 500)
@ VERSTARKERTEIL
Gerauschabstand
Nennleistung (4 ©)
Phono
Aux, Tape
—26 dB Leistung (4 Q)
Phono
Aux, Tape
50 mW Leistung (4 ©)
Phono
Aux, Tape
Frequenzgang
Phono
70 dB (nach IHF, A: 78 dB)
Dauerton-Ausgangsleistung bei 20 Hz ~ 20 kHz
88 dB (nach IHF, A: 95 dB)
beide Kandle ausgesteuert 2 X 30W (4.9)
2 X 30W (8 Q)
Dauerton-Ausgangsleistung bei 40 Hz ~ 16 kHz
beide Kanile ausgesteuert 2X: 30W (4 Q)
2 X 30W (8 )
64 dB
66 dB
62 dB
Dauerton-Ausgangsleistung bei 1 kHz
62 dB
beide Kanadle ausgesteuert 2 X 35W (4 Q)
2 X 33W (8 Q)
RIAA-Standardkurve
+0,8 dB (30 Hz ~ 15 kHz)
5 Hz ~ 70 kHz2( -3 dB)
+0,2 dB (20 Hz ~ 20 kHz)
GehGrrichtige Lautstarkekorrektur (Loudness)
(bei -30 dB Ausgangsleistung)
Ausgangsspannung und -impedanz
Tape Aufnahme (TAPE REC OUT)
Gesamtklirrfaktor
Nennleistung
bei
20
Hz
~
20
kHz
0,08%
(4
Q)
0,04% (8 Q)
0,08% (4 Q)
0,04% (8 Q)
0,04% (4 9)
0,04% (8 Q)
0,025% (8 Q)
Aux, Tape
Nennleistung bei 40 Hz ~ 16 kHz
Nennleistung
bei
1
kHz
50
Hz,
+9 dB
150 mV
halbe Nennleistung bei 20 Hz ~ 20 kHz
halbe Nennleistung bei 1 kHz
—26 dB Leistung bei 1 kHz
50 mW Leistung bei 1 kHz
Intermodulationsfaktor
Nennleistung
bei
250
Hz:
8
kHz
=
4:1,
4
Q
0,08%
Nennleistung bei 60 Hz: 7 kHz = 4:1, nach SMPTE, 8 Q
0,04%
0,009% (8 1)
0,1% (4 9)
0,12% (4 Q)
Leistungsbandbreite
beide Kandle ausgesteuert bei —3 dB
10 Hz ~ 30 kHz (4 )
Dampfungsfaktor 15 (4.Q), 30 (8.Q)
Eingangsempfindlichkeit und -impedanz
Phono 2,5 mV/47 kQ
Aux
150
mV/22
kQ
Tape 180 mV/22 kQ
Maximale TA-Eingangsspannung (1 kHz, eff.) 130 mV
Klangregler
Bafregler (BASS)
Hdhenregler (TREBLE)
‘Technics
50 Hz, +10 dB ~ —10 dB
20 kHz, +10 dB ~ -10 dB
+1 dB
55 dB
260 mV/330 Q
Kanalabweichung (Aux, 250 Hz ~ 6300 Hz)
Obersprechdaémpfung (Aux, 1 kHz)
KopfhGrerpegel und -impedanz
Lautsprecherimpedanz
MAIN oder REMOTE
MAIN und REMOTE
4Q~169
8Q~ 169
@ UKW-TUNERTEIL
Wellenbereich
87,5
~
108
MHz
Eingangsempfindlichkeit
S/R 30 dB
S/R 26 dB
S/R 20 dB
Nutzempfindlichkeit nach IHF
Gesamtklirrfaktor
Mono : : 0,15%
Stereo
0,2%
1,3 pV (75.9)
1,2 pV (75 Q)
0,9 pV (75 Q)
1,5 pV (nach IHF ’58)
Matsushita Electric Trading Co., Ltd.
P.O. Box 288, Central Osaka Japan

Gerduschabstand
@
MW-TUNERTEIL
Mono 60 dB (75 dB nach IHF)
chads
58
dB
(70
dB
nach
IHF)
Welllenbereiche
525
~
1605
kHz
Frequenzgang
20
Hz
~
15
kHz(+1dB~-2dB)
—_
Bingangsempfindlichkeit
(S/R
20
dB)
30
pV,
300
yV/m
Trennscharfe
bei
Stérsender
75
dB
Trennscharfe
30
dB
Einfangverhaltnis
1,2
dB
Spiegelfrequenz-Dampfung
bei
1000
kHz
50
dB
Spiegelfrequenz-Dampfung
bei
98
MHz
55
dB
ZF-Dampfung
bei
1000
kHz
40
dB
ZF-Dampfung
bei
98
MHz
75
dB
Ansprechdampfung auf Nebenfrequenzen bei 98 MHz 80 dB
MW-Unterdriickung 50 dB
Obersprechdémpfung
1
kHz
40
dB
10 kHz 30 dB
19 kHz ~30 dB (-35 dB nach IHF) Netzspannung
38 kHz —50 dB (—50 dB nach IHF) Wechselstrom 50 Hz/60 Hz, 220V
Kanalabweichung
(250
Hz
~
6300
Hz)
+1,5
dB
Abmessungen
(BXHXT)
430
X
86
X
320
mm
@ ALLGEMEINE DATEN
Leistungsaufnahme 300 W
Tragerrest
Begrenzereinsatz
1,2
uV
Gewicht
6,6
kg
Bandbreite
ZF-Verstarker 180 kHz
UKW-Demodulator 1000 kHz
AntennenanschluB 75 Q (unsymmetrisch)
Hi CONTENTS
Page Page
LOCATION OF CONTROLS ....... 00. ewe nt eens 2,3 CIRCUIT BOARD AND WIRING CONNECTION
TECHNICAL GUIDE ........ 2.2 ce ec eee eee 4 DIAGRAM ..... 2.0.2 ee ee eee et we we 13 ~16
DISASSEMBLY INSTRUCTIONS ............85% 5~7 SCHEMATIC DIAGRAM...........20 000 ee ae 17 ~21
MESSUNGEN UND JUSTIERUNGEN ........005 8~10 REPLACEMENT PARTS LIST (Electrical Parts)...... 22 ~24
DIAL CORD INSTALLATION GUIDE .........00065 10 EXPLODED VIEW ...... 0-2 ee een eee en ena 24, 25
BLOCK DIAGRAM ..... 2... 0c cee erent ees 11,12 REPLACEMENT PARTS LIST (Cabinet and Chassis Parts) . . 26
Mi LOCATION OF CONTROLS
Peak-power indicators Tuning indicator {W/pointer)
Power display-range selector
Tape-monitor selector ( J source, = tape)
(off «>» x1 +» x0.01)
FM stereo indicator
Power Signal-strength indicators
Headphones jack FM
phono | AM
Speaker men) aux
selectors (remote)
Input selector
Tuning
Volume control
FM muting/FM mode selector ( Hl on/FM auto, = off/FM mono)
Loudness ( M off, = on)

(Ground)
AM antenna terminal
AM ferrite-bar antenna coil Main speaker terminals
FM antenna
terminal
(75Q. coaxial)
Ground
Phono input
Aux input
(rec out)
el
(playback)
Remote speaker terminals
* Phono input capacitance is about 150pF.
FM IF amp. & FM detector circuit
FM MPX circuit
Tuning gang
Power amp. circuit
Power transformer
circuit
Power supply
circuit
Equalizer circuit
Differential amp.
circuit

_SA-203 |
M@ TECHNICAL GUIDE
The power amplifier !C (SV!STK2028) is provided with a protection circuit.
1. Muting (shock noise prevention) with power switch ON.
(1) When power is supplied, negative voltage is applied to the emitter of switching transistor (Q703).
(2) Positive voltage flows from the regulator (Q707) to R709 and R708 to turn D705 and Q703 ON. (It takes a few
seconds until 0703 turns ON due to time constant of C706).
(3) When Q703 turns ON, negative voltage is applied to the pin ©) of input amplifier 1C (AN7O60) causing the input
amplifier to operate.
* The signal is applied to the power amplifier a few seconds later so that shock noise can be prevented.
2. Muting (shock noise prevention) with power switch OF F.
(1) When power supply is cut off, the voltage applied to Q703 drops at the base faster than the negative voltage at the
emitter connected to the large capacity condenser, thus turning off D705 and Q703.
(2) Input amplifier is off with 708 off.
* The signal is cut off on the input side while the operation voltage of power amplifier still remains, thus preventing
shock noise.
3. Operation of the protection circuit with speaker terminal short-circuited.
(1) Transistor Q7 in the power amplifier |C (SViISTK2028) is usually OFF, but when the speaker terminal is short-circuit-
ed to the ground, a large amount of current flows to Q6, causing a voltage to be generated at R5.
(2) The voltage causes Q7 to turn ON, then (Ii) flows to raise the base potential of 702. And Q702 turns ON.
(3) As Q702 is ON, ® flows to generate a voltage at R707, and then 0701 turns ON.
(4) G) flows with Q701 turned ON, ® flows to hold Q702 ON.
(5) The current flowing in R709 increases due to ), and the positive voltage from regulator (0707) drops, causing D705
to turn off.
(6) tn other words, Q703 turns OFF and the negative power supply to the input amplifier is discontinued.
* This condition continues until power supply switch is set OFF.
A few minutes after the power switch is set to ON, if no sound is produced while the operation is normal, cut off the
power supply and check the speaker connections and the input equipment.
(C601 ©. {C603 (SVISTK2028) Power Amp.
1C601, 602
AN7060
Differential Amp.
1C602
Ck a eS. ZO: (} oe Se oe oS ee eee Ive ee Nel | ERE
From regulator (0707) Ov

Mi DISASSEMBLY INSTRUCTIONS
1.
— @
ao BW DN
How to remove the cabinet
Remove
the
5
setscrews
(Fig.
1:
@~
@)
of
the
cabinet.
. Remove the cabinet.
How to remove the front panel
. Remove the cabinet. (Refer to the section “How to
remove the cabinet.” }
. Remove the 4 setscrews (Fig. 1: @, @ and Fig. 2:
@, ©) of the front panel.
.
Remove
the
1
setscrew
(Fig.
1:
@)
of
the
transparent
plate bracket, then remove the front panel.
How to remove the dial scale
. Remove the cabinet. (Refer to the section ‘‘How to
remove the cabinet.’’)
. Remove the front panel. (Refer to the section ‘“How
to remove the front panel.’’)
. Pull up the two claws at the bottom of the
transparent plate in the direction of the arrow 8]
(Fig. 3).
. Remove the dial indicator lamp and the 2 dial scale
holder of the front chassis. (see Fig. 4)
. Remove the dial scale.
How
to
remove
the
peak-power
indicators
printed
circuit
board
. Remove the cabinet. (Refer to the section ‘How to
remove the cabinet.)
. Remove the front panel. (Refer to the section “How
to remove the front panel.’’)
.
Remove
the
power
display/range
knob
(Fig.
3).
.
Remove
the
2
setscrews
(Fig.3:
@,
@)
of
the
front chassis.
. Remove the 2 lugs (Fig. 4: @, @) to detach the
peak-power indicators printed circuit board.
Front_
Cabinet . 2]
a)
panel
[Fig. 1]
Front panel
[Fig. 2]

Dial scale P))
holder |
Dial scale
holder
(Rubber)
NI
Dial scale
Pare SS SX
Peak-power indicators SK SS
printed circuit board
[Fig. 4]
Power amplifier IC Rear panel
Front panel
[Fig. 7]
jterminal
late
(rare et
AM antenna coil Rear panel Speaker terminal case
c—
fae | a
3 0000/0l0004
Input terminals Antenna terminals Speaker terminals AC cord
Oo ©
O©D0®
2@
Go
[Fig. 5]
AM
antenna
coil
Rear
panel
=
|
Sodd
©
[6060
:
@
20
s2/0lop0Fle
ooo
|
Input terminals Antenna terminals Speaker terminals AC cord
[Fig. 6]
e How to remove the power amplifier IC
1. Remove the cabinet. (Refer to the section “How to
remove the cabinet.’’}
2. Remove the 6 setscrews (Fig. 2:@,@and ®@~ @)
and 3 setscrews (Fig. 5: @ ~ @ ) of the speaker
terminal case.
3. Remove the speaker terminal case.
4. Remove the 2 setscrews (Fig. 6: @ , @ ) of the
heat-sink.
5. Remove the 3 setscrews (Fig. 7: @ ~ ®).
6. Pressing the claws of the input termina! plate and
antenna terminal plate in the direction of arrow@
(Fig. 7), lift up the front panel in the direction of
arrow @ (Fig. 8). Then, the front panel can be
removed from the rear panel.
7. Remove the 2 setscrews (Fig.9: @ ,@ ) of the
heat-sink,.
8. Unsolder the power amplifier !C. (Fig. 9).
9. Remove the 2 setscrews (Fig. 10: @ , @ ) used to
secure the power amplifier IC on the heat-sink, and
then pull the power amplifier IC.
10. When mounting the power amplifier IC, apply silicone
compotnd (or equivalent heat diffuser) to the back of
power amplifier IC.

Note 1:
Note 2:
[Fig. 8]
Heat-sink
Bottom view
[Fig. 9]
When
checking
or
repairing,
remove
the
speaker
from
the
speaker
terminal.
If
it
is
necessary
to
check
or
repair
without
removing
the
speaker
from
the
terminal,
short-circuit
the
phono
input
terminal
beforehand.
Setscrew
@
(Fig.
6)
is
screw
with
detents
(Part
No.:
XTBS3+8BFZ)
as
shown
in
Fig.
11-A
in
order
to
make
the
contact
of
electric
circuit
perfect.
Take
care
not
to
mix
up
these
screws
with
other
screws.
When
substituting,
use
a
3
x
8mm
tapping
screw
(Part
No.:
XTB3+8BFZ)
and
toothed
lock
washer
(Part
No.:
XWC3B)
as
shown
in
Fig.
11-B.
The
teeth
of
the
lock
washer
should
be
positioned
on
the
chassis
side.
Rear panel
Heat-sink
Power amplifier IC
[Fig. 10]
Detent
XTBS3+8BFZ1
Detent
Ot pip )--*783+88F2
VA AVY 3
Detent
[Fig. 11]

Mi MESSUNGEN UND JUSTIERUNGEN
Pull out
AM ANT
FM MPX
FM DET
Trimmer
FM Discri
{FT
©@RGRE 5 ofr set
FS
AM ANT
Trimmer
©
(L302L301)
(L303)
fl FM ANT
I Trimmer
] a
CTI
AM OSC
Trimmer
FM OSC
Trimmer
FM Muting
Level Adj.
AM IFT FM IFT
(2nd)
GS SS css q
Input —» -> Output
' 37.560 ;
From FM-SG 7 750 | To antenna
(759) ! ! terminal(759)
DC VOLTMETER Ceres es =
[Fig. 12]
(Abb. 12)
wale 7 Noise
A
COIL
[100pH)
Se
(SLOX101—20)
F
zs,
§
@
©
@® ©
‘ VR301
e101) Te1Oe Noise A—B,D-—€E: Stereo OFF Position.
B-D: Stereo ON Position
(indicator lighting).
AF output wave form Cc: Adjust Point of Pilot Cireutt,
(Fig. 13] [Fig. 14] [Fig. 15]
(Abb. 13) (Abb. 14) (Abb. 15)

SA-203
ANSCHLUSS FREQUENZ
-SA-203
ANZEIGE-
FREQUENZ
DURCH VOR-
EINSTELLUNG
ABGLEICH AUF MIN. VERZERRUNG IN STELLUNG UKW-MONO
Ein Gleichstromréren- 7
voltmeter zwischen
und
uber eine Drosselspule
verbinden.
(Siehe Abb. 13)
e Stellungen und zu benutzende Gerate
. Elektronische Voltmeter fiir Wechsel-und Gleichstrom (VTVM)
. AM (MW)-Mefsender (AM-SG)
. Netzspannung auf ihren Sollwerthalten.
. Der Ausgang des Me&senders darf nicht hdher sein als unbedingt
notwendig fur eine gute Ablesung.
5. Die AM-Ferritstabantenne (L201) herausziehen.
AM (AM abgleich)
FM (FM abgleich)
. Einen nichtmetallischen Schraubenzieher fir die Einstellungen
verwenden.
. Wellenbereichsschalter
VORBEREITUNG ABGLEICHSPUNKTE ABGLEICHSVERFAHREN
6. Bereichsschalter
. Den Kern von T101 so
justieren, daf§ die gemessene
Spannung im signallosen
Modus OmV im 300mV
Bereich betragt.
ANZEIGE-
FM/AM (MW)-MESSENDER EREQUENZ
DURCH VOR-
FREQUENZ [eiNSTELLUNG
AM (MW)-ZF-ABGLEICH
MefRsender uber eine
Kunstantenne an den
UKW-Antennen-
eingang schlieRen.
(60dB in den
Antenneneingang
leiten.)
T101
VORBEREITUNG
(Diskriminator FT)
ABGLEICHSPUNKTE ABGLEICHSVERFAHREN
100MHz
(400Hz
Modulat.,
100%)
ANSCHLUSS
100MHz
. 7101 Kern fiir minimale
Verzerrung der rechten und
linken Kandle justieren.
Klirrfaktor-MeRbriicke
an Ausgangsklemme
(OUTPUT) schlieRen.
UKW-STEREO-DEKODER-ABGLEICH
UNTER VERWENDUNG EINES ZAHLERS ALTERNATIV-ME& METHODE
. Unmoduliertes Mono-Signal 100MHz in das Gerat speisen.
. FM muting/mode-Schalter auf ‘‘on/auto” stellen.
. Zahler uber einen Widerstand 100K ohm an schlieRen.
. VWR301 auf 19kHz+30Hz einstellen.
T7101
Einen MW-Signal
(Diskriminator FT)
generator Uber einen
200pF Kondensator
mit dem MW-Antennen-
eingang verbinden.
Die gemeinsame
Leitung mit dem
Chassis verbinden.
(Starker Eingang)
450kHz
(400Hz
Modulat.,
30%)
Oszilloskop oder Wech-
selstrom-Voltmeter
uber den Lautsprecher
schlieen.
Die Eingangsfrequenz und die
Einstellungspunkte so adustie-
ren, daf& der Ausgang den
maximalen Wert erreicht.
T201 (1. \FT)
T202 (2. IFT)
Kein
Empfang
. Stereosignal entweder von einem Stereogenerator.
oder einem Sender einspeisen.
. VR301 so einstellen, bis die Stereolampe auf leuchtet.
AM (MW)-HF-ABGLEICH Schleifer von VR301 sichern, wie in Abb. 15 gezeigt.
Einen MW-Signal-
generator Uber einen
200pF Kondensator
mit dem MW-Antennen-
eingang verbinden.
Die gemeinsame
600kHz
(400Hz
Modulat.,
30%)
1500kHz
(400Hz
600kHz
Oszilloskop oder Wech-
selstrom-Voltmeter
uber den Lautsprecher
schlieRen.
Oszilloskop oder Wech-
selstrom-Voltmeter
L201
(MW Ant. Spule)
L202
(MW Osc. Spule)
CT201
(MW Ant. Trimmer)
Ne
Auf max. Ausgang abgleichen|
2. Den Ferritkern von L201
mit einem Schraubendreher
justieren,
. Auf max. Ausgang abgleichen,
MeRsender Uber eine
Kunstantenne an den
UKW-Antenneneingang
schlieRen.
(16dB inden Antennen-
100MHz
(400Hz
100%)
Modulat., 1OOMHz
Oszilloskop oder Wech-
selstrom-Voltmeter
Uber den Lautsprecher
schlieen.
UKW-STUMMABSTIMMUNGS PEGELANZEIGER
VR101
(UKW-Muting)
. “Muting’’ Schalter auf ‘‘on"
stellen. VR101 so einstellen,
da der Ausgang unter
Bewirken der Dampfung
gegeben wird.
Leitung
mit
dem
eingang
leiten.)
Chassis
verbinden.
(Schwacher Eingang)
1500kHz . Die schritte (2) und (3)
Modulat., :
wiederholen.
30%)
CT202
(MW Osc. Trimmer)
uber den Lautsprecher
schlieRen,
e
Verwendete
Einrichtungen
e
Vorbereitung
AM
UKW-Messender
(FM-SG)
.
UKW-MeRsender
(FM-SG)
1.
Stereo-Modulator
an
FM-SG
anschlieRen.
.
Stereo-Modulator
(oder
Trennmesser)
2.
SG-Ausgang
Uber
75-Ohm
UKW
Kunstantenne
an
den
:
Verzerrungsmesser
Antenneneingang
des
Gerates
schlieRen.
.
Oszilloskop
3.
Der
normale
Eingang
des
Gerates
betrat
60dB
(1mV),
400Hz
.
Elektronische
Voltmeter
fur
Wechsel-
und
Gleichstrom
(VTVM)
100%
Modulation.
(Wegen
Verwendung
der
Kunstantenne
mu
.
Signalfrequenzmesser
(mefber
fiir
19kHz
und
108MHz)
der
Signalausgang
12dB
plus
(IHF)
sein:
d.h.
beim
Eingang
von
.
UKW75-Ohm
Kunstantenne
(Abb.
12)
60dB
soll
der
Signalausgang
72dB
sein.)
UKW-ZF-ABGLEICH
@ DIAL CORD INSTALLATION GUIDE
* For threading a fresh cord, proceed as follows.
1. Prepare a fresh cord more than 180cm (70-15/16")
in length.
. Bring the variable capacitor into a state where the
drum is completely turned to the right (maximum
capacity and lowest frequency for the variable
Ein Gleichstromroren-
voltmeter zwischen
und
uber eine Drosselspule
verbinden
(Siehe Abb. 13)
Den Kern von T101 so justieren, 2
da die gemessene Spannung im
signallosen Modus OV im
300mvV Bereich betragt.
T101
100.0MHz
(Diskriminator
FT)
Kein Signal
capacitor.)
pane
MA
Each
3.
Direct
the
cord
in
the
order
from
1
to
7.
.
Ejinen
schwachen
Eingang
:
: é
87.35MHz
87.35MHz
geben,
bel
denn
Garsusch
in
4.
Stretch
the
cord
in
such
a
tension
as
the
spring
length
(400Hz (Anzeige- EA Ose Soule) der Ausgangswellenform is elongated by 1.5 times that of the original state.
Oe
conan
eae
hee
“
el
id
5.
Fix the
knot
of
the
cord
with
the
adhesive.
eine Kunstantenna 100%)
an den UKW-
Antenneneingang
schliefen.
108.25MHz
(400Hz
Modulat.,
100%)
min.)
108.25MHz
(Anzeige-
Frequenz
max.)
Oszilloskop Uber den
Lautsprecher schlieRen.
CT3 (Osc. Trimmer)
UKW-FREQUENZ-ABGLEICH
9O0MHz
(400Hz
Modulat.,
100%)
MefSsender Uber
eine Kunstantenna
an den UKW-
Antenneneingang
schlief&en.
106MHz
(400Hz
Modulat.,
100%)
MefRsender Uber eine
Kunstantenne an den
UKW-Antennenein-
gang schlieRen.
9O0MHz
(400Hz
Modulat.,
100%)
106MHz
Oszilloskop Uber den
Lautsprecher schlieRen.
Oszilloskop Uber den
Lautsprecher schlieRen.
L2 (HF Det. Spule)
L1 (Ant. Spule)
CT2
(HF Det. Trimmer)
CT1
(Ant. Trimmer)
T190 (FM FT)
. So einstellen, daf& die Aus-
gangswellenform vertical
symmetrisch wird. (Abb. 14)
. Die Einstellung von (5) und
(6) wider holen, bis die
Frequenz mit der Skala
ubereinstimmt.
. Einen schwachen Eingang
geben, bei dem Gerdusch in
der Ausgangswellenform
enthalten wird.
. So einstellen, da die Aus-
gangswellenform vertical
symmetrisch wird. (Abb. 14)
. Die Einstellung von (7) und
(8) wieder holen, bis die
Frequenz mit der Skale
Ubereinstimmt.
. Auf max. Ausgang
abgleichen.

M@ BLOCK DIAGRAM
IC3Ol
1C201 IC101
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switch
in
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auto”
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6.
S6:
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speaker
selector
switch
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“off”
position.
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there
may
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errors
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voltge
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identified
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off/FM
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important
for
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replacing
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of
these
components,
use
witch
in
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position.
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display
range
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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
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stand
for
DC
voltage
in
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signal
reception
mode.
*
Figures
in(
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stand
for
DC
voltage
in
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signal
reception
mode.
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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.
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diagram
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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
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LEFT CHANNEL
PEAK POWER
INDICATOR
SUP25690
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INDICATOR
080!-—_810
SVDAY5533K- |
SUP2I510
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SA-203 SA-203
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REPLACEMENT
PARTS
LIST
(Electrical
Parts)
M@
EXPLODED
Notes: 1. Part numbers are indicated on most mechanical parts. Please use this part number for parts orders.
2. 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.
3. Bracketed indications in Ref. No. columns specify the area. Parts without these indications can be
used for all areas.
4. The ’S” mark is service standard parts and may differ from production parts.
5. Unless otherwise specified.
All resistors are in OHMS (Q) K = 10002, M= 1000kQ
All capacitors are in MICROFARADS (uF) P = pak
Numbering System of Resistor Numbering System of Capacitor
Capacitor Type
Tolerance
Example
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Ref.
No.
Part
No.
Description
Ref.
No.
Part
No.
Description
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SL14C109
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SLI2C129R
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IFT
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AN6876
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SLI2C413R
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P
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IC401
1C601, 602
IC603
1C801, 802
SVINJ4559DDM
AN7060F
SVISTK2028B
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Decoder (MPX)
Equalizer
Amplifier
Differential
Amplifier
Power Amplifier
L.E.D. Driver
COMPONENT COMBINATIONS
2701, 702
SXRFS203ZSM
0.01 #F (X2)
i
TRANSISTORS
2SK359—D
2SC1674—M
2SC 1675—L
25C945-—Q
2SA733—P1
2SC945—Q
2$C1318—-Q
2SA 733—P1
2SC945—Q
2SA722—S
2SC2320L—F
2SA992
2SA1015—Y
2SC828AQ
2SC1815—Y
2SC 1567—Q
2SA1015—Y
2SA1123—R
2SD880—Y
2SK34—D1
FM. RF
Amplifier
FM. Mixer
FM Local
Oscillator
DC Amplifier
DC Amplifier
Switching
Switching
Muting Control!
Muting
Switching
Differential
Amplifier
Pre Drive
Hold
Hold
Switching
Regulator
Regulator
Regulator
Regulator
Hold
MA162A
2—OA99
SVDAY2434D
SVDPR5532K
MA162A
SVDS2V20
SVDMZ316A
SVDNZ306C
SVDMZL314C
SVDSR1K2
SVDMZL314C3
SVDAY5533K-1
Switching
AM Detector
L.E.D. Signal
Strength
(Yellow)
L.E.D. Stereo
Indicator (Red)
Detector
Rectifier
16V, Zener
6V, Zener
14V, Zener
Rectifier
14V. Zener
Peak Power
Indicator
L101
L201
L202
L259
L299
L301, 302
L303
L601, 602
L651 ~ 654
L750. 751
SLA4N15
SLD4P77—P
ELQ5A77
SLO4P107—P
ELQS181KB
SLQX101—3M
SLF2C39
$LO2C1—P
SLQZ10G1—D
RLQY15G5—Y
SLM1C63—M
SLM1C71—P
SLQY15G—30
SLQY15G—10
SLQX400—D
FM Antenna
FM Detector
Choke
FM Oscillator
Choke
FM Discri
AM Antenna
AM Oscillator
Choke
Choke
Choke
Choke
Choke
Choke
Choke
CERAMIC FILTERS
SVFT107MS2—A
SVFT107MS2—B
SVFT107MS2—C
SVFT107MS2—D
SVFT107MS2—E
SVFE107MA8~—A
SVFE107MA8—B
SVFE107MA8—C
SVFE107MA8—D
SVFE107MA8—E
10,7MHz, (Red)
10,675MHz,
(Blue)
10,725MHz,
{Orange}
10,650MHz,
({Btack)
10,750MHz,
(White)
10,7MHz. (Red)
(Orange)
10,66MHz,
(Brown)
10,74MHz,
(Gray)
(Use pair ranks as same as CF102 and CF 190)
SVFSFU4508
AM, 450k Hz
XBA2C10TRO
XBA2CO6TRO
250V, TIA
250V. T630mA
XAMR86S300A
XAMR86S300
XAMR78S 250A
Dial, 12V,0.06A
(Green)
Dial, 12V,0.06A
(Orange)
Dial Indicator,
12V, 0.22A
SWITCHES
S$1-1~1-3
$2-1~2-2,
4
$3
$5, 6
$7
S8
A
SSR165
SSH2015
SSH165
$SH2017
ESB90619S
SSS53
Function
FM Muting,
Loudness and
Speaker Selector,
Tape Monitor
Speaker Selector
Power Source
Range Selector
VARIABLE RESISTORS
VR101
VR301
VR501
VR502
VR601
VR602
s
EVNM4AA00B54
EVTS3MA00B53
EWJGFA066B15
EWHHMA531G15
EWJFCOO66C15
EWJFCY066530
Muting Level
Adjustment,
50k0 (B)
PLL Voltage
Adjustment,
5kQ (B)
Volume Control,
100k 2 (B)
Balance Control,
100k (G)
Treble Control,
100k (C)
Bass Control
VARIABLE CAPACITOR
CV1, 2, 3.
201, 202
(CT1. 2. 3,
201, 202)
ECV5MD34X71G
Tuning Gang.
FM & AM
(with Trimmer)
Ref. No.
Part No.
Part No.
Ref.
No. Part No.
RESISTORS
ANHADHRNAAUAURURHnH
NANNNHDARHHANNH
AANDNHRHNHAHRHHnH
Ref. No.
ERD25TJ104
ERD25FJ471
ERD25FJ221
ERD25T J684
ERD25TJ473
ERD25FJ103
ERD25FJ102
ERD25FJ391
ERD25FJ331
ERD25FJ272
ERD25TJ104
ERD25FJ821
ERD25FJ471
ERD25TJ823
ERD25TJ683
ERD25FJ471
ERD25FJ103
ERD25FJ103
ERD25FJ682
ERD25T J183
ERD25TJ183
ERD25FJ471
ERD25TJ273
ERD25FJ103
ERD25FJ821
ERD25FJ471
ERD25FJ562
ERD25FJ103
ERD25FJ822
ERD25TJ333
Part No.
ARAANAHDARHHHNAHHWHAHHARDHNANHNHAHHH
Ref. No.
ERD25FJ222
ERD25FJ222
ERD25FJ682
ERD25TJ274
ERD25TJ104
ERD25FJ103
ERD25FJ682
ERD25FJ560
ERD25TJ105
ERD25FJ102
ERD25FJ101
ERD25FJ822
ERD25FJ103
ERD26TJ274
ERD25T J223
ERD25FJ152
ERD25FJ331
ERD25FJ822
ERD25FJ472
ERD25FJ100
ERD25TJ333
ERD25TJ223
ERD25TJ154
ERD25TJ473
ERD25TJ153
ERD25FJ122
ERD25FJ332
ERD25TJ333
ERD25TJ104
ERD25FJ472
ERD26TJ104
ERD25TJ223
ERD25FJ101
Part No.
HAKDANANUNAHNANH ANAKHNAHRNHnNH
NHNHNHNANAN
nn
ERD25TJ104
ERD25TJ823
ERD25FJ822
ERD25FJ822
ERD25FJ391
ERD25FJ822
ERD25FJ271
ERD25TJ184
ERD25TJ123
ERD25FJ680
ERD25TJ223
ERD25FJ221
ERD25FJ391
ERD25FJ472
ERD25FJ472
ERD25FJ331
ERD25TJ104
ERD25FJ102
ERD25TJ393
ERD25TJ333
ERD25FJ102
ERD25TJ104
ERD25TJ393
ERD25TJ393
ERD25FJ392
ERD25FJ102
ERD25FJ392
ERD25TJ223
ERD25TJ123
ERD25FJ681
ERD25FJ182
Part No.
R623,
R625,
R627,
R629,
R631,
R633,
R635,
R701
R702,
R704
R705
R706
R707
R708
R709
R711
R713,
R715
R716
R717
R718
R719
R721
R801.
R803,
R805,
R807,
R809,
R811,
Ref.
624 S$
626 AS
628 S
630 $
632A S$
634A S
636 S$
AS
703 AS
>
NANRANNAHRUNAnH
aan
BRD
HANNAN
n
| ERD25FJ561
ERD25FJ470
ERD25FJ272
ERD25FJ272
ERDS50FJ100
ERDS0FJ100
ERG1ANJ331
ERD25FJ470
ERD25FJ270
ERD25FJ103
ERD25T J823
ERD25FJ562
ERD25FJ821
ERD25TJ183
ERD25TJ153
ERDSOFJ332
ERD25FJ472
ERD25TJ123
ERD25FJ5152
ERD25TJ123
ERD25FJ101
ERD25FAJ2R2
ERG3ANJ470
ERD25FJ103
ERD25FJ821
ERD25FJ820
ERD25FJ102
ERD25FJ103
ERD25FJ472
Part No.
CAPACITORS
C1
ANHNNHHRHDHHaH
s
s
Ss
s
Ss
Ss
Ss
s
s
Ss
ANAANDAN
ECCD1H220KC
ECCD1H 100K
ECKD1H102ZF
ECCD1H150KC
ECCD1H1R5CC
ECCD1H181K
ECCD1H 220K
ECCD1H390KC
ECCD1H100KC
ECKD1H102ZF
ECKD1H103ZF
ECCD1H180KC
ECKD1H103ZF
ECKD1H103ZF
ECEA50Z4R7
ECQ@M1H473J5Z
ECEA50Z4R7
ECCD1H101K
ECEA50Z1
ECCD1HO50CC
ECKD1H103ZF
ECKD1H103ZF
ECKD1H223ZF
ECEA1CS330
ECKD1H103ZF
ECEA1CS100
€201
C202
C203.
C205
an
C206
C207
C208.
C210
C211
C212
C213
C214
C215
C217
ANNANHAHRHANANH
C218
C220
C301
C302
C303
C304
C305.
C307
C308
C309
PYPDARNNHANAHNANUYH
C310
C311,312 §
C313, 314_ S$
ECCD1H100KC
EC@P1361JZ
ECKD1H103ZF
ECEA1ES470
ECEA1ES470
ECEA1 CS330
ECKD1H103ZF
ECQM1H333J5Z
ECEA1HS100
ECKD1H1032ZF
ECEA1CS330
ECEA50Z4R7
ECQM1H473JZ
ECEA1CS100
ECCD1H220K
ECEA50Z1
ECEA50Z 4R7
ECEA50Z 2R2
ECQM1H473JZ
ECEA1ES101
ECKD1H271KB
ECKD1H103ZF
ECEA50Z1
ECEA50Z R47
ECQP1471 JZ
ECEA50ZR47
ECQM1H153J5Z
O> AAHNHH
ANANNNNNALD w
NAANNNAHANNAN
ECKD1H103ZF
ECEA5OM3R3R
ECCD1H101K
ECCD1 H680K
£CKD1H103MD
ECEA1CN330S
ECQM1H223J5Z
ECQM1H682JZ
ECEA1HNO10S
ECEA1ES101
ECKD1H103ZF
ECKD1H331KB
ECQM1H563JZ
ECEASOM3R3R
ECCD1H390KC
ECCD1H820KC
ECEA1HS100
ECQM1H272JZ
ECQM1H223JZ
ECQM1H183JZ
ECQM1H104JZ
ECEA1HS100
ECCD1 HO20CC
ECCD1H390KC
ECKD1H821KB
ECCD1H330KC
ECKD1H471KB
C631,
C633,
C635,
C637
C639,
C641,
C651,
C653,
C655,
C667,
C701,
C703
C704
C705
C706
C708,
c710
C711
C712
C713
C801.
C803.
C805
C807,
C1001
C1002.
HANHNDYNYN HS
DAAAADANANHNAHnN
802
804
808
Pp aan
ECCD1H101K
ECEAS0Z3R3
ECEA1EN3R3S
ECCD1H101K
ECQM1H473JZ
ECQM1H473JZ
ECKD1H103ZF
ECKD1H103ZF
ECKD1H103ZF
ECKD1H1032ZF
ECETS45V682U
ECEA1HS101
ECEA1HS100
ECEA50Z3R3
ECEA1ES331
ECEA1VS330
ECKD1H103ZF
ECEA1VS102
ECKD1H103ZF
ECEA1ES470
ECEA50Z4R7
ECEAS0Z4R7
ECEA1ES101
ECEA1AS470
ECKDKC103PF
ECQE1104KN

-203 | | | SA-203 SA-203
M™ EXPLODED VIEW M@ REPLACEMEN
Notes: 1. Part numbers ard
Please use this p
2. Important safet
Components ide
characteristics i
When replacing
manufacturer's q
3. BEM -markedp
O-marked part
Tolerance
sib e ftommner |
: + 0.25pF
ee ey ae ee
: +80%, —20%
> +100%, -0%
CABINET
1 O | SYW405 Panel, Frd
1 KE syw405—10
We)x2 ( T—
49) ER +
ZS Pointer lamp
NN
2 SBC301 —5
3 SBC369—2
SBN1019
SBN1049
SBN1051
SBD35
SBD35—1
SGU215—1
SKD4090—4
SKD4090—5
SGX7047—1
SUF305
SUF305 — 2
SHD3X27
13 S$ | RDR8—1 Pulley, Di
14 SHR9557 Holder,
15 SMXA65 Cover, Li
16 SHG1589
17 SHE113
18 SHR301
19 SHG1587
20 SDPS083 Pointer,
21 SHP53—3 Slider, Po
22 XCJ6P21B—A1 | Jack, He}
23 SHS1045 Fiber, Po
SKL245
SKC751S1
SKC751B1
SHS1009
27 SUT 347 Clip, Fus
28 SUS 233 i
SJA88
SHR127
SGX7045—1

SA-203 SA-203
Mi
REPLACEMENT
PARTS
LIST
(Cabinet
and
Chassis
Parts)
Notes: 1. Part numbers are indicated on most mechanical parts. 4. Parts other than Ml - and O-marked are used for both black
Please use this part number for parts orders. and silver types.
2. important safety notice: 5. Bracketed indications in Ref. No. columns specify the area.
Components identified by A mark have special Parts without these indications can be used for all areas. '
characteristics important for safety. 6. The ’S” mark is service standard parts and may differ from
When replacing any of these components, use only production parts. '
manufacturer's specified parts. 7. The parenthesized numbers in the column of description
3.
MEM
-marked
parts
are
used
for
black
only,
while
stand
for
the
quantity
pre
set.
@
ator lamp
Power transformer
(e)x2
© -marked parts are for silver type only.
Ref. No. Part No.
Description & Pcs
Part No.
Black type model No. : SA-203 (K) |
Description & Pcs
Ref. No. Part No.
Description & Pcs
CABINET
and CHASSIS PARTS
1
1
O] sywa0s
ME sywa05—10
SBC301 —5
SBC369—2
SBN1019
SBN1049
SBN1051
© | SBD35
ac SBD35—1
SGU215—-1
O | SKD4090--4
SKD4090—5
SGX7047—1
SUF305
SUF305—2
SHD3X27
RDR8--1
SHR9657
SMXA65
SH G1589
SHE113
SHR301
SHG1587
SDP5083
SHP53—3
XCJ6P21B—A1
SHS1045
SKL245
SKC751S1
| SKC751B1
SHS1009
SJT 347
SUS233
SJA88
SHR127
SGX7045—1
Panel, Front (Silver) (1)
Panel, Front (Black) (1)
Knob, Power (1)
Knob, Speaker Selector .
Loudness Muting,
Tape
Knob, Bass, Treble,
Balance & Selector
Knob, Volume
Knob, Tuning
Knob, Range (Silver)
Knob, Range (Black)
Panel, Transparent
Scale, Dial
(Silver Type)
Scale, Dial
(Black Type)
Plate, Dial
Panel, Front Plate
(Silver Type)
Panel, Front Plate
(Black Type)
Shaft, Dial Pulley
Pulley, Dia!
Holder, Dial Scale
Cover, Line Capacitor
Rubber, Dial Holder
Clamper, P.C.B
Clamper, Pointer
Rubber, Pointer
Pointer, Dial
Slider, Pointer
Jack, Headphones
Fiber, Power Switch
Foot, Set
Cabinet (Silver)
Cabinet (Black)
Fiber, Cabinet
Clip, Fuse
Spring
AC Cord, Power
Source
Bushing, AC Cord
Plate, L.E.D
(Silver Type)
SGX 7045 ~—2
SJF4813—1
SJF8033—4N
SJS5327
SDT 8081
$US175
SHD3X1F—1
SDD38—1
S$DSA4121
S$DZ051 —2
SUW1769
SGPA203EGA
SUW1829
SMC1015
SMX681
SMC1033
SMC1019
SMX461
SUW1813
RJP5
SJS9105
SHW42N50
XTB3+ 8BFZ
XTB3+ 10BFZ
XSN3+ 8S
XSN26+ 5BN
XTB3+ 8BFN
XTB4+ 8BFN
XTB3+14BFN
XTN3+ 8B
AANnDNDNDNANN
S$ O| XTB4+8BFN
NS SK X784+ 8BFz
N10 S © | XTB3+8BFN
N10 SEK XTB3+8BFZ
N11 XSS3+ 4S
N12 XTBS3+ 8BFZ1
Plate, L.E.D
(Black Type)
Terminal Board,
Speaker
Terminal Board,
Input & Antenna
Socket, 3P
Shaft, Tuning
Spring, Dial Pointer
Dial Pulley
Drum, Variable
Capacitor
Spring, Drum
Cord, Dial (1.8m)
Bracket. Dial
Rear Panel
Bracket, Transparent
Panel
Shield Cover
Insulation Plate
Bracket. Terminal
Board
Shield Cover
Spacer
Bracket
Plug
Socket
Spacer
Tapping. &
Tapping, 63X10
63x8
62.6X5
Tapping. £3 X8
Tapping, &
Tapping, 4X8
(Silver)
Tapping, “648
(Black)
Tapping, D3 <8
(Silver )
Tapping, 43 X8
(Black)
3X4
Tapping With Detent,
3X8
(1)
(
(
(
(
(
1)
1)
1)
1)
2)
N14 XWA3B
N15 XWA26B
N16 XWG3
Spring, ¢ 3
Spring, ¢ 2.6
Plain, ¢ 3
NUTS
N17 XNS11
N18 XNS12
N19 SNE4021
ACCESSORIES
Al SSA901
A2 SQF11471
Cord, Antenna
Instruction Book
PACKING PARTS
WASHERS
N13 S | Xw011B
External Toothed
] spP6ag
SPS3069-—4
SPS3071—4
SPG4177
SGK1411
Polyethylene Bag
Pad, Left Side
Pad, Right Side
Carton Box
Lavel (Silver only)
Printed in Japan
82082300 ®SH/TN