SX550
User Manual: SX550
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The following locations in the text are incorrect. Please perform the corrections shown
below.
O C I R C U I TD E S C R I P T I O N
Incorrect
Correct
Page9 AM tuner line 1
dual
single
Page9 phono equalizer amplifier line B
metal oxide
carbon film
Page10 tone control line 10
- gdB
- 10dB
o EACHMODEL(SX-ssO/KU,
HG.S)
Power supply transformer connected to AF amplifier assembly is not a lead wire type,
but instead, it is connected by a terminal strip. Delete lead wire color indications and
write in terminal numbers indicated below.
sx-550/KU
sx-550/HG
SX-550/S
t3't
I s'-a
II
ffi
"T
*ilve-l:
ACnov
60Hr
O ^ @ , F U S EH o L D E RN o .
MWER IND
8v 50iA
O PAGE50
Changeprinted boardfuse Fu5 0.5A to 1.5A. ChangefuseFuB 1.5A to 0.8A.
ThisServiceManualis applicableonly to the KC, KU model.
sx-s5C'
CO N T E N T S
1 . SPECIFICATIONS
4
2.
CONNECTION
DIAGRAM
6
3.
FRONTPANELFACILITIES
7
4.
CIRCUITDESCRIPTIONS
I
5.
BLOCKDIAGRAM
12
6.
LEVELDIAGRAM
13
7.
DISASSEMBLY
14
8.
D I A L C O R DS T R I N G I N G
16
9.
10.
ADJUSTINGPROCEDURES
9.1 AM Section
9.2 FM Section
9.3 MPX Section
9.4 PowerAmplifier (ldle Current)
PARTSLOCATION
10.1 Front PanelView
1O.2 RearPanelView
10.3 Top View
10.4 Front View
1 1 . EXPLODED
VIEWS
11.1 Exterior
11.2 Part 1
(AWKO56}
11.3 Part2 AF As-sembly
11.4 Part3 RF Assembly(AWE-072)
12.
13.
SCHEMATIC
DIAGRAMS.P.C.BOARDPATTERNS
AND
PARTSLISTS
12,1 MiscellaneousParts
L ist.
12.2 SchematicDiagram
12.3 RF Assembly(AWE-072-0)
12.4 AF AmplifierAssembly(AWK-056)
12.5 AF MutingAssembly(AWM-101)
PACKING
SX-550/KU.HG. S AdditionalServiceManual.
17
18
19
20
21
23
25
27
29
31
33
34
36
37
40
47
53
55
EnclosedHerewith
1. SPECIFICATIONS
Semiconductors
F E T .s . . . . . . .
|Cs..........
Transistors....
D i o d e. .s. . . . .
.
3
. 5
. 2 8
. 2 1
Power Amplifier Section
ContinuousPowerOutput from 20 Hertz to 20,000 Hertz
(Both channelsdriven).. . 20 watt5per channel(8 ohms)
Total HarmonicDistortion(20 Hertz to 20,000Hertz,from AUX)
ContinuousRatedPowerOutput . . . . . . . No more than 0.3%
10 wattsper channelpower output,
8ohms..
No more than 0.07%
I watt per channelpower output,
8 ohms. .
. . . No more than Q.07%
IntermodulationDistortion (50 Hertz : 7,000 Hertz = 4 : 1, from
AUX)
ContinuousRatedPowerOutput . . . . . . . No more than O.3o/o
10 wattsper channelpower output,
8ohms..
No more than 0.07%
'I
watt per channelpower output_
8ohms..
No more than 0.07%
DampingFactor
(20Hr to 20,000H2,8ohms) .
. . . . . . . . . .2 5
I nput Sensitivity/lmpedance
PHONO .
2.5mV/50kohms
Mtc....
A U X. . .
TAPEPLAYI......
TAPEPLAY2......
TAPEPLAY2 (DlN connector)
PHONOOverload
Level(T.H.D.0.17o)
PHONO .
Output Level/lmpedance
TAPERECl......
7.5mV/50kohms
150mV/50kohms
150mV/50kohms
150mV/50kohms
150mV/50kohms
200mV(l kHz)
.... 150mV
TAPEREC2
....... 150mV
TAPEREC2 (DlN connector)
. 30mV/80kohms
. . . . . A , B ,A + B
SPEAKER
HEADPHONES.
. Low lmpedance
Frequency
Response
( R I A Ae q u a l i z a t i o. n
10.3d8
PHONO
. .). 30Hzto 15,00OH2
'loHz
AUX,TAPEPLAY . . .
to 60,000Hzli"dB
.
ToneControl
B A 5 5. . .
. . +9d8,-10d8 (100H2)
TREBLE.
. . . t 8 d B( 1 0 k H z )
Loudness
Contour(Volumecontrolsetat -40d8
position)
) ,r a g 1 1 9 k H . 1
. . . . + 6 d B( 1 0 0 H 2 +
six-s5C,
HumandNoise(lHF,short-circuited,
A Network,ratedpower)
P H o N o.
........70d8
A U XT A P E P L A Y . . .
........90d8
FM Section
Usable
Sensitivity
M O N O. . . . . . . I l.2dBf(2.0!v)
S T E R E O . . . . 20.0dBf
..
(s.spv)
50dBQuietingSensitivity. . . . . MONO . . . . .
(4.ssv)
18.3dBf
s T E R E O . . .. 3 9 . 2 d B( f5 0 9 V )
Signal
to NoiseRatioat 65dBf . . . . . . . MONO . . . . . . . 70dB
S T E R E. O
.....65dB
D i s t o r t ai ot 6n5 d B 1f 0 0 H 2. . . . . . . M O N O . . . . . . . . O ] S %
sTEREO.......03%
I kHz
MONO........O.15%
.
STEREO.......0.3%
6 k H 2 . . . . . . MONO.........o.4%
S T E R E .O. . . . . . O . 4 %
frequencyResponse.
. 3 0 H zt o 1 5 , 0 0 0 Hr23 : 3 d B
C a p t u r eR a t i o
...... l.OdB
A l l e r n a t e C h a n n eSl e l e c t i v i t y. . .
......60d8
S p u r i o uRse s p o n sRea t i o . . .
.....75d8
l m a gR
e e s p o nR
s ea t i o. . .
.......65d8
l F R e s p o n sRea t i o . . .
.. 90dB
A M S u p p r e s sRi oa nt i o . . .
.......50d8
MutingThreshold
.......
t 4 d B f( 2 . 8 p V )
- 15kHz)
StereoSeparation
(1kHz),
(30H2
40dB
30dB
SubcarrP
i erro d u cRt a t i o
........40d8
S C AR e j e c t i R
on
atio...
........40d8
Antenna
Input
.....
3 0 0 o h m sb a l a n c e d
75 ohms unbalanced
AM Section
Sensitivity(lHF, Ferriteantenna)
(lHF,Ext.antenna)
Selectivity
S i g n a l - t o - N o iRs ae t i o . . . . . .
lmageResponse
Ratio . . . ..
l F R e g o o n sRea t i o . . . . . . . .
. . . . 65d8
Antenna.
Built-inFerriteLoopstick
Antenna
Misceilaneous
Power
Requirements
....
PowerConsumption....
Dimensions
W e i g h.t. . . . . .
'l2OY
..
6QHz
. . . U L ;8 0 W ,1 8 5 W( m a x . )
csA;l55vA
mm
. . . . . . . .148(w)x141(H)x307(D)
17 a l 8 ( w ) x s - 9 / 1 6 ( H ) x 1/ 126- (l D )i n
W i t h o upta c k a g. e. . . . . . 9 . 4 k g( 2 0| b 1 1o z )
Withpackage
10.5kg(23 lb 2 oz)
FurnishedParts
FMT-typeAntenna
Operating
Instructions
NOTE:
Specificotio^s ond the design subject to
poscible modificotion without notice due
to improoementg.
2. CONNECTIONDIAGRAM
OUTDOOR
FM ANTENNA
T-TYPE
FM ANTENNA
AM ANTENNA
(lndoor or Outdoor)
C O N V E N I E N CO
EU T L
Unswitched (3OOWmax.l: Less frequent'
ly used components, which do not req u i r e c o u p l e d p o w e r , c a n b e p l u g g e di n t o
either of these outlets.
.ffi)
75o\LI-l
c o a xr a l l l
cable I I
A frequen
Switched (200W max.l:
used component (turntable, tape deck,
etc.) can be plugged into this outlet. By
leaving the power switch of that component in the ON position, power supply
to the component will be coupled with
the SX-550 switch operation.
' 3ooa
FM DE.EMPHASIS SWlTCH
"751ts".
Normaf ly, set this switch to
"251rs" only when
Be sure to set it to
listening to an FM broadcast (preemphasis; 25rrsec.)with a Dolby* system
NR adaptor connected between the
TAPE terminals.
r'"-'1
_[^*].r _!- _'l*'---t
: B E E E E E- :
GROUND
.m,
ffil
Til
@
RIGHT
LEFT
S P E A K E R S Y S T E M SA
TURNTABLE
I
I
I
OUTPUT
INPUT
DIN TYPE
CORD
loureur
CARTRIDGE
TAPE PLAYER
T A P ED E C K
( O p e n - r e e l ,c a s s e t t e )
6
T A P ED E C K
(Open-reel,
cassettel
LEFT
RIGHT
S P E A K E RS Y S T E M S B
3.FRONT PANEL FACILITIES
S P E A K E R S W T T C(HP O W E R )
A combinedpower ON/OFF switch and speakersystem
selectorswitch.
P O W E RO F F : Receiveroff.
A:
To select speakersconnectedto the A
s p e a k etre r m i n a l s .
OFF:
Speakerscut off ( h e a d p h o n e cs a n b e
used).
B:
Operates speakersconnected to the B
s p e a k etre r m i n a l s .
A+B:
T o l i s t e n s i m u l t a n e o u s l yt o s p e a k e r
systemsconnectedto A and B speaker
terminals.
FM STEREOINDICATOR
With rhe FUNCTIONswitch ser to FM, the STEREO
indicator lights while an FM stereobroadcastis beingreceived.
A M / F MT U N I N GM E T E R
W h e n t u n i n g i n F M s t a t i o n s p, o s i t i o nt h e n e e d l ei n t h e
center FM areafor optimum reception.In the caseof AM
stations,tune for maximum meter deflectiontoward the
r i g h to f t h e s c a l e .
PILOT LAMP
NOTES:
. After turning this switch ON there is a delay of some Z
to 9 seconds, during which time the muting circuit
operates to eliminate unpleasant noise.
c For easier operation, plug powgr cord for turntable, etc.
into the switched convenience outlet.
wnre
t\/N
P H O N E Sf A C K
To listen through stereo headphones,plug them firmly
i n t o t h i sj a c k .
WARNING:
Dct not plug a microphone into the PHONES jach as you
may damage the microphone.
B A S S& T R E B L EC O N T R O L S
Controls for adjustingthe tone. Adjust low frequencies
with the BASS control and high frequencieswith the
T R E B L Ec o n t r o l .
Turn controls toward the right (MAX) to enhance,and
toward the left (MlN) to reduce,their respectivefrequencyranges.
F M M U T I N GO F F B U T T O N
Leave this button undepressed(in the ON position) to
suppressunpleasantinterstationnoise while tuning between FM stations.Low-strengthsignalsmay alsobe suppressedby this function, so to pick up a weak station
depressthis button to the OFF position.
M O D ES W T T C (HM O N O )
For stereoplaybackleavethis switch undepressed.
When
depressedfor MONO playback, left and right channel
stereo signals will be mixed to produce monophonic
soundfrom both speakersystems.
NOTE:
Recordingstereophonicallywith the MODE switch in the
MONO position moy causechannel separation to deteriorate.
.
sx-s5cl
.EREO
ringre-
T U N I N GK N O B
S e l e c t t h e d e s i r e ds t a t i o n w h i l e o b s e r v i n gt h e A M / F M
m e t e rf o r o p t i m u mt u n i n g .
Switchfor selectingdesiredprogramsource.
For AM broadcastreception.
AM:
For FM stereoreception.Automatically
FM:
receives monophonically during FM
m o n o p h o n i cb r o a d c a s t sT. h e S T E R E O
indicator lightsup when the broadcastis
in stereo.
To operate a turntable connected to
PHONO:
P H O N Oi a c k s .
F o r l i s t e n i n gt o a n a u d i o c o m p o n e n t
AUX/MIC:
(cartridgetape player, TV sound tuner,
etc.) connectedto the AUX jacks.Also
set to this positionwhen usingthe microphone.
Note, when the microphoneis plugged
in, the componentconnectedto the AUX
i a c k sc a n n o tb e u s e d .
in the
of AM
rudthe
I LAMP
FUNCTION
lNM
rcNO
F U N C T I O NS W I T C H
LruOMS
rc JAcK
A h i g h i m p e d a n c e( a p p r o x . 5 0 k - o h m s )d y n a m i c t Y P e
m i c r o p h o n ew i t h a standardplug can be connectedto
t h i sl a c k .
T A P EM O N I T O R( 1 & . 2 ) B U T T O N S
V O L U M EC O N T R O L
on) to
ng be)e suprtation
. When
hannel
phonic
Clockwise rotation increasesvolume from speakersor
headphones.
BUTTON
LOUDNESS
Depressthis button when listeningat low volume. The
frequencyresponseof the human ear variesaccordingto
positioncompensates
the listeninglevel,and the depressed
by emphasizingthe bassand
for hearingcharacteristics
treble.
Set these switchesin the ON (depressed)
.positionas
follows:
1 . . . For playback or for monitoring of a recordingin
progresswith a tape deck connectedto the TAPE'1
i a c k s( R E C& P L A Y ) .
2 . . . As in 1 above,with a tape deck connectedto the
T A P E 2 j a c k s( R E C & P L A Y ) o T T A P ER E C / P L A Y
jack(DlN type).
NO?ES:
posio Leaueboth of these buttons in the undepressed'
tion when not using tape dechs as the sound source.
The signatfrom the sourceselectedby the FUNCTION
switch will be interrupted if switchesare left in the d'e'
pressedposition.
a When record.ingwith two tape dechssimultaheously,
do not operates the TAPE MONITOR I button as this
will interrupt .the signal to the TAPE 2 dech.
B A L A N C EC O N T R O L
in the
eterio-
Control for adjustingvolume balancebetweenleft and
right speakersor headphones.Clockwiserotation from
center increasesright channel volume, while counterleft channelvolume.
clockwiserotation increases
a
4 . C I R C U I TD E S C R I P T I O N S
F ig. 1 Tuner Section
TUNER SECTION
FM Front End
A frequency linear 3-gang variable capacitor is
used with a single stage FET RF amplifier. The
FET possesseshigh input impedance compared
with a transistor, and allows simple coupling with
the input tuning circuit, plus a significant advantage in terms of noise.
The local oscillator is a variation of a Clapp circuit
and its excellent temperature compensation
provides stable frequency even without AFC.
Local oscillator voltage is passed through a low
value capacitor to the mixer transistor base.
lF Amplifier and Detector
Composed of two dual element ceramic filters and
one IC (HA1137). The HAl1BT is a high density
IC and contains a limiter amplifier, FM detector
(quadrature detector), muting, and meter drive
circuits.
Multiplex Demodulator
The IC (HA1156W) used in this section does not
require a tuning coil and in addition to a pLL
stabilized switching signal generator circuit, it
contains a double balanced differential amplifier
switching system demodulator circuit and an auto_
matic stereo-mono selector circuit. An extemal
switching transistor controlled by the FM muting
signal provides automatic monophonic reproduc!t_91"t input sigrralsbelow the muting level (FM
MUTING switch OFF). The stereo demodulator
signal passesthrough the de-emphasis circuit, then
through an amplifier that combines carrier filter
and crosstalk canceller to produce the demodula_
tor output.
AM Tuner
Composed of a single IC (HA11BS) and dual
element ceramic filter. A 2-gar,:rg
variable capacitor
is employed with one stage providing tuning be_
tween the antenna and RF amplifier and the
other stage tuning the local oscillator. The RF
amplifier itself is not tuned but feeds direcfly to
the mixer followed by a 2-stageIF amplifier.
P H O N OE O U A L I Z E RA M P L IF I E R
IC (TA7136P1) is used with independent left and
right channels. Tolerances !2Vo styrole capacitors
and tolerances !1Vo metal oxide resistors comprise
the equalizer elements, leading to an RIAA deviation within 0.3dB from 30Hz to 15kHz.
*21
-1s
F i g . 2 P H O N OE q u a l i z e r
MICROPHONE
CIRCUIT
A single transistor amplifier (monophonic) is
provided in addition to the phono equalizer ampli_
fier. A selector switch cuts the AUX jack iniut
when a plug is inserted into the MIC jack. ihe
amplified microphone signal is then supplied to
both the left and right channels. The FUNCTION
switch is set to the AUX position when using a
microphone.
When the power switch is set to OFF, point C
potential instantly becomes - 16V. Q4 becomes
ON and C2 is immediately discharged. Since this
interval is extremely brief, the muting time remains
constant even if the power switch is again set to
oN.
Pornt B
C o n t r o la m P . 0 U T
F i g .3 M i c r o p h o n C
e ircuit
Power amp.I N
TONECONTROL
A CR network tone control circuit is employed in
which each attenuator circuit consists of a capacitor and a resistor. These function to increase and
decrease the relative levels of low and high frequency sounds. Since relative control over the frequency response by the attenuator results in a
constant loss, an amplifier (Q1 & Q2) is used prior
to this stage for compensation. The control ranges
are +8dB to -8dB for the highs (at 10kHz) and
+9dB to -gdB for the lows (at 100H2).
YR1:TREBLE
CONTfuL
VRz:BA55CONJROL
F i g . 4 T o n eC o n t r o l
A F M U T I N GA M P L I F I E R
When the power switch is set to ON, the potential
of point C in Fig. 5 instantly rises due to C3 &
Rb time constant, and Q4 becomes OFF. Point B
potential at this time gradually increases with the
C2 & Rg time constant and normally reaches-19V.
Q3 becomesOFF when point B is below -15.4V,
from which time point A potential rises with the
CL & Rl time constant and normally reaches
approximately 8V from R1 & R2. FET Q1 & Q2
operate when point A potential is above 0V. The
muting interval (T) extends from the time the
power supply is set to ON to when point A potential reaches 0V. This interval is set f.or 6 - 7
seconds.
C o n l r o l a m p .O U T
P o w e f a m o .l N
F i g .5 A F M u t i n g
OFF
POWER
Fis.6
P O W E RA M P L IF I E R C I R C U I T
Composed of differential first stage, all stages
direct coupled pure.complementary OCL circuit.
Open gain at lkHz is approximately 80dB and
NFB amount is approximately 50d8. R3 and R4
are provided with this circuit in order to obtain
adequate stability even with the NFB disconnected.
Q1 form a differential amplifier: IIOVo d.c. feedback is applied from the junction point of the
power stage to the base of Ql so the potential of
the junction point is always maintained at the
samelevel.
Fig.7 PowerAmPlifier
sx-55cl
POWERSUPPLY
High stability (ripple cancelling efficiency) is
required in the power supply circuit due to its
minimized output impedance. In the circuit shown
in the Fig. 8, Q1 is controlled by Q2, which detects
its output variations. Tuner power is taken from
Q3 emitter. Since this is at the power transformer
secondar5r,AC line variations do not directly reach
the tuner.
Power
Amp. *-Power Amo. +
Power
Anp.
+
It4lC Amp.
AF lrUT Amp
EQ Amp.
MUT Amp.
EQ Amp.
MUT Amo.
F i g .8 P o w e rS u p p l y
5. BL OC K DI A G RA M
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sx-55cl
6. LEVEL DIAGRAM
LEVEL
( dBv)
60
50
40
30
1 3 . s( 8
v 0)
20
10
rT---r
0
cr)
cr)
c!
c!
-10
I
AUX( 150mV)
-20
A
-30
c!
- 4 0 M I C( 7 . 5 m)V
I
2.5mV)
- 5 0 P H 0 N( 0
(r)
6
o
0 d B v :l V
F R E O U E N lCk Y
H :z
-60
t 5
7. D'SASSEMBLY
R E M O V ES I D E B O A R D S
Side board can be removed by taking out 4 screws
shown in figure. When reinstalling, observe that
space does not occur between them and front
panel.
NS
REMOVETOPPLATE
Take out 2 screwsshown in figure to remove.
six-E'5Ct
REMOVEBOTTOMPLATE
Take out 8 screwsshown in figure and pull rearwardto remove.
2
- c )
-*+g;{:':i';:-*
8
I
I
)/4 ":(
,:,"LW
R E M O V EF R O N T P A N E L
Use allen hex wrench to loosen tuning knob setscrew and remove knob. Pull off all knobs (except
push buttons), then remove shaft nuts of FUNCTION and SPEAKERS switches. Take out upper
left and right screws (2 screws) of front panel
and remove.
8. DIAL CORD STRINGING
1. Tie end of cord to inner stud of dial pulley.
2. Close tuning capacitor blades fully.
3. Pass cord through dial pulley opening, make a
half turn around pulley, then pa.ssin the route:
pulley A-dial needle-B-C-dialshaft-D-dial pulley.
4. Wind cord clockwise (as viewed Fom rear panel)
3 turns around dial shaft, then route to pulley D.
5. Wind 3 turns around dial pulley and tie to spring
so that the cord is under tension.
6. Turn TUNING knob and confirm that dial
needle moves smoothly.
7. With tuning capacitor blades fully closed, move
dial needle to starting point (left edge of scale).
8. Apply lacquer to tied ends of cord.
CAUTION:
Do not touch dial needle with the hand.
Handle dial needle only by the molded portion. Smudges
and finger-prints cannot be removed from metallic portion
of needle.
needle
D i a lp u l l e y
\
Dial shaft
B
r' ' zO- ' )
sx-Ei='Cl
9. ADJUSTING PROCEDURES
9.1 AM SECTION
1. Through a lk ohm resistor, connect an AM
signal generator to the AM antenna terminal.
Set for 400H2 at 30dB and 30% modulation.
2. Connect AC VM (Voltmeter) to TAPE REC
jack (L or R).
I
Set FUNCTION switch to AM position.
,l
Set AM SG and SX-550 dial indication to point
A (60OkHz).
Adjust T6 for maximum indication on AC VM.
o.
Set AM SG and SX-550 dial indication to Doint
C (1,400kH2).
7. Adjust TC4 for maximum indication on AC
VM.
8. Again set AM SG and SX-550 dial indication to
point A.
9. Adjust bar antenna core for maximum indication on AC VM.
10. Return AM SG and SX-550 dial indication to
point C.
11. Adjust TC5 for maximum indication on AC
VM,
12. Repeat steps 4-11 to eliminate variations in
AC VM indications at points A and C.
AC voltmeter
r:
tr@
1kohm resistor
9.2 FM SECTION
1. Through 300 ohm dummy antenna, connect
FM signal generator to the 300 ohm FM
antenna terminals and set for 400H2 at 100d8
and IOOVomodulation.
2. Connect AC VM and distortion meter to TAPE
REC jack (L or R).
3. Set FUNCTION switch to FM and MUTING
switch to OFF.
Set FM SG and SX-550 dial indication to point
A (90MHz).
Adjust T3 for maximum indication on AC VM.
(t.
Adjust T5 lower core for center of scale indication on Tuning meter.
,7
Set FM SG for 9dB output and adjust T1 and
T2 for maximum indication on AC VM.
8 . Set FM SG and SX-550 dia.l indication to point
C (106MHz).
9. Adjust TC3, then TC1 and TC2 for maximum
indication on AC VM.
10. Again set FM SG and SX-550 dial indication to
point A.
11. Adjust T3, then T1 and T2 for maxirnum indication on AC VM.
12. Repeat steps 8-11 to eliminate variations in
sensitivity at points A and C.
13. Adjust T4 for maximum sensitivity.
14. Detune to noise only and adjust Tb lower core
for center of scale indication on Tuning meter.
15. Set SX-550 dial indication to point B (98MHz)
and adjust FM SG for center of scale indication
on Tuning meter.
16. Set FM SG output to 60dB and adjust Tb
upper core for minimum distortion.
1?. Repeat steps 14-16 to eliminate variations in
minimum distortion position.
AC voltmeter
Distortionmeter
!*
Flvlsignalgenerator
u @
sx-55Cl
9.3 MPX SECTTON
1. Through 300 ohm dummy antenna,connect FM
signal generator to 300 ohm FM antenna
terminals.
2. Connect multiplex signal generator to externa.l
modulation terminals of FM SG.
3. Connect oscilloscopehorizontal input to MPX
SG pilot output and vertical input via probe to
TP (No. 31) of circuit board
4. Set SX-550 dial indication to 98MHz and adjust
FM SQ for center of scale indication on Tuning
meter.
5. With FM SG unmodulated, adjust VR1 so that
lissajous pattern on oscilloscope becomes stationary.
6. With MPX SG modulation 1kHz, L+R 67.5kHz
deviation and Pilot 7.5kHz deviation. adiust T4
for minimum distortion.
Oscilloscope
MPX signalgenerator
Distortionmeter
AC voltmeter
n
E
o
300 ohm
d u m m ya n t e n n a
l
l
-
9 . 4 P O W E RA M P L I F I E R( I D L E C U R R E N T )
1. Set BASS and TREBLE controls to FLAT
positions.
2. Connect DC voltmeter to circuit board TP
t e r m i n a l s( L = 3 4 o , 3 3 g ; f i , = 3 5 @ , 3 6 o ) a n d
adjust VR3 (L) and VR4 (R) for 25mV.
3. Readjust after approximately 15 minutes (speci
fication rangeis 15mV to 40mV).
DC voltmeter
E
io
1
10. PARTS LOCATION
10.1 FRONTPANELVIEW
Front panel assembly
ANB.417
i
-Knob(SPEAKER)
AAB.lOO
K n o b{ B A S ST, R E B L E )
AAB.O99
, ONO)
K n o b( F MM U T I N GM
AAD.l 1O
K n o b( T U N I N G )
AAA-036
Knob (FUNCTION)
AAB.lOO
Knob(VOLUME)
AAB.11O
Knob IBALANCE)
AAB.O99
'IO.2 REARPANELVIEW
tt tttIt tIt,tItl, Ittr,Il l llln, |||I| ||| |||||||||
il tIil l l l l tl, il n,tilllilllltf fftil il l l il ilrill
T e r mi n a l 4 P
AKB-027
T e r mi n a| ( A N T E N N A )
AKE.O28
23
D I N c o n n e c t osocket
r
(REC/PLAY)
A K P0 1 1
A C s o c k e t( A C O U T L E T S )
AKP OO4
nl llil |l tl il il nttnttnilnrtl\tr\\\\\\\\
| |ll || || || || |lIIIIlltttltntttn\t\\\\\\\\\
AC power cord
ADG.OO5
Fusecover
AEC 249
T e r m i n a( lS P E A K E R S )
A KE-029
F e r r i t eb a r - a n t e n n a
AXB.O06
10.3 TOPVtEW
Acrylic board
AEC,240
I
I
FW
**frn-Jr-
Tuningshaftassembly
AXA.117
RF assembly
AWE.O72
Dial pulleyassembly
AXA,O66
Electrolytic
capacitor
ACH-055
s)<-550
L a m pa s s e m b l(yP L 1 , 2 , 3 )
AE L 060
;'o I
(3,
Jl.
Powertransformer(Tl )
ATT.263
AF assembly
AWK 056
A F M U T I N Ga s s e m b l Y
AWM,1O1
1O.4 FRONTVIEW
IVleter
AAW053
P h o n ei a c k ( P H O NE S )
AKN-OO9
s e l e c t o sr w i t c h( S P E A K E R
)
ASA-042
, REBLE)
V a r i a b l er e s i s t o(rB A S S T
ACV.138
Pushswitch (Fl\,1lvlUTlNG,IVIODE)
ASG.O92
V a r i a b l er (
ACV 126
Tuning shaft assembly
AXA-1 17
P h o n ej a c k { M l C )
AKN,011
Selectorswitch
(FUNCTION)
ASD.O48
1,2)
P u s hs w i t c h{ L O U D N E S ST,A P E l \ , l O N l T O R
ASG-093
V a r i a b l er e s i s t o(rV O L U M E )
ACV 161
Variable
r e s i s t o(rB A L A N C E )
ACV,126
1 1 . E X P L O D E DV I E W S
RT 3x8
AB4-066
11.1 EXTERIOR
Acrylic board
AEC-240
L a m pa s s e m b l (yP L 1 .2 , 3 )
AEL-O6O
RT 3x8
ABA.066
Screw
ABA-113
Wire connector
AEC-308
@.
Sideboard(L)
AMS-012
ptate{L}
.-.AAH-027
RT 3x6
capacitor"'..ACG-001
%,
'\
Dial scaleboard
AAG.I13
_6
d--
€..
d
eP'
| <^'.
RT 3x6
BM 3x8
I
\a
e'
N y l o ns h e e t
Dial pointer
A
EC-191
AAF-046
(
F
M
M
O
N
ITOR)
M U T I N G ,M O N O .L O U D N E S ST,A P E
Knob
AAD-110
t
Washer
B22-017
Wi'Nt
-<[,-'''t
.,..-'
sprins
ABH-025
SPacer
AEC-301
Front panelassembly
ANB.417
Washer
822-017
Nut
871-005
K n o b ( S P E A K E RV, O L U M E .F U N C T I O N )
K n o b( T U N I N G ) A A B - 1 O O
AAA-036
d
sx-5E'o
NOTE:
Partsindicatedin greentype cannotbe supplied.
RT3x6
ffi
roard{L)
.012
T e r m i n a 2l p
I M O D E LK U }
RT3x8
Plate
A N E - 1 2(0K U ,K C )
"''.
PART 1
Seepage3l
Plate{L)
.AAH.027
tor "\
)01
\
E)
Plate(Rl
AAH-028
Unionnut
ABN-025
%
Screw
ABA.113
%
eP'
S i d eb o a r d( R )
AM$013
?&jc
"c
' ---.':'i,--'--.-J-f
-n"
@
I
RT 4x10
R T4 x 1 0
Foot assemblY
AEC.O83
Screw
ABA.OO2
11.2 PART 1
NOTE:
If set is a Kt
screwdriuer.
in dcmage. '
oppoeite scrt
thii screw.
Powertransformer
4TT-263(KU)
ATT-305(KC)
RT 4x8
q
q-
RT3x6
.-\
\\
_-'1
RT 3x6
.N
\
-fi''
P l a t e( L )
AAH-O27
?<
AC soc
AKP.OO
---t-'t"'--...
. .-Pulleyshaft
M49-025
Angle
Electrolyticcapacitor(C6,7) ANF-435
ACH-055
-'E
t?
l__,
RT 3x8
f,Tw
YI
RT 3x6
Rr 3x6 t
P
Clip
AEC-036
PART 3
Seepages34
RF assembly
AWE.O72
31
,?q
% t
t 7 Screw
RT 3x8
PART 2 Seepase33
AF assembly
AWK-054(KU)
(KC)
AWK_056
1 e-r*ta-\
ABA-122
RT 3x6
NOTE:
If set is a KC model, this screw cannot be remoued with a
screwdriuer. Forcibly attempting to remoue it will result
in damage. To remoue the fuse couer, first tahe.out the
oppoqite screw, then turn the entire fuse couer to unfasten
this screw.
NOTE:
Partsindicatedin greentype cannot be supplied.
ffi
RT 4x8
Fusecover
AEC-249
\
RT3x8p
T3x6
W-
-.a'*.,
/ / /
RT3x8
AC socket(AC OUTLETS)
AKP.OO4
T
,-
Angle
) ANF-435
AC power cord
ADG.OOS
/
'r*;J.,*,"*\
AXB.006
___d
_d
RT 3x6
W
Y
fl
42,
?
.' _4
d
'
Switch
AEC-015
l/{
RT 3x6
Tuning shaftassembly
AXA-I17
Sheet
AEC-250
%
)
Pulleyshaft
M49-025
Pulley
AEC-101
RT 3x6
Washer
822-016
{
Nut
_d
871-oo4
r3x6
^, ON) fil
l\-
lw
de-q
W i r eh o l d e r
AEC-299 RT 3x6
]
s
Spacer
AEB-079
P l a t e( R)
AAH-028
^&
RT 3xg
Screw(GND)
AKE_031
sx-55cl
11.3 PART2 AF ASSEMBLYAWK-056
NOTE:
Partsindicatedin greentype cannotbe supplied.
CapacitorcoverAEC-279(Model KU)
P h o n ej a c k ( P H O NE $ l
AKN.OO9
Selectorswitch (SPEAKER)
ASA-042
' V a r i a b l er e s i s t o r
ACV-138
RM 3x6
P u s hs w i t c h( F M M U T I N G ,M O N O )
ASG-092
A.
^ -\D
I
E
d
/
s
ffi
RT3x6
Nut
871-004
Spacer
AEC-248
PM3x8
I
E'
e
I
e
ffi
F u s e( 1 . 5 A )
AEK.104
I
I
o
Washer
822-016
AF muting
assembly
AWM.101
i\
$ *
Fuse(0.8A)
AEK-I11
Insulator
AEC-239
N TFuseclip
RT3x6
RT3xO
Fuse(4A)
AEK.lOO
$ r s I A K R . O I (3K
w
l
T e r m i n a (l S P E A K E R S )
AKE-029
K
A K R - O 3(O
e'
tu
Fuseclip
A K R - 0 1 (3K C ) Aw U l
(KU}
AKR.O3O
S l i d es w i t c h( D E - E M P H A S I S )
ASH-015
l \
I
r
l
t
l d )
as
RT3x6
fr
H e a ts i n k
ANH.117
RT3x6
.J5
NOTE:
11.4 PART 3 RF ASSEMBLYAWE-O72
Partsindicatedin greentype cannotbe supplied.
V a r i a b l er e s i s t o r
V a r i a b l er e s i s t o r
ACV-161
Pushswitch
ASG-093
S e l e c t osr w i t c h( F U N C T I O N )
ASD-048
P h o n ej a c k ( M l C )
AKN-011
871-004
PM 3x6
5 P c o n n e c t o sr o c k e t( R E C / P L A Y )
AKP-o11
Washer
822-016
T e r m i n a4l P
AKB.O27
Variable
capacitor
ACK-012
T e r m i n a(l A N T E N N A )
AKE-028
Ffu\
J'
l?
-"^?
u
RT3x6
34
rut
Dial pulley assembly
AXA-066
six-s5c,
WASHERSAND NUTS
OF SCREWS,
NOMENCLATURE
The following symbols stand for screws, washers and nuts asshorvnin explodedview.
Dascription
Symbol
Shape
Shape
D$cription
Symbol
I
I
@
EW
E type washer
nrrl
FW
Flat washer
@ i l
s:
sw
Spring lock washer
@
N
Nul
F
WN
Washer faced nut
Oval countersunk head tapping
screw
D:
tTw
Internal toothed lock washer
@ i l
PM
Pan head machine screw
0E
OTW
Outernal toothed lock washer
# l
CM
Countersunk head machine
screw
sc
Slotted set screw (Cone pointl
C E D
ocM
Oval countersunk head
machine screw
F=
SF
Slotted set screw (Flat point)
c E l
TM
Truss head machine screw
F
HS
Hexagon socket headless sel
screw
@
BM
Binding head machine screw
F
ocw
Oval counterzunk head wood
screw
PSA
Pan head screw with spring
lock washer
GE
cw
Countersunkheadwood screw
PSB
Pan head screw with spring
lock washer and f lat washer
RW
Round head wood screw
PSF
Pan head screw with f lat washer
GH
d:
RT
Brazier head tapping screw
PT
Pan head tapping screw
BT
Binding head tapping screw
CT
Countersunk head taPPing screw
TT
Truss head tapping screw
ocT
)-
\D
$
O E
@fl
D
EXAMPLE
T T
-lensth
|
I
in mm ( / )
d i a m e t e irn m m ( d )
Symbol
trF
ffi'
FW 9dx1t
L-tni"knessinmm(r) +'
l-T
I
I
inmm(d )
diameter
q
Symbol
35
12. SCHEMAf,IC DIAGRAMS. P.C.BOARD PATTERNS
AND PARTS LISTS.
12.1
PARTSLIST
MISCELLANEOUS
NO?ES:
:";:#:::::":":.:^i;'::i::':;f"::::::l,o{,un,*,*n
CAPACITORS
TR
MM
FR
OIILLSS
AN
ND
D CO
T
RAANNSSFFOORR
ES
RS
Description
Symbol
T1
Power transformer
T2
Bar-antenna assembly
Part No.
Description
Part No.
Symbol
ATT.263 (KU)
ATT-305 (KC)
AX8.006
c1
c2
c3
c4
c5
Ceramic
Ceramic
Ceramic
Ceramic
Ceramic
0.01
0.01
0.01
0.01
0.01
250v
125V
50v
50v
50v
ACG-001
ACG-003
CKDYFt03z 50
C K D Y F 1 0 3 25 0
CKDYF 1032 50
c6
c7
c8
Electrolytic
Electrolytic
Ceramic
6,800
6,800
0.O1
35V
35V
50V
ACH-055
ACH-055
C K D Y F 1 0 3 25 0
LAMPSAND FUSES
Part No.
Description
Symbol
Lamp assembly(8V, 3O0mA)
Lamp assembly(8V, 30OmA)
Lamp assembly(8V, 30OmA)
Powerindicator (6V, 50mA)
Stereoindicator {6V, 50mA)
AEL.O6O
AEL-O6O
AEL-O6O
AEL.O62
AEL-061
FU1
FU2
FU3
FU4
FU5
Fuse(4A)
Fuse(4A)
Fuse(0.8A)
Fuse(0.8A)
Fuse(1.5A)
AEK.lOO
AEK-1OO
A E K - 11 1
AEK-l11
AEK.104
FU6
Fuse(4A)
A E K . lO O
PL1
PL2
PL3
PL4
PL5
RESISTOR
R1
Part No.
Description
Symbol
Carbon film
2.2M
%w
RDY.PS225J
ExternalAppearanceof Transistorsand lCs
2 SA 8 16
2 S8 5 9 6
2 S D 3 1 3c
2S D 5 2 6
9roilt2trl41516
E
c
B
25A697
2sA725 ITFEg
2S,C1211w>-B
25C1312
llii33w,".",
89loll12l3l4
2sA7s8
ffi"
i333i:^61';
438
2SC1
36
,"bHolsb['\
HAl156w-P
0USw
TA7136P1
Indox
2sc461
ftz 2SC535€--l
e
2sK55
ryGA
DIAGRAM
12.2 SCHEMATIC
...
i
SWITCHES
SI SPEAKERS
1. POWEROFF
S5
2 f f i
RF AsS'/
i
3
SP OFF
+ . S P B
5. SP A+B
AWE-0?2
o,-zsciEil--l
o,2St
AWK-054 No.7
27
26
A W M . 1 0 1N o . 8( - 1 9 V )
A W K - 0 5 4N o . 3 2( - 1 9 V )
3 ----
1 + AWK-054No.13(+21V)
+ A w l \ i l - 1 0 1 N o . 6( + 2 1 V )
12,4
AF AMPLIFIERASSEMBLY(AWK.O56}
t;
v R ,: 1 P E g 1 ,
CONIR|]L
v8?, BASS
2l
30
l
HIC Amp
15
3ov
ll
nto?,0'o
',
I0NE Amp
l6v
E l 2
T U NE R
13.4V
TONE
Amp
'
r6v' 31
HEADA'np3i
-ts.?v
a,12sc94sA
0,32SD313
#,
,rdfr,,rr33r,
;6
Rl
10| VzY^1)
@o-o@
5 P _B
tsA'
rn@
Qz
@-tr
@
\o
/6
o
-{F
1 65 6 P
o62sf,1211
q0250526
06'4
0.8A
f\oFUr
l='
08,
IO
FUa
t5,
rc
E
25
3t
A Cl 2 0 v
"Additional ServicelManual
For AWK-054 serviceinJormationreferto page2 of
Q39
--. -.-*
n5l
i
ti.
j.
r*. "'"&l :
tst*#Ji&++
,llllixT"W#
t;t
.#ll
r.r*F E
AWM-101
No.8(-19.2V)<--r
AWE-072
No.2(-19.2V)L
No.6(-16v)
1
AC 220/2+0V
5 0 / 6 0H r
;-l
6*
rt
I
h41/lo
:: '
&
VRr
VOLUIIECONTROL
$., Q,52SAtl25 -z
Q r , a n 2 S C 1 3 1 2* z
MWER INO
8V 50nA
lE ri6
i
L
,,=,
: X
.E
I
_l
DIAL
INO
6V S0n'Ax3
4
six-s5o/HG
2.2 AF AMPLIFIERASSEMBLY(AWK-061}
D
I
f
i S .+- -r _d
L_
Sw
V R r, T F t s t t
(0NrR0t
!8, IIAS
S
.IN IHII
ll
?r(
l0
i
ar2scr+38
:
a62sct2ll
qo250S26
R r o: 2 K
.!
30v
a,e2sc9,1s^
0,32!03r3
0 , ,- 0 , .
ll
l6v
F
TUNER
134V
'
I(lNE Amp l
-t6v
J
&.-3.5r(oE250313 _32v
-ls.?v
u t r _
rr,.,8Z-320
IHG
0s
0s
lP
2SCl21l 250526
rr:lr
o99o
=s
'?:1\
:
::
'..' n:l'6
D". r,. ERC0I-02'a
fue
@o-oo
o38
039
Ifr
'l'
T
|fl,",
H
L_l
o3t
,,,I {i*
lll
;H--:i;"t*
lr
il
'l
'l'
.nf
_g*qffi--p'
"-q,F.#,.,r,.^
|;a
'-ti"-
Bi'nii'"
',"--an-,..,
r
t*".
r.. ----;jll!:
o'?ili*-'*"
**;;,r,it6vj-;
u50 ,s.
| ,
lii '''**;#1,"
".i
HlwEE'I
--*:-5 I ., l-tFl
" l"'.r|**ntr;'#
3! ao rlt / $ t " | , "
?scrrl I
151
{l 1.,.
'le|"rc ---I
Ji',:"
o'"
l)4 ".;l!; ',
o z,
""b. t-ffi"v;.1,i*-"-;.",
y.;',.;r =;iil
,"3,,{u
^"v-F$-;1hl
? 'ja
-i:i t-'
-ffi'-15-
Ji:
st:#;-.
*fu
-i -4q;i:8"T,.
'-ffi-.
- t
v"Qi*lflq
A W E - 0 7 2N o . 6 ( - 1 6 V ) - - 3 1
AWIV'101 No.7 (-l6V) <-
I
32
."o-T*
":.*
#
l
=
I
*::' I
' rg -til;-.::];nl--,,,u",
A W M . 1 0N1o . 8( 1 9 . 2 f
AWE-072
No.2 l-152V1+-
z(
'H-*vf
t 3"";"#"+l_
a-"**:- lll
" "*.1
X
.
"
I
o
" "
l6V
A W M - I 0 1N o . 1 < -
Br-no
28
J
A W E - 0 7 2N o . 1 8 ,N o . 3 5+
A W E - 0 7 2N o . 8( + 1 6 V )< -
A W E - 0 7 2N o . 3( + 2 1 V )'
A W M - 1 0 1N o . 6( + 2 1 V )
A W E . 0 7 2N o .
Eix-s5Ct,/HGi
BLU
BLU
23
GRN
GRN
19
ilhrl
ftft H
.-TI\.-
{3
JJt
:{-.
ln"*
,nzzot.
"F.'
I
RED
IAWM-101
No.g
21PL
,9t., ( )r..@r..@
I"'
I
" n.t
m,eT
30
tuaI
21
1]]l
-1
Dtl
---------'AWM29
101 No.4
1 -AWM-101 No.s
2
3 ---
k
zAWM-101
No.2
.1**yE
*"
l?,
o18
ri)2.
ra6k +
c-{ }-
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AWE.072No.8 (+16V)
AWE-072
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A W N 4 - 1N
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A W E . 0 7 2N o . 7
S T E RE O I N D
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AWE-072No.11
AWE-072No.12
AWE-072
No.26
AWE-072
No.27
AWE'072No.9
sx-sE'o/HG
PartsList of AF Amplifier Assembly(AWK-0611
SEMICONDUCTORS
Symbol
o1
a2
o3
04
o5
Doscription
RESISTORS
Pan No.
Transistor
Transistor
Transistor
Transistor
2SA79A-For G
2SA798-For G
2SC1438-8
or V
2SC1438-8or V
2 S C 1 2 l1- D o r E
Transistor
Transistor
Transistor
Transistor
Transistor
2 S C 1 211' D o r E
254697-Dor E
2SA697'Dor E
25D526-0or Y
2SD526O or Y
o1 |
412
013
o14
015
Transistor
Transistor
Transistor
Transistor
258596-0or Y
258596-0 or Y
2 S D 3 1 3 - oEr D
2SC945A-Ror O
2 S D 3 1 3 - oEr D
016
Transistor
2SA816-0or Y
D1
D2
D3
D4
D5
Diode
Diode
Diode
152413
152473
STV3H
STV3H
WO6A
D7
D8
D9
D10
Daode
Diode
Diode
Diode
Diode
W06A
ERC01,02
E R C 0 -l 0 2
ERC01-02
ERC01-02
Symbol
olo
D11
D12
Diode
D13
Diode
D14
Diode
D15
Zener diode
1S1886
or S1801-02
1S1886
or 51801-02
1St 886
o r 5 1 8 0 10 2
1 S1 8 4 6
or Sl B01-02
w2.140
o17
Zener diode
BZ-320
SWITCHES
Symbol
Description
s1
s2
Part No.
ASA-042
ASG-092
corLs
Symbol
L1
I
Doscription
Choke coil
Choke coil
Pan No.
ATH,O11
ATH,O11
Part No.
Variable resistor l00kA2
Variable resisror 1O0kA2
Semi-Iexed resistor
Sem;fexed resistor
ACV r38
ACV,r38
c92-063
c92,063
R3
R4
R5
Carbon film
Carbon {ilm
Carbon film
Carbon film
Carbon film
10k
10k
3.3k
3.3k
't
0k
RD%PSI O3J
RD%PS1O3J
RD%PS332J
RD7.PS332J
RD7.PS1O3J
R7
R8
R9
R10
Carbon film
Carbon film
Carbon film
Carbon film
Carbon film
10k
2.1k
2.7k
56Ok
560k
RD%PS1O3J
RD%PS272J
RD%PS272J
RD%PS564J
RD%PS561U
Rl1
R12
R13
R14
R15
Carbon film
Carbon film
Carbon film
Carbon film
Carbon film
56k
56k
2.2k
2.2k
39k
RD%PS563J
RDY.PS
563J
RDY.PS222J
RD%PS222J
RD7.PS393J
R17
R't8
R19
R20
Carbon film
C a r b o nf i l m
Carbon film
Carbon film
Carbon film
39k
1.6k
1.6k
2.2k
2.2k
RD%PS393J
RD%PSI62J
RD%PS162J
RD%Ps222J
RDY.PS222J
R23
R24
R25
Carbon film
Carbon film
Carbon film
Carbon film
Carbon film
56k
56k
2.2k
2.2k
4.3k
RD%PS563J
RD%PS563J
RD%VS222J
RD%VS222J
RD%PS432J
R26
R27
R28
R29
R30
Carbon film
C a r b o nf i l m
C a r b o nf i l m
C a r b o nf i l m
Carbon film
4.3k
1.1k
'1.1k
180
180
RD%PS432J
R D % P S1 1 2 J
RD%PS112J
R D Y 4 V 1S8 I J
R D % V S1 8 i J
R31
R32
R33
R34
R35
Carbon film
Carbon film
Carbon film
Carbon film
Metal film
150
150
150
150
0.5
151J
RD%PS
R D % P S1 5 1 J
R D % P SI 5 1 J
R D % P S1 5 IJ
R N 2 HO R S K
R36
R37
R38
R39
R40
Metal film
Metat fitm
l \ / e t a tf i t m
Carbon film
Carbon film
0.5
0.5
0.5
10
10
R4l
R42
R43
R44
R45
Carbon falm
Carbon film
Metal oxide
Metal oxide
Metal oxide
VR2
VR3
R1
o6
o7
o8
Dsrcription
R21
2W
2W
2W
2W
't0
t0
r50
150
1k
2W
2W
2W
R N 2 HO R 5 K
R N 2 HO R S K
R N 2 HO R 5 K
RD%PSF1OOJ
RD%PSF1OOJ
RD%PSl OOJ
RD%PSl OOJ
R S 2 Pr 5 1 K
R S 2 P1 5 rK
R S 2 P1 0 2 K
Part No.
Descript ion
Symbol
P6rt No,
Description
Symbol
ccDsl s60Ks0
c E A 2 2 l P6
R S 2 P1 0 2 K
RD%PSF22OJ
1O2J
RDY.PSF
RD7.PS152J
RD%PS212J
c17
c18
cl9
c20
Ceramac
Eleclrolytic
Electrolytic
Electrolytic
Electrolytic
56p
220
220
47
47
50v I
6v
I
RD7.PS163J
RD%PS153J
RD7.PS332J
911J
RD%PS
RD%PS432J
c2l
c22
c23
c24
c25
Ceramic
Ceramic
Electrolyric
Electrolytic
C€ramic
22p
22p
100
100
1oop
sOV I
sov I
510
3.6k
R T s B7 5 1 K
RDY,PSF22OJ
R D Y . P S5F1 1 J
R D T a P5S1 1 J
RD%PS362J
c27
c2a
c29
c30
Ceramic
Ceramic
Ceramic
Ceramic
Ceramic
1OOp
100p
't00p
0.04
0.04
50v
50v
50v
50v
50v
c c D s l 1 0 1 K5 0
ccDsl 10'lK 50
c c D s Lr 0 1 K5 0
CKDYF 4032 50
cKDYF403250
R65
Carbon film
Carbon film
Carbon film
Carbon film
Carbon film
1.1k
3.9k
lk
11k
i 5k
R D 7 4 P1S1 2 J
RDr/.PS392J
RD7.PS1O2J
RD7.PS113J
RD7.PS153J
c31
c32
c33
c34
c35
Ceramic
Ceramic
Ceramic
Ceramic
Ceramic
0.01
0.01
0.01
0.or
0.0r
15OV]
150v
150v I
150v I
150v I
ACG-004
AcG-004
AcG-004
AcG-004
ACG-004
R67
R68
R69
R70
Carbon film
Carbon Iilm
Carbon lilm
Carbon film
Carbon film
15k
5.6
5.6
5.6
5.6
R D % P S1 5 3 J
RD%PSF5R6J
RD%PSF5R6J
RD%PSF5R6J
RD%PSF5R6J
c37
c38
c39
c40
Ceramic
Ceramic
Ceramic
Electrolytic
Electrolytic
0.01
o.ol
0.01
220
100
1s0v I
1s0v I
r50v I
50v I
AcG-004-0
AcG.004-0
AcG-004-0
c E A2 2 1 P5 0
Carbon film
Carbon film
Carbon film
11k
120k
120k
R D % P S11 3 J
RD%PS124J
RO%PS124J
'100p
R7l
R72
R73
100
'to0
50v I
r6v I
2sv
I
Electrolytic
470
sov I ceo+zteso
c46
c47
c48
c49
c50
Electrolytic
Electrolytic
Electrolytic
220
220
100
5 0 v I c E A2 2 1 P5 0
50
50v
CEA221P
35
35V
C E A1 0 1 P
L
c5'l
Electrolytic
R46
R47
RZIS
R49
R50
M e t a lo x i d e
Carbon tilm
Carbon film
Carbon film
Carbon film
1k
22
lk
1.5k
2.7k
R51
R52
R53
R54
R55
Carbon film
Carbon {ilm
Carbon film
Carbon film
Carbon lilm
16k
15k
3.3k
910
4.3k
Wire wound
Carbon film
C a r b o nf i l m
75O
22
510
Carbon film
Carbon film
R57
R58
R59
R60
R61
R63
2W
5W
CAPACITOBS
Pan No.
Description
Symbol
c1
c2
c3
Efectrolytic
Electrolytic
Mylar
Mylar
4.7
4.7
0.00'12
0.0012
25V
25V
50V
50V
c5
Mylar
0.0056
sov
C E A N L4 R 7 P2 5
C E A N L4 R 7 P2 5
c o M A 1 2 2 J5 0
coMA 122J50
coMA 562J50
c6
c7
c8
c10
Mylar
Mylar
Mylar
Mylar
Mylar
0.0056
O.O22
O.O22
0.06a
0.068
50V
sOV
50V
50V
50V
coMA
coMA
coMA
coMA
coMA
cl1
c12
c13
c14
cl5
Electrolytic
Electrofytic
Ceramic
Ceramic
Ceramic
'l
25V
25V
50V
5OV
50V
c s z A 0 1 0 M2 5
cszA 01orvl25
ccDSL 560K 50
ccDsL 560K 50
ccDsL 560K 50
10
1
56p
56p
56p
562J 50
223J 50
223J50
683J 50
683J 50
c42
c43
c44
c45
Ceramic
Electrolytic
Electrolytic
-....'..
6v
2sv
25v
6v
6v
sov
I ceazzreo
cEA 470P25
CEA47OP25
I
]
CCDSL220K 50
ccDsL 22oK 50
I centorpo
I cearoree
c c D s l 1 0 l K5 0
sov I cer rotnso
c c D s l 1 0 1 K5 0
cEArolPt6
c€A i0r: 25
I
100
,uu | "ao ''o*,u
't
o0
35V
I
C E A 1 0 1 P3 5
OTHERS
Descriptaon
Symbol
Fuseclip
Part No.
AKR.OlO
sx-sss5c,/HG
R E A RP A N E L
Line voltage
selector
AKX-037
AC socket
(tNLET)
AKP.OOS
T e r m i n a2
l P
AKC-030
Socket(FM Antenna)
AKP-o16
2.4 MISCELLANEOUS
PARTSLIST
Only components that differ from
model are listed below.
those used in the KC
CAPACITORS
FUSES
Symbol
FU1
FU2
FU3
FU4
FU5
FU6
Description
Fuse
Fuse
Fuse
Fuse
Fuse
Fuse
44
4A
1A
1A
1.6A
2A
Part No.
AEK-4OO
AEK.4OO
AEK-402
AEK-4O2
AEK-405
A E K - 0 17
Symbol
c1
c2
c9
Symbol
T1
L1
Doscription
Power transformer
R F c h o k e - c o i l 1 0 1k
Part No.
ATT.327
T24-030
Ceramic
Ceramic
Ceramic
0.01
0:O1
0.01
Part No.
50V
50V
25OV
C K D Y A 1 0 3 25 0
CKDYA 1032 50
ACG-001
OTHERS
Symbol
COIL AND TRANSFORMER
Description
E),escription
Top plate
AF amplif ier assembly
O p e r a t i n g i n s t r u c t i o n s ( E n g li s h )
(German/ Frrinchl
Packing case
Part No.
A N E -1 3 1
AWK-061
ARB-183
ARD-093
AHD-350
3. SX-550/s MODEL
3 . 1 R E A RP A N E L
ffi
AC power cord
ADG-OO2
\
6-,
Linevoltageselector
AKR-031
De-emphasis
switch
ASH-017
3 . 2 M I S C E L L A N E O UPSA R T SL I S T
Only components that'differ
model are listed below.
from those used in the KC
FUSE
OTHERS
Symbol
FU6
Description
Fuse
Part No.
44 (110V.120V)
2A (220V,240V1
Symbol
A E K . lO O
AEK-103
T1
CAPACITORS
Symbol
c1
c2
Description
Ceramic
Ceramic.
0.01
0.01
Part No.
2SOV
2SOV
ACG-001
ACG-O01
Description
Top plate
AF amplifier assembly
Power transformer
Capacitor cover
Vinyl bage
Fuse 2A
Fuse 44
O p e r a t in g i n s t r u c t i o n s
Packing case
Part No.
ANE-131
AWK.O59
ATT-323
AEC-099
Eil-033
AEK-103
A E K . lO O
AR8-182
AHD-348
3.3
SCHEMATIC
DIAGRAM
RF Ass'/
SVYITCHES;
sr SPEAKERS
I. POWEROFF
2
SF'T
3. SP ,OFF
+. SPts
5. SP A+B
AwE -o?2
)5
l ,
Sz
q^
vJ
t0P
3000:
F:!t.,r l ,::,1
S+
- ,:',
-
oFF l-
LOUDNESS
OFF -
CAPAC.ITORS;
turF uNLEss 0rl
ON
l-l
FUNCTION
I
At1
2. FM
3. PHONO
4
AUx/t1tC
m0N0
-.o;uNrroR
RESI$TORS;
lN OHM, l,/4w, 15
OTfiERWISENOTE
DE EI1PHASIS
50^,S-251^S
?5,.,S-
FM tvlUTtNG
0N '1OFF
Mnntr
"S"ienfo
TAPE MONITOR2
oFF
0N
1
0N
v
: SIGNALv0L-,A
14V,/gQ oUTP
: DC VOLTAGEA
(LINE VOLTAOE)
F U S EH O L D E R
I . ' 0 v A . l z o v 3 . 2 2 0V 4 . " 4 0 V
P r. R
'
rl
-,
)tc.F
MET
o
@
a
032SC46l
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cr
Dr
z
&
9
' a
CJ
4'10
' ' --l
AM
BARAIJT '.
rs2
C1033/10
1
16
2
15
4
3
5
0. HAils?
6
14
:Sl
.:
ll
16
t3
t2
[3vlew
ti
a r
"eS
l o ?
062SC9
r0/16
Ru,
G6;il
R cn
L ctr
:. :; r',,,',,-1::'
lr"-fl vrc
iH l
?u;
Ql,0s
2SA'12
Ce,r{l/lo;
VRz
BALANCE
CONTROL
VR:
r6'rti
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L l -
Q^Crcc
V0LUffi CONTR0L
Qr.,Q'52SA?25 'z
PHoN0
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30v
0,.zSC945A
o , r2 5 D 3 l 3
-D alSl886'a
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H E A DA n p
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