Pioneer SX-202 User manual

(v)
rrtoNeerl
3
4
5
6
8
9
ORDER
NO.
ARP-230-O
sx-?;0e-
MODEL
SX.2O2
(SX.2O2LI
COMES
IN SIXVERSIONS
DISTINGUISI.IED
AS FOLLOWS:
additional
service
manual.
o Cemanueld'instruction
serefdre
aumode der6glage,
enfrangais.
. Este
manualdeservicio
tratadelm6tododeaiusteescritoenespaiiol.
CONTENTS
't. sPEctFtcATtoNs
.
....
2. FRONT
PANEL
FACILITIES
3. PABTS
LOCATTON
. . . . . . .
4. BLOCKDIAGRAM
5. CIRCUIT
DESCRIPTIONS
6. PACKING
7. EXPLODED
VIEW
AND
PARTS
LIST
...
8. P.C. BOARDS
CONNECTIONDIAGRAM
9. SCHEMATICDIAGRAM
10. ELECTRICALPARTS
LIST
I1. DIAL CORD
STRINGING
12. ADJUSTMENTS
,. ,.
REGLAGE
AJUSTE.
12
t5
17
19
20
FICINEEFI ELECTFICINIC GCIFIPCIFIATION a I, Mesuno 1 Ljhome, Mesu.o-ku, Tokyo 1::3, Jspen
PICINEEFI ELEC:THONICB IUBAI lNC. 1925 E. oomnguez SE., Long Beach, Cahfo.nra go8lO u.S.A..
PIGINEEFI ELEC?FIC,NlC [EUnclPEI N.V. Keerbenglssn 1, 2740 Beve.en, Eletg,um
PICI|YEEFI ELECTFIEINICB AUBTFIALIA PTY. LTE!. 178-1821 tsounde.v Fosd, Bnaesde, Vrcco. a 3195. a.usc.atr€
YX O DEC.
1982 Printed
in laDan
AM/FM STEREO
RECETVER
Modol Volteg€ R6mrrks
SX-202/KU AC12OVonly U.S.A.model
sx-202/Kc AC120V
only Canadamodel
sx-202/s AC11OV
,12OV,22OV
and240V
{switchable} General export model
sx-202lYP AC240V
only Australia
model
SX-202L/HE AC22OV only European
continentmodel with AM,LW bandruner
sx-202LlHEZ AC220Vonly West Germany model with AM-LW band tuner
o This service
manualisapplicableto the KU types.For servicing
of tlte othertypes,
please
referto the
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

1.SPECIFICATIONS
Amplifier Section
Continuous
Average
Power0utput
is
25
watts*
per
channel,
min.,
at
8
ohms
from
40Hertz
to 20,000Hertz
with
nomore
than
0.3%o
tolalharmonic
distortion.
TotalHarmonicDistortion
(40
Hertz
to 20,000
Hertz,
8ohms,
fromTAPE)
continuous
rated
power
output Nomorethan0.3%
12.5watts
per
channel
power
output
Nomorethan0.15%
NomorethanO.2o/"
Intermodulation
Distortion
(50
Hertz:7,000
Hertz
=
4: 1,
8 ohms,
fror;'rAUX)
continuous
rated
power
output Nomorethan0.3%
Damping
Factor
(1
kHz,8
ohms) 22
Input
(Sensitivity/l
mpedance)
PHONO .....2.5mV/5Okilohms
TAPEPLAY ' 150
mV/50kilohms
PhonoOverload
Level
(T.H.D.0.1%,
1,000H2)
PHONO . . 150mV
Output Level
TAPE REC . 150
mV
SPEAKER .... A,
B,AseriesB.off
FrequencyResponse
PHONO
(RIAA
Equalization)
. 30Hz
to 20,000H2t0'5dB
TAPEPLAY .... l5Hzto50,000Hz+ldB
Tone
Control
BASS
. r9dB (100H2)
TREBLE ... rgdB(10kHz)
Loudnessfrntour (Volum
control
setat-40d8 position)
. . +8dB
(100H2),
+6dB
(10,000H2)
Humand
Noise
(lHF,
shortcircuited,
A network)
PHONOMM.. .....71d8
TAPE
PLAY ...97d8
FM Tuner Section
*UsableSensitivity ...10.7dBf (0.9pV)
50dB
OuietingSensitivity
**MONO ....15.3d8f
(1.6pV)
STEREO .37.6d8f
(21pYl
Signal-to-Noise
Ratio
MONO ....75d8(at85dBf)
STEREO 70dB
(at
85dBf)
Distortion
(at
65dBf)
MONO 1kHz. 'O'3Yo
STEREO
lkHz. .'0.67o
1watt per channel
power
output
CaptureRatio
. ..2.ft8
AlternateChannel
Selectivity
(400kHz) .50dB
StereoSeparation
(lkHz) .35dB
FrequencyResponse . . 30Hzto 15kHz,1! [ oa
SpuriousResponseRatio. ......70d8
lmageResponseRatio ...45d8
lF ResponseRatio. ....100d8
AM SuppressionRatio ...45d8
SubcarrierProductRatio. ......31d8
MutingThreshold .27dBt
(6.3PV)
Antenna
lnput 300
ohmsbalanced,
75
ohms
unbalanced
AM Tuner
Section
Sensitivity
lHF,Loop
antenna 32OtN lm
lHF,Ext,antenna 30pV
Selectivity .....25dB
Signal-to-NoiseRatio ....43d8
lmageResponseRatio ....40d8
lF ResponseRatio. ...'45dB
Antenna AM LooP
Antenna
Miscellaneous
PowerRequirements . ,
AC120V,
60Hz
Power
Consumption
. . . 125
Watts(UL),
150VA(CSA)
Dimensions . . . . 420(W)x98(Hl x214(D)mm
16-9/16(W)
X 3-718(H) X 8-7116(D)
in
Weight
(without
package) . . . 4.3kg(9lb 8oz)
Furnished
Parts
FMT-typeAntenna .....1
AM LoopAntenna 1
Operating
Instructions 1
*Measured pursuant to the Federal Trade Commission's Trade
Regulationrule on Povnr Output Claims
for Amplifier.
*'FM muting functions with this unit whenthe signals
are weak.
The unit's internal wiresare therefore treated sothat the signals
aranot muted when the sensitiviry ismeasured.
NOTE:
Specificationsand designsubiect
to possible
modification without
notice,
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

2.
FRONT
PANEL
FACILITIES
O PowER
swtrcH
Push
this to s1^ritchon andoff the unit's power.
Power
is
suppliedat the depresed
( - ) switch
position
(ON)
and
turned
off atthe
released
(I) position (OFF).
@ HEADPHoNE
JAcK
Connectthe plug on the stereoheadphones
to thisjack
whenlistening
to soundthroughheadphones.
@ ToNE
coNTRoLs
BASS : The bassisincreased
when
this
control
isrotated
clockwisefrom the center
position
andreduced
whenrotated
counterclockwise.
TREBLE :
The treble is increasedwhen this control is
rotatd clockwise from the center
position
and
reduced
whenrotated
counterclockwise.
@ BALANcEcoNTRoL
This is normally kept at its centerposition. lt is rotated
whenthe volume
of sounddelivered
through
the left and
right
channels
of thespeakers
or headphones
differs.
The right channelvolumeis reduced
when the control is
rotatd toward the LEFT from the centerpositionwhile
the left channelvolume is reduced
when it is rotated
toward
theRIGHT.
O FuNcrtoN
swtrcHEs
PHONO : Press
whenlistening
to records.
FM :Press
whenlistening
to FM broadcasts.
AM :Press
whenlistening
to AM broadcasts.
@ TAPE
(ADPT)
SWITcH
This isdepresed
whenusing
a tape
deckor adaptorunit
connected
to therear
panel
TAPE/ADAPTOR
jacks.
@ LOUDNESS
SWITcH
Depress
this switchto the ON position
when listening
to
soundat a low levelof volume.
Thiswill enhancethe bass
and treble and givemore life to the soundevenat a low
volume.
@ voLUME
coNTRoL
Use this to adjustthe volume of the sounddelivered
through
the
speakers
orheadphones.
The volume is increased
when this control is rotated
clockwise
from
theminimum
"0" position.
@ TUNING
INDIcAToR
(TUNING)
Thislights
upto indicate
that anFM,AM stationhas
been
tuned
in.
@ srEREotNDtcAToR
(srEREo)
This lights
up automatically
when an FM stationbroad-
castingin stereohas
been
tunedin.
@ SPEAKERS
swrrcHEs
These
are used
to selectthe speakers
throughwhich you
willlisten
tothe
sound.
Theselected
speakersarenowworking.
A: The sound is heardfrom the speakers
connected
to
thespeaker
A terminals
ontherear
panel.
B: The sound is heardfrom the speakers
connected
to
the
speaker
Bterminalson
therear
panel.
No sound
will be
heard
when
SPEAKERS
A and Bswitches
areboth released.
This isthe position
atwhich thesound
canbeheard
throughthe headphones.
NOTE:
No sund will be heard through the geakers when both the A
and B switches are depressed if only one et of speakerc has
been
connected to either the A or B SPEAKERS terminals.
@ FREoUENcY scALE
This indicates
the frequency
of the broadcasting
station
(FM,
AM).
Thetop levelfigures
(88
- 108)indicate
theFMband.
Thebottom level
figures
(55
- 1601indicate
the
AM band.
@ TUNTNG
KNoB
Rotate
this
knobto pick
up
stations
(FM,
AM).
@ PowER
tNDtcAToR/DtAL
potNTER
r6"
L;N
t';K
t;K -IFUNCTION
l-*'-'
LFI-EI-E
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
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3.PARTS LOCATION
FrontPanel
View
Speaker knob
AAD608
Front oanelassemblv
ANM-292
AAD€O5
Phone
jack
AKN{45
NOruSr
. Parts uithout part number connot be supplied.
o ?he I morh found on some component ports indicotes the impottonce of the
sofety foctor of the port- Therefore, uhen replacing, be sure to use
parts of identicol
desEnation.
. For your Ports Stoch Control, the fost mouing items dre indicdted uith the morhs
t* ond *.
,* CENERALLY MOWS FASTER THAN '.
This classificotion shall be odjusted by each distributor becduseit depende on model
number, temperoture, humidity, etc.
Bonnet
ANE4I O
Tuning knob
AAA{84
Knob B
(BASS,
TREBLE,
BALANCE}
AAB-317
RearPanelView
Earth
terminal
Complexterminal
AKX-073
TopView
A ** Fuse
(T1.6A)
AEK-121
A * Power
transformer
1120v)
ATT.942
e-- KnobAlvoLuME)
AAB.3'I6
Function knob A
{TAPE, LOUDNESS)
AAD6O6
Function knob B
{PHONO,
FM,
AM)
AAD€O7
AC socket
AKP-O39
Rear
panel
ADG-073
Switchassembly
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

4.
BLOCK
DIAGRAM
FRONT
END (1/3)
t-
| 3OOO
FM BAL
I
| 75o
L-UNBAL
l- GND
AM
I LooP
L ANT
l- ernv
Lch REC
i-rroro
l-enor.ro
I
Rch REC
L PLAY
FM
I
STEREO
Q6
LED DRIVER FM MUTE
FM IF AMP
+82
(
13.4V
D7
Q4
AM FRONT
END
trsomvl ^:
EqUALIZERAMP
sr-4
TAPE
(t/21
sr-5
LOUDNESS
+q2 -(v4l
lz.smvl
a5[, lt5omvl. _
I
fT",
(3l4.,4/41
(2/21
ON - OFF
ON - OFF
TONECONTROL
vR2-2,2-3
s2-2
SP.B
(t/2't
lr4.
rv
I PHONES
TO
Rch
S
PEAKERS
srol 1,,
,
1,,
^
;o\--<r5
acr2ov | \,,
6OHz I o{ll
qail
I r"
Sl-l: FUNCTION
(PHONO)
SI.2: FUNCTION
(FM)
sr-3: FUt{cTroN
(aM}
SI.4 : TAPE MONITOR
SI-5 : LOUDNESS
ON - OFF
ON
- OFF
ON - OFF
ON - OFF
ON
- OFF S2-I : SPEAKERS
S2-2: SPEAKERSA
I
au9 L
sr-s LJ
(4/41
FM
IFIDET MPX
rdLF TOR
IN
SMETER
DETECTOR
vco
DET.
OUT- p 691
SlG. L OUT
IN
D6 TUNING --* ar,I
':*" I
1,"=rd;Tt--17 G:405dB
POWER
AMP
sr-4 sr-5
(
2/2't ( 2/2
|
+82 AM
D4
POWER
ON/OFF MUTING
POWERSUPPLY 8 PROTECTOR
SIOI : POWER ON - OFF
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

5.
CIRCUIT
DESCRIPTIONS
FM FrontEnd
A unitized variable capacitor type front end
unit is used consisting of an FET RF singlestage
amp, Iocal oscillator/mixer IC and €rnIF trans-
former.
FM lF Amp, Detector
andMPX Circuit
A 2-transistor IF amp with ceramic filter is used
and the next stage
hasan IC (M51533L) contain-
ing the FM IF detector and MPX circuit. The block
diagramof IC M51533L is shown in Fig. 5-1.This
IC uses a peak detection method which can be
adjusted with a single coil. The PLL method is
employed to reconstitute the 38kHz sub-carrier
for the MPX circuit.
The IF signalis input at pin 1 and the detection
output is obtained from pin 5. The detection out-
put passes
through the muting Q4, goesto pin 9,
passesthrough the MPX circuit and the stereo
signals are obtained from pins 11 and L2. In
addition, this unit detects the presence
or absence
TL OUT ROUT
of a pilot signal to automatically switch between
stereo and mono reception by R14 which is con-
nected to pin 14. When a stereo signal is received,
pin 13 drops to the low level to light the stereo
indicator. When pin 2 is grounded, the PLL VCO
andFM IF operationstop (for AM).
FM Muting
andLED Driver
With this unit, muting is automatically activated
when the antenna input drops below 10pV. As the
antenna input decreases,the voltage at pin 3
drops, Q5 is turned off and Q6 is turned on. As a
result, the gate voltage of Q4 drops, Q4 is turned
off and the detector output circuit is blocked
(Fig. 5-1). When an FM or AM station is tuned
in, the base
potential of Qb is raised,Q5 is turned
on and the tuning indicator lights.
M5r
533L
REGULATOR
LEVEL
METER
CIRCUIT
INPUT
BUFFER
S
TER
EO
SW
ITC
H
AM
s
t-3
Fig.
5-1 FM lF, DetectorandMPXcircuit
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

AM Tuner
This uses a variable capacitor type tuning
circuit composed of three transistors, a 2-tran-
sistor front end and a single transistor AM IF
detector.
AF Section
The equalizer circuit has a low-noise operation
amp(2 channel)
M5218P.
The power amp hasa 25 watt output power IC
STK4141-2S
(See
Fig.5-a).
The tone control circuit isplacedin the negative
feedbackloop of the power amp.
Protective
Circuits
This unit has a circuit to detect DC voltagesat
the power amp outputs and a muting circuit that
operates
when power is turned on and off.
Fig. 5-2 shows the construction of the DC
voltage protection circuit. When a DC voltage
appears at the power amp output, either Q13
(plus) or Q14 (minus) is activated depending on
the polarity of the DC voltage and a trigger is
applied to D15. This turns on Dl5, +B1 isshorted,
the fuse on the primary side is cut and the power
supply circuit is shut off.
Fig. 5-3 shows the power on/off muting circuit.
Time constant t1 is longer than t2 so that imme-
diately after the power is turned on, the emitter
potential of Q15 exceeds
its base
potential, QL5 is
turned on to activate Q16 and Q17 and ground the
signal. A few secondslater, the basepotential of
Q15 risesto turn off Q15 along
with Q16 andQ17.
When the power is turned off, the charge of
C161 passes through D18; it is almost completely
discharged in an instant to make the base
potential
of Q15 zero.However,because
the chargeof C160
remains, Q15 is turned on and muting is activated
in the samemanner as when power is turned on.
TO
SPEAKER
swrTcHEs
Fig.5-2 DC Voltage
protection
circuit
POWERAMP
( Lch
)
MAI
N
VOLUME
BALANCE
VOLUME
--:-----J
! Dt7 Dr6 RtSl
;-:'- - J
itz
Fig.
5-3 Power
ON/OFFmuting
circuit
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TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

I
lNl(+)L
zl
tNt
(-)
r8
tN
2(+)
t7
lN2(-)
Ifi
tl
tl
L__t
t5 16
GN
3
GND 5689rO13t44 MUTING Vee OUT I OUT
2 Vee
Fig.
54 Equivalent
circuit
of power
lC
Mark No. Part No.
1. AHA-335
2. ARB-525
3. AT8-076
4. ADH-Oos
5. AHE-l02
6.
PACKING
Description
Sidepad
Operating
instructions
(English)
Loop antennaassembly
T-type antenna
Packingcase
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

7.EXPLODED
VIEW
AND PARTS
LIST
NOTES;
o Partswithout part number cannot besupplied.
o The I marh found on some component parts indicates the importance of the
safety foctor of thepart. Therefore, when replacing, be sure to useparts
of identical
designation.
o For your Ports Stoch Control, the fast mouing items are indicated with the marks
t* ond i.
rT GENERALLY MOTTES
FASTER THAN *.
This classification shallbe adjusted by eachdistributor because
it dependson model
number, temperature, humidity, etc.
Description No. Part No.
A
A
No. Part No. Descriptions
Speaker
switch assembly
Switch holder
Pullyassembly
LED assembly
Earth
Mounting plate
Pullyassembly
Pullyassembly
Pully holder
Headphone
jackassembly
Chassis
Bottom Plate
Binder
Earth terminal
Rearpanel
Tuningdrum
Smoother
Pointer
holder
Pointer assembly
Heat
sink
1. ANE410
2. BBZ30P080FZK
3. ATT-942
4. PMZ30P060FMC
5. AAD€O8
6. VMZ30P060FMC
7. NKgOFUC
L AAB-317
9. NKTOFUC
10. AAA-O84
11. AAB-316
12. ANM-292
13. AAD€O7
14. AAD€06
15. ASG-541
16. AAD€Os
17. AEC-784
18. AXA-373
19. AEC471
20. MTZ3oP100FZK
21. AEK-121
22. AKP{39
23. ADG{73
24. GWM-267
25. AKN-045
26. SUJSLYXSF
27. ACG-O17
28. BBT3OPOSOFZK
Bonnet
Screw (3 x 8l
Power transformer (1
20V)
Screw (3 x 6)
Speaker knob
Screw(3x6)
Nut
Knob B (BASS,
TREBLE,
BALANCE}
Nut
Tuning knob
Knob
A (VOLUME)
Front panel
assembly
Function knob B (PHONO
FM,
AM)
Function knob A (TAPE,
LOUDNESS)
Push
switch (POWEF)
Power knob
Cabinet bumper
Tuning shaft
Nylon rivet
Screw (3 x 1O)
Fuse
(T 1.6,4)
AC socket
AC power cord
Complex assembly
Phone
Jack(PHONES)
Speakerswitch
Ceramic
{0.01)
Screw (3 x 8l
50.
51.
52.
53.
54.
55.
56.
57.
58.
59.
60.
61.
62.
63.
64.
65.
66.
67.
68.
69.
70.
B
A**
i*
Wireholder
A**
A
A
A
D
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Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
http://www.xiaoyu163.com
http://www.xiaoyu163.com

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w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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4
@
?'20 A
B
C
D
6
V.
I
hs
s"-<))|\
\is-j=
^'/ -S=),)i
q, Ks)
I
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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E1
8.
P.C. BOARDS CONNECTION
ExternalAppearancesof TransistorsandlC's
3
2I
DIAGRAM
2SC1923 COMPLEX
Q3 A2
Ass'y GWM
- 267
2SC
461
B
'":":f'+irvp€N.
-S:"-
2SA1115
2sc26lt3 a\r,, , ML
"'M,
illill
.ll!jil"
sTK4141-2S
M521aP
NJIT44558D
C
'.',-.
det
xIt
tt
Jtll
@d
3
2I
M51533
L
LED Ass'y
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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I
6
5
4
Q7
q9 q0 Qro ot6
ofi qt7
32-O2l
65
4
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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II
87
HEADPHOT\E
JACK Ass'y
B
SWITCH€O
UNSWITCHEO
roowMAx. toow MAx.
c
D
POINTER
Ass'y
I
l7
lt II
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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3
2
9.
SCHEMATICDIAGRAM
, .oo^Io,
FMI
Lzsn uraaL
L
n"o
A ","o
A
lil,", ot,, FMlF aMP
BLED
ol5-17 cr60 _.-_.-
POW€R il/OFF 22olo eI' u'b F€r
Ithv'l
,1".
"to"
L "."
ffi
l'",
t-*;
f---
- REC
l
Dcr45,r46 ACH-249
vR
3 RHAAAV5502
Qr,2,7,9
o4
o5,6,13,16,r7
oa
ot2
Qt4.
|5
2SC461
25K246
JCSd
2SA992
2S0aao
J4101
or,3
o2
D4
oa
D9
011
rN4t48 O12 iN4148
wz- o75 0r3,r4 roE 2FO
2-1K261 0r5 8CR6AM-4
KZL14O Dt6 SZ-O2?
RB4O2 D17,18
tN4148
wz-i30
cr57
! *cr4o I
"""
r "I',2, r,'' , Lct25 4Rr45
'+ Tzzo lrok
J:i | "' 47'
;F --c!-r
rook I
crr4 .';
a:-
3
2
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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6
5
4
A
I
ot3,r4
PR
OTECTOR
9! - OFF
oN - gfr
ON - OFF
-
-
-
a3
FM
IFIOET
A MPX
NOTE:
The indicated semiconductors are representatiue ones
only. Other alternatiue semiconductors may be used
and
are listed in the parts list.
L RESTSTORS.
Indietd in o, %W, 7.W,i5% tolerance unl6s otheMis notd k; k!)
M; Ma, lF); !1%, lcl: !2%, (K),110%, (Ml; i20% tolerance
2, CAPACITORS:
Indicaid in capachy kF)/voltage (V) unle$ otheBis notd
p; pF. ldiBtion whhdt voltage is50V except etftt.otytic capaci
3. VOLTAGE
E; Sienat
voltase
at ( 25 W+ 25 W,8a)outplt {1kHz)
Fli DC voltase (V) at no j.put sisnal
- Valuein{ ) bDCvoltageatratdporer.
4. OTHERSi
+ ,Signal route.
_ A i^Adiusting po,nt.
Ire /n matk roundor toFe componenl pans indic.rs the in
podanc-e
of rhe salety lactor of the pdn. lh.relore, whcn repttrrng,
be ere to u* pafts of identical designarion.
X markd capeitoB and rsistoE h&e psds numbe6.
This is the basic $hmatic diagram, but the etual circut may
vary due to improvemenb in d€sisn.
LEo A3rr
y
!--"-;-;-t
I 06 aEL-40? :
I 06!
!*
:0.
L--:"* -J
POINTER A3s'y
SITCHES:
COMPLEX A.sry
Sl-t : FUNCTION
(PHONO)
sr-2 FUNCTION
(FM)
sl-3 | FUNCTION
(AM)
SI 4 TAPE MONITOR
51
- 5 LOUONESS
52_1 SPEAKERS (
A)
52.2: SPEAKERS
{8)
OUTSIDE OF PC BOARO
SlOl : POWER
*-1
I
B
oN - gfI
9! - oFF
oN - 9!r
oN- 9[
ON _ OFF
"*.;'-l
HEAOPHONEJACK A33'y
The undedind indi@tes the switch Dosition.
sror
a
COMPLEXAsBry (3,/3)
: FurorAEK-r?r I
A r,o, ort-".,
---------1, A
swrrdEo uNswrTdED =-^.,
roow MAr roow Md -;fi,'
-___J
ARrsT
ro
qr48
E2FO
-o27
414
8I 52 SUJeLYXSF
L__
I
5
4l--
6
J'
I i":
T_T
?l
-2e
r
o3*'ut*
LEO
cr8; t--
reooo
I et {"at
r5k
/25
--1
F
I---
SWITCH
A3.'y
16
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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1O.
ELECTRICAL
PARTS
LIST
NO?ES;
o ll/hen ordering resicfors,first conuert resistance
wlues into cod,e
form asshown in
thefollowing examples.
Ex. 1 vthen there are 2 effectiue digits (any digit apart from 0), suchas s60 ohm
and47h ohm (tolerance
is shownby J = iVo,andK - lOVo).
560a 56 x 10t 561 . .
47ha 47x lO3 473 . .
0.5{t 0R5..
RD%PS
E|6tflr
RD%PS
@AgJ
RN2H
oBEr
t(} 010.. asrPotloK
Ex. 2 When there are 3 effective digits (such as in high precision metal film resis-
tors).
5.62ha 562 x loo 5621. . . . RN%SA EGiltrDF
o The b, marh found on some component parts indicates theimportance of the
safety factor of the part. Therefore, when replacing, be sure to tlr,e parts of identical
deeignation
o For your Parts Stoch Control, the fast mouing items are indicated with the marhs
** ond *.
** GENERALLY MOVES FASTER THAN *.
This classificotion shall be adjusted by each distributor because it depends on model
number , temperuture, humidity, etc.
Miscellaneous
Parts
List
P.C.
BOARDASSEMBLIES
lVlark Part
No. Symbol& Dccription
CEA101M
35L
CEA
221M1OL
CEA471M
6L
CEANL
2R2M
50
coMA122K50
coMA562K50
coMA
153K
50
coMA333K50
caMA242J50
coMA 822J50
coMLA124K
50
cosA 182J50
cosA511J50
ccDUJ
050c50
ccDsL270J50
ccDsL121J50
ccDSL101J
50
ccDsL22'tJ50
ccDcH150J
50
ccocH220J50
CKDYF
103250
CKDYF223250
CKDYX
47PM25
CKDYB
222K50
ACG{19
cl50
cl47,Cl60
cl43
cl01,
cl02
cl31,Cl32
cl5,Cl33,
Cl34
cl9,C20
c127,C128
cl07,cl08
c109,cl10
cl29,Cl30
cl8
c34
c7
c125.C126
c30
c113,Cl14,Cl17,C118
cl03,cl04
c2-c5, c23, C29,
C32,C40,C42
c6, c8, cl3, C43,Cl15,Cl16,
c144,c152,Cl56,C157
c39, C141
, C142
c41
C148
ceramic
(0.01/1
50Vl
Mark Part No. Symbol & Deccription
GWM.267
OTHERS
Mark Part
No.
Complex
assembly
Headphone
jack
assembly
LED
assembly
Pointer
assembly
Switchassembly
Symbol& DGcription
A
A
A
A
A
A
Complex
Assembly
(GWM-267)
CAPACITORS
Mark Part
No.
Porapr
transformer('1
20Vl
Push
switch
(POWER)
Ceramic
(0.01/ACl25V)
Fuse
{Tl.64}
AC powercord
ACsocket
Symbol& Description
* ATT-942
** ASG-541
ACGOl7
** AEK-121
ADGO73
AKP.O39
T101
s101
c501
FU1
01
c24
c36
ACH-249
CEA
1O1M
sOL
CEA
R22M
sOL
CEA
ORlM
sOL
CEA
R47M
sOL
CEA
OlOMsOL
CEAlOOM
sOL
CEA22OM25L
CEA47OM
1OL
CEA
47OM
25L
CEA
101M
25L
C1
45,
C146 Electrolytic
(3300/42V)
cl 39
cI1,C21,C22
c't2
cl0
c14, C17,C27,
C111,
c123,
C124
c16, C28, C31, C38,
cl20, c138,Cl54,
Cl55,
c33,C121
,C122
c26,Cl05,C1
06
c135,
C136,
Cl37,Cl51,
c9,c37,
Cl40
c112,
cl19,
cl61
cl53
17
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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RESISTORS
Note: When ordering resistors, conuert the resistance ualue
into code form, and then rewrite the part no, as before.
PartNo. Symbol & Description
COILS
AND TRANSFORMERS
Mark PartNo. Symbol& Description
*
*
*
ACT-162
ACT€02
RHBSAVSSO2
ACN-131
ACN-140
RD'4PMFL
trOtr
RD/.PM
ootr
RDl/8PM
otrE
J
VRl Volume
(260k1
VR2 Volume
assembly
(100kx2,
1M)
VR3 Semi-fixed
(5k)
Rl66 Wire-wound
lO.22x2,Vt'll
R187 Carboncomposition
Q.2M,1l2wl
Rl2,R155-R159,
Rl73
R3E,R36,
Brls, 8116,Rl47-R154,
OTHERS
R1
60-R165,R167. 8
168,
R172.P.17
4,
ATH{53
ATH.O58
ATEO58
ATB{85
ATBO84
ATFO83
ATFO84
Part No.
L1
, L2 AF chokecoil
L3 Micro inductor
Tl FM detector transformer
T2 AM antennacoil
T3 AM oscillatorcoil
F1, F2 FM ceramicf
ilter
F3 AM ceramic filter
Symbol & Description
A
A
1\
SEMICONDUCTORS
IMark Part No.
Rl75,
Rl80
Otherresistors
Symbol& Description
** ASG412
AWBO44
AKX{73
AEC-940
PBZ30ZP060FMC
ABA.271
Headphone
Jack
Assembly
Mark Part No.
51 Push switch
(FUNCTION,
TAPE,
LOUDNESS)
FMFront+nd
Complex
terminal
Bivet
Screw
(3x 6)
Screw
Symbol & Description
**
**
**
**
A**
a**
*
25C461
(25C19231
sTK4141-2S
M51533L-B
M5218P
(NJM4558DX}
25K246
(25K34l
2SD880
(2SD3131
2S4992
{2SA7265)
JC501
(2sc2603)
JA101
(2SA1115)
1
N4148
(us1035)
(1520761
(1Sl
555)
RB4O2
1OE2FD
BCR6AM4
2-1K261
KZL140
s2427
wz-l30
(MZ-1301
w2475
(MZO75l
01,02,07,
09
ol 1
o3
010
o4
012
o8
05,06,013,
016.017
014,
Ol5
D1,
D3,D12,D17,
D18
D9
Dl3,
Dl4
D15
D4
D8
Dl6
Dl1
D2
AKN{45
RD'/4PM
trtrtrJ
LED
Assembly
Mark Part No.
Phone
jack
(PHONES)
R176-R179
Symbol& Deecription
* AEL4O6
* AEL-407
Pointer
Assembly
Mark Part No.
D5 (Red
STEREOI
D6 (Green TUNING)
Symbol& Description
A*
A*
A*
*
*
*
*
* AEL4Os
AAF-I
18
Switch
Assembly
Mark Part No.
D7 (Red)
Pointer
Symbol& Description
1A
** SUJSLYXSF 52 Push
switch
(SPEAKERS)
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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11.DIALCORD
STRINGING
1. Removethe bonnet.
2. Remove the tuning drum
tuning capacitor.
3. fie one end of the cord
insidethe tuning dmm.
4. Rotate the tuning capacitor right around until
the rotor blades
arefully intermeshed.
5. Securethe tuning drum back onto the tuning
capacitor shaft, making sure that the securing
screwB facesdirectly upward.
6. Pass
the cord out through the small opening in
the circumference of the tuning drum (see
diagram), and then take it over pulleys C and D
in that sequence.
7. Wind the cord around the tuning shaft 3 times.
8. Pass
it over pulley E, wind it around the tuning
dmm 1 time, and finally tie it to the spring
hook F sothat it is tensioned.
9. Tum the tuning shaft, ild check that the cord
moves
smoothly.
10. Cut off any excess cord.
11. Turn the tuning shaft counter-clockwise
asfar asit will go.
12. Align the dial pointer with the starting point
of the dial scale, and then pass
the cord over
it.
13. Check that the dial pointer is in line with the
starting point of the dial scale.
14. Finally apply the locking paint to the cord
securing positions (stud A and spring hook F)
and the dial pointer connection.
Starting point
I
I t-T-t-l
rg II
Dialpointer
from the shaft of the
to the stud A located
E nvr
Tuningdrum
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
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12.
ADJUSTMENTS
FM TunerSection
o Checkthat the dial pointer indicatesa starting point.
o Connect the SIGNAL meter between terminal no. 1 of complex assembly
and the ground.
o In principle, no adjustment should be made on FM tracking. (See
page
2I, if.
necessary.)
. Setthe FM switch to ON and connect terminal no. 6 to the ground.
NOTE:
Connect the MPX SG fo the FM SG external modulator
deuiation, Pilot (19hHz) +7.5hHz deuiation. terminal and set the modulation of Main (lkHz, L+R) t67.5kHz
(TC1) TC7 TC6 T6 TCs
\T2
@/
(r4)----_@6
,/ _ TC4 TC3
(rc2) @trst
S
uoFT3
\___
No.1
-.-No.4
@vns
No.6-1_!
Y
T1
Adjustment points in brachets
for SX-202L (Low Waue)
only.
Step FM SG
(400H2, t75kHz deviation) Position of
dial pointer Adjustment
point Adjustment procoduro
Frequency Level
198MHz 66dB 98MHz T1 set theoutput of the REc ouT terminal
to the
maximum
value.
2. 98MHz 46dB 98MHz T6 Setthe
SIGNAL meter
to the maximum
value.
3. 98MHz 66dB 98MHz T1 Adjust the output of the REC OUT terminal distortion to
theminimum level.
4. Disconnect
terminalno. 6 from the ground.
5. 98MHz I OOOB
Notmodulated 98MHz VR3 Set the signal of the terminal no.4 to 76kHz lt2OOHzl.
6. 98MHz I
* Stereom 66dB
odulation 98MHz
T6
(within
r90")Minimize the distortion of the REC OUT terminal
signal.
Fig.
11-1 Adjustment
points
w w w . x i a o y u 1 6 3 . c o m
Q Q
3
7
6 3
1 5 1 5
0 9 9
2
8 9
4 2
9 8
T E L 1 3 9 4 2 2 9 6 5 1 3 9 9 2 8 9 4 2 9 8 0 5 1 5 1 3 6 7 3
Q Q
TEL [phone] QQ 376315150 892498299 TEL [phone] QQ 376315150 892498299
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