Technics QUARTZ ST-X999L User manual

ORDER NO. AD8903059C8
Service
Manual
Tuner
ST-X999L
Color
CYUARTZ Synthesizer
LW/MW/FM Stereo Tuner
(K)...Black Type
Area
Country
Continental Europe
(EB)
G)
SPECIFICATIONS
(DIN 45 500)
m FM TUNER SECTION
Frequency range 87.50~ 108.00 MHz (0.05 MHz-steps)
Sensitivity 1.5 pV (IHF, usable)
S/N 30 dB 1.3 pV (750 )
S/N 26 dB 1.2 pV ( 75Q )
S/N 20 dB 0.9 pV (750 )
IHF 46 dB stereo quieting sensitivity 28 yV /75Q
Total harmonic distortion
MONO 0.15%
STEREO 0.3%
S/N
MONO 70 dB ( 78 dB,IHF )
STEREO 65 dB (71 dB,IHF )
Frequency response 20 Hz ~ 15 kHz, +0.5 dB ~ -1.5 dB
Alternate channel! selectivity
+400 kHz 65 dB
Capture ratio 1.0 dB
Image rejection at 98 MHz 46 dB
IF rejection at 98 MHz 70 dB
Spurious response rejection at 98 MHz 70 dB
AM suppression 55 dB
Stereo separation
1 kHz 40 dB
10 kHz 30 dB
Carrier leak
19 kHz -30 dB (-35 dB,IHF)
38 kHz -45 dB (-50 dB,IHF)
Channel balance (250 Hz ~ 6,300 Hz) +1.5dB
Limiting point 1.2 Vv
Bandwidth
IF amplifier 180 kHz
FM demodulator 1000 kHz
Antenna terminals 75Q (unbalanced)
w@ AM TUNER SECTION
Frequency range
MW §22 kHz ~ 1611 kHz (9 kHz-steps)
530 kHz ~ 1620 kHz (10 kHz-steps)
LW 155 kHz ~ 353 kHz (9 kHz-steps)
153 kHz ~ 351 kHz (-2 kHz shift)
"Technics
Sensitivity (S/N 20 dB)
MW
LW
Selectivity (+ 9 kHz)
MW (at 999 kHz)
LW (at 254 kHz)
Image rejection
MW (at 999 kHz)
LW (at 254 kHz)
IF rejection
MW (at 999 kHz)
LW (at 254 kHz)
m@ TIMER SECTION
Clock
Precision
Functions
Programmable content
Setting intervals
Priority order
@ GENERAL
Output voltage
Power consumption
Power supply
For Great Britain
For continental Europe
AC 50 Hz/60 Hz,110V/127V/220V/240V
Dimensions (W x H x D)
For others
Weight
Notes:
Third Region
20 pV,300 pV/m
50 pV
55 dB
55 dB
40 dB
40 dB
60 dB
60 dB
Quarz-lock type
24-hour indication
Within 0 sec.~+ 10 sec.
monthly (at 25°C)
24-hours programmable
weekly (1 setting)
once only (1 setting)
sleep (at 10~60 min. 10-min. intervals)
Program source(FM,MW,LW)
Power ON/OFF setting
Designation of preset station
1 minute ~23 hours,59 minutes
(at 1-min.intervals)
sleep, once, weekly
0.3V (0.6V, IHF)
9W(clock 5W)
AC 50 Hz/60 Hz,240V
AC 50 Hz/60 Hz,220V
360 x 64.5 x 288 mm
(14-3/16” x 2-17/32” x 11-11/32”)
2.1 kg (4.6 Ib.)
Specifications are subject to change without notice.
Weight and dimensions are approximate.
Matsushita Electric Industrial Co., Ltd.
Central P.O. Box 288, Osaka 530-91, Japan

m@ CONTENTS
Page
Page
ACCESSORIES ........... 00 ccc cee eee eee ee eeees 2 CIRCUIT BOARDS AND WIRING CONNECTION
CONNECTIONS .......... 0... c cece cece eee een eneee 2 DIAGRAM ii cise i345 cade Wine Relea naan as 14~16
LOCATION
OF
CONTROLS
............20.
ccc
eee
eeee
3
FUNCTIONS
OF
IC
TERMINALS.................005
17
DISASSEMBLY
INSTRUCTIONS
..................
4,5
DESCRIPTION
OF
FLPANEL
..................0005
18
MEASUREMENTS
AND
ADJUSTMENTS
............
6,7
RESISTORS
AND
CAPACITORS
................
19,
20
BLOCK
DIAGRAM
............
200s
cece
eee
e
ene
e
ees
8,9
REPLACEMENT
PARTS
LIST
................
20~22,
24
SCHEMATIC
DIAGRAM
...............00
0s
eee
10~13
EXPLODED
VIEW
.........
0.
ccc
cec
cece
ca
neces
23,
24
TERMINAL GUIDE OF IC’S, TRANSISTORS AND
DIODES © sooner brcha eh es elses Gere ceeh 14
m@ ACCESSORIES
Stereo
connection
cable
(SUP2269)
...............005
1
©3-core
flat
cable
(SWKTX930E)
...............ce
ee
eae
1
@FMindoorantenna
...........
0.
ccc
ee
cece
eens
1
@Attachment
plug
(SJP9009
for
[EB]
area
only)..........
1
For
[G]
area
only
(SSA269M)
@AC
plug
adaptor
(RUP120ZBS-H
for
[G]
area
only)
......
1
For
others
areas
(SSA270M)
@AC
power
supply
Cord
...........
0.
ccc
eee
cece
eeeas
1
@AM loop antenna (SPB1162T) ............. 0c cece eee 1 For [EB] area only (SJA193)
@AM antenna holders (SMA233-1M) ...............00- 1 For [EG] area only (RJA0004)
(SMA231M) ..............000008 1 For others areas (SFDACO5E03)
@Screws
(XTB3+10AFZ)
.......
0...
cece
cece
eee
eee
2
@Remote-control
transmitter
(EUR64754)
..............
1
@Batteries (ROS) 2.0... cece cece eee eens 2
m@ CONNECTIONS
AM LOOP ANT
“SWITCHED” outlet:
Audio equipment rated up to 500W can be connected.
Power is controlled by power switch of this unit.
Voltage selector
For (G) area only
CONTROL
aMetiicn OUTPUT
tro
Household AC outlet
+2)
This unit
®
Stereo connection AC power supply cord
cable (included) H AC power supply cord (included)
(Included with amplifier) The configuration of the AC
outlet and AC power supply
3-core flat cable cord differs according to
(included)
area.
Amplifier
(option)
2 00800
QOOOO®
OO

ORDER NO. AD8903059C8-A
CQUARTZ
Synthesizer
LW/MW/FM
Stereo
Tuner
Tuner
m
MESSUNGEN
UND
JUSTIERUNGEN
ST-X999
|.
UKW JUSTIERUNGEN
Einstellungen der Bedienelemente und zu verwendende Gerate.
@ UKW-Messender(UKW-MS)
@ Stereo-Modulator
@ Verzerrungs-Analystator
@ Elektronische Gleichstrom-Voltmeter(EVM)
@ Frequenzzahler
@ Drosselspule(100yH)
@ Widerstand(100kQ)
Anmerkung:
Fir
2202,2251,L321
und
L322
werden
bereits
justierte
Ersatzteile
geliefert.
Die
Kerne
dieser
Teile
daher
nicht
drehen.
UKW-MONO-VERZERRUNGS-JUSTIERUNG
ee
DES
UKW-MESSENDERS
Modulation
1.Der
Testaufbau
ist
in
der
Abbildung
gezeigt.
di
ucneiccaeee
2.Stellen
Sie
die
Einheit
auf
“FM(UKW)”
Betrieb.
Ausgangspegel
3.Die
Radiofrequenzanzeige
und
den
Messender
auf
100.10MHz
einstellen.
4.Den
Kern
von
T201
so
justieren,
daB
die
im
Signalzustand
gemessene
Spannung
OmV
(0+20mV)
im
300mV-Bereich
betragt.
5.7202
so
justieren,
daB
der
Verzerrungsfaktor
des
linken
Kanals
minimal
wird.
6.Schritte
4
und
5 einige
Male
wiederholen.
7.Versichern
Sie
sich,
daB
die
Verzerrungsfaktoren
von
Kanal
L und
Kanal
R
annahernd
gleich
sind
und
auf
ein
Minimum
gehalten
sind.
Anmerkung:
Fur die Justierung ist ein Schraubendreher aus
Kunststoff zu verwenden.
MPX-SGO-JUSTIERUNG
Digitaler Frequenzmesser
1.Der Testaufbau ist in der Abbildung gezeigt. 4
2.Den UKW-Bertriebsart-Wahlshalter in die “on/auto” Po-
sition stellen.
3.Radio und MeBsender auf 100.10MHz einstellen.
4.VR301 auf 19kHz + 30Hz auf der
Frequenzzahleranzeige justieren.
e@ VERWENDUNG EINES ALTERNATIVSYSTEMS
1.Stereosignal vom MeBsender eingeben oder eine
Stereo-Sendung empfangen.
2.VR301 justieren, bis die Stereo-Anzeige aufleuchtet.
Den Arm von VR301 mit Lack sichern, wie in der
**Stereo"’
Abbildung
gezeigt.
5
AUS
ZUSTAND DES UKW-MESSENDERS
Modulation
Modulationsfrequenz
Ausgangspegel,
“Stereo” AUS Stellung
“Stereo” EIN Steliung
(Anzeigebeleuchtung)
Einstetipunkt des
pilotschaltkreis’

ST-X999L
ELNSTELLUNG DER PHASENSPERRUNG EINES
SCHLEIFENVERSCHIUSSES
Digitaler Frequenzmesser
TP901 s
UKW ANT (750) [T3909 (GND)
1.Der Testaufbau ist in der Abbildung gezeigt.
2.Den UKW-Bertriebsart-Wahishalter in die “AM” Position
stellen.
3. Vornehmen Sie ein Kurzschlu8 zwischen TP903 und TP904.
4.Stellen Sie den Radiofrequenzbildschirm auf ”1629kHz”.
5.CT901 auf 524.288kHz+ 10Hz auf der
Frequenzzahleranzeige justieren.
FRANCAIS
m MEAURAGES ET REGLAGES
M.F. REGLAGES
Positionnements des commandes et équipement utilisé
@
Générateur
de
signaux
M.F.(FG-SG)
@
Compteur
de
fréquence
@
Modulateur
stéréophonique
@
Bobine
d’amortissement
d’arrét
(100uH)
@
Analyseur
de
distorsion
@
Résistance
(100KQ)
Nota:
@ Voltmétre électronique a C.C. (EVM).
eléments.
REGLAGE DE DISTORSION MONOPHONIQUE M.-F.
1.Le raccordement de I’équipement d’essai est montré
sur l‘illustration.
2.Régler l’apparei! sur le mode "FM”.
3.Ajuster le réglage de l’affichage de radiofréquence et
du générateur de signaux sur 100.10MHz.
4.Régier le noyau de T201 de telle sorte que !a tension
mesurée sur le mode de signaux soit de OmV (OmV +
20mV) dans une plage de 300mvV.
5.Ajuster T202 de tellie que le facteur de sistorsion du
canal de gauche soit minimisé.
6.Répéter les étapes 4 et 5 quelques fois.
7.S’assurer que les facteurs de distorsion du canal de
gauche et du canal‘de droite soient sensiblement les
mémes et au minimum.
Nota: Le tournevis de réglage utilisé devra étre fait en
résines.
Pour Z202,Z251,L321 et L322 , ajuster les éléments qui sont fournis.
Aussi, ne pas tourner les noyaux de ces
CONDITION DU GENERATEUR DE SIGNAUX M.F.
Moduiation
Fréquenz de modulation....1kHz
Niveau de sortie
Voitmétre
électronique
Générateur de
signaux M.F.
aeyo
ooeneo OUT
ooo oo 9

REGLAGE MULTIPLEX DE L’OSCILLATEUR
COMMANDE PAR VARIATION DE TENSION Génerateur de Compteur de fréquence
signaux M.F.
1.Le raccordement de |’équipement d’essai est montré Ae O
sur la figure. aoue
2.Régier l’appareil sur la position “on/auto”.
3.Régiler fe cadran radio et le générateur de signaux sur
100.10MHz.
4.Ajuster VR301 pour 19kHz + 30Hz sur Je compteur de
lecture de fréquences.
@ EN UTILISANT UN SYSTEME ALTERNATIF
1.Applique un signal stéréo a partir du générateur ou
recevoir une émission stéréo. voseari “Stereo”
2.Ajuster VR301 jusqu’ a ce que I’indicateur stéréo s HORS CIRCUIT HORS CIRCUIT
éeclaire. Collier le bras de VR301 comme il montré sur la
figure.
CONDITION DU GENERATEUR DE SIGNAUX M.-F.
Modulation
:
7
7
Fréquenz
de
modulation...
Position
de
HORS
CIRCUIT
“Stereo”.
Niveas
de-serie
Position
de
MISE
EN
CIRCUIT
“Stereo”.
(Eciairage
de
|indicateur)
Point
de
réglage
du
circuit
pilote.
REGLAGE DE L’HORLOGE EN BOUCLE A BLOCAGE
DE PHASE
Digitaler Frequenzmesser
1.Le raccordement de l’equipement d’essai est montre
sur lta figure.
2.Régler l’appareil sur ja position “AM”.
3.Faire de court-circuit entre TP903 et TP904.
4.Régler l’affichage de radiofréquence sur “1629kHz2”.
5.Ajuster CT901 pour 524.288kHz+10Hz sur le compteur
de lecture de fréquences.
ESPANOL
m@ MEDICIONES Y AJUSTES
FM AJUSTES
Posiciones de control y equipo usado
@ Generador de sefiales de FM(FM-SG) @ Frecuencimetro
@ Moduiador estéreo @ Bobina de choque(100yuH)
@ Analizador de distorsiones @ Resistor(100kQ)
@ Voltimetro electronico de CC(EVM)
Nota: Para 2202, Z251, L321 y L322 , se suministran piezas ajustadas. Por lo tanto, no cambie los nticleos de estas piezas.

AJUSTE DE DISTORSION MONO FM
1.La conexién del equipo de pruebas se muestra en la
figura.
2.Poner la unidad en modalidad de ”FM”.
3.Poner la puesta de la presentacion de radiofrecuencia
y generador de sefales a 100,10MHz.
4.Ajustar el nucieo de T201 de manera que el voltaje
medido en modalidad de sefal sea OmV (0+20mvV).
5.Ajustar T202 de manera que el factor de distorsion de
CH-I se minimice.
6.Repetir los pasos 4 y 5 algunas veces.
7.Asegurarse de que los factores de distorsién de CH-I y
CH-D sean casi los mismos y los minimos.
Nota:
El destornillador de ajuste usado debe estar hecho de
resina.
AJUSTE DE MPX VCO(OSCILADOR CONTROLADO
POR VOLTAJE MPX)
1.La conexién del equipo de pruebas se muestra en la
figura.
2.Poner fa unidad en la posicion de “on/auto”.
3.Poner la presentaciOn de la radio y la puesta del
generador de senales en 100.10MHz.
4.Ajustar VR301 para 19kHz+30Hz en
frecuencimetro.
lectura de
* USANDO SISTEMA ALTERNATIVO
1.Aplicar sefal estereofonica del generador o recibir la
emision estereofdnica.
2.Ajustar VR301 hasta que la presentacon de estéro se
encienda. Fijar el brazo de VR301 como se muestra en
la figura.
CONDICION DE GENERADOR DE SENALES DE FM
Modulacién
Frecuencia de modulacién
Nivel de salida
AJUSTE DEL RELOJ DEL ENLACE DE LA FASE DE
CIERRE(PHASE-LOCKED LOOP)
1.La conexién del equipo de pruebas se muestra en la
figura.
2.Poner la unidad en la posicién de “AM”.
3.Hacer cortocircuito del TP903 y TP904.
4.Ajuste la frecuencia de radio a 1629kHz en la pantalla.
5.Ajustar CT901 para 524.288kH+10Hz en lectura de
frecuencimetro.
CONDICION DE GENERADOR DE SENALES DE FM
Modulacion
Frecuencia de modulaci6n
Nivel de salida
Frecuencimetro
area
“Estéreo"
OFF
Posicién de “estéreo” OFF.
Pésicién de “estéreo” ON.
(indicador encendido)
Punto de ajuste de circuito
piloto.
Digitaier Frequenzmesser
UKW ANT (75Q)
Printed in Japan
F890300850TW/KH

m LOCATION OF CONTROLS
Tuner section
Power “STANDBY ()/ON” switch
(POWER “ON/STANDBY ()”’)
Remote-control signal receptor (SENSOR)
FM mode selector (FM MODE)
Tuning buttons (TUNING)
Band selectors (BAND SELECTOR)
Preset-tuning buttons (1-0)
(28 CHANNEL RANDOM PRESET TUNING)
Memory button (MEMORY)
Timer section
Digital frequency display
Quartz-lock indicator (QUARTZ LOCK)
Memory indicator (MEMO)
Channel display
FM stereo indicator (STEREO)
FM mode indicators
SFeaeees
Aho oe &
[I
ad See
oo 41n
COU. Fl se
[1] Sleep button (SLEEP) [A] Stand-by indicator (STANDBY)
[2] Cancel button (CANCEL) Day display
[3] Stand-by button (STANDBY) [Cc] Timer ON/OFF indicator (ON/OFF)
[4] Read button (READ) [D] Time display
[5] Set button (SET) [E] Colon indicator
[6] Select buttons (SELECT) [F] Timer-mode indicator (ONCE/WEEKLY/SLEEP)
Clock set button (CLOCK SET)
* The operating procedures and features are similar to those for and of the ST-X990L.

ST-X999L
m@ DISASSEMBLY INSTRUCTIONS
@® and remove the holder in the direction of the
arrow @).
ieee
Removal
of
the
main
P.C.B.
Procedure
|
1.
Remove
the
10
screws
(Q~@).
133
ee
No.
|
Removal
of
the
cabinet
Procedure
|
eRemove
the
4
screws
(Q~O).
1
o,
ae
Removal
of
the
front
panel
Procedure
|
1,
Remove
the
flat
cable
(J901,
J902).
152
2.
Push
the
front
panel
in
the
direction
of
the
arrow
3. Remove the 3 secrews (@~@).
4. Remove the front panel in the direction of the arrow.
Removal of the flat cable
Pull out the flat cable
while pressing the
Flat
connector
cable
/
Connector
2. Remove the 3 screws (@~®).
3. Slightly puil the front panel toward you and
remove the main P.C.B.

ST-X999L
Ref.No. | Removal of the preset tuning SW P.C.B.
4 and band/tuning/timer operation SW P.C.B.
Procedure | 1. Remove the 4 screws (@~@). Spection SW PCB.
1-2-4 | 2. Remove the band/tuning/timer operation SW Al
P.C.B.
3. Remove the 1 screw (@).
4. Push the 4 claws and remove the preset tuning
SW P.C.B.
1. Remove the battery cover lid. 3.Insert a screwdriver blade between the
2. Remove the one screw (Q). upper and lower covers inside the battery
: compartment and them slowly loosen the
bottom cover.
Battery cover lid

ST-X999L
m™ MEASUREMENTS AND ADJUSTMENTS
FM ADJUSTMENT
Control positions and equipment used
@ FM signa! generator(FM-SG) @ Frequency counter
@ Stereo modulator @ Choke coil(100yuH)
@ Distortion analyser @ Resistor(100kQ)
@ DC electronic voltmeter(EVM)
Note: For Z202(AM-IFT), Z251(AM ANT and OSC coil), L321 (L.P.F) and L 322(L.P.F), they are supplied as adjusted parts.
So, do not turn the cores of the parts.
FM MONO DISTORTION ADJUSTMENT
FM SIGNAL GENERATOR CONDITION
1.Test equipment connection is shown in figure. Modulation
2.Set the unit to “FM” mode. Modulation frequency
3.Set the radio frequency display and signal generator to Output level
100.10MHz.
4.Adjust the core of T201 so that the voltage measured in
signal moae is OmV(0+20mV) in 300mV range.
5.Adjust T202 so that the distortion factor of L-CH is mini-
mized.
6.Repeat steps 4 and 5.
7.Make sure that the distortion factors of L-CH and R-CH
are nearly the same and minimum.
Note: The adjusting screwdriver used should be made of
resin.
MPX VCO ADJUSTMENT
1.Test equipment connection is shown in figure.
2.Set the unit to “on/auto” position.
3.Set the radio frequency display and signal genarator to Atay oO
100.10MHz.
4.Adjust VR301 for 19kKHz+30Hz on frequency counter
reading.
USING ALTERNATE SYSTEM
1.Receive the stereo broadcast.
2.Adjust VR301 until stereo indicator lights up. Fix the arm
of VR301 as shown in figure.
Frequency counter
FM SIGNAL GENERATOR CONDITION
Modulation
Modulation frequency .
Output level
“Stereo” OFF position
“Stereo” ON position
(Indicator lighting)
Adjust point of pilot
circuit

PLL CLOCK FREQUENCY ADJUSTMENT
Frequency counter
1.Test equipment connection is shown in figure.
2.Set the unit to “AM” position.
3.Short TP903 and TP904. TPs010
4.Set the radio frequency display 1629 kHz. FM ANT (750)
5.Adjust CT901 for 524.288kHz+10Hz on frequency
counter reading.
TP902 (GND)
e ADJUSTMENT POINTS
AMLOOP ANT FMANT 75Q
OUTPUT AM ANT
1
L R AMPLIFIER in |
UAl GU?
ee
Oo
2251
FM offset
1C201 TP202
FM offset (—) adj
FM MONO distortion
FM
offset
(+)
adj
TP201
@)
FM
MPX
VCO
PLL
Clock
(19
kHz
output)
@)
FM
MPX
VCO
10304
(19
kHz)
VR301
PLL
Clock
a
uo
TP904
IC901
FL
m@ BLOCK DIAGRAM
FM MONO DISTORTION adj.
TP202 TP201
9 © T201,202 ‘i AN7273A
det, coil FM/AM IF AMP, DET,
FM
FRONT
END
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CF
202
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amp
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I
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Q254
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Q205
MW/LW
Loop filter Signal
receive
t
X01 (AM) Q207~209 Sateclor
(72MHz) d
QO AM OSC FM/AM 2 =
buffer Power supply a ow
fa) cont
1 2 15 8 14 hh selector 9
_ = — — noi aie |
XOUT Xin PO2 RO2 PO! FM IN ry
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STEREO
MONO
MUTE
‘SD
FM
soc
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|
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kHz
m@ BLOCK DIAGRAM
FM ANT
AM ANT
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FM MONO DISTORTION adj.
TP202 TP201
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9 T201,202 AN7273A (1) AN7470
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det, coil FM/AM IF AMP, DET, EM MEX R314,
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MS0467-O18FP
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ne eee | 01001 | oot | 30
| 4 | Deckplay< | or001_—| corn
| 5 | Volup | roo] 100100 |] 35
| 6 | tuners | or001_—s|otor00.—s]t 6
| 7 | PowerON/oFF | o1001__—'| 100000 | 38
| 11 | CDplaypause | 01100 | oor010._—s|_ 39 Tuner 2 01001
| 12 | Deckplaym> | _—or001_— | corr. | 43_ | CD skip/search |
Vol. Down | 01001 | 10010144 | Deckstop
| 46
| 18
| 20 | | 52
| 53
| 22 | | 55
| 26 |
| 62 |
ae
| ___ Function _| Custom code
01001
Tuner 1
01100
01001
01001
Turntable start 01001
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01001
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01001
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00
| Muting | toons
001101
[Deckh>m> | ovoor_ | 000011
8
~13—
20
| SCHEMATIC DIAG RAM (Parts list on page 19~21)
(This schematic diagram may be modified at any time with the development
of new technology.)
Note 1:
S702 : Voltage selector switch in “240 V" position. Note 2:
(110 V-+=127 V-<=220 V-~<=240 V) as
For (G) area only. ¢ Use of ceramic filtérs in pairs
BAN GH oe The ceramic filters (CF201, CF202) for FM-IF circuit are available in
*®S$901~S910 : Preset tuning switches. Se a ae ;
$901: CH1, $902: CH2, $903: CH3, $904: CHA; hes pallet ey 7 circuit, be sure to use the ceramics of the
$905: CHS, S906: CH6, $907: CH7, S908: CHS, ay pone
$909: CH9, $910: CHO At repairing and replacement, pay close attention to the diodes
. : : (D915, D914) for use as different diodes must be used depending on
pet posh aul each rank of the ceramic filters.
@S915~S921 : Timer operation switches. :
$915: SELECT(A), S916: SELECT(¥) olor MarKING: |
(ser SET, $918: READ, $919: staKboy (Red, Black or White)
$920: CANCEL, $921: SLEEP
eS$922 : FM mode selector switch. 4
©S923,$924 : Tuning switches. SFE RANK | cos | oats | patty
$923:
DOWN,
$924:
UP
10.7MHz
(Color)
FREQUENCY
©$925~S927 : Band selector switches. 10.72 MHz
Se Sn ean coe ee ea
eS928 : Power switch.
¢ Indicated voltage values are the standard values for the unit | Bue =f xk | CO 10.67 MHz
measured by the DC electronic circuit tester (high-impedance) with
the chassis taken as standard. Therefore, there may exist some Note: © mark: Diode is used.
errors in the voltage values, depending on the internal impedance x mark: Diode is not used.
of the DC circuit tester. ( ): AM voltage
° Positive voltage lines wets AP signal lines
coco FM OSC <——>) FM signal * Caution!
=nen>
AM
OSC
mam
AM
signal
IC
and
LSI
are
sensitive
to
static
electricity.
«Important safety notice Secondary trouble can be prevented by taking care during repair.
Components identified by A. mark have special characteristics * Cover the parts boxes made of plastics with aluminum coil.
important for safety. When replacing any of these components, + Ground the soldering iron.
use only manufacturer's specified parts. + Put a conductive mat on the work table.
* Do not touch the legs of IC or LSI with the fingers directly.
m@ TERMINAL GUIDE OF IC’S, TRANSISTORS AND DIODES
2SC2603EFG
2 as
peenos 2SC3940A-Q chirp Gee
2SA933SQR
eeelere 2SD1450RS
25C2786M
28C1675L
2SC1685RST
c
Ze
MA165, MA162A
MA700A
EZ
7
Cathode
Ca o—_}4-—_0 A
ieee MA4051M,
MA4062M,
MA4150M
MA4330L
Gaede MA4043M
cao—fa-—A MA4100M
1SA35200
64 pin
—14—

re available in
mics of the
the diodes
nding on
CENTER
FREQUENCY
10.72 MHz
10.70 MHz
10.67 MHz
‘ing repair.
sm coil.
irectly.
C2603EFG
C1740SQ
A933SQR
D1450RS
=
.4051M,
.4062M,
.4150M
4330L
4043M
4100M
A
1 2 3 4 5 6 7 8
@ CIRCUIT BOARDS AND WIRING CONNECTION DIAGRAM (ears list on pages 19~21)
Power Source For(GJarea.
For (Glarea——=- — — —— 4
| LFM_ANT] ! | eM ANT ARNT | OAM Ge CONTROL pLOUTPUT [ac OUTLET] VOLTAGE ADJ. [ac ouTLeT |
5
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MAIN
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1101277220
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ST-X999L ST-X999L
m DESCRIPTION OF FL PANEL m@ RES!
BATT.3V
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:
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Importa
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ASSIGNMENT
Notes
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STANDBY SUN MON THU
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Example:
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Type
Voltage
m@
FUNCTIONS
OF
IC
TERMINALS
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1C901
(D7519HGF701)
MICRO COMPUTER
:
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CONNECTION
Type Voliage
(S0V)
Eig A Ee
Name
Name
:
:
CONNECTION
’
ro
817
6
:
A
“
Be
a
N
AA
@
Capacity
values
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Digit
output
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FIP
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Resistance
value
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T
High
withstand
voltage
output
terminal
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1K
=
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[o>
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[freee aw Pret mT]
Station
detector
input
SLEEP
_
LEEP
Active Low
Voltage
detector
input
ie
Sa
aa
i
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Active Low
ee Serial data [Seritdataoupt =
FM selective output
FM High...-M
Low...AM
Pr re | so [ewan id
Power failure detection
Active Low P33 HALT mode output
Active High
HALT mode (backup) reset
57 INT1 INT1 | Connected in parallel to P62 power failure detector
terminal
CA FM
$3 $1
a KSO, CE Key soutce outputand CE for serialtranster——_| soutce output and CE for serial transfer
Key source output
Active High
| 58 | veo | voo. | Power terminal (same as pin @)
FM simultaneous SD circuit control output (only
auto tuning and auto scan memory)
Active High
Key return signal input
Active High
KSS Key source output
P43
KSB
Active
High
Non-Connection
jae
EVENT
Connected
to
non-connection
Vss
X2 X2 :
Pee Crystal oscillator 4.19 MHz
ras | ve | ove [ovoienns
eee Power terminal 5 V+10%
Segment output for FIP
High withstand voltage output terminal
FM forced monaural output
High...Forced MONO
Low...AUTO
Measuring terminal for internal system clock to
count
fx
6 fo
Power output
High...ON
Low...OFF
[e [ ree [semaines
TIMER High with timer power ON> HIGH
Low with timer power OFF— LOW
POWER whine
Active High
=17= —18—
Segment output for FIP
High withstand voltage output terminal

ST-X999L ST-X999L
lm RESISTORS AND CAPACITORS
Notes : * Important safety notice :
Components identified by /\ mark have special characteristics important for safety. When replacing any of these components use only
manufacturer’s specified parts.
ECBT1E223ZF . ECEA16V1000 RCBCIHIO1KBY
RCBCIHIOIKBY ECBTIHI02KB5 0: RCBCIHIOIKBY
RCBSIHI81KBY
ECBT1H102KB5
double layer capacitor
*
Bracketed
indications
in
Ref.
No.
columns
specify
the
area.
(Refer
to
the
first
page
for
area.)
RCBS1H3R3KCY
50
ECEAICKS100
ECEA1CU221
Parts
without
these
indications
can
be
used
for all
areas.
RCBS1H3R3KCY
50
ECBT1E103ZF
f
ECEAICKS100
RCBSTH3R3KCY
50
ECEAIHKR47
;
ECKFIHI0GZF
RCBSIHI80JCY
50
ECEAIHK2R2B
2,
ECKFIHI03ZF
Nurnberg
cyan
Eo
heels
;
RCBSIHIBIKBY
50
ECEAICKS100
ECKDOHIG2ZF
TO
Example:
ae
.
:
ae
RCBS1H1RSMCY
50
ECFTDA73KXL
0,
ECKFIHI03ZF
|
ERD
25
F
J
102
‘
Baadice
He
ai
°
cael
ECCD1HO60CC
50
RCBSTHIB0JCY
EECF5R5U473
NO
Type
"Wattage
“Shape
Tolerance
Value
tea
at:
vaW
ESS
NCS
000
st
comer.
Sede
saw)
(1kQ)
:
Carbon
(chip)
:
80:
1/2W
RCBSTHIS0JCY
50
ECKDIH223PF
ECEAIVUS0
ERX
2
AN
J
471
:
Metal
Film
(chip)
:
SA.
SW
RCBSIHISOJCY
50
ECEATHKO10
;
ECKD2H102ZF
Type
Wattage
Shape
Tolerance
Value
ae
:
BG.
EW
RCBSIHISOJCY
50
ECKDIH223PF
ECKF1H103ZF
50
(2W)
(470Q)
singombustible
ECBT1HI02KB5
50
ECEAICUI01
ECEATEUI01
5
EO
Box-Shaped
RCBSIHI8IKBY
50
ECEAIHKRAT
0,
ECKFIHI03ZF
50
;
:
Wire-Wound
ECEAQJUIO!
63
ECEATHKO10
ECEAIVUI01
3S
Numbering
System
For
Capacitors
:
Chip
Resistor
ECKF1H10ZF
50
ECEAIVK3R3
;
ECEA1VU330
6
Example:
:
Chip
Resistor
ECKF1H103ZF
50
ECEATVK3R3
f
ECKWNS103ZVS
250
.
ECKD
1H 102
z
F
ECEA25M4R7R
25
ECEA1VK3R3
i
ECEATHS330
50
Aas
Nae
aa
ee
[sepsis
type
[votes
Troe
ete
soe
sn
ies
a
Type
Voltage
Value
‘Tolerance
—
Unique
ECBT1HI02KB5
50
ECFTDS32KXL
0,
ECKFIHI03ZF
50
(50V)
(0.001
1F)
:
Electrolytic
:6.3V
:
K:
£10%
ECKFIHI03ZF
50
ECFTD473KXL
0,
ECEAICKS100
16
ECEA
50
M
330
:
Ceramic
168
16V
:
M:
£20%
ECKF1H103ZF
50
ECQP1471JZ
ECEA1HKO10 50
oe
eee
pares
Rapa
:
Ceramic
Capacitor
1H
:
SOV
:
2,
ty
ECKF1H103ZF
50
ECKFIHI03ZF
i
ECEAIVK3R3
3
er
Sama
seers
*
aan
:
Polyester
50
:
50V
:
-20
ECKF1HI0GZF
50
ECBTIHIOCKBS
0.
RCBCTHIZOKCY
50
:
Polypropylene
2H
:
500V
:
J:
£5%
ECBT1H102KB5
50
ECBTIHIO2KB5
0,
RCBSIHSREKCY
50
39
:
Ceramic
4:
100V
‘
G:+2%
ECBT1E223ZF
5
ECEAIHKR47
ie
RCBCIHIO1KBY
50
F
es
7
:
Non
Polar
Electrolytic
KC
:
400V
AC
F:
1%
RCBSIHISOJCY
50
ECEAICKS100
RCBCIHIO1KBY
50
p)
@
Capacity
values
are
in
microtarads
(UF)
unless
specified
:
Ceramic
(Chip
Type)
KC
:
125V
AG
C:
£0.25pF
ECEAQJU101
4
ECFTDG32KXL
1
RCBCIHIO1KBY
50
otherwise,
P=
Pico-farads
(pF)
F=Farads
(F).
:
Ceramic
(Chip
Type)
(UL)
D:
£0.5pF
ECEAIEKSR7
4.
ECFTDSQ2KXL
0,
RCBCIHIOIKBY
50
@
Resistance
values
are
in
ohms
(Q),
unless
specified
:
Semiconductor
ECKD1H223PF
;
ECKFIHI06ZF
'
RCBCIHIOIKBY
50
otherwise,
1K
=
1,00002,
1M
=
1,000kQ
:
Liquid
electrolyte
ECKDIH223PF
0,
ECEAICU222
RCBCIHIOIKBY
50
50
50
50
50
[om [oom [oe [orm [om | wm om [om
Vv
ERDS2T UAT! A 1/4 ERDS2T J221
ERSTE ERDS2T J391 V4 R715 ERDS2TJ101 fe 1/4
RO
ERDS2TU470
«47—«W1/4
on
ERDS2TJ103
ie
14
RTI6
ERDS2TJ101
100
1/4
a
REPLACEMENT
PARTS
LIST
R3 ERDS2TJ104 100K. 1/4 we ERDS2TJ472 4.7K 1/4 RTIT ERDS2TJ101 -100—*1/4 Notes : * important safety notice :
R4
ERDS2TJ824.
820K
«1/4
ERDS2TJ103
10K
1/4
R901
ERDS2TJ22200
22K
1/4
Components
identified
b
mark
have
special
characteristics
important
for
safety.
When
r:
ing
any
of
Ea
ee
eee
hee
FES
EACaA
ae
Fe
ae»
Se
Spiel
pis
ae
a
P
p y
eplacing
any
of
these
components
use
only
RE
ERDS2TU272
2.7K
1/4
R253
ERDS2TJ182
«1.8K
1/4
ROOS
ERDS2TJ222
00
2.2K
1/4
*
Bracketed
indications
in
Ref.
No.
columns
specify
the
area.
(Refer
to
the
first
page
for
area.)
RT
ERDS2TJ684
680K_—
(1/4
R254
ERDS2TJ223
00
22K
1/4
R904
ERDS2TJ5620
5.6K
1/4
Parts
without
these
indications
can
be
used
for
all
areas.
R8 ERDS2TJ122 «1.2K 1/4 ie ee ie 1/4 ROIS ERDS2TJ154 150K 1/4 + Remote Control Ass’y:
Rg ERDS2TU274 270K 1/4 ERDS2TJ1 12K 1/4 RON4 ERDS2TJ154 «150K 1/4 , inati
foe
prowl
deh
pan
EADSOT
122
1K
V4
fie
ERDGOT
JIEA
150K
14
Supply
period
for
three
years
from
termination
of
production.
R102 ERDS2TJ103 10K 1/4 R261 ERDS2T 102 1K 1/4 R916 ERDS2T J154 150K 1/
R104
ERDS2TJ102
Ko
R262
ERDS2T
J332
3.3K
1/
R920
ERDS2TJ1038
10K
1/4
R105
ERDS2TU561
560
1/4
R263
ERDS2T
J153
15K
1/4
R921
ERDS2T
J333
BK
1/4
R106
ERDS2TU562
«5.6K.
1/4
R264
ERDS2TJ102«1K_~—o1/4
R922
ERDS2TJ103.
«10K_—s«1/4
INTEGRATED
CIRCUITS:
2SCIBESRST
==
TRANSISTOR
R107 ERDS2TJ103 10K 1/4 R301 ERDS2TU393. BOK d/4 R923 ERDS2T J562 5.6K 1/4 LM7001 1.C, PLL FREQUENCY 28C1740SQ TRANS! STOR
R108
ERDS2TU391
380._—s*1/4
R302
ERDS2TJ1§1
150
1/4
R924
ERDS2TJ563.
SEK
1/4
ANT273B
1.C,
FM/AM
|
F
AMP
280174080
TRANS
|
STOR
R201 ERDS2TJ102 1K 1/4 R303 ERDS2T J223 22K 1/4 R927 ERDS2T J563 SEK 1/4 SVIUPC1161C3 —1.C, FM MPX 2S8C2787L TRANS! STOR
R202
ERDS2TJ824
=
B20K_s1/4
R304
ERDS2TJ223.
22K
O1/4
RSG2
ERDS2TJ562.
5.6K
1/4
D7519HGF701
1.C..M1CRO
COMPUTER
280174080
TRANS
|
STOR
R203
ERDS2TJ122.
«1.2K
«1/4
R305
ERDS2TJ272
2.7K
1/4
R9BB
ERDS2TJ562
5.6K
1/4
TRANSISTORS
2SAS33SQR
TRANS!
STOR
R204
ERDS2TJ@24
BAK
o/4
R306
ERDS2TJ272
2.7K
1/4
R934
ERDS2TUS62
«5.6K
1/4
TRANSISTOR
2SC1740SQ
TRANSISTOR
R205
ERDS2T
391
300
(1/4
sah
sinteliaed
5.6K
1/4
R935
ERDS2T
J562
5.6K
1/4
TRANSISTOR
R206
ERDS2TJ561
560
(1/4
ERDS2TJ562
5.6K
1/4
RS36
ERDS2TJ562
«5.6K
1/4
-
iS
R207
ERDS2T
ug22
82K
1/4
R309
ERDS2T
J224
220K
1/4
R937
ERDS2T
J562
5.6K
1/:
pea
etate
Leet
pamela
Wiee
R208
ERDS2TJ102
1K
1/4
R311
ERDS2T
J102
IK
1/4
RS38
ERDS2T
J563
SOK
1/4
2SC2603EFG
TRANSISTOR
SVC211SPA-AL
VARICAP
R209
ERDS2TJ471
410
1/4
R312
ERDS2T
J153
15K
1/4
R941
ERDS2T
J331
330
1/4
2SC2S03EFG
TRANSISTOR
MAI65
DIODE
R210
ERDS2T
u332
3.3K
1/4
R313
ERDS2TJ473
41K
1/4
R942
ERDS2TJ104
100K
1/
2S
C2787
TRANSISTOR
MAI6S
DIODE
R211
ERDS2T
U222
22K
1/4
R314
ERDS2T
J473
41K
1/4
R943
ERDS2T
J122
12K
1/4
OSCITBTL
TRANSISTOR
MA165
DIODE
R212
ERDS2T
153
15K
1/4
R315
ERDS2T
J103
10K
1/4
R944
ERDS2T
J824
820K
1/4
2S¢1740SQ
TRANSISTOR
SVD1SR35200A
DIODE
R213
ERDS2TJ104
100K
1/4
R316
ERDS2TJ102
KK
V/4
R945
ERDS2T
J474
410K
1/4
250174080.
TRANSISTOR
SVD1SR35200A
DIODE
R215
ERDS2T
U4T72
4.7K
1/4
R317
ERDS2T
J473
41K
1/4
R946
ERDS2TJ124
120K
1/4
2SAS33SQR
TRANSISTOR
MA4150M
DIODE
R219
ERDS2TJIZ2
«1.2K
«(1/4
Ra2t
ERDS2TJ223
2K
1/4
R947
ERDS2TJ274
270K
(1/4
TRANSISTOR
MA4O62M
DIODE
R220
ERDS2TJ103
10K
1/4
R322
ERDS2T
J223
2K
1/4
R948
ERDS2T
J273
21K
1/4
TRANSISTOR
MA4330L
DIODE
R21
ERDS2TJ104
—«100K._—«*1/4
R325
ERDS2TJ102.
«1K
R949
ERDS2TJ474.
—ATOK
1/4
TRANSISTOR
‘
MATES
DIODE
ROM
ERDS2TUA73.
47K
R326
ERDS2TJ102
1K
o1/4
R951
ERDS2TJ104
100K_-1/4
TRANSISTOR
MATES
DIODE
R228
ERDS2TU102
1K
1/4
R328
ERDS2T
J473
41K
1/4
R952
ERDS2T
J104
100K
1/4
280174080
TRANSISTOR
MA165
DIODE
R230
ERDS2TJ104
—-100K_—«*1/4
R329
ERDS2TJ824
820K.
«1/4
R954
ERDS2TJ102«1K_—1/4
eeciTasd
TRANSISTOR
MAIES
DIODE
R231
ERDS2TJ102
1K
1/4
R331
ERDS2T
J221
220
1/4
R955
ERDS2TJ102
IK
1/4
2SC260BEFG
TRANSISTOR
DIODE
R232
ERDS2T
122
1.2K
1/4
R332
ERDS2TJ221
220
1/4
ERDS2T
J561
2SC2603EFG
TRANSISTOR
DIODE
R233
ERDS2TJ684
680K
1/4
ilies
se
ee
2SDI450RSTA
TRANSISTOR
DIODE
R234
ERDS2TJ103
«10K
1/4
ale
Siete
eon
Cl
ECBTIHI02KBS
0.001
50
2SD\450RSTA
TRANSISTOR
DIODE
ERDS2T J222 2.2K 1/4
TRANS1 STOR DIODE
TRANSISTOR DIODE
2SC3940AQSTA TRANSISTOR DIODE
DIODE
—19-— —20—

ST-X999L
coe ee ee ee ee
0909
RLFETNGMO2ZLC CERAMIC Fi LTER(ORANGE)
RLFETNGMO2LB CERAMIC FILTER(BLUE)
RLFETNGMO2LC CERAMIC FILTER(ORANGE)
DISPLAYS
FLSOt SADFV273G DISPLAY TUBE
FUSES
XBA2C04TBO FUSE, T0.4A 250V
XBA2C25TBO FUSE, T2.5A 250V
SSR187-1 SW, VOLTAGE SELECTOR
VARIABLE
RESISTORS
EVQQB005R
Sw,
1
VR301 EVNDXAA00B53_—s«V.R.. MPX VCO ADJ. EVQQB005R SW, 2
EVOQBOGER 9
CcT901 ECRLAO10A52 TRIMMER CAPACITOR EVQQBO0SR Sw. 5
EVOQBIIER SV.6
ul RLQZPIR2KT-Y CHOKE COIL EVQQB005R SW. 7
RLQZPIR2KT-Y CHOKE COIL EVQQB005R SW, 8
RLQY15S5-0 ANTENNA COIL EVQQB005R Sw, 9
RLQZPR22KT-Y COIL EVQQB005R Sw, 0
RLQZPIR2KT-Y CHOKE COIL EVQQB005R SW, MEMORY
ELEPKR22MA COIL EVQQB005R SW. CLOCK SET
ELEPKR22MA COIL EVQQB005R SW, SELECT
SLM1BO-P MPX COIL EVQQB005R SW, SELECT
SLMIBS-P MPX COIL EVQQBO005R SW, SET
RLQZPIOIKT-Y COIL EVQQB005R Sw, READ
RLQZPIOIKT-Y COIL EVQQB005R SW, STAND-BY
RL 1 4B002-Z |.F. TRANSFORMER EVQQB005R Sw, CANCEL
RL! 4B003-Z |.F. TRANSFORMER EVQQB005R SW, SLEEP :
SLTSK262-K POWER TRANSFORMER EVQQB005R Sw, FM MODE
EVQQB005R SW, TUNING DOWN
SLT5K263-K POWER TRANSFORMER EVQQB005R SW. TUNING UP
EVQQB005R SW, BAND FM
SLT5K264-K POWER TRANSFORMER EVQQB005R Sw, BAND MW
EVQQBO05R SW. BAND LW
See EVOGBIOER SV, POWER
Z202 SLITZIOI-T —_1,F. TRANSFORMER
2251 SLAGZ1-T COIL RLY701 A SSY138 RELAY
all Se Oe eee
SVQ49U722-S CRYSTAL OSCILLATOR
CF201 RLFETNGMO2LB CERAMIC FI LTER(BLUE) SVQ49U422T-S CRYSTAL OSCILLATOR
—-21-—

SBC989D BUTTON. PRESET
16 SBCS8SE BUTTON, PRESET
16
SGP7360E REAR PANEL
(E) 17 $BZ9104 BUTTON, PRESET
SGP7362B REAR PANEL 2 SGX7971A ORNAMENT
22 XTBS3+8UFZ1 SCREW
SGP7363A REAR PANEL 23 XTB3+8G SCREW
24 XTB3+20J SCREW
SKL307 FOOT 25 SKC2061K16 CABINET
$JS9221 AC OUTLET 26 SNE2120-1 SCREW
27 A SJT390 FUSE HOLDER
SJS9225 AC OUTLET 2B SJFD4 TERMINAL BOARD, OUTPUT
2 SUF&B05N TERMINAL BOARD, ANT
SHE181 HOLDER 23 SJF8402N TERMINAL PLATE
SUW3102 BRACKET (G
SUS874 SPRING 0 4 SJS9236 AC INLET
RYP0066 FRONT PANEL 3 SJTSO740LX-V_ CONNECTOR(7P)(CN902)
SHG6390 RUBBER SPACER K% SJT31143-V CONNECTOR(11P)(CN901)
10 SGXTX990-KG = FRONT GRILLE 8B SKU11651-4 BOTTOM BOARD
rf SBC986 BUTTON, POWER 34 RJS1A0203-0M = SOCKET(3P(JK901)
12 SBC1029A BUTTON. SELECTOR & SJS9332A AC OUTLET COVER
14 SBCS88 BUTTON, TIMER
SJS9332B AC OUTLET
SJAIS3 POWER CORD
RPGO106 PACKING CASE
SPS5169 PAD SuP2269 CORD
SPS5170 PAD SPB1162T AM LOOP ANTENNA
SPS5073 PAD SMA233~1M HOLDER
SMAZ31M BRACKET
XTB3+10AFZ SCREW
RQFO0031 INSTRUCT 1 ON MANUAL SSA269M FM ANTENNA
RQFOOS2
INSTRUCT
1
ON
MANUAL
SSA270M
FM
ANTENNA
RQFO093 INSTRUCT ! ON MANUAL SWKTXS30E LEAD WIRE
SJP9009 ATTACHMENT PLUG
RJA0004 POWER CORD
RJP120ZBS-H = AC PLUG ADAPTOR
SFDACOSE03 POWER CORD
EUR64754 REMOTE CONTROLLER
—22—