Technics QUARTZ ST-X999 User manual

CYUARTZ Synthesizer
AM/FM Stereo Tuner
SPECIFICATIONS
(DIN 45 500)
m FM TUNER SECTION
Frequency range
Sensitivity
S/N 30 dB
S/N 26 dB
S/N 20 dB
IHF 46 dB stereo quieting sensitivity
Total harmonic distortion
MONO
STEREO
S/N
MONO
STEREO
Frequency response 20 Hz ~ 15 kHz,
Alternate channel selectivity
+400 kHz
Capture ratio
Image rejection at 98 MHz
IF rejection at 98 MHz
Spurious response rejection at 98 MHz
AM suppression
Stereo separation
1 kHz
Carrier leak
19 kHz
38 kHz
Channel balance (250 Hz ~ 6,300 Hz)
Limiting point
Bandwidth
IF amplifier
FM demodulator
Antenna terminals
m AM TUNER SECTION
Frequency range
MW
530 kHz ~ 1620
87.50~ 108.00 MHz (0.05 MHz-steps)
1.5 pV (IHF, usable)
~70 dB (—80 dB, IHF)
—75 dB (—80 dB, IHF)
Selectivity (+ 9 kHz)
MW (at 999 kHz)
iow
aot
image
rejection
1.2
pV
(759
)
0.9
pV
(750)
MW
(at
999
kHz)
28
uV/75Q
IF
rejection
MW
(at
999
kHz)
0.15%
ee
SECTION
0.3%
70
dB
(78
dB,IHF
)
Precision
65
dB
(71
dB,IHF
)
Functions
+0.5 dB ~ -1.5 dB
70 dB
1.0dB Programmable content
90 dB
90 dB
90dB_ Setting intervals
55 dB
Priority order
40dB & GENERAL
Output voltage
Power consumption
Power supply
+1.2dB Dimensions (W x H x D)
1.0 pV .
Weight
180 kHz
1000 kHz
75Q (unbalanced)
522 kHz ~ 1611 kHz (9 kHz-steps)
kHz (10 kHz-steps)
ORDER NO. AD89051 18C2
ervice
Manual
Tuner
3 T-X999
Color
| (K)...Black Type |
Area
Country
Code
Area
Color
(EG) | F. R. Germany & Italy (K)
Sensitivity (S/N 20 dB)
MW
20 pV,300 pV/m
55 dB
40 dB
60 dB
Quarz-jock 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)
Power ON/OFF setting
Designation of preset station
1 minute ~23 hours,59 minutes
(at 1-min.intervals)
sleep, once, weekly
0.5 V (1.0 V, IHF)
9W(clock 5W)
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.
Technics
Matsushita Electric Industrial Co., Ltd.
Central P.O. Box 288, Osaka 530-91, Japan

@ CONTENTS
Page
Page
ACCESSORIES. sis s2 Ses seed eee naeneaeehesaasa dad 2 CIRCUIT BOARDS AND WIRING CONNECTION
CONNECTIONS 2.0.0.0... ccc cece eee eet 2 DIAGRAM So. nasa cetais denied och eee 14~16
LOCATION OF CONTROLS ...............00 20 ee eens 3 FUNCTIONS OF IC TERMINALS.................0., 17
DISASSEMBLY INSTRUCTIONS ...............00. 4,5 DESCRIPTION OF FLPANEL ............2.....00.,. 18
MEASUREMENTS AND ADJUSTMENTS ............ 6,7 RESISTORS AND CAPACITORS ............... 19~21
BLOCK DIAGRAM .......... 000 e cece eter teens 8,9 REPLACEMENT PARTS LIST .................. 21~23
SCHEMATIC DIAGRAM ..............000 eee ee 10~13 EXPLODED VIEWS... 1... eect ee ees 24
TERMINAL GUIDE OF IC’S, TRANSISTORS AND
DIODES: “eidsrevnatetedeig cin fa Sis She owe nas Gs 14
m@ ACCESSORIES
Stereo connection cable (SUPK2203-1) .............. 1 ©3-core flat cable (SWKTX930E) ............. ccc ve ee 1
@FM indoor antenna (SSA270M) ................-.0005 1 e@AC power supply cord (SFDACO5E03) ................. 1
@AM loop antenna (SPB1162T) ............... ee ee eee 1 eRemote-control transmitter (EUR64754) .............. 1
e@AM
antenna
holders
(SMA233-1M)
..............-065
1
Batteries
(RO3)
.....
0.
cece
eee
eee
ee
2
(SMA231M) ....... 0. cece eee eee 1
e@Screws (XTB3+10AFZ) ..... 0... cee ccc eens 2
™@ CONNECTIONS
7 AM LOOP ANT
“SWITCHED” outlet:
This unit
CONTROL
AMPLIFIER eet
Stereo connection A
cable (included) AC power supply cord
(Included with amplifier)
3-core flat cable
(included)
Amplifier
(option)
Ze — @O0OOO
PQOOOO®
Audio equipment rated up to 500W can be connected.
Power is controlled by power switch of this unit.
Household AC outlet
2)
AC power supply cord
(included)
The configuration of the AC
outlet and AC power supply
cord differs according to
area.

ORDER NO. AD8905118C2-A
CQUARTZ Synthesizer
MW/FM Stereo Tuner
ST-X999
@ Frequenzzahler
@ Drosselspule(100,H)
@ Widerstand(100kQ)
m MESSUNGEN UND JUSTIERUNGEN
UKW JUSTIERUNGEN
Einstellungen der Bedienelemente und zu verwendende Gerate.
@ UKW-Messender(UKW-MS)
@ Stereo-Modulator
@ Verzerrungs-Analystator
@ Elektronische Gleichstrom-Voltmeter(EVM)
Anmerkung: Fir 2201, Z202, L321 und L322 werden bereits justierte Ersatzteile geliefert. Die Kerne dieser Teil daher nicht drehen.
UKW-MONO-VERZERRUNGS-JUSTIERUNG
1.Der Testaufbau ist in der Abbildung gezeigft.
2.Stellen Sie die Einheit auf “"FM(UKW)” Betrieb.
ZUSTAND DES UKW-MESSENDERS
Modulation
Modulationsfrequenz
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 gehaiten sind.
Anmerkung:
Fur die Justierung ist ein Schraubendreher aus
Kunststoff zu verwenden.
MPX-SGO-JUSTIERUNG
1.Der Testaufbau ist in der Abbildung gezeigt.
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.
@ VERWENDUNG EINES ALTERNATIVSYSTEMS
1.Stereosignal vom Mefsender eingeben oder eine
Stereo-Sendung empfangen.
2.VR301 justieren, bis die Stereo-Anzeige aufleuchtet.
Den Arm von VR301 mit Lack sichern, wie in der
Abbildung gezeigt.
Digitaler Frequenzmesser
“Stereo”
AUS
ZUSTAND DES UKW-MESSENDERS
Modulation ... 100%
Modulationsfrequenz .........0KHz
Ausgangspegel,
“Stereo” AUS Stellung
“Stereo” EIN Stellung
(Anzeigebeleuchtung)
Einstellpunkt des
pilotschaltkreis’

ELNSTELLUNG DER PHASENSPERRUNG EINES
SCHLEIFENVERSCHIUSSES
1.Der Anschlu8 der Testausriistung ist in der Abbiidung dargestellt.
2.TP903 und TP904 Uberbriicken.
3.CT901 unter Beobachtung des Frequenzzahlers auf 524,288
kHz+10 Hz einstellen.
4.Nach der Einstellung die Uberbriickung zwischen TP903 und
TP904 entfernen.
5.Den Netzschalter ausschalten.
UKW STEREO KLIRRFAKTOR-JUSTIERUNG
1.Der Testaufbau ist in der Abbildung gezeigt.
2.Stellen Sie die Einheit auf "FM(UKW)” Betrieb.
3.Die Radiofrequenzanzeige und den Messender auf
100.10MHz einstellen.
4.L1 so justieren, daB der Verzerrungsfaktor des linken
Kanals minimal wird.
5.,Uberprifen, daB die Verzerrungsfaktoren des linken und
rechten Kanals fast gleich sind.
Anmerkung:
Fur die Justierung ist ein Schraubendreher aus
Kunststoff zu verwenden.
Eine MeBsonde hoher Impedanz verwenden.
Digitaier Frequenzmesser
ZUSTAND DES UKW-MESSENDERS
Modulation “L”order “R” Betriebsart
90% ,Pilotssigna!l 10%
Modulationsfrequenz .........1kKHz(Pilot 19kHz)
Ausgangspegel
BEBO
UKW ANT — ay’
A 8
STEREO MOOULATOR
Abgabebetried ... L oder A
Printed in Japan
F890502,100 TW/FF/YY

m LOCATION OF CONTROLS
Tuner section
i
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
Es
Ae oo &
(=| [=| [>] [&) fs)
SS)
6||7 F
[1] Sleep button (SLEEP) [A] Stand-by indicator (STANDBY)
[2] Cancel button (CANCEL) Day display
[3] Stand-by button (STANDBY) 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-X990.

eRemote control transmitter (EUR64754)
oO
ROPE
m DISASSEMBLY INSTRUCTIONS
Ref. No.
1
Removal of the cabinet
|
Procedure
|
@Remove
the
4
screws
(@~Q).
|
1
-—___- +
Ref.No. | Removal of the front panel 3. Remove the 3 screws (Q@~®).
2 4. Remove the front panel in the direction of the arrow.
| Procedure | 1. Remove the flat cable (J901, J902).
1-2 2. Push the front panel in the direction of the arrow
@ and remove the holder in the direction of the
arrow @).
Removal of the flat cable
Pull out the flat cable
while pressing the
Flat
connector
cable
Connector

Ref. No.
3
2. Remove the 3 screws (@~®).
3. Slightly pull the front panel toward you and
remove the main P.C.B.
Removal of the main P.C.B.
Procedure | 1, Remove the 10 screws (Q@~®).
133
Removal of the preset tuning SW P.C.B.
and band/tuning/timer operation SW P.C.B.
Band/ tuning / timer
operation SW P.C.B.
Procedure
12-4
1. Remove the 4 screws (@~O).
2. Remove the band/tuning/timer operation SW
P.C.B.
3. Remove the 1 screw (@).
4.
Push
the
4
claws
and
remove
the
preset
tuning
AA
rae
SW
P.C.B.
Preset
tuning
SW
P.CB,
~~
4A)
§
-
‘
e
Ref. No.
5
=
Procedure
Removal of the remote control j
1.Remove the battery cover lid. 3.Insert a screwdriver blade between the
2.
Remove
the
one
screw
(@).
upper
and
lower
covers
inside
the
battery
compartment and them slowly loosen the
bottom cover.
Battery cover lid

m@ MEASUREMENTS AND ADJUSTMENTS
FM ADJUSTMENT
Control positions and equipment used
@ FM signal generator(FM-SG) @ Frequency counter
e@ Stereo modulator @ Choke coil({100uH)}
@ Distortion analyser @ Resistor(100kQ)
@ DC electronic voltmeter(EVM)
Note:
For
Z201
(AM-ANT/OSC),
Z202
(AM-IFT),
L321
(L.P.F)
and
L322
(L.P.F),
they
are
supplied
as
adjusted
parts.
So,
do
not
turn
the
cores
of
the
parts.
It is
not
necessary
to
adjust
the
AM
circuit.
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 leve!
100.10MHz.
4.Adjust the core of T201 so that the voltage measured in
signal mode is OmV(O0+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
100.10MHz.
4.Adjust VR301 for 19kHz+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
"*Stereo"’
OFF
FM SIGNAL GENERATOR CONDITION
Modulation one 100%
Modulation frequency ........ OkHz
Output level... eee 66dB
@-®,
O-©....... “Stereo” OFF position
®-®....... “Stereo” ON position
(indicator fighting)
Os edieicvece Adjust point of pilot
circult
PLL CLOCK FREQUENCY ADJUSTMENT Use a high impedance probe.
P : : ‘ ‘s Frequency Counter
1.Test equipment connection is shown in figure.
2.Short TP903 and TP904.
3.Adjust CT901 for 524.288kHz+10Hz on frequency
counter reading.
4. After the adjustment, open up the shorting between TP903 and
TP904.
5. Turn off the power switch.
kHz
a
TP901
0
Ee?
FM
ANT
(750)
TP902
(GND)

FM STEREO DISTORTION ADJUSTMENT
1.Test equipment connection is shown in figure.
2.Set the unit to "FM” mode.
3.Set the radio frequency display and signal generator to
100.10MHz.
4.Adjuste L1 so that the distortion factor of L-CH is minimized.
5.Make sure that the distortion factors of L-CH and R-CH
are nearly the same and minimum.
Modulation
Output level
Note: The adjusting screwdriver used should be made of
resin.
eADJUSTMENT POINTS
AMLOOP ANT FMANT 75Q
OUTPUT
|
(100.0 MHz)
fa]
FM FRONT-END PACK
FM offset
FM MONO distortion
PLL Clock FM MPX VCO
(19 KHz output) ]
~S
@|
PLL Clock
GND
{C901
FM MPX VCO
(19 kHz)
Modulation frequency
FM offset (—) adj
FM offset (+) adj
FM SIGNAL GENERATOR CONDITION
“L”mode or “R”mode 90%,
Pilot 10%
1kHz(Pilot 19kHz)
66d
FM ANT
AM ANT
AM Signal
Zi
FM FRONT END
faa ae
m@ BLOCK DIAGRAM
CF201 CF 202 8
sf
FM OSC
Q201,202 r i
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FM/AM
Loop filter
aa
FM MONO DISTORTION adj.
See
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det, coil FM/AM IF AMP. DET,
16 I7 de 4 med AMP
O==0 7
L C201
Q205
Signal
receive
detector
X10 (AM) Q207~209
(72MHz)
FM/AM =
Power supply a Y
selector =
ry
—
SDC
INT ©
PLL FREQUENCY RESET ©
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