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Technics ST-X302L

Technics ST-X302L
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ORDER
NO.
AD9103042C8
Service
Manual
STEREO
SYNTHESIZER
TUNER
SPECIFICATIONS
(DIN
45
500)
FMTUNER
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
(75Q)
S/N
26
dB
1.2
wV
(750)
S/N
20
dB
0.9
pV
(75)
IHF
46
dB
stereo
quieting
sensitivity
28
UV/75Q
Total
harmonic
distortion
MONO
0.15%
STEREO
0.3%
S/N
MONO
70
dB
(78
dB,
IHF)
STEREO
;
65
dB
(70
dB,
IHF)
Frequency
response
20
Hz~15
kHz,
+0.5
d(B~—1.5
dB
Alternate
channel
selectivity
+400
kHz
55
dB
Capture
ratio
1.0
dB
Image
rejection
at
98
MHz
45
dB
IF
rejection
at
98
MHz
90
dB
Spurious
response
rejection
at
98
MHz
75
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
pV
Bandwidth
IF
amplifier
180
kHz
FM
demodulator
1000
kHz
Antenna
terminals
75Q
(unbalanced)
™@
AMTUNER
SECTION
Frequency
range
MW
For
Continental
Europe,
Great
Britainand
Oceania
522
kHz~
1611
kHz
(9
kHz
steps)
530
kHz~
1620
kHz
(10
kHz
steps)
For
others
531
kHz~
1602
kHz
(9
kHz
steps)
530
kHz~1600
kHz
(10
kHz
steps)
Technics
Tuner
ST-X302L
Color
(K))
catscet-8
a8
Black
Type
Areas
Country
Goda
Area
Color
a
ra
ii
(E)
Continental
Europe
(EB)
Great
Britain
Asia,
Latin
America,
(K)
(GC)
Middle
Near
East
and
Africa
no
|
(GN)
Oceania
pike
LW
For
Continental
Europe,
Great
Britainand
Oceania
144
kKHz~
288
kH2
(9
kHz
steps)
146
kHz~
290
kHz
(9
kHz
steps)
For
others
153
kHz~279
kHz
(9
kHz
steps)
155
kHz~281
kHz
(9
kHz
steps)
Sensitivity
(S/N
20
dB)
MW
20LV,
300
pV/m
LW
50
pV
Selectivity
(+9
kHz)
MW
(at
999
kHz)
50
dB
LW
(at
254
kHz)
50
dB
Image
rejection
MW
(at
999
kHz)
40
dB
LW
(at
254 kHz)
40
dB
IF
rejection
MW
(at
999
kHz)
60
dB
LW
(at
254
kHz)
60
dB
m@
TIMER
SECTION
Clock
Quartz-lock
type
24-hour
indication
Functions
24-hour
programmable;
weekly
(1
setting)
once
imly
(1
setting)
sleep
(at
1~120
min.,
1
min.
intervals)
Programmable
content
Program
source
(FM,
MW,
LIV,
CD,
TAPE)
Timer
rec/timer
play/power
ON/OFF
setting
Designation
ofpreset
station
1
minute~23-hous,
59
minutes
(at
1-rain.
intervals)
sleep
once,
weekly
Setting
intervals
Priority
order
m@
GENERAL
Output
voitage
Power
consumption
Power
supply
For
Continental
Europe
AC
50
Hi60
Hz,
220
V
For
Great
Britain
and
Oceania
AC
50
Hy60
Hz,
240
V
For
others
AC
50
H2/60
Hz,
110
V/127
1/220
V/240
V
Dimensions
(WxHxD)
360
xi4.5x304
mm
(14%6%«
21%2"x
12")
Weight
2.3
kg
(5
Ib.)
Note:
Specifications
are
subject
to
change
without
noice.
Weight
and
dimensions
are
approximate.
0.3
¥
(0.6
V
IHF)
9
W
Standby
6
W)
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Technics ST-X302L Specifications

General IconGeneral
Tuning BandsFM, MW, LW
FM Tuning Range87.5 - 108 MHz
MW Tuning Range522 - 1611 kHz
LW Tuning Range153 - 279 kHz
Signal to Noise Ratio (MW/LW)50 dB
Total Harmonic Distortion (MW/LW)0.5%
Capture Ratio (FM)1.5 dB
IF Rejection (FM)90 dB
Output Level650 mV
Power Consumption8 W
Tuning SystemQuartz Synthesizer
FM Sensitivity1.2 µV (IHF)
Signal to Noise Ratio (FM)70 dB
Total Harmonic Distortion (FM)0.3%
Frequency Response (FM)30 Hz - 15 kHz
Dimensions (W x H x D)430 x 76 x 230 mm
Power Supply220-240V, 50/60Hz

Summary

SPECIFICATIONS

FM TUNER SECTION

Technical details for FM reception, including sensitivity, selectivity, and frequency response.

AM TUNER SECTION

Technical details for AM reception, covering frequency ranges, sensitivity, and selectivity for MW and LW.

TIMER SECTION

Information on the unit's timer features, including 24-hour programmability and sleep functions.

GENERAL SPECIFICATIONS

Overall electrical and physical specifications like power consumption, dimensions, and weight.

ACCESSORIES

STEREO CONNECTION AND AUDIO CABLES

Cables for stereo signal and L-type connections for audio input/output.

ANTENNAS AND POWER ACCESSORIES

Includes FM/AM antennas, remote control, batteries, and AC power cord for operation.

TIMER OPERATION CONTROLS

CLOCK AND SETTING BUTTONS

Buttons for setting clock, timer operations, sleep, cancel, and stand-by modes.

TIMER READ AND SELECT BUTTONS

Buttons used to check programmed settings and select timer operation types.

FRONT PANEL DISPLAY INDICATORS

TIMER AND OPERATIONAL DISPLAY

Indicators for timer modes (ONCE, WEEKLY, SLEEP), stand-by, and operation status.

TUNING AND RECEPTION INDICATORS

Indicators for time, tuning mode, quartz lock, FM stereo, and channel selection.

UNIT CONNECTIONS

EXTERNAL UNIT INTERCONNECTION

Steps for connecting stereo, L-type cables, and flat cables to other audio components.

TERMINAL DESCRIPTIONS

Details on "REMOTE OUT" and "AC OUTLET" terminals for system integration.

DISASSEMBLY PROCEDURE: EXTERNAL

CABINET AND FRONT PANEL REMOVAL

Instructions for safely removing the outer cabinet and front panel.

FL DRIVE AND OPERATION PCB REMOVAL

Steps for carefully removing the FL drive and operation circuit boards.

DISASSEMBLY PROCEDURE: INTERNAL

MAIN AND POWER SUPPLY PCB REMOVAL

Instructions for removing the main and power supply circuit boards.

FOOT REPLACEMENT

Procedure for replacing the unit's rubber feet.

MEASUREMENTS AND ADJUSTMENTS

FM ADJUSTMENT PROCEDURES

Detailed steps for adjusting FM mono distortion and MPX VCO parameters.

PLL CLOCK FREQUENCY ADJUSTMENT

Procedure for adjusting the PLL clock frequency using a frequency counter.

ADJUSTMENT POINT LOCATIONS

MAIN PCB ADJUSTMENT POINTS

Diagram illustrating the specific locations on the main PCB for various adjustments.

SCHEMATIC DIAGRAM

MAIN CIRCUIT DIAGRAM

Detailed schematic illustrating the main circuit board layout and components.

OPERATION AND SENSOR CIRCUIT DIAGRAMS

Schematics for the operation and sensor/operation circuit boards.

SCHEMATIC DIAGRAM: POWER SUPPLY

POWER SUPPLY CIRCUIT DIAGRAMS

Schematics detailing the power supply circuits for different geographical area configurations.

CIRCUIT BOARDS AND WIRING CONNECTION DIAGRAM

MAIN PCB AND POWER SUPPLY WIRING

Wiring diagrams illustrating connections for the main PCB and power supply units.

OPERATION AND SENSORFL DRIVE WIRING

Wiring diagrams showing connections for operation, sensor, and FL drive circuit boards.

COMPONENT IDENTIFICATION AND PANEL DESCRIPTION

IC, TRANSISTOR, AND DIODE GUIDE

Reference guide for identifying and understanding ICs, transistors, and diodes.

FL PANEL DISPLAY LAYOUT

Description of the front panel's FL display elements and their anode connections.

BLOCK DIAGRAM

TUNER AND SIGNAL PROCESSING BLOCKS

Block diagram of tuner, IF, MPX, and signal processing sections.

CONTROL AND POWER SUPPLY BLOCKS

Block diagram of microcomputer control, display, and power supply sections.

IC TERMINAL FUNCTIONS

MICROCOMPUTER (MN187125 STT) PINOUT

Detailed functional description for each pin of the main microcomputer IC.

REPLACEMENT PARTS LIST

INTEGRATED CIRCUITS AND TRANSISTORS

List of ICs and transistors with part numbers and descriptions.

DIODES, RESISTORS, AND CAPACITORS

List of diodes, resistors, and capacitors with part numbers and values.

REPLACEMENT PARTS LIST: SWITCHES AND CONNECTORS

SWITCHES, JACKS, AND FUSES

List of switches, antenna/output jacks, and fuses with part numbers.

CONNECTORS AND VARIABLE CAPACITORS

List of various connectors and variable capacitors with their part numbers.

RESISTOR AND CAPACITOR VALUES

RESISTOR SPECIFICATIONS

Detailed list of resistors, including part numbers, values, and wattage.

CAPACITOR SPECIFICATIONS

Detailed list of capacitors, including part numbers and capacitance values.

CAPACITOR SPECIFICATIONS CONTINUED

CAPACITOR VALUES

Continuation of the capacitor list with part numbers and capacitance values.

REPLACEMENT PARTS LIST: MISCELLANEOUS

CABINET PARTS AND PACKING MATERIAL

List of cabinet parts, packing materials, and accessory boxes.

ACCESSORIES AND MANUALS

List of accessories like remote control, batteries, and instruction manuals.

CABINET PARTS LOCATION DIAGRAM

EXTERNAL CABINET PART PLACEMENT

Diagram showing the location of external cabinet parts and connectors.

PACKING DIAGRAM

UNIT PACKING PROCEDURE

Illustration showing how the unit and accessories are packed for shipping.

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