Technics ST-7300 Service Manual

ORDER NO. SD7703-1200
FM/AM Stereo Tuner
ST-7300
(XA), (XAL), (XG), (XGH),
(XGF), (XSD), (XSW), (XE)
The model ST-7300 [XA] is available in Asia,
Latin America, Middle East and Africa only.
The model ST-7300 [XAL] is available in Australia only.
The model ST-7300 [XG] is available in European only.
The model ST-7300 [XGH] is available in Holland only.
The mode! ST-7300 [XGF] is available in France only.
The model ST-7300 [XSD] is available in Scandinavia only.
The model ST-7300 [XSW] is available in Switzerland only.
The model ST-7300 [XE] is available in England only.
The cabinet color shall be subject to change dependent on the destination.
TECHNICAL SPECIFICATIONS (1H F) Specifications are subject to change without notice for further improvement.
FM TUNER SECTION
Stereo separation: 45 dB at 1kHz, 35 dB at 10kHz
Frequency range: 88 ~ 108MHz Leak carrier (19kHz, 38kHz): —60 dB
Antenna terminals: 30012 (balanced)
si 780 (unbalanced) AM TUNER SECTION
Sensitivity: 2.0LV E . > 4
S/N 46 dB sensitivity: STEREO 19”V (750) veqheney tanga 525 ~ 1605kHz
Total harmonic distortion: tbe SOLV, 260HV/m
MONO 0.2% (100Hz), 0.2% (1kHz), 0.5% (6kHz) ‘Selectivity: — eeeaueaci: 20 dB
STEREO 0.4% (100HZz), 0.4% (1kHz), 0.5% (6kHz) tet eon eLiDOOKHicc ie a
S/N: MONO 75dB, STEREO 70dB8 SEENON at ae
: +0.2
Frequency response: 20Hz ~ 15kHz, ~10 dB GENERAL
Alternate
channel
selectivity:
75
dB
Output
voltage
&
impedance:
0.5V/4.7k
Capture ratio: 1.0dB Power supply: (50/60Hz2). 110/120/220/240V
Image
rejection
(at
98MHz):
55
dB
220V/240V
(for
united
kingdum)
IF rejection (at 98MHz2): 82 dB 240V only (for Australia)
Spurious response rejection (at 98MHz): 80dB Power consumption: 11W
AM suppression: 55 dB Dimensions (W x H x D):
410 x 139 x 317mm (165¢” x 55%" x 125%")
Weight: 5.1 kg (11.2 Ib.)
TECHNISCHE DATEN (DIN) Spezifikationen konnen infolge von Verbesserungen ohne AnkUndigung geadndert werden.
UKW-TUNERTEIL
Hilfstragerdampfung (Pilotton): —60 dB (19kHz)
Frequenzgang:
88
~
108MHz
—60
dB
(38kHz)
Eingangsimpedanz:
3002
(symmetrisch)
Begrenzungseinsatz:
|
1.2uV
75Q (unsymmetrisch) Bandbreite: ZF-Verstarker 200kHz
Empfindlichkeit
(+40kHz
deviation)
Ratiodetektor
820kHz
2.0V beim Rauschverh. v.30dB, 3000 Kanaltrennung: (250Hz ~ 6300Hz) +1.5dB
1.8V beim Rauschverh. v.26dB, 3000
1.5V beim Rauschverh. v.20dB, 3000
1.4V beim Rauschverh. v. 30 dB, 75Q AMET RNERTEIL
1.2V
beim
Rauschverh.
v.26dB,
759
frequenzgang:
Sigh
ote
; Eingangsempfindlichkeit: 30KV, 260uV/m
1.0V beim Rauschverh. v. 20 dB, 75 geo
:
Selektivitat:
20
dB
Klirrfaktor:
MONO
0,2%,
STEREO
0.4%
-
:
.
:
:
Rauschabstand
(+40kHz
Hub)
MONO
69d8,
STEREO
6508
—Spregelfrequenz
Selektion
bei
1000kHz:
ace
Selektivitat: 75 dB
Gleichwellenselektion: 1,0dB
Spiegel frequenzunterdriickung 98 MHz: 55dB ALLGEMEINE DATEN
ZF-Festigkeit
bei
98
MHz:
82
dB
Ausgangsaufnahme:
0.5V/4.7kQ
Unselektivitat-Dampfung bei 98 MHz: 80 dB Netzspannung: (50/60Hz) 110/120/220/240V
AM-Unterdruckung: 55 dB Leistungsaufnahme: 11W
Kanaltrennung: 45 dB bei 1kHz, 35 dB bei 10kHz Abmessungen (B x H x T): 410 x 139 x 317mm
Gewicht: 5.1kg
an od Matsushita Electric Trading Co., Ltd.
Technics
P.O.
Box
288,
Central
Osaka
Japan

Technics ST-7300 Specifications

General

Brand	Technics
Model	ST-7300
Category	Tuner
Language	English

Summary

Technical Specifications (IHF)

FM Tuner Section

Detailed specifications for the FM tuner section, including frequency range, sensitivity, and distortion.

AM Tuner Section

Detailed specifications for the AM tuner section, including frequency range, sensitivity, and selectivity.

General

Overall specifications including power supply, consumption, dimensions, and weight.

Location of Controls

Alignment Instructions

Detailed Alignment Procedures

Comprehensive procedures for AM/FM IF, RF, distortion, signal meter, muting, MPX, stereo separation, and recording level adjustments.

Block Diagram Overview

Alignment Adjustment Points

Identifies specific points on the circuit for adjustments.

Printed Circuit Board Details

Integrated Circuit Block Diagrams

IC 101 (AN217) Block Diagram

Block diagram for the FM IF Amplifier & AM Converter circuit.

IC 102 (AN377) Block Diagram

Block diagram for the FM IF Amplifier & Detector circuit.

IC 301 (AN363) Block Diagram

Schematic Diagram Sections

Power Source Schematic

Cabinet Removal Procedure

Replacement Parts List - Core Components

Exploded Views - Mechanical Assemblies

Dial Cord Installation Guide