Technics SU-7300 Service Manual

ORDER NO. $D7702-1195
ervice
Manual
Stereo Integrated Amplifier
OU-7300
(XA), (XAL), (XG), (XGH),
(XGF),(XSD), (XSW), (XE)
The model SU-7300 [XA] is available in Asia,
Latin America, Middle East and Africa.
The model SU-7300 [XAL] is available in Australia only.
The model SU-7300 [XG] is available in European only.
The model SU-7300 [XGH] is available Holland only.
The model SU-7300 [XSD] is available in Scandinavia only.
The model SU-7300 [XSW] is available in Switzerland only.
The model SU-7300 [XE] is available in England only.
The model SU-7300 [XGF] is available in France only.
The cabinet color shall be subject to change dependent on the
destination.
TECHNICAL SPECIFICATIONS (IH F) Specifications are subject to change without notice for further improvement.
AMPLIFIER SECTION Frequency response: PHONO RIAA standard curve +0.3dB
1kHz continuous power: both channels driven yew s roe (aa TUNER 7Hz posekie ede eee
Tone controls: BASS 50Hz, +12dB ~ —12dB
A48w + 48W (42) TREBLE 20kHz, +12dB ~ —12dB
4iw+4iwi(sQ)
Power bandwidth (both channels driven at 8Q):8Hz ~55kHz, —3d8 —_— High filter: 8kHz, —6dB/oct.
Total harmonic distortion: 0.08% at rated power (20Hz ~20kHz) | Loudness control (volume at —30dB): 100Hz, +8dB
0.04% at half power (20Hz ~20kHz) Output voltage and impedance:
0.02% at half power (1kHz) REC OUT (TAPE 1, 2) 150mV/1.2k0
i istortion: 08% (60Hz : 7 kHz =4: 1,SMPTE REC/PLAY (TAPE 1) output 30mV/82k0
psohinepaseelbe
ole
open
.
ya
Load
impedance:
MAIN
or
REMOTE
4~160
Damping factor: 20 (40), 40 (8)
Input sensitivity and impedance:
re
2.5mV/47kQ.
GENERAL
TUNER 150mV/47kQ. Power consumption: 400W
PLAYBACK (TAPE 1) 180mV/47kQ. ~=Power supply (50Hz/60Hz): 110V/120V/220V/240V
PLAYBACK (TAPE 2) 150mV/47k0. 240V only (Set for Australia)
REC/PLAY (TAPE 1) input 180mV/47kQ. ~——- Dimensions (W x H x D): 410 x 139 x 334mm
PHONO maximum input voltage (1kHz, RMS): 150mV (16-5/32"x5-15/32" x 13-5/32'')
Signal to noise ratio (IHF, A): PHONO 78dB Weight: 8.9kg (19.6lb)
TUNER 97dB
20Hz ~ 20kHz continuous power:
both channels driven
TECHNISCHE DATEN (DIN 45 500) Spezifikationen konnen infolge von Verbesserungen ohne AnkUndigung gedndert werden.
VERSTARKERTEIL Fremdspannungsabstard:
RMS-Dauertonleistung bei 1kHz: Nennleistung PHONO 63dB
beide Kandle zusammen ausgesteuert 2 x SBW (42) ; . TUNER 83dB
2 x 43W (82) —26dB Nennausgangsleistung PHONO 55dB
RMS-Dauertonleistung bei 20Hz ~ 20kHz: . TUNER 58dB
beide Kanale zusammen ausgesteuert 2 x 48W (40) 50mW Ausgangsleistung PHONO, TUNER 53dB
2x 41W (8Q) Frequenzgang: 7Hz ~ 80kHz, +0dB, —3dB
RMS-Dauertonleistung bei 40Hz ~ 16kHz: = 15Hz ~ 40kHz, +OdB, —1dB
beide Kanale zusammen ausgesteuert 2 x 48W (49) ~Kilangregler: BASSE (BASS) 50Hz, +12dB bis —12dB
2x
41W
(82)
HOHEN
(TREBLE)
20kHz,
+12dB
bis
—12dB
Leistungsbandbreite (beide Kanadle zusammen os :
ausgesteurt bei 42): 8Hz ~55kHz, —3dB. Hohenfilter (HIGH): 8kHz, —6dB/oct.
Harmonische Verzerrungen: GehGrrichtige Lautstarke (Lautstarke —30dB): 100Hz, +8dB
Nennausgangsleistung bei 1kHz, 42 0,08% Ausgangsspannungen: REC OUT (TAPE 1, 2) 150mV/1,2k0.
Nennausgangsleistung bei 40Hz ~ 16,000Hz, 40 0,08% . REC/PLAY (TAPE 1) Aufnahme 30mV/82kQ
—26dB Nennausgangsleistung bei 1kHz, 40 0,1% Kopfhérerpegel & Ausgangsimpedanz: 350mV/3300
5OmW Ausgangsleistung bei 1kHz, 40, 0.15% | Ausgangsimpedanz: MAIN oder REMOTE 4~160
Intermodulationsverzerrung:
Nennausgangsteistung bei 250Hz : 8,000Hz=4:1,49 0,08% Kanaltrennung: +1,5dB
Hum & noise: 0,6mvV Kanalabweichung: 50dB
Dampfungsfaktor: 20 (40), 40 (80)
Eingangsempfindlichkeit & Impedanz: ALLGEMEINE DATEN
PHONO 2,5mV/47kQ. _ Leistungsaufnahme: 400W
TUNER 150mV/47kQ ~=—s- Netzspannung (50Hz/60Hz): 110V/120V/220V/240V
PLAYBACK (TAPE 1) 180mV/47kQ Abmessungen (B x H x T): 410 x 139 x 334 mm
PLAYBACK (TAPE 2) 150mV/47kQ = Gewicht: 8,9kg
REC/PLAY (TAPE 1)Eing. 180mV/47kO. .
PHONO Maximale Eingangsspannungen (1kHz, RMS) 150mV
. M hita Electric Trading Co., Ltd.
Technics ee es ay pie Col oak Japan

Technics SU-7300 Specifications

General

Damping Factor	30
Speaker Load Impedance	4Ω to 16Ω
Input Sensitivity	2.5mV (MM)
Signal to Noise Ratio	90dB (line)
Channel Separation	55dB (line)
Output	150mV (line)

Summary

Technical Specifications

Amplifier Section

Details amplifier performance metrics like power, distortion, sensitivity, and input specifications.

General Specifications

Covers general amplifier specifications including power consumption, dimensions, and weight.

Location of Controls

Cabinet Removal Procedure

Chassis Removal Procedure

Alignment Instructions

Adjustment with DC Voltmeter

Procedure for adjusting power transistors using a DC voltmeter for voltage verification.

Service Aid

Shock Noise Prevention Circuit

Explanation of the shock noise prevention circuit during power ON-OFF operations.

Block Diagram

Schematic Diagram

Printed Circuit Board Layout

Schematic Diagrams of Power Source

Transistor and IC Guide

Integrated Circuit Block Diagram

Replacement Parts List

Exploded Views

Parts List Details

Accessories and Packings