Technics SU-G50 User Manual

Service
Manual
Stereo Integrated Amplifier
SPECIFICATIONS
(DIN 45 500)
m AMPLIFIER SECTION
40 Hz~20 kHz continuous power output
both channels driven 2x85 W (8Q)
DIN power output 2x 100 W (8Q)
Total harmonic distortion
rated power at 40 Hz~20 kHz 0.09% (8Q)
rated power at 1 kHz 0.05% (8Q)
half power at 1 kHz 0.03% (8Q)
Intermodulation.distortion
rated power at 50 Hz: 7 kHz=4:1, SMPTE, 80 0.09%
Power bandwidth both
channels driven, —3 dB 10 Hz~20 kHz (8Q, THD 0.09%)
Residual hum and noise 1mvV
Input sensitivity and impedance
PHONO 2.5 mV/47 kQ
TUNER, CD, TAPE, VCR 2/TV, VCR 1/EQ 150 mV/47 kQO
PHONO maximum input voltage (1 kHz, RMS)
128 mV (135 mV, IHF ’66)
S/N
rated power (80)
PHONO 71 dB (IHF 66: 78 dB)
TUNER, CD, TAPE, VCR 2/TV, VCR 1/EQ
70 dB (IHF 66: 90 dB)
Frequency response
PHONO RIAA standard curve
+0.8 dB (30 Hz~ 15 kHz)
TUNER, CD, TAPE, VCR 2/TV, VCR 1/EQ
10 Hz~80 kHz (+0, —3 dB)
Technics
Matsushita Electric Industrial Co., Ltd.
Central P.O. Box 288, Osaka 530-91, Japan
ORDER NO. AD9006159C7
Amplifier
SU-G50
Color
(K) in ccsnecas Black Type
Area
Asia, Latin America,
(GC) Middle Near East and
Africa
Oceania
Far East-PX
(K)
Tone controls
BASS 50 Hz, +10 dB~—10 dB
TREBLE 20 kHz, +10 dB~—10dB
Super bass 80 Hz, +6 dB
Muting —20 dB
Output voltage
TAPE, VCR 1/EQ REC OUT 150 mV
Channel balance, CD 250 Hz~6,300 Hz +1dB
Channel separation, CD, 1 kHz 50 dB
Headphones output level and impedance 670 mV/3300.
Load impedance
AorB 80~160Q
AandB 80~160
m@ GENERAL
Power consumption 510 W
Power supply
For
Oceania:
AC
50
Hz/60
Hz,
240
V
For
others:
AC
50
Hz/60
Hz,
110
V/127
V/220
V/240
V
Dimensions
(WxHxD)
430
x
130.5x310
mm
(161%/6"x5%e"x 1272")
Weight
7.6
kg
(16.7
Ib.)
Notes:
1. Specifications are subject to change without notice.
2. Weight and dimensions are approximate.
3.
Total
harmonic
distortion
is
measured
by
the
digital
spectrum
analyzer.
Panasonic Tokyo Sales Department
Matsushita Electric Industrial Co., Ltd.
World Trade Center Bldg., 4-1, Hamamatsu-cho,
2-chome, Minato-ku, Tokyo 405, Japan

Technics SU-G50 Specifications

General

Input Impedance	47 kΩ
Signal-to-Noise Ratio	86dB (MM), 106dB (line)
Input sensitivity	2.5mV (MM), 150mV (line)
Damping factor	100
Speaker load impedance	4 Ω - 16 Ω
Frequency Response	5Hz-100kHz (+0 -3dB)

Summary

Technical Specifications

Amplifier Performance Metrics

Details amplifier output power, distortion, frequency response, and input sensitivities.

General Unit Features

Covers power consumption, power supply requirements, dimensions, and unit weight.

Service Preparation Procedures

Before Repair Safety Guidelines

Outlines critical safety steps before initiating repairs, including voltage discharge.

Protection Circuitry Overview

Front Panel Control Identification

Front Panel Button and Knob Descriptions

Rear Panel Connectivity Guide

Phono and CD Terminal Setup

Instructions for connecting turntables and CD players to the rear panel terminals.

Additional Rear Panel Connections

Tape, Tuner, and VCR Terminal Setup

AC Outlets and Speaker Wiring

Disassembly Instructions

Cabinet and Front Panel Removal

Step-by-step guide for removing the amplifier's cabinet and front panel.

PCB and Component Removal Procedures

Instructions for safely removing printed circuit boards and internal components.

Power Transformer and Power IC Removal

Procedure for removing the power transformer and power integrated circuits.

Chassis Component Disassembly

Rear Panel and Fan Motor Removal

Schematic Diagram Sections

Main and Operation Circuit Diagrams

Schematics for the main audio processing and operation control circuits.

Drive Circuits and Power Schematics

Circuit diagrams for amplifier drive stages, tone controls, and power supply.

Printed Circuit Board Layouts Overview

Printed Circuit Board Layouts

Main, Operation, and Volume/FL PCBs

Component Terminal Identification Guide

IC, Transistor, and Diode Terminal Details (Part 1)

IC, Transistor, and Diode Terminal Details (Part 2)

IC, Transistor, and Diode Terminal Details (Part 3)

IC, Transistor, and Diode Terminal Details (Part 4)

IC, Transistor, and Diode Terminal Details (Part 5)

Resistor and Capacitor Terminal Guides (Part 1)

Capacitor Value Details (Part 1)

Capacitor Value Details (Part 2)