Technics QUARTZ SA-GX100

Service
Manual
Receiver
CQUARTZ Synthesizer
AM/FM Stereo Receiver
SPECIFICATIONS (DIN 45 500)
@ AMPLIFIER SECTION
Power output
DIN
1
kHz
2x
40W(4Q)
40 Hz~20 kHz continuous power output
both
channels
driven
2
x
30
W
(8
Q)
Total
harmonic
distortion
rated
power
at
40
Hz~20
kHz
0.5
%
(8
Q)
half
power
at
1
kHz
0.03
%
(8
Q)
‘ntermodulation distortion
rated
power
at
60
Hz:
7
kHz=4:1,
SMPTE,
8
©
0.5
%
Power bandwidth
both
channels
driven,
—3
dB
10
Hz~40
kHz
(8
Q)
Damping
factor
40
(8
Q)
Input
sensitivity
and
impedance
PHONO
3
mV/47
kQ
CD,
VCR
1,
TAPE/VCR
2
:
200
mV/22
kQ
PHONO
maximum
input
voltage
(1
kHz,
RMS)
150
mV
SIN
rated power (8 ©)
PHONO
70
dB
(IHF,
A:
80
dB)
CD,
VCR
1,
TAPE/VCR
2
80
dB
(IHF,
A:
90
dB)
._ Frequency response
PHONO
RIAA
standard
curve
+0.8 dB (30 Hz~15 kHz)
CD,
VCR
1,
TAPE/VCR
2
10
Hz~40
kHz
(+3
dB)
Bass
50
Hz,
+10
dB~—10
dB
Treble
20
kHz,
+10
dB~—10
dB
Technics
SA-GX100
Color
(K)... Black Type
Area
Loudness control (volume at —30 dB) 50 Hz, +9 dB
Output voltage
VCR 1 AUDIO OUT, TAPE/VCR 2 REC OUT 200 mV
Channel
balance,
250
Hz~6,300
Hz
+1
dB
Channel separation §5 dB
Headphones output level and impedance 430 mMW/BO Q
Load impedance
AorB 40O™M6Q
A and B 8N™60
MM FM TUNER SECTION
Frequency
range
87.50~
108.00
MHz
Sensitivity
SIN
30
dB
;
1.5
uv
(15
Q)
SIN
26
dB
;
1.3
yV
(15
Q)
S/N 20 dB 1.2 uV (15 Q)
IHF
usable
sensitivity
1.5
pV
(IHF'58,
156
)
IHF
46
dB
stereo
quieting
sensitivity
22
wr
Q
Total harmonic distortion
MONO C2 %
STEREO (3 %
SIN
MONO
;
60
dB
(75
dB,
IHF)
STEREO
58
dB
(71
dB
FF)
Frequency response 20 Hz~15 kHz, +1 dB~~-2 dB
Matsushita Electric Industrial Co., _ td.
Central P.O. Box 288, Osaka 530-91, Jipan
'
Country
(EG) F.R. Germany & Italy.
Se ae Local yee

Technics QUARTZ SA-GX100 Specifications

General

Total harmonic distortion	0.05%
Speaker load impedance	8Ω to 16Ω
Tuning range	FM: 87.5 - 108 MHz
Input sensitivity	150mV (line)
Dimensions	430 x 135 x 310 mm
Power output	100W per channel (8 ohms, 20Hz - 20kHz)

Summary

AMPLIFIER SECTION

Power Output and Distortion

FM TUNER SECTION

Frequency Range and Sensitivity

CONNECTIONS TO EQUIPMENT

Audio and Remote Control Connections

FRONT PANEL CONTROLS AND FUNCTIONS

Amplifier Section Controls

Explains speaker selectors, muting/loudness indicators, tape indicator, volume, and tone controls.

Tuner and Input Controls

TUNER SECTION CONTROLS

Power, Reception, and Display

Tuning, Memory, and Mode Selection

Details tuning, memory operations, band selection, and FM mode.

REMOTE-CONTROL OPERATION

Tape Deck and Amplifier Controls

Describes remote control functions for tape decks and amplifier operations.

Tuner Controls

Details remote control operation for tuner functions like power and tuning.

PROTECTION CIRCUITRY

Circuit Function and Troubleshooting

Explains the protection circuit's purpose and how to troubleshoot activation.

BEFORE REPAIR AND ADJUSTMENTS

Pre-Repair Procedures

Outlines essential steps before starting repairs, including safety precautions.

DISASSEMBLY INSTRUCTIONS

Cabinet and Front Panel Removal

DISASSEMBLY INSTRUCTIONS (Continued)

MEASUREMENTS AND ADJUSTMENTS

Adjustment Points and FM Mono Distortion

Identifies adjustment points and details FM mono distortion adjustment.

FM Adjustment Setup

FM ADJUSTMENTS (Continued)

FM MPX VCO and Stereo Distortion Adjustment

Procedures for adjusting FM MPX VCO and FM stereo distortion.

TERMINAL FUNCTION OF IC

IC901 Microcomputer Pin Functions

Details pin functions for the microcomputer IC901.

BLOCK DIAGRAM

System Overview

A high-level block diagram illustrating the main functional blocks of the receiver.

SCHEMATIC DIAGRAM

Tuner Circuit Schematic

Detailed schematic for the FM and AM tuner sections.

Main Circuit Schematic

Schematic diagram for the main audio processing and control circuits.

SCHEMATIC DIAGRAM (Continued)

FL Drive and Operation Circuit Schematics

PRINTED CIRCUIT BOARDS

Tuner, Tone Amp, Volume, Operation PCB Layouts

WIRING CONNECTION DIAGRAM

Power, AC, and Main PCB Wiring

Diagram showing wiring for power, AC input, main PCB, and tuner PCB.

Sub-PCB Wiring Connections

EXPLODED VIEW

Cabinet and Panel Assembly

REPLACEMENT PARTS LIST

Cabinet, Cables, Controls, and Accessories

REPLACEMENT PARTS LIST (Continued)

Integrated Circuits (ICs)

Lists part numbers for all integrated circuits.

Transistors

RESISTORS & CAPACITORS

Resistor List

Comprehensive list of resistors with part numbers and values.

Capacitor List

Comprehensive list of capacitors with part numbers and values.

RESISTORS & CAPACITORS (Continued)

Capacitor List (Continued)

Continues the list of capacitors with part numbers and values.