Technics Quartz ST-G7 User Manual

ORDER NO. HAD84062801C9
Service
Manual
Tuner
CYUARTZ
Synthesizer
ST-G
A
FM/AM
Stereo
Tuner
eaten
| (K) ...Black Type
(S)...Silver Type
SPECIFICATIONS
(DIN 45 500)
@ FM TUNER SECTION
87.50~108.00 MHz
87.525~108.025 MHz (+25 kHz shift)
Frequency range
Sensitivity 1.2 uV (IHF, usable)
S/N 30 dB 1.1 pV (75Q)
S/N 26 dB 1.0 pV (75Q)
S/N 20 dB 0.9 wV (75Q)
IHF 46 dB stereo quieting sensitivity 28 pV/75Q
Total harmonic distortion
MONO 0.01%
STEREO 0.02%
Dynamic range 116 dB
Frequency response 4 Hz~18 kHz, +0.2 dB~ —0.5 dB
Alternate channel selectivity
normal +400 kHz 55 dB
super narrow +200 kHz 25 dB
Capture ratio 1.0 dB
Image rejection at 98 MHz 105 dB
IF rejection at 98 MHz 110 dB
Spurious response rejection at 98 MHz 110 dB
AM suppression 70 dB
Stereo separation
1 kHz 65 dB
10 kHz 50 dB
Carrier leak
19 kHz —70 dB
38 kHz —70 dB
Channel balance (250 Hz~6,300 Hz) +1.0 dB
Limiting point 0.75 pV
Technics
.. Scandinavia and
Switzerland
...United Kingdom
.. southeast Asia,
Oceania, Africa,
Middle Near East
and Central South
America
(K)(S) | [XL] ...Australia
(K)(S) | [EH] ...Holland
(K)(S) | [EB] ...Belgium
(K)(S) | [EF] ...France
(K)(S) | [PC] ...European Audio
Club
(K)(S) | [PA] ...Far East PX
(K)(S) | [PE] ...European Military
(K)(S) | [EGA]...F.R. Germany
Bandwidth
IF amplifier 180 kHz
FM demodulator 1000 kHz
Antenna terminals
75Q (unbalanced)
@ AM TUNER SECTION
Frequency range
(For Europe, South Africa and Australia)
522~1629 kHz (9 kHz-step)
530~1620 kHz (10 kHz-step)
(For Saudi Arabia and others)
531~1620 kHz (9 kHz-step)
530~1620 kHz (10 kHz-step)
Sensitivity (S/N 20 dB) 20 pV, 290 uV/m
Selectivity (£9 kHz) 55 dB
Image rejection at 999 kHz AO dB
IF rejection at 999 kHz 65 dB
@ GENERAL
Output voltage 0.6V
Power consumption 11W
AC 50 Hz/60 Hz, 110V/120V/220V /240V
430 xX 97 X 76mm
(16-15/16" X 3-13/16” x 1-7/8")
Weight 4.1 ky @ Ib.)
Power supply
Dimensions (WxXHXD)
¢ Specifications are subject to change without noice for
further improvement.
* Weights and dimensions shown are approximate.
Panasonic Tokyo
Matsushita Electric Industrial Co., Ltd.
1-2, 1-chome, Shibakoen, Minato-ku, Tokyo 105 Japan
Matsushita Electric Tradng Co., Ltd.
P.O. Box 288, Centry Osaka Japan

Technics Quartz ST-G7 Specifications

General

Tuning Type	Quartz Synthesizer
Tuning Scale	Digital
Signal-to-Noise Ratio (AM)	50dB
Tuning Bands	FM
FM Frequency Range	87.5 - 108 MHz
Total Harmonic Distortion (FM)	0.15%
Frequency Response (FM)	20Hz to 15kHz
Type	Stereo Tuner

Summary

SPECIFICATIONS

SAFETY PRECAUTION

INSULATION RESISTANCE TEST

Procedure to test insulation resistance for safety, preventing electric shock hazards.

LOCATION OF CONTROLS

HOW TO OPERATE

Listening to Radio Broadcasts

Instructions for powering on, selecting bands, and tuning to FM and AM radio stations.

How to Preset Radio Broadcast Frequencies

Memory Presetting

Guides on automatic and manual memory presetting for storing broadcast frequencies, including station naming.

BEFORE REPAIR AND ADJUSTMENT

MEASUREMENTS AND ADJUSTMENTS

AM ADJUSTMENT

Procedures, settings, and test equipment required for accurate AM tuning adjustments.

FM SEPARATION ADJUSTMENT

Steps to adjust stereo separation for optimal channel isolation and clarity.

FM SIGNAL STRENGTH LEVEL ADJUSTMENT

Procedure to calibrate the signal strength meter for accurate reception indication.

FM MONO DISTORTION ADJUSTMENT

FM-RF ADJUSTMENT

FM PILOT CANCEL ADJUSTMENT

FM STEREO DISTORTION ADJUSTMENT

FUNCTION OF TERMINALS

BLOCK DIAGRAM

CIRCUIT BOARDS AND WIRING CONNECTION DIAGRAM

SCHEMATIC DIAGRAM

EXPLODED VIEW