Sony STR-GX49ES User manual

FM Stereo/FM-AM
Receiver
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Operating Instructions
STR-GX49ES
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© 1992 by Sony Corporation

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WARNING
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK,
' DO NOT REMOVE COVER (OR BACK).
NO USER-SERVICEABLE PARTS INSIDE.
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL.
This symbol is intended to alert the user to
the presence of uninsulated ‘dangerous
voltage" within the product's enclosure that
may be of sufficient magnitude to constitute
a risk of electric shock to persons.
This symbol in intended to alert the user to
the presence of important operating and
maintenance (servicing) instructions in the
literature accompanying the appliance.
Note to CATV system installer
This reminder is provided to call the CATV system
installer's attention to Article 820-40 of the NEC that
provides guidelines for proper grounding and, in
particular, specifies that the cable ground shall be
connected to the grounding system of the building, as
close to the point of cable entry as practical.
INFORMATION
This equipment generates and uses radio frequency
energy and if not installed and used properly, that is, in
strict accordance with the manufacturer's instructions, may
cause interference to radio and television reception. It has
been type tested and found to comply with the limits for a
Class B computing device in accordance with the
specifications in Subpart J of Part 15 of FCC Rules, which
are designed to provide reasonable protection against
such interference in a residential installation. However,
there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause
interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is
encouraged to try to correct the interference by one or
more of the following measures:
Reorient the receiving antenna
Relocate the equipment with respect to the receiver
Move the equipment away from the receiver
Plug the equipment into a different outlet so that
equipment and receiver are on different branch circuits,
if necessary, the user should consult the dealer or an
experienced radio/television technician for additional
suggestions. The user may find the following booklet
prepared by the Federal Communications Commission
helpful:
"How to identify and Resolve Radio-TV Interference
Problems". This booklet is available from the U.S.
Government Printing Office, Washington, DC 20402, Stock
No. 004-000-00345-4.
For the customers in Canada
r CAUTION :-
TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS
POLARIZED AC PLUG WITH AN EXTENSION CORD,
RECEPTACLE OR OTHER OUTLET UNLESS THE
BLADES CAN BE FULLY INSERTED TO PREVENT
BLADE EXPOSURE.
This apparatus complies with the Class B limits for radio
noise emissions set out in Radio Interference Regulations.
Owner's Record
The model number is located on the rear exterior and serial
number is on the rear. Record the serial number in the
space provided below. Refer to these numbers whenever
you call upon your Sony dealer regarding this product.
Model No. STR-GX49ES Serial No._
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Introduction
Features.
Precautions.
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Chapter 1 Getting Started
Installing. l.5
Notes on installing.[.5
Installing batteries.i.5
Changing the AM tuning interval.i.5
Connecting the system.[.6
Notes on connection.6
Connection diagram.6
Connecting the AM antenna.7
Connecting the FM antenna.7
Connecting the antenna ground.7
Connecting speaker systems.8
Using AC outlets . .. . . 8
Parts Identification. 9
Front panel.9
Remote commander RM-S103.10
Chapter 2 Using Your Receiver
Audio adjustment...
Volume adjustment.
Balance adjustment.
Sound quality adjustment.
Receiving FM/AM broadcasts.
Tuning in an FM station automatically
— Automatic Tuning.
Tuning in an FM/AM station manually
— Manual Tuning...
Memorizing a station.
Tuning in a preset station.j.
Listening to program source other than broadcasts;
Recording on an audio tape
Recording.
Tape dubbing.
Recording on a VCR
Recording audio programs
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Chapter 3 Other Information
Troubleshooting..18
Specifications.20
Quick reference.Back cover

Precautions
The STR-GX49ES is a receiver which controls audio/video
sources. The unit allows you to switch easily among a
variety of audio/video programs.
Amplifier
• Optical Legato Linear A System allows the receiver to
operate automatically as a class A amplifier when the
level is low and as a class B amplifier when the level is
high without disturbing the sound signal. This minimizes
total harmonic distortion at every sound stage.
• These receivers have a spontaneous twin drive power
circuit. Condensers having large capacity are used
independently for the voltage amplification drive stage
of class A and power output stage of class B. Thus, a
stable output and high quality sound are obtained,
resulting in exclusion of power interferences.
The class A stage realizes a stable operation free from
interference of the power stage even when an
instantaneous or strong output is received.
• A source direct switch is employed to reproduce high
fidelity sound.
Any source can be reproduced without passing through
the circuits of tone control, loudness switch and balance
control.
Tuner
• Precise tuning is obtained thanks to the quartz-locked
digital synthesizer system.
• A total of 30 FM/AM stations can be preset in 3 memory
pages (A, B and C) that allow you to classify stations.
Remote commander
• The remote commander allows you to control most of
Sony’s audio equipment from a distance.
On safety
• Operate the unit only on 120 V AC, 60 Hz.
• Should any solid object or liquid fall into the cabinet,
unplug the unit and have it checked by qualified
personnel before operating it any further.
• Unplug the unit from the wall outlet if it is not to be used
for an extended period of time. To disconnect the cord,
pull it out by grasping the plug. Never pull the cord
itself.
• One blade of the plug is wider than the other for the
purpose of safety and will fit into the power outlet only
one way. If you are unable to insert the plug fully into the
outlet, contact your dealer.
On operation
• Before making program source connections, be sure to
turn the power switch off and unplug the unit.
m When the unit is not used, turn the power off, to
conserve energy and to extend the useful life of your
unit.
On cleaning the cabinet
Clean the cabinet, panel and controls with a soft cloth
lightly moistened with mild detergent solution. Do not use
any type of abrasive pad, scouring powder, or solvent such
as alcohol or benzine.
For the customers in the U.S.A.
For detailed safety precautions, see the “IMPORTANT
SAFEGUARDS" leaflet.
If you have any question or problem concerning your unit,
please consult your nearest Sony dealer.
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Installing
Chapter 1 Getting Started
The AM tuning interval is preset to 10 kHz. To use the
receiver where the frequency allocation system is based on
a 9 kHz interval, make the following adjustments.
To prevent internal heat buildup in the unit,
place the unit in a location with adequate air circi
Notes on Installation j
Changing the AM tuning interval
Do not install the unit:
— near heat sources such as radiators or air ducts.
— in a place subject to direct sunlight, excessive dust,
mechanical vibration or shock.
Do not place anything on top of the cabinet.
1 Turn on the power and tune in any AM station.
2 Turn off the power.
3 Press POWER while pressing the “+" TUNING
button.
The top ventilation holes must be unobstructed for the
proper operation of the unit and to prolong the life; of its
components.
Installing Batteries
To reset the AM tuning interval, repeat the above steps.
Caution
When the interval is changed, all preset stations which you
have memorized will be erased. After changing the interval,
be sure to preset the stations again.
Before operating remote commander, install the batteries
as shown.
Do not throw away the carton and packing material!
It will be an ideal container when transporting the system for
repair work, etc.
To avoid damage caused by battery leakage and
corrosion
When the commander will not be used for a long tine,
remove the batteries.
Normal operation can be expected about a half ye ; ar using
Sony SUM-3 (NS), and a year using Sony AM-3 (NyV)
alkaline batteries. j
When the batteries are run down, the remote commander
will not operate the unit. In this case, replace battej-ies with
new ones. j
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• The power cord should be connected last of all, after making sure that the POWER switch is turned off.
• The cable connectors should be fully inserted into the jacks. A loose connection may cause hum and noise.
• Cord plugs and jacks are color coded. The red plugs and jacks are to be connected to the right channel(R) and white
ones to the left-channel(L).
Connection Diagram
e numbers in the illustration correspond to those on the following pages.
© FM antenna Outdoor FM antenna
(supplied) (optional)
©Speaker system
(A speakers)
©AM antenna
(supplied)
Right Left
© SPEAKER
IMPEDANCE
SELECTOR
-©AC OUTLET
to a wall outlet
Record player
© Speaker system
(B speakers)
Right Left
-CD player
Tape deck VCR deck Second tape deck

Connecting the AM Antenna
Receiver
©@©@
@© ©©
urn
Adjust the
direction.
Supplied loop
antenna
For areas with difficult AM reception
In areas with troubled reception, connect a 6 to 15-hieter
(20 to 50-foot) insulated wire to the AM antenna terminal.
Extend this out of doors if possible, keeping the greater
portion horizontal.
(There is no need to disconnect the supplied antenna.)
Connecting the FM Antenna
Connecting the Antenna Ground
To prevent hum, connect the ground wire to ANTENNA
ground terminal (rk).
When an outdoor antenna is installed, be sure to connect
the ground wire for lightning protection.
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ConhSctijiigthe System
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Connecting Speaker Systems
Note Speaker impedance and power capability
Once the speakers have been connected, move This receiver is designed to work best with speakers having
SPEAKERS selector (on the front panel) to A, B or A + B nominal impedance from 4 to 16 ohms at rated 50 watts RMS per
setting. channel with an 8 ohms load from 20 — 20,000 Hz.
When using the headphones, set the SPEAKERS
selector to OFF.
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E POWER switch
E SHIFT button (Pages 13 and 14)
[3] Remote control sensor
\M TAPE MONITOR indicator
[U Display window
HI TAPE MONITOR switch (Page 15)
[7] Function selectors
HD MUTING button and indicator (Page 11)
HI ATTENUATOR and indicator (Page 11)
[13 SPEAKERS selector (Page 8)
HD HEADPHONES jack
;Ak«j 5 i t :*-! hAM s
ID FM MODE button (Page 12)
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dl FM TUNE MODE switgh (Pages 12 and 13)
ED FM/AM BAND selectors (Pages 12 and 13)
E MEMORY button (Page 13)
QU TUNING -/+ buttons (Pages 12.and 13)
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DU PRESET TUNING -/+ buttons (Page 14)
OH Numeric buttons (Pages 13 and 14)
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OH TONE controls (Page 1 1 )
} ■ !'
[U SOURCE DIRECT buttpn (Page 11)
1 .. -\-
HD LOUDNESS switch (Page 11)
(22l BALANCE control (Page 11)

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HI POWER button
H DBFB button
This button does not operate with this receiver.
0 TUNER PRESET +/- and SHIFT buttons
(Pages 13 and 14)
0 VOLUME +/- buttons
0 SURROUND button
This button does not operate with this receiver.
0 MUTING button (Page 11)
0 CD player operation buttons*
D. (disc) SKIP: When your CD player is equipped with a
multi-disc changer, use this button to select loaded
disc.
CD ► : Selects the CD function and starts CD playback.
0 DECK B operation buttons* (also for single tape
deck)
DECK B ◄ / ► : Select tape function and start tape
playback on deck B.
0 DECK A operation buttons*
DECK A ◄ / ► : Select tape function and start tape
playback on deck A.
DS Function select buttons
* These buttons control Sony audio components.
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