3-753-022-22(1) A15
FM Steiw/FM-AM
Receiver
Operating Instructions
STR-AV23
1991 by Sony Corporation
Connections
System Connections
Before connection, be sure to set the POWER switch to OFF.
LINE
OUT
Notes on system connection
• The red jacks of the receiver are for right-channel (R)
connections and the white jacks for left-channel (L).
• The cable connectors should be fully inserted into the jacks.
A loose connection may cause hum and noise.
to a wail outlet LINE IN
LINE
OUT
Connecting FM Antenna
For normal use
Supplied wired antenna
For higher quality sound
0»
75-ohm coaxial cable
(optional)
Connecting AM Antenna
to a wall outlet
Note on power source connection
e The plug of the AC power cord can only be inserted into a
polarized AC outlet.
a Do not connect an electrical home appliance such as an
electric iron, fan, TV, or other high-wattage equipment
exceeding 120, watts in total power consumption to the AC
OUTLET on the receiver.
AUDIO
LINE IN
AUDIO
LINE OUT
to a wall outlet
Connecting Antenna Ground
To prevent hum, connect the ground wire to ANTENNA
ground terminal (At). When an outdoor antenna is
installed, be sure to connect the ground wire for
lightning protection.
Connecting Speakers
Right Speaker
Left Speaker
Supplied loop
antenna
ilT
•j
Adjust the
^ direction.
f-
Speaker impedance and power capability
Use only the speakers having nominal impedance from 8 to 16
ohms, and adequate power handling capability.
Note
As the speakers A and B are connected in series, the sound
volume will be slightly decreased with both of the SPEAKERS
selectors deore.sseri.
L
Receiving FM/AM Broadcasts
How to receive a broadcast
When you know the
frequency
When you do not know
the frequency
Tuning in a preset
frequency
Direct Access Tuning
POWER — ON
Ip all
See "Direct Access Tuning".
FM: See "Automatic Tuning".
AM: See "Manual Tuning".
See "Preset Tuning".
4 2 3
I CTT 3
i 3
OD ®
Select
SPEAKERS '
A or B.
1 Press TUNER.
2 Select FM or AM. 3 Press DIRECT TUNING. 4 Press the appropriate numeric buttons to enter
the frequency. (See examples below.)
5 Adjust the volume.
Automatic Tuning (for FM reception)
Select SPEAKERS
A or B.
1 Press TUNER. 2 Select FM. 3 Press + or-TUNING.
When a station is received, automatic tuning stops
automatically. To change the station, press + or again.
4 Adjust the volume.
When sweeping does not stop at the desired station
The signal strength is weak. Tune in the station as described in
“Direct Access Tuning”.
Example 1: FM 108.00 MHz Example 2: AM 1350 kHz
For entering AM frequencies
You do not need to enter the last "0".
Correcting the entered frequency
Repeat the above steps from the beginning.
If the frequency figures flash in the display window
The entered number is outside the receiver's frequency range (FM
87.5 to 108 MHz; AM 530 to 1710 kHz).
Enter the correct frequency.
Manual Tuning (for AM reception)
Preset Tuning
POWER ON
□
tool I
Select SPEAKERS
A or B.
1
2 3 4
aE-jg
1 Press TUNER. 2 Select AM. 3 Press + or-TUNING.
Each time + or - is pressed, the frequency will
change by 10 kHz. To change the frequency
continuously, keep the button pressed.
4 Adjust the volume.
Quickly tuning in a roughly known frequency
Proceed as the following example.
Example: The station between AM 700 and AM 800 kHz.
AM DIRECT
cn-
'W'
no'r)'.
A total of 30 FM/AM stations can be memorized in any
desired sequence.
Select SPEAKERS A or B.
1 Tune in the desired station. (See "Automatic
Tuning", "Manual Tuning" or "Direct Access Tuning".)
2 Press SHIFT to select the memory page (A, B or
C).
3 Press MEMORY.
Memory indicator appears for a few seconds.
4 Press the desired numeric button (1 to 0), while
the MEMORY indicator is displayed.
Repeat above steps for presetting other desired stations.
kHz
4
kHz
4
kHz
Use of memory pages
The memory pages (A, B and C) can be used to classify stations
according to the music category, station band, etc.
Replacing a preset station
Preset another station on the number of the station to be replaced.
The previously preset station will be erased.
Tuning in a Preset Station
no n
lO U
4
kHz
Method A: Direct
1 Press TUNER. 2 Press SHIFT to select memory page (A, B or C). 3 Press the preset numeric button.
4 Adjust the volume.
Method B; Scan
1 Press TUNER.
2 Press + or-PRESET.
Each time you press + or -, the preset station of the next
higher or lower number is tuned in.
M
A1 T AO
+
----------+
» S"'
^ +
----------------
• If you keep pressing + or -, preset stations are
successively tuned in. Release the button when the
desired preset .station ic
►
CO ^ ^
Cl
~ BO
Listening to Program Sources Other than Broadcast
1 Select the program source.
Program sources
Phono record
Compact disc or other
program sources
Video programs
Tape programs
2 Start the program.
3 Adjust the volume.
Function
PHONO
CD
ViDEO
TAPE
Recording on an Audio Tape
Recording
Tape Dubbing
1 Select the desired program source.
For an FM/AM broadcast, tune in the desired station.
2 Set the tape deck in the recording mode.
3 Start the desired program source.
Note on recording
The settings of the VOLUME, TONE controls, DBFB, SURROUND
and MUTING do not have any effect on recording.
1 Insert the recorded tape into tape deck 2 and a blank
tape into tape deckt.
2 Press VIDEO.
3 Adjust the recording level of tape deck 1.
4 Start the playback of tape deck 2 and set the tape
deck 1 in the recording mode.
Dubbing will start.
1,4
Troubleshooting
Problem
STEREO indicator flickers or does not light up when FM
stereo programs are received.
The figures in the display window do not stop at the desired
station during automatic tuning.
Stations cannot be tuned in correctly when the numeric
button is pressed.
Audio is not heard.
One channel does not transmit audio, or the volume from the
left and right speakers is unbalanced.
There is an abrupt loss of sound from one or both of the
speakers. (This symptom may be caused when the
protection circuit inside the unit activates.)
Solution
• Check the FM antenna connection, and adjust the
antenna.
• Press FM MODE to disengage the stereo mode.
• Check the antenna connection and adjust the antenna
direction.
• Tune in the station using the direct access tuning.
• Memorize the frequency correctly.
• Check the speaker and program source connections.
• Check that the appropriate function selector is
depressed.
• Check that the appropriate SPEAKERS selector is
depressed. If the A and B selectors are both
depressed, check that both speaker systems are
properly connected.
• Adjust the BALANCE control.
• Check the speaker connections.
• Turn off the receiver, and check the speaker terminals
or speaker cord for a short.
Sound transmitted from the speaker is reversed.
Severe hum or noise is heard.
The [Pj (protection) alarm appears in the display window.
The unit cannot be controlled by the Remote Commander.
• Connect the speaker correctly.
• Use shielded connecting cords.
• Keep the audio components further away from the TV.
• Connect the ground wire to the ANTENNA ground
terminal.
• Clean any dirty plugs and jacks with a cloth lightly
moistened with alcohol.
• A serious trouble has occurred such as overheating or
short-circuiting. Refer servicing to qualified person.
• Correctly point the head of the commander toward the
unit. If there is any object between the unit and the
commander head, remove it.
Remote Commander RM-S103
m POWER button
[1] DBFB button
[3] TUNER PRESET +/- and SHIFT buttons
[S VOLUME +/- buttons
[5] SURROUND button
[H MUTING button
H] 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.
[S DECK B operation buttons (also for single tape
deck)
DECK B ◄/►: Select tape function and start tape
playback on deck B.
[U DECK A operation buttons
DECK A ◄/►: Select tape function and start tape
playback on deck A.
[li Function select buttons
Notes on the remote commander
For the functions other than the receiver’s own ones, the remote
commander is effective only with Sony components having a
remote sensor with a mark.
Loading the Remote Commander with Batteries
2 Two size "AA" (R6) batteries
Battery life
About half a year of normal operation can be expected when using the Sony SUM-3 (NS) batteries.
Caution
When the commander is not to be used for a long period of time, remove the batteries to avoid damage caused by battery leakage and
corrosion.
Location and Function of Controls
Q] POWER switch
SI SHIFT button
[2 Remote sensor
[4] Display window
H] BAND selectors
E TUNING +/- buttons
E] PRESET +/- buttons
[II FM MODE button
When an FM stereo program is noisy or hard to receive,
press this button. The STEREO indicator goes out (the
sound is heard in monaural, but the reoeption will be
improved). To return to the stereo mode, press again or
change the frequency.
m VOLUME control and indicator
m SPEAKERS selectors
Depress to select which speaker system to drive. For
both speaker systems, depress A and B.
qH Function selectors
in Numeric buttons
[m] tone controls
Turn the TREBLE control to adjust the high frequency
sound. Turn BASS control to adjust the iow frequency
sound.
H MEMORY button
m BALANCE control
Adjust to correot stereo imaging, when the speaker
position is not symmetrical.
DU DIRECT TUNING button
Ol DBFB (Dynamic Bass Feed Back) button and
indicator
To reinforce the bass frequency sound, press this
• button.
on MUTING button and indicator
Press to attenuate the sound level immediately (-20 dB
attenuation). Pressing this button makes the indicator
be lighted. To restore the sound level, press again.
M HEADPHONES jack (stereo phone jack)
Connect the headphones to this jack for private
listening.
SURROUND button and indicator
To obtain the surround effect, press this button.
Oh safety
• Operate the unit only on 120 V AC, 60 Hz.
• Should any solid object or liquid fall into the unit, unplug
it 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 installation
• Do not Install the unit in a location near heat sources
such as radiators or air ducts, or in a place subject to
direct sunlight, excessive dust, mechanical vibration or
shock.
• Good air circulation is essential to prevent internal heat
buildup in the unit. Place the unit in a location with
adequate air circulation. Do not place the unit on a soft
surface, such as a rug that would block the ventilation
holes on the bottom.
• Do not place anything on top of the cabinet. The top
ventilation holes must be unobstructed for the proper
operation of the unit and to prolong the life of its
components.
The STR-AV23 is a combined receiver and audio/video
control center.
You can listen to various audio/video program sources
through the amplifier of the receiver and the speakers
connected to it. Newly designed DBFS (Dynamic Bass
Feed Back) circuitry ensures natural sound quality even at
a low volume level.
Built-in matrix surround decodes ambient information in
stereo sources, providing a surround sound effect.
In the tuner section, a quartz locked digital synthesizer
system allows precise tuning. A total of 30 FM/AM stations
can be preset in 3 memory pages (A, B and C).
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.
On repacking
Do not throw away the carton and the packing material. It
makes an ideal container to transport the unit in.
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.
Warning
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.
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 belovi/. Refer to these numbers whenever
you call upon your Sony dealer regarding this product.
Model No^
Serial No^
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.
Specifications
Audio Power Specifications
POWER OUTPUT AND TOTAL HARMONIC DISTORTION
With 8-ohm load, both channels driven, from 40 - 20
kHz, rated 40 watts per channei minimum RMS power,
with less than 0.8% total harmonic distortion from 250
milliwatts to rated output.
Other Specifications
Amplifier section
Continuous RMS power output (8 ohms, at 1 kHz less than
0.8% total harmonic distortion)
50 W + 50 W
Dynamic power (at 1 kHz IHF)
55 W + 55 W (8 ohms)
60 W + 60 W{4 ohms)
Harmonic distortion
Less than 0.8% at rated output
Frequency response
PHONO: RIAA equalization curve ±0.5 dB
CD
VIDEO
TAPE
Inputs
Sensitivity
PHONO 2.5 mV 50 kilohms 74 dB
CD
VIDEO
TAPE
Outputs
REC OUT, VIDEO
(AUDIO) OUT
SPEAKER A, B Accepts speakers of
HEADPHONES Accepts low and high
Tone controls
BASS; ±10 dB at 100 Hz
TREBLE; ±10 dB at 10 kHz
Muting
-20 dB
DBFB
+ 12 dB at 70 Hz
150 mV 50 kilohms
10 Hz
■ 50 kHz " ° dB
Impedance
Voltage 150 mV
Impedance 10 kilohms
8-16 ohms
impedance headphones
S/N (weighting
network, input level)
72 dB* (A, 2.5 mV)
95 dB
80 dB* (A. 150 mV)
78 IHF
Tuner section
FM tuner section
Tuning range
Antenna
terminals
Sensitivity at
50 dB
quieting
Usable
sensitivity
Signal-tonoise ratio
Harmonic
distortion
Selectivity
Separation 45 dB at 1 kHz
Frequency
response
87.5 — 108 MHz
300 ohms,balanced
75 ohms, unbalanced
18.3 dBf, 4.5 (iV
(mono)
38.3 dBf, 45 H.V
(stereo)
11.2 dBf, 2 nV (IHF)
76 dB (mono)
70 dB (stereo)
0.3% (mono), 0.5%
(stereo) at 1 kHz
60 dB at 400 kHz
30 Hz —15 kHz
dB
AM tuner section
530 — 1710 kHz
External antenna
terminal
—
Loop antenna:
500 trV (at 1,000 kHz)
54 dB (at 50 mV/m)
0.5% (at 50 mV/m,
400 Hz)
40dBat 10 kHz
—
—
General
System
Tuner section: PLL quartz-locked digital
synthesizer system
Preamplifier section; low-noise NF type equalizer amp
Power amplifier section: quasi-complementary SEPP
Power requirements
120 VAC, 60 Hz
Power consumption
90 W
In standby condition: 5 W
AC outlets
One switched (120 W/1A Max.)
Dimensions
Approx. 430 X 122.5 x 300 mm (w/h/d)
(17 X 4 7g X 11 Vg inches)
including projecting parts and controls
Weight
Approx. 6.5 kg (14 lb 5 oz)
Accessories supplied
FM wire antenna (1)
AM loop antenna (1)
Remote Commander RM-S103 (1)
Sony batteries SUM 3(NS) (2)
Design and specifications subject to change without notice.
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