Sony TA-AX390 User manual

SONY
3-750-168-21 (1)
negated stereo Amplifier
Operating Instructions
Before operating the unit, please read this manual thoroughly
and retain it for future reference.
Owner’s Record
The model and serial numbers are located at the rear.
Record these numbers in the spaces provided below. Refer
to them whenever you call upon your Sony dealer regarding
this product.
Model No.
To prevent fire or shock hazard, do not ex-
‘pose the unit to rain or moisture.
Serial No.
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 prod-
uct’s enclosure that may be of suffi-
cient magnitude to constitute a risk of
electric shock to persons.
This symbol is intended to alert the
user to the presence of important
operating and maintenance (servicing)
instructions in the literature accompa-
nying the appliance.
© 1989 by Sony Corporation
Precautions
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 wail 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.
On installation
e Place the unit on a level surface.
¢ Do not install the unit near heat sources such as radiators
or air ducts, or in a place subject to direct sunlight,
excessive dust, mechanical vibration or shock.
e Good ventilation is essential to prevent internal heat build-
up in the unit. Place the unit in a location with adequate air
circulation. Do not place the unit on a soft surface.
On cleaning
Clean the cabinet periodically with a soft dry cloth. If the
stains are difficult to remove, use a cloth moistened with a
mild detergent solution. Do not use solvents such as alcohol,
benzine or thinner, since they will damage the finish.
On repacking
Do not throw away the carton and packing materials. It
makes an ideal container in which to transport the unit.
If you have any questions or problems concerning your unit
that is not covered in this manual, please consult your
nearest Sony dealer.
For detailed precautions, see the leaflet “IMPORTANT
SAFEGUARDS”.

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(1]| SYSTEM POWER switch
[2] 5 BAND Spectrum analyzer display
[3]5
BAND
GRAPHIC
EQUALIZER
controls
[4]
VOLUME
control
[5] SPEAKERS setector
{6}
HEADPHONES
jack
(stereo
phone
jack)
[7] Remote control sensor
Function selectors
($]
DBFB
(Dynamic
Bass
Feedback)
switch
and
indicator
BALANCE
control

ote commander (supplied with the TA-AX390)
DBFB button
Function selectors
Tape deck (B) pause button
TUNER PRESET buttons
POWER switch
[16] CD player operation buttons
[17] VOL (volume) contro! buttons
SISiS\EI
—
A 2)
I
= a
+
For customers of the TA-AX391
For information concerning the remote commander, see
the enclosed leaflet.
Installing Batteries
Battery life
About half a year of normal operation can be expected when using
the Sony SUM-3(NS) batteries.
When the batteries are exhausted, the remote commander can no
longer operate the unit. If this happens, replace both batteries
with new ones.
To avoid battery leakage
When the commander is not to be used for a long time, remove the
batteries to avoid damage caused by battery leakage and
corrosion.

Listening to a Program Source
Select the
speaker system.
|
SPEAKERS |
SYSTEM
POWER FF, A 3
A+B,
Selecting the speaker system
To drive speaker system A: Set SPEAKERS to “A”.
To drive speaker system B: Set SPEAKERS to “‘B”.
To drive both speakers: Set SPEAKERS to “A+B”.
For headphone fistening only: Set SPEAKERS to “OFF”.
When SPEAKERS is set to “A+B”, two pairs of speaker system
must be connected. Otherwise, no sound can be heard.
_
You
can
record
any
program
source
using
a
tape
deck
connected
to
the
TAPE
jacks.
Tape
a(cerelfeliare
The
BALANCE,
VOLUME,
GRAPHIC
EQUALIZER
controls
and
the
DBFB
switch
have
no
effect
on
recor
Select the program source other than TAPE.
SYSTEM
POWER > ON
FUNCTION——_____._—__», 3
— = -
VIDEO

3 Select the program source.
nt
FUNCTION
VOLUME
[ new} ~ Ls] 3 oa
Play the program
source.
Selecting the program source
For arecord program, press PHONO.
For a tuner program, press TUNER.
For aCD program, press CD.
For a tape program, press TAPE.
For a video sound program, press VIDEO.
Play the program source. Set the tape deck in the recording mode.

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¢ Connect the AC power cord last. Make sure power is off.
* Cord plugs and jacks are color coded. Red plugs and jacks are for right channel (R) and white ones for left channel (L).
© The cable connectors should be fully inserted into the jacks. A loose connection may cause hum and noise.
Note on speaker impedance and power capacity
This amplifier is designed to work best with speakers of nominal
impedance from 8 to 16 ohms. Be sure to use a speaker system
with adequate power handling capabilities.
(CONTROL S OUT
To connect a video tape recorder
Use the following cables.
For stereo video tape recorder
phono plug x 2—phono plug x 2
For monaural video tape recorder
mini plug x 1—phono plug x 2
phono plug x 1— phono plug x 2

@ Speaker cords
@ CONTROL S connector (4-pin)
Connect to the CONTROL S$ IN connector of other
Sony equipment with the 4-pin flat remote control cord
for whole audio system remote control.
© SYSTEM CONTROL connector (3-pin)
Connect to the SYSTEM CONTROL connector of the
Sony TC-W390 tape deck with the 3-pin flat system
control cord for remote control.
@ AC OUTLETS
These are used to power other audio components
whose power consumption is less than the wattage
indicated on the AC outlets.
SWITCHED: These outlets are controlled by the
POWER switch.
CAUTION: Do not connect any electrical home
appliances such as an electric iron, fan, TV or other
high wattage equipment to these AC outlets.
@ Power cord
Connect to a wall outlet.
Adjusting the Audio
The following operations apply only to reproduced sound.
Volume Adjustment
To increase the sound level turn the VOLUME clockwise.
To decrease it turn the control counterclockwise.
Sound Quality Adjustment
To reinforce bass
Press the DBFB (Dynamic Bass Feedback) switch to ON.
The lower the sound level is, the more the bass is
emphasized.
To adjust tone quality
Adjust the 5 BAND GRAPHIC EQUALIZER controls
according to:
¢ Personal preference.
¢ The room acoustics. For instance, playback in a room with
padded walls or furniture will probably sound better with
the high frequencies boosted.
¢ Program quality. If reproduction contains hiss, cutting the
higher frequencies will improve playback.
Function of graphic equalizer controls
100 Hz: Boosts or cuts bass.
330 Hz: Adjusts the power, spaciousness and warmth of the
sound.
1kHz: Provides more presence for vocals.
3.3 kHz: Boosts a brighter sound or reduces stridency.
10 kHz: Highlights the delicate quality of instrumental
sound.
Balance Adjustment
To change the relative strength of the right and left speaker
outputs, adjust the BALANCE control.
For personal listening
Connect headphones to HEADPHONES.
If howling occurs while listening to a record
Switch off DBFB. Then turn down the volume and 100 Hz controls until
howling stops. Howling occurs when the vibrations of the boosted bass are
picked up by the stylus, and reproduced once again.

Troubleshooting Guide
Before going through the check list below, first refer back to the connection and operating procedures.
Should any problem persist after you have made these checks, consult your nearest Sony dealer.
No audio
Cas audio from one channel
Lack of bass sound or obscure instrument position
e Check the power cord connection.
e Check the SPEAKERS selector setting.
© Check the connections.
¢ Check the setting of the function selector.
¢ Check the speaker terminal connection and the speaker cord
for a short.
¢ Adjust the BALANCE control.
¢ Check the speaker cord or connecting cord connection.
¢ Check the connection between the amplifier and speakers.
Severe hum or noise when using the turntable
Noise when TV is turned on
Switching on DBFB does not affect the sound
¢ Ground the turntable system.
¢ Fully insert the plug of the connecting cord.
¢ Disconnect the ground wire of the turntable from the terminal
when using an MM cartridge with a ground piece.
e Move the TV away from the audio system.
¢ DBFB reinforces only low frequencies at low sound levels.
Specifications
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL HARMONIC
DISTORTION:
With 8 ohm loads both channels driven,
from 20 — 20,000 Hz; rated 135 watts per
channel minimum RMS power, with no
more than 0.9% total harmonic distortion
from 250 milliwatts to rated output.
Amplifier section
Power bandwidth (IHF) 30 Hz - 30 kHz (8 ohms, 65 watts)
Dynamic headroom 1.7 dB (78 IHF)
Harmonic distortion Less than 0.9% at rated output
Frequency response PHONO: RIAA equalization curve
TUNER, CD, VIDEO, TAPE: 30 Hz - 30 kHz +3 dB
Damping factor 27 (8 ohms, 1 kHz)
input
S/N (weighting
network, input
level)
71 dB
50kilohms | 75dB*
(A, 3.0 mV)
92 dB
50 kilohms 83 dB*
(A, 250 mV)
Jack
type
Input jack Sensitivity Impedance
*°78 IHF
Output
REC OUT Phono jacks | Voltage 150 mV
Impedance 1 kilohm
SPEAKERS |— _| Accepts speakers of 8 - 16 ohms.
HEADPHONES Stereo phone | Accepts low and high impedance
jack headphones.
GRAPHIC EQUALIZER controls
Boost/cut range: +8 dB (100 Hz, 330 Hz,
1 kHz, 3.3 KHz)
: +6 dB (10 KHz)
General
System Preamplifier: Low-noise, high-gain equalizer
amplifier
Power amplifier: Pure-complementary SEPP
OCL power amplifier with all stages
directly coupled
Power requirements 120 V AC, 60 Hz
Power consumption 235 W
AC outlets 3 switched, total 100 watts max.
Dimensions Approx. 430 x 130 x 355 mm (w/h/d)
(17 x 54s x 14 inches)
Weight Approx. 8.5 kg (18 Ib 12 02)
Supplied accessory Remote commander (1)
(TA-AX390: RM-S390, TA-AX391: RM-P202)
Design and specifications subject to change without notice.
Sony Corporation Printed in Korea