Sony SEQ-421 User manual

SONY
Graphic Equalizer
SEQ-421
3-754-982-21(1)
ed asters Len ele) ars
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 the serial number in the space provided below.
Refer to them whenever you call upon your Sony dealer
regarding this product.
Model No. SEQ-421
To prevent fire or shock hazard, do not
expose the unit to rain or moisture.
Oy NGAEIO]N
JN AN
DO NOT OPEN
CAUTION: TO REOUCE THE RISK OF ELECTRIC SHOCK,
Serial No.
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.
* The graphical symbols are on the rear enclosure.
On safety
¢ Operate the unit only on 120 V AC, 60 Hz.
¢ The unit is not disconnected from the AC power source
as long as it is connected to the wall outlet, even if the
unit itself has been turned off.
© Should any solid object or liquid fall into the unit, unplug
it and have it checked by qualified personnel before
operating it any further.
e 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
© 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.
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 the customers in the U.S.A.
For detailed precautions, see the leaflet “IMPORTANT
SAFEGUARD".
If you have any question or problem concerning your unit,
please consult your nearest Sony dealer.
For the customers in Canada
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.

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Frequency Coverage of
Specifications
sre (e1 Ml ate [0 l-11742) mm Ore) aiege)|
Adjustable frequency bands and the effect of level
adjustment
60 Hz: Lowering the level will cut the ventilation noise of a
music hall, hurn of electronic instruments, boomy
bass, etc. Raising the level will reinforce the
heavy bass part of a pipe organ or add depth to
the bass sound.
150 Hz: Boosting or cutting the normal bass.
400 Hz:increasing or decreasing the power, spaciousness
and warmth of the sound.
1 kHz: Providing more presence for vocals, and moving
the sound forward or into the background.
2.4 kHz: Lowering the level will reduce stridency, and
saising will make the base sound brighter.
6 kHz: Increasing or decreasing the brightness of the
sound; for example, raising the level will make the
violin sound silky smooth.
14 kHz: Changing the general atmosphere rather than the
sound itself. Raising the level will highlight the
delicate quality of instrumental sound, and
lowering will reduce high-frequency noise such as
the resonant peak of a cartridge tape hiss, etc.
Checking the equalization results
Press the EQUALIZATION button again to off (released
position).
The equalizer circuit is bypassed, and you can hear the
sound without equalization.
By switching the EQUALIZATION button on and off,
compare the results.
The spectrum analyzer can be used to visually confirm the
need for and effect of equalizer adjustment.
Bicel'le)(=t-Jaleleltrare
Inputs LINE IN: Phono jacks, 245 mV (-10 dBs),
50 kilohms
TAPE IN: Phono jacks, 245 mV (-10 dBs),
50 kilohms
Outputs LINE OUT: Phono jacks,
245 mV (-10 GBs),
Load impedance: more than 10 kilohms
TAPE REC OUT: Phono jacks,
245 mV (-10 GBs),
Load impedance: more than 10 kilohms
Graphic equalizer
Boost/cut range: + 10 dB
Center frequencies: 60 Hz, 150 Hz,
400 Hz, 1 kHz, 2.4 kHz, 6 kHz, 14 kHz
Frequency response (with EQUALIZATION on)
LINE IN: 20 Hz to 40 kHz :?,dB
Harmonic distortion
LINE IN: Less than 0.008%
(at 1 kHz, 1 V output)
Signal-to-noise ratio (with EQUALIZATION on)
LINE IN: Better than 100 dB
(A network, 1 V output)
Power requirements
120 V AC, 60 Hz
Power consumption
5W
AC outlet 1 unswitched, 120 W/1 A max.
Dimensions Approx. 430 x 80 x 265 mm (w/h/d)
(17x 3 /, x 10 '/, inches)
Weight Approx. 2.5 kg (5 Ib 8 oz)
Accessory supplied
Audio connecting cords (2)
Design and specifications are subject to change without
notice.
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 even when the POWER switch is
turned on.
No equalization.
off).
Sony Corporation Printed in Japan
© Check if the power cord is disconnected.
¢ Check if the connecting cord is disconnected.
¢ Check the TAPE button setting.
¢ Check if the EQUALIZATION button is set to off (the indicator goes
¢ Check the connections.
The
program
source
connected
to
the
amplifier
|
¢
Check
if
the
TAPE
button
is
set
to
on
(the
indicator
lights
up).
cannot
be recorded.