Luxman E-250 User Manual
PHONO AMPLIFIER
E-250
Owner`s Manual
Contents
Precautions ············································································································· 1
Features of This Unit ································································································ 2
Names and Functions ······························································································ 4
Connections ············································································································ 8
Block Diagram ······································································································· 10
Specifications ········································································································ 11
Before Asking for Repair Services ·········································································· 12
PHONO AMPLIFIER E-250
Precautions
Installation place
Install this unit in a location where good ventilation and heat
radiation are assured.
Especially, the installation of this unit where the direct sunlight
is present, where the temperature rises excessively high such
as close to a heater, or where it is humid or dusty may cause
a malfunction even if heat is efficiently released. Therefore, do
not install this unit in such places.
Note:
For heat dispersal, do not install this equipment in a confined
space such as a book case or similar unit.
* Note
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Wall
Cautions in connecting cartridges
Connect an analog player or a tone arm with the ground ter-
minal of this unit. If the grounding terminal is inadequately
connected, noises including hum may be generated, resulting
in an adverse effect on the S/N ratio.
The pin plugs to be inserted in the input terminals of this unit
shall be pushed in firmly. If the grounding of the terminal is
inadequately connected, noises including hum may be gener-
ated, resulting in an adverse effect on the S/N ratio.
The sound is not generated shortly after
the power supply is turned on.
This amplifier is equipped with a time muting circuit in order to
separate the output circuit. Therefore, no sound is generated
shortly after the power supply is turned on.
If the volume control is set to a high sound level before the
time muting circuit is canceled, a large sound will suddenly be
generated. Please be advised that the volume control shall be
set to a low level at first and adjusted after the sound comes
out of the speakers.
Repair and adjustment
When repairs and adjustments are needed, please consult
with the dealer you bought the unit from.
Cleaning
For cleaning, use a piece of soft cloth to wipe the unit such as
cleaning cloth. When the dirt is hard to remove, use a small
amount of neutral detergent to wipe, and then wipe the unit
with dry cloth. Do not use a solvent like benzine or thinner
because such substances can often damage the exterior.
Precautions in connecting with other
components
When connecting this unit to output device, be sure to turn
off the power switch of this unit and all other connected units.
Failure to observe this may generate a strong noise resulting
in speaker damage or cause a malfunction.
The pin-plugs to be inserted in the input and output terminals
of this unit shall be pushed in firmly. If the grounding termi-
nal is inadequately connected, noises including hum may be
generated, resulting in an adverse effect on the S/N ratio.
1
Features of This Unit
Outline
This unit is an NF type phono equalizer amplifier supporting
MM/MC cartridges.
Specially selected MC transformer
Two pieces of step-up transformers in which a super permal-
loy core is independently used are mounted. Independence
between left and right channels has achieved richly expres-
sive sound that can be produced only by boosting with a
transformer.
Setting of cartridge load impedance
The load resistance setting function with 4 positions supports
a wide variety of cartridges.
Setting of cartridge load capacity
The load capacity setting function with 4 positions supports
a wide variety of cartridges. Change in high-frequency char-
acteristics allows sound to be adjusted to your favorite tone
quality.
Improvement in S/N ratio
Noise reduction has been achieved by the 2-parallized first
stage of FET, and improvement in the S/N ratio has been
achieved by optimization of ground pattern and ground point.
Selector relays
The selector relays of the high sound quality which are
mounted in the important points of LUXMAN amplifiers also
are mounted.
High-inertia power supply
The high-inertia power supply circuit on which a large-capac-
ity capacitor blocks were combined.
Schottky barrier diode
Schottky barrier diodes that have less switching noises and
higher conversion efficiency to the DC voltage is applied for
the power supply rectifier circuit.
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PHONO AMPLIFIER E-250
Articulation function
Magnetization of the cartridge or MC transformer that may
cause the deterioration of sound quality can be eliminated
with the use of reproduced sound signals. This function can
exploit the full potential of cartridges and achieve the sound
quality with a sense of openness.
Low cut switch
A low-cut filter is provided to restrain woofer fluctuation gen-
erated due to warped analog records.
Stereo/Monaural
The monaural switch which is useful for playing monaural re-
cords.
Input/output terminals
18 mm pitch RCA input/output terminals allow even high-per-
formance line cables with large plugs to be connected.
Compact chassis design
Compact body design (W 364 mm x D 274 mm)
LUXMAN’s original OFC wires
Original OFC wires are used in the internal shielded wires to
achieve smooth and natural signal transmissions thanks to
the spiral wrap shielding on each core and the non-plating
process on the core wire.
AC inlet
This inlet enables the connection with an external power ca-
ble.
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