Luxman L-507U User Manual
Owner`s Manual
INTEGRATED AMPLIFIER
L-507u
Contents
Precautions ············································································································· 1
Names and Functions ······························································································ 2
Connections ············································································································ 8
Operations ············································································································· 12
How to Use Remote Control ·················································································· 14
Block Diagram ······································································································· 15
Specifications ········································································································ 16
Before Asking for Repair Services ·········································································· 17
INTEGRATED AMPLIFIER L-507u
Precautions
* Note
Wall
* *
*
Installation place
This unit shall be installed in a well�ventilated and effectively
heat�released place.
Especially, installation of this unit where 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.
Ventilation holes
If the amplifier is installed on a rack or the like, secure ample
space for cooling and leave the door open. Do not pile up
other things on the amplifier and never put articles on it. This
can cause malfunctioning.
Note:
For heat dispersal, do not install this equipment in a confined
space such as a book case or similar unit.
Cautions in connecting speakers
When making speaker system connections, exercise extra
care not to short�circuit between ! and @ of the speaker
terminals and speaker input terminals of this product. If a
large signal is applied to the amplifier with its circuit left short�
circuited, a large current may be passed through the output
circuit and cause a malfunction.
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 gener�
ated shortly after the power supply is turned on. If the volume
control is moved to a high sound level before the time mut�
ing circuit is canceled, a large sound is suddenly generated.
Please be advised that the volume control shall be set to a
low level at first and adjusted after sound comes out of the
speakers.
Protection circuit
This product is equipped with the protection circuit that is
activated upon detection of overcurrent, abnormally high
temperature, and DC drift to protect the amplifier and speak�
ers. When the protection circuit is activated, the output to the
speaker terminal is shut off and the standby indicator blinks to
show that this product is in the muting state. If the protection
circuit is frequently activated after a lapse of a certain time
and turning on the power again, please consult your dealer.
Precautions in connecting with other
components
When connecting this product to input devices such as a CD
player, a Super Audio CD player, a tuner, and a recorder, be
sure to turn off the power of this product and all other con�
nected devices. Failure to observe this may generate a strong
noise resulting in speaker damage or cause a malfunction.
The pin�plug to be inserted in each input terminal of this prod�
uct shall be pushed in firmly. If the grounding terminal is inad�
equately connected, noises including hum may be generated,
resulting in an adverse S/N ratio.
Batteries
Caution:
Batteries used for remote controller shall not be exposed to
excessive heat such as sunshine, fire or the like.
Repair and adjustments
When repairs or adjustments are needed, please ask your
dealer where you bought the product.
Cleaning
For cleaning, use a piece of soft cloth to wipe the product
such as cleaning cloth available on the market. If the prod�
uct has become remarkably dirty, remove the dirt with soft
cloth absorbing a small amount of neutral detergent, and then
wipe the unit with dry cloth.Do not use a solvent like benzine
or thinner because such a substance can often damage the
exterior.
1
Names and Functions
11121314151617181920
5 7 8 9
106 71 2 43
Front side of main unit
1. Operation switch (stand by/on)
This switch turns the power supply ON/OFF.
When wiring or connection is performed, be sure to turn off
this switch.
2. Operation indicator (OPERATION)
Blinks in the time muting mode when the operation switch
is turned on and lights up when the operation state is ac�
tivated afterward. This indicator blinks when the unit is in
the muting mode or when the volume is adjusted with the
remote control.
3. Input selector (INPUT SELECTOR)
Selects an input device from the devices such as a CD play�
er, a Super Audio CD player and a tuner connected to each
input terminal.
The input selector has 8 positions consisting of bal.line�2,
line�4, line�3, line�2, line�1, rec�1, rec�2, and phono that
correspond to each input terminal on the rear panel. The
knob is rotated to light the input indicator of the input device
to be selected.
4. Input indicator
Lights up at the input device to be selected with the input
selector or remote control.
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INTEGRATED AMPLIFIER L-507u
5. Phono MC cartridge on/off switch
(phono MC)
Changes the gain level of the equalizer amplifier (amplifier
circuit required to play an analog record).
MC: ON is selected by pressing this switch when MC
(moving coil) type cartridge of low output voltage
is used.
Be aware that the sound volume becomes higher
and unbalanced sound without high frequencies
is generated owing to the impedance when “MC”
is selected during use of the MM type cartridge.
MM: OFF is selected when MM (moving magnet) type
cartridge of high output voltage is used.
6. LINE-2 unbalance/balance selector
(bal. line-1)
Toggles between the unbalance input terminal (LINE�2) and
balance input terminal (BALANCED LINE�1) when the input
selector is set to the line�2 position.
: BALANCED LINE�1 is selected.
: LINE�2 is selected.
7. Power meters
The left meter reads the output of the L channel, and the
right meter reads the output of the R channel.
The meters read the level in decibels.
The meters light when the power is on.
8. Remote sensor (remote sensor)
Receive signals from the accessory remote control.
9. Standby indicator (stand by)
Lights when the AC plug is plugged into a wall socket and
the operation switch is set to off.
This indicator turns off when the AC plug is disconnected
from the wall socket or the operation switch is set to on. This
indicator blinks when the protection circuit is activated.
10. Volume control (VOLUME CONTROL)
Adjust the sound volume. Sound is not generated when this
control is rotated counterclockwise to the end, and then,
the sound volume gradually becomes higher when the con�
trol is slowly rotated clockwise.
3
Names and Functions
11121314151617181920
5 7 8 9
106 71 2 43
Front side of main unit
11. Separate switch (separate)
Separates the pre�amplifier and main�amplifier each other.
OFF: Uses this unit as a normal pre�main amplifier.
ON: Feeds external signals from the MAIN IN terminal
on the rear panel to the main�amplifier section.
When the separate switch is set to on, the volume control
of this unit cannot adjust the volume of the speakers con-
nected to this unit. Volume adjustment shall be performed
at the input device side such as the control amplifier con-
nected to the MAIN IN terminal.
Entry of direct output into the MAIN IN terminal from a CD
player or other devices that cannot adjust sound volume
constantly provides a full power state and accordingly re-
sults in the risk of speaker damage.
For such input devices, be sure to use a control ampli-
fier equipped with sound volume adjustment function as
a relay, generate sound through the speakers with volume
lowered, and adjust the volume to your favorite level.
12. Subsonic (subsonic)
Cuts ultra�low frequencies out of audible range to pre�
vent ultra�low range noise from adversely affecting audible
range.
This function is significantly effective especially when a re�
cord is warped or a woofer is shaking owing to ultra�low
range vibration.
OFF: Subsonic off
ON: Subsonic on
13. Line straight (line straight)
Enhances the purity of the sound quality by bypassing the
balance control circuit, tone control circuit, or the like.
OFF: Line straight off/bypass off
ON: Line straight on/bypass on
When the line straight switch is set to on, the balance con-
trol and tone control cannot be adjusted and the mode se-
lector does not function.
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