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Precautions
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.
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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.
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Note
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Wall
INTEGRATED AMPLIFIER L-507u
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.
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.
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