Precautions - Luxman P-750u Owner's Manual

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.
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Precautions in connecting with input
devices
When connecting this product to input devices such as a CD
player, be sure to turn off the operation switches of this prod-
uct and all other connected devices. Failure to observe this
may generate a large noise and accordingly cause hearing
impairment. The RCA plugs connecting input devices should
be firmly pushed into the input terminals. Likewise, firmly push
connectors into the output terminals of any input device, such
as a CD player. Inadequately connections may compromise
grounding and lead to noise and hum and seriously affect the
S/N ratio.
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Note
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Wall
Protection circuit
This product is equipped with a protection circuit that is ac-
tivated upon the detection of overcurrent, abnormally high
temperature, and DC output to protect the amplifier and
headphones. When the protection circuit is activated, the
output to the headphones is shut off and the operation indi-
cator blinks to show that this unit is in the muting state. When
the cause to activate the protection circuit is eliminated, the
blue operation indicator light comes back on and the operat-
ing state resumes. If the protection circuit is frequently acti-
vated after a lapse of a certain time and turning on the power
again, please consult your dealer.
Timed mute circuit
This product is equipped with a timed mute circuit to delay
the output to connected headphones. No sound will be gen-
erated immediately after turning on the power.
ATTENTION: increasing the output volume or input volume
from a connected device while the unit is muted may result
in damage to headphones. With the output level set to a low
level, wait a short time for mute cancelation and then increase
the output level slowly to the desired listening volume.
Connecting / Disconnecting headphones
Connecting or disconnecting an unbalanced headphone jack
causes a brief short circuit between the left and right chan-
nels. This is due to the structure of the unbalanced head-
phone socket. If the volume of this unit is turned up at this
time, a short circuit will be detected and the over-current de-
tection circuit in the headphone amplifier output stage will be
activated, causing the unit to go into a muted state or may
even lead to a malfunction.
ATTENTION: plugging or unplugging headphones should be
done with the output volume set to zero and when there is no
input signal from connected input devices.