Roland 5100011346 -01 用户手册
7
IMPORTANT NOTES
Power Supply: Use of Batteries
301
● Do not connect this unit to same electrical outlet that is being
used by an electrical appliance that is controlled by an
inverter (such as a refrigerator, washing machine, microwave
oven, or air conditioner), or that contains a motor. Depending
on the way in which the electrical appliance is used, power
supply noise may cause this unit to malfunction or may
produce audible noise. If it is not practical to use a separate
electrical outlet, connect a power supply noise filter between
this unit and the electrical outlet.
inverter (such as a refrigerator, washing machine, microwave
oven, or air conditioner), or that contains a motor. Depending
on the way in which the electrical appliance is used, power
supply noise may cause this unit to malfunction or may
produce audible noise. If it is not practical to use a separate
electrical outlet, connect a power supply noise filter between
this unit and the electrical outlet.
302
● The AC adaptor will begin to generate heat after long hours of
consecutive use. This is normal, and is not a cause for concern.
304a
● When installing or replacing batteries, always turn off the
power on this unit and disconnect any other devices you may
have connected. This way, you can prevent malfunction and/
or damage to speakers or other devices.
have connected. This way, you can prevent malfunction and/
or damage to speakers or other devices.
307
● Before connecting this unit to other devices, turn off the
power to all units. This will help prevent malfunctions and/or
damage to speakers or other devices.
damage to speakers or other devices.
Placement
351
● Using the unit near power amplifiers (or other equipment
containing large power transformers) may induce hum. To
alleviate the problem, change the orientation of this unit; or
move it farther away from the source of interference.
alleviate the problem, change the orientation of this unit; or
move it farther away from the source of interference.
352a
● This device may interfere with radio and television reception.
Do not use this device in the vicinity of such receivers.
352b
● Noise may be produced if wireless communications devices,
such as cell phones, are operated in the vicinity of this unit.
Such noise could occur when receiving or initiating a call, or
while conversing. Should you experience such problems, you
should relocate such wireless devices so they are at a greater
distance from this unit, or switch them off.
Such noise could occur when receiving or initiating a call, or
while conversing. Should you experience such problems, you
should relocate such wireless devices so they are at a greater
distance from this unit, or switch them off.
354a
● Do not expose the unit to direct sunlight, place it near devices
that radiate heat, leave it inside an enclosed vehicle, or
otherwise subject it to temperature extremes. Excessive heat
can deform or discolor the unit.
otherwise subject it to temperature extremes. Excessive heat
can deform or discolor the unit.
355b
● When moved from one location to another where the
temperature and/or humidity is very different, water droplets
(condensation) may form inside the unit. Damage or
malfunction may result if you attempt to use the unit in this
condition. Therefore, before using the unit, you must allow it
to stand for several hours, until the condensation has
completely evaporated.
(condensation) may form inside the unit. Damage or
malfunction may result if you attempt to use the unit in this
condition. Therefore, before using the unit, you must allow it
to stand for several hours, until the condensation has
completely evaporated.
360
● Depending on the material and temperature of the surface on
which you place the unit, its rubber feet may discolor or mar
the surface.
You can place a piece of felt or cloth under the rubber feet to
prevent this from happening. If you do so, please make sure
that the unit will not slip or move accidentally.
the surface.
You can place a piece of felt or cloth under the rubber feet to
prevent this from happening. If you do so, please make sure
that the unit will not slip or move accidentally.
Maintenance
401a
● For everyday cleaning, use a soft, dry cloth (such as those used
to clean eyeglasses) to wipe the unit clean. If dust or dirt has
settled on the surface, we recommend that you gently dust off
the unit before you wipe it, since dust particles can act like an
abrasive and scratch the unit‘s surface if you wipe it without
clearing away the dust first. For stubborn dirt, use a cloth
dampened with mild detergent. Note that some detergents
may contain solvents; make sure that the detergent you use
does not contain a solvent.
settled on the surface, we recommend that you gently dust off
the unit before you wipe it, since dust particles can act like an
abrasive and scratch the unit‘s surface if you wipe it without
clearing away the dust first. For stubborn dirt, use a cloth
dampened with mild detergent. Note that some detergents
may contain solvents; make sure that the detergent you use
does not contain a solvent.
402
● Never use benzine, thinners, alcohol or solvents of any kind, to
avoid the possibility of discoloration and/or deformation.
Repairs and Data
452
● Please be aware that all data contained in the unit’s memory
may be lost when the unit is sent for repairs. Important data
should always be backed up on a USB memory, or written
down on paper (when possible). During repairs, due care is
taken to avoid the loss of data. However, in certain cases (such
as when circuitry related to memory itself is out of order), we
regret that it may not be possible to restore the data, and
Roland assumes no liability concerning such loss of data.
should always be backed up on a USB memory, or written
down on paper (when possible). During repairs, due care is
taken to avoid the loss of data. However, in certain cases (such
as when circuitry related to memory itself is out of order), we
regret that it may not be possible to restore the data, and
Roland assumes no liability concerning such loss of data.
Additional Precautions
551
● Please be aware that the contents of memory can be
irretrievably lost as a result of a malfunction, or the improper
operation of the unit. To protect yourself against the risk of
loosing important data, we recommend that you periodically
save a backup copy of important data you have stored in the
unit’s memory on a USB memory.
operation of the unit. To protect yourself against the risk of
loosing important data, we recommend that you periodically
save a backup copy of important data you have stored in the
unit’s memory on a USB memory.
552
● Unfortunately, it may be impossible to restore the contents of
data that was stored in the unit’s memory once it has been
lost. Roland Corporation assumes no liability concerning such
loss of data.
lost. Roland Corporation assumes no liability concerning such
loss of data.
553
● Use a reasonable amount of care when using the unit’s
buttons, sliders, or other controls; and when using its jacks
and connectors. Rough handling can lead to malfunctions.
and connectors. Rough handling can lead to malfunctions.
554
● Never strike or apply strong pressure to the display.
SD-50_e.book 7 ページ ２０１０年１月２５日 月曜日 午前１０時５２分