Important notes, P. 75), Caution – Roland HandSonic HPD-20 Digital Hand Percussion Instrument User Manual
Page 75: Power supply, Placement, Maintenance, Repairs and data, Additional precautions

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75
CAUTION
Place in a well ventilated location
The unit and the AC adaptor should
be located so their location or position
does not interfere with their proper
ventilation.
Use only the specified stand(s)
This unit is designed to be used in
combination with specific stands (PDS-
10) manufactured by Roland. If used in
combination with other stands, you risk
sustaining injuries as the result of this
product dropping down or toppling over due to a
lack of stability.
Evaluate safety issues before using stands
Even if you observe the cautions given
in the owner’s manual, certain types of
handling may allow this product to fall
from the stand, or cause the stand to
overturn. Please be mindful of any safety
issues before using this product.
When disconnecting an AC adaptor, grasp it by
the plug
To prevent conductor damage, always
grasp the AC adaptor by its plug when
disconnecting it from this unit or from a
power outlet.
CAUTION
Periodically clean the AC adaptor’s plug
At regular intervals, you should unplug
the AC adaptor and clean it by using
a dry cloth to wipe all dust and other
accumulations away from its prongs.
Also, disconnect the power plug from the
power outlet whenever the unit is to remain unused
for an extended period of time. Any accumulation of
dust between the power plug and the power outlet
can result in poor insulation and lead to fire.
Manage cables for safety
Try to prevent cords and cables from
becoming entangled. Also, all cords and
cables should be placed so they are out
of the reach of children.
Avoid climbing on top of the unit, or placing
heavy objects on it
Never climb on top of, nor place heavy
objects on the unit.
Do not connect or disconnect the AC adaptor
with wet hands
Never handle the AC adaptor or its plugs
with wet hands when plugging into, or
unplugging from, an outlet or this unit.
CAUTION
Disconnect everything before moving the unit
Before moving the unit, disconnect the
AC adaptor and all cords coming from
external devices.
Unplug the AC adaptor from the outlet before
cleaning
Before cleaning the unit, turn it off and
unplug the AC adaptor from the outlet
If there is a possibility of lightning strike,
disconnect the AC adaptor from the outlet
Whenever you suspect the possibility of
lightning in your area, disconnect the AC
adaptor from the outlet.
Keep small items out of the reach of children
To prevent accidental ingestion of the
parts listed below, always keep them out
of the reach of small children.
• Removable Parts
Screws (p. 11)
IMPORTANT NOTES
Power Supply
• Do not connect this unit to same electrical outlet
that is being used by an electrical appliance that
is controlled by an inverter or a motor (such as a
refrigerator, washing machine, microwave oven, or
air conditioner). 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.
• The AC adaptor will begin to generate heat after
long hours of consecutive use. This is normal, and is
not a cause for concern.
• To prevent malfunction and equipment failure,
always make sure to turn off the power on all your
equipment before you make any connections.
Placement
• 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.
• This device may interfere with radio and television
reception. Do not use this device in the vicinity of
such receivers.
• 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.
• 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.
• 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.
• 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.
• Do not place containers or anything else containing
liquid on top of this unit. Also, whenever any liquid
has been spilled on the surface of this unit, be sure
to promptly wipe it away using a soft, dry cloth.
Maintenance
• For everyday cleaning wipe the unit with a soft,
dry cloth or one that has been slightly dampened
with water. To remove stubborn dirt, use a cloth
impregnated with a mild, non-abrasive detergent.
Afterwards, be sure to wipe the unit thoroughly
with a soft, dry cloth.
• Never use benzine, thinners, alcohol or solvents of
any kind, to avoid the possibility of discoloration
and/or deformation.
Repairs and Data
• Before sending the unit away for repairs, be sure to
make a backup of the data stored within it; or you
may prefer to write down the needed information.
Although we will do our utmost to preserve the
data stored in your unit when we carry out repairs,
in some cases, such as when the memory section
is physically damaged, restoration of the stored
content may be impossible. Roland assumes no
liability concerning the restoration of any stored
content that has been lost.
Additional Precautions
• Any data stored within the unit can be lost as the
result of equipment failure, incorrect operation,
etc. To protect yourself against the irretrievable
loss of data, try to make a habit of creating regular
backups of the data you’ve stored in the unit.
• Roland assumes no liability concerning the
restoration of any stored content that has been
lost.
• 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.
• Never strike or apply strong pressure to the display.
• When disconnecting all cables, grasp the connector
itself—never pull on the cable. This way you will
avoid causing shorts, or damage to the cable’s
internal elements.
• To avoid disturbing others nearby, try to keep the
unit’s volume at reasonable levels.
• This instrument is designed to minimize the
extraneous sounds produced when it’s played.
However, since sound vibrations can be
transmitted through floors and walls to a greater
degree than expected, take care not to allow these
sounds to become a nuisance others nearby.
• When you need to transport the unit, package
it in the box (including padding) that it came
in, if possible. Otherwise, you will need to use
equivalent packaging materials.
• Some connection cables contain resistors. Do not
use cables that incorporate resistors for connecting
to this unit. The use of such cables can cause the
sound level to be extremely low, or impossible
to hear. For information on cable specifications,
contact the manufacturer of the cable.
• The usable range of D-BEAM controller will become
extremely small when used under strong direct
sunlight. Please be aware of this when using the
D-BEAM controller outside.
• The sensitivity of the D-BEAM controller will
change depending on the amount of light in the
vicinity of the unit. If it does not function as you
expect, adjust the sensitivity as appropriate for the
brightness of your location.
Using External Memories
• Please observe the following precautions when
handling external memory devices.
Also, make sure to carefully observe all the
precautions that were supplied with the external
memory device.
• Do not remove the device while reading/writing
is in progress.
• To prevent damage from static electricity,
discharge all static electricity from your person
before handling the device.