Manual Roland AT-20S (page 5 of 124) (English)

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Important Notes

291b

In addition to the items listed under “IMPORTANT SAFETY INSTRUCTIONS” and “USING THE UNIT SAFELY” on pages 2,

3 and 4, please read and observe the following:

Power Supply

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.

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.

308

• Although the LCD and LEDs are switched off when the

POWER switch is switched off, this does not mean that the

unit has been completely disconnected from the source of

power. If you need to turn off the power completely, first

turn off the POWER switch, then unplug the power cord

from the power outlet. For this reason, the outlet into

which you choose to connect the power cord’s plug

should be one that is within easy reach.

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 inter-

ference.

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 initi-

ating 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.

353

• Observe the following when using the unit’s floppy disk

drive. For further details, refer to “Before Using Floppy

Disks” (p. 6).

• Do not place the unit near devices that produce a

strong magnetic field (e.g., loudspeakers).

• Install the unit on a solid, level surface.

• Do not move the unit or subject it to vibration while

the drive is operating.

354b

• 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.

Also, do not allow lighting devices that normally are used

while their light source is very close to the unit (such as a

piano light), or powerful spotlights to shine upon the

same area of the unit for extended periods of time.

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.

356

• Do not allow rubber, vinyl, or similar materials to remain

on the unit for long periods of time. Such objects can

discolor or otherwise harmfully affect the finish.

358

• Do not allow objects to remain on top of the keyboard or

pedal board. This can be the cause of malfunction, such as

keys ceasing to produce sound.

359

• Do not paste stickers, decals, or the like to this instrument.

Peeling such matter off the instrument may damage the

exterior finish.

Maintenance

401b

• To clean the unit, use a dry, soft cloth; or one that is

slightly dampened. Try to wipe the entire surface using an

equal amount of strength, moving the cloth along with the

grain of the wood. Rubbing too hard in the same area can

damage the finish.

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 floppy

disk, 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 losing important data, we recommend that you

periodically save a backup copy of important data you

have stored in the unit’s memory on a floppy disk.

552

• Unfortunately, it may be impossible to restore the contents

of data that was stored in the unit’s memory and a floppy

disk once it has been 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.

554

• Never strike or apply strong pressure to the display.

AT-20S.e.book 5 ページ２００３年１１月１０日　月曜日　午後２時３７分

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