Manual Yamaha PSR-640 (page 3 of 188) (English)

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• Before moving the instrument, remove all connected adaptor and other cables.

• When cleaning the instrument, use a soft, dry cloth. Do not use paint thinners,

solvents, cleaning fluids, or chemical-impregnated wiping cloths. Also, do

not place vinyl, plastic or rubber objects on the instrument, since this might

discolor the panel or keyboard.

• Do not rest your weight on, or place heavy objects on the instrument, and do

not use excessive force on the buttons, switches or connectors.

• Use only the stand/rack specified for the instrument. When attaching the stand

or rack, use the provided screws only. Failure to do so could cause damage to

the internal components or result in the instrument falling over.

• Do not operate the instrument for a long period of time at a high or uncomfort-

able volume level, since this can cause permanent hearing loss. If you experi-

ence any hearing loss or ringing in the ears, consult a physician.

■SAVING USER DATA

• Always save data to a floppy disk frequently, in order to help prevent the

loss of important data due to a malfunction or user operating error.

Yamaha cannot be held responsible for damage caused by improper use or modi-

fications to the instrument, or data that is lost or destroyed.

Always turn the power off when the instrument is not in use.

PRECAUTIONS

PLEASE READ CAREFULLY BEFORE PROCEEDING

* Please keep these precautions in a safe place for future reference.

WARNING

Always follow the basic precautions listed below to avoid the possibility of serious injury or even death from electrical shock,

short-circuiting, damages, fire or other hazards. These precautions include, but are not limited to, the following:

• Do not open the instrument or attempt to disassemble the internal parts or

modify them in any way. The instrument contains no user-serviceable parts.

If it should appear to be malfunctioning, discontinue use immediately and

have it inspected by qualified Yamaha service personnel.

• Do not expose the instrument to rain, use it near water or in damp or wet

conditions, or place containers on it containing liquids which might spill into

any openings.

• If the AC adaptor cord or plug becomes frayed or damaged, or if there is a

sudden loss of sound during use of the instrument, or if any unusual smells or

smoke should appear to be caused by it, immediately turn off the power

switch, disconnect the adaptor plug from the outlet, and have the instrument

inspected by qualified Yamaha service personnel.

• Use the specified adaptor (PA-6 or an equivalent recommended by Yamaha)

only. Using the wrong adaptor can result in damage to the instrument or

overheating.

• Before cleaning the instrument, always remove the electric plug from the

outlet. Never insert or remove an electric plug with wet hands.

• Check the electric plug periodically and remove any dirt or dust which may

have accumulated on it.

CAUTION

Always follow the basic precautions listed below to avoid the possibility of physical injury to you or others, or damage to the

instrument or other property. These precautions include, but are not limited to, the following:

• Do not place the AC adaptor cord near heat sources such as heaters or radia-

tors, and do not excessively bend or otherwise damage the cord, place heavy

objects on it, or place it in a position where anyone could walk on, trip over, or

roll anything over it.

• When removing the electric plug from the instrument or an outlet, always hold

the plug itself and not the cord.

• Do not connect the instrument to an electrical outlet using a multiple-connec-

tor. Doing so can result in lower sound quality, or possibly cause overheating

in the outlet.

• Unplug the AC power adaptor when not using the instrument, or during electri-

cal storms.

• Before connecting the instrument to other electronic components, turn off the

power for all components. Before turning the power on or off for all compo-

nents, set all volume levels to minimum. Also, be sure to set the volumes of all

components at their minimum levels and gradually raise the volume controls

while playing the instrument to set the desired listening level.

• Do not expose the instrument to excessive dust or vibrations, or extreme cold

or heat (such as in direct sunlight, near a heater, or in a car during the day) to

prevent the possibility of panel disfiguration or damage to the internal compo-

nents.

• Do not use the instrument near other electrical products such as televisions,

radios, or speakers, since this might cause interference which can affect proper

operation of the other products.

• Do not place the instrument in an unstable position where it might acciden-

tally fall over.

(3)-5

Where battery connector wire located on psr-640 piano Submitted on 2-8-2023 at 11:15
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Yamaha PSR-640 Manual

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