Yamaha S90 Owner's Manual page 5

Connections
• Before connecting the instrument to other electronic components,
turn off the power for all components. Before turning the power on
or off for all components, 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.
Maintenance
• When cleaning the instrument, use a soft, dry cloth. Do not use
paint thinners, solvents, cleaning fluids, or chemical-impregnated
wiping cloths.
Handling caution
• Do not insert a finger or hand in any gaps on the instrument.
• Never insert or drop paper, metallic, or other objects into the
gaps on the panel or keyboard. If this happens, turn off the power
immediately and unplug the power cord from the AC outlet. Then
have the instrument inspected by qualified Yamaha service
personnel.
• 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.
• Do not operate the instrument for a long period of time at a high
or uncomfortable volume level, since this can cause permanent
hearing loss. If you experience any hearing loss or ringing in the
ears, consult a physician.
Yamaha cannot be held responsible for damage caused by improper use or modifications to the instrument, or data that is lost or destroyed.
Always turn the power off when the instrument is not in use.
Saving data
Saving and backing up your data
• DRAM data (see page 27) is lost when you turn off the power to
the instrument. Save the data to the Flash ROM (USER memory;
see page 73).
Saved data may be lost due to malfunction or incorrect operation.
Save important data to a Memory Card (SmartMedia).
Never attempt to turn off the power while data is being
written to Flash ROM (while an "Executing..." or "Please
keep power on" message is shown). Turning the power off in
this state results in loss of all user data and may cause the
system to freeze (due to corruption of data in the Flash
ROM).
When you exit from the Utility mode or Favorite Category
function, the parameter you changed in the display is
automatically stored. However, this edited data is lost if you
turn off the power without properly exiting from the display.
Backing up the Memory Card (SmartMedia)/
external media
• To protect against data loss through media damage, we
recommend that you save your important data onto two Memory
Cards (SmartMedia)/external media.
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