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PRECAUTIONS
PRECAUTIONS
(This message appears only when the power is
turned on, and stays in the LCD until a panel
button is pressed.) When this happens, save all
original data to a MIDI data storage device (see
note below) or write down all necessary settings
to a piece of paper, then have the battery
replaced by qualified Yamaha service person-
nel as soon as possible. DO NOT ATTEMPT
TO REPLACE THE BACKUP BATTERY
YOURSELF!
IMPORTANT
BACKING UP DATA—We recommend that you
transfer all important data to a MIDI data re-
corder, such as the Yamaha MDF2 MIDI Data Filer
or another data storage device, for safe, long-
term storage. (For more information, refer to the
section on the MIDI Bulk Dump function, page
102.) Yamaha cannot be held responsible for data
loss caused by battery failure or improper
operation of the GW50.
■ AVOID PHYSICAL SHOCKS
Although the GW50 has been constructed to
withstand the normal rigors of stage and studio
use for optimum sturdiness and reliability,
avoid subjecting it to strong physical shocks
(such as dropping or hitting it), since this may
damage the unit. Since the GW50 is a preci-
sion-made electronic device, also avoid apply-
ing excessive force to the various controls.
Also, avoid stepping on any part of the GW50
other than the Pedal Switches, since this may
damage or break the controls or glass of the
display.
PRECAUTIONS
■ USE THE CORRECT POWER
SUPPLY
Power to the GW50 should be supplied only
from the appropriate Yamaha AC adaptor (the
included PA-3). Use of another adaptor may
cause serious damage to the unit. Also make
sure that the adaptor you have is appropriate for
the AC mains supply voltage in the area where
you intend to use the GW50. (The correct input
voltage is marked on the adaptor.)
■ USE ONLY APPROPRIATE FOOT
CONTROLLERS AND
FOOTSWITCHES
Certain functions of the GW50 can be control-
led by the optional Yamaha FC7 Foot Con-
troller and the FC5 (or FC4) Footswitch. Use
of any other pedal or footswitch besides those
recommended here may result in erratic opera-
tion or may cause some other trouble in the foot
controller or footswitch itself.
■ MEMORY BACKUP
The GW50 memorizes the following data, even
when the power is turned off: Memory effect
program data, Manual effect data (excepting
main parameter values), song data, and
general panel settings. The GW50 contains a
special long-life lithium battery that retains this
data in the internal RAM memory. The battery
should last for approximately five years from
the date of manufacture. When the backup
battery power becomes too low to maintain the
memory contents, a warning message appears
in the LCD: