Yamaha GW50 Owner's Manual - Page 5

PRECAUTIONS PRECAUTIONS s 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.) s USE ONLY APPROPRIATE FOOT CONTROLLERS AND FOOTSWITCHES Certain functions of the GW50 can be controlled by the optional Yamaha FC7 Foot Controller and the FC5 (or FC4) Footswitch. Use of any other pedal or footswitch besides those recommended here may result in erratic operation or may cause some other trouble in the foot controller or footswitch itself. s 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: (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 personnel 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 recorder, such as the Yamaha MDF2 MIDI Data Filer or another data storage device, for safe, longterm 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. s 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 precision-made electronic device, also avoid applying 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. ii PRECAUTIONS