E-16Power SupplyTurning Off the Keyboard• Be sure to press the POWER button to turn off power andmake sure that the LCD backlight is off before disconnectingthe AC adaptor or doing anything else.• Never disconnect the AC adaptor while the keyboard isturned on or try to turn off power using any other techniquebesides pressing the POWER button. Doing so can causethe contents of the keyboard’s Flash memory to becomecorrupted. Strange keyboard operation and abnormalstartup when power is turned on are symptoms ofcorrupted Flash memory contents. See “Troubleshooting”on page E-95 for more information.IMPORTANT!• While the following message is on the display, neverturn off the keyboard by pressing the POWER button,disconnecting the AC adaptor, etc.(message) “Pls Wait” or “Bulk In”Turning off the keyboard while the above message ison the display can cause user data (user tones, songmemory data, etc.) currently stored in keyboard memoryor on external media to become corrupted. Oncecorrupted, you may not be able to recall the data again.Memory ContentsIn addition to the above settings, data stored in theRegistration Mode and Song Memory Mode is also retainedwhen keyboard power is turned off.Saving Setups and Memory ContentsAbout Flash memoryYour keyboard comes with built-in Flash memory, which cancontinue to hold data even when electrical power is totallycut off. This means that even after batteries go completelydead, you can attach the AC adaptor, turn on power, and stillrecall data stored in memory.You can back up keyboard memory contents and other datausing the media described below.• SmartMedia TM CardSee “Using a SmartMedia Card” on page E-83.• Floppy Diskette (WK-3700 only)See “Using the Floppy Disk Drive (WK-3700 Only)” on pageE-84.• Computer hard diskSee “MIDI” on page E-79.738A-E-018AIMPORTANT!• When running under battery power, be sure to replacebatteries as soon as possible after the first signs of lowbattery power (dim power indicator lamp, dim displaycharacters, etc.) Though the keyboard’s Flash memoryis non-volatile (which means that data is not lost whenpower is interrupted), data can be lost if power suddenlyfails while data is being written to flash memory*.* While storing or deleting user data, while recordingwith the synthesizer, while transferring data from acomputer, etc.Initializing the KeyboardInitialization can be used to return keyboard parameters totheir initial factory default settings, or to delete all datacurrently in keyboard memory. See page E-73 for moreinformation about initialization.Returning the keyboard to its initial factory defaultsYou can use the CD-ROM that comes with the keyboard andyour computer to return the keyboard’s flash memory andall of its parameters to their initial factory default settings.See “Bundled CD-ROM Data” on page E-80 for details.