3.3 Updating System Software
If the system software of the unit needs to be upgraded, please take the following steps to safely update it.
Important: Before carrying out the following procedures, please ensure the floppy disk is working and
the file of system software is intact (The size of the file should be up to 170 K.)
1.Turn off the unit.
2.Insert the floppy disk into the
3.Hold down the 
and 
buttons simultaneously, and then turn on the unit.
4.Keep holding down the buttons until the unit sounds a tone and display the message “ SOFTWARE UPDATE” and an indicating percentage of proceeding against a blue background on the screen. Now the unit is updating the system software, which will take approximately 90 seconds to process.
5.Restart the unit when the device sounds a tone twice and displays the message “ PLEASE RESTART”. The process is complete.
(If you have already followed the procedure 1~5, the unit, however, is not being able to power on. Please first check if the floppy disk you are using is functioning and the file is intact. And then start the procedure 1 ~ 5 all over again.)
6.Verify the version of system software by entering main menu and then press 
and pause 
buttons at the same time.
Warning: Don’t Interrupt the process while the unit is updating itself and proceed with a floppy disk containing with no system software of the unit, which would cause the unit hang on.
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