Yaskawa YASNAC PC NC Maintenance Manual - Manual (Page 283)

PC NC Maintenance Manual Chapter 8: Fixed File Operations
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21. Click the Shut Down button on the screen. (Note: The Shut
Down button on the CRT/LCD panel does not currently work.)
22. Power OFF the PC NC.
23. Change the JFC10 CNC card DIP switch on JCP20 side SW1 bit
1 to off.
24. If this software update has finished using an external CD drive,
do not forget to turn off the external CD drive. Change the JFC10
system number switch to ‘E’.
25. Power ON the PC NC. Touch the Enable/Disable CD-ROM but-
ton and uncheck the Enable check box.
26. Select the Close button. Click the Shut Down button on the CRT
panel.