Power Acoustik PTID-8940NRBT Gen 2 Owner's Manual page 47

Delete the file "calib.ifo" only. Insert the SD card into NAVIbox again, and connect
the NAVIbox with another unit.
Go to NAVI mode
Touch the icon "NAVI" to enter the NAVI Mode if NAVIBOX connected:
Following screen will be displayed:
Read information and touch "I agree" button at the bottom of the screen.
Enter the NAVI mode by main menu, the NAVI operations are effective only, all other
processes are disable such as Radio, CD etc.
NOTE:
Under NAVI mode, please view all operations by Navigation Device NAVIBOX-1
User's manual.
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