Power Acoustik PTID-8940NRT Operating Manual page 41

The Touch Screen is restored to their default positions. Touch anywhere of panel to
finish the calibration and go to the following screen:
Read information and touch "I agree" button at the bottom of the screen, then enter
the NAVI mode.
NOTE:
If change the NAVIbox to connect another unit, please take out the SD card from the
NAVIbox and connect with computer, the following screen is displayed on computer:
Delete the file "calib.ifo" only. Insert the SD card into NAVIbox again, and connect the
NAVIbox with another unit.
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