JRC JMA-5212-4/6 User Manual page 177

3.8 DISPLAY NAVIGATION INFORMATION (NEW INFORMATION DISPLAY)
[V] Erasing navigation information from memory (Erase User Map)
Procedure 1 Press [5] key while the User Map
Setting Menu is open.
2 Press [2] key.
The Erase User Map Menu will appear.
* Each time you press [1] key, the Device item is switched between
INTERNAL and CARD2.
INTERNAL: Erases saved data from the processor.
CARD2: Erases saved data from CARD2.
To select CARD2, insert the flash memory card, in which data has
been saved, into card slot 2 (upper stage).
3 Select the number of the file you want
to erase, pressing the numeric keys [1]
to [5].
The navigation information file will be erased
from the memory, and the file name will
disappear from the file list.
3 98
y
y y
3