JRC JMA-5204 Instruction Manual page 186

[V] Erasing navigation information from memory (Erase User Map)
Procedure 1
2
* Each time you press [1] key, the Device item is switched between
INTERNAL and CARD2.
INTERNAL: Erases saved data from the processor.
CARD2:
To select CARD2, insert the flash memory card, in which data has
been saved, into card slot 2 (upper stage).
3
Press [5] key while the User Map
Setting Menu is open.
Press [2] key.
The Erase User Map Menu will appear.
Erases saved data from CARD2.
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 97