User manual

Backup battery compartment
Version 1 cmx® DMS 7640 Seite 29 von 31
12. Backup battery compartment
Open the battery door at the rear of the unit
Insert 2 pieces of AA-batteries (UM-3/LR6 type) in the
battery compartment.
These two batteries are for backup of the “real time clock” and
“radio memory preset stations during brief power outages”.
Please observe the correct polarities or the memory will not be
properly maintained.