Panasonic RX-DT770 - Manual (Page 4)

Power Sources Memory Back-up Batteries
To
Operate on
AC
power
Connect the included AC power cord to the AC socket of this unit
and your household AC outlet.
To operate on battery power
Battery installation
Unplug the AC power cord from the household AC outlet and the AC
socket of the unit.
Insert eight R20/LR20 (UM-1) size batteries {not included) into the
battery compartment, making sure that the batteries are installed in
the designated numerical order and that the proper polarities are
maintained.
It is recommended that the memory back-up batteries are installed
before you install R20/LR20 (UM-1) size batteries (see right of this
page).
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outer row
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Battery life
When the display of the front panel starts to flash, replace
all the batteries with new ones.
It Is recommended that the memory back-up batteries (not included)
be installed first to prevent the memory contents from being lost
when the power fails, the power cable has been disconnected or
the batteries have become flat.
Battery installation
Insert four R6/LR6 (UM-3) batteries (not included) in the order num­
bered in the illustration below.
Battery removal
Remove as shown in the figure below.
Insert your finger and push out the batteries.
Battery life
• The service life of these batteries is approximately one year.
To preserve the memory contents, connect the power cable to the
household AC outlet before replacing all the back-up batteries
with new ones.
• When disconnecting the power cable, first turn the unit off by
pressing POWER.
The service life of the memory back-up batteries is reduced if the
power cable is disconnected from the household AC outlet with
the power still supplied.