Fostex FM-4, Owner'S Manual, Page: 6 / 32

Basic operations
To operate the unit on internal battery power, set AA
alkaline or nickel hydride batteries to the supplied
battery box and fit the box to the battery compart-
ment on the right side panel .
Optional AC adaptor or
external battery
<Note>: The rated voltage of the [DC IN] connector is DC 10
V to 24 V . When you connect an external power source to
the [DC IN] connector, use the appropriate power source that
matches the rated voltage of the [DC IN] connector .
For the detail information on the pin assignment of the [DC IN]
connector, see page 14 of “Features and controls” .
To operate the unit on external power, connect the
optional dedicated AC adaptor or an external battery
to the [DC-IN] connector on the left side panel .
Make sure to set alkaline or nickel hydride batteries
to the battery box in correct direction as marked on
the box . Set four batteries on each side of the bat-
tery box .
<Note>:
Always use eight new alkaline or fully charged nickel
hydride batteries of the same model and same capacity .
<Note>: Insert the battery box to the battery box compartment in
the correct direction by matching the symbol on the battery box
to the symbol on the panel of the unit .
Symbol
Battery box
<Memo>:
You can set the battery type (alkaline or nickel
hydride) to be used from the meter display . By default, it is
set for alkaline batteries . If you use nickel hydride batteries,
change the battery type setting (see page 23) .
Battery box compartment
<Note>: If the battery type setting do not match the bat-
teries currently used, the EMPTY indicator, battery indica-
tor and alert display do not work correctly .
Battery box compartment
<Memo>: To remove the battery
box, slide down the [EJECT/LOCK]
lever to unlock the battery box .
The battery box is slid to the front a
few millimeters and you can pull it
out by hand .
<Note>: Before you remove the battery box, turn off the
power or set the [POWER] switch to the “EXT position .
After fully inserting the battery
box, slide up the [EJECT/LOCK]
lever to the LOCK position .
A tab appears as shown on the
right figure and the battery box
is locked .
Battery box
Tab
Preparation of power supply