Battery Installation - Lectrosonics UM400a Quick Start Manual

Battery Installation

UM400a/UM450
To open the battery compartment,
press outward on the cover door in
the direction of the arrow as shown
in the illustration. Only firm, sliding
pressure is needed to open and
close the battery door. Swing the
door open and take note of the
polarity marked inside showing
the location of the positive (+) and
negative (-) terminals. You can also
see the large and small contact
holes inside the battery compart-
ment with the door open.
Insert the battery correctly and
close the cover by pressing the door
closed and across, reversing the
opening procedure. If the battery is
inserted incorrectly, the door will not
close. Do not force the door closed.
The Power LED glows green when the battery is good and the transmitter
is turned on. The LED will glow yellow/orange as the battery voltage drops
and finally glows red when there are about 30 minutes of operation left (when
using an alkaline battery). The LED then blinks red when there are only a few
minutes of life left.
NOTE: While a LiPolymer battery provides long operating time, it will
give little or no warning when depleted. If you use a LiPolymer battery
in the UM450, we recommend trying a fully charged battery in the unit,
noting the length of time that the battery will run the unit and in the
future use somewhat less than that time to determine when the battery
needs to be replaced.
A weak battery will sometimes light the Power LED to the "good" green indica-
tion immediately after being put in the unit, but will quickly discharge to the
point where the LED will go red or shut down (just like a flashlight with "dead"
batteries). If the lamp fails to light, the battery should be replaced.
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To replace the battery, push up on
the Battery Compartment Door and
rotate it clockwise. Remove the old
battery and take note of the polarity
marked inside showing the location
of the positive (+) and negative (-)
terminals. (You can see the large
and small contact holes inside the
battery compartment with the door
open.)
Insert the new battery correctly
and close the Battery Compart-
ment Door by reversing the opening
procedure. If the battery is inserted
incorrectly, the door will not fully
close. Do not force the door closed.
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