Axnes Aviation AS
Document number
Revision
Date
AX-PSB-UMAN-0027
Issue E
2015-03-05
Page 3-1
Section 3:
Operation
3.1 MP20 series charging
Please make sure to fully charge the MP20 before using the unit the first time. The MP20 is
equipped with NiMh batteries and a charge cycle will normally take approximately 3 hours
from when the battery is empty.
The MP20 will indicate a low battery condition at approximately 10% remaining battery
capacity. This will be indicated with a low battery warning tone in the helmet/headset or
loudspeaker.
The MP20 must be charged using the Polycon CHG 1236 M/S charging unit. The charging
cradle is designed to fit the radio and to keep the radio stable and secure while charging. A
green indicator in the charger will illuminate during charging, and will start flashing when the
charging cycle is complete, and the radio is fully charged.
MAKE SURE THE MP20 IS SWITCHED OFF DURING CHARGING.
If fully discharged, the charging might needed to be restarted after the unit has been in the
charger for a few minutes. Please do so by lifting the unit out of the charger and putting it
back in again to ensure a correct charge cycle.
3.2 Power Up/Down Sequence
Power ON/OFF and Volume is controlled by two buttons located on the side of the cabinet.
The upper button controls the ON- and Volume-UP functions, while the lower button controls
the OFF and Volume-DOWN functions.
To turn the radio on,
press the “On/Volume UP” button. The radio will be switched on, and a
long start-up indication tone will be heard. The unit will then be in stand by mode, set to a
pre-defined Power-Up volume setting. Units with software version 3.0 and higher will do a
display test showing ‘8.8.’ in the display followed by the software version displayed as a two
digit code.
To turn the unit OFF, press the Off/Volume Down button until the volume is at 0 and continue
holding it until a long “beep” tone is heard. The display will be switched off and indicate that
the unit is turned off.
The Volume can be controlled by rapidly pushing the volume buttons step-by-step, or by
holding the button. When adjusting the volume it will be indicated on the unit display as well
as by a corresponding beep tone volume.
