Controls and functions, Power on/off switch, Power led – Lectrosonics MM400a - Manual User Manual
Page 6: Mic jack
MM400A
CONTROLS AND FUNCTIONS
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POWER
MIC JACK
POWER LED
FREQUENCY SELECT
SWITCH COVER PLATE
MODULATION
LEDs
AUDIO
LEVEL
ANTENNA
BATTERY
COMPARTMENT
WARNING! TO PREVENT INTERNAL CORROSION!
If the transmitter is wet (either due to immersion or high levels of perspiration), BEFORE opening any
covers or connectors, carefully blot the transmitter dry with a clean paper towel or cloth. Remove all
moisture. After opening any connector or cover, carefully blot up any remaining moisture that may have
remained around the seal. THIS IS IMPORTANT! DO NOT CLOSE ANY COVER OR CONNECTOR
BEFORE MAKING CERTAIN THERE IS NO MOISTURE IN OR NEAR THE OPENING. After use, it is
important to store the transmitter in a dry place with all access doors and connectors opened to allow
any internal humidity to evaporate. Specifically, open the battery door, the frequency cover plate and
fully unscrew and remove the microphone connector before storing. Do NOT store wet and do NOT store
sealed. If moisture is sealed inside the unit it has nowhere to go other than to chemically react with and
destroy components and the printed circuit board.
POWER ON/OFF SWITCH
There is no on/off switch for this unit. Insert a battery into
the Battery Compartment to turn the unit on and remove
the battery to turn the unit off.
Caution
There will be a thump in the associated receiver when the
transmitter battery is inserted or removed. It is highly recommended
to turn the receiver’s audio off in the main sound prior to inserting
or removing the battery from the MM400A.
POWER LED
The Power LED glows green when the battery is good.
The color changes to red when there is about 30 minutes
of operation left with the recommended lithium battery.
(An alkaline battery will have about 20 minutes of life
left.) When the LED begins to flicker red, there are only
a few minutes of life.
Note
A NiMH battery will give little or no warning when it is depleted. If
you wish to use NiMH batteries in the MM400A, we recommend
trying fully charged batteries in the unit, noting the length of time
that the batteries 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 cause the POWER LED
to glow green immediately after being put in the unit, but
will soon discharge to the point where the LED will go
red or shut off completely.
MIC JACK
The Microplug (2.5 mm) input on the transmitter accom
modates 2 wire positive bias lavalieres. A watertight mic
connector is available from Lectrosonics as an assembly
LECTROSONICS, INC.
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