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Cleaning the devices
28
To clean the radio microphone’s sound inlet basket (MMD 835-1, MMD 845-1, MMD 935-1,
MMD 945-1, MME 865-1):
̈ Unscrew the upper sound inlet basket from the microphone head by turning it counter-
clockwise.
̈ Remove the foam insert.
̈ There are two ways to clean the sound inlet basket:
– Use a slightly damp cloth to clean the upper sound inlet basket from the inside and
outside
– or scrub with a brush and rinse with clear water.
̈ If necessary, clean the foam insert with a mild detergent or replace the foam insert.
̈ Dry the upper sound inlet basket.
̈ Dry the foam insert.
̈ Reinsert the foam insert.
̈ Replace the sound inlet basket on the microphone head and screw it tight.
You should also clean the contact rings of the microphone head from time to time:
̈ Wipe the contact rings of the microphone head with a dry cloth.
If a problem occurs ...
EM 100
CAUTION! Liquids can damage the microphone head!
Liquids can damage the microphone head.
̈ Only clean the upper sound inlet basket.
For information on cleaning the MMK 965-1 microphone head, refer to its instruction
manual.
Problem Possible cause Possible solution
Receiver cannot be oper-
ated, “Locked” appears
on the display panel
Lock mode is activated Deactivate the lock mode (see page 21).
No operation indication No mains connection Check the connections of the mains unit.
No RF signal Transmitter and receiver are not on the
same channel
Set the transmitter and receiver to the same
channel. To do so, use the synchronization
function (see page 20)
Transmitter is out of range Check the squelch threshold setting
(see page 25).
Reduce the distance between transmitter and
receiving antennas.