In Case Of Difficulty - Sennheiser NoiseGard HMEC 300 Bedienungsanleitung

Problem
Clear communication but no
active noise compensation
136
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In case of difficulty

If problems occur that are not listed in the below table, please contact your Sennheiser
agent.
Possible cause and what to do
The NoiseGard™ electronics are turned off.
Check to see if the ON/OFF switch is set to ON.
The XLR-3 plug has been pulled out of the power source.
Check to see if the XLR-3 plug is correctly connected to the power source.
If aircraft powered: The aircraft fuse is defective.
Check the aircraft fuse.
If battery powered (except HMEC 302, HMEC 305 and HMEC 306): The batteries are low.
Check to see if the green LED on the battery pack is lit. If the red LED is lit, replace
the batteries.
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