Wunder Audio CM7 - Manual (Page 5)

Shutdown and Storage
Before switching off the microphone or disconnecting cables, reduce the
volume of the connected equipment – only then should the PSU be
switched off.
Disconnect the cables. When disconnecting a cable, always pull only on
the connector housing and not the cable itself.
When the microphone is not in use it should put away so that dust does
not accumulate.
A microphone which is unused for a prolonged period should be stored in
a cool, dry place.
Cleaning
Under normal conditions the microphone body may become dirty and
covered with fingerprints. One or two drops of Lubriderm unscented hand
lotion can be gently rubbed into the nickel finish with a terry cloth and
then wiped clean.
Troubleshooting
Microphone not operating
Possible causes:
a. PSU not switched on
b. Microphone not connected to PSU
c. Tube loose or unplugged
Noisy Signal
Possible causes:
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