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6 Troubleshooting
Problem
1. Microphone does
not work:
2. Headset does not
fit securely;
microphone arm
wobbles:
3. Loud pop, wind,
and/or breath
noise:
4. Microphone
sound becomes
duller by and by:
Possible Cause
No supply voltage.
Headband is not ad-
justed correctly.
Microphone sits too
close to mouth or
nose.
Internal or W 44
external windscreen
when soiled
attenuates high fre-
quencies.
Remedy
C 420: Check phan-
tom power source.
C 420 B/lock: Check
batteries in the
B 29 or PT 300.
C 420 L: Check bat-
teries in the body-
pack transmitter.
Adjust headband
exactly as described in
section 3.1, referring
particularly to fig. 9.
Align microphone
sound entry with
corner of mouth and
move microphone just
far enough away from
mouth and nose to
stop breath noise.
1. Clean W 44 wind-
screen with soap
suds.
2. Refer cleaning of
internal windscreen
to nearest AKG
Service Center.
ATTENTION: Do not
open microphone
case yourself. This
would void the war-
ranty.