Technical information

29
Troubleshooting
Problem What to do
Low rumbling sound with • Adjust the earcup fit to create a better seal on the head.
headset turned on in a The headset’s low-force design makes it sensitive to
quiet environment items that interfere with the seal around the ear.
Ensure that the ears are completely inside the ear
cushions and that items such as a hat or eyeglasses
with thick temples do not interfere with the seal.
• Check ports at the outside surface of each earcup to
ensure they are not blocked. If dust or dirt is present,
carefully remove the debris using tweezers. Do not blow
out or vacuum debris.
• Inspect the seal between the ear cushion skirt and the
earcup. The skirt should enclose the earcup evenly,
without gaps. If the ear cushion has surface tears, torn
stitching joints, large wrinkles, or a surface which has
become dried and stiff, replace the ear cushions.
Crackling sound audible • Adjust the earcup fit to eliminate the sound. See
with headset turned on in a Wearing the Headset.
loud environment, or ANR • If battery powered, check to see if the battery is low, red
is intermittent. light is on.
• If aircraft powered, check that the voltage powering the
headset is greater than 10 VDC.
• Inspect the seal between the ear cushion skirt and the
earcup. The skirt should fit into the slot on the earcup,
without gaps. If the ear cushion has surface tears, torn
stitching joints, large wrinkles, or a surface which has
become dried and stiff, replace the ear cushions.
No active noise reduction and • Check boom microphone cable connection on the
no communication bottom of the earcup.
Do not attempt to disassemble or service the inside of the earcups or other parts of the
headset. Only the boom microphone cable, connector access cover, battery, battery cover,
wind screen, and ear cushions, are replaceable by the user. For instructions on how to care for
the headset and how to replace the ear cushions, refer to General Care and Maintenance.