Care and Maintenance
Cleaning
Scheduled cleaning is not required. However, you can simply wipe the outside surface
of the headphones with a damp cloth, as needed. Also, be sure that the earcup ports
are clear and that no moisture is allowed into the earcups. Use only a dry cloth to
clean the electrical contacts on the battery, in the charger, or in the battery
compartment of the headphones.
CAUTIONS:
• Be sure to unplug the battery charger before cleaning it.
• DO NOT use a moist cloth to clean the electrical contacts on the battery, in the char-
ger, or in the battery compartment of the headphones.
Troubleshooting
If you experience any trouble using your headphones, try the instructions in the
following table. If you still need help, call for technical assistance. In the United States
only, call 1-800-905-2180. For other regions, see the contact information on the inside
back cover.
Problem
No noise reduction • Make sure the headphones power switch is on.
Low or no volume • Make sure the audio source is on and the volume is turned up.
Crackling noise;
intermittent loss of
noise reduction
Low rumbling
sound
Charger indicator
is flashing
Short battery life
after charging
10
What to do
• Charge the battery.
• Do not use the dual-plug adapter.
• Check the headphones cord connection at the source and the
earcup.
• Charge the battery.
• Clean the contacts on the battery and in the battery
compartment. See "Cleaning" on page 10.
• Replace the battery.
• Adjust earcup fit on your ears.
• Make sure earcup ports are not blocked.
• Remove the battery, wait 10 seconds, and insert it again.
• Unplug the charger, wait 10 seconds, and plug it in again.
• Make sure the air temperature is within the acceptable range
for charging, 32° F (0°C) to 95° F (35°C).
• Replace the battery.
• Replace the charger.
• Replace the battery.
• Replace the charger.
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