User Manual

5
Charging
All headsets have a 5.5 mm panel mounted charger jack located on the right ear dome.
A charger cable assembly with 5.5mm plug is provided with the headset. The unterminated
end of the charger cable can be wired to nominal 12V (11-16V ) from the vehicle. Plug the
terminated end of the charger cable into the headset charger jack (refer to the LED indicators
section for proper operation of the battery charging red LED indicator
NOTES:
1. Observe correct polarity when connecting the charger cable
to12V from the vehicle. Connect the white striped black wire
to +12V and the solid black wire to GND. This will result in a
positive center terminal of the 5.5m charger jack as shown in
the illustration.
2. Firecom does not recommend operating the headset while the headset is being
charged. It is recommended that the headset be charged only when it’s not
being operated and with the power switch on the headset turned off.
Reset
In rare cases, resetting the headset may become necessary. There are two ways the headset
can be reset:
1. While the headset power is turned off, access the reset SMT switch SW2 on the charger
board in the right ear dome. The switch can be accessed by removing the ear seal and
the top foam. Using a pen tip, depress and hold the switch down for 2 seconds, then
release. The green and red LED’s on the left ear dome illuminate momentarily, then turn
off. Turn the headset power on and the headset should resume normal operation.
2. Plug the charger plug into the charger jack on the right ear dome.
NOTES:
1. In case the battery is deeply discharged, no LED indication will be possible until
the battery is partly charged to an operable voltage level.
2. Plugging the charger plug into the headset at anytime will cause the headset
to reset even when the headset is connected to a base station. Resetting a
connected headset will result in losing the connection for about 10-12 seconds.
Care and Maintenance
Repairs or replacement of the headset should be immediately sought if you see any defect
such as holes or cracks in the ear domes, ear seals or headband.
Body oils, perspiration and hair care products will, over time, affect the ear seals. Inspect the
ear seals frequently for signs of wear and replace at approximate 6 month intervals along with
the mic muff (cover).
Do not remove the foam speaker cover.
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