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If a problem occurs
SD Series - User Guide | 39
If a problem occurs
For causes and solutions that are mainly related to the base station, refer to the chapter “If a problem occurs ...”
in the “Setup Guide”.
For more information and an FAQ list, please visit our website at www.sennheiser.com/cco.
If a problem occurs that is not listed in the above table or if the problem cannot be solved with the proposed
solutions, please contact your local Sennheiser partner for assistance.
To find a Sennheiser partner in your country, search at www.sennheiser.com/cco/support.
Problem Possible cause Possible solution Page
Headset is placed into the base
station but the Charge status
LED if off
Rechargeable battery is deep
discharged
Wait several minutes until the
Charge status LED lights up.
29
For quick-charging the headset:
Briefly press the Set button at the
bottom of the base station.
–
Link between headset
and base station
cannot be established
Wrong operating mode
(Phone/PC)
Press the PC button or the
Phone button to select the correct
operating mode.
22
Headset is not paired with the
base station, the Link LED
lights up red
Place the headset into the base
station.
17
Bad radio link between
headset and base station
Transmission range is
exceeded
Reduce the distance between
headset and base station.
–
Adjust the radio range. 16
Noise interference and
connection loss
Microphone rubs on the cheek
or perhaps the beard
Bend the microphone boom so
that the microphone is about
0.8 - 1.2” (2 - 3 cm) from the
corner of your mouth.
13
Too many DECT systems within
the radio range
Reduce the radio range. 16
Set the base station to
narrowband transmission.
16
Distance between base station
and fixed line phone is so small
that interference occurs
Increase the distance between
base station and fixed line phone.
–
Rechargeable battery cannot
be charged
Charging contacts of the
headset or the base station are
dirty
Clean the charging contacts on
the headset and on the base
station.
34
Rechargeable battery is
defective
Replace the defective
rechargeable battery with a new
one.
36
Headset is not properly placed
into the magnetic holder of the
base station
Check if the headset is properly
placed into the magnetic holder.
29
Rechargeable battery is
quickly depleted even after
charging
Overaged rechargeable battery Replace the overaged rechargeable
battery with a new one.
36
Bad audio quality, the other
party sounds too low or too
loud
Microphone sensitivity is not
correctly adjusted
Adjust the microphone sensitivity. 19
Sound from the fixed line
phone is distorted and
disturbed
Base station is not adjusted to
the fixed line phone.
Use the ABC switch to adjust the
base station to your fixed line
phone.
19