Troubleshooting - Sennheiser MB 660 Instruction Manual

Troubleshooting

Troubleshooting
Problem Possible cause
Headset cannot Battery is empty
be switched on
Battery is completely exhausted/
worn out
No audio signal Headset is not paired with the
smartphone/Bluetooth device
Volume too low
Headset is in pairing mode
Headset cannot Bluetooth is deactivated on your
connect smartphone
Smartphone is switched off
Pairing does not work
Headset does not Headset is not functioning properly
respond to any
button press
The LED flashes The connection is not established
red while
connecting
Smartphone Bluetooth is deactivated on the
cannot detect the headset
headset
Audio cable is plugged into the
audio input (the headset is in flight
mode)
Voice prompts Voice Prompt is deactivated in
specified in CapTune
this instruction
manual cannot be
heard
Headset does not Smart Pause is deactivated by
respond to Smart factory default
Pause gestures
Smart Pause may not be compatible
with your music player
Headset and Headset is switched off
Bluetooth device
cannot connect
Device does not support NFC pairing Pair the headset and the device manually using
using Bluetooth/
NFC
Headset is in flight mode or the
audio cable is plugged into the
audio input
Bluetooth is deactivated on the
headset
Headset does not Bluetooth is deactivated on the
automatically go headset
to pairing mode
Headset must have been paired
previously to some devices
Possible solution
Charge the headset
Visit an authorized Sennheiser service center for
battery replacement
Check if the headset is paired. If necessary, pair the
headset with the smartphone again
Increase the volume
Ensure that the headset and smartphone are paired
successfully
Activate Bluetooth on your smartphone
Switch your smartphone on
Check if your smartphone supports the HFP or HSP
Bluetooth profile
Restart the headset by switching it off and on
again. If necessary, do a reset
Ensure that the distance between headset and
smartphone is less than 20 cm
Ensure that Bluetooth is activated on both the
headset and the smartphone
Activate Bluetooth on the headset
Unplug the audio cable
Activate Voice Prompt in CapTune
Activate Smart Pause in CapTune
Try another music player or streaming app
Ensure that the headset is switched on during
pairing
Bluetooth
Activate Bluetooth on the headset and/or unplug
the audio cable from the audio input
Activate Bluetooth on the headset
Activate Bluetooth on the headset
Press the Sound Effect Mode button for 4 seconds
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