The status LED
on OSKAR is continuously lit and the pairing LED
on the base station is continuously lit.
Possible cause
Possible solution
The digital audio format is not set to PCM (often after initial installation or when switching to a different TV).
Check the audio output format setting in your TV's settings menu. Make sure that PCM is selected as your TV's audio output format.
The TV sound has been muted.
Increase your TV's volume or unmute it.
OSKAR may have entered off mode after 15 minutes without a signal.
Switch OSKAR off and on again.
No input cable is connected to the base station.
Make sure that an input cable is connected to the base station. Use one of the supported connections: HDMI (ARC), optical or AUX.
The HDMI cable is not connected to the correct HDMI ARC/eARC socket on the TV.
Make sure that the HDMI cable is firmly connected to the TV's HDMI ARC or HDMI eARC socket.
No sound – the base station's pairing LED is off
The pairing LED
on the base station is off.
Possible cause
Possible solution
Not correctly connected to the mains socket.
Make sure that the USB-C cable is correctly connected to the base station and the power adapter .
The base station is switched off or in an unknown state.
Unplug the USB cable from the base station while leaving the power adapter plugged in, then reconnect it to the base station after 30 seconds. The pairing LED should then flash and remain lit once the connection to OSKAR has been established.
Problem with the power adapter.
To investigate further, use a different USB-C power adapter with an output current of at least 2 A and a different USB-C cable.
No sound – OSKAR is off
The status LED
on the OSKAR speech amplifier is off.
Possible cause
Possible solution
If no sound is detected for 15 minutes, OSKAR and the base station automatically enter standby mode.
To restart the active connection, switch OSKAR off and on again.
OSKAR is switched off.
Switch OSKAR on and make sure that the status LED is continuously lit.
OSKAR's battery is not charged.
Charge the OSKAR speech amplifier by placing it on the base station or connecting a USB-C charger directly to the USB connection .
No sound – LEDs are flashing
The pairing LED
on the base station
and the status LED
on OSKAR flash after switching on or occasionally during operation.
Possible cause
Possible solution
The wireless connection between the base station and OSKAR is unstable or affected by other wireless sources. Devices such as smartphones, Wi-Fi access points and microwave ovens generate radio waves and may cause radio interference.
Place OSKAR and the base station at a sufficient distance from such devices. Disable Bluetooth or Wi-Fi on those devices when not needed.
Sound interruptions
Possible cause
Possible solution
OSKAR is too far from the base station, for example in another room.
Reduce the distance to the base station .
The sound is too quiet
The sound is too quiet even though OSKAR's volume is set to maximum.
Possible cause
Possible solution
The TV's output volume for the connection in use is set too low.
Check the output level in your TV's sound settings and increase it or set it to maximum.
The TV's output level may be fixed and linked to the TV's volume control.
Set the TV volume to a high level (usually ¾ of the maximum) and adjust the desired volume on OSKAR using only its control. This also ensures that OSKAR receives a sufficient signal level to operate.
The sound is distorted
OSKAR's sound is distorted when the TV's headphone output is used.
Possible cause
Possible solution
The output signal sent to the base station is too high.
Check the output level in your TV's sound settings and reduce it. Check that the sound is not distorted even when OSKAR's volume control is turned up.
A high output signal is being sent to the base station, and the output level is linked to the TV's volume control.
In this case, set the TV volume to a lower level and adjust the desired playback volume on OSKAR using only its volume control. Check that the sound is not distorted even when OSKAR's volume control is turned up.
A humming noise is heard during playback
Possible cause
Possible solution
The AUX cable is not plugged into your TV's AUX or headphone socket.
Check that you are using the correct socket on your TV.
The AUX cable is not fully inserted into the base station or TV.
Make sure that both ends of the cable are fully inserted into the corresponding sockets.
The TV socket is oxidised/dirty and has poor contact.
Insert the cable into the TV socket several times. Repeated insertion may improve contact.
TV sound and OSKAR sound are not synchronised
This may occur when using a TOSLINK connection.
Possible cause
Possible solution
The TV sound is not muted.
Mute the TV sound or set its volume to 0.
ℹNote:
We strongly recommend disabling TV sound while using OSKAR to ensure optimal speech intelligibility through OSKAR. If you nevertheless choose simultaneous sound output, there may be a delay between the outputs. Enable “Audio delay” in your TV's audio settings and find a value that synchronises the TV sound with OSKAR.
The battery is not charging
Possible cause
Possible solution
OSKAR is not making charging contact with the base station.
Clean the charging contacts with a soft cloth. To avoid malfunctions, do not press too hard on the charging contacts.