See also:

Service booklet
Perform maintenance work at the service center, and record the work in the service booklet. The entries are proof of regular maintenance. ...

What to do if...
Only a black screen is visible. Switch on the system. There are no options available on the screen. Replace remote control batteries. Radio stations or TV channels are grayed out and c ...

Tone control
You can alter various tone settings, e.g. treble and bass or the speed-dependent volume increase. The tone settings are applied to all audio sources. The settings are stored for the remote control ...