We have the same player connected to a BV7 MKIII in the USA. I don't know if controls would be the same on a Beocenter 6, but here is what works for us.
list v. aux go...... to turn on, although today it is not turning it on for some reason today.
stop........pauses the player, also use this to turn off, have player set up so after a pause of a period of time, I think it is two hours, it is in the player settings, it turns off
arrows and go to navigate the disc menus
menu 1 brings up the system menu for the player
menu 2 brings up the video format for the player
menu 3 brings up the audio format for the player
menu 4 subtitles
red brings up the pop or main disc menu
green starts the dis over, although the on screen menu says it is top menu
yellow slow forward
blue slow reverse
go and arrow up skips forward chapters, may hit arrow more than once after hitting go
go and arrow down to skip back a chapter, may hit arrow more than once after hitting go
go and arrow left to scan backwards, hitting arrow more than once increases speed
go and and arrow right to scan forward, hitting arrow more than once increases speed
go twice to stop scan forward or back.
Hope this helps.
Beovision 7-55 with Beolab 7-4, 9s and 4000s
Beovision 10-40 with Beolab 1s and 6000s
Beosound 1, 5, 2000, and 3000
Beotime, Beotalk, Beocoms