The service manual is available on this site, if you upgrade to silver or gold member you can download it. In the same time you will support the site.
Otherwise I'm sure someone who knows will tell you.
Regards, Daniel
Beovision LX5500, BeoCord V6000, BeoSound 9000, BeoLab 8000, BeoLab 3500, BeoLab 2000, BeoVox1, BeoCom 6000, Form1, LightControl 1