service manual and BOM for Pearl:
http://www.passdiy.com/pdf/pearlphono.pdf
grawk: the Xono has a balanced output, yes, but it's not generated how you might think. Here's a schematic of the MM portion of the Xono (edit: not the exact circuit, but same topology):
http://www.rstaudio.de/AlephOno/Rev2/AlephOnoMM.pdf
The circuits are indeed different, this is a common misconception.