Line Magnetic LM215 CD player - internal adjustment?


I'm wondering if anybody knows what the adjustment pot is for that sits inside at the rear - close to the COAX and Optical outputs? I thought it may have been a volume adjustment, but it doesn't appear to affect that - or a channel balance. It has a 360º range. 
I'm running into an MHDT Atlantis via Coax and then into a Shindo Partager pre.  
I can't find anything online or in the manual.

Peter
 
rennie_perth
Suggest maybe contacting Jonathan Halpern at Tone Imports (US distributor for LM) and if he doesn't know offhand can probably find out for you, I have found him to answer emails timely.