Audio Desk Systeme Glass voltage question.

I need to replace the internal voltage regulator used inside my cutting lathe but
it seems to be a mystery what the internal voltage is of this unit.
I've tried contacting the manufacture in Germany but get no response back.
All parts inside have no info on what or value used.
it does use a 3 amp power fuse.
Thanks Mike

I would contact the cable company and ask them.The owner of Audio Desk doesn't respond to emails. I learned this my self and the cable company helped me out.