Stahl-tek Vekian - help please!


I have a Stahl-tek Vekian DAC which has hit a problem. The guy trying to fix it for me is "flying blind" with no circuit diagrams or anything to guide him. Does anyone know where he can access some technical data to help fix the problem? (basically a crackle and hiss emerging from the right output channel)

There is a Facebook page but no apparent activity on it to help, so any suggexstions gratefully received....
roncalvert
The company has apparently been "voluntarily dissolved", which means that the owners shut it down and sold the assets, which were used to pay off any debts.

In other words, apparently Stahl-Tek is no more.  

Duke
I know I have said this before but I don't buy from botique manufacturers for this very reason.
Contact Purist Audio Design in Clute, Texas. They did most of the distribution and know where to contact the designer, who is quite brilliant.
Thanks for the suggestion. Just tried that and got an immediate reply saying that they will see what they can find to help!