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
Thanks for the suggestion. Just tried that and got an immediate reply saying that they will see what they can find to help!
Pure Audio have replied informing me that, in terms of the original design/circuit diagram there is a corrupt disc issue, so it looks like they can't help.

Does anyone else have any information that can help ? This is a very expensive piece of kit that is heading for the trash can, at the moment....
You might contact Mike Powell from Verastarr.  He knows a lot of people in the industry and he might know someone who can help you out. Good luck.  
roncalvert, the tech is just going to have to fly blind. It could be something simple like a bad solder joint or connector. At this point you have nothing to lose.
Yes, he is doing his best, but no luck so far. 

Thanks chayro, I shall try to get in touch with him