Jands series 920 bias setting?

Ive just repaired a Jands series 920 for a mate but it needs biasing,I tried Jands.com support for some help but they only have an instruction manual with schematics in the back of it,in hardcover for $50,they didn't say if it contained the biasing procedure or not I sent my Mastercard details for the manual adding that I wasn't happy to pay for what is usually a free download and that I repair amps for local garage bands,church groups ect...for free. Ive sent a few emails asking for just the biasing procedure but have not received a reply from any of them? Hows that for customer service? So now I'm on the hunt for this info,any help would be greatly appreciated.