Hartke Kickback 12 electronics diagram

Hello all -

A bit of an oldie I suppose, but I have the above mentioned Hartke combo (SamsonTech), bought as new around 1998 or so. It hasn't been working for a few years, but now a colleague of mine, with experience in repairing amps, televisions and radios, has offered to take a look at it for me. He asked if I had any way of getting my hands on a diagram of the print card, so here I am asking you guys the same. Does anyone have any idea where I could get such a thing?

Thanks in advance.