Good luck on trying to find that manual. I've been looking for an Owners Manual now for sometime for a KA-5002 and still have not found one! :sigh:
Hifi engine only has the schematic for your model but they do have an Owners Manual for a KA-2000 that you could possibly use as a possible reference? :scratch2:
Check with Stereo Manuals website, they just might have your particular model, I know they don't for mine.