I have a Nak 481, but no owner's manual/user's guide. I have a service manual that I downloaded, but I have never found the other manual online?????? What gives, one would think they would be a fairly common item. I have also tried to purchase an original and have struck out there as well. The other manual i would like is an owner's manual for a Marantx 2040 Cassette deck.
I have a Nak 480 Owner's Manual, and it should suffice. PM or e-mail me if you want a copy, it's about 3.2 MB.