I have a couple of those lists and the schematics. The problem is that the parts list is forty to forty five years old and I'm not knowledgeable enough to chose a good audio capacitor from the choices available today. I also really dreaded measuring and comparing the old to the new. At least I was smart enough to bring home the bag of old caps. Those will be easy to measure out of the boards. Thanks for the link eiraved.If you don't have one already, google "AK Database" which has a service manual available for this receiver as well as others. All the transistor and semiconductor parts numbers are available there. Kenwood parts lists are one of the easier lists to navigate through.
This link should give you a PDF of the manual.
http://akdatabase.org/AKview/albums/userpics/10007/Kenwood KR-4600-5600 Service Manual.pdf