Kindly, Konica Europe GmbH granted me the permission to publish the user's manuals for the Konica SLRs on these internet pages. Thank you to Konica! Just now, the multi-lingual manuals are being scanned.
As soon as the scanning is finished, the manuals will be available here as pdf files for free dowonload.
For the Autoreflex T3N, you can meanwhile use the user's manual for the Autoreflex T3 that is available already. The cameras are very similar, the manual for the Autoreflex T3 will give answers to most of your questions.
Otherwise, you can find some English language manuals for Konica SLRs on Mike Butkus's site.