Update by user Apr 05, 2020 I wrote twice to Uniden about the Bearcat 210 scanner scheme and so far silence Original review posted by user Apr 03, 2020 Hello I have a Uniden Bearcat 210 scanner. I used it until 2018. Super equipment. Then he stood unused for many years. When I turned it on, it doesn't work. I have the knowledge to bring him back to work, but I need a clear diagram and possibly tuning instructions because after all these years some corrections will be required I also have Uniden radios that have been in operation for almost 40 years and are in working order. Bravo!!!! Please send me this documentation, I think after all these years, it is not covered by the manufacturer's secret Regards Kazimierz