hifi engine

Kenwood tuner KT-7020 to Japanese mode

I own a tuner from Onkyo KT-7020 which was also on the market in Japan. I want this European version changed to a Japanese version meaning for reception of 76-90Mhz. In the service manual at page 10 there is function for Diodes and Switches B0, B1, B2, B3. I'm not sure where they can be found and what to set. I hope some of you have good knowledge of schematic diagrams and can help me what I actually should do. The service manual can be found on this site.