That looks like a fairly easy repair. Your service manual lists most of the components so finding replacements for the damaged ones shouldn't be too difficult. That diode seems to have a broken lead, you may be able to clean the corrosion off of it and bridge the lead with a bit of wire and some solder. Same thing for any traces that have broken, just scrape away the solder mask, and bridge the damaged area with a bit of fine wire. I would get it running on batteries first, then consider using an ac adapter. Just be sure that the adapter you choose is properly isolated from the mains and earth. I don't expect this will use much current, so you shouldn't have difficulty finding one.