This is an old post, but I thought I’d chime in. I received a similar era Wurlitzer, same issues- didn’t work.
Lord of the rings trilogy story short, I spent a lot of time on it initially to no avail. Even longer story short, I took it apart AGAIN, cleaned it even more throughly and got the service manual for the fine tuning part (believe me this is necessary for dialing in the components.)
These old Wurlitzers weren’t phased out in the mid 80s for No reason-they’re temperamental and require a lot of time and effort to bring back to snuff. After 40-50 years of sitting, they need to be entirely gone through.
I now have a working juke, or so I thought-there is ONE selection that’s playing the b side instead of the selected A side. Headed out to the garage momentarily to investigate