I just acquired used Yamaha DX7 II FD. All internal voices and pathces are messed up. Also, according to the manual, there are some really cool presets in "Performance" patch bank, but that's gone too and has been replaced with some cheezy sounds.
Here are the pressing issues and questions
1 - How do I recover Internal Memory (32+32)
2 - How do I recover "Performance Memory"
3 - What is the floppy drive for?
I don't have any of the ROM cartridges (I've herad they do contain original factory presets)
Being an analog guy all my life, the digital FM stuff is uncharted teritory for me....
I have a home made manual that isn't clear enough on basic stuff, so any help or advice will be greatly appreciated... If anyone can explain the basic steps in plain english...it'll be much better and easier than to sift through the manual or the web.