Ok, just found out that the S38 wasn't able to clone TOCs at all (because it ejects the disk on power recovery). I'm sorry I didn't find it before posting, but searching S38 on the website returned no interesting results so I had to browse every minidisc.org page to find what I want... So now I can't find service/test modes for my MZ-N510 & N707 players. I found several pages telling to put hold on, to hold PLAY, VOL- or GROUP while pressing ff, ff, rev, rev, ff, rev, ff, rev, pause, pause. But all these don't work on both 510 & 707. And actually I don't remember any page saying this would work for these devices. Do you have an idea how the test mode can be accessed on N510/707 devices ? Edit : 'got it ! If you have a 510 you'll have to set hold on, hold STOP on the device and press ff/ff/rev/rev/ff/rev/ff/rev/play/play on the remote.