TNX A LOTTTT u saved my day this worked on mi r700. so i think that should work on any sony minidisc from the mz series... also,.. i dont think thats the recording head as some say, i think its more like an erasing head, like in cassette walkmans.. but im not really sure... again... tnx... my minidisc is alive againt... ps: how you say it walkmans or walkmen??? interesting question... LOL,... anyway sorry about my rusty english