Just an update. I got the unit back in about one week, so pretty quick. They replaced what they call the OP assembly. I have used it rather extensivelyafter the repair, but until now, it seems to work fine again. So after this second repair (the first concerned the display), I hope it will work now without problems for a long time. I have an MZ-R30 too and indeed this one has worked and still works without any problems. Thanks for the answers.