how do I reset a mz-n505 back to it's default settings? I thought I found some instructions but they didn't work. I tried to make some adjustments to mine since it would no longer record even on new disk. I was about ready to trash it, but I figured I would at least try this 1st. It may be a matter of the heads being dirty too, so if someone knows what you use to clean the heads let me know. Thanks for anyhelp offered.