I bought the SONY MZ-1 not long after it first came out. I am considering getting the unit repaired. I gave up using it many years ago when I experienced a problem of the disc not being read.
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After inserting the MD, TOC READING! would be annunciated followed by DISC ERROR.
After searching and reading the forums it appears I might need getting the optical pickup block replaced. I would like to think I could replace the block myself but the service manual describes an apparent lengthy testing and adjustment procedure after installation. I have downloaded the original service manual and subsequent corrections.
Thanks for giving me guidance whether to pay for the repair or sell it. (SONY's first MD player to the consumer market) I have no idea if it holds any value in its current state.
PS The batteries need replacing although I would be happy just using the 10.5 power adapter.