Like most of the posters, it's been a while since I used a cassette deck. Most Nak decks had a bias setting procedure to optimize recording on blank tapes. I never owned the LX-5 so I don't know if it has this feature. From memory, having set the tape type and put the deck into record mode, you start the test tone and start recording. You then adjust the bias to achieve "0" on both channels. On at least one of my Naks this required using a small screwdriver.
If you haven't already done so, you might try emailing Nakamichi and inquire whether it would be possible to purchase a manual, or whether one is available in a pdf file.
Doug
If you haven't already done so, you might try emailing Nakamichi and inquire whether it would be possible to purchase a manual, or whether one is available in a pdf file.
Doug