Some parts were replaced and maintained. Internal / external basic cleaning, mechanical part cleaning, reassembly, main belt replacement, counter belt non-defective replacement, earphone port cleaning, microphone port cleaning, head part cleaning and mirror finish, roller non-defective replacement & cleaning. Cleaning of volume parts. Azimuth adjustment, speed adjustment. Record, play, stop, fast forward, rewind, pause, auto shut off. Tape counter, speaker sound output. Long-term operation test, hearing test by actual listening. A measuring instrument is used for speed adjustment, wow and flutter measurement, and azimuth adjustment. The repair process uses appropriate chemicals and oils. Please ask us before you open a case. We will do our best to solve a problem. If you find any problems/defections with our products, please feel free to contact within 1 week from the day when you received and allow up to 24 hours to answer your question. International Buyers – Please Note. We do not accept reasons such as not knowing. We do not mark merchandise values below value or mark items as “gifts” – US and International government regulations prohibit such behavior. Record, play, stop, fast forward, rewind, pause, auto shut off, Tape counter, speaker sound output.