Hyundai H-CDM8019 - Manual (Page 15)

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press and hold F/PS button for more than 3 seconds. The receiver will automatically scan and save stations for that
AM bands.
2. Scan saved stations: press F/PS button once to perform the scanning functions. In FM mode, press F/PS button
and the stations in that FM band will be scanned; press this button in AM mode and scan that AM band stations.