The SONY CDX-A250 allows you to save up to 6 stations per radio band (FM1, FM2, FM3, MW, and LW) on the numbered buttons 1 to 6. Unlike some newer car radios, this model does not have a dedicated function to delete a preset station. The only way to "free up" a button is to reuse it by saving a new station, which will automatically replace the old one.
To replace a saved station on a shortcut of the SONY CDX-A250, follow these steps: first, turn on the car radio and select the radio function. Then find the new FM or MW station you want to save using the SEEK button to scroll through the frequencies. Once you have received the desired station, press and hold the numbered button (1 to 6) corresponding to the shortcut you want to update until the display shows "MEM". You will hear a beep confirming the recording. At this point, the new station has replaced the old one on that button.
To avoid accidentally saving a station on your preset shortcuts, simply never hold down the numbered buttons. A short press (less than a second) on a button allows you to access the already saved station without changing the preset. You can change stations with the SEEK button without risking losing your existing presets.
The SONY CDX-A250 also has a BTM (Best Tuning Memory) function that automatically saves the 6 strongest received stations for each band. If you activate this function by pressing and holding the SENS/BTM button until "BTM" flashes, the device will replace all your previous presets with the newly detected stations.
