LP-615 Upgrade Firmware of Volume Memory:
USB system: FAT/exFAT (do not support NTFS)
1. Copy it to the USB drive (do not change the software name).
2. Add 1-2 songs (MP3 format) to the USB drive.
3. Insert the USB drive into the amplifier.
4. The automatic update will begin—do not press any buttons or remove the USB drive.
5. The indicator light will turn red when the update is complete.
6. Disconnect the power supply and restart the amplifier
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