CD/USB Receiver Firmware Update Guide Introduction Firmware Update Procedure • This document describes the procedure and precautions for upgrading the CD/USB receiver fi rmware. 1. Connect the “Update Media” to the CD/USB receiver. • If an error occurs while you are updating the fi rmware, the CD/USB receiver may 2. When the audio fi le starts playing or “NO MUSIC” appears, press the [MENU] become unusable. Be sure to read the following procedure and precautions button to ente