This manual provides instructions for the Yamaha DOU-10 Disk Orchestra Unit, a MIDI disk player. It includes important safety warnings regarding power connections, extension cords, and potential hearing damage from high volume levels. Users are advised to use only recommended power supplies and to avoid placing the unit where cords could cause tripping hazards.
The manual states that the minimum wire size must be 18 AWG.
The average life span of this type of battery is approximately five years.
You should try to relocate or reorient the antenna.