NAD c390dd - Special Function Operations; Factory Reset; Enter into Bootloader

SPECIAL FUNCTION
Function Keys Notes
Factory Reset Source Down +Source UP
Check MCU Version Enter(press 3second)
Check DSP Version Enter (press 3second)
VFD Test Source Down + Right
Enter into Bootloader Standby+Switch on
Check USB Card Version Enter(press 3second)
Change Input source name Source Down(press 3second)