There are six possible causes.
- Is the [USB A, USB B, DIGITAL, LINE, PHONO, RETURN AUX] selector switch set to the proper position?
Turn the [USB A, USB B, DIGITAL, LINE, PHONO, RETURN AUX] selector switch and set it to the channel's input source.
- Are connection cables properly connected? Connect the connection cables properly. For details, see "Connecting input terminals" and "Connecting output terminals" in the operating instructions.
- Is [MASTER LEVEL] set to the proper position? Adjust [MASTER LEVEL] so that the master level indicator lights up to the orange indicator at the peak level.
- Is [TRIM] set to the proper position? Adjust [TRIM] so that the channel level indicator lights up to the orange indicator at the peak level.
- Are terminals and plugs dirty? Wipe any dirt off terminals and plugs before connecting.
- Is [MASTER ATT.] set at for example [-12 dB]? Switch [MASTEROUT][ ATT.] at the [UTILITY] screen. For details, see "Changing the settings" in the operating instructions.