ADM - 20.4 - Troubleshooting

The Standby/On indicator does not light when the ON/STANDBY button is pressed.

• Bad connections or wiring.
  Check if the power cord is properly connected. If the indicator still does not light, turn off the ADM-20.4, disconnect the power cord, and contact the dealer from whom you purchased this unit.

The Power indicator lights blue, but no sound comes from the speaker or the volume is very low.

• Bad connections or wiring.
  Check connections, speaker cables, etc.
• The INPUT LEVEL control is set to MIN.
  Turn the INPUT LEVEL control to adjust the input level.
• The settings on the control amplifier or preamplifier are wrong.
  Check the settings on the control amplifier or preamplifier.

The left and right sounds are unbalanced or reversed.

• Bad connections or wiring.
  Check connections, RCA-type audio connection cable, etc.
• The polarity of the speaker cable is wrong.
  Check the polarity of the speaker cable.

The TRIGGER switch does not react.

          Check that the TRIGGER switch is effective.
          Turn on the power supply once.