Troubleshooting, Effects / AUX RET B

5 Troubleshooting

Audio signal carries an	Too much low-level noise in	Engage the channel’s high-pass
unwanted hum.	the mix.	filter by pressing the HPF
		switch.
	Interference from appliances	Engage the channel’s high-pass
	such as air conditioners.	filter by pressing the HPF
		switch.
	Not using TRS cables.	Make sure you are using 1/4”
		TRS cables.

Microphone level is too low.	Phantom power is not	Turn on phantom power using
	turned on.	the switch on the rear panel of
		the mixer.
	Microphone is damaged.	Test the microphone on other
		audio devices. If you detect
		damage, contact the
		manufacturer or dealer.

No or low sound from a	Channel level is too low.	Turn up channel level.
channel.
	Instrument volume is too	Turn up the instrument’s
	low.	volume control. If problem
		persists, check the instrument by
		plugging headphones into the
		instrument’s phone jack.
	Gain is too low.	Adjust the channel’s GAIN
		control.

Internal effects aren’t	Effects level is too low.	Turn up the level using the
working.		EFFECTS / AUX RET B
		LEVEL control in the master
		section of the mixer.
	An effect hasn’t been	Press the EFFECTS knob on
	selected.	the desired effect and make sure
		the SIG indicator is lit.