Peavey M100 manual Troubleshooting Guide, Problem Check Correction

Troubleshooting Guide

Problem	Check	Correction
No sound	Is power switch on?	Turn power switch on.
(no power light)	Is line cord connected to live power outlet?	Connect power cord to live outlet.
No sound (power light on)	Are MASTER and CHANNEL LEVEL controls	Adjust both MASTER and CHANNEL LEVEL
	up?	controls upward to desired level. Check
		speaker connections. Turn mic switch on.
		Check mic or sound source connection.
System hum	Are all line cord ground connections made	Turn the volume down on each channel
	properly on Messenger™ and any auxiliary	starting with channel 1, working through the
	equipment connected to Messenger?	mixer channels to determine if the problem
	Are all connections secure?	is coming from an external audio source,
	Are all interconnect cables shielded, except	such as a malfunction in that source or a bad
		recording.
	the speaker cables?
		We recommend that all units connected to
	Does the system hum when touching
		the Messenger be plugged into the same AC
	microphone?
		power strip.
		Change the microphone cable and/or
		microphone.
Only one speaker works	Are speaker cable connectors secure?	Fully insert connector and/or swap speaker
	Are both MASTER LEVEL controls up?	cables between left and right speakers and
		outputs to check for damaged cables.
Loud howling or squeal from speakers	If it goes away when the CHANNEL or	Reduce microphone volume. Reposition
(known as "feedback" by audio professionals)	MASTER volume controls are lowered, it is	microphone behind or farther from speakers.
	acoustic feedback.	Observe FLS light above EQ and reduce level
	Refer to Avoiding Acoustic Feedback and	of that band.
	Using Graphic EQ sections of this manual.
Sound is distorted	Is the CHANNEL LEVEL at a very high	Reduce CHANNEL LEVEL and increase
	setting?	MASTER LEVEL.

13