TOA Electronics I6 AW ICT guide

12. Troubleshooting Guide

Symptom

Possible Cause

Action

No Output From Speakers	Broken Speaker Cables(s)	Check the electrical continuity of
		the loudspeaker cables, and
	Amplifier	replace if necessary.
	Amplifier	Check the gain controls on the
		Check the gain controls on the
		amplifier are turned up.
		Be sure the amplifier is receiving
		an input signal (check the
		“signal” indicators on the amp).
		Connect the loudspeaker cable
		which has no output to another
		amplifier channel you know is
		working, make sure signal is fed
		to the new amplifier channel. If
		output is obtained from the
		loudspeakers(s) then the
		problem is with the amplifier
		channel or input signal leads. If
		this is not the case then the fault
		may lie in the cabling or the
		loudspeaker.
Intermittent Output	Poor Connection	Check the loudspeaker cabling
		has a good electrical connection
		with amplifier outputs and
		loudspeaker inputs. A bad
		connection can increase
		resistance which will
		substantially reduce the output,
		or make “cracking” noises which
		are unrelated to signal content
		If using multi-strand loudspeaker
		cable, be sure no strands of
		cable are causing short circuits
		between the positive and
		negative terminals of the
		amplifier outputs and/or
		loudspeaker inputs.
Poor Low Frequency	“Out of phase” connection	When two speakers are
Output		connected “out of phase”, the low
		frequencies will virtually be
		cancelled out. Check the
		connections at the
		amplifier/speaker paying
		attention to polarity. (see section
		4).
Irregular sounds such as	Poor system grounding	Check and correct system
buzzing and humming		grounding.
emanating from the
loudspeaker	Faulty electronic device in	The speaker cannot generate
	the signal chain	these sounds on its own. It is
		most likely there is a fault with a
		piece of electronic equipment in
		the signal path.