Niles Audio SI-1260 manual Troubleshooting Guide, Symptom, Possible Causes And Test Procedure

SYMPTOM	POSSIBLE CAUSES AND TEST PROCEDURE
Very low or no sound on	1. Bridging Switch is in wrong position. Check your con-
some or all channels.	figuration worksheet for the correct setting and verify.
	2. Audio cable to the input is bad. Connect a cable
	known to be good to the non-working channel.
Hum from all of the speakers.	Hum can be caused due to a ground potential differ-
	ence between connected components (especially those
	connected to antenna or cable TV feeds).
	1. Check for faulty cables; faulty source signals; an
	ungrounded phono system, cable feed, and/or a
	defective component.
	2. Reverse the AC plug of components with non-polar-
	ized plugs.
	3. Test the AC receptacle using a Ground Tester.
Sound is distorted on one or	1. DIP switch(es) are not in the correct position(s).
more channels at normal
	Check the worksheet and verify all settings.
volume.
	2. If the channel pair LED is Yellow, then the channel is
	being overdriven (volume set too high on the pream-
	plifier). The channel volume level should be re-cali-
	brated to avoid this condition (refer to page 25 for infor-
	mation on Using Level Controls as Limiters).
No sound on any channels	Amplifier has an internal defect requiring service.
and power LED is slowly	Contact your Niles dealer for service information.
blinking.
Bass is weak and stereo	1. Check that the Bridging Switch is "OFF". If two adja-
sound is "phasey".	cent channels are connected normally but the bridg-
	ing switch is set to the "BRIDGED" position, the two
	speakers will be out of phase.
	2. The speakers are wired out of phase. Recheck polar-
	ity and reverse the connections on the back of one
	speaker if necessary.
A speaker connected to a	Check that the Bridging Switch is "ON".
bridged pair of amplifier
channels sounds weak.

TROUBLESHOOTING GUIDE

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