Niles SI-250 オーナーマニュアル

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When there is a problem, consult this guide first. If the problem persists, or you 
have additional questions, call your local Niles dealer or Niles Technical Support 
at 1-800-BUY-HIFI (289-4434) or (760) 710-0992. The most common problems 
relate to hook up. Call from your telephone extension nearest the system.

No sound on 
one channel 

Short circuit or loose wire at the speaker or amplifier terminals. 
Check that the connections are secure and that there are no 
loose strands of wire crossing from the positive to the negative 
terminals at the back of the amplifier and /or the speaker.

Short circuit or a break in the speaker wire. Disconnect the 
speaker wire at both ends, separate the 2 conductors at both 
ends and test with a meter for a short circuit. If there is no 

s

hort, 

connect the two conductors at one end and test with a meter for 
continuity.

Speaker is not working. Connect the speaker to a channel that 
plays another speaker. Audio cable to input is bad. Connect 
another cable that is known to be good.

No sound on 
both channels

Audio cable to the main inputs is bad. Connect another cable that 
is known to be good.

Hum from the 
speakers 

Hum may be caused by a ground loop between two of the other 
components in the system. To test for another ground loop, try 
reversing the ac plugs of each of the components in the system.