Question about Niles SI-1230 12-Channel Amplifier
Chances are the main transistors or whatever powers channel 5 and 6 have shorted out. Fuses blow like this when there is an overload and these power types do that a lot. If it uses transistors, then a ohm meter will show them up quick. Because it will be just like you have touched the test probes together when you put them on the terminals, with the meter on the 1K setting. For the reason these parts are just acting like pieces of wire instead of doing their job.
Posted on Mar 19, 2011
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Posted on Jan 02, 2017
Tips for a great answer:
Generally speaking, an amp protects itself from heat, shorts, overloads and operator exuberance by refusing to turn on or stay on.
Overloads can be from excessive periods of high output or marginally low impedance loading by the speakers; and shorts would be wiring issues or a speaker blowing up.
You should be able to feel if it's hot. WHY is it overheating? Make sure it has sufficient ventilation on all sides and that vent holes are not blocked by dust balls. Ensure the fan (if equipped) is running as designed (some only operate on demand). Clean dust and debris from it.
If the amp comes back on after cooling, you're lucky. They only have so many self-protection cycles in their lives so continuously resetting or cycling their power without addressing the cause can do more harm than good.
If it protects immediately on a cool power up you should disconnect the speaker connections and try it 'naked'. If it comes up then diagnose which lead(s) are shorted. If it does not come up the problem is internal and should be left to an experienced and competent hands-on tech.
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