Question about Nakamichi SoundSpace 5 Shelf System
My wife stapled a speaker wire and obviously shorted something in the system. The receiver appears to be functioning, but I'm getting no sound from either speaker.
I've got what looks like 3 rails of 20VDC coming out of the power supply - I don't have a schematic, so I'm flying a bit blind here, but that seems about right. I'm guessing the malfunction is in the amplifier, but I've not yet taken the back off.
Hi Ho There,
The speakers can be driven to make sound by several different power devices, These devices can be FET's or Transistors, or a output Integrated circuit.
All of these devices can be damaged by shorting the speaker wires I suspect thats what has happened in your case...
The manufacturers provide internal p[rotection and this can be in the form of a fuse which will beaccessible from the ouitside of the case.
Have a good look to see if there are any fuses there that are blown that you can replace yourself...Please replace with the same value type as fitted already...
If you cant locate any blown fuses then it will need to be taken to a service person to strip the cover off to see if there are any fuses that can be replaced inside....otherwise it will need to be repaired especially if the output device is damaged in any way..
If you are lucky it should be just a fuse as the "wifey staple" would most likely have shorted out omly the one channel, and as you say both channels dead then its more likely to be a fuse that supplies all the output stage devices that has disrupted..
Posted on Dec 25, 2007
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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.
In your case it is obviously not heat, speaker load or excessive volume at the moment.
You could unplug it then turn it upside down and shake it to see if something metallic is rattling around inside it. Maybe open it up and sniff for burnt components, but even if you see something obvious and replace it you migh not know what the original cause for failure was, so you may just be wasting time and sacrificing new parts.
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