Question about Nakamichi SoundSpace 5 Shelf System
I have my Sound Space 5 on and suddenly it was disconnected from power outlet in the wall. After that it is dead. What can I do?
You didn't mention why it was disconnected and this may have only showed a failure that was going to happen anyway.
There may be an internal fuse that was just tired but it will require some disassembly if there is no back-panel fuse holder evident.
Most all consumer electronics use a more efficient type of power supply called 'switched mode' (SMPS) and they are fussy by nature. In your case, the supply was probably close to failure and it was only working because it was plugged into AC but now unable to restart.
You might be able to jog it into working again by repeatedly plugging and unplugging the AC and watching for any signs of life. If an LED somewhere on the front panel turns on, leave it plugged in then. This may not work but won't hurt anything either.
Posted on Jan 02, 2009
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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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