Nikko Popping

HSEtech · 13th November 2012, 10:22 PM

I have a Nikko NR-1015 that when I first powered up sounded ok, after about 10 min. a popping started in both speakers then it cut out then returned to the popping. after about half hour the loudest static I ever heard started in both speakers and no matter what I did it didn't stop. The only thing that shut it up was power down. started it up once since then and same thing.......any ideas??????

Mooly · 14th November 2012, 06:20 PM

If its happening on both channels then the problem could be power supply related. Maybe a dry joint somewhere or a regulator (either discrete or IC) doing something strange.

You need to narrow it down a lot more. Is the noise affected by the volume control for example, does it happen on any input etc etc

HSEtech · 14th November 2012, 08:50 PM

The only thing and I do mean the only thing that stops the noise is power off

Mooly · 15th November 2012, 06:27 AM

I would check the power supply, check for any loose fuseholders, check the mains switch and also look at the rails on a scope. If both speakers are affected the PSU is the common factor. It could even be faulty reservoir caps.

Try adding some series resistors to the speakers to lessen the noise while you work on it.

13th November 2012, 10:22 PM	#1
HSEtech diyAudio Member Join Date: Sep 2012	Nikko Popping I have a Nikko NR-1015 that when I first powered up sounded ok, after about 10 min. a popping started in both speakers then it cut out then returned to the popping. after about half hour the loudest static I ever heard started in both speakers and no matter what I did it didn't stop. The only thing that shut it up was power down. started it up once since then and same thing.......any ideas??????

14th November 2012, 06:20 PM	#2
Mooly diyAudio Moderator Join Date: Sep 2007	If its happening on both channels then the problem could be power supply related. Maybe a dry joint somewhere or a regulator (either discrete or IC) doing something strange. You need to narrow it down a lot more. Is the noise affected by the volume control for example, does it happen on any input etc etc __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

15th November 2012, 06:27 AM	#4
Mooly diyAudio Moderator Join Date: Sep 2007	I would check the power supply, check for any loose fuseholders, check the mains switch and also look at the rails on a scope. If both speakers are affected the PSU is the common factor. It could even be faulty reservoir caps. Try adding some series resistors to the speakers to lessen the noise while you work on it. __________________ ------------------------------------------------------- *A simulation free zone.* *Design it, build it, test it.*

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14th November 2012, 08:50 PM	#3
HSEtech diyAudio Member Join Date: Sep 2012	The only thing and I do mean the only thing that stops the noise is power off

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