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-   -   Klark Teknik DN360 - Power Supply Issue (http://www.wavemusic.com/community/showthread.php?t=14123)

herbalpudding 01-12-2014 07:49 PM

Klark Teknik DN360 - Power Supply Issue
I know this is not the preferred graphic EQ of the Wave board, but I'm sure some folks here will know more about this KT unit than I do.

I was spinning at home where I use the KT DN360, and I suddenly heard a very loud 'pop' while I was mixing. I jumped it was so loud. My speakers were okay but the EQ was no longer working and the power light was off. One nice feature of the KT unit is that it functions as a neutral pass-thru even when there's no power to it, so I do still get sound through my system -- just not equalized.

Anyway, I unplugged everything and took a look at the fuse. It looked fine but I wasn't positive. To be 100% sure I ordered new fuses from Mouser thinking that would fix the problem, but it didn't. Still no power. I tried swapping the power cable with another one, and that didn't help either. I moved it to another outlet, and still no dice.

If I completely disconnect power to the unit and then re-plug it in, the power light flashes for a millisecond before it goes out again. But I can't get power to the unit.

Anyone have any suggestions or recommend someone in the US to contact about this? It looks like the KT service dept is located in Las Vegas now, so I do plan to call them.

Thanks in advance for any guidance you can provide.

pbellsound 01-13-2014 08:26 AM

Where are you located?

herbalpudding 01-13-2014 01:45 PM

Detroit for now.

herbalpudding 01-13-2014 06:17 PM

I just spoke to the service rep, it looks like I figured out my problem. When I opened the box I didn't notice there were two more fuses inside, and sure enough, one of them looks like it was blown.

Another Mouser order, and I think (fingers crossed) I will be back in business.

pbellsound 01-14-2014 07:30 AM

Sounds like KT will take care of you. If you were around NYC, I had a repair shop for you.

However, fuses usually blow when there's other problems. I fear you'll replace the blown fuse just to have it blow again.

herbalpudding 01-14-2014 12:36 PM

If you don't mind me asking, what other problems typically lie at the root of the issue?

pbellsound 01-16-2014 07:38 AM

Fuses in this type of gear are for the power supply. Under normal operating conditions, the current draw isn't high enough to blow the fuse. When something goes wrong (in the power supply) it'll draw more current and blow the fuse. Let's say the power transformer or rectifiers have shorted, and there was no fuse to open and remove the power, a fire would occur.

This is why fuses are called "protection".

Your fuse blew because something else has gone wrong and it did it's job by opening and removing power from the power supply.

DSA.audio 01-17-2014 12:10 AM

Agreed... there may be signs of failure of you look closely...
Sometimes it's not so easy...

herbalpudding 01-17-2014 03:21 PM

Thanks for the heads up. My building has had some electrical issues, so perhaps I will call an electrician to make sure everything is okay on that end.

herbalpudding 01-21-2014 10:45 AM

Well, Paul was right. The new fuses burnt out right away when I swapped them into the unit. On the advice of KT tech support, I tried unplugging the ribbon cable connecting the front PCB to the rear connection PCB and turning the unit back on. That burnt out the same fuse.

Looks like something more serious is going on with this unit. I might be out of my depth here -- might be time to throw it on eBay and call it a day.

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