McCormack DNA-500 one channel out

kaboom · 18th June 2006, 11:55 PM

The right channel seems to have gone out on my McCormack DNA-500 amp this afternoon. There's only a smidgen of distortion coming out of the right speaker and the heatsinks stay cold on the right side vs the left side being warm to the touch. Any advice other than sending it back to the manufacturer? This really bites as the amp is only 2 months old. (I bought it new.)

anatech · 19th June 2006, 12:37 AM

Hi kaboom,
Did you kill it, or did it die of it's own problems?

To keep warranty (if you bought it from a proper dealer) you must use the warranty network. If you open it and mess with it, it's your problem from now on.

If you killed it, it must be repaired in the warranty network to regain warranty coverage even though you are paying for the repair.

If you got it via other methods, it's a question of whether you want it repaired properly or not. So send it in, or take it to a good service guy.

I am assuming you are not a technician or we would have more information.

-Chris

Tony · 19th June 2006, 02:20 AM

hey anatech,

been looking for technical info or maybe schematics for this amp, you know where i can find it, just curious...

kaboom · 19th June 2006, 02:30 AM

The amp died on its own. I simply turned it on, heard some crackling noises out of the right speaker and that was it. It worked fine the last time I played it about a week ago. There is still distortion that will come out of the right speaker, but nothing that resembles music.

Unfortunately, I'm not a technician, but I have a friend who knows which end of the soldering iron is hot. Thought maybe there was something he could check out. Guess I might as well start looking for the box.

sj

anatech · 19th June 2006, 02:37 AM

Hi Tony,
Sorry, I don't have them. There are times when an amplifier is newly out where documentaton lags by 6 months or so. I've had to make do with engineering diagrams more than once in my life.

At least those who sent them did that at least. (& I was doing warranty!) I have no connection with McCormack. I am speaking of other brands, years ago.

Hi kaboom,

Quote:

Guess I might as well start looking for the box.

I know you want it working right now, but that is the best course of action. Don't even pop the cover, they can tell.

If you have ever had to explain to a customer that their product is not under warranty due to work done by a friend, you would understand my position. It's worse when the customer claims ignorance and you can prove that's not the case. At that point, I don't even give the guy a break for being honest.

Never lie to your service guy. It does not pay!

-Chris

Robert F · 19th June 2006, 02:47 AM

Hi,

I own a DNA .05 Deluxe. Have you checked the rail fuses on the dead channel ?:-). It sounds like you have blown the fuse on one rail.

Rob.

kaboom · 19th June 2006, 03:40 AM

Robert F,

No, I didn't check the rail fuses but sounds like that could be the problem. If all else fails, read the owner's manual :-)

I'll pop the cover first thing in the morning. Thanks!

sj

kaboom · 19th June 2006, 03:30 PM

Well, I replaced the rail fuses and the right channel is still out. So now I get to ship the amp back to McCormack at my expense. Guess it wouldn't be high-end audio if it was reliable.

Thanks anyway guys for the help.

Kaboom

Robert F · 19th June 2006, 09:18 PM

Bad luck! Worth a shot anyway.

Regards,
Rob.

Tony · 20th June 2006, 02:04 AM

anatech,

thanks, i'm interested to find out about the technology used...not nesscesarily the full circuit details...

18th June 2006, 11:55 PM	#1
kaboom diyAudio Member Join Date: Jun 2006	McCormack DNA-500 one channel out The right channel seems to have gone out on my McCormack DNA-500 amp this afternoon. There's only a smidgen of distortion coming out of the right speaker and the heatsinks stay cold on the right side vs the left side being warm to the touch. Any advice other than sending it back to the manufacturer? This really bites as the amp is only 2 months old. (I bought it new.)

19th June 2006, 02:20 AM	#3
Tony diyAudio Member Join Date: May 2003 Location: Palatiw, Pasig City	hey anatech, been looking for technical info or maybe schematics for this amp, you know where i can find it, just curious... __________________ http://www.electronicslab.ph/forum/i...?topic=32688.0

20th June 2006, 02:04 AM	#10
Tony diyAudio Member Join Date: May 2003 Location: Palatiw, Pasig City	anatech, thanks, i'm interested to find out about the technology used...not nesscesarily the full circuit details... __________________ http://www.electronicslab.ph/forum/i...?topic=32688.0

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19th June 2006, 12:37 AM	#2
anatech diyAudio Moderator Join Date: Jun 2004 Location: Georgetown, On	Hi kaboom, Did you kill it, or did it die of it's own problems? To keep warranty (if you bought it from a proper dealer) you must use the warranty network. If you open it and mess with it, it's your problem from now on. If you killed it, it must be repaired in the warranty network to regain warranty coverage even though you are paying for the repair. If you got it via other methods, it's a question of whether you want it repaired properly or not. So send it in, or take it to a good service guy. I am assuming you are not a technician or we would have more information. -Chris

19th June 2006, 02:30 AM	#4
kaboom diyAudio Member Join Date: Jun 2006	The amp died on its own. I simply turned it on, heard some crackling noises out of the right speaker and that was it. It worked fine the last time I played it about a week ago. There is still distortion that will come out of the right speaker, but nothing that resembles music. Unfortunately, I'm not a technician, but I have a friend who knows which end of the soldering iron is hot. Thought maybe there was something he could check out. Guess I might as well start looking for the box. sj

19th June 2006, 02:47 AM	#6
Robert F diyAudio Member Join Date: Jul 2005 Location: Auckland	Hi, I own a DNA .05 Deluxe. Have you checked the rail fuses on the dead channel ?:-). It sounds like you have blown the fuse on one rail. Rob.

19th June 2006, 03:40 AM	#7
kaboom diyAudio Member Join Date: Jun 2006	Robert F, No, I didn't check the rail fuses but sounds like that could be the problem. If all else fails, read the owner's manual :-) I'll pop the cover first thing in the morning. Thanks! sj

19th June 2006, 03:30 PM	#8
kaboom diyAudio Member Join Date: Jun 2006	Well, I replaced the rail fuses and the right channel is still out. So now I get to ship the amp back to McCormack at my expense. Guess it wouldn't be high-end audio if it was reliable. Thanks anyway guys for the help. Kaboom

19th June 2006, 09:18 PM	#9
Robert F diyAudio Member Join Date: Jul 2005 Location: Auckland	Bad luck! Worth a shot anyway. Regards, Rob.

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