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JDS O2 blew an op-amp (pic inside). Question regarding replacement.
Sep 28, 2014 at 10:25 AM Thread Starter Post #1 of 11
Airwolf

Airwolf

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I got out of the shower and smelled the oh so familiar smell of burning electronics in my apartment.  After some blood hounding, I traced the smell to my JDS O2 headphone amp.  When I picked it up, it was hot to the touch.  I opened it up and found this:
 

 
 
I ordered some new NJM4556AD op-amps from mouser.com and I was just going to put in a new one.  How likely is it that this caused damage to the other components of the amplifier?  Everything else looks fine, visually, but I am a bit concerned that something bigger is going on here...
 
Sep 29, 2014 at 12:45 AM Post #2 of 11
airwolf said:
  I got out of the shower and smelled the oh so familiar smell of burning electronics in my apartment.  After some blood hounding, I traced the smell to my JDS O2 headphone amp.  When I picked it up, it was hot to the touch.  I opened it up and found this:
 

 
Click to expand...

I have no idea what to do sorry.. However, wow! Was not expecting that. 
 
Sep 29, 2014 at 12:59 AM Post #3 of 11
Did you built that amp? Better look for answers on this section:
http://www.head-fi.org/f/6/diy-do-it-yourself-discussions
 
Sep 29, 2014 at 2:21 AM Post #4 of 11
thecourier said:
  Did you built that amp? Better look for answers on this section:
http://www.head-fi.org/f/6/diy-do-it-yourself-discussions
Click to expand...

 
I didn't build it myself.  I bought it from JDS Labs.  I think I am going to email them and see if there is any additional troubleshooting I need to do.
 
Sep 29, 2014 at 11:48 PM Post #5 of 11
That is an unusual thing to happen to a JDSlabs O2 amp for sure.  I recommend you contact John at JDSlabs before trying to replace the opamp.  He is a great guy to deal with and the customer service is really excellent at JDSlabs.  Best of luck.
 
Sep 30, 2014 at 11:53 PM Post #7 of 11
thecourier said:
  Okay, please let us know if you are able to solve your issue. 
Click to expand...

 
Will do.
 
As of right now, I am looking into finding a new amp.  Most likely a used Schiit Asgard 2.
 
Oct 2, 2014 at 8:49 PM Post #11 of 11
lustandwet said:
  How can it happen ? Did the people in the JDS say something ?
Click to expand...

 
From what I have been told, it is because my HE-400's were doubling the output current specifications of the op-amps.  I bought a used Schiit Asgard 2 off of eBay to replace it.
 
John from JDS kindly replied to my email and said that I should replace both op-amps at the same time and monitor the temperature of the amp for a few minutes before connecting headphones to it.  Other than that, it should be fine.
 
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