[TheTodd]

Hello,
 
   I just recently acquired a pair of Sony MRD-10RNC and its missing the Positive and Negative leads for the noise canceling.   I was just wondering if someone could maybe take a pic of the board inside for me so I know where to solder some new leads onto the board and get them working properly.  I tried searching but couldn't find anything
 
 
Edit: I ended up finding where the positive lead goes for the battery now I just need to figure out where to solder the ground wire. I cant just solder it to any ground or neutral cause ill get interference out of the left or right speaker.  Again a pic would be great and very helpful or I guess I can just start trying out different grounds until I get it lol
 
I have tried out different grounds and still cant find out exactly where it needs to go.  when I turn the noise canceling on I get a faint hum out of the right side and the music at that point sounds distorted badly and just all around horrible. when I turn the noise canceling switch off and both the left and right side sound normal like they should.
 
 if anyone can provide me with a picture of where the leads are soldered to from the battery compartment that would be much appreciated.  

 

[TheTodd]

Bump

 

[vantt1]

Darn, if only I had the 10RNC - I got the circuit-free 10R instead. 
 
Firstly, how were the positive and negative leads missing? Did they break? Any pictures?
 
The lithium ion battery's negative terminal is a good ground for non-audio applications.

 

[TheTodd]

I bought them off eBay for super cheap. I have added the terminals to it and got the actual noise cancellation to function but it sounds all groggy and horrible and there is a hum. so I know im on the right track. other than that they sound great when the noise cancelling switch isn't flipped

 

[vantt1]

  I bought them off eBay for super cheap. I have added the terminals to it and got the actual noise cancellation to function but it sounds all groggy and horrible and there is a hum. so I know im on the right track. other than that they sound great when the noise cancelling switch isn't flipped

Is there a chance that the circuit board was faulty in the first place, and that's why the terminals were removed?

 

[TheTodd]

Yeah I would certainly say there is that chance, I just would have thought the original owner would try to utilize his/hers warranty.   I would love to find out those solder locations so I could be sure either way.  I have a felling that I may have to scrounge up the money to buy another pair, ones that are working good. I just don't want to spend that type of money on something I probably wont get a return on.