NAD C 326BEE Volume/channel problem

[mushroomgodmat]

Hi All,

My trusty Nad amp is playing up.

Basically one of two things are happening....The volume is dropping, or/and one channel is cutting out.

Im pretty sure its showing signs of both.

Any idea what the problem might be of if its fixable?

cheers!

 

[rayma]

My trusty Nad amp is playing up. Basically one of two things are happening....The volume is dropping, or/and one channel is cutting out.

Probably dirty contacts in a switch or connector somewhere. There may be more than one place this is happening.
Use Caig Labs D5S-6 cleaner to renew contacts, available at RadioShack.

 

[lineup]

I had the same with my NAD 316BEE.

There is cable that goes to the potentiometer. It is bad contact.
When I pressed that flat cable firmly into the jack, my problem disappeared.
Try to let the flat cable get better contact.

 

[junior35]

Although the amp is quite young,this issue sounds a bit like it could be dirty contacts in the speaker relays.
Cheers

 

[mushroomgodmat]

Hi Guys,


Gave the contacts a clean - No waiting for it to dry....

then I noticed this.....Cant be good right?

An externally hosted image should be here but it was not working when we last tested it.

 

[east electronics]

If increasing the level a bit solves the problem then YES junior35 is right its the output relay

 

[mushroomgodmat]

for whatever reason I cant edit my post, and it looks like the image didnt post...

Anyway.....Any idea what this is!!

An externally hosted image should be here but it was not working when we last tested it.

 

[Bill_P]

Glue that stabilizes the capacitors against vibration and mechanical shock.

 

[mushroomgodmat]

Cheers all,


after a good clean with some contact cleaner, and a 4 hour dry time its working like a charm!

I could be wrong - but it sounds a little brighter/more lively too.

Glue that stabilizes the capacitors against vibration and mechanical shock.

cheers! I was thinking something might be leaking!

 

[xykapec]

I had the same with my NAD 316BEE.

There is cable that goes to the potentiometer. It is bad contact.
When I pressed that flat cable firmly into the jack, my problem disappeared.
Try to let the flat cable get better contact.

I have this exact problem with my NAD C316BEE.
And it is caused by potentiometer jack as you say.

But after I fix the problem by moving the jack around the problem returns after some weeks.
I can not really pull the jack out, since it is glued with some serious glue.
I want it out to inspect the pins for any sign of oxidation.
Maybe pulling it out and plugging it in will resolve the problem for long time, I don't know.

Any ideas what can I do?
Go by brute force and cut the glue to plug the jack out?

 

[xykapec]

Here is my story of the same issue with NAD C316BEE.

One channel became weak and sometimes disappeared at all.
When I opened the amp and touched the white connector cables that leads to potentiometer of volume, the issue disappeared but not for long time. After few days it returns.
So issue is about oxidation of contacts of the white cable. You can not really to clean this oxidation because contacts are sitting inside of white plastic ends of the cable.


What fixed the issue for me (for long time now) is popping out the white cable from both of its ends and plugging it back when swapping between its ends: each end went into other end original socket.
Removing of the cable jacks ends completely was not easy task for me - both of them are glued with some glue to sockets on boards.
Make sure you do it gently to avoid breaking of anything. Try to pulling off the glue itself first. Use some tiny grabbing tool to do it.

Good luck.