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Nad c-370: Right Channel drops out

I took my NAD to a local repair shop to investigate why the right channel goes out on my amp and they proposed to charge me $420 to install a main amp kit, a filter set plus labor. Needless to say, I paid them their $70 "diagnostic fee" and brought the Nad home, unrepaired.

I am a bit baffled because I can get the right channel to come on if I tinker around with the amp by switching source inputs form CD to Video and so on. I have been reading on the internet about problems with these amps due to capacitors overheating and bugging out. Is there a particular capacitors or group of capacitors that I could replace myslef and get my rig running again?
tbone1
timrhu
2,779 posts
 
Put the busted NAD on ebay with disclosure.
hifitime
715 posts
 
At least you didn't pay $420 for something unknown.Even if you gave them the $420,you still might have an amp that needs new caps.There are a lot of shops out there looking for easy money.That makes it harder for the true good shops.
tbone1 OP
20 posts
 
I don't think the shop even took the cover off. If they did, they didn't seem to make any attempt to blow out any of the dust inside of it.
hifitime
715 posts
 
Maybe a shop/dealer that's been around for a long time selling upper end gear.If they don't work on your brand,they might have a good shop to go to.A dealer in my area that could be trusted with anything retired.Nobody bought his business most likely because he was mainly a stereo guy.With the new tv's,everybody wants multichannel home theater. Last resort I guess like suggested above, shipping out might be the best option.Packing,shipping, bummer.
magfan
1,583 posts
 
I know there is sometimes special knowledge involved, but really. Once a tech has the schematic and test values what could possibly go wrong? Mechanical disassembly except in special cases is pretty routine.
The only 'glitch' in the ointment would be proprietary parts / devices or, for example, the 'potted' gain cell circuitry in my PS Audio integrated. I don't see NAD using any such parts or devices.

Any tech should be able to fix a NAD amplifier unless a board has been charcoaled.
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