Question about NAD C340 Integrated Amplifier

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Need a transistor spare part for NAD C340

Some years ago I sent my NAD C340 away for repairs under guarantee. It kept cutting out and wouldn't switch between inputs. It wasn't repaired properly. When I got it back it had a horrible fuzzy noise in the right channel. I sent it back for repair through the retailers shortly before the guarantee expired. But it was again sent back with the same problem. I phoned NAD customer services. The man I spoke to was very unhelpful. He told me they were not going to bother. After being left unused for some years I took it to a local repairer. He isolated a transistor which needs replacing, but after searching he said he couldn't find a replacement. I only got about a year's good use from that amp. I am furious with the NAD UK distributors of that time - Lenbrook. The transistor spare part needed is 2FA949. Why should NAD make amps which become obsolete so soon? Any other solutions?

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Odd a transistor would have such a #. No 2Fanything series. It is most likely a 2SA949.... a PNP audio driver transistor.
It can be replaced by a NTE-383 (ECG383) transistor, though it's best to order the original # from a Japanese semiconductor supplier like MCM in Ohio.
It's best brought to a good hi-fi or guitar amp repir shop for a proper go-thru & repair.

Mark S. CET Sr. Dover, NH

Posted on Nov 07, 2008

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Cracking noise nad c340


Sometimes you can find the faulty part by touching the parts inside the amp. Only touch the plastic parts not any metal parts! As it is on one channel you have a good channel to compare the bad. Often small transitors can become noisy so start with them!

Nov 18, 2012 | NAD C340 Integrated Amplifier

1 Answer

My NAD C320 outputs a very low sound volume


Hi there I have a C340 that has similar problem, you must have bought this from ebay, lol.

Nad made a mistake on the C range, the pre - power link can be shorted out. if the pre is shorted out it takes out the pre amplifier stage, I have managed to get the right channel working, I will keep you informed what is the cause of the left channel. I have replaced the pre-amp IC and a couple of Jfets and transistors. Once I have repaired the Amp I could repaire yours if you like???

Apr 14, 2012 | NAD C320 2-Channel Amplifier

1 Answer

Unsure of connections from nad c340 to power amp, cant get both speakers working


It sounds like you're guessing.


Have you looked at the manual?


Register and download the manual for free at retrevo.com

http://www.retrevo.com/support/NAD-C340-Amps-manual/id/8043dj588/t/2/

Page 7.

Tell us about the source(s) that won

Mar 25, 2011 | NAD C340 Integrated Amplifier

1 Answer

I've bought my NAD C326BEE amplifier almost two years ago, and i got promised a hell of a good quality and that it would last for YEARS. But ever since i bought the damn amplifier, it has been shutting off...


Hi there,
I'm also a Nad fan. I find this pretty odd that you should loose two in such a short space of time. The cutting out is due to the "protection circuit". I would be inclined to get your speakers checked out as if they are faulty or not "matched" to the amp, it will trigger the amp to "protect itself" and shut off.

Jan 07, 2011 | NAD C326BEE Amplifier

1 Answer

NAD C320 system sounds like a cheap, tinny tranny


Let's distill this down to its simplist configuration. FM source, stereo.

BTW, a search for NAD 440 only brings up a C440 >>>Tuner<<, no receivers. Are you sure about that model number? The only receiver model numbers with x40 on the NAD website are the C340 and C740, neither of which has a link to a manual (go figure). I have the C740 manual, so I'll use it for a loose reference.

If it still does what you're describing in a basic configuration and the volume control seems to affect it like you belatedly mentioned, I'd suspect a noisy volume control or some other control in the receiver (like a rarely used Tape Monitor switch) that is always there in the circuit but may have oxidized contacts and responds sometimes to burn-through.

Set the volume at a medium setting and repeatedly operate every switch, knob and button (one at a time) to gauge its effects on the sound. You may find one is the culprit. Then it's a matter of accessing it for a shot of contact cleaner.

If you have jumpers between Pre Out and Main In, it might be a good idea to reseat them, too.

Mar 23, 2010 | Amplifiers & Preamps

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NAD C340 The power amp is very muffled on the the left channel and right doesn't work work at all. Any ideas


it seems like your amp has a malfunction, it may be because some of the power transistors fried or the power IC

Aug 19, 2009 | Amplifiers & Preamps

2 Answers

Crackling power switch on NAD 3220PE


Hi, i would try flooding trhe switch with CRC 2-26 for a start. Itr may recover some contact integrity. A jerry rig solution would be to bridge the switch contacts and leave it on all the time(i leave my amps running all the time) or if as in Australia you have a switch on the wall socket use that,


OR purchase a new switch from here. Not sure how you would go through NAD, probably dont have any in stock as a spare these days.

or if that does not work out, I could get one to you through ebay. Used to be quite a common TV switch, but I also remember replacing then in Nad amps, many moons ago ;) I think I still have a one in stock myself, packed away from when I was a NAD service agent:)

regards
robotek

Nov 04, 2008 | Amplifiers & Preamps

3 Answers

NAD C340 has lost ability to switch between inputs


I have the same problem which started about a month ago and seems to be getting worse. I also noticed today, that 1 channel is significantly louder than the other - fault in the pre-amp stage, as feeding the power stage directly gives balanced, albeit extremely loud sound! Looking on eBay, I found someone else selling an amp with both problems. It would nice to think that NAD would acknowledge a design flaw, and fix for free, but my amp is 5 year old.

Jul 14, 2007 | NAD C340 Integrated Amplifier

1 Answer

Amplifier cutting out when volume is increased


yea my friend your audio ic or transistor is either getting faulty or you have lose connection have a tech look at your set and make the nessecary repairs.good luck

Apr 26, 2007 | NAD C340 Integrated Amplifier

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