Question about NAD C370 2-Channel Amplifier

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My Nad C 350 has a channel that just isn't working, are there some fuses or similar that I can check if I open up the unit

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Posted on Jan 02, 2017

marsrover
  • 682 Answers

SOURCE: The right channel on my NAD intergrated amplifier C320Bee no longer works.

if you did test for your cable and speaker and you find it fine-your problem will be in output stage of your amp and needs aid of service center.

Posted on Jul 15, 2008

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When I turn on my C350 there is no peer getting to the unit - no power light etc. It worked fine then suddenly stopped overnight. I have checked the plug fuse but that is fine. What else can I do without...


On the back you'll probably find it has it's own AC fuse in an unscrew cover/capsule which has a clear glass body with two metallic ends. If it looks OK you'll see a silver strand (sometimes copper) of wire inside, if not you'll see it's shredded and somewhat burnt remains.
On the metal end tips will be the info on what rating and type the fuse is. Most eletrical stores will supply another.
If fuse is OK put it back.
If this arrangement isn't there check all info on the back panel looking for any mention of internal fuse.
That means the same type of fuse is in a holder inside the AC-DC unit of the circuitry and I can't advise you to take the cover off and look for it and replace it unless you really are familiar with the innards of equipment.
Check the book if you've got it.
By now, if no further on it's repair shop time.

Sep 26, 2011 | NAD C350 2-Channel Amplifier

1 Answer

The left main channel not working. hook any speaker to it and putting my ear close, it has a very low hollow sound, almost a hum. would there be fuses, a reset, or something on each channel or something...


There is no seperate fuse but it seems likely that the left side preamp or the power amp section had opened up a fusible resisitor that could have shut the section.
Now the only way out is to take a voltage or signal test with the right - working- channel as a reference . Please attempt only if you are familiar if not it will end up with further damage as the sections are very delicate. Testing with a signal will confirm the faulty section to narrow down your search.

Aug 23, 2011 | NAD T742 Receiver

1 Answer

NAD C270 amp won't switch from red power/protection to green.


The AH may denote "slo-blo" style as opposed to Fast-acting
A fast-acting fuse will look like a single strand of wire ( maybe wiggly looking) ..A Slo-blo will have an element in it and a spring

Apr 11, 2009 | NAD C270 2-Channel Amplifier

1 Answer

No power at all on NAD C370


User manual here
http://nadelectronics.com/img/manual/NAD-C370.pdf

Read page nine for some simple troubleshooting tips and see if that helps.

It *could* be a fuse but given you've owned it for a while and NAD amps often have capacitor issues in the power supply, chances are it needs some serious work by a good tech. Contact NAD directly and see what they recommend.

Dec 29, 2008 | NAD C370 2-Channel Amplifier

1 Answer

The right channel on my NAD intergrated amplifier C320Bee no longer works.


if you did test for your cable and speaker and you find it fine-your problem will be in output stage of your amp and needs aid of service center.

Jun 11, 2008 | NAD C320 2-Channel Amplifier

1 Answer

NAD C350


Take a ohm meter and measure resistance from emiter to collector should have a few kilo ohm on output transistor.
If no ohm meter available , remove output transistors from circuit.
note position of transistor . you have a NPN and a PNP for each channel.
Replace fuse and power up. If fuse blows check bridge in the power supply.

80% of the time output transistor burn and blow the fuse.
before replacing output transistors check driver transistors they probably burnt also

Apr 29, 2008 | NAD C350 2-Channel Amplifier

2 Answers

Nad amp failure


Check fuses mounted near transformer . If blown check output transistor. Also check transistor transistors on small heat sink . they will cause fuse to blow.

Mar 10, 2008 | NAD C350 2-Channel Amplifier

3 Answers

NAD 370


try to re-set mini circuit breaker inside.

Jan 21, 2008 | NAD C370 2-Channel Amplifier

1 Answer

Gem Sound XP-350 both channels failed


Speaker fuses are generally fast-blow styles 250 volt glass
If an amp shuts down, with speakers connected, it sounds like one of the power supply lines does NOT like what it's "seeing" . Probably output transistors bad ( or module)

Take it to a tech.

Scott out.

Dec 02, 2007 | NAD C350 2-Channel Amplifier

1 Answer

NAD L40


1.due to some short circuit in your receiver circuit has made the fuses blown
2.Replacing the fuses alone does not get solve.
3. Check the reciever power circuit
4. check whether output is being short circuited
5.Contact service centre

Jul 10, 2007 | NAD L40 CD Player

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