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benjoh 25th March 2005 07:07 PM

Circuit diagram, service manual or help for NAD C350?
Having problem with my NAD C350. Circuit protection activates approx. 5 seconds after power on, with or without speakers attached.

Any ideas or a link to where i can find a circuit diagram?

Thanks in advance!


isticism 17th September 2008 03:32 PM

I've got the exact same problem. Have you figured anything out? Gotten access to a service manual?

burbeck 17th September 2008 05:56 PM

hi tim

isticism 17th September 2008 06:03 PM

Here's my email:


vitopro 20th July 2011 09:32 PM


Originally Posted by burbeck (
hi tim

Hi, i am the same problem, i cannot find the NAD C350 service manual.

Can anybody send ito to me?

my email address is


Bill_P 20th July 2011 10:13 PM

From my file archives, copied from various sources:

Nad C350 turns on and is stuck in protection mode with red LED on.

C119, C145, C155 and C159 were found to be open.

Other common failure points are C143, C144, C146, R401, and R402.
A bulletin from NAD advises to replace R401 and R402 with jumper
wires. This modification is implemented in production from Serial
no. H08C35005910.

sucht 21st September 2011 01:54 PM

could someone please send me the NAD C350 service manual?


edboom 10th September 2012 11:57 AM

I know this is an old thread but I'm in need of a schematic/service manual for the NAD 350 as I have the same kind of issue. I'm a newbie and this is my first post! I've taken the amp apart and it at least one cap is so fried I can't read it's value! My email address if anyone could send this info is:

mattier 26th October 2012 09:27 AM

I looking a service manula Nad C350.
Pleace send me on emial

wizardofoz 28th June 2013 09:49 AM

me too anyone still have a copy?

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