No sound from my NAD C325BEE amplifier

Distortion is categorized in Hum, Motorboating etc. Anyway see page 9 of owner manual for help.
NAD C325BEE AMPLIFIER OWNER'S MANUAL ' ManualsLib

For further help see page 24 of Service Manual

NAD C 325BEE SERVICE MANUAL Pdf Download ' ManualsLib

One way of proving it ISN'T the amp circuitry is to remove the pre-main jumpers and jack in a source that has its own volume control (or try a CD that starts really low) because this bypasses ALL the amps controls. If it sounds ok (albeit LOUD) I'd suspect oxidized contacts on the controls. Turn it off and vigorously operate all controls a zillion times to wear through it. In mosty cases it's the unused controls that fail because they never get wiped. Maybe a shot of contact cleaner on those you can access.

http://www.overload.it/supporto/643/manuali/NAD-C350.pdf

See link below.

http://www.pithed.org/2007/10/12/nad-c370-protection-circuit-repair-amp-fails-goes-into-protection-mode/

trace the signal into those ic's, if there is input then the outputs aren't working unless of coarse you have no supply to them, then they wouldn't output sound.

Before you continue, turn the volume DOWN. If you can't hear it at mid-volume there's no sense in spinning the volume knob higher. You'll only endanger your ears and speakers if you suddenly resolve the switch or whatever is the problem.

Are all sources acting the same?

Check these things (from the manual):

Tape Monitor selected?

Muting?

Headphones inserted?

Jumpers missing between Pre-Out / Main In?

BTW: the manual is available at retrevo.com

It sounds like the CD player is going into standby mode. When this happens it is usually a power supply issue. Look for bad capacitors or solder joints in the power supply. If you don't know what a bad cap or solder joint looks like, take it to a NAD repair shop.

OK,  That means there's some kind of crazy fault in the temperature sensing circuits. I'm afraid you'll have to take it someplace and have it looked at for a more thorough diagnosis.

check your output stage for bad speakers cable or bare wire of cable touch the body of amp----short circuit speaker cable----bad speaker it self------ bad input cable or defective input device .
disconnect all and check if it is ok---start to connect one by one from input to outputs------if all above failed you must contact service center for help.

Only the right channel had a sound,the left channel is mute, whatever adjustment you did and whatever balancing you done nothigs happen,even you interchange the speakers. The problem is in the power amp. The STK IC there is busted already, it's better to change it with a new one so the performance become normal again.