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Stereo Amp board not working

bobShera

Jan 9, 2023
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Jan 9, 2023
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I have an NAD 7175 Stereo Receiver which is working, but not producing any sound.
On the main power board, R709 & R711 are getting way too hot.
There is are burn marks on the circuit board, see attached pick.
I have replaced a diode and a couple of other components but have not figured out why there is heavy current draw. I have checked neighboring components and they seem ok. Am a bit new to circuit diagnosis, not sure where to look next.



Here is a link to the service manual.
https://www.audioservicemanuals.com/n/nad/nad-60-7600/nad-7175/15231-nad-7175-pe-service-manual
 

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