NAD C350 - constant relay clicking?

[FelixM]

Hi all - I've been reading through all the posts of people having issues with their NAD amplifiers, but I haven't come across the specific issue I'm having and I'm a bit lost:

When turning on, the amp just goes into this loop of clicking the relay(s) every second or so, and the light is orange/red. I've opened it up, and the R401 and R402 are already replaced with a jumper as per the service bulletin. The caps look like they haven't leaked, but I only have a multimeter and I'm not sure if that's enough to measure them.

Any advice or suggestions what I can test to narrow down the issue?

Thanks in advance,
Felix

 

[Mooly]

First step is to see which relay/s is or are clicking. There is one for the speaker output and one for the power supply. The first proper step in any faultfinding like this is to measure the voltage rails and make sure they are all correct.

 

[jean-paul]

With NAD/Bluesound devices it is very wise to start replacing electrolytic caps for real good ones as they have the habit to use plain bad stuff.

Best example of a company producing mediocre hardware and still having enthusiastic buyers/owners.