tumegpc
Member
I recently purchased the latest version of the SDS200 with serial #9800 and noise mitigation factory installed. And again the humming noise was quite evident. So I decided to do Unauthorized modification to see if I would get better results. Using an existing solder point on the bottom side of the LCD shield, I was able to solder a wire and secure a good chassis ground. Mitigation was part removed. I can say that it made a huge difference and I can barely hear any noise coming from an external speaker. I have to put my ear about 2 inches away to hear anything.
I also did a shield to PCB ground using solder but did not hear a difference when compared to the chassis, so I thought this would be the easiest modification.
I also did a shield to PCB ground using solder but did not hear a difference when compared to the chassis, so I thought this would be the easiest modification.