Technically, the battery polarity ok; red=positive, black=negative. I opened my DSO Quad up and the silk-screening on the board appears to be labeled properly, so it looks like it’s the connector socket that’s been soldered in the wrong way around.
Technically, the battery polarity ok; red=positive, black=negative. I opened my DSO Quad up and the silk-screening on the board appears to be labeled properly, so it looks like it’s the connector socket that’s been soldered in the wrong way around.