09-15-2022, 06:37 AM
(09-15-2022, 05:40 AM)wibble Wrote: The heart rate sensor window is clear plastic, stuck to the back cover. Depending on how well I align it when I put the back cover on it sometimes looks like there's some pressure on the back, raising the middle of the window slightly. It's seem most easily if you view at an angle to see the distortion of the reflection on the window. I could imagine this leading to a leak over time. Since I stuck the back on myself I've assumed it will leak, but between sweat and rain it's been ok so far.
I believe @Spater had a sealed unit, so this may indicate some manufacturing check that needs to be performed during assembly.
The erosion definitely looks as if it came through the area where there is the heart rate window. The rest of the PCB looks corrosion free.
It still may not explain the display though.
@Spater How did you clean the green corrosion? Ideally you try some non-conductive anti-corrosion cleaner (maybe pure alcohol?).